JP2015024459A - Tool detaching tool - Google Patents

Abstract

A tool removal tool that enables an operator to easily remove a tool attached to a tool grip of a machine tool manually.
When at least one of a first rotation member 110 and a second rotation member 130 is rotated, the first action portion 121 and the first action portion 121 are separated as the first grip portion 122 and the second grip portion 142 are separated from each other. As the second action part 141 approaches and the first grip part 122 and the second grip part 142 approach, the first action part 121 and the second action part 141 are separated. When the tool holder 7 is attached to the grip arm 60, a gap is formed between the grip arm 60 and the tool holder 7. The first action part 121 and the second action part 141 in a state of being close to each other can be inserted into a gap formed between the grip arm 60 and the tool holder 7.
[Selection] Figure 3

Description

  The present invention relates to a tool removal tool for removing a tool used in a machine tool from a tool grip.

  2. Description of the Related Art Conventionally, a machine tool that performs machining such as “thread cutting”, “drilling”, and “spot facing” on a workpiece using a tool mounted on a spindle is known. The machine tool includes a tool magazine for storing a large number of tools. The tool magazine includes a plurality of tool grips to which tools can be attached and detached. A machine tool can replace a tool mounted on a spindle using a plurality of tool grips (see, for example, Patent Document 1).

JP 2005-329493 A

  For example, during maintenance of a machine tool, an operator may manually remove a tool attached to a tool grip from the tool grip. The tool may hurt the operator's hand or the fine axis tool may be damaged. Therefore, the operator has to carefully perform the manual operation of removing the tool from the tool grip.

  An object of the present invention is to provide a tool removal tool that allows an operator to easily and manually remove a tool attached to a tool grip of a machine tool.

  A tool removal tool according to one aspect of the present invention is a tool grip that allows a tool to be attached and detached, and a spindle that can rotate the attached tool, and a tool grip that allows the tool to be attached and detached through an opening through which the tool can be inserted and removed. In a machine tool for processing a workpiece using the tool mounted on the spindle and exchanging the tool mounted on the spindle using the tool grip, the tool mounted on the tool grip is removed. A tool removing tool for extending a direction orthogonal to a single axis, the first rotary member and a second rotary member connected to be rotatable about the single axis, The first action part provided on one end side of the first turning member and the second action part provided on one end side of the second turning member are at least one of the first turning member and the second turning member. Proximity to each other with one rotation The first gripping portion provided on the other end side of the first rotating member and the second gripping portion provided on the other end side of the second rotating member are separated from each other by the first rotating member and the first rotating member. When the first gripping part and the second gripping part move in the direction of approaching each other as the first gripping part and the second gripping part move toward each other as at least one of the second pivoting members pivots, the first action part and the second action part A direction in which the first action part and the second action part approach each other when the action part moves in a direction away from each other and the first grip part and the second grip part move in a direction away from each other. The first action part and the second action part in the state of moving to each other and the gap are formed between the tool grip and the tool attached to the tool grip, and the opening across the tool Can be inserted into the gap located on the opposite side of the portion, and the gap Inserted the first acting portion to the opposite to the tool grip, the second acting portion which is inserted into the gap opposite to the tool.

  The tool removal tool of this aspect is a tool for removing a tool attached to a tool grip in a machine tool that processes a workpiece using a tool attached to a spindle and replaces the tool attached to the spindle using a tool grip. It is a removal tool. The tool removal tool includes first and second rotating members that are rotatably connected about one axis. When at least one of the first and second rotating members rotates, the first and second action portions approach each other as the first and second gripping portions are separated from each other, and the first and second gripping portions As the parts approach each other, the first and second working parts are separated from each other. When the tool is mounted on the tool grip via the opening, a gap is formed between the tool and the tool grip so as to be located on the side opposite to the opening with the tool interposed therebetween. The first and second action portions in a state of being close to each other can be inserted into a gap formed between the tool grip and the tool. The first action part inserted in the gap faces the tool grip, and the second action part inserted in the gap faces the tool.

  According to this, when the operator removes the tool from the tool grip, the first and second action portions in a state of being close to each other are inserted into the gap between the tool grip and the tool. The operator applies a force to the first and second gripping portions located at positions separated from each other so as to move in directions close to each other. Since the tool grip regulates the movement of the first action part, the second action part moves in a direction away from the first action part. Since the second action part presses the tool toward the opening, the tool is detached from the tool grip through the opening. Therefore, the operator can easily remove the tool attached to the tool grip of the machine tool manually.

  The tool grip may include a groove portion that forms the gap between the tool grip and the tool attached to the tool grip, and the first action portion may be a protrusion that can be disposed in the groove portion. In this case, when the tool is mounted on the tool grip, it is possible to reliably form a gap into which the first and second action portions in a state of being close to each other can be inserted.

  Each of the first gripping portion and the second gripping portion includes a plate-like portion that extends substantially parallel to the extending direction, and a portion of the first gripping portion that is farthest from the one axis is from the first action portion. Also, the distance from the one axis may be large, and the portion of the second gripping portion that is farthest from the one axis may have a larger distance from the one axis than the second action portion. In this case, the distance to each end portion of the first and second gripping portions serving as the force points is larger than the distance to the first and second acting portions serving as the action points with reference to one axis serving as the fulcrum. The second action portion presses the tool toward the opening with a force larger than the force applied by the operator to the first and second gripping portions. Therefore, the tool can be reliably removed from the tool grip while suppressing the force applied to the first and second gripping portions by the operator.

