JP2019063917A - Tool changer - Google Patents

Abstract

To provide a tool changer capable of housing a longer tool without increasing its footprint.SOLUTION: A tool changer (40) comprises a first tool magazine (41), a second tool magazine (42), a shifter (43), and an exchange arm (44). The first tool magazine (41) comprises a plurality of first tool pot holding parts (41b) which move in a first circulation path (R1). The second tool magazine (42) comprises a plurality of second tool pot holding parts (42b) which move in a second path (R2) existing on the inner side of the first circulation path (R1) when viewed in the normal direction of a plane (YZ) including the first circulation path (R1). The respective second tool pot holding parts (42b) hold a tool pot (P) so that a tool (T) projects toward the inside of te second path (R2) and the central axis (Ot) of the tool (T) is inclined relative to the plane (YZ).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tool changer for changing a tool between a spindle and a tool magazine containing a plurality of tools in a machine tool.

  DESCRIPTION OF RELATED ART Conventionally, various tool exchange apparatuses are known (for example, refer patent documents 1-3). Patent Document 1 discloses a tool changer provided with an annular tool magazine. The tool magazine is disposed on the side of the column such that the plane including the annular shape is along the front-rear direction. In the tool magazine, a plurality of tools are accommodated such that the central axis of the tools is perpendicular to the rotational axis of the horizontal spindle. A pot pivoting means is arranged between the tool magazine and the column. The pot pivoting means removes the selected tool pot from the tool magazine so that the central axis of the tool is parallel to the axis of rotation of the main spindle and the tip of the tool faces the inside of the tool magazine. Rotate the pot 90 degrees. An exchange arm is disposed between the pot pivoting means and the column. The exchange arm exchanges the tool pivoted by the pot pivoting means with the tool mounted on the spindle.

  Patent Document 2 discloses a tool changer including an annular tool magazine and a smaller annular sub tool magazine disposed inside the tool magazine. Each of the tool magazine and the sub-tool magazine is disposed on the side of the column such that a plane including the annular shape thereof extends in the front-rear direction. In each of the tool magazine and the sub-tool magazine, a plurality of tools are accommodated such that the central axis of the tools is perpendicular to the rotation axis of the lateral spindle. The tools stored in the sub tool magazine are once delivered to the tool magazine by the tool pot delivery means. Arranged on the side of the tool magazine is a tool pot pivoting means and a tool exchanging means similar to the pot pivoting means and the exchanging arm of Patent Document 1. With such a configuration, in addition to the tools contained in the tool magazine, the tools contained in the sub-tool magazine can be used.

  Patent Document 3 discloses a tool changer provided with a tool magazine having a circulating rotation locus. The tool magazine has a plurality of tool holding parts along a circulation rotation locus. Each of the tool holders includes two tool pots that are at 90 ° to each other so as to face the inside and the outside of the circulating rotational path, respectively. When the selected tool holder is disposed at the tool change position, the tool holder is configured to access the first tool posture accessible to the first tool pot or the second tool accessible to the second tool pot. Tool posture is rotated to either. Such a configuration makes it possible to use tools stored in both the first tool pot and the second tool pot.

Japanese Patent Application Publication No. 2003-94273 JP 2007-125642 A Patent No. 5925396 gazette

  In machine tools, tools of various shapes, for example, long tools may be used. Therefore, in machine tools, there is a need for a tool changer that can accommodate more tools and can accommodate longer tools. In this case, it is preferable that the long tool can be accommodated without increasing the occupied area.

  According to an aspect of the present disclosure, in a tool changer that changes a tool held on a spindle of a machine tool, a plurality of first tools removably holding a tool pot and moving a first circulation path along a plane. A first tool magazine having a tool pot holder according to claim 1, wherein the selected first tool pot holder is arranged in a first standby position, and the tool pot can be removed. And holding a plurality of second tool pot holders that move in a second path that is inside the first circulation path when viewed in the normal direction of the plane in which the first circulation path is included, A second tool magazine, wherein each of the second tool pot holders has a first circulation path with a central axis of the tool such that the tool protrudes toward the inside of the second path. Keep the tool pot so that it is inclined to the included plane And the second tool magazine may clamp and unclamp the tool pot with the second tool magazine, placing the selected second tool pot holder in the second standby position, And a shifter movable between the first standby position, the second standby position, and the next tool standby position, the shifter, the tool pot at the next tool standby position, and the spindle of the machine tool A tool changer comprising: an exchange arm exchanging tools between the two.

