JP5991957B2 - Tool holder - Google Patents

Description

  The present invention relates to a tool holder for holding a tool used in a machine tool.

  In general, a machine tool includes a tool magazine for storing a plurality of tools. Patent Document 1 discloses a tool magazine including a chain in which a through hole is provided in a link and a tool holding body that is fitted and held in the through hole and holds a tool.

  The tool holder has a cylindrical shape, a tool pot into which a tool is inserted at one end, a holding mechanism that is positioned in the tool pot and holds the inserted tool, and supports the holding mechanism in the tool pot. A support tube.

  The holding mechanism includes a slide pin that is supported so as to be movable in the axial direction in the support cylinder, and a ball that is provided at one end of the support cylinder and holds the tool. The diameter of one end of the slide pin is larger than the diameter of the other part.

  A through hole is provided in a side surface portion at one end of the support cylinder, and the slide pin is arranged in the support cylinder so that the one end faces the through hole. The other end of the slide pin protrudes from the support tube.

  The ball is positioned closer to the other end than the one end of the slide pin in the support cylinder, and faces the through hole. The diameter of the ball is larger than the diameter of the through hole. The slide pin is urged toward the other end by the urging member. One end of the slide pin presses the ball radially outward, and a part of the ball protrudes radially outward from the through hole and fits into the through hole. The slide pin is locked to the ball fitted in the through hole.

  The tool has a bottomed cylindrical holder, and a groove that engages the ball is formed on the inner peripheral surface of the holder. When the tool is inserted into the tool pot from the holder side, the ball protruding from the through hole is engaged with the groove of the holder, and the tool is held by the tool holder. At this time, a force acts on the slide pin from the tool via the ball, and the slide pin moves slightly (for example, 0.4 mm) toward one end.

  On the other hand, when the slide pin moves toward one end against the urging force of the urging member, the ball is positioned between the middle portion of the slide pin (the portion having a smaller diameter than the one end) and the support tube. Moves radially inward and the ball no longer protrudes from the through hole. Therefore, the engagement of the holder with the groove is also released, and the tool is removed from the tool holder. At this time, since the force acting from the tool is released, the slide pin moves to the other end side.

  When the tool is held, the slide pin moves to one end side. When the tool is not held, the slide pin moves to the other end side, so the other end of the slide pin protrudes from the support tube. The amount of protrusion also varies.

  The machine tool main body is provided with a distance sensor that measures the distance to the other end of the slide pin. As described above, the amount of protrusion of the other end of the slide pin protruding from the support tube also varies depending on the presence or absence of a tool. Therefore, the machine tool detects the presence or absence of a tool based on the detection value of the distance sensor. It was.

JP 2011-212769 A

  However, the variation of the protruding amount of the slide pin is small (for example, 0.4 mm), and the accuracy of detecting the presence or absence of the tool is low. In order to cope with this, it is conceivable to provide a sensor (for example, an optical sensor) for detecting the presence or absence of a tool at one end of a tool pot into which a tool is inserted, and to detect the presence or absence of a tool. Depending on the specification, a sensor cannot be provided in the tool pot. Moreover, when a sensor is provided in a tool pot, a sensor will be attached for every tool pot, and manufacturing cost will increase.

  This invention is made | formed in view of the situation which concerns, and it aims at providing the tool holding body which can detect the presence or absence of a tool accurately, without providing a sensor in a tool pot.

A tool holder according to the present invention has a cylindrical shape, a tool pot into which a tool is inserted at one end, and a support portion that is disposed inside the tool pot and supports a holding mechanism that holds the tool. A tool holder comprising: a movable body that penetrates the support portion and protrudes from the support portion toward one end portion of the tool pot, and is movable in an axial length direction; and the movable body is disposed on one end portion side of the tool pot. An urging member for urging, and when the moving body abuts against a tool inserted into one end of the tool pot, the moving body moves against the urging force of the urging member, Ri Citea so as to protrude from the other end of the tool pot, the movable body is in contact with the inserted tool, that having a plurality of contact portions which are equidistantly along the circumferential direction of the tool pot It is characterized by that.
A tool holder according to the present invention has a cylindrical shape, a tool pot into which a tool is inserted at one end, and a support portion that is disposed inside the tool pot and supports a holding mechanism that holds the tool. A tool holder comprising: a movable body that penetrates the support portion and protrudes from the support portion toward one end portion of the tool pot, and is movable in an axial length direction; and the movable body is disposed on one end portion side of the tool pot. An urging member for urging, and when the moving body abuts against a tool inserted into one end of the tool pot, the moving body moves against the urging force of the urging member, It protrudes from the other end of the tool pot, and the moving body has an abutting portion that abuts on the inserted tool and is disposed at a position radially away from the axis of the tool pot. It is characterized by.

