Tool Magazine

Abstract

To provide a tool magazine which changes a gripping arm with an attitude opened downward to a closed attitude when moving the same.SOLUTION: A tool magazine comprises a cover, the cover includes a surface member located below a pivot, a notch is formed at a place corresponding to an indexing position in the surface member, and the notch includes a first side extending in a direction orthogonal to the pivot, a second side facing the first side, and a third side which connects one end point of the first side and one end point of the second side. The other end point of the first side and the other end point of the second side are opened, and the first side and the second side are located so that a width in a direction parallel to the third side widens toward a direction opening from the third side.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present technology relates to a tool magazine that guides a gripping arm that grips a tool to an appropriate posture. [Background technology]

[0002] Conventionally, a machine tool includes a spindle head having a spindle, multiple gripping arms for gripping tools, and a tool magazine for transporting the gripping arms (see, for example, Patent Document 1). The tool magazine includes a rail and a movable stage that moves along the rail. The gripping arm includes a support part connected to the movable stage, a pivot provided on the support part, and an arm part rotatably connected to the pivot.

[0003] When the tool is placed at the index position for mounting on the spindle, the spindle moves downward and the tool is mounted on the spindle. At this time, the arm portion of the gripping arm rotates around the pivot and the gripping arm opens downward. When the tool is subsequently removed from the spindle, the gripping arm is usually in a closed state with the tip facing the rail, and after gripping the tool, the gripping arm moves on the rail of the tool magazine while being maintained in the closed state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-176830 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, for example, when replacing a tool manually, the gripping arm may start moving on the rail while in an accidentally open position, which may cause the gripping arm to hit a component of the machine tool and place a large load on the gripping arm and the component of the machine tool.

[0006] The present disclosure has been made in consideration of the above circumstances, and has an object to provide a tool magazine that changes a gripping arm, which is in a downwardly open position, to a closed position when moved. [Means for solving the problem]

[0007] The tool magazine according to the present disclosure includes a spindle, a rail arranged to surround the spindle, a pivot extending in a direction intersecting the spindle, a gripping arm that grips a tool and is rotatable around the axis of the pivot, and a guide member that guides the gripping arm to change its posture from a second posture in which it contacts a specified member to a first posture in which it does not contact a specified member when the gripping arm starts to move on the rail after the tool is positioned at an index position for mounting it on the spindle.

[0008] In the present disclosure, when the gripping arms start to move in the open second position, the guide member can guide and change the gripping arms to the closed first position.

[0009] In the tool magazine according to the present disclosure, the guide member is arranged at a position facing the gripping arm that is arranged at the index position in the second attitude, on the movement direction side of the gripping arm.

[0010] In the present disclosure, when the gripping arm starts to move in the open second position, the guide member can contact the gripping arm, thereby guiding and changing the gripping arm to the closed first position.

[0011] The tool magazine according to the present disclosure includes a cover that covers the rail and includes the specified member and the guide member.

[0012] In the present disclosure, the gripping arm is prevented from contacting any part of the cover other than the guide member, thereby preventing damage to the gripping arm and the cover due to contact between the gripping arm and the cover.

[0013] In the tool magazine of the present disclosure, the cover includes a surface member located below the pivot axis, a notch portion is formed in the surface member at a location corresponding to the index position, and the guide member is provided in the notch portion.

[0014] In the present disclosure, it is possible to prevent the gripping arm from interfering with the cutout portion of the magazine cover.

[0015] In the tool magazine disclosed herein, the cutout portion has a first side extending in a direction perpendicular to the pivot axis, and the guide member is provided on the first side, inclined at an obtuse angle with respect to the surface member, and positioned so as to protrude in a direction away from the pivot axis.

[0016] In the present disclosure, the guide member applies force to the gripping arms so that the gripping arms are in the closed first position, thereby preventing the gripping arms from interfering with the cutout portions of the magazine cover.

[0017] In the tool magazine disclosed herein, the cutout portion comprises a second side opposite to the first side and a third side connecting one end point of the first side and one end point of the second side, and is open between the other end point of the first side and the other end point of the second side, and the guide members are provided on the first side and the second side, respectively, and are arranged so as to be inclined at an obtuse angle relative to the surface member and protrude in a direction away from the pivot axis.