  In a tool changer according to an aspect of the present disclosure, a second tool magazine is provided inside a first tool magazine having a first circulation path along a plane. In the second tool magazine, the tool pot is held such that the central axis of the tool is inclined relative to the plane in which the first circulation path is included, so that the central axis of the tool is relative to the above plane Longer tools can be accommodated as compared to when the tool pot is held vertically or parallel. Also, since the tool pot is held such that the tool projects towards the inside of the second path, no additional space is required outside the second path, ie outside the first circulation path. Therefore, longer tools can be accommodated without increasing the occupied area.

  The first tool pot holder and the second tool pot holder may be capable of holding the same tool pot. In this case, a common tool pot can be used for the first tool magazine and the second tool magazine, and an increase in the type of tool pot can be prevented.

  Each of the first tool pot holders may releasably hold the tool pot such that the central axis of the tool is perpendicular to the plane in which the first circulation path is included. In this case, the first tool magazine can accommodate tools shorter than the second tool magazine. Therefore, both tool magazines can be used properly.

  The shifter may be pivotable about a pivot axis which is perpendicular to both the central axis of the tool in the first standby position and the central axis of the tool in the second standby position. In this case, the movement of the tool pot between the first standby position and the next tool standby position and the movement of the tool pot between the second standby position and the next tool standby position are the same pivot axis. It is realizable by the turning operation centering on.

  The first tool magazine has a shifter avoidance area in which no tool pot is held, and the shifter may be movable from the first standby position through the shifter avoidance area. In this case, when the shifter moves from the first standby position, a space for bypassing the tool pot is not necessary, and the shifter can be disposed at a position close to the first tool magazine. Therefore, the occupied area can be reduced.

  The spacing between the plurality of second tool pot holders may be greater than the spacing between the plurality of first tool pot holders. In this case, in the second tool magazine, an interval between adjacent tools is secured. Therefore, the contact between the long tools can be prevented.

  According to one aspect of the present disclosure, it is possible to provide a tool changer capable of accommodating a long tool without increasing the occupied area.

It is a top view of a machine tool provided with a tool changer concerning an embodiment. It is a left view of the machine tool of FIG. It is a figure explaining operation | movement of the tool changer of FIG. It is a figure explaining operation | movement of the tool changer of FIG. It is a figure explaining operation | movement of the tool changer of FIG. It is a figure explaining operation | movement of the tool changer of FIG. It is a figure explaining operation | movement of the tool changer of FIG. It is a figure explaining operation | movement of the tool changer of FIG. It is a figure explaining operation | movement of the tool changer of FIG. It is a figure explaining operation | movement of the tool changer of FIG.

  Hereinafter, a tool changer according to an embodiment will be described with reference to the attached drawings. The same or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted. The scale of the figures may have been changed to facilitate understanding.

  FIG. 1 is a plan view of a machine tool provided with a tool changer according to an embodiment. Referring to FIG. 1, machine tool 100 is a horizontal machining center. In other embodiments, machine tool 100 may be another machine tool, such as a vertical machining center, which may generally be provided with a tool changer. The machine tool 100 includes a bed 10, a column 20, a table 30, a tool changer 40, and a splash guard 50.

  The bed 10 may be fixed to, for example, a floor of a factory. The column 20 is provided on the bed 10 at the rear of the bed 10. The column 20 moves on the bed 10 along the rails 24 in the left-right direction (X-axis direction). A saddle 21 movable in the vertical direction (Y-axis direction) is provided on the front side surface of the column 20. A spindle head 22 projects forward from the front side surface of the saddle 21. The spindle head 22 supports the spindle 23 rotatably around a horizontal rotation axis Os. The tool T is mounted on the spindle 23. The table 30 is provided on the bed 10 in front of the column 20. The table 30 moves on the bed 10 along the rails 31 in the front-rear direction (Z-axis direction). The work can be attached to the table 30 through the pallet or directly attached thereto without the pallet. In the machine tool 100, the workpiece T mounted on the table 30 is processed by the tool T mounted on the main spindle 23. The movement of the column 20 in the X-axis direction, the movement of the saddle 21 in the Y-axis direction, and the movement of the table 30 in the Z-axis direction are controlled by the NC device.

