JPH0732238A - Tool exchange device - Google Patents

Abstract

PURPOSE:To provide a tool exchange device of which the whole device can be miniaturized, the selecting motion of tools can be operated at high speed, and the time required for exchanging tools can be-shortened. CONSTITUTION:A tool magazine 17 is formed into a flat plate shape. A plurality of holding grooves 18 are formed so as to be arranged in a straight line along the side edge of the tool magazine 17, in the condition in which they are opened in the same direction on the side edge of the tool magazine 17. Tools 13 are respectively detachably held in the respective holding grooves 18. A tool loader 26 is moved to the position corresponding to a selected tool 13. The tool 13 is taken out from or taken in to the holding groove 18 on the position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool changing device for selecting one tool from a plurality of tools held in a holding portion of a tool magazine and mounting it on a spindle.

[0002]

2. Description of the Related Art In a conventional tool exchanging device of this type, a tool magazine is formed in a disk shape, and a plurality of holding grooves for holding a tool in a detachable manner are formed on its outer periphery in a radial direction. Has been done.

When exchanging the tool, one tool is selected from the tools in the holding grooves by the indexing rotation of the tool magazine and is placed at the tool attaching / detaching position. In this state, one tool is taken out from the holding groove onto the intermediate arm, and then the tool is transferred to the tool exchange position corresponding to the tool exchange arm by the operation of the intermediate arm. At the same time that the tool changing arm receives the tool on the intermediate arm, it removes the tool on the spindle, mounts the received tool on the spindle, and returns the removed tool to the intermediate arm. The tool returned to the intermediate arm is returned to the holding groove vacated by the intermediate arm.

[0004]

However, in this conventional tool changer, since the tool magazine has a disk shape and the holding groove is formed on the outer periphery thereof, it cannot be used at the center of the tool magazine. A large space is formed. Therefore, not only is the tool magazine formed into a large-diameter disk shape that requires a large occupied space, but a drive mechanism such as a motor is provided at the end of the rotary shaft. Therefore, there is a problem that the tool changer becomes large in size and cannot be installed in a small empty space of the machine tool.

Further, in the conventional tool changing device, not only the intermediate arm is required, but also the actuator for rotating the tool magazine and the actuator for rotating the intermediate arm. Therefore, a mechanism for individually controlling those actuators is required, and the structure is complicated.

Further, holding grooves for holding the tools are provided at equal intervals on the outer circumference of the tool magazine. For this reason, when holding a large tool, the large tool may protrude into the portions of the holding grooves on both sides, and it may be impossible to hold the tool in the holding grooves on both sides. Therefore, the conventional tool changer requires a large occupied space, but has a poor tool accommodating efficiency.

Further, in this conventional tool changing device, the holding groove is formed on the outer periphery of the tool magazine in a state of being opened in the radial direction. Therefore, if the tool magazine is indexed and rotated at a high speed when the tool is selected, the tool may jump out of the holding groove due to centrifugal force. Therefore, the tool magazine cannot be indexed and rotated at high speed. Moreover,
Since the tool magazine and the intermediate arm are mechanisms that have separate actuators, a tool delivery time lag, that is, a waiting time occurs between them. In addition, as described above, when the tool is large across the holding grooves on both sides thereof, the rotation range of the tool magazine for selecting the tool becomes large, and the selection rotation time also becomes long. For these reasons, the conventional tool changing device has a problem that it takes a long time to perform the tool changing operation.

The present invention has been made by paying attention to the problems existing in such conventional techniques. It is an object of the present invention to provide a tool changing device which can be downsized as a whole, can be easily installed in a small empty space of a machine tool, and has a simple structure.

Another object of the present invention is to provide a tool changer capable of performing a tool selecting operation at high speed and shortening the time required for tool change.

[0010]

In order to achieve the above object, in the invention according to claim 1, one tool is selected from the tools respectively held in a plurality of holding parts of the tool magazine, A tool exchanging device which is mounted on a spindle and which is configured to return and mount a tool on the spindle to a vacant holding part, characterized in that each holding part is arranged in a straight line with the opening in the same direction. It is a thing.

Further, in the invention according to claim 2, in the tool changing device according to claim 1, a guide body extending along the arrangement direction of the holding portions is provided, and the guide body is provided with the holding portions. On the other hand, the tool loader for attaching and detaching the tool is movably supported.