[0018] In the present disclosure, even when the gripping arm moves in two directions, the guide member applies force to the gripping arm so that the gripping arm assumes the closed first position, thereby preventing the gripping arm from interfering with the cutout portion of the magazine cover.

[0019] In the tool magazine according to the present disclosure, the cutout portion has a first side extending in a direction intersecting the pivot axis, and the guide member is provided on the first side and is arranged perpendicular to the surface member.

[0020] In the present disclosure, the guide member applies force to the gripping arms so that the gripping arms are in the closed first position, thereby preventing the gripping arms from interfering with the cutout portions of the magazine cover.

[0021] In the tool magazine of the present disclosure, the cutout portion comprises a second side opposite to the first side and a third side connecting one end point of the first side and one end point of the second side, and is open between the other end point of the first side and the other end point of the second side, the first side and the second side are arranged such that their width in a direction parallel to the third side increases toward a direction opening from the third side, and the guide members are provided on the first side and the second side, respectively, and are arranged perpendicular to the surface member.

[0022] In the present disclosure, even when the gripping arm moves in two directions, the guide member applies force to the gripping arm so that the gripping arm assumes the closed first position, thereby preventing the gripping arm from interfering with the cutout portion of the magazine cover.

[0023] In the tool magazine disclosed herein, the cutout portion has a first side extending in a direction intersecting the pivot axis, and the guide member is provided on the first side, inclined at an obtuse angle with respect to the surface member, and positioned so as to protrude in a direction away from the pivot axis.

[0024] In the present disclosure, the guide member applies force to the gripping arms so that the gripping arms are in the closed first position, thereby preventing the gripping arms from interfering with the cutout portions of the magazine cover.

[0025] In the tool magazine of the present disclosure, the cutout portion comprises a second side opposite to the first side and a third side connecting one end point of the first side and one end point of the second side, and is open between the other end point of the first side and the other end point of the second side, and the first side and the second side are arranged so that their width in a direction parallel to the third side increases toward a direction opening from the third side, and the guide members are provided on the first side and the second side, respectively, and are arranged so as to be inclined at an obtuse angle with respect to the surface member and protrude in a direction away from the pivot axis.

[0026] In the present disclosure, even when the gripping arm moves in two directions, the guide member applies force to the gripping arm so that the gripping arm assumes the closed first position, thereby preventing the gripping arm from interfering with the cutout portion of the magazine cover.

[0027] The tool magazine according to the present disclosure includes a guide auxiliary member provided on the gripping arm and contacting the guide member to change the posture of the gripping arm.

[0028] In the present disclosure, since the gripping arm does not directly contact the guide member, the load on the gripping arm can be reduced.

[0029] In the tool magazine according to the present disclosure, the guide member is provided on the gripping arm.

[0030] In the present disclosure, when the gripping arms start to move in an open position, the guide member can guide the gripping arms to the closed first position and hold them there. Effect of the Invention

[0031] In a tool magazine according to one embodiment of the present disclosure, when the gripping arm starts to move in an open position, the guide member can guide the gripping arm to a closed position, thereby changing the position. [Brief description of the drawings]

