JP4087527B2 - Electronic parts transfer device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic component transport device, and more particularly, to an electronic component transport device that transports electronic components on a tray stored in a stacked manner in a tray stocker to a predetermined position.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a transport device (QFP handler) that automatically transports an electronic component such as a QFP (Quad Flat Package) IC for inspection is known.
FIG. 7 is a plan view showing the configuration of such a transport apparatus. The loading tray stocker 1 stores a tray on which a large number of ICs to be inspected are placed.
The XY arm 2 lifts the two ICs on the tray by vacuum suction and conveys them onto the hot plate 3 or the feeding stage 4. The XY arm 2 transports the IC onto a hot plate 3 having a heater for heating the IC when a high temperature test of the IC is performed, and transports the IC onto the feeding stage 4 in other cases.
[0003]
Subsequently, the XY arm 5 lifts the IC on the hot plate 3 or the feeding stage 4 by vacuum suction and transports it onto the test carriers 6a and 6c. Since the test carriers 6a and 6c are used alternately, the XY arm 5 conveys the IC to the vacant test carrier.
[0004]
Next, a test head (not shown) lifts the two ICs on the test carriers 6 a and 6 c by vacuum suction and conveys them onto the test station 7.
An automatic inspection device (not shown) performs an electrical inspection on the IC on the test station 7.
After the inspection is completed, the test head conveys the IC to the test carriers 6b and 6d.
[0005]
Next, the XY arm 8 sucks and lifts up two ICs on the test carriers 6 b and 6 d that have been inspected, and conveys them onto the sorting idle stage 9. By placing the IC once on the sorting idle stage 9, the heated IC is cooled here.
The XY arm 10 sucks and lifts up two ICs on the sorting idle stage 9 and conveys them onto a tray stored in the tray stocker 11.
The above operation is repeated until there is no more IC on the tray stored in the loading tray stocker 1.
[0006]
In the transport apparatus of FIG. 7, a resin tray on which an IC to be inspected is mounted has a shape as shown in FIG. FIG. 8A is a plan view of the tray, and FIG. 8B is a side view of the tray. In FIG. 8, 18 is a tray, 19 is a notch provided at the four corners of the tray 18, and 20 is an IC placed on the tray 18.
The tray 18 on which a large number of ICs 20 are mounted is stored in a stacking manner in the loading tray stocker 1 as shown in FIG. 8C, and the IC 20 is transported to the test station 7 from the uppermost tray 18. Implemented sequentially. Then, the uppermost tray 18 in which the IC is emptied is transported to the tray stocker 12, and after this transport, the transport of the IC 20 from the second tray 18 to the test station 7 is started.
[0007]
[Problems to be solved by the invention]
In the transport apparatus as described above, the uppermost tray 18 with the empty IC 20 is separated from the other trays 18 and transferred to the tray stocker 12. The uppermost tray 18 and the lower tray 18 are separated by inserting a sheet-like member.
However, when a plurality of trays 18 are stacked in the loading tray stocker 1, the uppermost tray 18 is mounted inclined with respect to the horizontal plane due to the warpage of each tray 18 and its accumulated error. When this inclination is large, there is a problem that when the uppermost tray 18 is separated, the hook-shaped member for cutting does not enter the notch 19 and a picking error occurs. In the conventional transport device, there is no good way to deal with such a problem, and a staff member of the transport device selects and uses the tray 18 with less warping.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electronic component transport device that can reliably take out an empty tray even if the tray is warped.
[0008]
[Means for Solving the Problems]
The electronic component transport device according to the present invention includes a tray stocker (1) for storing a tray (18) on which a plurality of electronic components are placed. The tray stocker includes a stocker base (22) for mounting a plurality of stacked trays, an elevating mechanism for raising and lowering the stocker base, and four corners of the tray for separating and taking out the uppermost tray from the plurality of trays. And four nail units (24) that are slidable in the vertical direction and are arranged at positions facing each other. Each nail unit has a first hook-like member (31a) that locks the upper edge of the uppermost tray with a hook-shaped tip, and the lower edge of the uppermost tray is locked with a hook-shaped tip. a second hook-like member (31b), and means for applying a downward force at all times to the first, second hooked member to drive the first, second hooked member, said first the release of the engagement and locking by the hook-like member, and a second independently performed the release of the engagement and locking by the hook-like member driving mechanism (42a, 42b). The lifting mechanism moves to a locking position where the first hook-shaped member locks the uppermost tray and the second hook-shaped member does not lock the uppermost tray. When the stocker base is moved, the stocker base is raised to a position where all the first hook-like members on the uppermost tray are lifted, and the first hook-like member is raised in a state where the stocker base is raised. there when the second hook-like member be in the locking position is moved to the locking position for locking the uppermost tray, the first hook-like member of the leading end portion and the second hook-like member The distance in the vertical direction of the front end is equal to the thickness of one tray.
