JPS62111496A - Electronic parts mounting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic component mounting apparatus for automatically mounting electronic components onto a board.

BACKGROUND OF THE INVENTION In recent years, various devices have been proposed for mounting electronic components onto circuit boards, and there is a growing demand for devices that can be mounted more reliably and faster.

A conventional electronic component mounting apparatus will be described below. FIG. 6 is a sectional view of a main part of a conventional electronic component mounting apparatus. In the figure, 3 is a nozzle that attracts electronic components, 35 is a cylinder operated by an electromagnet, 36 is an arm that engages with the cylinder 35 and swings around a bin 37, and 38 is an arm 3
6 is a roller attached to one end of the roller 38, 39 is a guide ring that takes out only the vertical movement of the roller 38, 40 is a
a nozzle shaft that moves up and down together with the guide ring 39;
41 is a main body block having the sliding surface 40a of the nozzle shaft 40 inside; 42 is a bottle fixed to the main body block;
Reference numeral 43 denotes a clamping claw that swings around the bottle 42, and the clamping claw 43 is provided with a convex portion 43a. 44 is a guide ring provided with a guide groove on its outer periphery; 45 is a spring that pulls the clamping claw 43 outward; 47 is a roller restrained by the guide groove; 48 is an arm with roller 47 attached to one end; 49 is an arm 48; A pin 50 serving as a fulcrum is a cylinder that engages with one end of the arm 48 and is operated by an electromagnet. The operation of the conventional electronic component mounting apparatus configured as described above will be described below.

When the cylinder 50 first pulls the arm 48 in the direction of arrow F from the state shown in FIG. 5, the arm 48 swings about the pin 49 and the roller 47 moves upward. Then, the guide ring 44 moves upward, and the convex portion 43a
4, and the gripping claws 43 open in the direction of the arrow. Next, when the cylinder 35 pushes the arm 36 in the direction of arrow E, the arm 3
6 swings around a pin 37, a roller 38 moves downward, a guide ring 39, a nozzle shaft 40. The nozzles 3 move together in the direction of arrow C to suck and mount electronic components.

Problems to be Solved by the Invention However, in the conventional configuration described above, if the amount of descent of the nozzle 3 does not correspond to the thickness of the electronic component, excess pressure will be applied to the electronic component, causing cracking of the electronic component. Clamping claw 43
If the gap when closed does not correspond to the width of the electronic component, the electronic component may be thrown off, so with conventional electronic component mounting equipment, setup changes must be made every time the shape of the electronic component to be mounted changes. However, the company had a low point in terms of productivity.

Means for Solving the Problems The present invention provides a cam whose rotation is controlled according to stored data, and a nozzle and a clamping pawl are operated via a link member that engages with the cam, and when the nozzle is operated. The rotation angle range of the cam and the rotation angle range of the cam when the clamping claws operate do not overlap.

Effect With the above configuration, the amount of descent of the nozzle and the minimum interval between the clamping claws can be set arbitrarily in accordance with the shape of the electronic component.

Embodiment FIG. 1 is a side view of essential parts of an electronic component mounting apparatus according to an embodiment of the present invention. In the figure, 1 is the entire electronic component mounting apparatus. Reference numeral 2 designates a clamping claw that rotates around a pin 2a, and the upper parts of the two clamping claws 2 are pulled together by a spring (not shown in the figure).The pin 2a is attached to a block. It is fixed and does not move up and down.3
16 is a nozzle, 16 is a nozzle shaft, and 22 is a guide ring. The nozzle 3, the nozzle shaft 16, and the guide ring 22 are integrally constructed and can move up and down. Reference numeral 4 denotes a rod-shaped hook having one end fixed to the kite ring 22, and as shown in detail in FIG. has been done. Hook 4 moves downward (and above pin 2a,
As the hook portion 4a that was pushing up the sliding surface 2b of the clamping claw 2 is lowered, the clamping claw 2 is opened by the elastic force of the spring.

5 is a guide ring that moves together with the hook 4; 6 is a roller that transmits motion to the guide ring 5; 7 is an arm provided with the roller 6 at one end and rotatably attached to the block 11 by a pin 10; 9 is a pin 9a and a pin 9b,
A rod is connected to the arm 7 by a pin 9a, an arm 14 swings around the pin 13 and is connected to the rod 9 by a pin 9b, a roller 15 is provided at one end of the arm 14, and an numeral 18 is an arm that the roller 15 is attached to. The contacting cam 17 is a cam 2 that is attached to the same shaft as the roller 15 and rotates together with the roller 15.
0 is a roller that comes into contact with the cam 17; 51 is an arm to which the roller 20 is attached and swings about the pin 19; the arm 51 receives a downward force from a spring 52; 21
is a roller that is provided at one end of the arm 51 and transmits motion to the guide ring 22. 23 is a pulley that rotates together with the nozzle shaft 16, 24 is a timing belt that meshes with the pulley 23, 25 is a pulley that drives the timing heald 24, and 26 is a motor that rotates the pulley 25. The rotation of the motor 26 rotates the nozzle shaft]-6, and adjusts the orientation of the electronic components. 53a is a light emitting element;
3b is a light receiving element, which includes a light emitting element 53a and a light receiving element 5.
3b, the presence or absence of electronic components and their presence are checked.

FIG. 2 is an enlarged view of the main parts of the electronic component mounting apparatus in this embodiment. In the figure, 28 is a motor, 27 is a position detection means, and the cam 17 and the cam 18 are rotated together by the motor 28.