[0032] [Figure 1] 1 is a perspective view of a machine tool according to an embodiment of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. 2 is a perspective view of the machine tool with the magazine cover omitted. [Figure 4] FIG. 2 is a perspective view of the machine tool from which the tool changer, magazine cover, etc. are omitted. [Diagram 5] FIG. 2 is a perspective view showing a simplified view of a moving table and a gripping arm. [Figure 6] FIG. 4 is a perspective view illustrating a rail portion. [Figure 7] FIG. 2 is a front view of a spindle head, a tool changer, and a magazine cover according to the first embodiment. [Figure 8] FIG. 4 is a partial cross-sectional view illustrating the spindle head when a tool is attached. [Figure 9] FIG. 4 is a partial cross-sectional view illustrating the spindle head after a tool is attached thereto. [Figure 10] 1 is a perspective view illustrating a gripping arm, a magazine cover, and the like in an abnormal posture according to the first embodiment. FIG. [Figure 11] 1 is a rear view showing the gripping arm, the magazine cover, and the like when in contact according to the first embodiment; FIG. [Figure 12] FIG. 11 is a front view of a spindle head, a tool changer, and a magazine cover according to a second embodiment. [Figure 13] 13 is a perspective view showing the gripping arm, the magazine cover, and the like in an abnormal posture according to the second embodiment. FIG. [Figure 14] FIG. 11 is a rear view illustrating the gripping arm and the magazine cover when they come into contact with each other according to the second embodiment. [Figure 15] FIG. 11 is a front view of a spindle head, a tool changer, and a magazine cover according to a third embodiment. [Figure 16] FIG. 11 is a perspective view illustrating a gripping arm, a magazine cover, and the like in an abnormal posture according to a third embodiment. [Figure 17] FIG. 11 is a rear view illustrating the gripping arm and the magazine cover when in contact according to the third embodiment. [Figure 18]FIG. 13 is a perspective view illustrating a gripping arm, a magazine cover, and the like in an abnormal posture according to a fourth embodiment. [Figure 19] FIG. 13 is a rear view illustrating the gripping arm and the magazine cover when in contact according to the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] (Embodiment 1) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing a tool magazine according to an embodiment of the present invention. In the following description, arrows in the drawings will be used to indicate up / down, left / right, and front / rear directions. FIG. 1 is a perspective view of a machine tool according to an embodiment of the present invention, FIG. 2 is a front view of the machine tool, FIG. 3 is a perspective view of the machine tool with the magazine cover omitted, FIG. 4 is a perspective view of the machine tool with the tool changer, magazine cover, etc. omitted, FIG. 5 is a perspective view showing a simplified representation of a movable table and a gripping arm, FIG. 6 is a perspective view showing a simplified representation of a rail portion, and FIG. 7 is a front view of a spindle head, tool changer, and magazine cover according to embodiment 1.

[0034] The machine tool 100 includes a base 20, a Y-direction moving device 22, an X-direction moving device 26, a column 28, a Z-direction moving device 30, a spindle head 32, a tool changer 10, etc. The base 20 is placed on a floor surface. The base 20 supports the column 28 via the Y-direction moving device 22 and the X-direction moving device 26 so that the column 28 can move in the X direction (left-right direction) and the Y direction (front-back direction). The base 20 also supports a workpiece holding device 120 that holds a workpiece to be machined by driving it about two axes.

[0035] The Y-direction moving device 22 includes a pair of parallel guide rails 22a, a plurality of blocks 22b, a Y-direction moving stage 22c, and a Y-direction drive motor (not shown). The guide rails 22a are provided on the upper surface of the base 20, extending in the front-rear direction with an appropriate interval therebetween. The blocks 22b are fitted into the guide rails 22a so as to be movable in the front-rear direction. The Y-direction moving stage 22c is fixed on the blocks 22b. The Y-direction moving stage 22c moves in the front-rear direction when driven by the Y-direction drive motor.

[0036] The X-direction moving device 26 includes a pair of parallel guide rails 26a, a plurality of blocks 26b, a column base 26c, and an X-axis direction drive motor (not shown). The guide rails 26a are provided on the upper surface of the Y-direction moving base 22c, extending in the left-right direction with an appropriate gap therebetween. The blocks 26b are fitted to the guide rails 26a so as to be movable in the left-right direction. The column base 26c is fixed on the blocks 26b. The column base 26c is moved in the left-right direction by the drive of the X-direction drive motor. The column 28 is pillar-shaped and fixed on a column base 26c. The column 28 is moved in the front-rear direction and the left-right direction by the Y-direction moving device 22 and the X-direction moving device 26.

[0037] The Z-direction movement device 30 comprises a pair of parallel guide rails 30a, 30a, a number of blocks 30b, 30b, ..., a spindle head table 30c, and a Z-direction drive motor (not shown). The guide rails 30a, 30a are vertically extended in front of the column 28 with an appropriate interval between them in the left-right direction. The blocks 30b, 30b, ... are fitted into the guide rails 30a, 30a so as to be vertically movable. The spindle head table 30c is fixed to the front side of the blocks 30b, 30b, .... The spindle head table 30c moves vertically by being driven by the Z-direction drive motor.

