JP2568543B2 - Component mounting equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a component mounting apparatus for mounting an electronic component on a printed circuit board.

2. Description of the Related Art Conventionally, this type of apparatus has a configuration shown in FIG.

In FIG. 3, reference numeral 1 denotes a shaft rotated by a driving unit (not shown), 2 denotes a cam mounted on the shaft 1, 3 denotes a roller which comes into contact with the cam 2 via a lever 6 around a fulcrum 5 by a cylinder 4, Reference numeral 7 denotes a roller attached to one end of the lever 6, reference numeral 8 denotes an insertion head which is jointed by the roller 7, and can be slid up and down by a block 10 attached to the plate 9, and reference numeral 11 denotes a printed circuit board.

The operation of the driving device configured as described above will be described below. The shaft 1 is rotated by a driving unit (not shown, hereinafter referred to as a motor), and the cam 2 rotates similarly to the shaft 1. Since the lever 6 is pulled by the cylinder 4 around the fulcrum 5, the roller 3 is
Swings to follow. The roller 7 at the other end of the lever 6 causes the insertion head 8 to move up and down by using the block 10 attached to the play 9 as a sliding portion, and
Insert electronic components into

Problems to be Solved by the Invention However, in the above configuration, when a load is applied at the time of shaft rotation as shown in FIG. On the dashed line side, the load becomes (+) load (it becomes difficult to rotate), and when a plurality of cams are used with the same tendency of (+) load, as shown in FIG. As a result, the torque specification of the motor becomes large, the controllability of the motor also deteriorates, and the workability at the time of adjustment also deteriorates.

The present invention has been made in view of the above-described drawbacks, and provides a driving device that smoothes a load torque of a motor, improves controllability of the motor, and improves workability at the time of machine adjustment.

Means for Solving the Problems In order to solve the above problems, the present invention provides a mounting head for mounting an electronic component on a printed circuit board, and a first cam for operating the mounting head via a first lever. This first
It comprises a shaft on which a cam is mounted, and a drive unit for rotating the shaft.
Aside from the cam, a second cam in which a part of the second lever abuts so as to be able to follow is provided, and the shape of the second cam is
When rotating the shaft to rotate the first cam and the second cam at the same time, a load change opposite to a load change applied to the drive unit by the first cam for mounting head operation is applied to the drive unit. It is composed.

Effect of the Invention According to the present invention, the second cam having a load opposite to the load applied to the motor by the first cam for operating the insertion head is provided by the above configuration, so that the load torque of the motor is smoothed, and It improves controllability and helps to improve workability during machine adjustment.

Embodiment Hereinafter, a component mounting apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a structural view of an apparatus according to one embodiment of the present invention. In FIG. 1, reference numeral 12 denotes a drive unit, for example, a shaft which is rotated by a motor (not shown), 13 denotes a cam mounted on the shaft 12, and 14 denotes a drive unit, for example, a cylinder 15 via a lever 17 about a fulcrum 16 through a lever 17. A roller which is in contact with the cam 13; 18 is a roller attached to one end of a lever 17; 19 is an insertion head which can be slid up and down by a block 21 which is joined to the roller 18 and is attached to a plate 20; 22 is a printed circuit board; 23 is a shaft A cam 24 mounted on the roller 12 is in contact with the cam 23 via a lever 27 around a fulcrum 26 by a cylinder 25.

Next, the operation will be described. The shaft 12 is rotated by a motor (not shown), and the cam 13 is
Rotates in the same way as. Since the lever 17 is pulled around the fulcrum 16 by the cylinder 15, the roller 14 swings following the cam 13. The roller 18 at the other end of the lever 17 allows the insertion head 19 to be mounted on a block 20
The electronic component is inserted into the printed circuit board 22 by moving up and down along the slide surface of 21. On the other hand, the same shaft as the cam 13
A cam 23 attached to 12 rotates similarly to the cam 13. Since the lever 27 is pulled around the fulcrum 26 by the cylinder 25, the roller 24 follows the cam 23 and the lever 27 swings. At this time, when the shaft 12 rotates to the left as shown in FIG.
On the other hand, a half turn of the cam 23 is a (+) load on the one-dot chain line side. In the remaining half rotation, the cam 13 has a (+) load and the cam 23
Is a (-) load. Therefore, since the cam 13 and the cam 23 work to cancel each other out, the load torque is reduced as shown by c when the cam 13 is made a and the cam 23 is made b as shown in FIG.

As described above, according to the present invention, by providing a cam having a load opposite to the load applied to the motor by the cam for operating the insertion head, the load torque of the motor is smoothed and the controllability of the motor is improved. As a result, the workability during machine adjustment can be improved.

Effects of the Invention As described above, the present invention provides one or more insertion heads for mounting electronic components on a printed circuit board, and one for operating the insertion head and other elements in all directions via levers and rollers. Alternatively, the first cam includes a plurality of first cams, a shaft on which the first cam is mounted, a motor for driving the shaft, and a cylinder provided so as to follow the first cam. Is provided with a second cam separately from the one for operation of the insertion head, and the second cam is followed by a cylinder via a lever and a roller.
By configuring this cam to apply a load that is opposite to the load applied to the motor by the insertion head operation cam, the load torque of the motor is smoothed, the controllability of the motor is improved, and the work at the time of machine adjustment Performance can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a component mounting apparatus according to an embodiment of the present invention, FIGS. 2a, 2b, and 2c are load torque curve diagrams, and FIG. 3 is a front view of a main part of a conventional component mounting apparatus. 4 FIGS. A, b and c are load torque curve diagrams in a conventional example. 12 ... Shaft, 13/23 ... Cam, 14.18 / 24 ... Roller, 15/25 ... Cylinder, 16/26 ... Support point, 17/27
... lever, 19 ... insertion head, 20 ... plate, 21 ...
... block, 22 ... printed circuit board.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiro Taniguchi 1006 Kadoma, Kadoma Matsushita Electric Industrial Co., Ltd. (56) References JP-A-57-85300 (JP, A)

Claims (1)

(57) [Claims] 1. A mounting head for mounting an electronic component on a printed circuit board, a first cam for operating the mounting head via a first lever, a shaft on which the first cam is mounted, and rotating the shaft. And a second cam on which a part of a second lever abuts so as to be able to follow the shaft separately from the first cam, and the shape of the second cam is When the shaft is rotated to simultaneously rotate the first cam and the second cam, the first cam for mounting head operation is configured to apply a load change to the drive unit that is opposite to a load change applied to the drive unit. A component mounting apparatus characterized in that: