JP6476537B2 - Machine tools and tool holders - Google Patents

Description

  The present invention relates to a machine tool that selectively attaches and detaches a tool held by a tool holder to a rotating spindle and executes machining with each tool, and a tool holder used in the machine tool.

  The machine tool is supported by a spindle head so as to be rotatable about the axis, and stores a spindle on which a tool is mounted, a support portion that supports a workpiece and can be rotated about a vertical axis, and a tool to be mounted on the spindle. Tool magazine. The tool is mounted on the spindle via a tool holder.

  Tools are broadly classified into rotating tools that rotate on the main shaft and turning tools that are fixed on the main shaft. When the rotary tool is mounted on the spindle, the workpiece is fixed by the support portion without being rotated about the vertical axis, and is cut by the rotation of the spindle.

  A rotation stop plate is provided on the outer periphery of the tool holder of the turning tool so as to project outward in the radial direction. An engagement hole is formed in the rotation stopper plate. The main shaft head is provided with an engaging projection that can be engaged with the engaging hole. When the turning tool is mounted on the main shaft, the engaging protrusion is locked in the engaging hole. The turning tool is fixed to the spindle head, and the workpiece rotates around the vertical axis at the support portion, and is turned by the rotation of the support portion (see, for example, Patent Document 1).

  Patent Document 2 describes an annular tool magazine provided around a main shaft. The tool magazine includes a plurality of grip arms (holding arms). The holding arm holds the tool via the tool holder and moves around the spindle. When exchanging the tool, the predetermined holding arm moves to a tool exchanging position located below the main shaft.

  At the initial setting of the tool magazine, the operator attaches a rotary tool or a turning tool to the holding arm. When attaching the turning tool to the holding arm, the operator attaches the turning tool to the holding arm in a locking posture in which the engaging protrusion can be locked in the engaging hole.

JP2012-213826A JP 2012-210680 A

  However, even if the turning tool has a different posture from the locking posture, the operator can attach the turning tool to the holding arm. Therefore, when the operator mistakenly attaches the turning tool to the holding arm in a posture different from the locking posture, the engaging protrusion does not lock into the engaging hole, and the turning tool cannot be fixed to the spindle head.

  The present invention has been made in view of such circumstances, and includes a machine tool that can prevent a turning tool from being attached to a holding arm in a posture different from a locking posture, and a tool holder used in the machine tool. The purpose is to provide.

A machine tool according to the present invention is supported by a spindle head and rotates around an axis, and a spindle on which a turning tool is attached / detached via a tool holder, the tool holder is held, and the axis provided in the middle can be rotated A plurality of holding portions, and a rotation stop plate projecting radially outward on the outer periphery of the tool holder holding the turning tool and locking to the spindle head, and the rotation stop plate is locked to the spindle head In a machine tool in which the tool holder is to be held by the holding portion in a possible locking posture, when the tool holder is held by the holding portion in a posture different from the locking posture, the holding portion and turning The interference part with which a tool interferes is provided in the said rotation stop plate or the holding part, It is characterized by the above-mentioned.
In the machine tool according to the present invention, the holding portion includes an arm and a cover provided on the arm. When the interference portion is provided on the holding portion, the interference portion is provided on the cover. When the tool holder is held by the holding portion in a posture different from the locking posture, the interference portion provided on the cover abuts on the anti-rotation plate or the interference provided on the anti-rotation plate The portion is in contact with the cover.

  The machine tool according to the present invention is characterized in that the interference portion is a convex portion protruding in the thickness direction of the rotation stopper plate.

  The machine tool according to the present invention is characterized in that the interference portion is provided on one surface of the detent plate.

  In the machine tool according to the present invention, the holding part has an arm shape with one end parted into two branches, and the interference part comes into contact with an inner peripheral surface of the one end part divided into two parts. Features.

  In the machine tool according to the present invention, the interference portion is provided in a portion of the holding portion where the turning tool is held, and the interference portion is in contact with a circumferential surface of the rotation stop plate. And

  The tool holder according to the present invention is a tool holder that holds a turning tool and is used to mount the turning tool on a spindle of any of the machine tools described above, wherein the tool holder that holds the turning tool is locked. When the holding portion is held in a posture different from the posture, an interference portion that interferes with the holding portion and the turning tool is provided on the detent plate.

