JP3752304B2 - Electronic component conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic component transport apparatus that transports a chip-shaped electronic component by sucking and holding the chip-shaped electronic component on a holding portion of a rotary transport plate.
[0002]
[Prior art]
Hereinafter, this type of conventional conveying apparatus will be described with reference to FIGS.
4 is a partially broken side view of the conveying device, FIG. 5A is a side view of the rotating conveying plate, FIG. 5B is a front view of the rotating conveying plate, and 11 is a rotating conveying plate, 12 in FIG. Is a support plate, and 13 is a motor.
[0003]
The rotary transport plate 11 has a disk shape with a predetermined thickness and diameter, and a plurality of concave portions 11a capable of attracting and holding a chip-like electronic component P (hereinafter simply referred to as a component P) to be transported in a predetermined direction. It has equiangular intervals on the surface, and has a rotating shaft 11b at the center of the back surface. In addition, an annular main suction passage 11c having an opening on the back side and a radial sub suction passage 11d extending from the main suction passage 11c to the bottom surface of each recess 11a are formed inside the rotary conveyance plate 11. .
[0004]
The support plate 12 has a support hole 12a that pivotally supports the rotary shaft 11b. In the state where the rotary shaft is supported, the front surface of the support plate 12 and the back surface of the rotary transport plate 11 are interposed through a fine gap. Opposite. In addition, an annular suction passage 12b whose front side is opened in the same shape as the main suction passage 11c is formed inside the support plate 12, and a suction port 12c communicating with the suction passage 12b is formed on the back surface thereof. ing.
[0005]
The motor 13 is composed of a stepping motor, and one end of the motor shaft 13a is directly connected coaxially to the rotating shaft 11b of the rotary conveying plate 11.
[0006]
This transport device is used when various inspections such as electrical characteristic inspection and appearance inspection are performed on the component P, and the suction port 12c of the support plate 12 is connected to a vacuum source (not shown) such as an air compressor. In a state where the vacuum source is operated, the intended conveyance of the parts is carried out by intermittently rotating the rotary conveyance plate 11 every predetermined angle by the motor 13.
[0007]
Suction force by the vacuum source, the suction passage 12b of the support plate 12, a fine clearance, acts on the bottom surface of each recess 1 1a through the main suction passage 11c and the sub suction passage 11d of the rotary transfer plate 11, thereby in each recess 1 1a This makes it possible to adsorb parts.
[0008]
In the concave portion 11a of the rotary conveyance plate 11 stopped at a predetermined supply position, a component P to be conveyed is supplied in a predetermined direction from a component feeder such as a ball feeder or a linear feeder at the stop timing. It is sucked and held by the suction force generated on the bottom surface of the recess 11a. The components P that are sequentially sucked and held in the recesses 11a of the rotary transport plate 11 are transported by the rotary roll transport plate 11 that rotates intermittently with a predetermined circular locus from the supply position.
[0009]
[Problems to be solved by the invention]
In the conventional transport device, the rotary transport plate 11 can be rotated without any trouble between the back surface of the rotary transport plate 11 and the front surface of the support plate 12, and the components can be sucked and held on the rotary transport plate 11 accurately. It is necessary to form a fine gap. That is, it is necessary to secure a flat surface on the back surface of the rotary transport plate 11 and the front surface of the support plate 12 and to make both surfaces face each other in parallel with a minimal gap.
[0010]
However, the current processing accuracy and assembly accuracy have a limit in making the gap interval smaller than 100 μm, and it is troublesome to perform regular adjustment and maintenance to maintain the gap interval.
[0011]
Moreover, even if the gap interval is further reduced, it is difficult to completely prevent the outside air from entering the suction passage from the gap interval. The outside air intrusion reduces the suction force and enters the outside air together. There is a possibility that the suction passage may be clogged or blocked by dust, resulting in a reduction or variation in suction force.
[0012]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic component transport device that can appropriately hold and hold components on a rotary transport plate.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a rotary transport plate having a plurality of holding portions capable of attracting and holding chip-shaped electronic components on its peripheral surface, and a transport plate in which a motor shaft is directly connected to the rotary shaft of the rotary transport plate. In the electronic component conveying apparatus including the rotation motor, a main suction passage is formed in a central portion of the rotation shaft of the rotation conveyance plate, and a sub suction passage extending from the main suction passage to each holding portion is provided inside the conveyance plate. And a suction passage that communicates with the main suction passage of the rotary conveyance plate when the shaft is directly connected to the motor shaft central portion of the motor, and a suction port that communicates with the suction passage is formed on the motor shaft. It is a feature.
