JPH0226596Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an automatic tool changer for inserting tools stored in a tool magazine into the main shaft of a vertical machine tool.

<Prior Art> In a conventional tool changing device for a vertical machine tool, it is necessary to rotate the tool in a vertical plane to change its posture so that the tool axis in the tool magazine stored state becomes parallel to the spindle axis. For this reason, JP-A-58-
As shown in Publication No. 22636, a pair of tool guide bars that guide the socket so as to be movable in the horizontal direction are provided so as to be rotatable around the horizontal axis, and a guide shaft is spline-fitted to the pair of tool guide bars. There is one in which a cam is formed on the cam and a cam follower that engages with the cam is provided on the fixed side.

<Problems to be solved by the invention> This device has a problem in that the provision of a pair of tool guide bars increases the size and complexity of the device. Furthermore, there is a problem that the overall length becomes longer due to the fact that the cylinder is connected in series to the guide shaft.

<Means for Solving the Problems> The present invention has a tool take-out device that is rotatably supported inside the drive device body around a horizontal axis in a plane parallel to the vertical plane in which the socket is rotated by the tool magazine. A rotating shaft having a cylinder formed in the axial direction, a cylindrical body fitted onto the outer periphery of the rotating shaft so as to be movable in the axial direction and prevented from rotating, and a rotating shaft connected to the cylindrical body in parallel with the rotating shaft. a piston rod that is fitted in a reciprocating direction in the cylinder; a drive device that rotates the rotating shaft; and a first guide that is provided around the cylindrical body and that engages with one side of the socket that is perpendicular to the direction of movement of the cylindrical body. a body, an engagement plate provided around the cylindrical body to face the first guide body and engaged with the other side of the socket, and a side surface of the socket with which the engagement plate engages around the cylindrical body. a U-shaped engagement member that is rotatable in a plane orthogonal to the socket and that engages and disengages from both sides of the socket that are perpendicular to the side surfaces of the socket that the engagement plate engages; The tube consists of a semicircular notch that engages with protrusions provided on both sides, and a pressing plunger that is provided around the cylindrical body and urges the engaging member in the direction of engaging the socket. A stopper is fixedly installed, which comes into contact with the engaging member and releases the engagement between the engaging member and the socket when the body moves horizontally toward the tool magazine.

<Operation> When the tool magazine is rotated and indexed with the cylindrical body moved forward, the plurality of sockets pass while being guided between the engagement plate and the first guide body, and the desired tool is inserted between the engagement plate and the first guide body. corresponds. When the cylinder is moved backward in this state, the engagement member engages with the socket by the pressing plunger, and the socket is held by the engagement member and the engagement plate. When the cylinder is retreated and rotated so that the socket faces downward, the second guide member corresponds to the notch of the guide member. When a tool exchange arm is used to exchange tools between the socket and the spindle, and the tool magazine is rotated and indexed, the second guide member and the guide member prevent the socket from popping out, and the storage position of the tool returned from the spindle is adjusted. It is indexed into the notch.
Next, rotate the cylindrical body so that the socket is horizontal from the downward position, and when the cylindrical body is moved forward, the engaging plate and the engaging member enter into the tool magazine, and the engaging member comes into contact with the stopper and engages. The part leaves the socket.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. In FIGS. 1 and 2, 10 is a vertical machining center, and a table slide 13 for guiding a table 12 is placed on a bed 11, and a spindle head 15 supporting a vertical main shaft 14 is moved vertically. A column 16 is guided so as to be slidable in the front and rear directions. Support stand 1 installed on the bed adjacent to the left side of this column 16
7, a tool magazine 18 is rotatably supported. A tool take-out device 19, which will be described later, is provided for this support stand 17, and takes out the tool along with the socket from the magazine, changes its posture, and puts it into a standby state. 20 is a tool exchange arm. The tool in the standby state and the tool inserted into the spindle are simultaneously exchanged by the axial movement and rotational movement of the tool exchange arm 20.
In addition, 21 is a chip conveyor, 22 is a coolant tank, and 23 is a chip box.

FIG. 3 is an enlarged view of the main part viewed from the direction of arrow A in FIG. The magazine disk 30 has a plurality of radial projections 30a on the circumference.
A socket S that protrudes and stores a tool (not shown) in a recess 30b formed between each protrusion 30a.
is accommodated, and the groove Sa formed on both sides of the socket S engages with the radial protrusion 30a.
As a result, each socket S is restrained from moving in the tool axis direction and circumferential direction with respect to the magazine disk 30, but is made detachable in the radial direction. In order to restrict the radial movement of this socket S, a guide member 31 surrounds the magazine disk 30.
are provided on the fixed portion, and the outer surface of each socket is slidably engaged with the inner circumferential surface of the guide member 31 to restrain the socket from protruding. A portion of this guide member 31 is removed corresponding to the tool take-out position C, and a first guide body 32 provided in the tool holding portion 19a of the tool take-out device 19 is located in this cut-out portion 31a. It is adapted to be aligned with the inner circumferential surface of the guide member 31. (Two-dot chain line state) Also, an L-shaped bracket 3 is attached to the tool holding portion 19a.
3 is fixed in a direction perpendicular to the axis of the tool in the held state, and a second guide body 34 is provided at the tip thereof. From the solid line state in Fig. 3, the tool holding part 19a
When rotated downward by 90 degrees, the second guide body 34 becomes
It is located in the notch 31a of the guide member 31 and acts as a guide for the socket.

Next, based on FIG. 4, the configuration of the drive section of the tool take-out device 19 will be explained.

