JP3278952B2 - How to take out electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of taking out an electronic component for holding electronic components sequentially conveyed by taping or the like at a fixed position.

[0002]

2. Description of the Related Art Electronic components such as semiconductor devices and chip components sealed in a package are stored in a storage container such as taping, and are shipped together to a user. The taping is a long tape in which a plurality of concave portions are formed at predetermined intervals, and each of the concave portions can accommodate an electronic component.

A method of taking out an electronic component when the electronic component is stored in the taping will be described. First, the user attaches the taping to the transport mechanism. A plurality of sprocket holes are provided at regular intervals on both sides of the taping, and the taping is transported by engaging the teeth of the gears of the transport mechanism with the sprocket holes. Then, the electronic component is disposed below a take-out mechanism such as a vacuum suction device which is arranged in advance, and taping is stopped. Then, the take-out mechanism is lowered to suction-hold the electronic component, for example. In this state, the takeout mechanism is moved to a predetermined position, and the electronic component is conveyed to a target position, for example, on a board to be mounted.

[0004]

However, such a method for taking out an electronic component has the following problems. That is, when the take-out mechanism is lowered, a position shifted from the center of gravity of the electronic component is held due to a positioning error of the taping conveyed by the transport mechanism or a variation in a storage position of the electronic component in the concave portion of the taping. become. For this reason, if the holding of the electronic component by the take-out mechanism becomes unstable, or if this deviation is large, it becomes impossible to take out the electronic component. Accordingly, an object of the present invention is to provide a method for taking out an electronic component that can reliably hold the center of gravity of the electronic component.

[0005]

SUMMARY OF THE INVENTION The present invention is a method for taking out an electronic component which has been made to solve such a problem. That is, a method of retrieving electronic components are sequentially fed by the transfer mechanism at a predetermined take-out mechanism, housed volume
Detecting an image including reflected light of the electronic component using a camera arranged at a fixed position above the electronic component conveyed in a state housed in the container , and detecting the image based on an image detected by the camera. Reference position and reflected light of the electronic component
Calculating a position shift from the center of gravity of the electronic component obtained from the image of the electronic component, retracting the camera from above the electronic component, and setting the takeout mechanism to the center of gravity of the electronic component based on the calculation result of the position shift. The method includes a step of moving the electronic component upward, and a step of lowering the takeout mechanism to take out the electronic component.

[0006]

According to the present invention as described above, it is stored in the storage container.
The reflected light of the image of the electronic component, which is sent by the transport mechanism in the state and stopped at a predetermined position, is read by a camera arranged at a certain position above the electronic component. And this turtle
Based on the detected image by La, by calculating the positional deviation between the reference position and the position of the center of gravity obtained from the electronic components of the image of the detected image, it is possible to obtain a shift amount of the stop position of the electronic component. That is, the shift amount of the stop position of the electronic component can be obtained based on the positioning error of the transport mechanism and the variation of the storage position of the electronic component in the concave portion of the taping. Then turtle
By retracting the electronic component from above the electronic component and correcting the amount of movement of the take-out mechanism based on the calculated shift amount, the position of the center of gravity of the electronic component can be reliably held.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a method for taking out an electronic component according to the present invention. FIG. 1 is a flowchart illustrating a method for taking out an electronic component according to the present invention. First, the optical reader is moved 1a, and the optical reader is arranged at a fixed position above the transported electronic component. Then, as an image capturing 1b of the electronic component, a detection image of the electronic component is captured by the optical reading device.

As shown in the perspective view of FIG. 2, the image capture 1b captures a detected image of the electronic component 2 housed in the concave portion 11 of the transported taping 1 by using an optical reading device 3 such as a CCD camera. It is. That is, the taping 1 is mounted on a transport mechanism (not shown), and the gears of the transport mechanism are connected to the sprocket holes 12 of the taping 1.
Are transported one after another. And recess 1
An optical reading device 3 is arranged above a predetermined electronic component 2 housed in the electronic component 1, and captures a detection image of the electronic component 2.
At this time, the arrangement position of the optical reading device 3 is always constant, and this position serves as a reference.

Next, based on the detected image of the electronic component 2, calculation of the center of gravity of the electronic component 2 is performed 1c. That is, the detection image of the electronic component 2 captured by the optical reading device 3 shown in FIG.
The signal is sent to the central processing unit 5. Then, the central processing unit 5 calculates the position of the center of gravity of the electronic component 2. That is, as shown in FIG. 3, the entirety of the electronic component 2 housed in the recess 11 of the taping 1 is shown in the detection image 4a. In order to calculate the position G of the center of gravity of the electronic component 2 from the detected image 4a, first, for example, the detected image 4a is binarized, and the outer shape of the electronic component 2 is recognized from the signal. 2
Information such as the conditions of the binarization process (threshold level and the like) and the external dimensions of various electronic components 2 are stored in a memory 6 (see FIG. 2) in advance.
The external shape of the electronic component 2 is recognized by referring to necessary information from these information.

