Tool magazine device

Abstract

To provide a tool magazine device which can prevent a phase error when attaching a tool to a tool holding gripper of front and rear racks of a magazine body.SOLUTION: A tool magazine device 1 comprises: a magazine body which has front and rear racks 4 provided with a tool holding gripper 41; a tool conveyance device 9 which takes out a tool from the racks 4 and attaches the tool to the racks 4; a tool standby pot 7 which holds the tool; and an in-magazine tool exchanger 8 which performs delivery of the tool between the tool standby pot 7 and the tool conveyance device 9. The tool conveyance device 9 comprises: a movable body 91 which is arranged between the racks 4 and moves in a Z-axis direction and a longitudinal direction of the racks 4; a base 92 which is provided so as to be rotatable around an axial line extending in the Z-axis direction in the movable body 91; a conveyance gripper 93 which is attached so as to be movable in a plane orthogonal to the Z-axis direction to the base 92; and an air cylinder which moves the conveyance gripper 93 in the plane.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a tool magazine device provided in a machine tool, for example, a machining center.

[0002] In this specification and claims, the lower side of FIG. 1 (the left side of FIGS. 3 and 4) will be referred to as the front, and the opposite side as the rear. [Background technology]

[0003] For example, to achieve long-term unmanned operation of a machining center, a tool magazine device with multiple tool holding sections and capable of storing a wide variety of tools is required. However, such a tool magazine device is large, resulting in a problem of increasing the installation area of ​​the entire machine tool. Furthermore, each tool holding section of the tool magazine device must be large enough to store tools of the maximum length and maximum diameter. However, depending on the type of machining to be performed on the workpiece, at least some of the tool holding sections may not store tools, or at least some of the tool holding sections may not store tools with the maximum length and / or maximum diameter, resulting in wasted space and reduced tool storage efficiency.

[0004] Therefore, a tool magazine device that solves such problems includes a frame, a magazine body that is detachably attached to the frame with the longitudinal directions facing in the same direction and that is made up of a plurality of front and rear racks that hold a plurality of tools so that the tool axis direction faces the Z-axis direction, which is the spindle axis direction, and a tool transport device that is attached to the magazine body so as to move in the Z-axis direction and the longitudinal directions of the front and rear racks and that takes out tools from and attaches tools to the front and rear racks, and a plurality of tool holding grippers that open rearward and hold tools are provided at intervals in the longitudinal direction on the front rack, and a tool transport device that opens only forward and is attached to the rear rack. A known tool magazine device has a plurality of tool holding grippers for holding tools, spaced apart in the longitudinal direction, the front and rear racks being spaced apart in the Z-axis direction, the tool transport device including a shifter that moves in the tool axis direction of the tool held by the tool holding grippers and in the longitudinal direction of the front and rear racks, and a magazine arm that is attached to the shifter at one end so as to be rotatable about an axis extending in the Z-axis direction and has a tool transport gripper at the other end, and the tool holding grippers of the front and rear racks are provided with tool phasing keys that fit into tool phasing key grooves formed in the shanks of the tool holders of the tools (see Patent Document 1).

[0005] According to the tool magazine device described in Patent Document 1, the arrangement of racks in the tool axis direction of the tools held by the tool holding gripper can be determined in advance according to the tool length and tool diameter, making it possible to efficiently store a wide variety of tools. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5658850 Summary of the Invention [Problem to be solved by the invention]

[0007] Generally, in tools conforming to DIN standards, CAT standards, HSK standards, etc., two tool phasing keyways are formed in the shank of the tool holder at 180-degree intervals in the circumferential direction, and the depths and widths of the two tool phasing keyways are different, with the depth and width of one tool phasing keyway being greater than the depth and width of the other tool phasing keyway.

[0008] In the tool magazine device described in Patent Document 1, tools are attached to and detached from the tool holding grippers of the front and rear racks simply by rotating the magazine arm, which means that the phases of the tools relative to the tool holding grippers of the front and rear racks are different. As a result, it is necessary to make the dimensions of the tool phasing key that is provided on the tool holding gripper of the front rack and fits into the tool phasing key groove different from those of the tool phasing key that is provided on the tool holding gripper of the rear rack and fits into the tool phasing key groove.

