JPH0810480Y2 - Pressurized foot for printed circuit board contour processing machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a press foot for use in a printed board contour processing machine.

[Conventional technology]

Conventionally, as a printed board outer shape processing machine, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 61-5509. That is, when a printed circuit board (hereinafter referred to as the board) that is a product is cut out from a large board (hereinafter referred to as the mother board), the cutter is surrounded by an annular brush, and the chips generated from the processing part are surrounded. While being prevented from scattering, the generated chips are sucked through a duct that communicates with the space surrounded by the brush and are discharged to the outside. Further, when the substrate is separated from the mother substrate, both the mother substrate and the substrate are pressed by the brush and the annular rubber provided on the outside of the brush so that the positions of the two are not displaced. The brush has an inner diameter of about 40 mm in order to reliably press up the mother substrate during the outer shape processing and to efficiently absorb the generated chips.

[Problems to be solved by the device]

However, when a substrate having a small outer shape such as for a watch is cut off, the substrate cannot be pressed down not only by the ring-shaped rubber but also by the brush, and the substrate is sucked together with the cutting chips and may be scratched by coming into contact with the cutter. Therefore, for example, the suction of the chips is stopped only when the substrate is cut off, the substrate is taken out, and then the chips remaining in the processing portion are sucked, which is not good in workability.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a press foot for a printed board external shape processing machine which can reliably press down a board having a small external shape and improve workability.

[Means for Solving the Problems]

The above-mentioned problem is that the piston, which is arranged on the outer periphery of the spindle that holds the cutter at the tip, is slidable in the axial direction of the spindle, the main body supported at the lower end of the piston, and the axial direction of the spindle that is arranged at the lower end of the main body. An annular first brush that is slidable and coaxial with the cutter, a guide member that is disposed inside the first brush at the lower end of the main body and is slidable parallel to the lower surface of the main body, and an annular support that is supported at the lower end of the guide member. The second brush of the main body is provided with an air hole on the surface facing the guide member of the main body, and a notch is provided in a part of the second brush so that the piston is in the raised position and compressed air is not supplied to the air hole. Sometimes the second brush is coaxial with the cutter, and when the piston is in the lowered position and when supplying compressed air to the air hole, the cutter is movable beyond the outer circumference of the second brush.

[Action]

Since the brush is doubled and the notches are provided in the X and Y directions of the second brush, the diameter of the second brush can be reduced, and moreover, from the position where the second brush is fixed to the inside of the second brush. You can move the cutter over the radius. As a result, even when the substrate has a small outer shape, when the substrate is cut off, about 50% of the second brush presses the separated substrate. Moreover, the inside of the second brush is isolated from the outside by the outer first brush, and the chips generated during processing can be efficiently sucked.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1 showing a front sectional view and FIG. 2 showing a plan view. Note that FIG. 1 corresponds to the II cross section of FIG.

A main body 1 is supported by a piston 2 so as to be movable in a direction in which a spindle 3 moves up and down (hereinafter, referred to as Z direction). Reference numeral 4 denotes an annular brush, which is arranged at the lower end of the main body 1 and is slidable in the Z direction. Reference numeral 5 is a spring that biases the brush 4 in the Z direction. A guide surface 6 is slidable in parallel with the lower surface of the main body 1. A notch 15 is provided inside the guide plate 6 in the X and Y directions, and a notch 16 is provided at a position corresponding to the notch 15 at the bottom of the main body 1. Reference numeral 7 denotes a spring, which positions the guide plate 6 at the axis O of the spindle 3. Brushes 8 and 9 are supported concentrically on the lower end of the guide plate 6.
The brush 9 is not provided in the portion corresponding to the notch 15 and is divided into four. A cutter 10 moves in the left-right direction (hereinafter referred to as the Y direction). 11 is a substrate. 12
Is the mother board. 13 is a lower plate for protecting the surface of the table 14. The table 14 moves in the X direction, which is perpendicular to the Y direction. Reference numeral 17 is an inlet for compressed air, which is connected to an annular groove 18 provided on the lower surface of the main body 1.

The operation will be described below, taking the case of processing the rectangular substrate 10 as an example, with reference to FIG. In the figure, A is a processing start point, and processing is performed up to the processing end point F along the arrow.

At the point A, the piston 2 is raised with respect to the spindle 3, that is, the main body 1 is kept in the raised position,
The spindle 3 is lowered and the cutter 10 is cut into the mother substrate 12. At this time, the mother substrate 12 is pressed by the brush 4 urged by the spring 5. Further, the chips generated by the processing are sucked from a duct (not shown) connected to the main body 1.
From point A to point B, move the table 14 in the X direction, from point B to point C
The cutter 10 is moved in the Y direction up to the point, and the table 14 is moved in the X direction from the point C to the point D. Further, the cutter 10 is moved from the point D to the point E, but the piston 2 is operated at the point E close to the point F, the main body 1 is lowered, and the brushes 8 and 9 pressurize the substrate 11 and the mother substrate 12. Also, compressed air is supplied from the inlet 17. When the cutter 10 is further moved in the Y direction in this state, the compressed air supplied from the inlet 17 exerts almost no frictional force between the guide plate 6 and the main body 1, and the guide plate 6 moves to the point E. Stay I.e. brushes 8,9
Does not move while pressing the substrate 11 and the mother substrate 12. Then, the substrate 11 can be separated from the mother substrate 12 at the point F. The positions of the brushes 4, 8 and 9 at the moment when the substrate 11 is separated from the mother substrate 12 are shown in FIG. That is, the brush 4 is located at a position centered on the point F, and the brushes 8 and 9 are located at a position centered on the point E. Board 11
When the separation of is completed, the supply of compressed air to the inlet 17 and the suction of chips from the duct are stopped. And
When the piston 2 and the spindle 3 are raised, the guide plate 6 is returned to the position of the axis O by the spring 7.

In the present embodiment, the brush 8 and the brush 9 are divided into two in the radial direction, but it goes without saying that they may be combined into one.

[Effect of device]

As described above in detail, in the present invention, since the brushes 8 and 9 which are movable in the horizontal direction with respect to the cutter 10 are arranged in the vicinity of the cutter 10, the brushes can be reliably pressed even if the outer dimension of the substrate 11 is small. be able to. Therefore, the substrate 11 is sucked,
Since there is no damage caused by contact with the cutter 10, workability is improved.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention. FIG. 2 is a plan view. FIG. 3 is an explanatory diagram for explaining the operation. 1 ... Main body, 2 ... Piston, 3 ... Spindle, 4,8,
9 ... Brush, 6 ... Guide plate, 7 ... Spring.

Claims (1)

[Scope of utility model registration request] 1. A piston, which is arranged on the outer periphery of a spindle for holding a cutter at its tip, is slidable in the axial direction of the spindle, a main body supported at the lower end of the piston, and a piston arranged at the lower end of the main body in the axial direction of the spindle. An annular first brush that is slidable and coaxial with the cutter; a guide member that is disposed inside the first brush at the lower end of the main body and is slidable parallel to the lower surface of the main body;
An annular second brush supported at the lower end of the guide member, an air hole is provided on the surface of the main body facing the guide member, and a notch is provided at a part of the second brush, so that the piston is at the raised position. When the compressed air is not supplied to the air hole, the second brush is coaxial with the cutter, and when the piston is in the lowered position and the compressed air is supplied to the air hole, the cutter is moved to the second position.
A pressure foot for a printed circuit board contour processing machine, characterized in that it can be moved beyond the outer circumference of the brush.