Further, the invention according to claim 3 is the tool changer according to claim 1, characterized in that the plurality of holding portions are arranged at an equal pitch.
The invention according to claim 4 is characterized in that, in the tool changing device according to claim 1, a part or all of the holding portions are arranged at an unequal pitch.

Further, in the invention according to claim 5, in the tool exchanging device according to claim 2, when the tool loader is moved to the moving end on the spindle side, the tool gripping part of the tool loader is rotated. Then, a posture changing mechanism for changing the posture of the tool is provided so that the tool is along the axial direction of the spindle.

According to a sixth aspect of the present invention, in the tool changing apparatus according to the fifth aspect, the posture changing mechanism causes the tool loader to move by moving the tool loader when the tool loader is moved to a moving end. It is characterized in that it includes a rack that is relatively moved with respect to the rack, and a pinion that is rotated with the movement of the rack and that applies a turning force to the tool gripping portion of the tool loader.

[0015]

In the tool changer embodying the present invention,
When the tool is taken out from the tool magazine, the tool loader is moved along the guide body and is arranged at a position corresponding to one selected tool. After that, the tool is taken into the tool gripper of the tool loader from the holding groove of the tool magazine,
In this state, the tool loader is moved to the end of the guide together with the tool. Then, when the tool loader is moved to the moving end, the rack of the posture changing mechanism is moved by the movement of the tool loader, and a rotational force is generated in the pinion. This rotational force causes the tool gripping portion of the tool loader to rotate, so that the attitude of the tool is changed to a replacement state with respect to the replacement arm or the like.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a tool changing device embodying the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, a base 1 of a machine tool is provided with a table 2 at its front part, and a pallet having a work mounted thereon is detachably supported on the table 2. The saddle 3 is a base 1 via a pair of guide rails 4.
It is supported so as to be horizontally movable upward, and is moved to a position corresponding to the work by the rotation of the ball screw 5. Column 6
Is movably supported on the saddle 3 via a pair of guide rails 7 in a direction orthogonal to the moving direction thereof, and is moved toward or away from the work by the rotation of the ball screw 8.

The head 9 is supported by the column 6 so as to be vertically movable via a pair of guide rails 10, and is moved to a position corresponding to the work by the rotation of the ball screw 11. The main shaft 12 is rotatably supported by a head 9 by a motor (not shown), and a tool 13 is detachably attached to the tip thereof. The tool exchanging device 14 is arranged on the upper part of the base 1, and the tool exchanging device 14 sequentially exchanges and mounts a plurality of tools 13 on the spindle 12. The work on the rotary table 2 is subjected to predetermined processing by using a tool on the spindle 12.

Therefore, the tool changing device 14 will be described in detail. As shown in FIGS. 1 to 4 and 6, the horizontally long plate-shaped tool magazine 17 is fixed in a standing state on the frame 15 fixed to the base 1 and extends in the same direction as the axial direction of the main shaft 12. . The holding grooves 18 as a plurality of holding portions are formed in a straight line along the upper edge of the tool magazine 17, and are opened upward in the same direction. Further, in this embodiment, the arrangement pitches P of the holding grooves 18 are set to be the same.

As shown in FIGS. 1 to 6, the tool pot 19
Is detachably held in each holding groove 18 of the tool magazine 17, and groove-shaped engaging recesses 20 corresponding to both side edges of the holding groove 18 are formed on both sides of the outer surface thereof. The conical tapered hole 21 is formed at the center of the tool pot 19, and the rear conical portion of the tool 13 is detachably fitted into the tapered hole 21. The protrusion 13 is provided on the pull stud 22b at the rear end of the tool 13.
a is formed, the engaging ball 22 of the tool pot 19 is engaged with the protrusion 13a by the spring force of the spring 22a, and the tool 13
Is locked out.

By pulling the tool 13 forward, the engagement ball 22 retracts against the biasing force of the spring 22a, and the tool 13 is pulled out. Further, after the engaging ball 22 is retracted by pushing the tool 13 into the tapered hole 21, it is elastically engaged with the protrusion 13a, and the tool 13 is held by this engagement. The pin 23 is fixed to the upper part of the tool pot 19, and the tool pot 19 is housed in the holding groove 18 so that the pin 23 projects rightward in FIG.

As shown in FIGS. 2, 3, 4, 7, and 8, a pair of guide rails 24 and 25 as guides are laid on the frame 15 and arranged along the arrangement direction of the holding grooves 18. Parallel to each other. The tool loader 26 is movably supported on the guide rails 24 and 25, and is held by the tool loader 26 in the holding groove 18 of the tool magazine 17.
The tool 13 is attached and detached together with the tool pot 19.