[0009] In this case, the small tool phasing key fits into the tool phasing key grooves of both tool holding grippers, so when an operator manually attaches tools to the racks of the tool magazine device for both racks, there is a risk that the phase of the tool relative to the tool holding grippers will be incorrect.

[0010] SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a tool magazine device which can prevent phase errors when attaching tools to the tool holding grippers of the front and rear racks of the magazine body. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention comprises the following aspects.

[0012] 1) A tool magazine device comprising: a frame; a magazine body which is detachably attached to the frame with its longitudinal directions facing in the same direction and which comprises a plurality of front and rear racks for holding a plurality of tools with the tool axis direction facing the Z-axis direction, which is the direction of the spindle axis; and a tool transport device which is attached to the magazine body so as to move in the Z-axis direction and the longitudinal directions of the front and rear racks and which removes tools from and attaches tools to the front and rear racks, wherein the front rack has a plurality of tool holding grippers which open to the rear and hold tools, and are spaced apart in the longitudinal direction, and the rear rack has a plurality of tool holding grippers which open to the front and hold tools, and are spaced apart in the longitudinal direction, the magazine comprises a tool standby pot that holds tools to be attached to a spindle of a machine tool and tools to be removed from the spindle, with the tool axis direction directed in the Z-axis direction, and an in-magazine tool changer that is provided in the magazine body so as to move relative to the tool standby pot in the Z-axis direction and that transfers tools between the tool standby pot and the tool transport device, The tool transport device comprises: a movable body disposed between the front and rear racks and movable in the Z-axis direction and in the longitudinal direction of the front and rear racks; a base provided on the movable body so as to be rotatable about an axis extending in the Z-axis direction; a transport gripper attached to the base so as to be movably mounted within a plane perpendicular to the Z-axis direction and which holds a tool with the tool axis direction facing the Z-axis direction; and an actuator attached to the base and which moves the transport gripper within the plane to move the transport gripper to a tool attachment / detachment position with respect to the tool holding gripper. And, The in-magazine tool changer is provided with tool gripping portions at both ends in the longitudinal direction and includes a swivel arm that is rotatable about an axis that passes through the center in the longitudinal direction and extends in the Z-axis direction, and the two tool gripping portions of the swivel arm are point-symmetrical with respect to a rotation center as the center of symmetry when viewed from the Z-axis direction, and the in-magazine tool changer transfers the tool between the tool standby pot and the transport gripper such that the state in which the tool is held in the tool standby pot and the state in which the tool is held in the transport gripper of the tool transport device are in opposite phases. Tool magazine device.

[0013] 2) A tool magazine device according to 1) above, in which a key is provided at the deepest part of the tool holding grippers of both the front and rear racks, which key fits into only the deeper and wider tool phasing key groove of two tool phasing key grooves provided on the tool holder and having different depths and widths.

[0014] 3) All In both the front and rear racks, there are a plurality of racks for holding tools of different lengths and diameters. 1) or 2) The tool magazine device described above. [Effects of the Invention]

[0015] the above 1)~3) According to this tool magazine device, the tool grippers on the front and rear racks of the magazine body have two tool phasing keyways formed in the shank of the tool holder, spaced 180 degrees apart in the circumferential direction, and when attaching tools whose depths and widths are different between the two tool phasing keyways, for example, tools conforming to the DIN, CAT, or HSK standards, if a tool phasing key is provided that fits only into the tool phasing keyway with the greater depth and width of the two tool phasing keyways with different dimensions, then when an operator manually attaches a tool to the tool grippers on both the front and rear racks, the tool phasing key will not fit into the tool phasing keyway with the smaller depth and width, so the phase of the tool relative to the tool grippers can always be kept correct, and it becomes possible to prevent phase errors when attaching tools to the tool grippers on both the front and rear racks.

