JP3233303B2 - Carrier tape performance tester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tester for performing a performance test such as suction of an electronic component mounted on a carrier tape used in an electronic component supply device, and more particularly to a tester mounted on the carrier tape. The present invention relates to a testing machine capable of observing burrs such as paper fibers generated from a mounted state of electronic components and a material of a carrier tape.

[0002]

2. Description of the Related Art In recent years, electronic devices have been miniaturized, and electronic components used for them have been reduced to several hundred microns. For this reason, higher precision is required for supplying components to the component mounting machine than before.

[0003] For this component supply, a tape cassette for feeding a carrier tape, in which electronic components are stored and held at regular intervals, to a lower portion of a suction nozzle is usually used.

Here, in order to suck a fine electronic component with the suction nozzle, the component supply position on the carrier tape must be exactly below the suction nozzle.
That is, the length between the reference pin for mounting and positioning the parts cassette on the parts mounting machine and the sprocket wheel for driving the tape, which is the parts supply position, must be exactly constant.

Conventionally, when measuring the accuracy of the parts cassette, two reference pins are provided on a reference base, and holes formed at predetermined positions of a master gauge are inserted into the reference pins and provided on the reference base. The optical axis of the camera is aligned and fixed to the reference point formed on the master gauge.
The master gauge was replaced with the part cassette to be measured, and the displacement of the center of the claw of the sprocket wheel of the part cassette was measured.

However, in order to measure the center shift by the camera, the master gauge and the parts cassette must be replaced each time, and it is difficult to perform accurate measurement due to a change in the mounting condition and the like, and the reliability of the inspection is low. There is a problem that the property is low.

In order to solve this problem, the camera is moved so that the image of a predetermined portion of the member to be inspected captured by the camera is located at the center of the display means, and the amount of movement is measured to measure the size of the member to be inspected. Inspection apparatuses have been proposed in which the dimensional accuracy of a member to be inspected is accurately measured by measuring the accuracy.

In addition, as a mechanism for accurately performing positioning,
One of the positioning pins is used as a reference pin, the other pin is used as an eccentric slave pin, and by selecting the eccentric state of the slave pin, the base is turned around the reference pin as a center of rotation to perform positioning. A mechanism for performing: a tape guide portion for regulating the storage tape in the width direction, and a positioning mechanism for aligning the suction surface of the suction chuck of the component extracting means with the center of the exposed electronic component; A mechanism in which the base is selectively rotated around the reference pin and the suction surface is adjusted to the center of the electronic component by the tape guide portion; and further, the image is picked up on either the suction nozzle side or the electronic component side. There has been proposed a nozzle inspection apparatus or the like provided with a means and provided with a display means for displaying a captured image.

[0009]

However, in both the above-mentioned prior art and the proposed art, a mechanism for accurately positioning a carrier tape housed in a parts cassette and a measuring means therefor are disclosed. There is a problem that the mechanism becomes complicated, and high accuracy is required when capturing the electronic component with the camera and measuring the amount of movement of the electronic component to determine the positioning.

Therefore, even if the configuration of the testing machine is simple,
There is a problem to be solved in that the position at which the electronic component accommodated in the carrier tape is adsorbed can be accurately grasped and the mounting state of the electronic component can be observed.

[0011]

According to the present invention, there is provided a carrier tape on which a number of electronic components are aligned and mounted, feed means for feeding the carrier tape one frame at a time, and Suction means for sucking the electronic component, an XY stage moving in the X-axis and the Y-axis, and a cavity observing device arranged at a position for sucking the electronic component from the carrier tape and for observing a feeding state of the carrier tape. A carrier tape performance tester comprising: a camera; and a component suction state observing camera for observing a suction state of the electronic component with respect to a suction nozzle.

A first light source attached to the lens barrel of the camera for observing the cavity and irradiating the component supply position with light from above, and a first light source attached to the stand and irradiating the component supply position with light from below. This is a carrier tape performance tester provided with a second light source.

