JPS5835395Y2 - Tool magazine tool lock/unlock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool lock/unlock device that is detachably attached to a tool socket.

An object of the present invention is to reliably prevent the tool from falling off during indexing rotation of the tool socket and during rotation of the tool socket.

Another object of the invention is to utilize the pivoting motion of the tool socket to lock and unlock the tool.

Generally, a tool changer installed in a vertical machine tool is provided with a tool magazine that rotatably holds a large number of tool sockets into which tools are removably inserted.

This tool magazine usually holds the tool socket horizontally,
When the tool socket with the required tool inserted is indexed to the tool removal position, the tool socket is rotated from a horizontal state to a vertical state parallel to the spindle, and the tool is exchanged between this tool socket and the spindle by an exchange arm. Ru.

Therefore, in such a tool magazine, it is necessary to prevent the tools from falling off when the tool socket is indexed and rotated and when the tool socket is turned, and it is necessary to anorock the tools after the tool socket has been turned to the turning end.

For this reason, in the past, the rotating movement of the exchange arm was used or a cylinder device for locking and unlocking was provided, but this had the disadvantage of complicating the structure and increasing the cost.

The present invention was devised to eliminate these drawbacks of the conventional technology, and uses a lock shaft provided on each tool socket to prevent the tool from falling off when the tool socket is indexed and rotated. The present invention relates to a tool lock/unlock device that is attached to a tool magazine and that operates the lock shaft to an unlock position by utilizing the turning movement of the tool socket.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 10 indicates a tool magazine installed on the side of a column (not shown) of a vertical machine tool.
is rotatably supported.

This rotating shaft 12 includes a worm 13 and a worm wheel 1.
The rotation of the drive motor 19 is transmitted through the drive motor 4, and the magazine disk 16 fixed to the tip thereof is rotated and indexed.

A large number of holding pieces 17 are protruded from the outer periphery of the magazine disk 16 at equal intervals in the radial direction, and between the holding pieces 17, a large number of tool sockets 15 are pivotally supported by pivot pins 18. has been done.

The inward swinging of each tool socket 15 is regulated by a regulating bolt 21 so that its axis is maintained horizontally during rotational indexing of the magazine disk 16, and the outward swinging is regulated by a guide rail. It is regulated by 22.

This guide rail 22 is notched at the tool take-out position P, and allows the tool socket 15 indexed to the tool take-out position P to pivot.

Each of the tool sockets 15 is formed with a tapered insertion hole 23, as shown in FIG.
0 is inserted.

The tool 20 has at one end a pull stud 24 engaged by a pair of retaining pins 27.28 which are radially biased by springs 25.26.

One end of the holding pin 28 is inserted into a block 29 fixed to the tool socket 15, and a lock shaft 30 is fitted into the block 29 so as to be movable in a direction parallel to the axis of the tool socket 15. There is.

This lock shaft 30 has a recess 31 on its outer periphery, and by moving the lock shaft 30 back and forth in the axial direction against a spring 32, the recess 31 can be brought into correspondence with the holding pin 28. There is.

For example, the lock shaft 30 is connected to the holding pin 28 by the recess 31
When the holding pin 28 is moved to the axial position corresponding to the unlocked position, the holding pin 28 is allowed to retreat and the tool socket 15
When the outer peripheral surface of the lock shaft 30 moves to the axial position (lock position) corresponding to the holding pin 28, it prevents the holding pin 28 from retreating and prevents the tool 20 from being removed from the tool socket 15. This prevents the tool 20 from falling off.

The button 33 is a keyway, and the button 34 is a locking pin that engages with the keyway 33 to prevent the lock shaft 30 from being pulled out and to prevent rotation.

A contact member 35 contacts the lock shaft 30 to unlock the holding pin 28 when the tool socket 15 is turned to a vertical position, and also contacts the block 29 to restrict the turning end of the tool socket 15. It is.

Behind the tool socket 15 indexed to the tool take-out position P, a drive device 36 consisting of a turning cylinder device is provided.

This drive device 36 has a cylinder 37 formed on the base 11 and a piston 38 slidably fitted into the cylinder 37, and an engaging body 40 fixed on a piston rod 39 of the piston 38. The tool socket 15
The tool socket 15 is configured to reciprocate in a direction perpendicular to the axis of the tool socket 15 within the rotation plane of the tool socket 15.

As shown in FIG. 4, this engaging body 40 is provided with a relief space 41 parallel to the side surface of the tool socket 15 and having a width slightly larger than the width of the tool socket 15. A pair of engaging protrusions 42 located at
Similarly, on both sides of the tool socket, a pair of engagement rollers 43 are located outside the side surfaces of the tool socket 15 and are rotatably supported in a plane parallel to the turning plane of the tool socket 15. There is.

The pair of engagement rollers 43 and the guide grooves 44 formed in the pair of engagement protrusions 42 are engaged with each other on the sides of the tool socket 15, and the reciprocating movement of the engagement body 40 is controlled by the engagement structure with the tool socket 15. The signal is transmitted to the socket 15, and the tool socket 15 is rotated about the pivot pin 18.

The guide groove 44 has a width slightly larger than the diameter of the engagement roller 43 and is formed parallel to the indexing direction of the tool socket 15, so that the engagement roller 43 moves into the guide groove 44 when indexing the tool socket 15. You can pass through it freely.

45 is a through hole through which the contact member 35 passes.

Further, 53 in FIG. 1 indicates a spindle head mounted on the front surface of the column so as to be movable up and down, and this spindle head 53 has a spindle 54.
is rotatably supported around a vertical axis, and this upper shaft 5
A tool 20 is removably inserted into the lower end of 4.

