JP2623702B2 - Electronic component setting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component setting device that sets an attitude of an electronic chip component in an electronic component mounting machine before the electronic chip component is mounted.

2. Description of the Related Art In recent years, with the expansion of the electronic component mounting field, electronic components have also been diversified from appearance to function, and electronic component standardization devices for adjusting the attitude of electronic components have been used in such various electronic components. However, there is a demand for a function of flexibly setting the rules.

Hereinafter, an example of a conventional electronic component setting device will be described with reference to FIGS. 4, 5, 6, and 7. FIG. 4th
The figure shows an electronic component mounting device. In FIG. 4, reference numeral 20 denotes a parts cassette, 21 denotes an electronic component suction and mounting nozzle (hereinafter simply referred to as a nozzle), 22 denotes an electronic component, 23 denotes an electronic component standardizing device, 24 denotes a substrate, 25 denotes a head, and 26 denotes XY. It is a table.

The operation of the electronic component mounting apparatus configured as described above will be described below. First, the nozzle 21 that has sucked the electronic component 22 from the parts cassette 20 is sent to the electronic component setting device 23 by the intermittent rotation of the head 25, where the attitude is adjusted, and then the nozzle 21 again intermittently moves the head 25. Moves to the mounting position, and the XY table 26
Positioning is performed so that the predetermined position of 24 matches the mounting position, and then the nozzle 21 descends to mount electronic components on the substrate 24.

FIGS. 5 and 6 show an example of the configuration of a conventional electronic component setting device, which is a component of the electronic component mounting device described above. In FIG. 5, 27 is a rotating shaft, 28 is a plate cam, 29 is a cam follower, 30 is a lever, 31 is a pin, 32
Is a spring, 33 is a connecting rod, 34 is a lever, 35 is a slide shaft, 36 is a pin, and 37 is a setting claw. In FIG. 6, 38, 39, 40, 41, 42, and 43 are levers, respectively, and 44 is a spring. The cam follower 29 is attached to one end of the lever 30, and the plate cam 28 has a spring 32.
Pressed by the tensile force of A connecting rod 33 is connected to the other end of the lever 30, and the other end of the connecting rod 33 is connected to a lever 34. The lever 34 and the slide shaft 35 are further connected, and the other end of the slide shaft 35 is pressed against the lever 38 by the compression force of the spring 44. The lever 38 is further connected to five levers 39, 40, 41, 42, 43, of which four levers 40, 41, 42, 43 fix the setting claw 37.

The operation of the electronic component setting device configured as described above will be described below with reference to FIGS. 5 and 6. First, the plate cam 28 rotates with the rotation of the rotating shaft 27,
The cam follower 29 rotates with the pin 31 as a fulcrum. The displacement of the cam follower 29 is controlled by the lever 30, the connecting rod 33, and the
Is transmitted to When the slide shaft 35 pushes the lever 38, the levers 40 and 41 operate with the rotation of the lever 38, and a pair of the setting claws 37 opens and closes. The same operation is performed for the lever 39, and by performing the above operation, the chip components are regulated from four directions.

FIG. 7 illustrates the above setting operation in the drive timing chart of the entire electronic component mounting machine. That is, the nozzle 21 is transferred above the electronic component setting device 23 with the rotation of the head while the electronic component 22 is still attracted from the parts cassette 20 shown in FIG. After the electronic component 22 has come above the center of the four setting claws, the head 25 stops (FIG. 7), and the nozzle 21 moves to a high position where the electronic component 22 enters between the setting claws 37 (FIG. 5). Descend to the end. When the lowering operation of the nozzle 21 is completed, the setting claw 37 is opened and closed by the rotation of the plate cam 28 and the link mechanism operation described above, and the setting (clamping) operation is performed. Thereafter, the nozzle 21 performs the rising operation again, and after this, the head 25 performs the intermittent rotation operation again.

Problems to be Solved by the Invention However, in the above-described configuration and operation, since the closing start position of the setting claw opening / closing operation is always the same regardless of the component size (FIG. 8), depending on the size of the electronic component, In some cases, the setting claw may perform an opening / closing stroke operation more than necessary. That is, as shown in FIG. 8, when two types of components, large and small, are set by the conventional setting device, the stroke operation is small for a large component, and the setting claw clamps the component with a small operation. However, for small parts, the stroke movement becomes large, and the
The moving distance required to pinch 22 is increased. In the conventional setting device, the fact that the closing operation start position of the setting claw is constant irrespective of the component means that for a smaller component, the impact force given to the component becomes relatively large, and the component becomes larger. Regulations may become unstable. In addition, when the tact time for mounting the electronic component is further increased, the stroke of the setting claw is also increased, and a problem that the impact force applied to the component is further increased is expected.

The present invention has been made in view of the above problems, and provides an electronic component setting device that can arbitrarily change a closing operation start position of a setting claw according to dimensions of an electronic component.