[0013]

[0014]

[Function] A carrier observing mechanism equipped with a camera for observing a component and a camera for observing a component at a component supply position so as to observe the suction operation of an electronic component and to observe the accuracy of feeding a carrier tape and the accuracy of a component supply position. By providing the portion, it is possible to observe the state of actual suction and to observe only the carrier tape feeding means.

The camera for observing a cavity is provided with an upper lamp as a first light source for irradiating the component supply position, and the feed / suction mechanism is provided with a lower lamp as a second light source for irradiating the component supply position. In addition, it is possible to accurately observe the state of the electronic components mounted on the carrier tape, observe the electronic components as silettes, and observe burrs such as paper fibers generated from the material of the carrier tape.

[0016]

An embodiment according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a carrier tape performance tester 1 according to a first embodiment of the present invention includes an XY stage mechanism 2, a feed / suction mechanism 8, a parts cassette 29, and a carrier tape. And an inspection mechanism 32.

The XY stage mechanism 2 is composed of an X table unit 3 and a Y table unit 5, as shown in FIGS.

The X table unit 3 moves the Y table unit 5 toward and away from the feed / suction mechanism 8 by the X-axis drive motor 4.
This is a structure that operates according to the suction mode.

The Y table unit 5 is provided on the X table unit 3 and includes a Y axis drive motor 6 and an XY table 7 on which electronic components sucked by the feed / suction mechanism 8 are placed. The X-axis is driven by the Y-axis drive motor 6 in a direction parallel to the feed / suction mechanism 8.
The Y table 7 can be moved. The X table unit 3 and the Y table unit 5
Means that the Y table unit 3 is moved in the X-axis direction in synchronization with the suction mode of the feed / suction mechanism section 8 and the XY table 7
Is moved in the Y-axis direction so that the sucked electronic components can be aligned and placed neatly.

The feed / suction mechanism 8 comprises a pick-and-place unit 9, a feed mechanism 15, and a parts cassette mounting base 23.

The pick and place unit 9 includes a drive motor 10, a cam box 11, and a suction nozzle 12.

The rotation shaft of the drive motor 10 is connected to the rotation shaft of the cam box 11 so that the cam in the cam box 11 can operate by driving the drive motor 10.

The cam box 11 has three cams A, B,
C and has a structure that rotates on the same axis. The cam A is configured to move the suction nozzle 12 in the direction of the XY table 7 of the XY stage mechanism 2.

The cam B rises to suck the electronic components mounted on the carrier tape of the parts cassette 29,
When the electronic component is dropped and the electronic component is sucked, the XY table 7
It is structured to rise and fall to be placed on

The cam C is on the opposite side of the drive motor 10 and is connected to the extension of the rotation axis of the drive motor 10 so that the feed lever of the chip mounter of the parts cassette is pushed down to feed the carrier tape one frame at a time. Has become.

The suction nozzle 12 is fitted and fixed to the tip of a pick-and-place lever 13 having a flat bar shape. A, B
, A structure that performs ascending, descending, and horizontal movement operations.

As described above, the cams A and B of the cam box 11
The suction nozzle 12 can perform operations of ascending, descending, and horizontal movement, so that the suction nozzle 12 approaches the electronic component of the carrier tape at the component supply position E from above the carrier tape, and when a predetermined interval is reached. The electronic component is sucked by suction.

Then, it rises again in the sucked state and moves horizontally in the direction of the XY table 7. Then, the electronic component can be placed on the XY table 7 by canceling the suction operation when the predetermined position of the XY table 7 is reached and the predetermined interval is reached. At this time, since the XY table 7 moves in the X-axis direction or the Y-axis direction in conjunction with the suction operation, the picked-up electronic components can be aligned and arranged in order.

The feed mechanism 15 includes a parts cassette 29
And a feed lever drive link 16, a vertical drive link 17, and a feed lever drive cam follower 19.

