JPS6332569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tapping device, and in particular, a plurality of tapping heads are provided on a turret, and by rotating the turret, one selected tapping head is brought to a tapping position, and one device can be tapped. The present invention relates to a so-called turret-type tapping device with which various types of tapped holes can be formed.

In the above-mentioned tapping device, a drive input device for the tapping head brought to the tapping position is conventionally provided at the tapping position, but the transmission of drive from the drive input device to the selected tapping head is difficult. This is done by engaging and disengaging the gears as they approach and separate from each other. Therefore, in such conventional devices, the gears in the engaging and disengaging portions suffer from severe wear, and the gears have to be replaced frequently, and although good, the operating period is short.

Therefore, this invention does not have the above drawbacks,
Good operation can be obtained over a long period of time,
Furthermore, the present invention provides a tapping device that operates extremely smoothly.Examples will be described below with reference to the drawings.

That is, in the figure, numeral 1 is a turret rotatably supported by a support tube 3 erected on a frame 2, and four tapping heads 4 are provided on the same circumference of the turret 1 at intervals of 90 degrees. A gear portion 1a formed on the outer periphery of the turret 1 is meshed and rotated by a turret rotating device 5, which will be described in detail later, and is fixed at a predetermined position by an indexing device 6, so that any tapping head 4 can be accurately positioned at the tapping position. I'm starting to feel like I'm being held by T. A drive shaft 7 is rotatably supported within the support tube 3 and connected to a drive motor 9 via a coupling 8. A drive sun gear 11 at the tip of the drive shaft 7 is connected to an input gear 12 of each tapping head 4.
are always engaged. The tapping head 4, turret rotation device 5 and index device 6 will be explained in detail below.

The tapping head 4 consists of a proximal end support part 4a which supports the entire tapping head on the turret 1 so as to be movable up and down, and a head part 4b including a known tapping unit 13 supported perpendicularly to the proximal end support part 4a. , the base end support part 4a is vertically slidable with respect to the turret 1 and is supported by a rotation stopper pin 1.
In the support cylinder 15 non-rotatably supported by 4,
It rotatably supports a rotating shaft 16, and the input gear 12 and head portion 4b are fixed to the upper part of the rotating shaft 16. 15a is a vertical slit formed in the support tube.

The head portion 4b includes a mounting bush 17 of the tapping unit 13 fixed to the rotating shaft 16 via the input gear 12, a known tapping unit 13 mounted on the bush 17, and a cylindrical shape of the tapping unit 13. The tapping unit 13 includes a rotation prevention frame 18, and the tapping unit 13 has its casing side prevented from rotating by the rotation prevention frame 18, and a mounting bush 17, which is connected to the input shaft 13a.
A rotational driving force is constantly transmitted through the input gear 12, and the taps 19, each of which has a different type attached to each unit 13, are constantly rotating. 2
Reference numeral 1 denotes a spring interposed between the rotation stopper frame 18 and a support ring 23 of the rotation stopper frame 18 extending from the turret 1 via a support 22. (FIG. 3) Also, the size of the mounting bush 17 is selected to compensate for the difference in the length of the tap 19, and the height of the tip of the tap 19 is made to be the same. 18a is a vertical slit formed in the rotation stopper frame.

Next, the turret rotating device 5 will be explained. In this embodiment, the turret rotating device 5 includes a rack 25 connected to an air cylinder 24,
A pinion gear 26 meshed with the rack 25, a rotating shaft 28 connected to the pinion gear 26 via a one-way clutch (electromagnetic clutch) 27, and a gear portion 1a of the turret fixed 29 to the rotating shaft 28.
When the pinion gear 26 rotates back and forth by a predetermined angle by reciprocating the cylinder 24, the rotating shaft 28 and the gear 31 rotate in one direction by a predetermined angle. At the same time, the turret 1 rotates by 90 degrees, and the positions of the tapping units 4 are interchanged cyclically.

A slider 32 is connected to the rod of the cylinder 24 and has the rack 25 fixed to its side surface.
3 is a guide rail of the slider 32.

Note that the turret rotating device 5 is not limited to the above example, and can be used to directly rotate the turret 1 using a servo motor or the like.
may be rotated by a constant angle.