The moving frame 27 of the tool loader 26 is supported on the guide rails 24 and 25 via a slide block 28 and a cam follower 29. As the ball screw 30 is rotated by the servo motor 52 shown in FIG. It is moved to a position corresponding to the selected tool 13 on 17. The rotating shaft 31 is supported by the moving frame 27 via a bearing 32 so as to be rotatable around a vertical axis, and a supporting plate 33 and a connecting plate 34 are fixed above and below the rotating shaft 31. The guide shaft 35 is provided between the support plate 33 and the connecting plate 34 and extends in parallel with the rotating shaft 31.

A pair of tool-holding arms 36 as tool-holding portions are suspended and fixed to the tip of the support plate 33, and are arranged to face selected holding grooves 18 on the tool magazine 17 as the moving frame 27 moves. It The elevating plate 37 is supported by a rotating shaft 31 and a guide shaft 35 via a slide metal 38 so that the elevating plate 37 can be moved up and down. And the lower position shown by. The tool attaching / detaching hook member 40 is fixed to the tip of the elevating plate 37, and an engaging groove 41 that opens to both sides is formed at the edge thereof.

Then, as shown in FIGS. 4 and 6, when the moving frame 27 is moved in the lateral direction with the tool attaching / detaching hook member 40 arranged in the lower position, each holding groove 18 of the tool magazine 17 is moved. The pin 23 of the tool pot 19 held by is inserted into and removed from the engagement groove 41 of the tool attachment / detachment hook member 40. Also, the pin 23 of one tool pot 19
The tool attaching / detaching hook member 40 is engaged with the engaging groove 41.
Is moved to the upper position, the tool pot 19 is lifted from the S1 position, is withdrawn from the holding groove 18, and is held between the tool holding arms 36. Then, the tool loader 26 is moved to the front moving end slightly ahead of the tool magazine 17, and the tool pot 19 is moved to the S2 position.

As shown in FIGS. 4, 7 and 8, the posture changing mechanism 42 is arranged on the tool loader 26 and the frame 15. That is, the rack 43 of the attitude changing mechanism 42 extends parallel to the axis of the main shaft 12, is supported by the moving frame 27 of the tool loader 26 so as to be relatively movable along the moving direction thereof, and is supported by the spring 44 via the rod 44a via the rod 44a. 26 is urged toward the front moving end side.
The pinion 45 is fixed to the lower end of the rotating shaft 31, and is attached to the rack 4
3 is meshed. The stopper 46 formed of a bolt is screwed to the frame 15 so as to adjust the position in the front-rear direction so as to correspond to the front moving end of the tool loader 26.

When the tool loader 26 is moved to the front moving end, the stopper 46 is engaged with the rack 43, and a moving force in the direction opposite to the urging direction of the spring 44 is generated in the rack 43. It Further, the moving force of the rack 43 rotates the pinion 45 and the rotating shaft 31 that fixes and supports the pinion 45, and the tool gripping arm 36 and the like move through the support plate 33 to the tool gripping arm 36 and the like. Is rotated from the S2 position to the S3 position side, and the posture of the tool 13 is changed to a state of extending in the same direction as the axial direction of the spindle 12. afterwards,
The tool 13 is lowered together with the tool pot 19 from the S3 position to the S4 position in FIG. 4 by lowering the lifting plate 37 and the tool attachment / detachment hook member 40 based on the operation of the lifting cylinder 39.

As shown in FIGS. 1 and 2, the tool pot support base 53 is fixed to the upper portion of the base 1, and a tool pot support groove 54 having an open upper portion is formed therein similarly to the holding groove 18. ing. Then, from the S3 position to S4
The tool pot 19 that has been moved to the position moves to the tool gripping arm 36.
To the inside of the tool pot support groove 54, and is temporarily held in the tool pot support groove 54.

As shown in FIGS. 3 and 4, the tool changing arm 47 is rotatable between the main shaft 12 and the tool changing device 14 about an axis parallel to the main shaft 12 and in the axial direction. It is movably supported and has tool grips 48 at both ends. Then, while the tool 13 is held by the tool pot support base 53 together with the tool pot 19 at the S4 position in FIG. 4, the tool exchanging arm 47 is rotated and moved in the axial direction, so that the tool 13 is covered. The grip portion 13b is pulled out from the tool pot 19 onto one of the tool grip portions 48 and mounted on the spindle 12. On the other hand, at the same time, the other tool gripping portion 48
As a result, the tool on the spindle 12 is extracted and returned and mounted in the tool pot 19 at the S4 position.

