JPH0578960B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a chuck for inserting electronic components into a circuit board.

(b) Conventional technology When inserting a so-called radial lead type electronic component, which has multiple leads (often a pair of left and right leads) protruding from the bottom surface, into a circuit board, the leads must be grasped and aligned with the holes in the board. A chuck is often used in which the component body is pressed from above and the lead is inserted into the hole. Examples of such checks are given in Japanese Patent Publications No. 55-20399, No. 55-37114, and No. 55.
This can be seen in JP-A-51358 and JP-A-58-9595. In these examples, the clamping pieces that support the leads hang down so as to face the component body and the flat side surfaces (this will be referred to as the front or rear surface), but in order to increase the insertion density, it is necessary to It may be better to let the clamping pieces hang down. An example of such a configuration can be found in Japanese Patent Publication No. 60-24597. However, in this example, in order to pull the tip of the clamping piece away from the lead inserted into the board, you can either open the clamping piece wide and pull it up so as to skim the front and rear surfaces of the component body, or you can separate the lead and pull the chuck. It was often difficult to use it on boards with densely packed components, as it had to be moved left and right and pulled up from there.

(c) Problems to be Solved by the Invention The present invention aims to provide a chuck, which uses an arm portion to grasp a component lead and align it to a hole in a board, with a structure that does not impede dense planting as much as possible.

(d) Means for Solving the Problems The chuck of the present invention has a first arm that is swung by an actuator and a second arm that is swung parallel to the first arm. The second arm is provided with a component lead clamping finger that opens and closes in a direction perpendicular to its swing plane. The second arm is associated with the first arm by an engagement piece and the finger by a cam.

(e) Action After inserting the component leads into the holes on the board, the first
When the arm is swung, a cam attached to it first opens the finger. Then the first arm and the second
The arms enter engagement, causing the fingers to swing in a plane perpendicular to their opening. Like this 2
By applying successive directional movements to the fingers, the fingers can be pulled out of the underside of the part with relatively small movements.

(F) Embodiment In the figure, 1 is an electronic component with a pair of left and right leads 2 protruding from the bottom surface, and 3 is a circuit board having a hole 4 for inserting the leads. Reference numeral 10 denotes a chuck for inserting electronic components, and the chuck body 11 is fixed to the lower end of a shaft 12. The shaft 12 is supported by a robot hand (not shown) and provides the chuck body 11 with movement in a three-dimensional space and rotation around a vertical axis. A pair of symmetrical first arms 13 are pivotally supported on the chuck body 11 so as to be able to swing about a shaft 14 in a vertical swing plane. The first arms 13 are biased by a spring 15 in a direction in which their upper ends approach each other and their lower ends move away from each other. The actuator 16 moves the first arm 13 energized in this way in the opposite direction. Actuator 16
is a piston-shaped member inserted into an annular cylinder chamber 17 formed in the chuck body 11,
It is normally pushed upward by the spring 18, and falls when compressed air flows into the upper part of the cylinder chamber 17 (air piping is omitted). The lower end of the actuator 16 is a tapered cam 19,
The roller 20 at the upper end of the first arm 13 contacts this. When the actuator 16 descends, the first arms 13 swing in a direction in which their lower ends approach each other, and when the actuator 16 ascends, they return to their original positions. That is, by moving the actuator 16 up and down, the first arm 13 opens and closes within a vertical swing plane.

21 is connected by a common shaft 14 with the first arm 13,
A pair of second arms are pivotally supported adjacent to the first arm 13. Like the first arm 13, this one is also symmetrical. A spring 22 is inserted between the second arm 21 and the first arm 13 adjacent thereto, so that the second arm 21 moves away from the first arm 13, that is, the first arm 1
3 as a reference, they are energized in the direction of closing their lower ends together. Naturally, the second
The swing plane of the arm 21 is parallel to that of the first arm 13. At the lower end of the second arm 21, a pair of component lead clamp fingers 23 are attached to a shaft 2 so as to swing within a plane perpendicular to the swing plane of the second arm itself.
It is supported by 4. A spring 25 is inserted between each pair of fingers 23, as shown in FIG. 4, and biases the fingers 23 in a direction in which the clamping portions 26 at their tips move away from each other. Note that this clamping portion 26 is provided with a V-shaped notch for taking in the component lead 2, so that the component lead 2 can be positioned reliably.

