JPS6357177B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling machine for drilling holes in printed circuit boards, and particularly to a drilling machine that can supply a large amount of drills.

A plurality of holes of different sizes are formed in the printed circuit board. Among these, there are cases in which each printed circuit board has several tens to tens of thousands of holes for mounting electronic components or for connecting the surface and the outer surface of the printed circuit board.

Generally, when drilling holes with a drill,
The number of holes per drill is set to several thousand.

An automatic drill changer in a conventional drilling machine is provided with an automatic drill change means that engages with a spindle and a drill magazine disposed in the vicinity of the spindle. The automatic drill exchange means first takes out the drill from the spindle, returns it to the drill magazine, then takes out the required drill from the drill magazine from the drill post,
This is inserted into the spindle. Therefore, as described above, the drill magazine must be disposed near the spindle, and is therefore subject to restrictions in terms of installation area.

On the other hand, in a structure in which the spindle itself moves to the drill magazine side without using the automatic drill exchange means and the spindle directly picks up the drill from the drill post, when the spindle picks up the drill, the spindle Because the peripheral equipment interferes with other posts, the arrangement pitch of the drill posts is limited, and therefore it is not possible to arrange a drill magazine that holds a large number of different types of drills as in the above case. The limit was to own a drill.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drilling machine that can supply a large quantity of drills for drilling the holes that are processed most frequently, downsizes the exchange means, and improves work efficiency. be.

In order to achieve the above object, in the present invention, at one end of the table on which the printed circuit board is placed,
An intermediate drill storage device having a discharge post and a drill post is provided, and the column is provided with a magazine for holding a large number of drills and an automatic drill feeding device for feeding the drills from the magazine to the drill post. It is characterized by being able to be supplied.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.
This will be explained based on the diagram.

In the figure, 1 is the bed of the drilling machine. Reference numeral 2 denotes a motor, which is supported at one end of the bed 1. 3 is a bracket, with bed 1 facing motor 2.
Fixed. 4 is a feed screw, one end of which is rotatably supported by the bracket 3, and the other end of which is connected to the motor 2. A table 5 is supported movably on the bed 1 in the direction of arrow X, and fixes a nut 6 screwed onto the feed screw 4. 7
is a printed circuit board placed on the table 5.

8 is a column, which is erected on bed 1. 9
is a feed screw rotatably supported by column 8,
Moreover, it is coupled to a motor (not shown). 10
is a slide and guide 11 fixed to column 8
A nut 12 that is supported movably in the Y direction and is screwed onto the feed screw 9 is fixed thereto. 13 is a motor, which is supported by the slide 10. 14
is a feed screw connected to the motor 13. 1
Reference numeral 5 denotes a spindle, which is supported by the slide 10 so as to be movable in the direction of arrow Z, and fixes a nut 16 that is screwed into the feed screw 14.

A drill 17 is detachably held on the spindle 15.

18 is the drill 1 ejected from the spindle 15
It is fixed to bed 1 with socket 7. A chute 19 is connected to the socket 18. Reference numeral 20 denotes a receiving box, which is provided at the front of the bed 1 and connected to the chute 19.

Reference numeral 21 denotes an intermediate drill storage device, which is fixed to one end of the table 5 and has a configuration as shown in FIG. A bracket 22 is fixed to the table 5. 23 is the discharge post, and the bracket 22
It is inserted and fixed into a hole 24 formed in. 25
A drill post is inserted and fixed into a hole 26 formed in the bracket 22. Stoppers 27 are fixed to both ends of the hole 26. A drill guide 28 has one end movably fitted into the hole 26 and is biased by a spring 29 so as to come into contact with the stopper 27. Reference numeral 30 denotes a drill holder, one end of which is slidably fitted into the drill guide 28, and a spring 31 is inserted into the lower part. A collar 32 is fixed to the lower end of the drill holder 30.

A bracket 33 is fixed to the column 8.

34 is a drill automatic supply device, and a bracket 33
, and has a configuration as shown in FIGS. 3 and 4. 35 is an upper plate, and 36 is a lower plate, each of which is fixed to the bracket 33. 37 is the front plate, upper plate 3
5 and a lower plate 36. 38
is an extrusion rod that slidably passes through the upper plate 35 and the lower plate 36. 39 is a York cam,
It is fixed to the center of the push rod 38. A collar 40 is fixed to the upper end of the push rod 38. 41
is inserted into the extrusion rod 38 with a spring so as to be located between the upper plate 35 and the collar 40. 42
is a guide bar whose central portion is bent into a U-shape, and which passes through the upper plate 35 and the lower plate 36 in a slidable manner. A hole 43 for guiding the shank portion of the drill 17 is formed at the lower end of the guide bar 42 . A dot 44 is fixed to the upper end of the guide bar 42. A spring 45 is inserted into the guide bar 42 so as to be located between the upper plate 35 and the dot 44. A shaft 46 is rotatably supported by the bracket 33 via a bearing 47. A flange 48 is fixed to one end of the shaft 46. A pin 49 is provided upright on the flange 48 and has one end slidably fitted into the yoke cam 39. A sprocket 50 is fixed to the shaft 46 and rotationally driven by a drive means (not shown). 51 is a limit switch, upper plate 35
It is attached to the top and detects contact with the dock 44.

A case support 52 is fixed to the lower plate 36. 53 is a channel-shaped magazine case, which is fixed to the case support 52.
A spring 54 is inserted into the magazine case 53. A stopper 55 is supported by the lower plate 36 so that one end thereof protrudes into the magazine case 53.