[0016] Furthermore, when tools are attached to or detached from the front or rear racks of the magazine body, the base of the tool transport device rotates around the central axis of rotation to face one of the tool holding grippers on either the front or rear rack, and the actuator moves the transport gripper to the tool attachment / detachment position to hold or release the tool. However, if the tool phasing key groove, which has a small depth and width, is held by the tool holding gripper in an incorrect position facing the tool phasing key of the tool holding gripper, the transport gripper will not be able to move to the correct tool attachment / detachment position, and as a result, it will be possible to detect that the tool is being held in the tool holding gripper in an incorrect position.

[0017] Furthermore, when a tool is held on the rack, the base of the tool transport device rotates, so that the tool held on the transport gripper by the actuator can be moved toward the tool holding gripper of the rack with the tool phasing key groove, which has a large depth and width, facing the tool holding gripper of the rack. This allows the tool to always be held in the tool holding gripper in the correct state.

[0018] Furthermore, since both the front and rear racks are detachable from the frame, the mounting positions of the front and rear racks can be changed to suit the diameter and length of the tools to be stored, thereby eliminating wasted space and improving tool storage efficiency.

[0019] Furthermore, the above 1)The tool magazine device of the present invention provides the following advantages: In other words, if an automatic tool changer for a machine tool includes a tool change arm that has tool gripping portions at both longitudinal ends and is rotatable about an axis that passes through the longitudinal center and extends in the Z-axis direction, and both tool gripping portions of the tool change arm are point-symmetrical with respect to the center of rotation as viewed in the Z-axis direction, when the tool change arm rotates after removing a tool attached to the spindle from the spindle, the tool will be in the opposite phase to when it was attached to the spindle, and therefore it is necessary to provide the tool holding gripper of the rack with a tool phasing key that can fit into the tool phasing keyway that is deeper and wider than the two tool phasing keyways that have different dimensions. As a result, a tool phasing key that can fit into a tool phasing keyway with a small depth and width will also fit into a tool phasing keyway with a large depth and width, and it is not possible to obtain the effect of preventing phase errors when attaching tools to the tool holding grippers of the front and rear racks or the effect of detecting that a tool is being held in an incorrect state by the tool holding gripper, as described above. However, as in the tool magazine device of 3) above, if the in-magazine tool changer is provided with tool gripping portions at both longitudinal ends and a swivel arm that is rotatable about an axis extending in the Z-axis direction through the longitudinal center, and both tool gripping portions of the swivel arm are point-symmetrical with respect to the center of rotation as viewed in the Z-axis direction, and the in-magazine tool changer transfers the tool between the tool standby pot and the transport gripper so that the state in which the tool is held in the tool standby pot and the state in which the tool is held in the transport gripper of the tool transport device are in opposite phases, then the tool holding gripper of the rack can be provided with a tool phasing key that can fit only in the tool phasing keyway that is deeper and wider than the two tool phasing keyways that have different dimensions, and as a result, it is possible to prevent phase errors when attaching tools to the tool holding grippers of the front and rear racks as described above, and to detect when a tool is being held in an incorrect state by the tool holding gripper. [Brief explanation of the drawings]

[0020] [Figure 1]1 is a partially omitted plan view showing the schematic configuration of a horizontal machining center equipped with a tool magazine device according to the present invention; [Figure 2] 1 is a perspective view of a tool magazine device according to the present invention with a portion thereof omitted; [Figure 3] FIG. 2 is a right side view showing the magazine body of the tool magazine device and the tool transport device. [Figure 4] FIG. 2 is an enlarged right view showing an automatic tool changer that changes tools attached to the spindle of a horizontal machining center, and an in-magazine tool changer and tool transport device of a tool magazine device. [Figure 5] 10A to 10C are diagrams showing a method for attaching and detaching tools to and from a rack of a tool magazine device by a tool transport device in the order of steps. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0022] In the following description, the top and bottom and left and right of FIG. 2 will be referred to as top and bottom and left and right.