  The first gripping portion and the second gripping portion respectively extend in a direction different from the first plate-like portion from the first plate-like portion and the first plate-like portion extending in the extending direction from the one axis. A winding spring wound around the one axis, wherein one end of the winding spring is engaged with the second plate-like portion of the first gripping portion, and the winding spring The other end portion of the second gripping portion is locked to the second plate-like portion of the second gripping portion, and includes the winding spring that biases the first gripping portion and the second gripping portion away from each other. Good. In this case, in a state where the operator is not applying force to the first and second gripping portions, the winding spring holds the first and second action portions close to each other. Therefore, the operator can easily insert the first and second action portions into the gap between the tool grip and the tool.

  Of the first plate-like portion of the first grip portion, an end portion facing the second grip portion extends in a direction away from the second grip portion as the distance from the one axis increases. Of the first plate-like portions of the two gripping portions, the end portion facing the first gripping portion may extend in a direction away from the first gripping portion as the distance from the one axis increases. In this case, it is possible to prevent the first and second gripping portions from coming into contact with each other when the first and second gripping portions are moved in directions close to each other.

1 is a longitudinal sectional view showing main parts of a machine tool 1 and a tool changer 2. FIG. It is a top view of the grip arm 60 with which the tool holder 7 was mounted | worn. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is a perspective view of the tool removal tool 100 in a closed state. FIG. 3 is a part development view of the tool removal tool 100. 1 is a front view of a tool removal tool 100. FIG. FIG. 7 is a cross-sectional view in the direction of arrows BB in FIG. 6. It is a perspective view of the tool removal tool 100 of an open state. It is a top view of the grip arm 60 which removed the tool holder 7. FIG. It is CC sectional view taken on the line of FIG.

  An embodiment of the present invention will be described with reference to the drawings. In the following description, the left side of FIG. 1 is the front side of the machine tool 1, the right side is the rear side of the machine tool 1, the front side of the paper is the right side of the machine tool 1, and the depth side of the paper is the left side of the machine tool 1.

  With reference to FIG. 1, the structure of the machine tool 1 is demonstrated roughly. The machine tool 1 includes a base (not shown) serving as a base, a columnar column 10 erected on the upper rear side of the base, a spindle head 24 that can be raised and lowered along the front surface of the column 10, and an inner side of the spindle head 24. The tool changer 2 that automatically changes the rotatable spindle 30 and the tool body 5 mounted on the spindle 30 is mainly used.

  Frames 18 (only one frame 18 is shown in FIG. 1) are provided on the left and right side surfaces of the column 10 so as to extend forward with the spindle head 24 sandwiched therebetween. A magazine support base 37 is fixed to the front end portions of the pair of frames 18. The magazine support 37 supports the magazine body 41 of the tool changer 2. A magazine cover 19 having a substantially L-shaped cross section for covering and protecting the magazine main body 41 is fixed to the upper portion of the magazine support base 37.

  A servo motor 22 for rotating the spindle 30 is fixed to the upper part of the spindle head 24. A table device (not shown) that holds the work so as to be movable in the XY directions is installed on the base. In the machine tool 1, the spindle head 24 moves up and down, and the tool body 5 attached to the tool holder 7 mounted on the spindle 30 that rotates at high speed comes into contact with the workpiece, thereby performing desired processing on the workpiece held by the table device. . The machine tool 1 performs a machining operation on the workpiece in a machining area below the position of the spindle head 24 (Z-axis origin position) shown in FIG. The machine tool 1 performs an exchange operation of the tool body 5 in a tool exchange area (ATC area) above the Z-axis origin position.

  The raising / lowering mechanism of the spindle head 24 will be described. On the front surface of the column 10, an upper bearing portion 14 and a lower bearing portion 15 rotatably support a ball screw 12 extending in the vertical direction. The ball screw 12 is screwed through the nut 13 fixed to the back surface of the spindle head 24. The upper end portion of the ball screw 12 is connected to a drive shaft of a servo motor (not shown) fixed to the upper portion of the upper bearing portion 14 via a coupling (not shown). The ball screw 12 rotates in both forward and reverse directions by driving a servo motor. When the ball screw 12 rotates in the forward / reverse direction, the spindle head 24 connected to the nut 13 moves up and down as the nut 13 screwed to the ball screw 12 moves up and down.

  The internal structure of the spindle head 24 will be described. A main shaft 30 having a rotation shaft in the vertical direction is supported inside the front lower portion of the main shaft head 24 so as to be rotatable. The main shaft 30 is connected to a drive shaft of a servo motor 22 fixed to the upper portion of the main shaft head 24 via a coupling 23. The main shaft 30 is rotated by the rotational drive of the servo motor 22. A tapered hole 31 for mounting a taper mounting portion 7a, which will be described later, is provided at the tip (lower end) of the main shaft 30. When the taper mounting portion 7a is mounted in the taper hole 31, the holder clamping member 32 provided inside the main shaft 30 clamps (clamps) a pull stud 7b described later. When the draw bar 34 that is coaxially inserted into the hole passing through the center of the main shaft 30 presses the holder holding member 32 downward, the holder holding member 32 releases the clamp of the pull stud 7b.