[0038] The spindle head 32 is fixed to a spindle head table 30c. By controlling the drive of the X-direction drive motor, the Y-direction drive motor, and the Z-direction drive motor, the spindle head 32 moves forward and backward, left and right, and up and down. The spindle head 32 can move between a processing position where a workpiece is processed and a tool exchange position where a tool is exchanged.

[0039] The tool exchange device 10 includes a tool magazine 40. The tool exchange device 10 transports a plurality of cylindrical tool holders 11, and attaches and detaches the tool holders 11 to and from the lower end of a spindle 34 (see FIG. 8) protruding from the bottom of a spindle head 32. The tool holders 11 hold tools. The tool magazine 40 includes a rail portion 41 and a chain portion 42. As shown in FIG. 7, the rail portion 41 includes support beams 41a, 41a, a rail base 41b and a rail 41c, which will be described later. The chain portion 42 includes a plurality of movable carriages 43, 43,..., a plurality of link members 44, 44,..., and a plurality of gripping arms 70, 70,.... The plurality of (for example, 11) movable carriages 43, 43,... are each supported by a rail 41c and are movable on a track defined by the rail 41c. The link members 44, 44,... connect the adjacent movable tables 43, 43. The multiple movable tables 43, 43,... and the link members 44, 44,... form an endless chain. The multiple (e.g., 22) gripping arms 70, 70,... are connected to the lower parts of the movable tables 43, 43,... and grip the tool holders 11. The tool magazine 40 circulates the movable tables 43, 43,... along the track of the rail 41c, and indexes the tool holder 11 held by the gripping arm 70 to an exchange position below the spindle 34. The position of the gripping arm 70 at this time is the indexing position. As shown in FIG. 5, the gripping arm 70 connected to the lower part of the movable table 43 includes an arm pivot 77 and a first cam follower 71 and a second cam follower 72 that abut against the cam mechanism 60 described later. The gripping arm 70 is connected to the movable table 43 so that the arm pivot 77 is aligned along the track tangent of the rail 41c, and the first cam follower 71 is arranged above the arm pivot 77, and the second cam follower 72 is arranged below the arm pivot 77. The rail base 41b is disposed at an incline such that the rear end is higher by approximately 30 degrees from the horizontal plane.

[0040] The tool magazine 40 is covered by a magazine cover 90 . The magazine cover 90 comprises an upper plate portion 91 covering the top of the tool magazine 40, an outer plate portion 92 covering the upper outer periphery side, a lower plate portion 93 covering the lower outer periphery side, and an inner plate portion 94 covering the inner periphery side. The upper plate portion 91 has a generally elliptical ring shape having a predetermined width as a whole, and both ends in the front-rear direction are trapezoidal. An outer plate portion 92 is connected to the outer edge of the upper plate portion 91 so as to extend obliquely outward from the outer edge. A window portion 98 is provided in the center of the front side of the outer plate portion 92. Fig. 2A is an enlarged view of the area within the dashed circle in Fig. 2. As shown in Fig. 2A, a lower plate portion 93 is connected to the lower edge of the outer plate portion 92 so as to be folded back inward from the lower edge. A guide member 99 is connected to the lower plate portion 93. The guide member 99 will be described in detail later. The predetermined member that the gripping arm 70 comes into contact with corresponds to, for example, the lower plate portion 93 or another member of the machine tool 100.

[0041] As shown in FIG. 7, a cutout portion 97 is formed in the front portion of the lower plate portion 93. The cutout portion 97 includes a first side 971 extending in a direction intersecting the arm pivot 77 of the gripping arm 70 at the indexing position, a second side 972 facing the first side 971, and a third side 973 connecting an upper end point of the first side 971 and an upper end point of the second side 972. An open portion 974 is formed by opening between a lower end point of the first side 971 and a lower end point of the second side 972. The first side 971 and the second side 972 are arranged so that the left-right width increases from the third side 973 toward the open portion 974. The magazine cover 90 also includes a guide member 99 in the form of a substantially triangular plate. The guide member 99 is inclined at an obtuse angle with respect to the lower plate portion 93 of the magazine cover 90, and is disposed so as to protrude downward and forward, with one side of the guide member 99 contacting each of a first side 971 and a second side 972 of the cutout portion 97. That is, θ in Fig. 7 is an obtuse angle. Note that the shape of the guide member 99 is not limited to a substantially triangular shape, and may be, for example, a substantially rectangular shape or a substantially semicircular shape.

