JPS6113213Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hole positioning device for a punching device for drilling holes in a board to be drilled, such as a printed circuit board, and more particularly to a punching device with a scope for detecting the center of the hole.

Generally, the scope of a scope-equipped drilling device is installed on a drilling platform with its lens barrel aligned with the center of the drilling tool, and the scope's light projection means projects the drilling mark marked on the plate to be drilled onto the screen on the front of the scope body. However, the positioning of the plate to be drilled is performed by superimposing and comparing a detection mark such as a circle provided on the screen with the perforation mark projected at a constant magnification, but in the conventional perforation device, The screen has a structure fixed at a fixed position on the front surface of the scope body.

However, the perforation marks marked on the perforated plate have the same shape as the detection marks provided on the screen, but they come in various sizes, and in the conventional device structure, the perforation marks projected on the screen also have a fixed magnification. Therefore, if the sizes of the detection and drilling marks on the screen are different, it becomes necessary to align the marks so that the gap between the two marks is constant all around, and to find the exact center of the drilling. There was a problem that not only could the positioning of the machine not be achieved, resulting in a decrease in work accuracy, but also caused the worker to become fatigued more quickly, resulting in a decrease in work efficiency.

In addition, in order to eliminate the above-mentioned inconvenience, it is possible to prepare detection marks of different sizes to be placed on the screen, but it requires a means to create the marks and attach/detach them, so it is difficult to eliminate the problem of reduced workability. It is not very effective, and it is conceivable to provide a magnification adjustment means on the scope itself, but this is not practical because it increases the heat near the device due to the high output of the light source such as a halogen lamp, and increases the size and height of the device.

In view of the above-mentioned conventional problems, the present invention uses a simple structure to make it possible to adjust the size of the perforation mark projected on the screen to approximate the detection mark while keeping the magnification of the scope constant. The object of the present invention is to provide a scope-equipped drilling device with high work accuracy and workability at a low cost.

The technical means taken by the present invention to achieve the above purpose is to install a scope on the drilling base plate, and use the scope's light projection means to project the drilling mark on the plate to be drilled onto a screen provided on the front of the scope body. In a drilling device with a scope that aligns the drilling center of the plate to be drilled with the center of the drilling tool by overlapping the detection mark provided on the screen, the screen is movable back and forth on the projection axis of the scope. The perforation mark projected on the screen can be enlarged or reduced approximately to the size of the detection mark.

Therefore, the present invention detects the perforation mark by moving the screen forward or backward while looking at the screen, and adjusting the enlargement or reduction until the perforation mark projected on the plate to be perforated approximates the size of the detection mark. Align to the mark.

An embodiment of the present invention will be described based on the drawings.

FIG. 1 is a partially omitted front view of the drilling device, and 1 in the figure is a scope, with a scope main body 1a in the upper part, a support part 1b in the middle part, and a light projecting means 1c in the lower part. A support part 1b is fitted and fixed to the tip of a cantilevered support frame a raised on a workbench A, and the support part 1b is installed on a drilling base board b.

The light projecting means 1c of the scope 1 is arranged so that the axis of the projection lens 24, which will be described later, is located on the spindle axis of a drill (drilling tool) 30 provided below the drilling table b, that is, on the same axis as the drilling center. Arrange.
On the front side of the scope body 1a, there is a bellows-shaped cylindrical body 3 having a screen 2 between which the screen 2 is extendable and retractable.
It is provided so that it can freely move back and forth with the intervening.

A frame frame 2a is provided around the peripheral edge of the screen 2, and the peripheral edge of the screen 2 is stretched and fixed at the center of the inner peripheral surface by screwing or gluing, and the light projecting means 1
It is possible to project (image) using c.

One of the two openings of a bellows-shaped cylinder 3 is attached and fixed to the rear periphery of the frame 2a, and the other is attached and fixed to the front periphery of the scope body 1a. The screen 1 is moved forward and backward in the front direction of the scope body 1a by the forward and backward sliding of a guide shaft 4 described later (second embodiment).
figure).

Furthermore, inside the picture frame 2a, that is, the screen 2
A locking piece 11 for removably locking a detection plate 2' made of paper or film material with a predetermined detection mark 2'a on it is rotatably pivoted at an appropriate distance. (Figure 4).

The guide shaft 4 has the other end of the guide shaft 4 slidably passing through holders 5, 5 which are respectively disposed and fixed to the upper portions of both inner walls of the scope body 1a, and one of the guide shafts 4 is attached to the frame frame 2a. Attach and secure on both upper sides of the inner circumferential surface.

Therefore, as the guide shaft 4 slides back and forth, the screen 2 moves back and forth parallel to the front surface of the scope body 1a (FIG. 2).

Furthermore, a sliding roller 6 for sliding the guide shaft 4 back and forth is inserted inside the upper part of the front opening edge of the scope body 1a via the rotating shaft 7, with its rotating surface in pressure contact with the lower peripheral surface of the guide shaft. shall be established.