  A clamp lever 20 that is substantially L-shaped when viewed from the right side is pivotally supported inside a rear upper part of the spindle head 24 via a support shaft 21 so as to be swingable. The clamp lever 20 includes a vertical lever 20b extending in the vertical direction and a horizontal lever 20a extending substantially horizontally from the lower end of the vertical lever 20b toward the front. The front end portion of the horizontal lever 20 a can be engaged with a pin 35 that protrudes perpendicularly to the draw bar 34. The plate cam body 36 is fixed to the upper back of the vertical lever 20b. The plate cam body 36 can be brought into contact with and separated from the cam follower 17 fixed to the upper bearing portion 14. A tension coil spring (not shown) is elastically interposed between the vertical lever 20b and the spindle head 24. When the clamp lever 20 is viewed from the right side, the tension coil spring always urges the clamp lever 20 clockwise, so that the downward pressing of the pin 35 by the horizontal lever 20a is always released.

  In a state where the taper mounting portion 7a of the tool holder 7 is mounted in the taper hole 31 of the main shaft 30, when the main shaft head 24 is raised, the plate cam body 36 provided on the clamp lever 20 slides on the cam follower 17. The clamp lever 20 rotates counterclockwise around the support shaft 21 when viewed from the right side. Along with this, the horizontal lever 20 a presses the pin 35 downward and biases the holder holding member 32 downward via the draw bar 34. The holder holding member 32 releases the holding of the pull stud 7b. Therefore, the tool holder 7 that holds the tool main body 5 can be attached to and detached from the main shaft 30.

  The structure of the tool changer 2 will be described. The tool changer 2 includes a cylindrical magazine main body 41 with a collar and a plurality of grip arms 60 (in FIG. 1, two upper and lower grip arms provided radially along the outer periphery of the back surface of the collar 42). Mainly 60). The magazine support 37 fixed to the frame 18 rotatably supports a support shaft 45 extending obliquely downward toward the front side of the machine tool 1. The magazine body 41 is extrapolated with respect to the support shaft 45. The magazine body 41 is arranged with the front surface of the circular collar 42 facing the front of the machine tool 1 and is rotatable about a support shaft 45.

  The magazine body 41 will be described. The magazine body 41 is mainly composed of a cylindrical boss portion 43 into which the support shaft 45 is inserted, and a flange portion 42 provided in a hook shape on the front end side of the outer peripheral surface of the boss portion 43. An indexing disc 47 centered on the support shaft 45 is externally fixed to the rear end portion of the boss portion 43. Roller-shaped cam followers (not shown) are provided on the back side of the indexing disc 47 (the surface facing the spindle head 24) corresponding to the positions where the plurality of grip arms 60 are provided.

  A casing 51 is fixed to the upper part of the magazine support 37. A servo motor 50 for rotational indexing of the magazine body 41 is fixed to the upper part of the casing 51. Inside the casing 51, a part of a rotary indexing mechanism including a plurality of gears (not shown) and a cam (not shown) is connected to the rotation shaft of the servomotor 50. A plurality of cam followers of the indexing disc 47 are sequentially fitted into cam grooves (not shown) formed in the cam of the rotary indexing mechanism. Therefore, the indexing disc 47 can perform intermittent indexing rotation, and one of the plurality of grip arms 60 can be indexed and positioned at the lowermost end of the magazine body 41. Although not shown, an encoder connected to a control device (not shown) of the machine tool 1 is fixed to the servo motor 50. The machine tool 1 controls the rotation index position of the magazine body 41 by performing feedback control of the servo motor 50 based on the output signal of the encoder.

  The structure of the grip arm 60 will be described with reference to FIGS. As shown in FIG. 1, a plurality of grip arms 60 (for example, 14) are fixed to the outer peripheral side of the back surface of the collar portion 42 of the magazine body 41 in the circumferential direction at a required central angle. The grip arm 60 uses a fulcrum base 62 (see FIGS. 2 and 3) fixed to the outer peripheral side of the back surface of the collar portion 42 of the magazine main body 41 as a fulcrum for the swing operation.

  As shown in FIGS. 2 and 3, the support shaft 67 provided on the fulcrum table 62 pivotally supports the grip arm 60. The grip arm 60 mainly includes an arm main body 61 extending in a substantially L shape, a gripping portion 63, and a cam follower support portion 65. The grip portion 63 is a Y-shaped member provided on the distal end side that is the free end of the arm main body 61, and can hold the tool holder 7. The cam follower support portion 65 protrudes from the portion where the support shaft 67 on the rear end side of the arm main body 61 is pivotally supported, and supports the cam follower 66 rotatably.

  The grip portion 63 includes a non-open / close type bifurcated portion 69 for sandwiching a V groove 7 e described later, and a pair of support pins 76 provided at the inner end portion of the bifurcated portion 69. The tool holder 7 can be attached to and detached from the tool mounting opening 63a which is a substantially circular opening region surrounded by the bifurcated portion 69. The support pin 76 is accommodated so as to be elastically retractable by a compression coil spring (not shown). The opening formed between the pair of support pins 76 is a tool insertion / removal port 77 for inserting / removing the tool holder 7 from / to the tool attachment port 63a from the front end side of the gripping portion 63.