Then, the center of gravity G is calculated from the recognized outer shape of the electronic component 2. The center of gravity G may be calculated from the outer shape of the electronic component 2 by calculation, or may be obtained by referring to the coordinates of the center of gravity G with respect to the outer dimensions stored in the memory 6 in advance. Next, the amount of deviation Δ between the position G of the center of gravity of the electronic component 2 and the reference position (for example, the center O) of the detected image 4a is determined. That is, due to a positioning error of the taping 1 or a displacement of the storage position of the electronic component 2 with respect to the concave portion 11, the center O of the detection image 4a captured by the optical reading device 3 arranged at a fixed position (reference position) and the electronic The deviation amount Δ from the position G of the center of gravity of the component 2 is obtained.

After the deviation amount Δ is obtained, next, the optical reading device is retracted 1d, and the takeout mechanism is moved 1e. That is, after retracting the optical reading device 3 from above the electronic component 2, the take-out mechanism 7 such as a vacuum chuck is moved above the electronic component 2 as shown in the perspective view of FIG. At this time, the previously calculated deviation amount Δ is given from the central processing unit 5 to the take-out mechanism 7 as position correction information, and the stop position of the take-out mechanism 7 is corrected. Accordingly, even if the storage position of the electronic component 2 with respect to the concave portion 11 of the taping 1 is shifted, the shift amount Δ is calculated, so that the take-out mechanism 7 can be disposed directly above the center of gravity G of the electronic component 2. Become.

Next, electronic component take-out 1f is performed. That is, as shown in the perspective view of FIG. 5, the take-out mechanism 7 in which the stop position is corrected is lowered to hold the electronic component 2,
Lift up to the specified height. At this time, since the center of gravity G of the electronic component 2 can be accurately held by the take-out mechanism 7, the electronic component 2 can be lifted in a stable state. Then, in this state, an electronic component mounting operation 1g of transferring the electronic component to a predetermined position, for example, onto a substrate to be mounted is performed.

By repeating a series of operations up to this point, the electronic components 2 sequentially conveyed by the taping 1 are taken out from the respective recesses 11. Each electronic component 2 has its own recess 1
The position correction information given from the central processing unit 5 to the take-out mechanism 7 may be different each time because it is stored in the storage position shifted from the position 1, but the position of the take-out mechanism 7 is corrected in this way. Thus, the center of gravity G of each electronic component 2 can be accurately maintained each time. In this embodiment, the electronic component 2 has a substantially rectangular shape in plan view, but the present invention is not limited to such a shape. That is, even when the electronic component 2 having the deviated center of gravity G is taken out, the position of the center of gravity G
Can be reliably held, and stable removal can be performed.

[0014]

As described above, according to the method for taking out an electronic component of the present invention, the following effects can be obtained. That is, even if there is a positioning error of the taping or a displacement of the storage position of the electronic component in the concave portion of the taping, the position of the center of gravity of the electronic component can be reliably held by the takeout mechanism. For this reason, electronic components can be stably held,
It can be reliably transported to a predetermined position. In particular, when a small electronic component is stored in a large recess,
Although the displacement of the storage position of the electronic component increases, the center of gravity position of the electronic component can be reliably maintained even in such a case.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a method for taking out an electronic component according to the present invention.

FIG. 2 is a perspective view illustrating image capture.

FIG. 3 is a diagram showing a detected image.

FIG. 4 is a perspective view illustrating position correction of a take-out mechanism.

FIG. 5 is a perspective view illustrating removal of an electronic component.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Taping 2 Electronic component 3 Optical reading device 4 Monitor 5 Central processing unit 6 Memory 11 Concavity 12 Sprocket hole

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05K 13/02

Claims (1)

(57) [Claims] In a method for taking out electronic components sequentially sent by a transport mechanism by a predetermined take-out mechanism, a camera disposed at a fixed position above the electronic components transported in a state of being stored in a storage container is used. Detecting an image including the reflected light of the electronic component; and, based on the image detected by the camera, a position between a reference position of the detected image and a position of the center of gravity of the electronic component determined from the image of the reflected light of the electronic component. Calculating the displacement; retracting the camera from above the electronic component; moving the takeout mechanism above the center of gravity of the electronic component based on the calculation result of the displacement; Lowering the mechanism and removing the electronic component.