Next, the operation of the tool exchanging device for a machine tool constructed as described above will be described. In the tool changer 14, the tool loader 26 is arranged at the front ends of the guide rails 24 and 25 when the machine tool starts to operate, and the piston rod of the lifting cylinder 39 is depressed to hold the tool pot 19. The tool attaching / detaching hook member 40 is in the raised position. Therefore, the tool pot 19 is placed in the S2 position in FIGS. 4, 7, and 8 and is on standby. In this state, the rack 43 of the posture changing mechanism 42 closely faces the stopper 46 of the base 1.

At the time of tool exchange, the ball screw 30 is rotated at a low speed by the low speed rotation of the servo motor 52,
A forward moving force is applied to the tool loader 26. For this reason, the rack 43 is engaged with the stopper 46, and the rack 43 is caused to move relatively in the direction opposite to the urging direction of the spring 44. As a result, the tool holding arm 36 holding the tool pot 19 via the pinion 45 is rotated from the S2 position to the S3 position side, and the posture of the tool 13 is changed to a state of extending in the same direction as the axial direction of the spindle 12. It in this case,
The rotation of the servo motor 52 is low, and the S of the tool pot 19
Since the rotation from the 2 position to the S3 position is slow, the tool 1
There is no chance that 3 will pop out due to centrifugal force.

With the S3 position, the tool attaching / detaching hook member 4 is moved by the forward movement of the lifting / lowering cylinder 39.
0 is lowered, and the tool 13 moves together with the tool pot 19 with S
It is lowered from the third position to the S4 position and is inserted and held in the tool pot support base 53. After that, the tool exchanging arm 47 is rotated and moved in the axial direction, and the tool 13 of the tool pot 19 on the tool pot supporting base 53 is extracted onto one of the tool gripping portions 48 of the tool exchanging arm 47. Further, the tool 13 on the spindle 12 is pulled out by the other tool gripping portion 48 of the tool changing arm 47 by the rotation and movement of the tool changing arm 47 in the axial direction. Then, the tools 13 pulled out by both the tool grippers 48 are simultaneously replaced and attached to the spindle 12 and the tool pot 19, respectively. In this way, when the tool 13 is exchanged, the machining is started using the tool 13 newly attached to the spindle 12.

Although not shown, S3 position and S4 position
A shutter that can be opened and closed to cover the tool 13 is provided at the position so that chips and the like do not adhere to the tool 13 in the standby state and the temporarily placed state. This shutter is opened when the tool operation is changed.

Simultaneously with the start of this processing, the tool attachment / detachment hook member 40 is moved by the backward movement of the lifting cylinder 39.
Is raised and the used tool 13 is moved together with the tool pot 19 from the S4 position to the S3 position in FIG. Thereafter, the tool loader 2 is rotated along with the rotation of the ball screw 30 due to the low speed rotation of the servo motor 52 in the opposite direction.
6 is moved to the left in FIGS. 1 and 2 along the guide rails 24 and 25. By this movement, the posture changing mechanism 42
The rack 43 is returned by the spring force of the spring 44 of
The tool gripping arm 36 and the like are moved from the S3 position in FIGS. 4, 7 and 8 to the S2 position via the pinion 45 and the rotating shaft 31, and the attitude of the tool 13 is stored in the holding groove 18 of the tool magazine 17. It is changed to the enabled state.

When the tool 13 reaches the S2 position,
The rotation of the servo motor can be switched at high speed. For this reason,
The tool loader 26 is moved at a high speed to a position corresponding to a predetermined empty holding groove 18 of the tool magazine 17, and the tool 1
3 is disposed above the holding groove 18 which is vacant. In this state, the tool attaching / detaching hook member 40 is lowered to the S1 position side in FIG. 4 by the protruding operation of the lifting / lowering cylinder 39, the tool pot 19 is pulled out from between the tool gripping arms 36, and the tool magazine 17 is vacant. It is delivered to the holding groove 18.

Then, the tool loader 26 is moved to a position corresponding to the required holding groove 18 of the tool magazine 17 for tool selection by the high speed rotation of the servo motor 52 in the forward or reverse direction. Thereby, as shown in FIGS. 4 and 6, the tool gripping arm 36 is arranged corresponding to the selected one tool 13, and the pin 23 of the tool pot 19 is inserted into the engaging groove 41 of the tool attaching / detaching hook member 40.
Are engaged. In this state, the tool attachment / detachment hook member 40 is moved from the lower position to the upper position by the retracting operation of the lifting / lowering cylinder 39, and the tool pot 19 is extracted upward together with the tool 13 from the holding groove 18 and the tool gripping arm 36.
Is caught in between.

