JPH0753926Y2 - NC router tool changer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool changing device for an NC router, which is capable of mounting a tool on the head of an NC router and reliably positioning the tool necessary for exchanging the tool. is there.

[0002]

2. Description of the Related Art In a conventional NC router tool changing device, a tool and a gear changing mechanism are mounted on a tool changing supporting base, the rotation of the motor is transmitted to a Geneva gear through the gear mechanism, and the Geneva gear is rotated to rotate the tool rotating base. Was to be positioned.

Then, the tool exchange support base is moved by the horizontal cylinder and the upper and lower cylinders to exchange the tools provided at the lower end of the head.

[0004]

However, since this tool changer uses the gear mechanism and the Geneva gear, backlash causes backlash and the tool is accurately positioned below the rotary shaft of the head. However, there is a problem that the tool may not be attached to the rotary shaft of the head.

Since a gear mechanism and a Geneva gear are used, and a horizontal cylinder is used, NC
The structure of the router is complicated and large, and when a large number of heads are mounted, the head structure becomes very large.

[0006]

SUMMARY OF THE INVENTION According to the present invention, one or a plurality of heads provided with a spindle motor in which a tool such as a drill or a cutter is mounted on a rotary shaft is mounted on a head structure, and the head structure is mounted on a rail. In an NC router adapted to move a wood workpiece positioned on a table by moving by means of a tool exchange support stand mounted in the vicinity of the head, mounted on a vertical cylinder and a vertical rotary cylinder for horizontal movement. , A tool magazine is mounted on the tool exchange support base, a tool rotary base is rotatably mounted on the support shaft mounted on the tool magazine, and a plurality of the tools are mounted around the rotary base to support the support. A shaft of a stepping motor is connected to the shaft, and a rotating portion around the stepping motor is connected to the tool turntable.

[0007]

In the present invention, the origin of the tool turntable is detected by the origin detection sensor of the tool magazine, and the relationship between the spindle motor and each position of the tool magazine is calculated by the stepping motor controller.

Further, the tools are arranged on the tool rotary table at substantially equal intervals, and the rotary part provided outside the stepping motor is driven to rotate the tool rotary table together for positioning.

When the tool mounted on the spindle of the head is to be replaced, first, the horizontal rotating vertical rotation cylinder is rotated to set the empty position of the tool on the tool rotary table as the spindle. When moved towards the mounted tool, the tool is spring fitted into the empty position of the tool turntable.

Therefore, when the clamp of the main spindle is released and the upper and lower cylinders are lowered to lower the tool turntable to a predetermined position,
The tool moves off the spindle and descends with the tool turntable.

At that position, the stepping motor is rotated, and the desired tool is positioned below the spindle of the head.

When the upper and lower cylinders rise again and the upper end of the tool on the tool turntable reaches the clamp position of the spindle, the upper end of the tool is fixed by the clamp of the spindle.

After that, when the horizontal movement vertical rotation cylinder is rotated to return the tool turntable to the original position, the spring fitting between the turntable and the tool is released, and the tool is fixed to the spindle. The tool turntable returns to its original position.

After that, the table moves, the head descends on the wood workpiece, and the wood workpiece is subjected to predetermined processing by the tool attached to the head.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 are NCs of an embodiment of the present invention.
In a front view, a plan view and a side view of the router, a rail 2 is mounted on a support base 1 and a head structure 3 is mounted on the rail 2.
It is supported to move from side to side.

A plurality of heads 4 (four in the figure) are mounted on the head structure 3, and a motor is mounted on each of these heads 4, and tools such as a drill and a cutter are mounted on the rotary shaft of the motor. It is installed.

A tool changing device 5 and a tool magazine 6 are mounted on the side of the head 4, and a large number of tools 7 are mounted on the tool magazine 6.

Further, a rail 8 is mounted on the support base 1 below the head 4, and a table 9 is mounted on the rail 8 so as to move to the front and rear of the head 4.

A duct 10 is attached to the upper part of the head 4, a valve (not shown) which is opened and closed by a cylinder 11 is provided in the duct 10, and a hose (not shown) is connected to the duct 10. The lower end of this hose is provided in the vicinity of the lower portion of the head 4, and is configured to suck chips and dust on the table 9.

In addition, as shown in FIGS. 4, 5 and 6, in the tool changing device 5, the upper and lower cylinders 13 are rotatably mounted on the supporting portion 12a of the upper portion of the base 12 by the rotating shaft 14. The upper and lower plates 15 are mounted on the drive shaft 13a of the upper and lower cylinders 13 so as to be vertically movable.

A vertically movable rotary cylinder 17 for horizontal movement is rotatably mounted on a support portion 15a of the upper and lower plates 15 by a rotary shaft 18.

The drive shaft 17a of the vertically movable rotary cylinder 17 for horizontal movement is pivotally mounted on one arm 20a of a rotary lever 20 rotatably supported by a rotary shaft 19 by means of a pivot shaft 21. The other arm 20b of the member 20 is provided with a roller 22 provided at the tip thereof so that the sliding portion 16a of the tool exchange support base 16 can be provided.
It is slidably mounted on.