  In the present invention, when the operator attaches the tool holder holding the turning tool to the holding arm in a posture different from the locking posture, the interference holder prevents the tool holder from being attached to the holding arm.

  In the present invention, the operator moves the tool holder in a direction parallel to the rotation stopper plate and attaches the turning tool to the holding arm. When the operator attaches the tool holder to the holding arm in a posture different from the locking posture, the convex portion comes into contact with the holding arm or the rotation stopper plate, and the attachment of the tool holder to the holding arm is prevented.

  In the present invention, the operator moves the tool holder in a direction parallel to the rotation stopper plate and attaches the turning tool to the holding arm. When the operator attaches the tool holder to the holding arm in a posture different from the locking posture, the interference portion comes into contact with the holding arm, and the attachment of the tool holder to the holding arm is prevented.

  In the present invention, when the operator attaches the tool holder to the holding arm in a posture different from the locking posture, the interference portion abuts on the inner peripheral surface of the holding arm, thereby preventing the tool holder from being attached to the holding arm. Is done.

  In the present invention, when the operator attaches the tool holder to the holding arm in a posture different from the locking posture, the interference portion provided in the holding arm abuts on the circumferential surface of the rotation stop plate, and the tool to the holding arm Mounting of the holder is prevented.

  In the machine tool and the tool holder according to the present invention, when the tool holder for holding the turning tool is attached to the holding arm in a posture different from the locking posture, the tool holder to the holding arm by the interference portion. Is blocked. The operator notices that he is trying to attach the turning tool to the holding arm in an incorrect posture, and can change the posture of the turning tool to the locking posture and attach the turning tool to the holding arm.

1 is a perspective view of a machine tool according to Embodiment 1. FIG. It is a front view of a machine tool. It is a right view of a machine tool. It is the perspective view which abbreviate | omitted the cover etc. which cover a tool change apparatus and a guide rail. It is a fragmentary sectional view which shows a spindle head schematically. It is a perspective view which shows a rail part schematically. It is a perspective view which briefly shows the tool magazine which moves a rail part. It is a perspective view which outlines a moving stand. It is sectional drawing which shows schematically the mobile stand attached to the rail. It is a perspective view which briefly shows the holding arm seen from the lower part. FIG. 5 is a perspective view schematically showing a cam mechanism and a holding arm. FIG. 6 is a right side view schematically showing a cam mechanism and a holding arm when the spindle head is raised. FIG. 6 is a right side view schematically showing a cam mechanism and a holding arm when the spindle head is lowered. It is the perspective view seen from the upper side which shows the tool holder which mounted | wore the turning tool schematically. It is the perspective view seen from the lower side which briefly shows the tool holder with which the main axis | shaft was mounted | worn. FIG. 5 is a perspective view schematically showing the tool holder when the rotation stopper plate is in a locking posture capable of being locked to the spindle head. FIG. 10 is a side view schematically showing the tool holder when the rotation stopper plate is in a posture opposite to the locking posture. FIG. 6 is a partial side cross-sectional view schematically showing the tool holder when the rotation stopper plate is in a posture opposite to the locking posture. FIG. 10 is a perspective view schematically showing a holding arm of a machine tool as viewed from below according to a second embodiment. FIG. 10 is a perspective view schematically showing the tool holder when the rotation stopper plate is in a posture opposite to the locking posture. FIG. 10 is a perspective view schematically showing a holding arm of a machine tool as viewed from below according to a third embodiment. FIG. 10 is a perspective view schematically showing the tool holder when the rotation stopper plate is in a posture opposite to the locking posture.

(Embodiment 1)
Hereinafter, the present invention will be described with reference to the drawings showing a machine tool according to a first embodiment. In the following description, up and down, left and right, and front and rear indicated by arrows in the figure are used. The operator operates the machine tool in front and attaches / detaches the workpiece. 1 is a perspective view of a machine tool, FIG. 2 is a front view of the machine tool, FIG. 3 is a right side view of the machine tool, and FIG. 4 is a perspective view in which a tool changer and a cover that covers a guide rail are omitted. It is.

  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 (processing unit), a tool changer 10 (conveying unit), and the like. The base 20 is disposed on the floor surface. The base 20 supports the column 28 movably in the X direction (left-right direction) and the Y direction (front-rear direction) via the Y-direction moving device 22 and the X-direction moving device 26. The base 20 supports a workpiece holding device 120 that drives and holds a workpiece to be processed around two axes. The column 28 supports the spindle head 32 through the Z-direction moving device 30 so as to be movable in the Z direction (vertical direction). The tool changer 10 changes a tool attached to the spindle head 32.

  The Y-direction moving device 22 includes a pair of guide rails 22a parallel to each other, a plurality of blocks 22b, a Y-direction moving base 22c, and a Y-direction drive motor (not shown). The guide rail 22a extends in the front-rear direction on the upper surface of the base 20 with an appropriate interval in the left-right direction. Each block 22b is fitted to each guide rail 22a so as to be movable in the front-rear direction. The Y-direction moving table 22c is fixed on each block 22b. The Y-direction moving base 22c moves in the front-rear direction by driving the Y-direction drive motor.

The X-direction moving device 26 includes a pair of guide rails 26a parallel to each other, a plurality of blocks 26b, a column base 26c, and an X-direction drive motor (not shown). The guide rail 26a extends in the left-right direction on the upper surface of the Y-direction moving table 22c with an appropriate interval in the front-rear direction. Each block 26b is fitted to each guide rail 26a so as to be movable in the left-right direction. The column base 26c is fixed on each block 26b. The column 28 is fixed on the column base 26c. The column 28 moves in the left-right direction by driving the X-direction drive motor.
The column 28 is moved in the Y direction and the X direction by the Y direction moving device 22 and the X direction moving device 26.

  The Z-direction moving device 30 includes a pair of guide rails 30a parallel to each other, a plurality of blocks 30b, a spindle head base 30c, and a Z-direction drive motor (not shown). The guide rail 30a extends in the vertical direction on the front surface of the column 28 with an appropriate interval in the horizontal direction. Each block 30b is fitted to each guide rail 30a so as to be movable in the vertical direction. The spindle head base 30c is fixed to the front surface of each block 30b. The spindle head base 30c moves in the vertical direction by driving the Z-direction drive motor.

  The spindle head 32 is fixed to the spindle head base 30c. By driving and controlling the X direction drive motor, the Y direction drive motor, and the Z direction drive motor, the spindle head 32 moves back and forth, left and right, and up and down.

FIG. 5 is a partial sectional view schematically showing the spindle head 32.
As shown in FIG. 5, the spindle head 32 rotatably holds a spindle 34 extending in the Z direction inside the front side. The main shaft 34 detachably holds a cylindrical tool holder 11 having a tool attached to the lower end. The main shaft 34 has a hollow cylindrical shape, and a tapered hole 34a having an inner diameter that increases downward is formed at the lower end portion. The taper mounting portion 12 formed on the upper portion of the tool holder 11 is mounted by being fitted into the taper hole 34a.

  In the main shaft 34, a draw bar (not shown) is inserted above the tapered hole 34 a so as to be movable in the axial direction of the main shaft 34. The draw bar is provided with a clamp spring (not shown) around it. The draw bar is urged upward by the elastic force of the clamp spring. A collet chuck (not shown) is provided at the lower end of the draw bar. When the tapered mounting portion 12 is mounted in the tapered hole 34a of the main shaft 34, the collet chuck can hold the pull stud 12a protruding upward from the tapered mounting portion 12. The collet chuck holds the pull stud 12a while being urged upward by the draw bar by the elastic force of the clamp spring.

  A pressing mechanism (not shown) that presses the draw bar downward is provided above the draw bar. The pressing mechanism presses the draw bar downward against the elastic force of the clamp spring. By pushing down the draw bar, the collet chuck releases the pull stud 12a. The tool holder 11 is disengaged from the main shaft 34 when the collet chuck releases the pull stud 12a.

  The main shaft 34 is connected to a main shaft motor 35 provided at the upper end of the main shaft head 32. The main shaft 34 rotates around the shaft center by driving the main shaft motor 35. The main shaft 34 can rotate about the workpiece fixed to the workpiece holding device 120 by rotating around the axis while the tool holder 11 is attached to the lower end.

FIG. 6 is a perspective view schematically illustrating the rail portion, and FIG. 7 is a perspective view schematically illustrating a tool magazine that moves the rail portion.
The tool changer 10 includes a tool magazine 40 and a magazine drive unit 50. The tool changer 10 conveys a plurality of tool holders 11 and attaches / detaches the tool holder 11 to / from the lower end portion of the main shaft 34. The tool magazine 40 includes a rail part 41 and a chain part 42. The rail portion 41 includes a pair of support beams 41a, a rail base 41b, and a rail 41c. Each support beam 41a is a plate-like structural member having a triangular shape inclined downward with the upper side as a hypotenuse, and is fixed to the left and right of the column 28 in a cantilevered manner. Each support beam 41a extends from the portion fixed to the left and right of the column 28 to be inclined downward to the front from the both side portions of the spindle head 32.

  The rail base 41b is an oval annular member, and is fixed to each support beam 41a so as to surround the column 28 and the spindle head 32. The rail base 41b extends from the front side lower side to the rear side upper side along the upper end face of each support beam 41a, and is arranged so as to be inclined approximately 30 degrees from the horizontal plane (see FIG. 3). As shown in FIG. 6, a plate-like mounting base 41e extends from the semicircular periphery at the rear semicircular portion of the rail base 41b. The mounting base 41 e supports the magazine driving unit 50.

  FIG. 8 is a perspective view schematically showing the moving table, FIG. 9 is a sectional view schematically showing the moving table attached to the rail, and FIG. 10 is a perspective view schematically showing the holding arm 70 as viewed from below. The rail 41c has a substantially rectangular cross section and is formed on the rail base 41b so as to form an oval and endless track. As shown in FIG. 9, the rail 41c has a hook-shaped fitting portion 41d having an oval shape on the inner peripheral side surface and the outer peripheral side surface of the oval track. The fitting portion 41d is fitted into V grooves of an inner roller 47 and an outer roller 48 described later. The chain part 42 includes a plurality of moving platforms 43, a plurality of link members 44, and a plurality of holding arms 70. A plurality of (for example, 11) moving platforms 43 are each supported by a rail 41c, and are movable on a track by the rail 41c. The link member 44 connects the adjacent moving platforms 43. The plurality of moving platforms 43 and the link member 44 form an endless chain. A plurality of (for example, 22) holding arms 70 are connected to the lower part of the moving table 43 and hold the tool holder 11. The tool magazine 40 circulates the moving table 43 along the track of the rail 41c, and indexes the tool holder 11 held by the holding arm 70 to an exchange position below the main shaft 34. Since the rail base 41b is arranged with an inclination of approximately 30 degrees from the horizontal plane, the axial center direction of the tool magazine 40 is inclined approximately 30 degrees toward the spindle head 32 with respect to the vertical line (see FIG. 3).

  The moving table 43 includes a substrate 46, an inner roller 47, an outer roller 48, and a plurality of pins 49. The substrate 46 has a substantially rectangular shape. An inner roller 47 and an outer roller 48 are pivotally supported on the lower surface of the substrate 46 so as to be rotatable about an axis in the normal direction of the lower surface. The inner roller 47 and the outer roller 48 have a disk shape and have V grooves on the outer periphery. The inner roller 47 is fitted to the fitting portion 41d provided on the inner peripheral side surface of the rail 41c by a V-groove, and the outer roller 48 is fitted to the fitting portion 41d provided on the outer peripheral side surface of the rail 41c by the V-groove. . Six pins 49 stand on the upper surface of the substrate 46. A plurality of (for example, six) pins 49 on the moving table 43 are arranged so as to be arranged on a circumference concentric with the semicircle when the moving table 43 is located in a semicircular portion of the track of the rail 41c. It is. The plurality of pins 49 mesh with a gear 51 described later.