Next, the index device 6 will be explained.
The indexing device 6 consists of a fitting block 34 provided on the lower surface of the turret 1 and a protruding pin device 35 provided on the frame 2 side.
In this example, a protruding pin 37 with a wedge-shaped tip is connected to the rod of an air cylinder 36.
After the turret 1 is rotated by the rotating device 5 and stopped, the projecting pin 37 is projected upward and fitted into the fitting block 34, so that the turret 1 is fixed at the correct stopping position. There is.

Therefore, the fitting blocks 34, like the tapping heads 4, are mounted on the lower surface of the turret 1 at intervals of 90 degrees (FIG. 3).

At a position below the tapping head 4 held at the tapping position T, an air cylinder 38 with two stages of feed speed is provided as a device for pushing up the tapping head.
A rotatable pressing member 3 provided at the tip of the rod 8
9, the proximal end support portion 4a of the tapping head 4
It seems to be pushing up. 16a is an abutment flange portion formed at the lower end of the rotating shaft 16.

Next, the operation of the above embodiment will be explained.

That is, the tap 19 of each tapping head 4 on the turret 1 is connected to its input gear 1 as described above.
The cylinder 2 of the turret rotating device 5 is always meshed with the sun gear 11 and driven to rotate.
4 is reciprocated a predetermined number of times to expand and contract, the turret 1 is cyclically rotated by 90 degrees as described above, and the desired tapping head 4 is brought to the tapping position T. Next, the protruding pin 37 of the indexing device 6 is inserted into the fitting block. 34 and fix the position.

When the cylinder 38 is extended in this state, the pressing member 39 comes into contact with the rotating shaft 16 rotating within the support tube 15, and pushes the entire support portion 4a, that is, the entire tapping head 4 upward. At this time, since the sun gear 11 has a spline shape that is larger than the upward stroke of the tapping head 4,
The input gear 12 is always engaged with the sun gear 11, and the tap 19 continues to rotate, forming a tap hole in the plate material W placed on the table 41 above.

When the tapping head 4 has finished rising and the cylinder 38 is contracted and the tapping unit 13 is lowered together with the rotation stopper frame 18 by the restoring force of the spring 21, the tap 19 rotates in the opposite direction and is removed from the tap hole by the action of the tapping unit 13. It is pulled out and the work is completed.

Next, when performing processing with another tapping head 4, the projecting pin 37 is lowered to release the fixed position, and the turret rotation device 5 is operated again to bring the desired tapping head 4 to a new tapping position. do the work.

In the above embodiment, the tapping head 4 is mounted upward on the turret 1, so that the material plate W can be tapped from below the table 41. The tap may be processed from the top surface. In that case, the above-mentioned tapping device has a structure in which the top and bottom are all reversed, and the tapping head 4
The push-up device 38 essentially becomes a push-down device.

As described above, the tapping device of the present invention includes a plurality of tapping heads provided on the same circumference of a turret rotatably provided on a frame, a driving sun gear provided on the same axis as the rotation axis of the turret, and a driving sun gear provided on the same axis as the rotation axis of the turret. The input gears of each tapping head are engaged with each other so that all the tapping heads are constantly driven, and the selected tapping head moved by the push-up device taps the plate material. , the engaging/disengaging portion between the gears as in the conventional device described above is omitted, the drawbacks due to the presence of the engaging/disengaging portion are eliminated, gear wear is extremely low, and good operating conditions can be obtained for a long period of time. It also operates extremely smoothly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of the tapping device, FIG. 2 is a sectional view taken along the line -- in FIG. DESCRIPTION OF SYMBOLS 1... Turret, 2... Frame, 4... Tapping head, 7... Drive shaft, 11... Drive sun gear, 12
...Input gear, 15...Support tube, 16...Rotating shaft, 38
...Air cylinder, 39...Pushing member, T...Tapping position, W...Plate material.

Claims (1)

[Claims] 1. A plurality of tapping heads are provided on the same circumference of a turret rotatably provided on a frame, a driving sun gear is provided on the same axis as the rotation axis of the turret, and the input gear of each tapping head is meshed with the sun gear. A tapping device, characterized in that each tapping head is movable up and down with respect to a turret, and a device for pushing up the tapping head is provided below the turret.