  The tool changer 40 is provided on the left side of the column 20. The splash guard 50 has a processing chamber 51 and a tool storage chamber 52. The processing chamber 51 accommodates the bed 10, the column 20 and the table 30, and the tool storage chamber 52 accommodates the tool changer 40. A wall 53 is provided between the processing chamber 51 and the tool storage chamber 52. The wall 53 is provided with an opening 54 which can be opened and closed by a shutter (not shown).

  Next, the tool changer 40 will be described in detail. The tool changer 40 includes a first tool magazine 41, a second tool magazine 42, a shifter 43, and a change arm 44.

  FIG. 2 is a left side view of the machine tool of FIG. FIG. 2 mainly shows the tool storage room 52, and thus mainly shows the tool changer 40. As shown in FIG. In FIG. 2, a portion of the spindle 23 in the processing chamber 51 is visible through the opening 54. However, in FIG. 2, the other components present in the processing chamber 51 can not be viewed by the wall 53.

  Referring to FIG. 2, the first tool magazine 41 has a first magazine body 41 a and a plurality of first tool pot holders 41 b. The first magazine body 41a generally has an annular shape or a circular endless shape (or a closed linear shape). The first magazine body 41a is disposed on the side of the column 20 so that its endless shape is along the YZ plane. The direction of arrangement of the first magazine body 41a is not limited to this. The first magazine body 41a can be rotatably supported, for example, by a plurality of rollers provided on a frame (not shown). The first magazine body 41a is connected to an actuator such as a motor via a belt, a chain, and / or a gear (not shown). Thereby, as shown in FIG. 1, the first magazine body 41a is configured to rotate around a rotation axis Om1 parallel to the X-axis direction. The rotation of the first magazine body 41a is controlled by the machine controller.

  Referring to FIG. 2, the plurality of first tool pot holding portions 41 b are disposed along the endless shape of the first magazine body 41 a. Therefore, as the first magazine body 41a rotates, the plurality of first tool pot holding portions 41b form a circular first circulation path (or endless path) along a plane (in the present embodiment, the YZ plane). ) Move R1. The first magazine body 41a is configured to be able to rotate completely, and therefore, the route R1 is a circulation route. The first tool magazine 41 is configured to arrange the selected first tool pot holder 41b at the first standby position S1.

  Each of the first tool pot holding portions 41 b detachably holds the tool pot P inside the first magazine body 41 a. The first tool pot holding portion 41 b can include, for example, elastic means such as a leaf spring that protrudes toward the inside of the first magazine body 41 a. Referring to FIG. 1, in the first tool pot holder 41b, the central axis Ot of the tool T is perpendicular to a plane (in the present embodiment, the YZ plane) in which the first circulation path R1 is included. As such, hold the tool pot P. In another aspect, the first tool pot holder 41 b holds the tool pot P such that the central axis of the tool T is parallel to the rotation axis Om 1 of the first tool magazine 41. The tool pot P removably accommodates the tool T using known means not shown. In the first tool pot holder 41b, a standard or relatively short tool T is accommodated.

  The second tool magazine 42 is disposed inside the first tool magazine 41 when viewed in the normal direction (in the present embodiment, the X direction) of the plane in which the first circulation path R1 is included. Referring to FIG. 2, the second tool magazine 42 includes a second magazine body 42 a and a plurality of second tool pot holders 42 b. The second magazine body 42a has a generally fan-like shape. The shape of the second magazine body 42a is not limited to this, and in another embodiment, the second magazine body 42a is a first magazine viewed in the normal direction of the plane including the first circulation path R1. Inside the tool magazine 41, it may be of any shape that can be moved along a predetermined path. Referring to FIG. 1, the second magazine main body 42a is disposed inside the first magazine main body 41a, and has an annular central axis Om1 of the first tool magazine 41 and a second tool magazine. The 42 fan-shaped central axes Om2 are aligned.