The feed lever drive link 16 has one end of a rod-shaped link rotatably fixed to the end of the cam box 11 and presses against the cam C at a position close to the fixed side, and has the other end. It is connected to a vertical drive link 17 that moves up and down.

The vertical drive link 17 is connected to the cam box 11
The lower end of the link is rotatably connected to the feed lever drive link 16 and is mounted on the chip mounter near the center. One carrier tape
This is a structure provided with a feed lever 18 for moving the pieces forward.

Feed lever drive cam follower 19
Are connected in parallel in a state of being held by the vertical drive link 17, and the vertical drive link 1 is provided at the center thereof.
7 is provided with a long groove in the longitudinal direction in which the locking portion is loosely fitted, and a lever 21 for rotating the take-up reel 20 for winding the top tape covering the front surface of the carrier tape is provided at a predetermined position above the groove. This is a structure including a pushing protruding portion 22.

The feed lever drive cam follower 19 having the above-described structure has a vertical drive link 17 connected to the cam C.
Is pushed upward through the groove of the feed lever drive cam follower 19 from the middle of being pushed upward. Then, the take-up reel 20 rotates in the winding direction via the lever 21 connected to the protrusion 22. Since the rotation amount moves in conjunction with the cam C, the rotation amount is directly proportional to the moving speed and distance of the carrier tape.

The parts cassette mounting base 23 is a base that adjusts and mounts a parts cassette provided with an evaluation reel around which a carrier tape on which electronic components are mounted and which has an evaluation reel at an appropriate position for feeding and sucking. A base 24 on which a parts cassette is mounted, micrometers 25 and 26 for finely adjusting the mounting position of the parts cassette to the X axis / Y axis, and the base 24 fixed at a predetermined position on the X axis / Y axis. This is a structure including position lock screws 27 and 28.

The parts cassette 29 includes an evaluation reel 30 in which a carrier tape is wound and stored, and a carrier tape from the evaluation reel 30 at a predetermined interval and time.
And a chip mounter 31 which sends out the pieces one by one.

The chip mounter 31 of the parts cassette 29 is mounted on the base 24 of the parts cassette mounting base 23.
And finely adjusted and fixed by the micrometers 25 and 26.

As shown in FIGS. 2 and 3, the carrier tape inspection mechanism 32 includes a camera 33 for observing a component suction state.
, A cavity observation camera 34, and a test machine control box 35.

The camera 33 for observing the state of picked-up components is used to monitor the behavior of the carrier tape,
This is a camera for observing the suction state of the suction nozzles 12, missing electronic parts of the carrier tape, and recording the information on a video tape or the like.

The cavity observing camera 34 observes the feeding condition of the carrier tape at a position where electronic components are sucked from the carrier tape, that is, a so-called cavity portion, and measures the dimensions of the carrier tape feeding accuracy, the accuracy of the component supply position E, and the like. It is a camera for measuring. The data captured by the camera 34 for cavity observation is appropriately recorded on a video tape or the like.

The testing machine control box 35 drives the carrier tape performance testing machine 1 and, at the same time, the camera 33 for observing the component suction state or the camera 3 for observing the cavity.
4 is a control box provided with an operation group for measuring the performance of the carrier tape by driving and driving the recording medium on a video tape or the like and reproducing it on a display unit (not shown). The structure is such that control of the stage mechanism 2 and control of the suction / feed mechanism 8 are also possible.

In order to test the performance of the carrier tape by the carrier tape performance tester 1 having such a configuration, first, the carrier tape is set on the evaluation reel 30 of the parts cassette 29 and the base of the parts cassette mounting base 23 is set. Attach to 24 and clamp.

Then, the testing machine control box 35
By turning on the test switch in the group of operations, the so-called cycle operation described below can be started.

When the drive motor 10 of the pick-and-place unit 9 constituting the suction / feed mechanism 8 is driven to rotate, the cam C in the cam box 11 rotates.