Reference numeral 56 denotes a magazine, which has a structure as shown in FIGS. 2 and 2a. 57 is a main body, which includes a hole 58 for inserting the drill 17, a groove 59 formed across this hole 58, a V-shaped groove 60 that widens toward the hole 58, and a confirmation cut. A notch 61 is formed. 62 is a linear rubber,
It is accommodated within the groove 60 and a portion thereof protrudes toward the hole 58 . Therefore, drill 1 in hole 58
When the drill 7 is inserted, the shank portion of the drill 17 comes into contact with the rubber 62 and is held by its frictional force to prevent it from falling by itself. And all holes 58
The magazine 56 is attached to the magazine case 53 with the drill 17 housed therein. At this time, the stopper 55 comes into contact with the shank portion of the drill 17 through the groove 59 to restrict the movement of the magazine 56.

With this configuration, when replacing the drill held on the spindle 15, first, the table 5 is moved in the direction of the arrow X, and the discharge post 23 is positioned above the socket 18. At the same time, the slide 10 is moved in the Y direction to position the drill 17 held by the spindle 15 above the discharge post 23.

In this state, when the spindle 15 is lowered to the replacement position and the drill 17 is released, the drill 17 falls from the spindle 15, passes through the ejection post 23, the socket 18 and the chute 19, and is stored in the receiving box 20. Ru.

When the drill 17 is ejected from the spindle 15, the spindle 15 rises.

Next, the table 5 moves to position the drill post 25 below the hole 43 of the guide 42.

The sprocket 50 then rotates, causing the flange 48 to rotate via the shaft 46. Then, the yoke cam 39 is pushed down by the pin 49, so
The push rod 38 moves down against the spring 41. At this time, the drill 17 in the magazine 56 is pushed down by the push rod 38. The drill 17 is then pushed out from the magazine 56 and inserted into the drill guide 28 of the drill post 25 and the drill holder 30. At this time, when the pin 49 comes into contact with the guide bar 42, the guide bar 42 also moves down against the spring 45, guiding the shank of the drill 17 through the hole 43,
To prevent the drill 17 from falling down.

Then, when the flange 48 rotates 180 degrees, the push rod 38 and the guide bar 42 reach the lower end. At this time, the drill 17 comes into contact with the drill holder 30,
When pressed down further, the drill holder 30 descends against the force of the spring 31. When the guide bar 42 hits the drill guide 28, the drill guide 28 descends against the force of the spring 29. At the same time, Doc 44
presses the limit switch 51 and detects that the drill 17 has been transferred from the magazine 56 to the drill post 25.

Further rotation of the flange 48 causes the pin 49 to disengage from the guide bar 42. Then, the guide bar 42 is pushed up by the counter pressure of the spring 45. on the other hand,
The push-up force of the spring 41 is also acting on the push-out rod 38, but since the pin 49 is engaged with the yoke cam 39, the push-out rod 38 rises together with the pin 49.

Then, when the push rod 38 is released from the magazine 56, the magazine 56, which is being pushed by the counter pressure of the spring 54, moves to a position where the next drill 17 comes into contact with the stopper 55.

On the other hand, after the drill 17 is attached to the drill post 25, the guide bar 42 and the push rod 38 are attached to the drill 1.
7, the table 5 moves to position the drill 17 attached to the drill post 25 below the spindle 15.

Then, the spindle 15 descends and the drill 1
Hold 7 and rise.

Then, by moving the table 5 and the slide 10, the printed circuit board 7 and the drill 17 are moved,
After positioning in the XY direction, spindle 15
Drill the hole by lowering it.

Note that the drill 17 may be supplied to the drill post 25 at any time, such as when the drill 17 is replaced, when the replacement is completed, or during the drill 17 replacement operation as described above. Drill 1
An example of a flowchart of the exchange operation of No. 7 is shown in FIG.

As described above, according to the drilling machine of the present invention, it is possible to supply a large quantity of drills for drilling the holes that are processed the most. Furthermore, by providing the intermediate drill storage device on the table, a tool exchange arm or the like that is separate from the drilling machine main body is not required, so that the overall configuration of the drilling machine can be simplified and downsized. In addition, the drill ejected from the spindle,
Since the drill is guided to the designated discharge position by the discharge post and discharge chute, the drill can be discharged quickly, allowing drills to be replaced in a short time and improving work efficiency. be.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing an example of a drilling machine according to the present invention, Fig. 2 is a front view of a magazine, and Fig. 2a is a front view of a magazine.
The figures are a side sectional view of FIG. 2, FIG. 3 is a front view of the automatic drill feeding device, FIG. 4 is a side sectional view of FIG. 3, and FIG. 5 is a front sectional view of the intermediate drill storage device. FIG. 6 is a flow chart showing the drill replacement operation. 5...Table, 7...Printed circuit board, 15...
...Spindle, 17...Drill, 21...Intermediate drill storage device, 23...Discharge post, 25...Drill post, 34...Drill automatic feeding device, 38
...Extrusion rod, 53...Magazine case, 56...
magazine.

Claims (1)

[Claims] 1. In a drilling machine that drills a hole in a predetermined position on a workpiece by relatively moving a table on which a workpiece is placed and a spindle holding a drill, the drill is placed in a predetermined position on the bed holding the table. a drill ejecting chute for guiding the drill to the ejecting position, and at one end of the table, a discharging post for guiding the drill ejected from the spindle to the drill ejecting chute, and a drill post for holding the drill to be fed to the spindle; A drill storage device is provided,
A magazine case that is arranged to face the movement path of the intermediate drill storage device and holds a magazine loaded with a plurality of drills of the same type so as to be movable in the direction in which the drills are arranged, and an extruder that pushes out the drills from the magazine case. A drilling machine characterized by being equipped with an automatic drill supply device equipped with a rod.