[0014]
According to the electronic component conveying apparatus of the present invention, the main suction passage is formed in the central portion of the rotary shaft of the rotary conveying plate, and the suction passage that is communicated with the main suction passage is formed in the central portion of the motor shaft of the motor. Therefore, it is possible to eliminate the need for managing the gap between the support plate and the rotary transport plate as in the prior art, and to prevent outside air from entering the suction passage system.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a partially broken side view of a conveying device, FIG. 2A is a side view of a rotating conveying plate, FIG. 2B is a front view of the rotating conveying plate, in which 1 is a rotating conveying plate, 2 Is a motor, 3 is a packing, and 4 is a connector.
[0016]
The rotary conveyance plate 1 has a disk shape with a predetermined thickness and diameter, and holds and holds a rectangular columnar or columnar chip-shaped electronic component P (hereinafter simply referred to as a component P) to be conveyed in a predetermined direction. A plurality of possible recesses (12 in the drawing) are provided on the peripheral surface at equal angular intervals, and the rotary shaft 1b is provided at the center of the back surface. Further, a main suction passage 1c having a circular cross section is formed in the central portion of the rotary shaft of the rotary conveyance plate 1 from the shaft end to the inside of the conveyance plate, and inside the rotary conveyance plate 1 from the main suction passage 1c. Radial sub-suction passages 1d extending to the bottom surfaces of the recesses 1a are formed. Further, a connecting flange 1e is provided on the outer periphery of the end of the rotary shaft 1b of the rotary transport plate 1.
[0017]
The motor 2 is a double shaft type stepping motor, and a suction passage 2b having the same cross-sectional shape as the main suction passage 1a of the rotary conveyance plate 1 is formed through the central portion of the motor shaft 2a. One end opening (left end opening in the drawing) of the suction passage 2b is used as a connection port with the main suction passage 1c, and the other end opening (right end opening in the drawing) is used as the suction port 2c. A connecting flange 2d corresponding to the flange 1e is provided on the outer periphery of the end of the motor shaft 2a. The motor shaft 2a of the motor 2 and the rotating shaft 1b of the rotary conveying plate 1 are directly connected on the same axis by connecting the flanges 1e and 2d with bolts or the like via the packing 3, and thereby sucking. The passage 2b and the main suction passage 1c are connected in an airtight manner and communicate with each other.
[0018]
The connector 4 has a bottomed cylindrical shape with an opening at one end, and a bearing 4b that pivotally supports a non-connected end of the motor shaft 2a in an inner hole 4a having a circular cross section, and the same portion rotates in an airtight state. A seal member 4c is provided to hold it movably. The connector 4 is provided with a connection port 4d to which a tube from a vacuum source (not shown) such as a vacuum pump is connected.
[0019]
The above-described transport device is configured by intermittently rotating the rotary transport plate 1 at a predetermined angle by the motor 2 in a state where the connection port 4d of the connector 4 is connected to a vacuum source via a tube and the vacuum source is operated. Expected parts transportation.
[0020]
A main suction passage 1c is formed in the central portion of the rotary shaft 1b of the rotary conveyance plate 1, and a suction passage 2c communicating with the main suction passage 1c when the shaft is directly connected is formed in the central portion of the motor shaft 2a of the motor 2. The suction force by the vacuum source acts directly on the bottom surface of each recess 1a through the suction passage 2b of the motor 2, the main suction passage 1c and the sub suction passage 1d of the rotary transport plate 1, and thereby the respective recesses 1a. Part adsorption is possible.
[0021]
A part P to be transported is supplied in a predetermined direction from a part feeder such as a ball feeder or a linear feeder to the recess 1a of the rotary transport plate 1 stopped at a predetermined supply position. It is sucked and held by the suction force generated on the bottom surface of the recess 1a. The parts P that are sequentially sucked and held in the recesses 1a of the rotary transport plate 1 are transported by the rotary roll transport plate 1 that rotates intermittently with a predetermined circular locus from the supply position.
