JPH0639518Y2 - Positioning mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a positioning mechanism suitable for mounting an object to be positioned, for example, a printed circuit board of an electronic device at the time of automatic insertion, or for transporting the printed circuit board. Is.

[Conventional technology]

According to the printed wiring assembly drawing of the electronic device, the work of inserting and fixing the lead wires of the electronic parts of the specified type and performance into the lead wire insertion holes whose positions are specified by the printed wiring pattern of the printed circuit board is being automated. . For example, there is a method in which a printed circuit board placed on an XY table is moved and parts of different types are sequentially inserted in a specified order. The parts to be inserted here are taping parts and DIP type parts. At this time, in many cases, the method of positioning the printed circuit board on the XY table is to press the taper pin against the round hole of the printed circuit board.

[Problems to be solved]

The applicant of the present application has developed an electronic component insertion machine that moves and positions a printed circuit board only in the x-axis direction and moves and positions an insertion machine including an insertion head and a clinch head in the y-axis direction. Here, it has been required to develop a positioning mechanism for a printed circuit board that moves and positions only in the x-axis direction.

Moreover, in the above machine, the conventional positioning method cannot be adopted because the printed circuit board itself moves while sliding on the rails.

In view of this, the present invention has an object to provide a positioning mechanism for an object to be positioned such as a printed circuit board, which can surely position the printed circuit board in response to such a request and can be quickly moved in the y-axis direction. is there.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention attaches a main body arm that rotates with the rotation of the shaft to a rotatable shaft provided on a movable body that can move in a predetermined direction, and is held by the main body arm. A positioning arm rotatably attached to the shaft and having a through hole formed at the tip through which the positioning pin is loosely inserted is urged so that the tip faces downward, and the body arm is inserted into the through hole of the positioning arm. Insert a positioning pin that has a pin that fits into the pin groove formed at the tip of the, and form a protrusion that contacts the printed circuit board or rail on the lower surface of the positioning pin, and turn the shaft to face the object to be positioned. Rotate the main body arm, push down the pin that fits into the pin groove by the main body arm after the protrusion of the positioning arm contacts the traveling plate rail, etc. It is obtained by adapted to be inserted into the positioning hole of the vertical object positioning thereof relative to the positioning thereof.

[Action]

In this invention, when the shaft is rotated, the main body arm is also rotated, and the tip of the positioning arm attached to the main body arm is also rotated toward the object to be positioned such as a printed circuit board. Before the positioning pin fits into the positioning hole of the object to be positioned such as a printed circuit board, the tip of the positioning pin does not protrude from the bottom surface of the insertion hole because the pin fits into the pin groove, and the body arm rotates. When the protrusion of the positioning arm collides with the rail on which the moving body travels, the main body arm further rotates and pushes down the pin groove so that the main body arm pushes down the lower end of the positioning pin from the lower surface of the insertion hole. The protruding portion becomes perpendicular to the object to be positioned such as the printed circuit board and fits into the positioning hole of the object to be positioned such as the printed circuit board.

〔Example〕

A preferred embodiment in which the present invention is applied to an electronic component inserting machine will be described below with reference to the drawings.

FIG. 1 shows a main part of the printed circuit board transport mechanism 1. The printed circuit board 2 is attached to a pair of rails 3 and 4 so as to be movable in the x-axis direction, and one rail 4 is mounted in the x-axis direction of the printed circuit board 2. The moving body 5 for moving and positioning
It is provided individually. The moving body 5 has a pair of slider members 6 and 7 slidably attached to a guide 8 of a rail 4. A shaft 9 is rotatably mounted between the pair of slider members 6, 7, one end of a rotating arm 10 is fixed to one end of the shaft 9, and the other end of the rotating arm 10 is fixed to the other end. Cylinder 11 is installed. This cylinder 11
The rotation arm 10 is rotated by this operation to rotate the shaft 9. The member indicated by A in FIG. 1 attached to the shaft 9 is an essential part of the present invention. The distance between the rails 3 and 4 is adjustable according to the width of the printed board 2. I.e. rails 3,4
Are connected by a screw rod 12, and the screw rod 12 is rotated in one direction by a motor 13, the rail 3 moves in a direction toward or away from the rail 4. Further, the means for moving the moving body 5 is that a wire 14 is attached to the slider members 6 and 7, the wire 14 is wound around a pulley 16, and the pulley 16 is rotated by a motor 15. The moving body 5 attached to the lower surface of the rail 4 is also moved by the wire 17, the motor 18, and the pulley 19.