  The link member 44 connects the adjacent moving platforms 43. As shown in the figure, a connecting shaft body 49 b is provided on the second pin from both ends of the six pins 49 arranged on one moving table 43. The link member 44 is connected to the moving table 43 via a connecting shaft body 49b. Two holding arms 70 are attached to the lower part of the moving table 43. As will be described later, the holding arm 70 changes the tool when the lower end holding the tool holder 11 swings.

  Next, the configuration of the holding arm 70 will be described. As shown in FIG. 9, the holding arm 70 includes a mounting plate 73 that is attached to the moving table 43 described above. A support rod 74 is provided on the mounting plate 73, and the support rod 74 protrudes downward from the mounting plate 73.

  A block 74 b is provided at the lower end of the support rod 74. Guide plates 75 for guiding the rotation of an arm portion 76 to be described later are fixed to both side surfaces of the block 74b. The guide plates 75 are opposed to each other. In the side view, the guide plate 75 has a fan shape that extends downward with the upper end as a main component. At the upper end portion of the guide plate 75, an arm shaft hole 75a for inserting an arm shaft 77 described later is provided.

  Between both guide plates 75, a bent arm portion 76 that extends vertically and protrudes downward is provided. An arm shaft 77 is provided at the upper end portion of the arm portion 76, and both end portions of the arm shaft 77 protrude from both sides of the upper end portion of the arm portion 76. Tapers 77 a are formed at both ends of the arm shaft 77 along the circumferential direction. Both end portions of the arm shaft 77 are rotatably inserted into the arm shaft holes 75a of the respective guide plates 75. The lower end portion of the arm portion 76 is divided into two forks. A holding cylinder 78 that holds the grip pin unit 79 is formed at each tip of the lower end divided into two branches. The holding cylinder 78 has the same direction as the arm shaft 77 as an axial direction. The holding arm 70 is attached to the movable table 43 so that the arm shaft 77 follows the track tangent of the rail 41c.

A cover 176 is provided below the arm portion 76. The cover 176 is opposed to the lower surface of the lower portion of the arm portion 76, and extends in a diagonally upward direction from the lower plate portion 176a extending in the front-rear direction and the front end of the lower plate portion 176a along the middle portion of the arm portion 76. And an upper plate portion 176b. As shown in FIG. 10, a notch 177 extending in the front-rear direction is provided at the rear portion of the lower plate portion 176a. The notch 177 divides the lower plate portion 176a of the cover 176 into two forks, and the forked portion of the cover 176 and the forked portion of the arm portion 76 correspond to each other in shape, front-rear position, and left-right position. The cover 176 is fixed to the arm portion 76 by a bolt 178. The cover 176 has a through-hole into which the bolt 178 is inserted, and the arm portion 76 has a screw hole into which the bolt 178 is screwed.

  The grip pin unit 79 has a bottomed cylindrical holder 79a and a pin 79b accommodated in the holder 79a. The tip of the pin 79b protrudes from the holder 79a and is urged in the protruding direction by a spring (not shown) in the holder 79a. The tip end surface of the pin 79b has a curved shape protruding outward. The gripping pin units 79 are fitted into the holding cylinders 78 so that the tip surfaces of the pins 79b face each other. Both pins 79b are adapted to detach the tool holder 11. Both pins 79 b fit into the groove 11 c of the tool holder 11 and hold the tool holder 11.

  A first cam follower 71 is provided on the upper side of the arm shaft 77 to abut on an approach cam 61 described later. The first cam follower 71 protrudes upward. The first cam follower 71 is a circular roller and rotates around an axis parallel to the arm shaft 77. A second cam follower 72 that abuts on a separation cam 62 described later is provided in the middle of the arm portion 76. The second cam follower 72 is a circular roller and rotates about an axis parallel to the arm shaft 77.