  More specifically, referring to FIG. 2, the second magazine body 42 a is a generally fan-shaped frame, and is centered inward from both ends of the arc-shaped first portion 42 c and the first portion 42 c. And a pair of second portions 42d extending toward the axis. The first portion 42c and the pair of second portions 42d may be integrally formed, or may be separately formed and connected to each other. The first portion 42c can have, for example, an arc shape of about 120 ° to 180 °.

  As shown in FIG. 1, the second portion 42 d first extends inward from the end of the first portion 42 c and then bends in a direction away from the bed 10. With such a configuration, the second magazine body 42 a protrudes along the central axis Om 2 and passes through the inside of the first tool magazine 41. Referring to FIG. 2, the pair of second portions 42 d are connected to each other on a central axis of the arc shape to form a rotation center portion 42 e.

  The rotation center 42 e is connected to an actuator (for example, a motor or the like) different from the actuator of the first tool magazine 41. As shown in FIG. 1, the second magazine body 42a is configured to rotate around a rotation axis Om2 parallel to the X-axis direction. The rotation of the second magazine body 42a is controlled by the machine controller. The rotation of the second tool magazine 42 can be controlled independently of the rotation of the first tool magazine 41.

  Referring to FIG. 2, the plurality of second tool pot holding portions 42 b are disposed along the first portion 42 c of the second magazine body 42 a. Therefore, as the second magazine body 42a rotates, the plurality of second tool pot holders 42b move in the circular second path R2. As apparent from FIG. 2, the circular second path R2 is a first circulation path R1 when viewed in the normal direction (in the present embodiment, the X direction) of the plane in which the first circulation path R1 is included. Inside. The second path R2 is along the YZ plane, like the first circulation path R1. The second magazine body 42a may rotate completely. In this case, the second route R2 is a circulation route. Also, the second magazine body 42a may not rotate completely (ie, may move between any two points in the circumferential direction). In this case, the second route R2 is not a circulation route.

  The second tool magazine 42 normally does not interfere with the movement of the tool pot P between the first tool magazine 41 and the shifter 43, so that the normal to the plane including the first circulation path R1. When viewed in the direction (in the present embodiment, the X direction), it is located at an avoidance position (for example, the position shown in FIG. 2) which does not overlap with the shifter 43. Further, when moving the tool pot P between the second tool magazine 42 and the shifter 43, the second tool magazine 42 waits for the second selected tool pot holder 42b as a second standby. It arrange | positions to position S2 (refer FIG. 1). The second standby position S2 is located at the same angle as the first standby position S1 in the circumferential direction of the first tool magazine 41. Further, the second standby position S2 is located inward of the first standby position S1 in the radial direction of the first tool magazine 41.

  Each of the second tool pot holding portions 42 b detachably holds the tool pot P. The second tool pot holding portion 42b protrudes so as to be directed to the inside of the second magazine body 42a, and to be inclined with respect to a plane (YZ plane) in which the first circulation path R1 is included. It can include elastic means such as a spring. The second tool pot holder 42b is a plane (YZ) in which the central axis Ot of the tool T includes the first circulation path R1 such that the tool T protrudes toward the inside of the second path R2. The tool pot P is held so as to be inclined with respect to the flat surface). More specifically, the second tool pot holder 42b holds the tool pot P so that the tool T penetrates or at least partially passes inside the first tool magazine 41. The first tool pot holder 41 b and the second tool pot holder 42 b can hold the same tool pot P. The second tool pot holder 42b accommodates a relatively long tool T.

  The spacing between the plurality of second tool pot holding portions 42 b is larger than the spacing between the plurality of first tool pot holding portions 41 b. Specifically, in the present embodiment, the first tool magazine 41 has 36 first tool pot holders 41b, and therefore, the first tool pot holders 41b are in the circumferential direction. At 10 ° intervals. The second tool magazine 42 has five second tool pot holders 42b in the region of 120 ° or about 120 °, so the second tool pot holder 42b is 30 ° or about It is arranged at an interval of 30 °. It will be understood that the number and spacing of the first tool pot holder 41b and the second tool pot holder 42b are not limited to these values, and may be other values in other embodiments.