The rotational movement of the cam C is converted into the vertical movement of the feed lever drive link 16, and the vertical drive link 17 moves up and down. This vertical drive link 17
By pushing down the feed lever of the chip mounter 31 of the parts cassette 29 via the feed lever 18 when the ascends and descends, the carrier tape mounted on the chip mounter 31 is fed by one frame.

At the same time, the cam B in the cam box 11 linked to the drive motor 10 rotates, and the pick-and-place lever 13 starts descending. Falls toward the electronic component of the carrier tape at the component supply position E.

Then, while descending, the vacuum of the suction nozzle 12 is turned on, not shown, and the shutter of the camera 33 for observing the component suction state is opened to start recording the component suction state on the video tape, not shown. I do.

In this state, the suction nozzle 12 further descends and reaches the upper surface of the electronic component to suck the electronic component.

After the suction nozzle 12 sucks the electronic component, the suction nozzle 12 moves up by the cam B. At the same time, cam C
As a result, the vertical drive link 17 rises and the chip mounter 31
By raising the feed lever drive cam follower 19 while raising the feed lever, the take-up reel 20 is rotated counterclockwise to wind the top tape.

Next, the pick-and-place lever 13 is moved to X by the rotation of the cam A.
It moves in the direction of the Y stage mechanism 2, that is, starts moving in the direction of the XY table 7.

The suction nozzle 12 which has moved to a predetermined position on the XY table 7 starts descending by the rotation of the cam B, and when the predetermined distance from the XY table 7 is reached, the vacuum is turned off and the suctioned electron The parts are placed on the surface of the XY table 7.

The XY table 7 is predetermined by the testing machine control box 35 so that it can move in the X-axis or Y-axis direction at a slightly larger interval than the electronic component every time the electronic component is placed.

The rotation of the cam B again causes the suction nozzle 12 to rotate.
Rises.

The rotation of the cam A causes the pick and place lever 13 to move away from the XY stage mechanism 2, ie, the suction nozzle 12 also moves toward the component supply position E of the parts cassette 29.

By repeating the above-mentioned steps, the electronic components mounted on the carrier tape can be sent out one frame at a time, sucked one after another from the component supply position E and arranged neatly on the XY table 7 to arrange the electronic components. You can.

Then, the state of the suction is observed in the above-mentioned cases, that is, the behavior of the carrier tape at the time of supplying the components, the behavior of the components, the suction error, the missing parts, etc. are recorded on a video tape, and later analyzed by slow reproduction or the like. , For analysis.

When observing the feeding accuracy of the carrier tape or the like, the cams A and B in the cam box 11 of the pick-and-place unit 9 retract the pick-and-place lever 13 which moves up, down, and moves horizontally. The suction nozzle 12 at the tip of the pick and place lever 13 is retracted from the component supply position E so as not to transmit the rotational movement of the cams A and B.

Then, the suction nozzle 12 is kept in the retracted state, and the camera 34 for observing the cavities is installed at the position shown in FIG. This position corresponds to immediately above the component supply position E. In this state, the so-called cavitation at the component supply position of the carrier tape is recorded on a video tape or the like without the suction operation by repeating the above-mentioned steps, so that the dimensional accuracy such as the carrier tape feeding accuracy and the component supply position accuracy can be observed. Will be possible.

The second embodiment according to the present invention relates to the carrier inspection mechanism 32, in which the suction nozzle 12 is kept in the retracted state, and the camera 34 for cavity observation is kept.
Is positioned just above the component supply position, and the component supply position E is irradiated with light from above or below.

That is, as shown in FIG. 4, an upper lamp 36 as a first light source attached to the tip of a lens barrel of a camera 34 for cavity observation, and a chip mounter 31 attached to a stand 39, and a component supply position thereof. E has a structure in which a lower lamp 37 as a second light source for irradiating light from below is attached.