  The holding arm 70 is swung by the cam mechanism 60 to replace the tool holder 11. A tool is attached to the tool holder 11. 11 is a perspective view schematically showing the cam mechanism 60 and the holding arm 70, FIG. 12 is a right side view schematically showing the cam mechanism and the holding arm when the spindle head is raised, and FIG. 13 is a spindle head. FIG. 6 is a right side view schematically showing the cam mechanism 60 and the holding arm 70 in a case where the arm is lowered. The front and rear, left and right, and top and bottom indicated by arrows in FIGS. 11 to 13 correspond to FIG.

  As shown in FIG. 11, the cam mechanism 60 includes an approach cam 61 and a separation cam 62. As shown in FIG. 12, when the spindle head 32 is raised during tool replacement, the first cam follower 71 of the holding arm 70 abuts on the approach cam 61, and a force acts on the first cam follower 71 from the approach cam 61.

  As shown by the arrow in FIG. 12, the holding arm 70 rotates counterclockwise around the arm shaft 77, and the arm portion 76 approaches the tool holder 11. The arm portion 76 holds the tool holder 11, the spindle head 32 is further raised, and the tool holder 11 is removed from the spindle 34. The tool magazine 40 rotates and the next tool holder 11 is arranged below the spindle head 32. The tool holder 11 is mounted with the next tool to be mounted on the main shaft 34.

  As shown in FIG. 13, when the spindle head 32 is lowered, the tool holder 11 is mounted on the spindle 34. The second cam follower 72 of the holding arm 70 contacts the separation cam 62, and a force acts on the second cam follower 72 from the separation cam 62.

  As shown by the arrows in FIG. 13, the holding arm 70 rotates clockwise around the arm shaft 77, and the arm portion 76 moves away from the tool holder 11. The spindle head 32 further descends and reaches the workpiece.

  The tools are roughly classified into a rotating tool rotating on the main shaft 34 and a turning tool 110 fixed on the main shaft 34. 14 is a perspective view of the tool holder 11 to which the turning tool 110 is mounted as viewed from above, and FIG. 15 is a perspective view of the tool holder 11 mounted to the spindle 34 as viewed from below.

  A holding groove 11 c into which the pin 79 b of the grip pin unit 79 is fitted is formed on the outer peripheral surface of the tool holder 11. The tool holder 11 is provided with a detent plate 11a that projects rearward.

  As shown in FIG. 15, the rotation stopper plate 11 a has a flange shape having a triangular shape in plan view, and the vicinity of one vertex is fixed to the lower surface of the tool holder 11 with a plurality of fixing bolts 11 d. The rotation stopper plate 11a is provided so as to project outward in the radial direction within a part of the outer periphery of the tool holder 11, specifically, within an angular range smaller than the semicircular circumference.

  In such a rotation stopper plate 11 a, two engagement holes 11 b are formed side by side on the circumference that is coaxial with the tool holder 11. These engagement holes 11b are elongated holes formed in the vicinity of the remaining two vertices of the rotation stopper plate 11a and extending in the radial direction. The illustrated engagement hole 11b is open on the outer periphery of the rotation stopper plate 11a, but this opening is not essential and may be a long hole closed in the rotation prevention plate 11a. On the upper surface of the rotation stop plate 11a, a convex portion 11e (interference portion) perpendicular to the rotation stop plate 11a is provided between the two engagement holes 11b. The convex portion 11e extends in the thickness direction of the rotation stopper plate 11a.

  On the lower surface of the spindle head 32 that supports the spindle 34, an engaging projection 32a that protrudes downward is provided at a rear position of the protruding portion of the spindle 34. As shown in FIG. 15, the engagement protrusion 32 a is supported so as to protrude downward on each support block 32 b fixed to the outer periphery of the lower end cylindrical portion of the spindle head 32. The engagement protrusion 32a is arranged at a position corresponding to the engagement hole 11b of the rotation stopper plate 11a.

  The engagement hole 11b and the engagement protrusion 32a of the rotation stop plate 11a are engaged as shown in the figure by mounting the turning tool 110 on the main shaft 34, and turning by turning around the axis of the turning tool 110 and radial force. The movement of the tool 110 is prevented, and the turning operation with high machining accuracy can be performed stably.