Reference numeral 40 denotes a main body of the drive device fixed to the support base 17 of the magazine.A spline 41 is formed on the outer periphery of this main body 40, and a rotating shaft 43 with a cylinder 42 bored inside is only allowed to rotate by bearings 44, 44. It is mounted on a shaft. The cylinder 42 has a piston 4
The piston rod 46 of this piston rod 46 protrudes outward, and its tip is connected to a cylindrical body 47 that fits into the spline 41. The cylindrical body 47 is provided with the first guide body 32 forming the aforementioned tool holding portion 19a and an engagement plate 48 that faces the first guide body 32 and engages with the other side of the socket.

A pivot shaft 49 is protruded from the cylindrical body 47, and an engaging member 50 having a U-shaped cross section and engaging the side surface of the socket perpendicular to the engaging surface of the guide body 32 is pivotably mounted. U-shaped both legs 50 of this engagement member 50
A semicircular notch 51 is formed in a to engage with an engaging pin 52 protruding from the socket. Reference numeral 53 denotes a pressing plunger that presses the engaging member 50 in the engaging direction of the engaging pin 52, and has a built-in spring 54.

When the tool holding portion 19a is located at the tool removal position C, the engaging member 50 abuts against a stopper 60 protruding from the fixed portion, is rotated to the state shown by the two-dot chain line in FIG. 4, and is engaged. The engagement with the dowel pin 52 is disengaged. As the engaging member 50 separates from the stopper 60, the notch 51 of the engaging member 50 engages with the engaging pin 52.

A pinion 6 is attached to one end of the rotating shaft 43 on the main body side.
1 is formed and meshes with the rack bar 62.
The rack bar 62 is a cylinder 6 formed inside the main body.
The rotating shaft 43 is connected to the piston 64 of No. 3, and the rotating shaft 43 is rotated by the forward and backward movement of the piston 64, thereby rotating the spline-engaged cylinder body 47 and the tool holding portion 19a. As a result, the tool taken out from the magazine in the radial direction is rotated within the vertical plane, and the attitude of the tool is changed.

In the above embodiment, the cylindrical body 47 of the tool holding portion 19a
The configuration is such that the second guide body 34 is integrally fixed to the tool holding portion, but the present invention is not limited to this, and the guide body may be locked while allowing relative rotation with respect to the tool holding portion.
It is also effective to apply only the linear motion of the tool holder to the guide body and position it in the notch of the guide member.

<Effects of the invention> As described above, in the present invention, the cylindrical body holds the socket in a state where its movement in three directions is restricted, and the socket moves and changes its posture by moving the cylindrical body back and forth and rotating. With this configuration, there is no need to provide a tool guide bar for movably guiding the socket in the horizontal direction, and the effect of making the structure more compact and simple can be obtained. In addition, the structure is such that the cylindrical body is fitted to the rotating shaft so that it can move forward and backward, and the rotating shaft has a built-in cylinder that moves the cylindrical body forward and backward, so the device that moves the socket horizontally forward and backward and rotates can be made compact and structurally simple. You can get the effect easily. Furthermore, when the cylinder is inserted into the tool magazine, the engaging member comes into contact with the stopper and rotates to release the engagement with both sides of the socket. This provides the advantage of being able to perform rotational indexing.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a front view of a vertical machine tool, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged view of the main part from A in Fig. 1, and Fig. 4 is a sectional view taken along the - arrow in FIG. 3; 18...Magazine, 19...Tool take-out device,
19a...Tool holding part, 30...Magazine disc,
31... Guide member, 32... First guide body,
34...Second guide body, 43...Rotation shaft, 47
...Cylinder, S...Socket.

Claims (1)

[Scope of utility model registration request] A tool magazine that holds a plurality of sockets that hold tools in a horizontal state and rotates them in a vertical plane; a tool take-out device that takes out sockets horizontally from the tool magazine and rotates them downward from the horizontal state; In an automatic tool changer equipped with a tool changer arm that exchanges tools between a socket located in a vertical axis and a main shaft that rotates about a vertical axis, the tool take-out device is parallel to a vertical plane in which the socket is rotated by a tool magazine. A rotating shaft that is rotatably supported by the drive unit body around a horizontal axis in a plane and has a cylinder formed inside in the axial direction, and a cylinder that is fitted around the outer periphery of this rotating shaft so that it can move forward and backward in the axial direction and is prevented from rotating. a piston rod connected to the cylindrical body in parallel with the rotational shaft and fitted in a cylinder formed on the rotational shaft so as to be reciprocatable; a drive device for rotating the rotational shaft; and a socket provided around the cylindrical body. a first guide body that engages with one side surface perpendicular to the advancing and retracting direction of the cylindrical body; and a first guide body that is also provided around the cylindrical body in a manner facing the first guide body and engages with the other side surface of the socket. An engagement plate is provided around the cylindrical body so as to be pivotable in a plane orthogonal to the side surface of the socket with which the engagement plate engages, and the engagement plate engages and disengages from both side surfaces of the socket that are orthogonal to the side surface of the socket with which the engagement plate engages. A U-shaped engagement member, a semicircular notch formed on the engagement member that engages with protrusions provided on both sides of the socket, and a semicircular notch formed on the engagement member that engages with the projections provided on both sides of the socket, and the engagement member provided around the cylindrical body. and a pressing plunger that urges the tool in the direction of engagement with the socket, and when the cylindrical body moves horizontally toward the tool magazine side, it comes into contact with the engagement member and releases the engagement between the engagement member and the socket. An automatic tool changer characterized by a fixed stopper.