JPS6237664Y2 - - Google Patents

Description

[Detailed description of the invention] A complicated mechanism is used to punch hollow holes with oblique cuts in thin sheets and plate-like materials such as cardboard, drawing paper, thin plastic plates, and wooden boards. Mechanical equipment is required, and although such hollow holes are desired as elegant hollow holes in mounts that hold down the surroundings of colored paper, photographs, etc. that are housed in frames, they are complicated and expensive. The drawback was that it required multiple processing steps, and the mounts with hollow holes were expensive.

The present invention aims to provide a simple and inexpensive device for drilling such elegant hollow holes.

To explain the present proposal together with one embodiment, the base 1
The screw shaft 2 rotates while being fitted and supported by bearings 15 provided at both ends of the screw shaft 2. The screw shaft 2 rotates in conjunction with a prime mover 18 such as a motor by means of a belt 17 that is stretched around a pulley 16 from one end, and holds the screw shaft 2. Threaded tube 1
The sliding platform 3 with 9 has an oblique plane 4 on one side,
The oblique plane 4 has a sliding plate 6 that slides only obliquely up and down via bearings 5 and the like.

This sliding plate 6 has arm rods 7 and 8 that project upward and downward, and a cutter 9 is detachably fixed to the tip of the arm rod 7 that projects downward, and the lower part thereof is the same as the screw shaft 2. A mount base 12 is provided with a concave groove 11 in the direction.

On the other hand, an appropriate number of cam floors 10, 10 are rotatably attached to the tip of the arm rod 8 projecting upward, and the cam floors 10, 10 are connected to the cam grooves 14 of the cam disc 13.
It is housed in a mating manner. This cam disk 13 is the base 1
The cam plate 13 is fixed at the same angle as the oblique plane 4 by a support 20 or the like, and a cam groove 14 is bored in the cam disk 13 to regulate the required vertical movement of the cutter 9. Cam floor 10 attached to rod 8,
This relates to the structure of a hollow hole drilling device having an oblique cut surface, which is characterized in that the hollow hole drilling device 10 is fitted and accommodated therein.

Since the present invention is as described above, when the prime mover 18 such as a motor rotates, this rotation is transferred to the belt etc.
7 to the screw shaft 2 on the base 1, causing the screw shaft 2 to rotate.

The slide table 3 has a screw tube 19 at its center, and the screw tube 19 surrounds the screw shaft 2. Therefore, for example, if the screw shaft 2 rotates to the left, the slide table 3 will move around the screw shaft 2.
When the screw shaft 2 rotates to the right, the sliding base 3 moves to the right.

On the other hand, the slide plate 6 is placed on the oblique plane 4 of the slide table 3 via bearings 5, etc., so it moves left and right according to the movement of the slide table 3, but the slide plate 6 itself moves left and right. It cannot be slid diagonally up and down.

Therefore, the slide plate 6 moves up and down according to the shape of a cam groove 14 in which a rotatable cam floor 10, 10 is fitted to the tip of an arm rod 8 that projects upwardly. At first, the hole is drilled horizontally, but then it descends diagonally and becomes horizontal again.From a certain point, it climbs diagonally again and when it reaches the starting height, it is drilled horizontally again.

The cam floors 10, 10 fitted in the cam grooves 14 cause the sliding plate 6 to move up and down when the sliding table 3 moves from right to left, and as a result, the lower end of the arm rod 7 Since the right-to-left movement of the slide table 3 and the vertical movement of the slide plate 6 are combined and transmitted to the cutter 9, the cutting edge hits the workpiece (mounting board, etc.) A diagonally and remains unchanged. In this state, gradually make deeper and more diagonal cuts until the cutting edge reaches the back side of the workpiece, and then proceed horizontally to cut it to the required length. When the cutting edge reaches the surface of the workpiece A, the left movement of the sliding table 3 ends, and when drilling a rectangular hollow hole, the drilling of one side of the hollow hole is completed. . When this work is completed, the prime mover 18 is reversed, the slide table 3 is returned to its original position, the workpiece A on the mount table 12 is rotated 90 degrees, and the same operation is repeated four times to make a square hollow hole. Obtainable.

In addition, if the two devices of the present invention are arranged so that the machining direction is 90 degrees, and the workpiece A is machined once, then rotated 180 degrees and machined again, a rectangular hollow hole can be drilled twice. You can also get it.

As described above, the present invention combines the rightward (or leftward) movement of the slide table 3 due to the rotation of the screw shaft 2 with the vertical movement of the cam floor 10 that advances within the cam groove 14, and in addition to this, the cam floor 10 is held obliquely. By adjusting the angle of the cutter 9, it is possible to easily drill a hollow hole in which all the cut surfaces of the hollow hole are oblique, and it is possible to easily drill a hollow hole in which all the cut surfaces are oblique, and it is possible to do so at a low cost without requiring complicated and expensive mechanical equipment. This invention is extremely useful as a hollow hole drilling device having an oblique cut because it can provide a device with few failures.

The operation of this device can be made automatic by setting microswitches that serve as reverse and stop switches for the prime mover 18 at the end and start points of the sliding table 3 (or cam floor 10). Also cam board 1
3 can be slid left and right, or if it is replaceably attached to a desired cam groove 14 drilled in a desired cam disk 13, the machining dimensions of the cutting edge can be freely adjusted.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a right side view of the same, Figure 3 is a vertical sectional view of the oblique plane part, Figure 4 is a slope view of the cam disk, and Figure 5 is a slope of the mount with hollow holes drilled by the proposed device. figure,
FIG. 6 is a longitudinal sectional view thereof. 1...Base, 2...Screw shaft, 3...Sliding base, 4
... Slanted plane, 5 ... Bearing, etc., 6 ... Sliding plate, 7, 8 ... Arm rod, 9 ... Cutting tool, 10 ... Cam floor, 11 ... Concave groove, 12 ... Mounting base, 13
...Cam disc, 14...Cam groove, 15...Bearing, 1
6... Pulley, 17... Belt, 18... Prime mover, 19... Screw tube, 20... Support column, A... Workpiece (mounting board, etc.).

Claims (1)

[Scope of utility model registration request] A screw shaft 2 that is supported horizontally on a base 1 and rotates
The sliding table 3, which engages with the arm 7 and moves left and right on the base 1, has an inclined plane 4 on one side, and a sliding plate 6 which can only rise and fall diagonally up and down is fitted onto the inclined plane 4 via bearings 5, etc., and arms 7, 8 are protruded from the top and bottom of the sliding plate 6. A blade 9 is attached to the tip of the lower arm 7, and an appropriate number of rotatable cam floors 10, 10 are attached to the tip of the upper arm 8. A mount 12 having a groove 11 parallel to the screw shaft 2 is provided below the blade 9. A cam plate 13 having the same inclination as the arms 7, 8 is separately fixed onto the base 1, and the cam plate 13 has a cam groove 14 which causes the tip of the blade 9 to perform the desired movement.
The device for drilling a hollow hole having an oblique cut is characterized in that the device drills a hollow hole having an oblique cut and engages a cam floor 10, 10 therewith.