[0009]
Further, Example 1 construction of the transport device of the electronic component described above, the control device includes a (51) for controlling the transport of the electronic component, the control unit controls the drive mechanism, locking the uppermost tray moves the first hook-like member to a locking position for, moving the second hook-like member to the locking release position not engaging the uppermost tray, to control the elevating mechanism wherein after raising the Sutokkabesu, the Sutokkabesu stopped when all of the first hook-like member applied with this rise uppermost tray is lifted to a position higher than the initial time, the by controlling the drive mechanism, the said first hook-like member is moved to the unlocked position the second hook-like member after moving to the locking position, said by controlling the lifting mechanism Sutokkabesu Lower the electronic components on the uppermost tray Feed, but repeated after transporting finished, to retrieve the uppermost tray from the stocker for each tray in the stocker.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing a configuration of a loading tray stocker of a transport apparatus according to an embodiment of the present invention.
The loading tray stocker 1 includes a guide plate 21 serving as a side wall of the stocker 1, a stocker base 22 on which the tray 18 (one-dot chain line in FIG. 1) is mounted, a front plate 23 serving as a front cover of the stocker 1, and a guide plate 21. Four nail units 24 fixed to the front plate 23, and a sensor 25 fixed to the front plate 23.
[0011]
Below the stocker base 22, an elevating mechanism (not shown) for raising or lowering the stocker base 22 is provided.
The front plate 23 provided with a hinge mechanism (not shown) can be tilted forward (right side in FIG. 1). Thus, the tray 18 can be placed on the stocker base 22 by opening the front plate 23.
The sensor 25 is an optical sensor that detects whether or not the uppermost tray 18 in the stocker 1 has reached a predetermined position.
[0012]
2A is a front view of the nail unit 24 viewed from the outside of the stocker 1, FIG. 2B is a partially broken rear view of the nail unit 24 viewed from the inside of the stocker 1, and FIG. 2 (a) is a perspective view of the inside of a slider, which will be described later, FIG. 3 (b) is a side view of the nail unit 24, and FIG. 3 (c) is a side view of a hook-like member described later.
[0013]
The nail unit 24 includes a first hook-shaped member 31a that locks the upper edge of the uppermost tray 18 in the stocker 1 with a hook-shaped tip, and a lower edge (notch 19) of the uppermost tray 18. And a second hook-shaped member 31b that is locked by the hook-shaped tip.
The slide base 32 is fixed to the guide plate 21. The slider 33 can slide in the vertical direction along the guide mechanism 34.
[0014]
One end of a spring 36 is hooked on the spring hook 35 fixed to the slider 33, and the other end of the spring 36 is fixed to the guide plate 21. As a result, a downward force is always applied to the slider 33. However, the downward movement of the slider 33 is limited by a stopper 37 fixed to the slide base 32.
[0015]
The bearings 38 a and 38 b are mounted in the through holes 45 of the first flange-shaped member 31 a and the second flange-shaped member 31 b, and the center shaft 39 inserted through the bearings 38 a and 38 b is fixed to the slider 33. Yes. Thereby, the first hook-shaped member 31a and the second hook-shaped member 31b are rotatably supported by the slider 33 with the center shaft 39 as the rotation axis.
[0016]
Further, when the first hook-shaped member 31a and the second hook-shaped member 31b are both in the locking position (the state shown in FIG. 3B), the vertical distance D of each tip portion is 1 of the tray 18. The length is set to be equal to the thickness of the sheet. Since the first hook-shaped member 31a is hooked on the upper edge of the tray 18 and the second hook-shaped member 31b is inserted into the notch 19, the above-mentioned distance D is slightly larger than the thickness of one tray 18. It can be short.