After that, the tool loader 26 is moved along the guide rails 24 and 25 to the front end portions thereof along with the high speed rotation of the ball screw 30 by the servomotor 52. Then, the rack 43 reaches the S2 position where the rack 43 closely opposes the stopper 46 of the attitude changing mechanism 42, and stops, and the tool 13 to be used next enters a standby state. After that, the tool exchange is performed in the same manner as described above.

As described above, in the tool changing device 14 of the first embodiment, the tool magazine 17 is formed in a flat plate shape, and the plurality of holding grooves 18 are formed in a straight line along the side edge thereof. For this reason, the tool magazine is formed in a large-diameter disk shape, and the entire apparatus can be made smaller than the conventional configuration in which a plurality of holding grooves are formed along the outer peripheral edge thereof. Therefore, it is possible to effectively utilize even a small empty space of the machine tool and easily install the tool changer in that space. For this reason, it is possible to contribute to downsizing of the entire machine tool. For example, if the tool changer is provided above the frame 15 of the machine tool as in the embodiment,
The machine tool can be slim and can be installed in a small space.

Further, in the tool exchanging device of this embodiment, since the tool magazine 17 is fixed, unlike the prior art, an actuator for operating the tool magazine is unnecessary. Therefore, the number of parts is reduced and the structure is simplified. In particular, if a servo motor is used as a motor for selecting a tool as in the embodiment, the tool loader 26 controls the servo motor so that the tool 1 on the tool magazine 17 moves from the S2 position.
When the tool loader 26 reaches the S2 position from the tool magazine 17 side and stops, after moving to the position 3 and stopping,
When the tool gripping arm 36 stops at the S2 position or the S3 position after turning, the braking force can be applied to the servo motor 52 itself by deceleration braking or the like, and deceleration and stop can be performed to prevent an impact. Therefore, a brake device, a stopper, a shock absorber, etc., which are separate from the servo motor 52, are not required, and the configuration is simplified as described above.

Moreover, since the servo motor is easy to control the speed, the linear movement speed and the turning speed of the tool pot 19 can be set to an optimum one according to the machining tact of the machine tool. Further, in the tool changing device 14 of this embodiment,
In the state where the tool magazine 17 is fixedly arranged, the tool loader 26 sets the selected one tool 13 on the tool magazine 17.
It is designed to be moved linearly to the position corresponding to. Therefore, unlike the conventional configuration in which the disc-shaped tool magazine is indexed and rotated to place one tool held in the holding groove on the outer periphery thereof at the tool attachment / detachment position, the tool selection operation speed is limited. I will not receive it. That is, even if the moving speed of the tool loader 26 is increased, there is no inconvenience such as the tool popping out, and the speed of tool selection and tool conversion can be increased. Moreover, it is possible to continuously move the tool between the selected position and the standby position and between the standby position and the temporary placement position, that is, the exchange position by driving one servo motor 52. For this reason,
There is no time lag between operations, that is, there is no waiting time, and the overall operation time required for tool change can be shortened.

[0041]

Another Embodiment Next, another embodiment of the present invention will be described with reference to FIGS. First, in the second embodiment shown in FIG. 9, a tool magazine 1 having a plurality of holding grooves 18 is provided.
7 are arranged at predetermined intervals in the vertical direction, and a large number of tools 13 are detachably held in holding grooves 18 of these tool magazines 17 via tool pots 19. And
The tool loader 26 has a predetermined tool magazine 1 at the moving end.
After moving up and down to the position facing 7
It is moved along the upper part of the groove 7 and is arranged so as to face the predetermined holding groove 18.

Further, in the third embodiment shown in FIG. 10, a part or all of the plurality of holding grooves 18 of the tool magazine 17, for example, the front holding groove 18 has the arrangement pitches P1 to P5. The arrays are formed in different states. Therefore, in the third embodiment, when holding a large tool, the holding grooves on both sides of the holding tool are not disabled, and the distance between the holding grooves 18 can be minimized according to the size of the tool. . Therefore, the tool storage efficiency is improved, a large number of tools can be stored, the movement stroke of the tool loader for tool selection can be reduced, and the time required for tool replacement can be further shortened.