  Cam followers 75 having the center of the support pin 76 as the center of rotation are provided on the outer sides of the ends divided on both sides of the bifurcated portion 69. The cam follower 75 slides along the cam surface of the fixed cam 29 (see FIG. 1) provided at the tip (lower end) of the spindle head 24. The tool holder 7 is inserted from the tool insertion / removal port 77 while guiding the grip portion 63 to the V groove 7e of the tool holder 7 attached to the spindle 30. When the bifurcated portion 69 of the guided gripping portion 63 is aligned with the V-groove 7e, the pair of support pins 76 come into contact with the V-groove 7e and move backward while pushing back the compression coil spring, so that the gripping portion 63 holds the tool holder 7 To do.

  The cam follower 66 slides along the cam surface of the movable cam 28 (see FIG. 1) fixed to the front surface of the spindle head 24. The movable cam 28 is supported on the front surface of the spindle head 24 by a support shaft (not shown). A compression coil spring (not shown) is provided between the movable cam 28 and the spindle head 24 to support the movable cam 28 in a state of being elastically floated. When the cam follower 66 slides on the cam surface of the movable cam 28, the arm body 61 swings around the support shaft 67. As a result, the cam follower 75 provided at the end of the bifurcated portion 69 is elastically pressed toward the cam surface of the fixed cam 29 (see FIG. 1) provided at the tip of the spindle head 24.

  The tool changer 2 (see FIG. 1) uses the above-described cam mechanism in accordance with the lifting and lowering operation of the spindle head 24, thereby indexing 1 to the lowest position of the magazine body 41 among the plurality of grip arms 60. Only the grip arm 60 of the book is swung. The grip portion 63 of the grip arm 60 at the index position moves between a “proximity position” that is close to the main shaft 30 and a “retraction position” that is separated from the main shaft 30.

  A key member 90 for positioning the tool holder 7 mounted on the tool mounting opening 63a is fixed on the base 69a of the pair of bifurcated portions 69 with a bolt 95. The distal end portion of the key member 90 protrudes from the base portion 69a to the tool mounting opening 63a and can be fitted into a key groove 7f described later. On the opposite side of the base member 69a from the key member 90, a groove 69b facing the tool mounting opening 63a is provided. When the tool holder 7 is attached to the tool attachment opening 63 a, the groove 69 b forms a gap with the tool holder 7. This gap is located on the side opposite to the tool insertion / removal port 77 with the tool holder 7 mounted on the tool mounting port 63a interposed therebetween.

  The grip arm 60 includes a plate-like arm cover 99. The arm cover 99 is a plate-like member that prevents chips and the like scattered during workpiece processing described later from adhering to the arm main body 61. The arm cover 99 includes a first cover part 99a, a pair of second cover parts 99b, and an opening part 99c. The first cover part 99 a is fixed at a position facing the arm body 61. The pair of second cover portions 99b extends from the first cover portion 99a to a position facing the cam follower 75. The open part 99c is a space that is surrounded by the pair of second cover parts 99b, and is open to the side opposite to the first cover part 99a (left side in FIG. 2). The grip part 63 and the groove part 69b are exposed to the side opposite to the main shaft 30 (the lower side in FIG. 3) through the opening part 99c.

  With reference to FIG.2 and FIG.3, the tool holder 7 is demonstrated. The tool holder 7 includes a taper mounting portion 7a (taper shank portion) which is a main body portion thereof, a pull stud 7b integrally formed at one end portion of the taper mounting portion 7a, and a flange formed integrally with the other end portion of the taper mounting portion 7a. And the like 7c. The tool body 5 extending on the opposite side to the pull stud 7b is attached to the hook-shaped portion 7c. An annular V groove 7e (see FIG. 3) and a pair of key grooves 7f (see FIG. 2) to be held by the grip arm 60 are recessed in the bowl-shaped portion 7c.

  With reference to FIGS. 1-3, the tool change operation which the tool change apparatus 2 performs is demonstrated. At the time of tool change, the spindle head 24 located in the machining area moves to the Z-axis origin position (see FIG. 1). As described above, the grip arm 60 at the index position moves from the retracted position to the close position. When the spindle head 24 reaches the Z-axis origin position, the tool holder 7 to which the used tool body 5 is attached fits into the tool mounting opening 63a through the tool insertion / removal opening 77 in the gripping portion 63 of the grip arm 60. . The pair of support pins 76 are locked in the V-groove 7e by the spring force, and the key member 90 is fitted in the key groove 7f to position the tool holder 7 in the tool insertion / removal port 77. Thereafter, as the spindle head 24 moves up in the ATC region, the holder holding member 32 presses the draw bar 34 to release the clamp on the pull stud 7b. As a result, the tool holder 7 held by the grip portion 63 of the grip arm 60 is extracted downward from the main shaft 30.

  Next, the magazine main body 41 rotates to position the grip arm 60 holding the tool holder 7 to which the tool main body 5 used for the next workpiece processing is attached at the index position. As the spindle head 24 descends in the ATC region, the tool body 5 used in the next workpiece machining is inserted into the spindle 30 from below. The holder clamping member 32 interrupts the pressing of the draw bar 34 and clamps the pull stud 7b, whereby the tool body 5 is mounted on the main shaft 30. Thereafter, as the spindle head 24 descends from the Z-axis origin position in the machining area, the grip arm 60 at the index position moves from the proximity position to the retracted position. In the machining area, workpiece machining is performed using a new tool body 5.