  An operator attaches a tool to the holding arm 70 of the tool magazine 40 in preparation for using the machine tool. When the turning tool 110 is attached to the holding arm 70, the operator must attach the tool holder 11 to the holding arm 70 in a locking posture in which the rotation stop plate 11 a can be locked to the spindle head 32. The operator places the rotation stop plate 11 a on the lower side of the cover 176 of the holding arm 70 and pushes the tool holder 11 inside the bifurcated portion of the arm portion 76.

  FIG. 16 is a perspective view schematically showing the tool holder 11 when the rotation stopper plate 11a is in a locking posture in which it can be locked to the spindle head 32. FIG. When the rotation stop plate 11a is in the locking posture in which the spindle head 32 is locked, in other words, when the convex portion 11e is arranged outside the arm portion 76, inside the portion of the arm portion 76 that is divided into two branches, The operator can push the tool holder 11 to the farthest part (frontmost part) of the portion divided into two forks, and the tool holder 11 can be securely held by the holding arm 70.

  FIG. 17 is a side view schematically illustrating the tool holder 11 when the posture of the rotation stopper plate 11a is opposite to the locking posture, and FIG. 18 is a posture in which the posture of the rotation stopper plate 11a is opposite to the locking posture. It is a partial side sectional view which shows the tool holder 11 in the case of being. An operator may mistakenly arrange the convex portion 11e inside the portion of the arm portion 76 divided into two forks. That is, the operator may erroneously attach the tool holder 11 to the holding arm 70 in a posture opposite to the locking posture.

  At this time, the convex part 11e contacts the innermost surface of the innermost part of the arm part 76 or the cover 176 that is divided into two parts. Since the convex portion 11e is arranged at a position separated from the tool holder 11, the operator cannot push the tool holder 11 to the innermost portion. The operator can notice that the tool holder 11 is mounted on the holding arm 70 in an incorrect posture by the convex portion 11e coming into contact with the arm portion 76 or the cover 176.

  In the machine tool according to the first embodiment, when the operator attaches the tool holder 11 holding the turning tool 110 to the holding arm 70 in a posture different from the locking posture, the convex portion 11e leads to the holding arm 70. The tool holder 11 is prevented from being attached. The operator notices that the turning tool 110 is about to be attached to the holding arm 70 in an incorrect posture, and can change the posture of the turning tool 110 to the locking posture and attach the turning tool 110 to the holding arm 70.

(Embodiment 2)
Hereinafter, the present invention will be described with reference to the drawings showing a machine tool according to a second embodiment. FIG. 19 is a perspective view schematically showing the holding arm 70 of the machine tool as viewed from below, and FIG. 20 is a perspective view schematically showing the tool holder 11 when the orientation of the detent plate 11a is opposite to the locking orientation. FIG. In FIG. 20, illustration of the turning tool 110 is omitted.

  As shown in FIG. 19, a convex portion 176 c perpendicular to the cover 176 protruding downward is provided at the innermost portion of the notch 177 in the cover 176 of the holding arm 70. The convex portion 176c is formed by bending a part of the cover 176. As shown in FIG. 20, when the operator mistakenly attaches the tool holder 11 to the holding arm 70 in a posture opposite to the locking posture, the peripheral surface (frontmost surface) of the rotation stop plate 11a is formed on the convex portion 176c. Abut. The convex portion 176c extends in the thickness direction of the rotation stopper plate 11a.

  Since the forefront of the rotation stop plate 11a and the tool holder 11 are separated from each other, the operator cannot push the tool holder 11 up to the innermost part of the arm portion 76 or the cover 176 which is divided into two portions. The operator can notice that the tool holder 11 is attached to the holding arm 70 in an incorrect posture by the convex portion 176c coming into contact with the arm portion 76 or the cover 176.

  In the machine tool according to the second embodiment, when the operator attaches the tool holder 11 to the holding arm 70 in a posture opposite to the locking posture, the convex portion 176c provided on the holding arm 70 is arranged around the rotation stopper plate 11a. Contact with the surface prevents the tool holder 11 from being attached to the holding arm 70.

  Of the configuration of the machine tool according to the second embodiment, the same reference numerals are given to the same configurations as those in the first embodiment, and detailed description thereof is omitted.

