JP2001220011A - Tray holder positioning and driving mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly precisely align ICs in a tray by using a pair of uniaxial actuators connected to both ends of tray holder fro vibrating and tilting the tray holder. SOLUTION: A tray holder positioning and driving mechanism comprises the tray holder 11 provided on a base 1 via an actuator 30, the tray holder 11 being vibrated by the drive of the actuator 30. The actuator 30 consists of first and second uniaxial actuators 20, 21 provided at both ends of the tray holder 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray base positioning drive mechanism, and in particular, a pair of single-axis actuators are arranged at both ends or diagonal positions of a tray base, and rods of one or both single-axis actuators are attached. The present invention relates to a novel improvement for enabling a vibration of the same amplitude to be applied to the entire area of a tray base by allowing the lifting and lowering operation to be freely performed.

[0002]

2. Description of the Related Art Conventionally, for example, a structure shown in FIG. 2 has been adopted as a tray base positioning drive mechanism of this kind which has been used. That is, the receiving body 10 provided on the base 1 is provided with a rotating body 12 provided below the tray base 11 so as to be rotatable. The tray base 11
On the top, a tray 14 for arranging a large number of ICs 13
Is placed.

Next, the operation will be described. First, FIG.
In this state, the rotating body 12 is rotated about the rotation center O by a motor as an actuator (not shown) to tilt the tray base. At this time, the motor rotates while vibrating, and the vibration is given to the tray 14 by accelerating the cycle of the vibration, and the ICs 13 are aligned in the tray 14.

[0004]

Since the conventional tray base positioning drive mechanism is configured as described above, there are the following problems. That is, since the rotating body located at the center of the tray table vibrates, the amplitude of the vibration varies depending on the distance from the center of rotation, and the ICs may not be aligned uniformly. In addition, it is necessary to adjust the height position by raising and lowering the surface of the tray base according to the thickness of the tray, but since the height position of the tray base is fixed,
The height had to be adjusted by a shim (not shown).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, a pair of single-axis actuators are disposed at both ends or diagonal positions of a tray base, and one or both single-axis actuators are provided. An object of the present invention is to provide a tray base positioning drive mechanism in which a rod of an actuator can be freely moved up and down so as to apply vibration of the same amplitude to the entire area of the tray base.

[0006]

A tray base positioning drive mechanism according to the present invention has a tray base provided on a base via an actuator, and the tray base is vibrated by driving the actuator. In the tray base positioning drive mechanism, the actuator is configured by first and second single axis actuators provided at both ends of the tray base, and the tray base is inclined by a stroke difference between the single axis actuators. And a lower portion of the first single-axis actuator is provided on the base via a second shaft support, and a lower portion of each rod of each of the single-axis actuators is provided. Elevation is performed by a drive motor provided in each single-axis actuator, and the same amplitude vibration is applied to the entire area of the tray base. Is obtain as to the configuration, also,
A tray accommodating an IC is placed on the tray base, and both end positions are diagonal positions, and both end positions are located at the center of a short side of the tray base. It is a configuration consisting of positions.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a tray base positioning drive mechanism according to the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals. In FIG. 1, what is indicated by reference numeral 1 is a base on which first and second single-axis actuators 20 and 21 are provided at an interval from each other. The first and second rods 20a, 21a are at diagonal positions 11A, 11A of the tray base 11.
B is connected to the back surface 11c. The actuator 30 is constituted by the single-axis actuators 20 and 21.

The first rod 20a is directly connected to the rear surface 11c, and the second rod 21a is connected to the second rod 21a via a hinge-shaped first shaft support 22 so as to be relatively rotatable. Lower part 20 of the first single axis actuator 20
b is provided so as to be reciprocally rotatable in the direction of arrow A via the hinge-shaped second shaft support portion 23, and each of the rods 20a,
21a is configured to be vertically movable in the directions of arrows B and C by a built-in motor (not shown) through well-known orthogonal transformation means (for example, a rack and a pinion, a nut and a feed screw, etc.). Have been.

On the tray base 11, a large number of ICs 13 are provided.
Is placed on the tray base 11 and is detachably fixed to the tray base 11.

Next, the operation will be described. First, in the configuration of FIG. 1 as the first operation mode, the motors of the single-axis actuators 20 and 21 are simultaneously driven under the same conditions to be moved up and down, that is, moved up and down in the same cycle, so that the tray on the tray base 11 is moved. Since the whole 14 vibrates up and down in the same cycle, each IC 13 in the tray 14 is perfectly aligned.