  For example, during maintenance of the machine tool 1, the operator may manually remove the tool holder 7 attached to the grip arm 60 from the grip arm 60. An operator removes the tool holder 7 from the grip arm 60 using the tool removal tool 100 shown in FIG. The tool removal tool 100 will be described with reference to FIGS.

  As shown in FIG. 4, the tool removal tool 100 includes a first rotating member 110, a second rotating member 130, and a connecting member 150. The first rotating member 110 and the second rotating member 130 are a pair of members extending in an extending direction (vertical direction in FIG. 4) perpendicular to one axis (a trunk portion 151b of a bolt 151 described later). The first rotating member 110 and the second rotating member 130 are opposed to each other in the axial direction in which one axis extends (the direction in which the one-dot chain line shown in FIG. 5 extends), and a pair of plate-like bodies having substantially the same length in the extending direction. It is. The connecting member 150 is a member that connects and supports the first rotating member 110 and the second rotating member 130 so as to be rotatable about one axis. In the following description, the rotation centers of the first rotation member 110 and the second rotation member 130 are referred to as “one axis”.

  As shown in FIGS. 5 and 6, the first rotating member 110 includes a first plate portion 111, a second plate portion 112, and a third plate portion 113. The first plate portion 111 is a flat plate portion extending substantially perpendicular to the axial direction. The first plate portion 111 includes a working side portion 111a, a connecting portion 111b, a gripping side portion 111c, and an insertion hole 115. The insertion hole 115 is a circular hole that penetrates the first plate portion 111 in the axial direction and can be inserted into a body portion 151b of a bolt 151 described later. The working side portion 111a is a flat plate portion that extends from the insertion hole 115 to one side in the extending direction (upper side in FIG. 6). The connecting portion 111b is a flat plate portion that extends from the insertion hole 115 to the opposite side to the later-described second plate portion 112 (lower right side in FIG. 6). The gripping side portion 111c extends from the end portion in the direction separating from the insertion hole 115 in the connecting portion 111b (in FIG. 6, the lower right end portion of the connecting portion 111b) to the other side in the extending direction (lower side in FIG. 6). It is a flat plate part.

  The 2nd board part 112 is extended in the extending direction along the edge part of the action | operation side part 111a. The second plate portion 112 protrudes from the working side portion 111a toward the one side in the axial direction (lower left side in FIG. 5) by a predetermined width substantially parallel to the axial direction. The second plate portion 112 is a rectangular flat plate portion having a short side in the axial direction and a long side in the extending direction.

  The third plate portion 113 extends in the extending direction along the edge portion of the grip side portion 111c. The third plate portion 113 protrudes from the holding side portion 111c by a predetermined width so as to be slightly inclined toward the axial line side (left side in FIG. 5) rather than one side in the axial direction. The third plate portion 113 is a rectangular flat plate portion having a short side in the direction slightly inclined with respect to the axial direction and a long side in the extending direction length. A bent portion 114 extending substantially parallel to the extending direction is formed at a position where the grip side portion 111c and the third plate portion 113 are connected. The bent portion 114 has a groove portion in which the grip side portion 111c and the third plate portion 113 form an acute angle and extend substantially parallel to the extending direction.

  The first action part 121 is a part that comes into contact with the grip arm 60 when the tool holder 7 is removed from the grip arm 60, and is provided on one end side (upper side in FIG. 5) of the first rotating member 110 in the extending direction. The 1st action part 121 is a projection part provided in the end side end part (upper end part in Drawing 5) of the extending direction in the 2nd board part 112. As shown in FIG. The first gripping part 122 is a part that the operator grips when removing the tool holder 7 from the grip arm 60, and is provided on the other end side (lower side in FIG. 5) in the extending direction of the first rotating member 110. . The first grip portion 122 is a handle that includes a grip side portion 111 c, a third plate portion 113, and a bent portion 114. In addition, the part (the other end side edge part of the 1st holding | grip part 122) most distant from the axis line in the 1st holding part 122 has the distance from an axis line larger than the 1st action part 121. FIG.

  As shown in FIGS. 5 and 6, the second rotating member 130 has a first plate portion 131 and a second plate portion 132. The first plate portion 131 is a flat plate portion that is substantially perpendicular to the axial direction. The first plate portion 131 has an insertion hole 135. The insertion hole 135 is a circular hole that penetrates the first plate portion 131 in the axial direction and can be inserted into a body portion 151b of a bolt 151 described later. The second plate portion 132 extends in the extending direction along the edge portion of the first plate portion 131. The second plate portion 132 protrudes from the first plate portion 131 toward the one side in the axial direction by a predetermined width substantially parallel to the axial direction. The second plate portion 132 is a rectangular flat plate portion having a short length in the axial direction and a long side in the extending direction.