Means for Solving the Problems In order to solve the above-mentioned problems, an electronic component setting device of the present invention has a configuration in which a drive source for changing a link length in a drive mechanism for opening / closing operation of a setting claw is provided. It is.

According to the above-described configuration of the present invention, the setting claw is closed up to a certain clearance in advance depending on the component size, and at the time of component setting,
By operating only the minimum stroke, even if the component size changes, always with minimal opening and closing operation and impact force,
Parts regulation can be performed.

Embodiment An electronic component setting device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an electronic component setting device according to an embodiment of the present invention. In FIG. 1, 1 is a rotating shaft, 2 is a plate cam, 3 is a cam follower, 4 is a lever, 5 is a pin, 6 is a spring, 7 is a connecting rod, 8
Is a lever, 9 is a slide shaft, 10 is a pin, and 11 is a setting claw. The above is the same as the configuration shown in FIG.
The configuration in which the slide shaft 9 is connected to the slide shaft 9 is also the same as that described with reference to FIG. 5 in that a servo drive mechanism for varying the distance between the levers 4 and 8 is incorporated. That is, 12 is a motor, 13 is a gear, 14 is a gear, 15 is a nut, 16 is a connecting lot, and one end is a screw portion.

In the configuration shown in FIG.
Since the description is made with reference to the drawings, the configuration of the built-in servo drive mechanism will be described here. The motor 12 and the gear 13 are interlocked, and the gear 13 and the gear 14 are engaged when the motor 12 is driven. The gear 14 is fixed to a nut 15, and the nut 15 and the connecting rod 7 can rotate freely. The nut 15 and the connecting rod 16 are connected by a screw.

The operation of the electronic component setting device configured as described above will be described below with reference to FIGS. 1 and 2. First, FIG. 2 shows the timing of opening and closing the setting claw in the present invention in the drive timing chart of the entire electronic component mounting machine. The head (FIG. 4) rotates as shown in FIG.
At the same time as the operation of transferring the electronic component to the upper center of the setting claw 11, the closing operation of the setting claw 11 is started by driving the motor 12 in FIG. After the intermittent rotation operation of the head is stopped, the nozzle performs a lowering operation so as to bring the electronic component to the center of the setting claw 11, but at this time, the setting claw 11 has already been minimally interposed between the electronic component. It is closed to the position where the necessary clearance can be maintained. Next, the setting claw 11 only needs to operate for the remaining stroke. It should be noted here that the gear 13 and the gear 14 are always engaged at the timing of driving the motor 12, but during the opening and closing operation due to the displacement of the plate cam 2,
It is not in an engaged state. Further, it is necessary to output an appropriate preliminary stroke amount to the motor 12 according to the component dimensions.

As described above, according to the present embodiment, by providing a drive source for varying the ring length in the link mechanism for driving the opening and closing operation of the setting claw, the setting claw is closed up to a predetermined clearance in advance depending on the component size, and the component At the time of setting, by operating only a fixed stroke, the setting of the component can be always performed with minimum operation and impact even if the component size changes (FIG. 3).

In this embodiment, an arbitrary length can be designated by using a servomotor as a drive source that makes the ring length variable. However, in order to simplify the apparatus, the ring length is gradually increased using a cylinder. May be made variable.

Effect of the Invention As described above, the present invention incorporates a drive source that makes the ring length variable in the opening / closing operation drive mechanism of the setting claw, whereby the setting claw is closed up to a certain clearance in advance according to the component size,
By performing only a fixed stroke at the time of component setting, the setting can always be performed with the minimum operation even if the component size changes. Therefore, high precision component mounting can be realized,
It can also be said that it is advantageous for speeding up the mounting tact.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electronic component setting device according to an embodiment of the present invention, FIG. 2 is a timing chart for opening and closing a setting claw of the electronic component setting device, and FIGS. FIG. 4 is a view showing a state in which the setting claw of the electronic component setting device is closed to a predetermined clearance, FIG. 4 is a perspective view of the electronic component mounting device, and FIG. 5 is a configuration diagram of a conventional electronic component setting device. FIG. 6 is a plan view of a setting claw driving mechanism,
FIG. 7 is a timing chart for opening and closing the setting claw of the conventional electronic component setting device, and FIGS. 8A and 8B are diagrams showing a state where the setting of the setting claw in the conventional electronic component setting device is started to be closed. 1 ... rotating shaft, 2 ... plate cam, 3 ... cam follower, 4
... Lever, 7 ... Connecting rod, 8 ... Lever, 11 ... Setting claw, 12 ... Motor.

Claims (1)

(57) [Claims] 1. A plate cam having a rotary drive source, a link mechanism for transmitting a displacement of the plate cam, and at least one pair of setting claws for performing a setting operation of an electronic component in accordance with the displacement transmitted via the link mechanism. An electronic component setting device, comprising: a servo drive mechanism in which the link length is steplessly variable by the rotary drive source and another external drive source in the link mechanism.