[0023] FIG. 1 shows a schematic configuration of a horizontal machining center equipped with a tool magazine device according to the present invention, and FIGS. 2 to 4 show the tool magazine device according to the present invention. FIG. 5 shows a method of loading and unloading tools onto and from the rack of the magazine body by a tool transport device in the order of steps. 1 to 4, the tool magazine device 1 is attached to a spindle 101 of a horizontal machining center 100 whose axis direction faces the left-right direction and stores a wide variety of tools such as long tools 102, short tools 103, and large-diameter tools 104 used for various machining processes. The tool magazine device 1 comprises a framework-like frame 3 formed by combining a plurality of vertical members 31 and horizontal members 32, a magazine body 2 comprising a plurality of front and rear racks 4 that are detachably attached to the frame 3 with their longitudinal directions facing up and down and that hold the plurality of tools 102, 103, 104, and a tool magazine 2 provided in front of the frame 3 and attached to the front and rear racks 4 of the magazine body 2 to store the tools used in various machining processes. the horizontal machining center 100; an automatic tool changer 6 for attaching and detaching the tools 102, 103, 104 to and from the spindle 101 of the horizontal machining center 100; a tool standby pot 7 for holding the tools 102, 103, 104 to be attached to the spindle 101 by the automatic tool changer 6 and the tools 102, 103, 104 removed from the spindle 101; an in-magazine tool changer 8 provided in the magazine body 2 for transferring tools to and from the tool standby pot 7; and a tool transport device 9 provided in the magazine body 2 for transferring tools held in the front and rear racks 4 at any position to and from the in-magazine tool changer 8.

[0024] Hereinafter, when it is not necessary to individually refer to the long tool 102, the short tool 103, and the large diameter tool 104, they will be referred to as "tool A" by adding the symbol A thereto.

[0025] The front rack 4 of the magazine body 2 is provided with a plurality of tool holding grippers 41 spaced apart in the longitudinal direction, each of which opens rearward and holds a tool A with its tool axis direction facing left and right, while the rear rack 4 is similarly provided with a plurality of tool holding grippers 41 spaced apart in the longitudinal direction, each of which opens forward and holds a tool A with its tool axis direction facing left and right. The tool holding grippers 41 on the front rack 4 open obliquely upward and rearward, while the tool holding grippers 41 on the rear rack 4 open obliquely upward and frontward (see FIG. 3). A tool phasing key 42 is provided at the deepest portion of the tool holding grippers 41 on both the front and rear racks 4, and the tool phasing key 42 fits into only the deeper and wider tool phasing keyway of two tool phasing keyways of different dimensions formed circumferentially at 180-degree intervals in the shank of a tool holder for, for example, a DIN-, CAT-, or HSK-standard tool (see FIG. 5).

[0026] A wide portion 43 is formed at the opening side of the tool holding grippers 41 of both the front and rear racks 4 by cutting away the upper portion of the tool holding gripper 41. The upper and lower edges of the wide portion 43 of the tool holding grippers 41 of both the front and rear racks 4 are parallel and linearly inclined rearward and upward with respect to the horizontal. The angle of inclination of the opening side portion of the lower edge of the tool holding gripper 41 of the front rack 4 with respect to the horizontal is equal to the angle of inclination of the opening side portion of the lower edge of the tool holding gripper 41 of the rear rack 4 with respect to the horizontal. The shapes of the tool holding grippers 41 of both racks 4 are symmetrical with respect to a vertical line that includes the tool phasing key 42 and is located in the center between both racks 4.

[0027] The distance between two adjacent front racks 4 is adjusted so that some of all the front racks 4 hold long tools 102 and the remaining parts hold short tools 103 and large diameter tools 104, and the distance between two adjacent rear racks 4 is adjusted so that some of all the rear racks 4 hold long tools 102 and the remaining parts hold short tools 103 and large diameter tools 104.