  Referring to FIG. 1, the shifter 43 has a first tool pot holder 41b at a first standby position S1, a second tool pot holder 42b at a second standby position S2, and a next tool standby. The tool pots P can be moved relative to each other between the position S3. The shifter 43 is disposed between the column 20 and the first tool magazine 41. The shifter 43 has a claw-like clamp mechanism 43a capable of clamping and unclamping the tool pot P. The shifter 43 is pivotable about the pivot axis 43b. As shown in FIG. 1, the pivot axis 43b is perpendicular to both the central axis Ot of the tool T in the first standby position S1 and the central axis Ot of the tool T in the second standby position S2. is there. The shifter 43 moves between the first standby position S1, the second standby position S2, and the next tool standby position S3 around the pivot axis 43b. As shown in FIG. 1, the next tool standby position S3 is located at the same angle as the first standby position S1 and the second standby position S2 in the circumferential direction of the first tool magazine 41. Further, the next tool standby position S3 is located inside the first standby position S1 and the second standby position S2 in the radial direction of the first tool magazine 41. The pivot angle between the first standby position S1 and the next tool standby position S3 is, for example, 90 °, and the pivot angle between the second standby position S2 and the next tool standby position S3 is, for example 45 ° or It is about 45 °. The pivoting movement of the shifter 43 is controlled by the machine control device.

  The exchange arm 44 exchanges the tool T between the tool pot P located at the next tool standby position S3 and the spindle 23. The exchange arm 44 is disposed between the column 20 and the shifter 43. The exchange arm 44 has an arm portion 44a and a shaft portion 44b. The shaft portion 44 b is parallel to the rotation axis Os of the main shaft 23. The arm portion 44a radially extends on both sides from the tip end of the shaft portion 44b, and includes grippers gripping the tool at both ends. The arm portion 44 a is capable of translational movement parallel to the rotation axis Os of the main shaft 23 and rotation movement within a plane (XY plane) perpendicular to the rotation axis Os of the main shaft 23. These movements can be realized by a cam mechanism (not shown) or the like. The translational and rotational movement of the exchange arm 44 is controlled by the machine controller.

  Next, the operation of the tool changer 40 will be described. 3 to 10 are diagrams for explaining the operation of the tool changer of FIG. 3 to 10 show enlarged views of a region including the shifter 43 and the exchange arm 44 in the machine tool 100 shown in FIG.

  In FIG. 3, the tool T is mounted on the main spindle 23, and the shifter 43 holds the next tool T at the next tool standby position S3. In FIG. 3, the tool T of the spindle 23 is shorter than the tool T of the next tool standby position S3. An empty first tool pot holder 41b is located at the first standby position S1. The second tool magazine 42 is located in the avoidance position, so the second standby position S2 is empty.

  As shown in FIG. 3, when a tool change command is issued, first, a shutter (not shown) opens, and the processing chamber 51 and the tool storage chamber 52 communicate with each other through the opening 54. Subsequently, as shown in FIG. 4, the exchange arm 44 is rotated by 90 ° to grip the tool T of the main spindle 23 and the tool T of the next tool standby position S3. After the tool T is gripped, the spindle 23 unclamps the tool T.

  Subsequently, as shown in FIG. 5, the exchange arm 44 translates so as to pull out both tools T from the spindle 23 and the tool pot P of the shifter 43, and subsequently rotates 180 °, and subsequently both tools T It is translated to be inserted into the tool pot P of the main shaft 23 and the shifter 43. Both tools T are exchanged by this. After the tool T is inserted, the spindle 23 clamps the tool T. The exchange arm 44 is rotated 90 °, and the exchange arm 44 is removed from both tools T. When processing is performed, the shutter may be closed, or the processing chamber 51 and the tool storage chamber 52 may be shut off.

  Subsequently, as shown in FIG. 6, the shifter 43 turns by 90 ° from the next tool standby position S3 to the first standby position S1. As a result, the tool pot P fits into the first tool pot holding portion 41b against the biasing force of the elastic means such as a leaf spring. After the tool pot P is held by the first tool pot holder 41b, the shifter 43 unclamps the tool pot P.