  The second action part 141 is a part that comes into contact with the tool holder 7 when the tool holder 7 is removed from the grip arm 60, and is provided on one end side (upper side in FIG. 5) of the second rotating member 130 in the extending direction. The second action part 141 is a protrusion provided at one end of the second plate part 132 in the extending direction (upper end in FIG. 5). Note that the protruding end of the second action part 141 extends to a position farther from the axis than the protruding end of the first action part 121. The axial length of the second action part 141 is smaller than the axial length of the first action part 121.

  The second gripping part 142 is a part that the operator grips when removing the tool holder 7 from the grip arm 60, and is provided on the other end side (lower side in FIG. 5) of the second rotating member 130 in the extending direction. . The second gripping portion 142 is a handle formed of a portion of the first plate portion 131 and the second plate portion 132 on the other end side (lower side in FIG. 5) in the extending direction from the axis. In addition, the part (the other end side end part of the second gripping part 142) farthest from the axis line in the second gripping part 142 has a larger distance from the axis line than the second action part 141.

  As shown in FIGS. 5 and 7, the connecting member 150 includes a bolt 151, a support member 152, a winding spring 153, and a nut 154. The bolt 151 has a head portion 151 a and a body portion 151 b that can be fastened to the nut 154. The support member 152 includes a washer 152a having a larger diameter than the head 151a and a cylindrical portion 152b communicating with the washer 152a. The cylindrical portion 152b can be inserted through the body portion 151b. The winding spring 153 includes a winding portion 153a around which a metal wire is wound, and a pair of arm portions 153b and 153c extending in different directions from both ends of the winding portion 153a. The winding portion 153a has a smaller diameter than the washer 152a and can be inserted through the cylindrical portion 152b.

  The first rotating member 110 and the second rotating member 130 are formed by inserting the first plate portion 111 on one side (the lower left side in FIG. 5) in the axial direction with respect to the first plate portion 131 and inserting holes 115 and 135. Are arranged so as to communicate with each other. The cylindrical portion 152 b of the support member 152 is inserted into the winding portion 153 a of the winding spring 153 and communicates with the insertion holes 115 and 135 on one side in the axial direction with respect to the first plate portion 111. The body 151b of the bolt 151 is inserted into the cylindrical portion 152b and the insertion holes 115 and 135 from one side in the axial direction. The distal end portion of the inserted body portion 151 b protrudes from the second rotating member 130 to the other axial side (upper right side in FIG. 5) and is fastened to the nut 154.

  On one end side (the upper side in FIG. 5) of the tool removal tool 100, the first action part 121 and the second action part 141 are opposed to each other. The first action part 121 and the second action part 141 are close to or separated from each other with the rotation of at least one of the first rotation member 110 and the second rotation member 130. On the other end side (the lower side in FIG. 5) of the tool removal tool 100, the first grip portion 122 and the second grip portion 142 face each other. The first gripping part 122 and the second gripping part 142 are close to or separated from each other with the rotation of at least one of the first rotating member 110 and the second rotating member 130. When the first gripping part 122 and the second gripping part 142 move in a direction approaching each other, the first action part 121 and the second action part 141 move in a direction away from each other. When the first gripping part 122 and the second gripping part 142 move in a direction away from each other, the first action part 121 and the second action part 141 move in a direction close to each other.

  The distal end portion of the arm portion 153b of the winding spring 153 is disposed in the groove portion of the bent portion 114 and is locked to the third plate portion 113 by the urging force of the winding portion 153a. The distal end portion of the arm portion 153c of the winding spring 153 is disposed on the other end side in the extending direction from the insertion hole 135 and is locked to the second plate portion 132 by the urging force of the winding portion 153a. The arm portions 153b and 153c urge the first grip portion 122 and the second grip portion 142 in directions away from each other. The 1st rotation member 110 and the 2nd rotation member 130 rotate centering | focusing on the trunk | drum 151b of the volt | bolt 151 to the position where the 2nd board parts 112 and 132 contact each other. In a state where no external force is applied to the first gripping part 122 and the second gripping part 142, the first gripping part 122 and the second gripping part 142 are held at positions separated from each other, and the first action part 121 and the second action part 141 are held at positions close to each other. As shown in FIG. 4, the tool removal tool 100 is in a closed state.

  An end side portion 119 (see FIG. 6) of the grip side portion 111 c is located at a position closest to the second grip portion 142 in the first grip portion 122. The end side portion 119 extends in a direction away from the second gripping portion 142 as the distance from one axis increases. An end side portion 139 (see FIG. 6) of the first plate portion 131 is located closest to the first grip portion 122 among the second grip portions 142. The end side part 139 extends in a direction away from the first grip part 122 as the distance from one axis increases. The end sides 119 and 139 are inclined in a direction away from each other toward a direction away from one axis.

  As shown in FIG. 8, for example, when an operator grips the first gripping part 122 and the second gripping part 142 and applies a force, the first gripping part 122 and the second gripping part 142 are subjected to the urging force of the winding spring 153. Move in the direction of approaching each other. The first rotating member 110 and the second rotating member 130 rotate around the trunk portion 151b of the bolt 151 so that the second plate portions 112 and 132 are separated from each other. Thereby, in a state where an external force is applied to the first grip portion 122 and the second grip portion 142, the first grip portion 122 and the second grip portion 142 move to positions close to each other, and the first action portion 121 and the second grip portion 142. The action part 141 moves to a position separated from each other. The tool removal tool 100 is in an open state.

