JPH0311919Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a printed wiring board assembly device, and in particular, in a device for cutting and removing excess lead wires of mounted components, This relates to a device for holding down.

[Conventional technology]

FIG. 3 is a perspective view of a conventional presser device. The holding plate 1 is a flat plate made of transparent resin, and slots 3 are provided at appropriate positions on its surface for moving and fixing the stator 2 to a proper position.

Then, the printed wiring board 5 set in the main body 4
Each side of the presser plate 1 of the main body 4 is hinged and connected to each other via a fixture so that the mounting surface of the main body 4 and the surface of the presser plate 1 face each other.

In use, prepare the required number of stators 2 according to the area of the printed wiring board 5, insert the threaded portions of the stators 2 into the slots 3, temporarily fasten them with nuts 6, and then connect the printed wiring. An appropriate presser position on the board 5 is determined and the screws are sequentially fixed.

Then, the holding plate 1 is fixed to the main body 4 in a position parallel to the printed wiring board 5, the printed wiring board 5 is held down by the stator 2, and the unnecessary lead wires protruding from the underside of the printed wiring board 5 (as shown in FIG. 27)).

[The problem that the idea attempts to solve]

According to the conventional method, positioning the stator and setting it on the presser plate are troublesome and the process takes too much time.

In other words, when positioning and fixing the stator, it is necessary to search for an uninterrupted part of the printed wiring board from above the transparent holding plate, move the stator along the slot, and fix it with screws. , the following problems arose.

a. If the positions of the slots to which the stator is fixed are limited, it is difficult to select the points at which the stator is fixed because the mounting density of printed wiring boards is increasing.

b. Since the stator is moved along the slot, the stator end must be searched at a high position to avoid hitting any parts.

c. The stator must be fixed one by one, and if the screws are not tightened carefully, the position may shift, making the work difficult and time consuming. This is a problem that cannot be overlooked, especially in the case of high-mix, low-volume production.

The present invention has been devised in view of these problems, and provides a printed circuit board holding device that allows the setup process of the board holding down to be carried out easily and in a short time.

[Means to solve the problem]

The present invention will be described based on FIGS. 1 and 2 showing one embodiment.

The printed wiring board holding device of the present invention includes a stator 10 having at least three legs 9 and a magnetic flat surface on the top part 1, which is placed on a printed wiring board 26, and a stator 10 that holds the printed wiring board 26 in a fixed position. a main body for placing, a linear slider 20 hinged to the main body, a holding plate 15 which is a magnetic rigid flat plate that can magnetically attract the top of the head 11 and is fixed to the movable part of the linear slider 20; A linear slider 20 is attached to the four corners of the presser plate 15, and the presser plate 15 is moved by a linear slider 20 while keeping the plane of the presser plate 15 parallel to the plane of the top of the head 11.
Cylinder 16,1 capable of descending movement along
7, 18, and 19.

[Effect]

Since the stator 10 has three or more legs, it can stand on its own on a flat surface. Therefore, stator 10
is made to stand on the printed wiring board 26 by selecting a pressing point. The number of stators 10 is appropriately determined depending on the area of printed wiring board 26. When the presser plate 15 is tilted toward the main body (closed), the presser plate 15 is moved toward the linear slider 20 while keeping the plane of the presser plate 15 parallel to the plane of the top of the head 11 by the action of the cylinders 16, 17, 18, and 19. Since the presser plate 15 can be moved downwardly along the top of the head, the presser plate 15 can be brought into contact with the top of the head 11 so that the legs of the stator 10 do not shift. It can be absorbed.

This suction force is such that the holding force and own weight will not cause separation or positional displacement unless the operator pulls it away when changing the setup.

〔Example〕

Below, examples of the invention are shown in Figures 1 and 2.
This will be explained in detail based on FIGS.

The stator 10 is a set of three conventional stators 2, and is made to be able to stand on a printed wiring board 26.

A horizontal surface is provided on the top of the head 11, and a magnet is attached to the top surface. The screw 12 is attached to the printed wiring board 2
This is for adjusting the height of the stator 10 according to the thickness of the stator 6.