The cavity observation camera 34 is provided with an XY stage provided with a micrometer (not shown) for fine adjustment in the X-axis / Y-axis directions on the base 41.
The video camera is mounted on the tip of a support rod 40 mounted at a right angle to the adjustment hole standing on the Y stage, and a video camera is mounted on the upper part of the camera 34 for cavity observation. Therefore, the camera 3 for cavity observation
The adjustment of 4 can be finely adjusted by the X-axis and Y-axis micrometers provided on the XY stage.

The parts cassette 29 having the carrier tape inspection mechanism 32 having such a structure is incorporated in the carrier tape performance tester 1 of the first embodiment described above.

If the upper lamp 36 is turned on to feed the carrier tape 38, the state of the electronic components mounted on the carrier tape 38 can be more clearly observed.

Also, with the lower lamp 37 turned on,
By sending the carrier tape 38, the state of the electronic components mounted on the carrier tape 38 and the mounting position can be observed in a silhouette state,
For example, it is possible to clearly observe the outline of the electronic component, and to observe the paper fiber burr when the carrier tape is made of paper fiber. It is also possible to observe the feeding accuracy of the carrier tape on which no electronic components are mounted.

[0064]

[0065]

As described above, the carrier tape performance tester according to the present invention is provided with the camera for observing the components and the camera for observing the cavities, observes the operation of sucking the electronic components, and adjusts the feeding accuracy of the carrier tape. By providing a carrier observation mechanism for observing the accuracy of the component supply position, it is possible to judge the performance of the carrier tape and the performance of the suction means by reproducing the recorded suction state. It has the effect.

Further, the camera for observing the cavity is provided with an upper lamp as a first light source for irradiating the component supply position, and a feed / suction mechanism is provided with a lower lamp as a second light source for irradiating the component supply position. Thereby, the state in which the electronic component is mounted can be clearly grasped by the silette, and an extremely excellent effect that the relationship between the burr such as paper fiber generated from the carrier tape and the electronic component can be easily observed can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment showing a main part of a testing machine according to the present invention.

FIG. 2 is a front view of the testing machine.

FIG. 3 is a sectional view taken along the line DD in FIG. 1;

FIG. 4 is a perspective view showing a main part of a test machine according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carrier tape performance tester 2 XY stage mechanism part 3 X table unit 4 X-axis motor 5 Y table unit 6 Y-axis motor 7 XY table 8 Suction / feed mechanism part 9 Pick and place unit 10 Drive motor 11 Cam box 12 Suction nozzle DESCRIPTION OF SYMBOLS 13 Pick and place lever 14 Feed mechanism 15 Feed mechanism 16 Feed lever drive link 17 Vertical drive link 18 Feed lever 19 Feed lever drive cam follower 20 Take-up reel 21 Lever 22 Projecting part 23 Parts cassette mounting base 24 Base 25, 26 Micrometer 27, 28 Position lock screw 29 Parts cassette 30 Evaluation reel 31 Chip mounter 32 Carrier tape inspection mechanism 33 Parts adsorption state observation camera 34 Cavity Observation camera 35 tester control box 36 upper lamps 37 below the lamp 38 Stand 39 Stand 40 support rod 41 base

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuo Tanaka 3515 Kamiwada, Yamato City, Kanagawa Prefecture Inside Kamaya Electric Co., Ltd. (56) References JP-A-2-294047 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) G01M 19/00

Claims (2)

(57) [Claims] 1. A carrier tape on which a large number of electronic components are aligned and mounted, a feed means for feeding the carrier tape one frame at a time, a suction means for sucking the electronic components from a component supply position, and an X-axis and a Y-axis. An XY stage that moves and a position where electronic components are sucked from the carrier tape
And observe how the carrier tape is fed
Observation camera for observing the suction state of the electronic component to the suction nozzle
A carrier tape performance tester comprising a camera for observing a component suction state . 2. A camera mounted on the lens barrel of the camera for observing the cavity.
And irradiates the parts supply position with light from above.
1 light source and attached to the stand and below the part supply position
The carrier tape performance tester according to claim 1, further comprising a second light source that irradiates light from the carrier tape.