JP2832261B2 - Lead frame supply device and lead frame supply method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead frame supply apparatus and a lead frame supply method, and more particularly to a lead frame supply apparatus and a lead frame supply apparatus which sucks and transports stacked lead frames one by one from above. About the method.

[0002]

2. Description of the Related Art As shown in FIG. 3, a lead frame supply apparatus and a lead frame supply method according to the prior art are shown in FIG.
Flange 12 of suction block 10 supported by column 15
Is fixed to the suction pipe 10, and the suction pipe 10 is connected to the pipe section 14 so that the suction pressure is reduced to a negative pressure.
Holes 11 reaching the bottom surface of the suction block 10 are formed at a plurality of locations.

In the operation, the suction block 10 is first lowered by power (not shown) connected to the column 15, and the bottom surface of the suction block 10 is brought into contact with the surface of the uppermost lead frame 7 of the stacked lead frames. After that, the internal pressure of the pipe portion 14 is reduced to a negative pressure, whereby the hole portion 11 is also set to a negative pressure, and only the uppermost lead frame 7 is sucked at each surface portion thereof,
Thereafter, the suction block 10 is moved up by the power coupled to the column 15 and moved to move the lead frames one by one to a predetermined position.

[0004]

In this prior art, when the lead frame at the uppermost stage of the laminated lead frame and the lead frame at the next stage are in close contact with each other, it is difficult to reliably supply them one by one. Supplying two sheets at the same time to the next process that requires supply of one sheet at a time may cause a problem. Problem.

[0005]

SUMMARY OF THE INVENTION A feature of the present invention is that a holding plate, a plurality of shafts which penetrate the holding plate and are movable in a direction perpendicular to the holding plate and arranged in one direction , A suction portion attached to each tip of the shaft portion on one side of the holding plate, and a pipe portion each attached to a portion of the shaft portion on the other side of the holding plate and guiding suction force by negative pressure. A plurality of spring portions for applying an acting force to each of the suction portions in a direction away from the holding plate, whereby the suction portions attached to the plurality of shaft portions independently from each other together with the shaft portions. adsorbed said to allow vertical movement, when the plurality of suction portion is not in contact with the object
Distance from the retaining portion of the part from one side of said one direction
A lead frame supply device provided with a lead frame suction transfer unit sequentially increasing or decreasing toward the other side .

Another feature of the present invention is that in a method of sucking and transporting a plurality of stacked and horizontally placed lead frames one by one from above, a holding plate; Movable in the direction perpendicular to the plate and one side
A plurality of shafts arranged in a direction, and a suction unit attached to a tip of each of the shafts on one side of the holding plate,
A pipe portion that is attached to the shaft portion on the other side of the holding plate and guides suction force by negative pressure, and a plurality of spring portions that apply an acting force in a direction away from the holding plate to each of the suction portions. have, adsorbed thereby said suction portion attached to a plurality of shaft portion to allow movement of the vertical directions independently of one another together with the shaft portion, when the plurality of suction portion is not in contact with the object from one side of the distance of the first direction from the holding portion of the section toward the other side of the
Using a lead frame suction transfer unit that is sequentially increasing or decreasing , the suction unit is lowered and the holding unit is lowered while keeping the holding unit in a horizontal state. Suction, and thereafter, the holding unit is raised while keeping it in a horizontal state, and the uppermost lead frame is sequentially moved from a position where the distance from the holding plate is short when the suction unit is not in contact with an object. Is lifted upward, thereby separating the lead frame of the next stage from the lead frame of the next stage.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing a lead frame suction transfer unit in a lead frame supply device according to one embodiment of the present invention.

[0008] A cylindrical (cylindrical) shaft portion 2 which is vertically movable through a horizontally placed holding plate 6
The suction pad 1 is attached as a suction portion to each tip of the shaft 2 below the holding plate, and the suction force due to the negative pressure (reduced pressure) is applied to the portion of the shaft 2 above the holding plate. A guiding pipe portion 4 is attached, and a ring 5 is fitted to the shaft portion 2. A force is applied between the ring portion 5 and the holding plate in a direction away from the holding plate, that is, in a downward direction, and the suction pad 1 is always held. A coil spring 3 is provided for urging away from the plate. With such a structure, the suction pad 1 attached to the plurality of shaft portions 2 can independently move in the vertical direction along with the shaft portions 2. In the state of FIG. 1 in which the suction pad 1 is not in contact with the lower stacked lead frame 7,
The distance L1 of the left suction pad 1 from the holding plate 6 in FIG. 1 is larger than the distance L2 of the center suction pad 1 from the holding plate 6, and the distance L2 of the center suction pad 1 from the holding plate 6 is the right suction. It is larger than the distance L3 of the pad 1 from the holding plate 6, and the relationship is L1>L2> L3.

FIG. 2 is an operation explanatory diagram showing the operation sequence of the lead frame suction method in the lead frame supply method according to one embodiment of the present invention. Since the method shown in FIG. 2 uses the apparatus shown in FIG. 1, parts having the same functions as those in FIG. 1 are denoted by the same reference numerals in FIG.

FIG. 2A shows an initial state, in which the height L, which is different from each other, differs from each other from the holding plate 6.
In order to suction the lead frame at the uppermost stage of the lead frame 7 on which the lead frame suction transfer unit including the plurality of suction pads 1 having L1, L2 and L3 is stacked,
It is a figure showing a state where it is lowered (in the direction of the arrow) by a power mechanism (not shown) coupled to the holding plate.

FIG. 2 (b) shows a plurality of suction pads 1 of the lead frame suction and transfer unit contacting respective locations on the surface of the uppermost lead frame 7, and the suction force due to the negative pressure (reduced pressure) through the pipe portion 4. FIG. 5 is a view showing a state where the liquid is adsorbed in FIG.

FIG. 2C shows the uppermost lead frame 7.
After the suction, the lead frame suction transfer unit is raised (in the direction of the arrow) so that the uppermost lead frame is moved from the next lead frame to the end because the suction pads 1 have different heights. FIG. 5 is a diagram showing a state where the sheet is peeled off from the part side surface. That is, since the relationship of L1>L2> L3 is satisfied, the right side is the highest state from the lead frame, and therefore, it is sequentially peeled from the right side as shown in the drawing.

[0013]

As described above, according to the present invention, even when the laminated lead frames are in close contact with each other, the uppermost lead frame can be separated from the one end side surface, so This has the effect that lead frames can be supplied one by one.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a lead frame suction and transfer unit in a lead frame supply device according to one embodiment of the present invention.

FIG. 2 is an operation explanatory diagram showing an operation order of a lead frame suction method in a lead frame supply method according to one embodiment of the present invention;

FIG. 3 is a perspective view schematically showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suction pad 2 Shaft part 3 Coil spring 4 Piping part 5 Ring 6 Holding plate 7 Lead frame 10 Suction block 11 Hole part 12 Flange 14 Piping part 15 Prop

Claims (2)

(57) [Claims] 1. A holding plate, a plurality of shafts penetrating through the holding plate and movable in a direction perpendicular to the holding plate and arranged in one direction, and one of the holding plates A suction part attached to each tip of the shaft part on the side; a pipe part attached to a part of the shaft part on the other side of the holding plate for guiding suction force by negative pressure; and each suction part A plurality of spring portions that apply an acting force in a direction away from the holding plate, whereby the suction portion attached to the plurality of shaft portions independently moves in the vertical direction along with the shaft portions. When the plurality of suction units are not in contact with an object, the distance of the suction unit from the holding unit is one.
Increase gradually from one side of the direction to the other
Is a lead frame supply device provided with a lead frame suction / transfer unit. 2. A method of adsorbing and transporting a plurality of stacked and horizontally placed lead frames one by one from above, wherein the holding plate and a vertically extending movement of the holding plate penetrate the holding plate. A plurality of shafts that are possible and are arranged in one direction, a suction unit attached to each tip of the shaft on one side of the holding plate, and the shaft on the other side of the holding plate And a plurality of spring portions for applying an acting force in a direction away from the holding plate to each of the suction portions, whereby the plurality of shaft portions are provided. The suction unit attached to the base unit can independently move in the vertical direction together with the shaft unit, and when the plurality of suction units are not in contact with an object, the distance of the suction unit from the holding unit is one. direction
Sequentially increase or decrease from one side of the
Using a small lead frame suction transfer unit, the suction unit is lowered and the holding unit is lowered while maintaining the horizontal state, and the plurality of suction units suction each part of the uppermost lead frame. After that, the holding unit is lifted while being held in a horizontal state, and when not in contact with an object, the topmost lead frame is sequentially lifted upward from a position where the distance from the holding plate is short to the suction unit. A method for supplying a lead frame, wherein the uppermost lead frame is transported by being separated from the next lead frame.