In addition to the above-mentioned elements, a storage device that stores data on the electronic components to be mounted and a control circuit that controls the motor 28 based on the data in the storage device and the output of the position detection device 27 are required, but these are not shown in the diagram. has been done.

The operation of the electronic component mounting apparatus according to an embodiment of the present invention configured as described above will be described below.

FIG. 3 is a graph showing the amount of displacement of the cams, where the horizontal axis is the rotation angle of the cams 17 and 18, and the vertical axis is the amount of displacement. As the motor 28 rotates, the amount of displacement of the cams 17 and 18 changes as shown in FIG. In the graph, the displacement of the cam 18 gradually increases from around 90° (section 32). Accordingly, roller 15 and arm 1
4 swings about the pin 13 as a fulcrum, and the rod 9 moves in the direction of arrow B. This action causes the arm 7 to swing around the bin 10 and push down the guide ring 15.

By lowering the hook 4 together with this, the gripping claws 2 open in the direction of the arrow. While performing the above series of operations, the nozzle 3
The cam 17 that moves remains elevated in section 30. When the roller 15 further rotates in the normal direction, it enters the section 33, and the gripping claw 2
is completely open. At this time, the roller 20 is in section 3.
1, and in this section the roller 20 moves downward, the arm 51 swings, and the guide ring 22 is pushed down.

As a result, the nozzle shaft 16 and the nozzle 3 move together in the direction of arrow C, and enter the process of sucking electronic components. The control circuit, into which the data of the rotation angle of the cam 17 corresponding to the amount of descent of the nozzle is input in advance from the storage section, rotates the motor 2 to the set angle while detecting the output of the position detection means 27.
Rotate 8 forward.

Then, the roller 20 stops in the middle of the section 31 in FIG. 3, and can pick up the electronic component without applying pressure. At the time of suction, the presence or absence and standing of the electronic component are detected by the light emitting element 53a and the light receiving element 53b. When the suction is finished, the motor 28 rotates in reverse, and the nozzle 3 moves upward. The control circuit rotates the motor 28 in reverse until the rotation angle of the cam 18 is inputted from the storage section. At this time, the roller 15 enters the section 32, the arm 14 swings upward, the rod 9 moves upward, the arm 7 swings upward, and the guide ring 5 is pushed up. The hook 4 is also pushed up together with the guide ring 5, and as a result of this movement, the holding claw 2 moves in the direction of arrow E from the state where the electronic component 34 is displaced and attracted to the nozzle 3 as shown in FIG. 4(a). Both sides of the electronic component 34 are held between the holding claws 2 as shown in FIG. 4(b). The control circuit rotates the motor 28 in the normal direction from the state shown in FIG.
Return to the state shown in Figure (b). By repeating this operation, the electronic component 34 is positioned.

Next, the control circuit rotates the motor in the normal direction to the same rotation angle as in the above-mentioned suction operation. In this process, first, the clamping claws 2 open and the nozzle 3 descends to mount the electronic component on a board or the like. Through the above-described series of operations from suction to mounting, the electronic component mounting apparatus 1 must move from the suction position to the mounting position.

In this embodiment, a position detecting device is used to control the rotation angle of the cam in a closed loop, but if a stepping motor or the like is used as the motor, the position detecting device becomes unnecessary.

Also, although two cams are used in this embodiment, one cam is used in this embodiment.
It is also possible to realize this with a single cam.

In addition, in this embodiment, only the rotation angle of the norm is controlled, but it is also easily possible to further control the rotation speed and acceleration of the cam, and in that case, it is possible to mount the electronic components more reliably. I can do it.

Effects of the Invention The present invention uses a cam to lower the nozzle and open/close the gripping claw, and by controlling the rotation of the cam in accordance with the electronic components installed, it is possible to easily change the setup even if the type of electronic components changes. It is possible to obtain an excellent electronic component mounting flow that can improve productivity.

[Brief explanation of drawings]

Fig. 1 is a side view of an electronic component mounting device according to an embodiment of the present invention, Fig. 2 is an enlarged view of the main parts, Fig. 3 is a displacement diagram of the cam, and Fig. 4 (a) is an enlarged view of the holding claw. 4(b) is a diagram of the operation of the holding part, FIG. 5 is an enlarged view of the vicinity of the nozzle, and FIG. 6 is a sectional view of the main part of the conventional electronic component mounting apparatus. 2... Holding claw, 3... Nozzle, 4... Hook, 5
... Guide ring, 7... Arm, 9... Rod, 14... Arm, 16... Bush rod, 17
...Cam, 18...Cam, 22...Guide ring, 51...Name of the arm agent Patent attorney Toshio Nakao Haka 1 person 4-11 room needle theory cumulative view 2--1 Desire J5 Deshi 3--1, 7th L;, rJr, 20- Cola ~ 7, T4, -- v -4 L2-- &! Main Main Exit 01 Figure 22 - J13 Figure 4 Figure J4 - Bonus Group Da 43-1 Priority f% Procedural Amendment February 4, 1988

Claims (1)

[Claims] a cam, a nozzle that attracts the electronic component, a first link portion that contacts the cam surface of the cam and moves the nozzle in the vertical direction within a first rotation angle range of the cam, and a second gripping claw that contacts the cam surface of the cam and opens and closes the gripping claw in a second rotation angle range that is different from the first rotation angle range of the cam; An electronic component mounting apparatus comprising: a link section; a recording section recording data regarding the electronic component to be sucked; and a drive means for rotating the cam according to the data.