  A usage example of the tool removal tool 100 will be described with reference to FIGS. 2, 3, 9, and 10. First, the machine tool 1 raises the spindle head 24 to the ATC region and moves the target grip arm 60 to the index position. As a result, the operator can manually remove the tool holder 7 from the grip arm 60 at the index position.

  As shown in FIGS. 2 and 3, the operator grasps the first gripping part 122 and the second gripping part 142, and moves the first action part 121 and the second action part 141 close to each other to the arm cover 99. Is inserted into the open portion 99c from below and disposed in a gap formed between the groove 69b and the tool holder 7. The second action part 141 extending upward from the first action part 121 contacts the lower surface of the base part 69a. The first action part 121 faces the groove part 69 b of the grip arm 60, and the second action part 141 faces the bowl-like part 7 c of the tool holder 7.

  As shown in FIGS. 9 and 10, the operator applies a gripping force so that the first grip portion 122 and the second grip portion 142 are close to each other. Since the first action part 121 is engaged with the groove 69 b, only the second action part 141 moves in a direction away from the first action part 121. The second action part 141 moves to the tool mounting port 63a side along the lower surface of the base part 69a, contacts the hook-like part 7c of the tool holder 7, and presses it to the tool insertion / removal port 77 side. As a result, the tool holder 7 is detached from the tool mounting opening 63a toward the tool insertion / removal opening 77. The operator collects the tool holder 7 detached from the tool mounting opening 63a.

  As described above, the tool removal tool 100 according to the present embodiment processes a workpiece using the tool body 5 attached to the spindle 30 and replaces the tool body 5 attached to the spindle 30 using the grip arm 60. In the machine tool 1 to be used, the tool body 5 attached to the grip arm 60 is used to be removed. The tool removal tool 100 includes a first rotating member 110 and a second rotating member 130 that are rotatably connected about one axis. When at least one of the first rotation member 110 and the second rotation member 130 is rotated, the first action part 121 and the second action part are separated as the first holding part 122 and the second holding part 142 are separated from each other. As 141 approaches and the 1st holding part 122 and the 2nd holding part 142 approach, the 1st action part 121 and the 2nd action part 141 are separated. When the tool holder 7 is attached to the grip arm 60 via the tool insertion / removal port 77, a gap is formed between the grip arm 60 and the tool holder 7 and located on the opposite side of the tool insertion / removal port 77 with the tool holder 7 interposed therebetween. To do. The first action part 121 and the second action part 141 in a state of being close to each other can be inserted into a gap formed between the grip arm 60 and the tool holder 7. The first action part 121 inserted in the gap faces the grip arm 60, and the second action part 141 inserted in the gap faces the tool holder 7.

  When the operator removes the tool holder 7 from the grip arm 60, the first action part 121 and the second action part 141 that are close to each other are inserted into the gap between the grip arm 60 and the tool holder 7. The operator applies a force to the first gripping part 122 and the second gripping part 142 that are spaced apart from each other so as to move in directions close to each other. Since the grip arm 60 restricts the movement of the first action part 121, the second action part 141 moves in a direction away from the first action part 121. Since the second action portion 141 presses the tool holder 7 toward the tool insertion / removal port 77, the tool holder 7 is detached from the grip arm 60 via the tool insertion / removal port 77. Therefore, the operator can easily remove the tool holder 7 attached to the grip arm 60 of the machine tool 1 manually.

  The grip arm 60 includes a groove 69 b that forms a gap with the tool holder 7 attached to the grip arm 60. The 1st action part 121 is a projection which can be arranged in slot 69b. Therefore, when the tool holder 7 is attached to the grip arm 60, it is possible to reliably form a gap into which the first action part 121 and the second action part 141 that are close to each other can be inserted.

  The first holding part 122 includes a third plate part 113 extending substantially parallel to the extending direction. The second gripping portion 142 includes a part of the second plate portion 132 that extends substantially parallel to the extending direction. The part of the first grip 122 that is farthest from one axis has a larger distance from the one axis than the first action part 121. The part of the second gripping part 142 that is farthest from one axis has a larger distance from the one axis than the second action part 141. Thereby, the tool removal tool 100 is based on one axis as a fulcrum, and the distance to each end of the first gripping part 122 and the second gripping part 142 as the force points is the first action part 121 and the first action point as the action points. It is larger than the distance to the second action part 141. The second action portion 141 presses the tool holder 7 toward the tool insertion / removal port 77 with a force larger than the force applied by the operator to the first grip portion 122 and the second grip portion 142. Therefore, the tool holder 7 can be reliably removed from the grip arm 60 while suppressing the force applied by the operator to the first grip portion 122 and the second grip portion 142.

  The first grip portion 122 includes a grip side portion 111c of the first plate portion 111 extending from one axis in the extending direction, and a third plate portion 113 extending from the grip side portion 111c in a direction different from the grip side portion 111c. The second gripping part 142 includes a part of the first plate part 131 extending in the extending direction from one axis and a part of the second plate part 132 extending from the first plate part 131 in a direction different from the first plate part 131. Including. The winding spring 153 wound around one axis has the arm portion 153b locked to the third plate portion 113, the arm portion 153c locked to the second plate portion 132, and the first gripping portion 122 and the second gripping portion. The parts 142 are urged away from each other. Thereby, when the operator is not applying force to the first gripping part 122 and the second gripping part 142, the winding spring 153 holds the first action part 121 and the second action part 141 close to each other. Therefore, the operator can easily insert the first action part 121 and the second action part 141 into the gap between the grip arm 60 and the tool holder 7.