Further, in the fourth embodiment shown in FIG. 11, the tool magazine is arranged so as to extend in the vertical direction,
A plurality of holding grooves 18 are formed on one side edge of the holding groove 18 so as to open laterally. In this embodiment, the stopper 5 made of a leaf spring is provided below the opening edge of each holding groove 18.
1 is provided, and this stopper 51 elastically engages with the tool pot 19 in the holding groove 18 so that the tool pot 19 does not naturally drop from the opening of the holding groove 18.

The present invention is not limited to the configuration of the above embodiment, but may be modified as follows. (1) Arrange tool magazines 17 in a plurality of rows in the left-right direction in FIG. 3 on the same horizontal plane. (2) The tool loader 26 is a clamp mechanism configured to clamp the tool pot 19 with a pair of arms. (3) In the above embodiment, the standby position of the tool 13 is the S2 position, but the standby position may be changed to another position such as the S3 position or the S4 position. (4) A cam mechanism or a link mechanism using the servomotor 52 is used as means for rotating the tool pot between the S2 position and the S3 position. (5) The tool changing device of the present invention is provided on the side surface or the lower surface of the machine tool.

[0045]

Since the present invention is constructed as described above, the entire apparatus can be downsized and can be easily installed in a small empty space of a machine tool. It can contribute to downsizing such as slimming of the entire machine tool.

Further, in the present invention, the number of parts can be reduced and the structure can be simplified. Further, according to the present invention, the tool changing operation can be performed at high speed, and the time required for the tool changing can be shortened.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a tool changing device embodying the present invention.

FIG. 2 is a plan view of the tool changing device.

FIG. 3 is a side view of the tool changer of the same.

4 is a partially cutaway side view showing a tool loader portion in an enlarged manner in the tool changing device of FIG. 3. FIG.

FIG. 5 is a partial cross-sectional view showing a tool and a tool pot in an enlarged manner.

6 is a partially enlarged cross-sectional view taken along the line AA of FIG.

7 is a partially enlarged plan view showing an operating state of a tool loader in the tool changing device of FIG.

FIG. 8 is a partial cross-sectional view showing an upward direction of a cross section of the tool loader in the operating state shown in FIG. 7;

FIG. 9 is a front view showing a second embodiment of a tool changing device embodying the present invention, and particularly showing a different configuration of the tool magazine portion.

FIG. 10 is a front view showing a third embodiment of a tool changing device embodying the present invention, and particularly showing a different configuration of the tool magazine portion.

FIG. 11 is a front view showing a fourth embodiment of a tool changing device embodying the present invention, and particularly showing a different configuration of the tool magazine portion.

[Explanation of symbols]

12 ... Spindle, 13 ... Tool, 14 ... Tool changer, 17 ...
Tool magazine, 18 ... Retaining groove, 19 ... Tool pot, 23
... pins, 24 ... guide rails as guides, 25 ... guide rails as guides, 26 ... tool loaders, 31 ...
Rotation axis, 36 ... Tool gripping arm as tool gripping part, 3
7 ... Elevating plate, 40 ... Tool attachment / detachment hook member, 41 ... Engagement groove, 42 ... Posture changing mechanism, 43 ... Rack, 45 ... Pinion, 46 ... Stopper, 47 ... Tool exchange arm.

Claims (6)

[Claims] 1. A tool magazine is selected from a plurality of tools held in a plurality of holding parts of a tool magazine, mounted on a spindle, and a tool on the spindle is returned and mounted to a vacant holding part. In the tool exchanging device described above, the holding parts are arranged in a straight line with the holding parts opened in the same direction. 2. A guide body extending along the arrangement direction of the holding portions is provided, and a tool loader for attaching and detaching a tool to and from the holding portions is movably supported on the guide bodies. The tool changer according to claim 1. 3. The tool changer according to claim 1, wherein the plurality of holding parts are arranged at equal pitches. 4. The tool changer according to claim 1, wherein a part or all of the holding parts are arranged at unequal pitches. 5. When the tool loader is moved to the moving end on the spindle side, the tool gripper of the tool loader is rotated to change the attitude of the tool so that the tool is along the axial direction of the spindle. The tool changing device according to claim 2, further comprising a posture changing mechanism. 6. The posture changing mechanism is a rack that is moved relative to the tool loader by the movement of the tool loader when the tool loader is moved to a moving end, and is rotated with the movement of the rack, The tool changing device according to claim 5, further comprising a pinion that applies a turning force to a tool gripping portion of the tool loader.