JPS61152337A - Holding device of electronic components - Google Patents

Abstract

PURPOSE:To make it possible to always uniformly hold electronic components by use of a couple of jaws by providing link members for driving the jaws in closing direction to hold the electronic components and springs for forcing the link members in the direction to close the jaws. CONSTITUTION:An absorption tube 17 is fitted to the center of a block 12 through a coupling 18 as a means for absorbing electronic components, and an air absorption path is extended to the nozzle 6 at the end of a component delivering head 2. An X axis spring 39 for holding the electronic components in the direction of X axis and a Y axis spring 40 for holding them in the direction of Y axis are so provided as to force sleeves 34 and 35 upward respectively. Both of holding jaws 41 and 42 are so provided to the lower sections of hooks 36 and 37 through a pin 43 as to be rotated freely together with blocks 44 and 45. And each of the holding jaws 41 and 42 is so provided with a spring 46 as to force the jaws 41 and 42 in the opening direction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic component gripping device for mounting electronic components on a printed circuit board.

BACKGROUND OF THE INVENTION In recent years, electronic components have been widely used in a wide range of fields, not just electronic products, and the production of electronic components has been remarkable. Automatic mounting of electronic components onto a printed circuit board using an automatic mounting device is becoming more common.

At this time, the electronic component is picked up by the transfer head and placed on the printed circuit board, but the electronic component gripping device provided on the transfer head needs to accurately pick up the electronic component. In other words, when the transfer head picks up an electronic component, the electronic component cannot be accurately placed on the printed circuit board unless the relative position between the electronic component and the transfer head is accurate.

For this reason, conventional electronic component gripping devices are provided with a pair of claws for grasping the electronic component and a cam for driving the claws in the closing direction.

Problems to be Solved by the Invention However, in order to grasp electronic components with high precision in such conventional gripping devices for electronic components, it is necessary to manufacture cams and the like that drive the claws with high precision.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gripping device as a transfer head that can perform positioning with high precision even if it is not manufactured with high precision.

A step to solve the problem The present invention provides a pair of gripping claws for gripping an electronic component that has been sucked, a link member that can be driven in a direction to close the pair of gripping claws, and the link member is connected to the gripping claw. It is equipped with a spring that biases it in the closing direction.

Operation Since the present invention has the above-described configuration, the pair of claws are closed by the same stroke with the same urging force, so that the electronic component can be accurately gripped.

Embodiment FIG. 1 shows an entire electronic component mounting apparatus using a gripping device for electronic components according to an embodiment of the present invention, FIG. 2 is a perspective view showing the gripping device, and FIG. 3 shows a gripping device. FIG. 3 is a cross-sectional view showing a gripping state by the device. In FIG. 1, 1 is an electronic component mounting device for mounting electronic components on a board, 2 is a transfer head, 3 is an electronic component supply device, and 4 is a conveyor for transporting the printed circuit board. In FIG. 2, a tappet 5 is attached to the top of the transfer head 2 and is moved up and down in the direction of arrow E by the driving force of an external plunger (not shown). Further, the tappet 6 is connected to the nozzle 6, and the tappet 5 and the nozzle 6 are urged upward by a spring 8 inserted between the angle setting gear 7 and the tappet 5. Further, two anti-rotation shafts 9 are provided on the angle setting gear T.

A notch 10 is fixed to a lever 11, and the lever 11 is rotatably provided around a pin 13 fixed to a block 12 as a fulcrum. The lever 11 is provided with a pin 14, and a tension spring 16 is attached between the pin 16 fixed to the block 12 and the pin 14. is energized and stops the rotation of the gear. A suction tube 17 is attached to the middle part of the block 12 via a joint 18, and there is an air suction path to the nozzle 6 at the tip of the transfer head 2. The block 12 is provided with a mechanism for opening and closing the gripping claws, and the mechanism will be described below. The roller 19 is driven downward by the driving force of the first external plunger (not shown) in the direction shown by arrow F. roller 19
is rotatably fixed to a pin 21 fixed to the block 2o, and the block 20 is held between a plate 22 via a ball (not shown) and can slide vertically. The block 2o is connected to a rod 26 via a shaft 23 and a ball joint 24, and to the shaft 26 via a ball joint 24'. The lever 27 is swingable in the direction of arrow B using a pin 28 provided on the block 12 as a fulcrum. Lever 27 is pin 29
The lever 27 is always urged upward by a tension spring 30 attached to the lever 27, and a roller 31 is provided at the tip of the lever 27. The roller 31 is inserted between the disc guides 32 and 33, and is provided so as to be moved in the direction of arrow C by the swinging drive of the lever 27. A sleeve 35 for Y-axis positioning is slidably provided inside the sleeve 34 for X-axis positioning, an X-axis side hook 36 is fixed to the sleeve 34, and a Y-axis hook 37 is fixed to the sleeve 36. Fixed. Also, an X for gripping the electronic component 38 in the X-axis direction
A circumferential spring 39 is provided to urge the sleeve 34 upward. Further, in order to grip the electronic component 38 in the Y-axis direction, a Y-axis circumferential spring 40 is provided so as to bias the spring IJ-spring 36 upward.