1 has a main body arm 20 provided on the shaft 9 and rotatable with the shaft 9. The main body arm 20 is held by the main body arm 20 and rotatably attached to the shaft 9. It has a positioning arm 23 having an insertion hole 22 formed at the tip thereof, through which the positioning pin 21 is loosely inserted. The main body arm 20 has an insertion hole 24 through which the shaft 9 is inserted, and a slit 25 is formed at a position of the insertion hole 24. By shortening the interval of the slit 25, the main body arm 20 is fixed to the shaft 9. It is configured as follows. A means for reducing the distance between the slits 25 is a screw 26. Further, the main body arm 20 has holding arms 27, 27 holding the positioning arm 23, and a pin groove 28 is formed at the tip of the holding arms 27, 27. A compression spring 29 is attached to the positioning arm 23, and the compression spring 29 is pressed by a pressing plate 30. This enables positioning arm
The tip side of 23 is always urged downward. Also, the insertion hole
The middle of 22 is notched, and the pin 33 is inserted in the notch 31 at a position orthogonal to the positioning pin 21. Both ends of the pin 33 are fitted in the pin grooves 28, 28. Further, a projection 34 that contacts the rail 4 is formed on the lower surface of the positioning arm 23. Needless to say, the protrusion 34 may be formed so as to contact the printed circuit board 2.

FIG. 3 is a side view showing a state in which the member A shown in FIG. 2 is assembled. From this state, the cylinder 11 is operated to move the arm 10
When the shaft 9 is rotated in accordance with the rotation of the arm 10 (in the direction of the arrow in FIG. 3), the main body arm 20 rotates and the tip end side of the positioning arm 23 approaches the printed circuit board 2.
When the protrusion 34 comes into contact with a portion of the rail 4 due to such rotation, the positioning arm 23 enters the state shown in FIG. In this state, the lower end of the positioning pin 21 does not protrude from the lower insertion hole 22. Further, in this state, the positioning pin 21 is arranged to be perpendicular to the printed board 2. When the main body arm 20 is further rotated, the pin groove 28 of the main body arm pushes down the pin 33, and accordingly, the lower end of the positioning pin 21 is positioned in the positioning hole 2A of the printed board 2.
Will be inserted into. When the movable body 5 is moved with the lower end of the positioning pin 21 inserted in the positioning hole 2A, the printed board 2 is guided by the rails 3 and 4 to move in the x-axis direction and be positioned.

The overall structure of the electronic component inserting machine is as shown in FIG. 6, and a large number of inserting machines 35 are arranged side by side on the rear side of the mechanism for moving and positioning the printed circuit board 2 only in the x-axis direction. , The number of component feeders 36 ... that correspond to the number of these inserters 35 ... are set on the rear side of the inserters 35. These inserters 35 ... Can be moved and positioned in the y-axis direction.

Although the printed circuit board 2 has been described as an object to be positioned, it goes without saying that it can be applied to all other parts such as various parts that require positioning.

〔effect〕

As described above, according to this invention, the main body arm that rotates with the rotation of the shaft is attached to the rotatable shaft provided on the movable body that is movable in the predetermined direction, and the main body arm is held by the main body arm. A positioning arm rotatably attached to the shaft and having a through hole formed at the tip through which the positioning pin is loosely inserted is urged so that the tip faces downward, and the body arm is inserted into the through hole of the positioning arm. Insert a positioning pin equipped with a pin that fits into the pin groove formed at the tip of the, and form a protrusion on the lower surface of the positioning pin that contacts the object to be positioned or the rail, and turn the shaft to face the object to be positioned. The main body arm to rotate, and after the protrusion of the positioning arm abuts the rail, the main body arm pushes down the pin fitted in the pin groove to position the tip of the positioning pin. Since the object to be positioned is inserted vertically into the positioning hole of the object to be positioned, the object to be positioned such as the printed circuit board is positioned at an accurate position, and the movement of the moving body is controlled to quickly and accurately position the object. It can be positioned with.

[Brief description of drawings]

FIG. 1 is a perspective view showing a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view of a main part, FIG. 3 is a side view of the assembled members shown in FIG. 2, and FIG. FIG. 5 is a side view showing a state immediately after the contact with the rail, and FIG. 5 is a side view showing a state in which the main body arm further rotates after the protrusion abuts on the rail and the positioning pin is inserted into the positioning hole of the printed circuit board. The figure is a schematic perspective view of the entire apparatus. 1 ... Printed circuit board transfer mechanism, 2 ... Printed circuit board or other object to be positioned, 3, 4 ... Rail, 5 ... Moving body, 9 ... Shaft, 20 ... Main body arm, 21 ... Positioning pin, 22 ...... Insertion hole, 23 ...... Positioning arm, 28 ...... Pin groove, 33 ...... Pin, 34 ...... Protrusion.

Claims (1)

[Scope of utility model registration request] 1. A body arm that rotates with the rotation of the shaft is attached to a rotatable shaft provided on a movable body that can move in a predetermined direction, and the body arm is held by the body arm and rotatable on the shaft. A positioning arm that is attached and has a through hole for loosely inserting the positioning pin at the tip is provided so that the tip faces downward, and the positioning pin is inserted through the through hole of the positioning arm and the main body arm Insert the pin into the pin groove formed on the tip of
Position the pin so that it fits into the positioning pin, and form a protrusion on the lower surface of the positioning pin that contacts the object to be positioned or the rail. Rotate the shaft to rotate the body arm toward the object to be positioned and position it. After the arm's protrusion comes into contact with the object to be positioned or the rail, the body arm pushes down the pin fitted in the pin groove and inserts the tip of the positioning pin into the positioning hole of the object to be positioned perpendicularly to the object to be positioned. A positioning mechanism characterized by being configured to.