  Subsequently, as shown in FIG. 7, the first tool magazine 41 is rotated to allow the shifter 43 to access the second standby position S2, and the tool pot P is not held empty. The first tool pot holder 41b (shifter avoidance area) is disposed at the first standby position S1. In this regard, the shifter 43 needs to move from the first standby position S1 to the second standby position S2 in order to access the second standby position S2. In this case, when the tool pot P is disposed at the first standby position S1, the shifter 43 can not move from the first standby position S1 to the second standby position S2, because the tool pot P and the shifter This is because 43 interferes with each other. Therefore, the first tool magazine 41 has a shifter avoidance area for moving the shifter 43 from the first standby position S1. As the shifter avoidance area, for example, as shown in FIG. 7, an empty first tool pot holder 41 b having no tool pot P can be used. In this case, for example, when a certain tool T of the first tool magazine 41 is used for the main shaft 23, as shown in FIG. 2, the two first tool pot holders 41b become empty. Also, for example, a space (a space in which the tool pot P can not be disposed) in which even a flat spring is not provided may be provided in the first tool magazine 41 as a shifter avoidance area.

  Subsequently, as shown in FIG. 8, the shifter 43 turns from the first standby position S1 to the second standby position S2. Subsequently, as shown in FIG. 9, a second tool pot holder 42b for rotating a second tool magazine 42 and holding a relatively long tool T to be used next is a second standby position S2 Will be placed. The shifter 43 clamps the tool pot P.

  Subsequently, as shown in FIG. 10, the shifter 43 turns and pulls the tool pot P from the second tool pot holding portion 42b against the biasing force of the elastic means such as a leaf spring, and the shifter 43 It turns from the second standby position S2 to the next tool standby position S3. The relatively long tool T stands by at the next tool standby position S3 until the next tool change command is issued. When the next tool change command is issued, the tool T is changed by an operation similar to the operation shown in FIGS.

  As described above, in the tool exchange device 40 according to the embodiment, the second tool magazine 42 is provided inside the first tool magazine 41 having the first circulation path R1 along the YZ plane. As shown in FIG. 1, in the second tool magazine 42, the tool pot P is held such that the central axis Ot of the tool T is inclined with respect to the YZ plane in which the first circulation path R1 is included. Therefore, a longer tool T can be accommodated as compared to the first tool magazine 41. Further, since the tool pot P is held such that the tool T protrudes toward the inside of the second path R2, an additional space is provided outside the second path R2, that is, outside the first circulation path R1. Is not necessary. Therefore, a longer tool T can be accommodated without increasing the occupied area.

  Further, in the tool changer 40, the first tool pot holder 41b and the second tool pot holder 42b hold the same tool pot P. Therefore, a common tool pot P can be used for the first tool magazine 41 and the second tool magazine 42, and an increase in the type of tool pot P can be prevented.

  Further, in the tool changer 40, each of the first tool pot holding portions 41b detachably holds the tool pot P such that the central axis Ot of the tool T is perpendicular to the YZ plane. Therefore, the first tool magazine 41 can accommodate a shorter tool T as compared to the second tool magazine 42. Thus, the first tool magazine 41 can be used to accommodate relatively short tools T, and the second tool magazine 42 can be used to accommodate relatively long tools T, both tools You can use different magazines.

  In the tool changer 40, the shifter 43 is perpendicular to both the central axis Ot of the tool T at the first standby position S1 and the central axis Ot of the tool T at the second standby position S2. It is pivotable about pivot axis 43b. Therefore, the movement of the tool pot P between the first standby position S1 and the next tool standby position S3 and the movement of the tool pot P between the second standby position S2 and the next tool standby position S3 It is realizable by the turning operation centering on the same turning axis 43b.

  Further, in the tool changer 40, the first tool magazine 41 has a shifter avoidance area in which the tool pot P is not held, and the shifter 43 is movable from the first standby position S1 through the shifter avoidance area. is there. Therefore, when the shifter 43 moves from the first standby position S1, there is no need for a space for bypassing the tool pot P, and the shifter 43 can be disposed at a position close to the first tool magazine 41. . Therefore, the occupied area can be reduced.

  Further, in the tool changer 40, the spacing between the plurality of second tool pot holders 42b is larger than the spacing between the plurality of first tool pot holders 41b. Therefore, in the second tool magazine 42, the interval between adjacent tools T is secured. Therefore, the contact between the long tools T can be prevented.