[0022]
Various inspections such as an electrical characteristic inspection and an appearance inspection for the component are performed when the component P in the middle of conveyance stops at a predetermined inspection position due to the intermittent rotation of the rotary conveyance plate 1. As a result of the inspection, the component P determined as a non-defective product is pushed out of the recess 1a of the rotary conveyance plate 1 by a solenoid-driven or cylinder-driven take-off pusher when stopped at a predetermined take-out position different from the inspection position. On the other hand, a part that has been dropped and stored and is determined to be defective is pushed out of the recess 1a of the component conveying plate 1 by a solenoid-driven or cylinder-driven discharge pusher when stopped at a predetermined discharge position different from the inspection position. Fallen and stored in a defective container.
[0023]
As described above, the above-described electronic component transport apparatus does not require the conventional gap management between the support plate and the rotary transport plate, and can eliminate the work burden required for the gap management.
[0024]
In addition, since the normally open gaps in the suction passage system are eliminated, the problem of reduced suction force due to the intrusion of outside air and the problem of passage clogging and blockage due to dust are eliminated, and it is necessary for adsorbing parts to each recess 1a. A stable suction force can be exhibited stably.
[0025]
Furthermore, since a conventional support plate can be eliminated from the back side of the rotary conveyance plate 1, various types of inspection devices can be easily arranged using the back side space effectively.
[0026]
In the above-described embodiment, the rotating conveyance plate is exemplified as a component that sucks and holds the component in the circumferential concave portion. However, the present invention can be applied to a rotating conveyance plate having a holding portion of another shape.
[0027]
Further, although the suction passage is formed through the central portion of the motor shaft, as shown in FIG. 3, the suction passage 2b 'is partway through the central portion of the motor shaft 2a and the suction passage is connected to the suction passage 2b'. A port 2c 'is formed in the motor shaft 2a so as to be orthogonal to the axis thereof, and a cylindrical connector 5 having a pair of bearings 5b and a sealing material 5c in the inner hole 5a is provided in a suction port forming portion of the motor shaft 2a. Even when a tube from a vacuum source is connected to the connection port 5d provided in the middle of the connector 5a, the same operation and effect as in the above embodiment can be obtained.
[0028]
【The invention's effect】
As described above in detail, according to the present invention, it is not necessary to manage the gap between the support plate and the rotary transport plate as in the prior art, and the work burden required for the gap management can be eliminated. Also, since there is no normally-open gap as in the conventional suction passage system, the problem of reduced suction force due to intrusion of outside air and the problem of passage clogging and blockage due to dust are eliminated, and it is necessary to attract parts to each holding part. A stable suction force can be exhibited stably. Furthermore, since a conventional support plate can be eliminated from the back side of the rotary conveyance plate, various inspection apparatuses can be easily arranged using the back side space effectively.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a conveying apparatus showing an embodiment of the present invention. FIG. 2 is a side view and a front view of a rotary conveying plate shown in FIG. FIG. 4 is a partially cutaway side view of a conventional conveying apparatus. FIG. 5 is a side view and a front view of the rotary conveying plate shown in FIG.
P ... Parts, 1 ... Rotary conveying plate, 1a ... Recess, 1b ... Rotary shaft, 1c ... Main suction passage, 1d ... Sub suction passage, 2 ... Motor, 2a ... Motor shaft, 2b, 2b '... Suction passage, 2c, 2c '... suction port, 3 ... packing, 4, 5 ... connector.

Claims (2)

Electronic component transport apparatus comprising: a rotary transport plate having a plurality of holding portions capable of sucking and holding chip-shaped electronic components on its peripheral surface; and a transport plate rotation motor having a motor shaft directly connected to the rotary shaft of the rotary transport plate In
A main suction passage is formed in the central portion of the rotational axis of the rotary transport plate, and a sub suction passage extending from the main suction passage to each holding portion is formed inside the transport plate.
A suction passage that communicates with the main suction passage of the rotary transport plate when the shaft is directly connected to the motor shaft central portion of the motor, and a suction port that communicates with the suction passage is formed on the motor shaft.
An electronic component conveying apparatus characterized by the above. Using a double-shaft type motor as a transport plate rotating motor, and forming a suction passage through the motor shaft central portion, and using one end opening of the suction passage as a suction port,
The electronic component conveying apparatus according to claim 1.

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