Next, as a second mode of operation, in the configuration of FIG. 1, the second rod 21a of the second single-axis actuator 21 is raised higher than the first single-axis actuator 20, so that the tray base 11 Since the right side is located higher than the left side, the tray base 11 is greatly inclined toward the left side, and the ICs 13 in the tray 14 are aligned to the left side along two axes in the XY directions. In this case, the first single-axis actuator 20 is tilted to the left via the second shaft support 23 and the tray base 11 is tilted via the first shaft support 22. 1 can be kept fixed. In the case described above, the tray 20 is moved up and down (in this case, fine vibration may be used) by moving the rods 20a and 21a of the single-axis actuators 20 and 21 in the same cycle while the tray base 11 is inclined. Since the table 11 vibrates while being tilted, the ICs 13 in the tray 14 can be aligned with higher accuracy.

Next, as a third operation mode, in the state shown in FIG.
By raising or lowering 0a and 21a in the same stroke, the height of the tray base 11 can be easily adjusted by changing the type of the tray 14, and the laser at the time of laser marking for each IC 13 as a post process. The focus can be adjusted.

In the above case, the single-axis actuators 20 and 21 are connected to the tray base 11 at diagonal positions 11A and 11B.
Is described, but as another form, the central position 11a of each short side 11a, 11b of the tray base 11 is described.
A, each single axis actuator 2 on the back surface 11c of 11bB
The same operation can be obtained when the rods 20a and 21a of 0 and 21 are connected.

Further, as described above, after the alignment of the ICs 13 in the tray 14 is completed through the vibration and the tilting operation of the tray base 11, laser processing for marking the surface of the ICs with a laser beam (not shown) is performed. Done.

[0015]

Since the tray base positioning drive mechanism according to the present invention is configured as described above, the following effects can be obtained. That is, since a pair of single-axis actuators supporting the tray table are provided at diagonal positions of both end positions of the tray table or at the center position of the short side, the vertical movement of the rod of each single-axis actuator moves the inside of the tray. Equal vibration can be given to each IC. In addition, the tray base can be easily inclined by the stroke difference between the single-axis actuators, and in particular, when each single-axis actuator is connected to the diagonal position of the tray base, one of the single-axis actuators can be tilted. By raising the rod and tilting the tray base, it is possible to simultaneously align the ICs in the tray in the X-Y two-axis directions. Also, since the thickness of the tray is different, even when adjusting the laser focal position during laser processing in the subsequent process, the height position of the IC with respect to the laser light source can be freely adjusted only by moving each single axis actuator up and down by the same stroke. Can be adjusted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tray base positioning drive mechanism according to the present invention.

FIG. 2 is a perspective view showing a conventional configuration.

[Explanation of symbols]

 Reference Signs List 1 base 11 tray base 13 IC 14 tray 11A diagonal position 11B diagonal position 11a, 11b short side 11aA, 11bB central position 20, 21 single-axis actuator 23 second shaft support 20a, 21a rod

Claims (7)

[Claims] A tray (11) provided on a base (1) via an actuator (30);
In the tray base positioning drive mechanism configured to vibrate the tray base (11) by driving the (30), the actuator (30) includes first and second units provided at both ends of the tray base (11). A tray base positioning drive mechanism comprising a shaft actuator (20, 21). 2. The tray base positioning drive mechanism according to claim 1, wherein said tray base (11) is inclined by a stroke difference between said single axis actuators (20, 21). 3. The base (1) according to claim 1, wherein a lower portion of the first single-axis actuator (20) is provided on the base (1) via a second shaft support (23). Tray base positioning drive mechanism. 4. The lifting and lowering of each rod (20a, 21a) of each single-axis actuator (20, 21) is performed by each single-axis actuator (2
4. The apparatus according to claim 1, wherein the drive is performed by a drive motor provided in the first and second trays, and the same amplitude is applied to the entire area of the tray base. The tray base positioning drive mechanism described in the above. 5. The tray table according to claim 1, wherein a tray (14) containing an IC (13) is mounted on the tray table (11). Positioning drive mechanism. 6. The tray base positioning drive mechanism according to claim 1, wherein the both end positions are diagonal positions (11A, 11B). 7. The apparatus according to claim 1, wherein the both end positions are formed by central positions (11aA, 11bB) of short sides (11a, 11b) of the tray base (11). Tray base positioning drive mechanism.