JPH0334960Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention engages and positions each pallet conveyed by a free flow conveyor with a first positioning pin, and then positions the workpieces on the pallet. The present invention relates to a positioning device that performs positioning by engaging with a second positioning pin.

(b) Prior Art Japanese Patent Publication No. 4862/1986, which precedes the present invention, describes a device for positioning a contact probe for continuity testing of a printed circuit board at a predetermined position. This device uses two power sources to perform desired positioning.

As a technique for performing positioning using two power sources in this manner, there is a technique described below.

That is, in FIG. 2, individual pallets 2 are sequentially conveyed on a free flow conveyor 1 using a chain. On this pallet 2 is a printed circuit board as the product to be inspected, specifically the RF for VTR.
A workpiece 4 equipped with a modulator 3 is placed. When positioning the workpiece 4, first, the pallet 2 that has arrived at the desired position is pushed up by the pallet positioning mechanism 5 and fixed to the stoppers 6, 6 by pressure, and then the workpiece 4 on the fixed pallet 2 is positioned. They are engaged and positioned by a mechanism 7. In the pallet positioning mechanism 7, the left and right frames 8 of the free flow conveyor 1,
A first air cylinder 11 as a power source for pushing up is installed on a fixed plate 10 attached to 9,
The first air cylinder 11 pushes up the first
The lifting plate 12 is guided by the guide shafts 13, 13, and the pallet positioning pins 14, 14 above the guide shafts 13, 13 are inserted into the pallet positioning holes 15, 15, respectively. 2 is pushed up and fixed to the stoppers 6, 6 by pressure. In the work fixing mechanism 7, after the pallet 2 is fixed, the second air cylinder 17 serving as a power source for pushing up the first lifting plate 12 pushes up the second lifting plate 18, and the second lifting plate 18 is moved to the second lifting plate 18. The guide shafts 19, 19 guide the second
Workpiece positioning pin 20 on the lifting plate 18,
20 is inserted into the workpiece positioning holes 21, 21 to position the workpiece 4 at a predetermined position. Work 4
The printed circuit board inspection contact needles 22, 22, 22 on the second elevating plate 18 are positioned in a state where
The electrical characteristics of the printed circuit board 3 are checked by contacting the test patterns 23, 23, 23.

However, in the above-mentioned conventional technology, two air cylinders 11 and 17 are provided for each of the first elevating plate 12 and the second elevating plate 18 as a power source for pushing up, which increases the cost and complicates the device. .

(c) Problems to be Solved by the Invention In view of the above-mentioned points, the present invention enables both the first and second positioning pins to be actuated by a single push-up power source.

(d) Means for solving the problem A pallet conveyed by a free flow conveyor is engaged and positioned with a first positioning pin, and a workpiece on the pallet is engaged with a second positioning pin. In the positioning apparatus, a guide shaft provided with the first positioning pin is inserted into a plate that is moved up and down by an upward biasing means, and this guide shaft is biased upwardly with respect to the plate. At the same time, a pedestal is placed on the plate, and the second positioning pin is provided on the pedestal.

(E) Effect According to the present invention, when the plate is raised by the upward biasing means, the guide shaft is first pushed up via the compression spring on the plate, the first positioning pin engages with the pallet, and the pallet is moved upward. is pushed up and fixed to the stopper.

Even after the pallet has stopped rising, the plate is pushed up and rises by the amount of deformation of the spring, the pedestal on the plate also rises, the second positioning pin on this pedestal engages with the work, and the work is held in a predetermined position. Positioned.

(F) Embodiment Next, only the main parts of an embodiment of the present invention will be explained. Other parts that are not particularly explained are configured similarly to the conventional example described above, and their explanation will be omitted.

The feature of this embodiment is that, as shown in FIG. 1, a pair of first positioning pins 24, 24 are provided on a first elevating plate 12a which is moved up and down by an air cylinder 11a serving as an upward biasing means. The guide shafts 25, 25 are inserted into the plate 12a, and the guide shafts 25, 25 are urged upwardly with respect to the plate 12a by the compression springs 26, 26.
Place the pedestal 27 on a, and place the second pedestal on this pedestal 27.
Lifting plate 18a, second positioning pin 20
a, 20a and printed circuit board inspection contact needle 22
a, 22a, 22a are provided. Also,
The pedestal 27 is placed on the plate 12a via the free roller mechanism 28.

In the embodiment described above, when the plate 12a is raised by the upward biasing means 11a, the plate 1
The guide shafts 25, 25 are pushed up via the compression springs 26, 26 on the pallet 2a, and the first positioning pins 24, 24 engage with the pallet positioning holes 15, 15, and the pallet 2 is pushed up and the stoppers 6, 6 It is fixed by pressure welding.

Even after the pallet 2 stops rising, the plate 12a is pushed up and rises by the amount of deflection of the compression springs 26, 26, and the pedestal 27 on the plate 12a also rises.
Second positioning pins 20a, 20 on this frame 27
a engages with the positioning holes 21, 21 of the work 4, and the work 4 is positioned at a predetermined position.
Further, the pedestal 27 has second positioning pins 20a,
When the contact needles 20a engage with the positioning holes 21, 21, they move on the free roller mechanism 28 to follow the positioning holes 21, 21, and accurately move the printed circuit board inspection contact needles 22a, 22a, 22a on the stand 27. The test patterns 23, 23, 23 are brought into contact with each other.

(g) Effects of the invention Since the invention is constructed as described above, the first positioning pin and the second positioning pin can be moved up and down using only one upward biasing means to position the pallet and the workpiece respectively. . Therefore, it is possible to reduce costs and simplify the device, which has a practically beneficial effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing a main part of an embodiment of the present invention, and FIG. 2 is a view showing a conventional example. 1...Free flow conveyor, 2...Pallet, 4...Work, 6...Stopper, 11a...
Lift biasing means, 12a... plate, 20a...
second positioning pin, 25... guide shaft;
26... Spring, 27... Frame, 28... Free roller mechanism.

Claims (1)

[Claims for Utility Model Registration] 1. A pallet conveyed by a free flow conveyor is engaged with a first positioning pin, pushed up and fixed to a stopper under pressure, and a workpiece on the pallet is engaged with a second positioning pin. In the device in which the guide shaft provided with the first positioning pin is inserted into the plate that is moved up and down by the upward biasing means, the guide shaft is moved upwardly with respect to the plate. A positioning device characterized in that the plate is biased by a spring, a pedestal is placed on the pedestal, and the second positioning pin is provided on the pedestal. 2. The positioning device according to claim 1, wherein the pedestal is placed on the plate via a free roller mechanism.