An engagement piece 27 projects from the lower end of the first arm 13 . The engaging piece 27 extends toward the center of the chuck through a window 28 formed in the adjacent second arm 21. The finger 23 may be pivoted in a slot provided in the second arm 21, but
The top end can be seen through this window 28. At the upper end of the finger 23 there is a roller 29 that rotates about a vertical axis, and the engagement piece 27 penetrates between the rollers 29. A tapered cam 30 is formed in this punch-through portion. Further, at the tip of the engaging piece 27, there is a pin 31 that engages with the roller 29.
is driven horizontally.

32 is a shaft 3 passing through the center of the chuck body 11
3 is a pusher that is moved up and down; 34 is a positioning bolt that is screwed into the chuck body 11 and serves as a stopper in the opening direction of the first arm 13; and 35 is a positioning bolt that is also screwed into the chuck body 11 and serves as a stopper in the closing direction of the second arm 21. This is a positioning bolt that acts as a stopper.

Chuck 10 operates as follows. In Figure 1, the chuck 10 connects the tip of the component lead 2 to the circuit board 3.
This shows what it looks like when inserted into hole 4. At this time, the actuator 16 is in a lowered state due to air pressure, and the cam 19 widens the gap between the rollers 20 and moves to the first position.
The lower end of the arm 13 is closed. The second arm 21 is also pushed in the closing direction by the spring 22 and stops at the point where the upper end hits the positioning bolt 35. Since there is no such stopper for the first arm 13, the first arm 13 is still trying to move in the closing direction, and the cam 30 formed on the engagement piece 27 continues to apply pressure to the roller 29 of the finger 23. (See Figure 6). Therefore, the clamping pressure continues to be applied to the lead 2. When the air pressure is released and the actuator 16 is raised, the first arm 13 swings in the opening direction, but since the spring 22 applies a repulsive force against the first arm 13, the second arm 21 does not move. A relative movement will occur between the first arm 13 and the first arm 13. Therefore, as shown in FIG.
The gap between the upper ends of the fingers 23 narrows as the fingers 23 come out of the gap, and the clamping portion 26 opens to release the lead 2. The pin 31 then engages the roller 29,
The second arm 21 follows the first arm 13 and moves in the opening direction. The first arm 13 is the positioning bolt 3
4 and stop. This is the point where the clamping portion 26 has just come out from under the component 1. Then, as shown in FIG. 2, the pusher 32 descends and pushes the lead 2 deep into the hole 4.

When holding lead 2, the movement is the opposite. That is, the second arm 21 is pushed in the closing direction while keeping the finger 23 open, and when the clamping portion 26 is positioned outside the lead 2, the second arm 21 stops, and then the finger 23 is closed.

(g) Effects of the Invention In the configuration of the present invention, the fingers that sandwich the component lead and the second arm that supports them are swung in directions perpendicular to each other to separate them from the component, so a relatively small movement is required. The parts can be evacuated,
Suitable for use in densely planted substrates. Furthermore, since a single actuator is used to open and close the fingers and swing the second arm, the configuration is simplified and the reliability is high.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and FIGS.
The figures are cross-sectional views showing different operating conditions, and Figure 3 is the first
Figure 4 is a cross-sectional view taken from the same direction as Figure 3, with the cross-sectional position slightly changed; Figure 5 is the same position as Figure 4, but with a different operating state. The cross-sectional views of FIGS. 6 to 8 are cross-sections taken along the arrow positions in FIG. 4, and show different operating states. 1...Electronic component, 2...Lead, 3...Circuit board, 10...Chuck for inserting electronic component, 11...
Chuck body, 13...first arm, 16...actuator, 21...second arm, 27...engaging piece, 23...finger, 30...cam.

Claims (1)

[Scope of Claims] 1. A chuck main body, a pair of first arms pivotally supported on the main body so as to be able to swing within a vertical swinging plane, and opening and closing of the pair of first arms within the swinging plane. a pair of second arms that are adjacent to the first arm and pivoted so as to be able to swing in parallel thereto, and that are biased in the closing direction with respect to the adjacent first arm; When one arm starts to move in the opening direction and a predetermined angle change occurs between it and the adjacent second arm, the first and second arms are connected and the second arm is moved to the first arm.
an engaging piece that follows the arm; a pair of component lead clamping fingers provided on each second arm so as to open and close in a direction perpendicular to the swinging plane of the arm; and a first arm that is connected to the finger. When the first arm and the second arm are both in the closed position, the fingers are in the reed clamping position, and the first
A chuck for inserting an electronic component, comprising a cam that shifts the finger to a lead release position when the arm moves in the opening direction and an angle change occurs between the finger and the second arm.