Reference numeral 55 denotes an exchange arm for exchanging the tool 20 between the tool socket 15 vertically rotated at the take-out position P and the main shaft 54. It is supported by the arm support body so that it can rotate reversibly and move back and forth in the axial direction.

Next, the operation in the above configuration will be explained. While the workpiece is being processed by the tool 20 inserted into the main shaft 54, the drive motor 19 is operated to index the tool 20 to be used next to the tool take-out position P. The magazine disk 16 is indexed and rotated.

As a result, each tool rocket 15 with a tool 20 inserted therein is sequentially indexed to the tool ejection position P, and when the tool socket 15 into which the required tool 20 is inserted is indexed to the tool ejection position P, the magazine disc 16 The indexing rotation of the main shaft 54 is stopped, and in this state it waits until the machining by the tool 20 inserted into the main shaft 54 is completed.

When the predetermined machining with the tool 20 inserted into the spindle 20 is completed, the spindle head 53 is raised to the upper end position for tool exchange, and at the same time, the tool socket 15 indexed to the tool take-out position P is rotated. will be carried out.

That is, when the machining is completed, pressure oil is first supplied to the lower chamber of the cylinder 37, and the piston 38 and the engaging body 40 integral therewith are raised.

As a result, the tool socket 15 connected to the engaging body 40 via the engaging roller 43 is rotated about the pivot pin 18, and the axis of the tool socket 15 changes from the horizontal state shown by the solid line in FIG. 3 to the vertical state shown by the imaginary line in FIG. Posture or change to the state.

During the indexing of the tool socket 15 and the tool socket 1
5, the holding pin 28 corresponds to the outer peripheral surface of the lock shaft 30 and is prevented from retreating, thereby preventing the tool 20 from falling out of the tool socket 15.

However, when the tool socket 15 is turned to a predetermined angular position, the lock shaft 30 first comes into contact with the abutting member 35, and then the block 29 comes into contact with the abutting member 35, and the end of the rotation is regulated.

As a result, the lock shaft 30 compresses the spring 32 and the recess 31 retreats to the unlocked position corresponding to the holding pin 28, allowing the tool 20 to be removed from the tool socket 15.

In addition, in this state, the tool 20 is attached to the spring 25.2.
Since the tool 20 is held by the holding pins 27 and 27 which are biased by the tool 6, the tool 20 will not fall out of the tool socket 15 due to its own weight.

When the spindle head 55 is positioned at the rising end and the tool socket 15 at the tool take-out position P is rotated vertically, the exchange arm 55 is rotated by a predetermined angle and grips the main spindle 54 and the tool socket 15 at both ends. The used tool 20 removed from the main shaft 54 is moved to the tool socket by gripping the tool 20 inserted into the main shaft 54 and then moving the exchange arm 55 forward in the axial direction (downward), turning 180 degrees, and retreating in the axial direction (upward). The next tool 20 that has been inserted into the tool socket 15 and removed from the tool socket 15 is inserted into the main shaft 54, and then the exchange arm 55 is rotated back to its original position.

When the exchange arm 55 is returned to its original position, the spindle head 5
3 is lowered for machining a workpiece, and the tool socket 15 is swiveled from a vertical state to a horizontal state by the drive device 36, and in this state, the magazine disk is moved in order to index the next tool 20 to be used in the exchange position. 16 is rotationally indexed.

On the other hand, due to the rotation of the tool socket 15, the lock shaft 30
is still separated from the contact member 35, whereby the lock shaft 30 is advanced to the lock position by the repulsive force of the spring 32 and prevents the holding pin 28 from retreating, so that the tool 20 is locked.

As mentioned above, the present invention is configured such that each tool socket is provided with a lock shaft, and this lock shaft prevents the holding pin that engages with the pull stand of the tool from retreating, so that the indexing rotation of the tool socket is prevented. This has the advantage that the tool can be reliably prevented from falling off from the tool socket when the tool socket is rotated.

In addition, the present invention is configured to move the lock shaft between the lock position and the unlock position using the turning movement of the tool socket, so a special drive source is not required.
Further, since it is only necessary to install the abutting member on the fixed part, there is an advantage that the configuration is simple.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a front view of a tool magazine with some parts omitted, and Fig. 2 is a partial view of the tool magazine shown in Fig. 1.
An enlarged cross-sectional view taken along the line, Figure 3 is the ■- in Figure 1.
■An enlarged sectional view taken along the line, Figure 4 is I of Figure 3.
FIG. 3 is a cross-sectional view taken along the line V-IV. 10... Tool magazine, 15... Tool socket, 2
0...Tool, 27.28...Holding pin, 30...
Lock shaft, 35...Abutment member, 36..., Drive device, P...Tool removal position.

Claims (1)

[Scope of utility model registration request] A specific tool socket among a number of tool sockets into which tools are removably inserted is indexed and rotated to a tool take-out position, and this specific tool socket is rotated in a plane intersecting the index rotation direction to In a tool magazine adapted to take out tools, each tool socket has a holding pin that moves forward and backward in a direction perpendicular to the tool axis and engages with a pull stud of the tool by a spring force, and a direction in which the holding pin moves forward and backward. A lock shaft is provided which is moved back and forth in a direction perpendicular to the holding pin and is biased by a spring force to a lock position that prevents the holding pin from retreating, and is connected to the tool socket at the tool take-out position to hold the tool socket. A tool comprising: a drive device that rotates at a predetermined angle; and a contact member that comes into contact with the lock shaft when the tool socket rotates and moves the lock shaft to an unlocked position that allows the holding pin to retreat. Magazine tool lock/unlock device.