The rotation shaft 7 passes through the upper part of the front opening edge of the scope body 1a so as to be rotatable from the inside to the outside, and a sliding roller 6 is pivotally attached to the inner tip of the rotation shaft 7.
An operating handle 8 for operating the rotational direction of the sliding roller 6, that is, the forward and backward movement of the screen 2, is fixed via a rotation shaft 7 to the outer tip of the screen (third
figure).

As the operating handle 8 is operated (rotated), the guide shaft 4 slides back and forth by an integrally interlocking sliding roller 6, and the frame frame 2a, that is, the detection plate 2' attached to the tip thereof, slides back and forth. The size of the detection mark 2'a of the detection plate 2' is adjusted by moving the screen 2 equipped with a screen 2 forward or backward, and enlarging or reducing the perforation mark 10a of the plate 10 to be perforated, which is projected (imaged) by the light projecting means 1c. The center of the hole can be detected easily and accurately by aligning it with the center of the hole.

The light projecting means 1c includes a light source 20, a condenser lens 21, and a reflecting mirror 2 that reflects light from the light source 20.
2. Reflector 23 that illuminates the perforation mark 10a of the perforated plate 10 placed on the perforation plate b, and the projection lens 2
4. It is composed of a reflecting mirror 25 that reflects the image onto the screen 2.

Incidentally, the light projecting means 1c is attached to the support portion 1b so as to be movable up and down, and can be moved up and down by operating the focus adjustment knob 26. That is, by moving the screen 2 forward or backward, the focus of the projected (imaged) perforation mark 10a is adjusted.

Next, to explain the drilling operation of the drilling device of the present invention, the drilling mark 10a to be drilled on the board 10 to be drilled
is positioned below the scope 1 and placed on the base plate b, and a detection plate 2' having a detection mark 2'a formed on the front surface of the screen 2 is attached and fixed by the locking piece 11. may be directly marked on the screen 2 without using a detection plate. Then, while looking at the screen 2, the operation handle 8 is operated (rotated) to enlarge or reduce the perforation mark 10a until it matches the size of the detection mark 2'a.

After that, the perforation mark 10a becomes the detection mark 2'a.
When the drilling center has been detected, in other words, when the foot switch (not shown) installed at the bottom of the workbench A is turned on, the drill 30 installed below the drilling platform B will move onto its spindle. The drill is rotated and raised to drill into the plate 10 to be drilled.

Next, the board 10 to be drilled is moved to detect the center of the next hole to be drilled in a similar manner, thereby making it possible to perform the holes in sequence.

In the embodiment of the present invention, the screen is moved back and forth manually, but it is optional to move the screen electrically.

Further, although the drilling method from below was used to punch holes in the plate to be punched, it is optional to use a punching method from above using a movable drilling tool.

Since the present invention is constructed as described above, it exhibits the following excellent effects.

A scope is installed on the drilling base plate, and the projection means of the scope projects the drilling mark on the plate to be drilled onto a screen provided on the front of the scope body. In a scope-equipped drilling device that aligns the drilling center with the center of the drilling tool, the screen is provided so as to be movable back and forth on the projection axis of the scope, and the drilling mark projected on the screen is adjusted to the size of the detection mark. Since it is possible to adjust the approximate magnification or reduction, the magnification of the scope itself of the conventional scope-equipped perforation device remains constant, and the perforation mark on the plate to be perforated projected onto the screen approximates the detection mark provided on the screen. It can be adjusted to enlarge or reduce. Therefore, it is possible to accurately detect and align the drilling centers of each of the various large and small drilling marks marked on the board to be drilled using a type of detection mark, thereby making it possible to perform highly accurate drilling work.

Since the drilling center of each drilling mark of various sizes can be detected with a simple structure in which a screen is provided so as to be movable back and forth on the projection axis of the scope, a drilling device with a high precision scope can be provided at low cost.

In addition, the center of the perforation mark can be easily and accurately detected by adjusting the size of the perforation mark until it approximates the detection mark while looking at the screen, which reduces operator fatigue and at the same time It is possible to improve work efficiency without reducing performance.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a partially omitted front view, FIG. 2 is a partially enlarged side view with a portion cut away, and FIG. 3 is a partially cutaway side view. 2 is a sectional view taken along the - line in FIG. 2; FIG. 4 is a partially cutaway perspective view showing the state in which the screen is equipped with a detection plate;
FIG. 5 is a partially cutaway perspective view of the main part. In the diagram, 1...Scope, 2...Screen, 1
a... Scope body.

Claims (1)

[Scope of utility model registration request] A scope is installed on the drilling base plate, and the projection means of the scope projects the drilling mark on the plate to be drilled onto a screen provided on the front of the scope body. In a scope-equipped drilling device that aligns the drilling center with the center of the drilling tool, the screen is provided so as to be movable back and forth on the projection axis of the scope, and the drilling mark projected on the screen is adjusted to the size of the detection mark. 1. A drilling positioning device for a drilling device, characterized in that it can be adjusted to approximate enlargement or reduction.