  Although the embodiment of the tool changer has been described, the present invention is not limited to the above embodiment. Those skilled in the art will appreciate that various modifications of the above embodiments are possible. For example, in the above embodiment, the first tool magazine 41 is of a type that rotates the annular first magazine body 41a to which the plurality of first tool pot holding portions 41b are attached, and the first circulation is performed. The route R1 is circular. However, in another embodiment, the first tool magazine is of a type in which, for example, the plurality of first tool pot holders can be moved on a guide rail having an endless shape such as an ellipse, an oval or a polygon. In this case, the first circulation path may be an ellipse, an oval or a polygon. The second path R2 of the second tool magazine 42 may likewise be of various shapes.

  In this embodiment, although the embodiment of the method of holding the tool in the tool magazine via the tool pot has been described, the present invention can be applied to a potless tool changer of the method of holding the tool directly in the tool magazine. The difference between the two is whether each component holds the tool through the tool pot or directly without the tool pot.

DESCRIPTION OF SYMBOLS 10 bed 20 column 21 saddle 22 spindle head 23 spindle 24 rail 30 table 31 rail 40 tool changer 41 1st tool magazine 41a 1st magazine main body 41b 1st tool pot holding part 42 2nd tool magazine 42a 2nd Magazine body 42b Second tool pot holding portion 42c First portion 42d Second portion 42e Rotation center portion 43 Shifter 43a Clamping mechanism 43b Pivoting axis 44 Replacement arm 44a Arm portion 44b Shaft portion 50 Splash guard 51 Machining chamber 52 Tool Storage room 53 Wall 54 Opening 100 Machine tool Om1 Central axis Om2 Central axis Os Rotation axis Ot Central axis P Tool axis R1 First circulation path R2 Second path S1 First standby position S2 Second standby position S3 Secondary tool Standby position T tool

Claims (7)

In a tool changer that changes a tool held on a spindle of a machine tool,
A first tool magazine having a plurality of first tool holders for releasably holding tools and for moving a first circulation path along a plane, the selected first tool holder Placing the tool in a first standby position;
A second tool holding part removably holding a tool and having a plurality of second tool holding parts moving in a second path that is inside the first circulation path when viewed in the normal direction of the plane; A tool magazine, wherein each of the second tool holders is such that a tool protrudes toward the inside of the second path, and a central axis of the tool is the first circulation path A second tool holding the tool so as to be inclined relative to the contained plane, wherein the second tool magazine places the selected second tool holder in a second standby position With the magazine,
A shifter capable of clamping and unclamping the tool, and movable between the first standby position, the second standby position, and a next tool standby position;
An exchange arm for exchanging the tool at the next tool standby position with the tool at the spindle of the machine tool;
A tool changer comprising: In a tool changer that changes a tool held on a spindle of a machine tool,
A first tool magazine having a plurality of first tool pot holding portions for removably holding a tool pot and moving a first circulation path along a plane, the first selected magazine. A first tool magazine, wherein the tool pot holder is disposed at a first standby position;
A plurality of second tool pot holders for removably holding a tool pot and for moving a second path inside the first circulation path when viewed in the direction normal to the plane; The tool magazine of claim 2, wherein each of the second tool pot holders is such that a tool protrudes inward of the second path, and a central axis of the tool is the first The tool pot is held so as to be inclined with respect to the plane in which the circulation path is included, and the second tool magazine places the selected second tool pot holder in a second standby position. , The second tool magazine,
A shifter capable of clamping and unclamping the tool pot and movable between the first standby position, the second standby position, and the next tool standby position;
An exchange arm for exchanging a tool between the tool pot at the next tool standby position and a spindle of a machine tool;
A tool changer comprising:   The tool change device according to claim 2, wherein the first tool pot holder and the second tool pot holder can hold the same tool pot.   Each of the first tool pot holders removably holds the tool pot so that the central axis of the tool is perpendicular to the plane in which the first circulation path is included. The tool changer according to claim 2.   The shifter is pivotable about a pivot axis which is perpendicular to both the central axis of the tool in the first standby position and the central axis of the tool in the second standby position. The tool changer according to claim 2. The first tool magazine has a shifter avoidance area in which the tool pot is not held;
The tool changer according to claim 2, wherein the shifter is movable from the first standby position through the shifter avoidance area.   The tool changer according to claim 2, wherein a distance between the plurality of second tool pot holders is larger than a distance between the plurality of first tool pot holders.

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