At the lower part of the hooks 36 and 37, both gripping claws 41 and 42 are provided via pins 43 so as to be rotatable with blocks 44 and 46.
, 42 in the opening direction.

Next, we will discuss the effect. When the transfer head 2 is at the suction position of the electronic component supply device 3, the roller 19 is first pushed down in the direction of arrow F by the vertical movement of the first external plunger.
Push down the block 2Q via the pin 21 and press down the shaft 23
From ball joint 241 rod end 42. Power is transmitted to the ball joint 24' and drives the lever 27 and roller 31 in the direction B (arrow) using the pin 28 as a fulcrum against the spring 30 provided on the pin 29. Next, the row 231 provided between the disc guides 32 and 33 that slide up and down on the transfer head 2 is lowered, so that the sleeve 34.
5 descends against the springs 39 and 40, and as the hook 3 fixed to the sleeve 36 descends as shown in FIG. The gripping claws 4 are arranged at equal intervals by the arc-shaped tip 4a.
1°42 opens in the direction of the arrow. The above action is shown in the Y direction and is similarly performed in the X direction, so a description thereof will be omitted.

Next, by driving the second external plunger (not shown) in the direction of arrow E, the tappet 5 uses the shaft 9 as a guide and pushes against the spring 8 to lower the nozzle 6 and suck the electronic component 38 from the electronic component supply device 3. do. Then, as the second external plunger (not shown) is released and returned to its original position, the tappet 5 is raised by the spring 8, and the electronic component 38 sucked together with the nozzle 6 is also raised. When a first external plunger (not shown) releases the roller 19
becomes free and the lever 27 is moved through the pin 29 by the spring 3Q.
returns to its original position using the pin 28 as a fulcrum, and the roller 19 ascends to its original position via the ball joint 24 connected to the shirt 26, the rod 26, the ball joint 24, the shaft 23, the block 20, and the pin 21. return. roller 3
1 returns to its original position, the transfer head 20 disk guide 32.3
3 rises, the hooks 3a and 38 also rise due to the springs 39 and 40, and as shown in FIG. In order to close at equal intervals, the electronic component 38 is positioned at the center of the tip of the nozzle 6, and is positioned in the same manner in the X and Y directions. During movement, the transfer head 2, which has picked up and positioned the electronic component 38, is set at an angle in the direction of the arrow, and is stopped on the printed circuit board while maintaining a predetermined angle. Continuing, as mentioned earlier, the gripping claw 41
, 42 are opened and the nozzle 6 is lowered to mount the electronic component 38 on the printed circuit board, after which only the nozzle 6 is raised to perform the next suction operation.

By repeating the above steps, the electronic components 38 are mounted one after another on the printed circuit board.

Effects of the Invention As described above, the present invention provides a pair of claws for gripping an electronic component, and a link member for driving the claws in the closing direction.
Since a spring is provided that biases the link member in the direction of closing the claws, the pair of claws always grip the electronic component equally, allowing accurate positioning of the electronic component with a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a 7'C electronic component mounting device using an embodiment of the present invention, Fig. 2 is a perspective view of the main part, and Figs. 3 and 4 are side sectional views of the main part. . 6... Nozzle, 36.37... Hook,
38...Electronic parts, 39.40...Springs,
41.42...Gripping claw. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4rM Three Seven Eight Calls

Claims (1)

[Claims] A means for suctioning an electronic component is provided, a pair of gripping claws are provided for gripping the electronic component that has been sucked, a link member is provided that can be driven in a direction in which the pair of gripping claws is closed, and the link member is connected to the pair of gripping claws. A gripping device for an electronic component, characterized in that it is provided with a spring that biases it in a closing direction.