FIG. 2 is a side view of the embodiment of the present invention, in which the holding plate 15 is made of a flat plate of magnetic material so that the top of the head 11 can be attracted by magnetic force, and a punched wire mesh made of iron or the like is attached to this plate. It can be used as a presser plate 15.

Air cylinders 16, 17, 18, and 19 attached to the four corners of the holding plate 15 bring the holding plate 15 into contact with the stator 10 while keeping the plane of the holding plate 15 parallel to the plane of the top of the head 11. This prevents the stator 10 from shifting its position when it is attracted by the magnetic force of the stator 10, and restricts the vertical movement trajectory of the presser plate 15 together with the linear slider 20. Flow control valves 21 and 2 installed for each air cylinder
2, 23, 24 are air cylinders 16, 17, 1
The actuating speeds of 8 and 19 are adjusted so that the presser plate surface descends horizontally.

The control valve 25 is activated when the presser plate 15 becomes horizontal and the piston of the air cylinder 16 hits the control valve 25, and the air cylinders 16, 17, 18, 19
This controls the start of operation.

The fluid circuit diagram in FIG. 4 shows the air cylinder 1
6, 17, 18, 19, flow control valve 21, 22,
23, 24, and the piping of the control valve 25.

Next, the operation of this embodiment will be described.

After setting the printed wiring board 26 with components mounted thereon in a fixed position on a main body having a shape similar to the main body 4 of the conventional device shown in FIG. Appropriate number of stators 10
However, without being subject to direction or conventional slot restrictions,
The printed wiring board 26 is placed on an appropriate holding point.

Next, when the presser plate 15 is closed horizontally, the air cylinder 16 hits the control valve 25, and the control valve 25 operates, causing the air cylinders 16, 17, 18,
19 operates at a constant speed and shortens its entire length, so that the holding plate 15 descends while remaining parallel to the surface of the printed wiring board.

The magnetic surface of the stator 10 is magnetically attracted to the holding plate 15 and remains attracted unless it is forcibly removed.

The air cylinders 16, 17, 18, and 19 descend until the holding plate 15 presses down the printed wiring board 26 with an appropriate holding force via the stator 10.

Unnecessary lead wire 2 protruding from the bottom surface of the printed wiring board 26
After cutting 7, when the operator lifts the presser plate 15, the control valve 25 becomes non-conducting again and air pressure is applied to the air cylinders 16, 17, 18, 19, each piston is pushed out, and the presser plate 15 It will be in the state shown in the figure. However, since the stator 10 is pulled up while being magnetically attracted to the holding plate 15, when working on the next printed wiring board, the stator 10
There is no need to position the

In addition, as another example, in the stator 10,
There are ones with an increased number of legs 9, ones with springs inserted in place of screws 12, and ones with legs 9 not all fixed but only some with screws so that their positions can be finely adjusted. .

[Effect of idea]

As described above, if the present invention is implemented, the board holding plate can be positioned simply by placing the stator on the mounting board and closing the holding plate. There is no need to perform positioning through trial and error, and positioning can be performed very easily, quickly and accurately, and the number of man-hours for assembling the board can be significantly reduced.

In addition, this invention can be used not only for cutting lead wires, but also for inspection equipment that presses down the mounting board from the component side and contacts the back side with pins.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a stator according to an embodiment of the present invention. FIG. 2 is a side view showing an embodiment of the present invention. FIG. 3 is a perspective view showing an embodiment of the prior art. FIG. 4 is a piping diagram of an air circuit according to an embodiment of the present invention. 9... Legs, 10... Stator, 11... Top of head,
15... Pressing plate, 26... Printed wiring board, 16,
17, 18, 19...Air cylinder, 20...Linear slider.

Claims (1)

[Scope of utility model registration request] A stator 10 having at least three legs 9 and having a magnetic flat surface on the top part 11 and placed on a printed wiring board 26, a body for placing the printed wiring board 26 in a fixed position, and a hinge on the body. linear slider 20
, a presser plate 15 which is a magnetic rigid flat plate that can magnetically attract the top of the head 11 and is fixed to the movable part of the linear slider 20; Top of head 11
A printed wiring board holding device comprising cylinders 16, 17, 18, and 19 that allow a holding plate 15 to be moved downwardly along a linear slider 20 while keeping the plane parallel to the plane of the printed wiring board.