[0028] The tool A is transferred between the tool storage section 5 and the front and rear racks 4 of the magazine body 2, for example, manually by an operator. In this case, the tool phase determination key 42 does not fit into the tool phase determination key grooves of DIN, CAT, and HSK standard tools, which have small depths and widths, so the phase of the tool A relative to the tool holding gripper 41 can always be kept in the correct state.

[0029] 4, the automatic tool changer 6 is provided with tool gripping units 62 at both longitudinal ends for gripping a tool A with the tool axis direction facing the Z-axis direction (left-right direction), which is the axial direction of the spindle 101, and with a tool change arm 61 that is rotatable about an axis that passes through the longitudinal center and extends in the Z-axis direction. Both tool gripping units 62 of the tool change arm 61 are point-symmetrical with respect to the center of rotation when viewed from the Z-axis direction (left or right) (see FIG. 4).

[0030] The tool standby pot 7 is adapted to move in the Z-axis direction relative to the tool change arm 61 of the automatic tool change device 6, and holds the tool A in a position where the tool axis direction faces the Z-axis direction (the same direction as the tool A held by the tool gripping portion 62 of the tool change arm 61). The tool A held in the tool standby pot 7 has a phase that is 180 degrees inverted from the phase of the tool A attached to the spindle 101.

[0031] As shown in detail in Figure 4, the in-magazine tool changer 8 has tool gripping portions 82 at both ends that grip the tool A with the tool axis direction facing the Z-axis direction, and is equipped with a swivel arm 81 that rotates around an axis that passes through the center of the longitudinal direction and extends in the Z-axis direction, so that it can move relative to the tool standby pot 7 in the Z-axis direction.

[0032] 5, the tool transport device 9 includes a movable body 91 that moves in the Z-axis direction and in the longitudinal direction (up and down direction) of the rack 4, a base 92 that is attached to the movable body 91 so as to be rotatable about an axis extending in the Z-axis direction, a transport gripper 93 that is attached to the base 92 so as to be movable within a vertical plane perpendicular to the Z-axis direction and that holds the tool A with its tool axis direction facing the Z-axis direction, and an air cylinder 94 that is attached to the base 92 and serves as an actuator that moves the transport gripper 93 within the vertical plane perpendicular to the Z-axis direction. The phase of the tool A held by the transport gripper 93 is 180 degrees inverted from the phase of the tool A attached to the tool standby pot 7.

[0033] The movable body 91 is attached to a vertical guide rail 33 provided on the frame 3 with its longitudinal direction facing up and down so as to be movable up and down. The upper and lower ends of the vertical guide rail 33 are attached to horizontal guide rails 34 provided on the upper and lower ends of the frame 3 with its longitudinal direction facing left and right so as to be movable left and right. As a result, the movable body 91 is movable up and down and left and right.

[0034] The positional relationship in the front-to-rear direction between the tool transport device 9 and the front and rear racks 4 of the magazine body 2 is such that even when a large-diameter tool 104 is held by the tool holding grippers 41 of the front and rear racks 4 and the transport gripper 93 of the tool transport device 9, there is no interference between the large-diameter tool 104 held by the front and rear racks 4 and the large-diameter tool 104 held by the transport gripper 93 of the tool transport device 9.

[0035] In the above-described tool magazine device 1, a wide variety of tools A stored in the tool storage section 5 are manually held by the tool holding grippers 41 at required positions on both the front and rear racks 4 by an operator. At this time, the tool phase determining key 42 does not fit into the tool phase determining key grooves, which have small depths and widths, of DIN, CAT, and HSK standard tools, so the phase of the tool A relative to the tool holding gripper 41 is in the normal state.

[0036] Next, a method of tool exchange between the spindle 101 of the horizontal machining center 100 and the rack 4 of the magazine body 2 of the tool magazine device 1 will be described.