A support shaft 23 is fixed to the tool magazine 6 fixed to the tool change support base 16.
A tool turntable 24 is rotatably mounted on the tool 3, and processing tools 7 such as a drill and a cutter are radially mounted on the tool turntable 24 in a radially attachable and detachable manner.

Further, a pivot shaft 25a of a servo motor 25 is connected to the support shaft 23, and an outer rotary portion 25b of the servo motor 25 is fixed to a tool rotary base 24.

A proximity switch 26 is fixed to the support shaft 23 of the tool magazine 6 as an origin sensor for detecting the origin, and a magnet 27 for operating the proximity switch 26 is fixed to the tool rotary table 24.

An optical sensor may be used instead of the proximity switch 26, and in the case of the optical sensor, a light emitting element is provided instead of the magnet 27.

In the NC router constructed as described above, the head structure is placed above the wood workpiece positioned on the table 9 in response to a command from a controller provided separately and a controller provided behind the rail 2. 3 moves, and the tool 7 connected to the rotary shaft of the motor of each head 4 is rotated by the cylinder 4b and sequentially descends with the motor to process the wood workpiece.

Various processes are applied to this wood product,
When the motor of the head 4 is stopped during the next processing, the horizontal movement vertical rotation cylinder 17 is driven to move the tool exchange support base 16 toward the head 4.

At this time, since the tool 7 is mounted on the head 4, the empty part of the tool rotary table 24 of the tool magazine 6 without the tool faces the tool 7 of the head 4.

When the empty part of the tool on the tool turntable 24 reaches the position of the tool 7 on the head 4, the tool on the head 4 is spring-fitted to the empty part of the tool turntable 24.

Then, the upper and lower plates 15 are lowered by the upper and lower cylinders 13, and the tool rotary table 24 is rotated and positioned by the stepping motor 25 at that position.
The desired tool 7 is selected.

When the upper and lower plates 15 are lifted again by the upper and lower cylinders 13, the tool 7 is mounted on the rotary shaft 4a of the head 4.

Then, a vertical rotation cylinder 1 for horizontal movement
When the tool 7 is rotated in the direction of the original position, the tool turntable 24 is returned to its original position by releasing the spring fitting of the tool 7 of the head 4.

After that, the head 4 is lowered by the spindle cylinder 4b, and the following processing is performed at a predetermined position of the wood workpiece.

In the present invention, since the servo motor 25 is used to rotationally position the tool rotary table 24 of the tool magazine 6 as described above, the tool changing device 5 becomes compact and a large number of heads are provided as shown in FIG. Even if the 4 and the tool changer 5 are provided, there is an advantage that the overall size is reduced.

[0032]

As described above, since the tool changing device for the NC router of the present invention uses the vertical rotating cylinder for horizontal movement, the size in the horizontal direction is limited, and the stepping motor is not used. Since the positions of the respective tools that are rotated and provided at equal intervals on the tool turntable are positioned, a complicated device such as a gear mechanism or a Geneva gear is not required, and the tool changer becomes compact, which results in NC. There is an advantage that the configuration of the router becomes compact.

[Brief description of drawings]

FIG. 1 is a front view of an NC router according to an embodiment of the present invention.

FIG. 2 is a plan view of the NC router of FIG.

3 is a side view of the NC router of FIG. 1. FIG.

FIG. 4 is a front view of a tool changing device of the NC router of FIG.

5 is a right side view of the tool changer of FIG.

6 is a left side view of the tool changer of FIG.

[Explanation of symbols]

 5 Tool Exchanger 6 Tool Magazine 7 Tool 12 Base 12a Support 13 Vertical Cylinder 14 Rotation Shaft 15 Vertical Plate 16 Tool Exchange Support 17 Rotation Cylinder 18, 19 Rotation Shaft 20 Rotation Member 21 Axis 22 Roll 23 Support Shaft 24 Tool Rotating Table 25 Stepping Motor 26 Proximity Switch 27 Magnet

Claims (2)

[Scope of utility model registration request] 1. A head structure is equipped with one or a plurality of heads provided with a spindle motor having a rotary shaft equipped with a tool such as a drill or a cutter, and the head structure is moved by a rail to be mounted on a table. In an NC router adapted to process a positioned wood workpiece, an upper and lower cylinders are connected to upper and lower plates mounted close to the head, and a vertical movement type rotary cylinder mounted on the upper and lower plates is attached to a tool exchange support base. , A tool magazine is mounted on the tool exchange support base, a tool rotary base is rotatably mounted on the support shaft mounted on the tool magazine, and a plurality of the tools are mounted around the tool rotary base. The NC which is mounted, the pivot shaft of a stepping motor is connected to the support shaft, and the rotating portion around the stepping motor is connected to the tool turntable. Router tool changer. 2. The tool changer for an NC router according to claim 1, wherein an origin detection sensor is mounted on the support shaft and the tool turntable of the tool magazine.