[0042] FIG. 8 is a partial cross-sectional view showing the spindle head 32 when a tool is attached. As shown in FIG. 8, the spindle head 32 rotatably holds the spindle 34 extending vertically inside the front side. The spindle 34 detachably holds the tool holder 11 at its lower end. The spindle 34 has a hollow cylindrical shape, and a tapered hole 34a whose inner diameter increases downward is formed at its lower end. The tool holder 11 is attached to the spindle 34 by fitting the tapered mounting portion 12 formed at the upper part into the tapered hole 34a. At this time, the grip arm 70 is in the first position. Even if the grip arm 70 moves on the rail 41c in the first position, it does not come into contact with the magazine cover 90.

[0043] Fig. 9 is a partial cross-sectional view showing the spindle head 32 after a tool is attached. After the tool holder 11 is attached to the spindle 34 as shown in Fig. 8, the spindle head 32 descends. At this time, the cam mechanism 60 presses down the second cam follower 72, a mechanism (not shown) that holds the grip arm 70 in the first position releases its hold, and the grip arm 70 swings clockwise around the arm pivot 77 as viewed from the right side. At this time, the grip arm 70 assumes a second position as shown in Fig. 9. When the grip arm 70 moves on the rail 41c in the second position, it comes into contact with the magazine cover 90.

[0044] After machining of the workpiece is completed, the spindle head 32 rises. At this time, the cam mechanism 60 pushes up the first cam follower 71, the mechanism (not shown) that holds the gripping arm 70 in the second position releases its hold, and the gripping arm 70 swings counterclockwise around the arm pivot 77 as viewed from the right side, assuming the first position and gripping the tool holder 11 as shown in FIG. 8. The spindle head 32 rises further, and the tool holder 11 is released from the spindle 34.

[0045] Fig. 10 is a perspective view showing the gripping arm 70 and the magazine cover when in an abnormal position according to the first embodiment. Normally, the gripping arm 70 grips the tool holder 11 in the first position, but when, for example, an operator replaces the tool holder 11 by putting the gripping arm 70 in the second position and then forgets to return the gripping arm 70 to the first position, or fails to recognize that the gripping arm 70 is not held in the first position, the gripping arm 70 will be in a state gripping the tool holder 11 in the second position as shown in Fig. 10. The position of the gripping arm 70 in this state is an abnormal position.

[0046] When grip arm 70 is in an abnormal posture, if grip arm 70 is moved along rail 41c, grip arm 70 comes into contact with guide member 99. If grip arm 70 continues to move on rail 41c after grip arm 70 comes into contact with guide member 99, a rearward and upward force is applied to grip arm 70 from guide member 99, and guide member 99 swings grip arm 70 about arm pivot 77 as an axis, and guide member 99 guides grip arm 70 to the first posture.

[0047] In the tool magazine according to the first embodiment, the gripping arm 70 that starts moving on the rail 41c while remaining in the abnormal posture is guided to the first posture by the guide member 99.

[0048] (Embodiment 2) The following describes the second embodiment, focusing on the differences from the first embodiment. Configurations common to the first embodiment are given the same reference numerals as the first embodiment, and descriptions thereof will be omitted. FIG. 12 is a front view of the spindle head, the tool changer, and the magazine cover according to the second embodiment, and FIG. 13 is a perspective view showing the gripping arm, the magazine cover, and the like when the gripping arm is in an abnormal position according to the second embodiment. The cutout portion 97 formed in the magazine cover 90 according to the second embodiment is formed in the front part of the lower plate portion 93, and includes a first side 971 extending in a direction perpendicular to the arm pivot 77 of the gripping arm 70 at the indexing position, a second side 972 substantially parallel to the first side 971, and a third side 973 connecting the upper end point of the first side 971 and the upper end point of the second side 972. In the second embodiment, the left-right width between the first side 971 and the second side 972 is constant from the upper side to the lower side of the cutout portion 97. In addition, the guide member 99 is inclined at an obtuse angle with respect to the lower plate portion 93 of the magazine cover 90, and is disposed so as to protrude downward and forward. That is, θ in FIG. 12 is an obtuse angle.