  Of the grip side portion 111c of the first grip portion 122, the end portion 119 facing the second grip portion 142 extends in a direction away from the second grip portion 142 as the distance from one axis increases. Of the first plate portion 131 of the second grip portion 142, the end portion 139 that faces the first grip portion 122 extends in a direction away from the first grip portion 122 as the distance from one axis increases. Therefore, when the 1st holding part 122 and the 2nd holding part 142 move to the direction which adjoins mutually, it can suppress that the 1st holding part 122 and the 2nd holding part 142 contact.

  In the above embodiment, the tool holder 7 corresponds to a “tool” of the present invention. The tool insertion / removal port 77 corresponds to the “opening” of the present invention. The grip arm 60 corresponds to the “tool grip” of the present invention. The groove 69b corresponds to the “groove” of the present invention. Part of the third plate portion 113 and the second plate portion 132 corresponds to the “plate portion” of the present invention. Each of the holding side portion 111c and the first plate portion 131 of the first plate portion 111 corresponds to a “first plate-like portion” of the present invention. Part of the third plate portion 113 and the second plate portion 132 corresponds to the “second plate-like portion” of the present invention.

  Needless to say, the tool changer of the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the first action part 121 inserted into the gap may be opposed to a part of the grip arm 60 that is different from the groove part 69b (for example, the base part 69a of the bifurcated part 69, the first cover part 99a of the arm cover 99, etc.). The 2nd action part 141 inserted in the crevice may counter a part (for example, tool main part 5 grade | etc.) Different from the bowl-shaped part 7c in the tool holder 7. FIG. Instead of the winding spring 153, another elastic member (for example, a leaf spring) may be used.

DESCRIPTION OF SYMBOLS 1 Machine tool 2 Tool changer 7 Tool holder 30 Spindle 60 Grip arm 69b Groove part 77 Tool insertion / removal port 100 Tool removal tool 110 First rotation member 111 First plate part 111c Grasping side part 113 Third plate part 119 End part 121 First action part 122 First grip part 130 Second rotating member 131 First plate part 132 Second plate part 139 End side part 141 Second action part 142 Second grip part 153 Winding spring

Claims (5)

A spindle that can be attached to and detached from the tool and that can rotate the attached tool, and a tool grip that can be attached to and detached from the tool through an opening through which the tool can be inserted and removed. In a machine tool for processing a workpiece using, and exchanging the tool mounted on the spindle using the tool grip, a tool removal tool for removing the tool mounted on the tool grip,
A pair of members extending in an extending direction perpendicular to one axis, the first rotating member and the second rotating member that are rotatably connected around the one axis;
The first action part provided on one end side of the first turning member and the second action part provided on one end side of the second turning member are at least one of the first turning member and the second turning member. Move closer to or away from each other with one rotation,
The first gripping portion provided on the other end side of the first rotating member and the second gripping portion provided on the other end side of the second rotating member are the first rotating member and the second rotating member. Move closer to or away from each other with the rotation of at least one of
When the first gripping part and the second gripping part move in a direction approaching each other, the first action part and the second action part move in a direction away from each other, and the first gripping part and the first gripping part When the two gripping parts move in a direction away from each other, the first action part and the second action part move in a direction close to each other,
The first action part and the second action part in a state of being close to each other are a gap formed between the tool grip and the tool attached to the tool grip, and opposite to the opening part across the tool. Can be inserted into the gap located on the side,
The tool removal tool, wherein the first action part inserted into the gap faces the tool grip, and the second action part inserted into the gap faces the tool. The tool grip includes a groove portion that forms the gap with the tool attached to the tool grip,
The tool removal tool according to claim 1, wherein the first action part is a protrusion that can be arranged in the groove part. Each of the first gripping portion and the second gripping portion includes a plate-like portion extending substantially parallel to the extending direction,
In the first grip part, the part farthest from the one axis has a larger distance from the one axis than the first action part,
3. The tool removal tool according to claim 1, wherein a portion of the second grip portion that is farthest from the one axis has a larger distance from the one axis than the second action portion. The first gripping portion and the second gripping portion respectively extend in a direction different from the first plate-like portion from the first plate-like portion and the first plate-like portion extending in the extending direction from the one axis. Including a second plate-like portion,
A winding spring wound around the one axis, wherein one end of the winding spring is locked to the second plate-like portion of the first gripping portion, and the other end of the winding spring is the second gripping 4. The coil spring according to claim 1, further comprising: a spring that engages with the second plate-like portion of the portion and biases the first gripping portion and the second gripping portion in a direction separating from each other. The tool removal tool according to any one of the above. Of the first plate-like portion of the first grip portion, the end portion facing the second grip portion extends in a direction away from the second grip portion as the distance from the one axis increases.
Of the first plate-like portion of the second gripping portion, an end portion facing the first gripping portion extends in a direction away from the first gripping portion as the distance from the one axis increases. The tool removal tool according to claim 4.

Images