[0037] During machining by the spindle 101 to which the first tool is attached, both tool gripping portions 62 of the tool change arm 61 of the automatic tool changer 6 are empty and are in a standby position with their longitudinal directions facing up and down. Also, during machining by the spindle 101, the tool standby pot 7 holds a second tool A to be used for the next machining, and the tool transport gripper 93 of the tool transport device 9 holds a third tool A to be used for the next machining after that. Also, both tool gripping portions 82 of the swivel arm 81 of the in-magazine tool changer 8 are empty and are in a standby position with their longitudinal directions facing up and down.

[0038] When machining by the first tool A attached to the spindle 101 is completed, the spindle 101 is moved to the tool change position, and the tool change arm 61 of the automatic tool changer 6 is rotated from the standby position so that the first tool A is grasped by one of the tool gripping portions 62, and the second tool A held in the tool standby pot 7 is grasped by the other tool gripping portion 62.

[0039] Next, the spindle 101 and the tool change arm 61, and the tool change arm 61 and the tool standby pot 7 move relatively in the Z-axis direction, so that the first tool A is withdrawn from the spindle 101 and the second tool A is withdrawn from the tool standby pot 7.

[0040] Next, after the tool change arm 61 is rotated, the spindle 101 and the tool change arm 61, and the tool change arm 61 and the tool standby pot 7 move relatively in the Z-axis direction, whereby the first tool A is held in the tool standby pot 7 and the second tool A is attached to the spindle 101. Since the first tool A is inverted by the tool change arm 61, the phase of the first tool A held in the tool standby pot 7 is inverted by 180 degrees from the phase of the first tool A attached to the spindle 101.

[0041] During machining of the spindle 101 using the second tool A, the swivel arm 81 of the in-magazine tool changer 8 is rotated, and the first tool A held in the tool standby pot 7 is gripped by one of the tool gripping units 82, and the third tool A held by the tool transport gripper 93 is gripped by the other tool gripping unit 82. Next, the swivel arm 81, the tool standby pot 7, and the tool transport device 9 move relatively in the Z-axis direction, whereby the first tool A is withdrawn from the tool standby pot 7 and the third tool A is withdrawn from the transport gripper 93 of the tool transport device 9.

[0042] Next, the swivel arm 81 is rotated to a tool exchange position with the tool standby pot 7 and the transport gripper 93, and then the swivel arm 81, the tool standby pot 7, and the tool transport device 9 move relatively in the Z-axis direction, whereby the first tool A is held by the transport gripper 93 of the tool transport device 9 and the third tool A is held by the tool standby pot 7. Since the swivel arm 81 turns the first tool A 180 degrees, the first tool A held by the transport gripper 93 has the same phase as the first tool A attached to the spindle 101.

[0043] When the first tool A is held by the transport gripper 93 of the tool transport device 9, the movable body 91 moves along the vertical guide rails 33, and the vertical guide rails 33 move along the horizontal guide rails 34, so that the tool transport device 9 moves to a position where the first tool A is to be transferred to the tool gripper 41 of either the front or rear rack 4 where it should be stored (see FIG. 5(a)). Next, the base 92 rotates about the pivot center, so that the deepest and widest tool phasing keyway of the first tool A faces the tool gripper 41 of the rack 4 (see FIG. 5(b)). Next, the air cylinder 94 moves the transport gripper 93 to the far side of the tool gripper 41, so that the V-flange portion of the first tool A is held by the tool gripper 41 (see FIG. 5(c)). As a result, the first tool A is held by the tool gripper 41 in the normal state, and the first tool A is stored in the tool gripper 41 of the rack 4 of the magazine body 2. Thereafter, the air cylinder 94 returns the transport gripper 93 to its original position, and the base 92 is also returned to its original position.

[0044] The tool transport device 9, which has stored the first tool A in the tool holding gripper 41 of the rack 4 of the magazine body 2, moves to a position where it can be transferred to the tool holding gripper 41 of the rack 4 holding the fourth tool A to be used for the next processing, as the movable body 91 moves along the vertical guide rail 33 and the vertical guide rail 33 moves along the horizontal guide rail 34.The fourth tool A is then removed from the tool holding gripper 41 by rotating the base 92 and moving the transport gripper 93 using the air cylinder 94, and the tool transport device 9 then moves to a position where it can be transferred to the tool A exchange device 8 within the magazine.