[0049] 14 is a rear view that shows the gripping arm and the magazine cover when they come into contact according to embodiment 2. When gripping arm 70 is in an abnormal position as in embodiment 1, gripping arm 70 comes into contact with guide member 99 when gripping arm 70 is moved along rail 41c. After the gripping arm 70 comes into contact with the guide member 99, when the gripping arm 70 continues to move on the rail 41c, an upward force is applied from the guide member 99 to the gripping arm 70, which causes the guide member 99 to swing the gripping arm 70 around the arm pivot 77, and the guide member 99 guides the gripping arm 70 to assume the first position.

[0050] (Embodiment 3) The following describes the third embodiment, focusing on differences from the first embodiment. Configurations common to the first embodiment are given the same reference numerals as the first embodiment, and descriptions thereof will be omitted. As shown in Figures 15 and 16, the cutout portion 97 formed in the magazine cover 90 of the third embodiment is formed in the front portion of the lower plate portion 93 and includes a first side 971 extending in a direction intersecting the arm pivot 77 of the arm at the indexing position, a second side 972 facing the first side 971, and a third side 973 connecting the upper end point of the first side 971 and the upper end point of the second side 972. An open portion 974 is formed between the lower end point of the first side 971 and the lower end point of the second side 972 by opening the space between them, and the first side 971 and the second side 972 are arranged so that the left and right width increases from the third side 973 toward the open portion. In addition, the guide member 99 is arranged to protrude downward and forward, approximately perpendicular to the lower plate portion 93 of the magazine cover 90. That is, θ in Figure 15 is approximately a right angle.

[0051] 17 is a rear view showing the gripping arm and the magazine cover when they come into contact with each other according to embodiment 3. When the gripping arm 70 is in an abnormal position as in embodiment 1, the gripping arm 70 comes into contact with the guide member 99 when the gripping arm 70 is moved along the rail 41c. After the gripping arm 70 comes into contact with the guide member 99, when the gripping arm 70 continues to move on the rail 41c, a rearward force is applied to the gripping arm 70 from the guide member 99, and the guide member 99 swings the gripping arm 70 around the arm pivot 77, guiding it to the first position.

[0052] (Embodiment 4) The following describes the differences between embodiment 4 and embodiment 1. Configurations common to embodiment 1 are given the same reference numerals as in embodiment 1, and descriptions thereof will be omitted. 18, the cutout portion 97 and the guide member 99 are the same as those in the first embodiment. In the fourth embodiment, the gripping arm 70 is provided with a guide assistant member 70a. The guide assistant member 70a has a curved plate-like edge and is disposed so as to extend from the gripping arm 70 in all directions. When the gripping arm 70 is in an abnormal posture as shown in Fig. 18, if the gripping arm 70 is moved along the rail 41c, the guide auxiliary member 70a of the gripping arm 70 comes into contact with the guide member 99 as shown in Fig. 19. If the gripping arm 70 continues to move on the rail 41c after the guide auxiliary member 70a of the gripping arm 70 comes into contact with the guide member 99, a rear-upward force is applied from the guide member 99 to the guide auxiliary member 70a of the gripping arm 70, and the guide member 99 guides the gripping arm 70 to the first posture.