(Embodiment 3)
Hereinafter, the present invention will be described with reference to the drawings showing a machine tool according to a third embodiment. FIG. 21 is a perspective view schematically showing the holding arm 70 of the machine tool as viewed from below, and FIG. 22 is a perspective view schematically showing the tool holder 11 when the orientation of the detent plate 11a is opposite to the locking orientation. FIG. In FIG. 22, the description of the turning tool 110 is omitted.

  As shown in FIG. 21, the cover 176 is provided with a convex portion 76 a that protrudes downward next to the innermost portion of the notch 177. A through hole (not shown) for inserting the convex portion 76a is provided next to the innermost portion of the notch 177 in the cover 176. A screw hole (not shown) corresponding to the through hole is provided in the arm portion 76. A male screw is formed on the top of the convex portion 76a. The convex portion 76a is inserted into the through hole and screwed into the screw hole. As shown in FIG. 22, when the operator mistakenly attaches the tool holder 11 to the holding arm 70 in a posture opposite to the locking posture, the peripheral surface (front surface) of the detent plate 11a contacts the convex portion 76a. Touch. The convex portion 76a extends in the thickness direction of the rotation stopper plate 11a.

  Since the forefront of the rotation stop plate 11a and the tool holder 11 are separated from each other, the operator cannot push the tool holder 11 up to the innermost part of the arm portion 76 or the cover 176 which is divided into two portions. The operator can notice that the tool holder 11 is attached to the holding arm 70 in an incorrect posture by the convex portion 76a coming into contact with the arm portion 76 or the cover 176.

  In the machine tool according to the third embodiment, when the operator attaches the tool holder 11 to the holding arm 70 in a posture opposite to the locking posture, the convex portion 76a provided on the holding arm 70 is arranged around the rotation stopper plate 11a. Contact with the surface prevents the tool holder 11 from being attached to the holding arm 70.

  In the machine tool according to the second or third embodiment, a protrusion protruding forward may be provided on the front surface of the rotation stopper plate 11a. Since the protrusion comes into contact with the protrusion 76a, the rotation stopper plate 11a comes into contact with the protrusion 76a earlier than in the case where the protrusion is not provided. Therefore, the operator can quickly notice that the tool holder 11 is attached to the holding arm 70 in an incorrect posture.

  Of the configuration of the machine tool according to the third embodiment, the same reference numerals are given to the same configurations as those in the first or second embodiment, and detailed description thereof will be omitted.

32 Spindle head 11 Tool holder 110 Turning tool 34 Spindle 70 Holding arm (holding part)
77 Arm Axis (Axis)
11a Anti-rotation plate 11e, 76a, 176c Convex part (interference part)

Claims (3)

A tool including a spindle that is supported by the spindle head and rotates around the axis, and a turning tool is attached / detached via a tool holder, and a plurality of holding parts that hold the tool holder and can be rotated by an axis provided in the middle part a magazine, projecting radially outward on the outer periphery of the tool holder for holding the turning tool, and engaged with the spindle head, and a peripheral surface thereof is protruded portion protruding radially formed in detent plate If the operator is mounting the tool holder to the tool magazine, said a machine to the tool holder is held in the holding portion and the detent plate with lockable locking position to the spindle head ,
The holding portion includes an arm, a convex portion protruding in the thickness direction of the rotation stopper plate, and a cover provided on the arm,
Machine the tool holder, in the engagement posture different from the stop position, when it is held by the holding portion by the operator, the convex portion and the projecting portion is characterized that you interference. The cover has an arm shape with one end divided into two forks,
The machine tool according to claim 1, wherein the projecting portion to the convex portion arranged in the innermost part of the inner peripheral surface of the one end bifurcated, characterized in that the are to abut. In a tool holder used for holding a turning tool and mounting the turning tool on a spindle of a machine tool according to claim 1 or 2 .
When the tool holder that holds the turning tool is held by the holding portion in a posture different from the locking posture, an interference portion that interferes with the holding portion and the turning tool is provided on the detent plate. Tool holder characterized by

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