[0017]
On the other hand, one end of the shaft 40a is rotatably attached to the through hole 46 of the first hook-shaped member 31a. Similarly, one end of the shaft 40b is inserted into the through hole 46 of the second hook-shaped member 31b. It is attached so that it can rotate freely. A bearing 41a is inserted through the multiple ends of the shaft 40a, and a bearing 41b is inserted through the multiple ends of the shaft 40b.
The bearing 41a is attached to the head block 43a that is raised or lowered by the air cylinder 42a, and the bearing 41b is attached to the head block 43b that is raised or lowered by the air cylinder 42b.
[0018]
Thus, when the air cylinder 42a raises the head block 43a, the first flange-shaped member 31a rotates in the direction of A in FIG. 3C with the center shaft 39 passing through the through hole 45 as the rotation axis.
On the contrary, when the air cylinder 42a lowers the head block 43a, the first flange-shaped member 31a rotates in the direction B in FIG.
[0019]
Similarly, when the air cylinder 42b raises the head block 43b, the second bowl-shaped member 31b rotates in the direction A with the center shaft 39 as the rotation axis, and when the air cylinder 42b lowers the head block 43b, It rotates in the direction B with the center shaft 39 as a rotation axis.
The upward movement of the head blocks 43 a and 43 b is limited by a stopper plate 44 fixed to the slider 33. Therefore, the first hook-shaped member 31a and the second hook-shaped member 31b do not rotate further to the A side than the position shown in FIG.
[0020]
Next, the operation of the transport apparatus according to the present embodiment will be described focusing on the operation of the loading tray stocker 1. FIG. 4 is a block diagram of a control device for controlling the transport device of the present embodiment, FIG. 5 is a flowchart for explaining the operation of the transport device, and FIG. 6 is a diagram of the first and second hook-shaped members 31a and 31b. It is a figure which shows operation | movement. In FIG. 4, only the mechanism related to the loading tray stocker 1 is shown.
[0021]
First, the control device 51 controls the air cylinder 42a to move the first hook-shaped member 31a to the locking position shown in FIG. The cylinder 42b is controlled to move the second hook-shaped member 31b to the unlocking position shown in FIG. 6A (hereinafter, this state is referred to as OFF) (step 101 in FIG. 5).
[0022]
Subsequently, the control device 51 controls the elevating mechanism 52 to raise the stocker base 22 (step 102).
The sensor 25 detects whether or not the uppermost tray 18 among the trays 18 stacked on the stocker base 22 has reached a predetermined position. When the uppermost tray 18 reaches a predetermined position by the detection of the sensor 25 (step 103: YES), the control device 51 stops the raising of the stocker base 22 (step 104).
[0023]
When the stocker base 22 further rises from the time when the first hook-shaped member 31a contacts the upper edge of the uppermost tray 18, the first hook-shaped member 31a is lifted upward as the slider 33 slides (see FIG. 6 (b)).
The predetermined position described above is set to a position where all the hook-shaped members 31a are higher than the initial position (the state shown in FIG. 6A).
[0024]
Next, the control device 51 controls the air cylinder 42b to move the second hook-shaped member 31b to the locking position as shown in FIG. 6C (step 105). At this time, the first hook-shaped member 31a remains in the locking position.
Since the vertical distance D of the first and second hook-shaped members 31a and 31b at this locking position is the thickness of one tray 18, the second hook-shaped member 31b that moves to the locking position is The uppermost tray 18 is surely inserted into the notch 19.
[0025]
Subsequently, the control device 51 controls the air cylinder 42a to move the first hook-like member 31a to the unlocking position as shown in FIG. 6D (step 106). The second hook-shaped member 31b remains in the locked position.
And the control apparatus 51 controls the raising / lowering mechanism 52, and lowers the stocker base 22 (step 107). In this way, the uppermost tray 18 locked by the second hook-shaped member 31b is separated from the lower tray 18.
[0026]
Next, the control device 51 controls the XY arm 2 to transport the IC on the uppermost tray 18 onto the hot plate 3 or the feeding stage 4 (step 108). The IC conveyance is repeated until there is no more IC on the uppermost tray 18 (step 109).
When the uppermost tray 18 becomes empty, the control device 51 controls the tray transport mechanism 53 to transport the uppermost tray 18 to the tray stocker 12 as shown in FIG. 6F (step 110). The above operation is performed for all trays 18 stored in the loading tray stocker 1.