[0053] The guide auxiliary member 70a is made of, for example, resin. By making the guide auxiliary member 70a out of resin, when the guide auxiliary member 70a comes into contact with the guide member 99, the guide auxiliary member 70a can move more smoothly over the guide member 99, and the load on the magazine cover 90 and the grip arm 70 can be reduced, compared to when the guide auxiliary member 70a is made of another material, for example, metal. (Modification)

[0054] In the first embodiment, the magazine cover 90 includes the guide member, but the magazine cover 90 may not include the guide member, and the grip arm 70 may include the guide member instead. The guide member according to the modified example may be the same as the guide auxiliary member 70a. In this case, the magazine cover 90 has a cutout portion 97 formed such that the lower side is open and the left-right width increases from the third side 973 toward the open portion 974, as in the first embodiment, and the guide member is disposed so that when the grip arm 70 is moved along the rail 41c when the grip arm 70 is in an abnormal posture, the grip arm 70 contacts the first side 971 or the second side 972 of the guide member.

[0055] The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of the claims and the scope equivalent to the claims. [Explanation of symbols]

[0056] 100 Machine tools 11 Tool holder (tool) 32 Spindle head (machining spindle section) 40 Tool Magazine 41c rail 70 Grasping Arm 70a Guidance auxiliary parts 77 Arm pivot 90 Magazine Cover 97 Cutout 971 First Side 972 Second Side 973 Third Side 974 Open area 99 Guiding elements

Claims

1. The main axis and A rail disposed so as to surround the spindle; A pivot axis extending in a direction intersecting the main axis; a gripping arm that grips a tool and is rotatable around the axis of the pivot; a guide member that guides the gripping arm to change its posture from a second posture in which the gripping arm contacts a predetermined member to a first posture in which the gripping arm does not contact a predetermined member when the gripping arm starts moving on the rail after the tool is placed at an index position for mounting on the spindle; a cover that covers the rail and includes the predetermined member and the guide member; A tool magazine equipped with

2. The guide member is disposed at a position facing the gripping arm that is disposed at the index position in the second attitude on the movement direction side of the gripping arm.

2. The tool magazine according to claim 1.

3. the cover includes a surface member located below the pivot; A cutout portion is formed in the plane member at a location corresponding to the index position, and the guide member is provided in the cutout portion.

3. A tool magazine according to claim 1 or 2.

4. The cutout portion has a first side extending in a direction perpendicular to the pivot axis, The guide member is provided on the first side, is inclined at an obtuse angle with respect to the plane member, and is disposed so as to protrude in a direction away from the pivot axis.

4. The tool magazine according to claim 3.

5. The cutout portion is A second side opposite to the first side; a third side connecting one end point of the first side and one end point of the second side; Equipped with There is an open space between the other end point of the first side and the other end point of the second side, The guide members are provided on the first side and the second side, inclined at an obtuse angle with respect to the plane member, and disposed so as to protrude in a direction away from the pivot axis.

5. The tool magazine according to claim 4.

6. The cutout portion has a first side extending in a direction intersecting the pivot axis, The guide member is provided on the first side and is disposed perpendicular to the plane member.

4. The tool magazine according to claim 3.

7. The cutout portion is A second side opposite to the first side; a third side connecting one end point of the first side and one end point of the second side; Equipped with There is an open space between the other end point of the first side and the other end point of the second side, the first side and the second side are arranged such that a width of the first side and the second side in a direction parallel to the third side increases toward a direction open from the third side, The guide members are provided on the first side and the second side, respectively, and are disposed perpendicular to the plane member.

7. The tool magazine according to claim 6.

8. The cutout portion has a first side extending in a direction intersecting the pivot axis, The guide member is provided on the first side, is inclined at an obtuse angle with respect to the plane member, and is disposed so as to protrude in a direction away from the pivot axis.

4. The tool magazine according to claim 3.

9. The cutout portion is A second side opposite to the first side; a third side connecting one end point of the first side and one end point of the second side; Equipped with There is an open space between the other end point of the first side and the other end point of the second side, the first side and the second side are arranged such that a width of the first side and the second side in a direction parallel to the third side increases toward a direction open from the third side, The guide members are provided on the first side and the second side, inclined at an obtuse angle with respect to the plane member, and disposed so as to protrude in a direction away from the pivot axis.

9. The tool magazine according to claim 8.

10. A guide assist member is provided on the gripping arm and contacts the guide member to change the position of the gripping arm. A tool magazine according to any one of claims 1 to 9.

11. The guide member is provided on the gripping arm.

2. The tool magazine according to claim 1.

Images