[0045] By repeating the above-described operations, the horizontal machining center 100 performs machining using the spindle 101 and various tools A.

[0046] In the above-described embodiment, the front and rear racks 4 are arranged spaced apart in the left-right direction with their longitudinal directions facing up and down, and hold the tools so that the tool axis direction faces the Z-axis direction (here, the left-right direction), but this is not limited to this. If the Z-axis direction, which is the axial direction of the spindle, faces up and down, the racks may be arranged spaced apart in the up and down direction with their longitudinal directions facing up and down, and hold the tools so that the tool axis direction faces the Z-axis direction (up and down). [Industrial Applicability]

[0047] The tool magazine device according to the present invention is suitable for use in a machining center. [Explanation of symbols]

[0048] 1: Tool magazine device, 2: Magazine body, 3: Frame, 4: Rack, 41: Tool holding gripper, 42: Tool phase determination key, 7: Tool waiting pot, 8: Tool changer in magazine, 81: Swivel arm, 82: Tool gripper, 9: Tool transport device, 91: Moving body, 92: Base, 93: Tool transport gripper, 94: Air cylinder (actuator), 102: Long tool, 103: Short tool, 104: Large diameter tool, A: Tool

Claims

1. a magazine body comprising a frame, a plurality of front and rear racks detachably attached to the frame with their longitudinal directions facing in the same direction and holding a plurality of tools with their tool axes oriented in the Z-axis direction, which is the direction of the spindle axis; and a tool transport device attached to the magazine body so as to move in the Z-axis direction and in the longitudinal directions of the front and rear racks and for removing tools from and attaching tools to the front and rear racks, wherein the front rack has a plurality of tool holding grippers that open to the rear and hold tools, spaced apart in the longitudinal direction, and the rear rack has a plurality of tool holding grippers that open to the front and hold tools, spaced apart in the longitudinal direction, and the front and rear racks are arranged at intervals in the Z-axis direction; the magazine comprises a tool standby pot that holds tools to be attached to a spindle of a machine tool and tools to be removed from the spindle, with the tool axis direction directed in the Z-axis direction; and an in-magazine tool changer that is provided in the magazine body so as to move relative to the tool standby pot in the Z-axis direction and that transfers tools between the tool standby pot and the tool transport device, the tool transport device comprises: a movable body disposed between the front and rear racks and movable in the Z-axis direction and in the longitudinal direction of the front and rear racks; a base provided on the movable body so as to be rotatable about an axis extending in the Z-axis direction; a transport gripper attached to the base so as to be movably within a plane perpendicular to the Z-axis direction and which holds a tool with its tool axis direction facing the Z-axis direction; and an actuator attached to the base and which moves the transport gripper within the plane to move the transport gripper to a tool attachment / detachment position with respect to the tool holding gripper, The in-magazine tool changer is a tool magazine device in which the in-magazine tool changer is provided with tool gripping portions at both longitudinal ends and is equipped with a swivel arm that is rotatable around an axis that passes through the longitudinal center and extends in the Z-axis direction, the two tool gripping portions of the swivel arm being point-symmetrical with respect to the center of rotation as viewed from the Z-axis direction, and the in-magazine tool changer transfers tools between the tool waiting pot and the transport gripper of the tool transport device so that the state in which the tool is held in the tool waiting pot and the state in which the tool is held in the transport gripper of the tool transport device are in opposite phases.

2. 2. The tool magazine device according to claim 1, wherein a key is provided at the deepest portion of the tool holding gripper of each of the front and rear racks, the key being fitted into only the tool phasing key groove having the greater depth and width of two tool phasing key grooves provided on the tool holder and having different depths and widths.

3. A tool magazine device as described in claim 1 or 2, wherein there are multiple types of racks in both the front and rear racks that hold tools of different lengths and diameters.

Images