[0027]
【The invention's effect】
According to the present invention, the nail unit is provided in the tray stocker, the first and second hook-like members are provided in the nail unit, and the leading end portion of the first hook-like member and the second hook when in the locking position. By making the vertical distance of the front end of the bowl-shaped member equal to the thickness of one tray, the second bowl-shaped member can be surely inserted into the lower edge of the uppermost tray, and warps each tray. Even if there is, the uppermost tray and the lower tray can be reliably separated and only the uppermost tray can be taken out.
[Brief description of the drawings]
FIG. 1 is a plan view showing a configuration of a loading tray stocker of a transport apparatus according to an embodiment of the present invention.
FIGS. 2A and 2B are a front view and a rear view of the nail unit of FIG.
3 is a front view and a side view of the nail unit of FIG. 1 and a side view of a bowl-shaped member. FIG.
FIG. 4 is a block diagram of a control device that controls the transport device.
FIG. 5 is a flowchart for explaining the operation of the transport device.
FIG. 6 is a view showing the operation of the first and second hook-shaped members.
FIG. 7 is a plan view showing a configuration of an electronic component transport device.
FIG. 8 is a plan view and a side view of a tray.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Loading tray stocker 2, 5, 8, 10 ... XY arm, 3 ... Hot plate, 4 ... Feeding stage, 6a, 6b, 6c, 6d ... Test carrier, 7 ... Test station, 9 ... Sorting idle stage, DESCRIPTION OF SYMBOLS 11, 12 ... Tray stocker, 18 ... Tray, 19 ... Notch, 20 ... IC, 21 ... Guide plate, 22 ... Stocker base, 23 ... Front plate, 24 ... Nail unit, 25 ... Sensor, 31a ... First cage 32b, second base member, 32 ... slide base, 33 ... slider, 34 ... guide mechanism, 35 ... spring hook, 36 ... spring, 37 ... stopper, 38a, 38b, 41a, 41b ... bearing, 39 ... Center shaft, 40a, 40b ... Shaft, 42a, 42b ... Air cylinder, 43a 43 b ... head block, 44 ... stopper plate, 51 ... controller, 52 ... lift mechanism, 53 ... tray transporting mechanism.

Claims (2)

An electronic component transport apparatus comprising a tray stocker for storing a tray on which a plurality of electronic components are placed, and transporting the electronic components on the tray to a predetermined position,
The tray stocker has a stocker base on which a plurality of stacked trays are mounted;
An elevating mechanism for elevating and lowering the stocker base;
Four nail units that are slidable in the vertical direction and are arranged at positions opposed to the four corners of the tray to separate and take out the uppermost tray from the plurality of trays;
Each nail unit includes a first hook-shaped member that locks the upper edge of the uppermost tray with a hook-shaped tip,
A second hook-shaped member that locks the lower edge of the uppermost tray with a hook-shaped tip;
Means for constantly applying a downward force to the first and second hook-shaped members;
The first, the second hook-like member is driven, perform the first release of the locking and the locking by the hook-like member, independently of the release of the engagement and locking by the second hook-like member A drive mechanism,
The elevating mechanism moves to a lock position where the first hook-shaped member locks the uppermost tray and moves to a lock release position where the second hook-shaped member does not lock the uppermost tray. The stocker base is raised to a position where all the first bowl-shaped members hanging on the uppermost tray are lifted,
When the first hook-shaped member is in the locking position and the second hook-shaped member is moved to the locking position for locking the uppermost tray with the stocker base raised , An electronic component transport apparatus, wherein a distance in a vertical direction between a front end portion of the bowl-shaped member and a front end portion of the second bowl-shaped member is equal to a thickness of one tray. In the electronic component conveying apparatus according to claim 1,
A control device for controlling the conveyance of electronic components
The controller controls the drive mechanism moves the first hook-like member to a locking position for locking the uppermost tray, the unlocking does not lock the uppermost tray moving the second hook-like member in position, after raising the Sutokkabesu by controlling the lifting mechanism, all of the first hook-like member applied to the uppermost tray in accordance with this increase initial time the Sutokkabesu was stopped when the lifted position higher than, and controlling the drive mechanism, the first hook-like member said second hook-like member after moving to the locking position Is moved to the lock release position, the lifting mechanism is controlled to lower the stocker base, and the electronic components on the uppermost tray are transported. After transporting, the uppermost tray is taken out from the tray stocker. That each in the tray stocker Conveying apparatus of electronic components, characterized in that those repeated for Rei.

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