In the present invention, when a tool is inserted into one end of the tool pot, the moving body projects from the other end of the tool pot. By providing a proximity sensor at a position facing the other end of the tool pot in the machine tool body, the machine tool detects the presence or absence of a tool based on the distance between the proximity sensor and the moving body.
The plurality of contact portions are equally distributed along the circumferential direction, and have rotational symmetry with the axis of the tool pot as the rotation axis. When the tool is inserted into the tool pot, a force in the axial direction acts on each contact portion from the tool. Since each contact part has rotational symmetry, it is avoided that force concentrates on any contact part. As a result, it is possible to prevent the moving body from tilting along the direction intersecting the axial length direction, and to realize smooth movement of the moving body in the axial length direction.

  The tool holder according to the present invention includes a storage chamber that stores the biasing member, the moving body has a protruding portion that protrudes in a radial direction of the tool pot, and the protruding portion is located in the receiving chamber. When the tool is not inserted in the tool pot, the biasing force of the biasing member is used to lock the wall of the storage chamber.

  In the present invention, when the tool is not inserted into the tool pot, the protruding portion comes into contact with and locks against the wall surface of the storage chamber by the urging force of the urging member. it can.

  In the tool holder according to the present invention, when a tool is inserted into one end of the tool pot, the moving body protrudes from the other end of the tool pot. Therefore, by providing a proximity sensor at a position facing the other end of the tool pot in the machine tool body, the machine tool can accurately detect the presence or absence of a tool based on the distance between the proximity sensor and the moving body. . Therefore, the machine tool can reliably detect the presence or absence of a tool without providing a proximity sensor on the tool holder.

It is a schematic longitudinal cross-sectional view of the tool holder which concerns on Embodiment 1 in the case where the tool is not inserted. It is the schematic side view which visually recognized the tool holder in the case where the tool is not inserted from the left side. It is a perspective view which briefly shows each component which comprises a moving body. It is a perspective view which briefly shows an example of a tool. It is a schematic longitudinal cross-sectional view of a tool holder when a tool is inserted. It is a schematic longitudinal cross-sectional view of the tool holder which concerns on Embodiment 2 when the tool is not inserted. It is a schematic longitudinal cross-sectional view of a tool holder when a tool is inserted. FIG. 6 is a perspective view schematically showing another example of the tool.

(Embodiment 1)
Hereinafter, the present invention will be described with reference to the drawings showing a tool holder 1 according to a first embodiment. In the following description, the one end side of the tool holder 1 is the left side, the other end side is the right side, and left and right are shown in FIGS. 1, 5, 6, and 7.
FIG. 1 is a schematic longitudinal sectional view of the tool holder 1 when the tool 100 is not inserted, and FIG. 2 is a schematic side view of the tool holder 1 viewed from the left side when the tool 100 is not inserted. .

  The tool holder 1 is arranged in a cylindrical tool pot 10, a holding mechanism 30 that holds a tool 100 (see FIG. 4 described later), and the holding mechanism 30 is a tool pot. 10 and a support portion 40 that is supported in the inside. The tool pot 10 has a cylindrical shape, and includes a housing 11 into which the tool 100 is inserted from the left end portion, and a moving body support portion 60 that is fitted to the right end portion of the housing 11 and supports a moving body 50 described later. .

  The diameter of the left end portion of the housing 11 is larger than other portions. As shown in FIG. 2, the inner peripheral surface of the left end portion of the housing 11 has a triangular shape when viewed from the axial length direction. A sleeve 12 is fitted into the left end portion of the housing 11. The sleeve 12 has a shape that follows the inner peripheral surface of the left end portion of the housing 11 and is formed of a resin member. The left end portion of the sleeve 12 has a flange 12a. The sleeve 12 is fitted into the housing 11 so that the flange 12 a is locked to the end surface of the housing 11.

  The inner diameter of the middle part of the housing 11 is larger than the inner diameter of the left end part. The inner peripheral surfaces of the left end part and the middle part are connected via the inclined surface 13. The inner diameter of the right end portion of the housing 11 is larger than the inner diameter of the midway portion. Steps 14 are formed in the connecting portions on the inner peripheral surfaces of the midway part and the rear end part.

  A cylindrical support portion 40 is fitted in the housing 11. The diameter of the left portion 41 of the support portion 40 is smaller than the diameter of the midway portion 42. The diameter of the right portion 43 of the support portion 40 is larger than the diameter of the midway portion 42. The support portion 40 is inserted into the housing 11 from the opening on the right side of the housing 11. Each of the left portion 41 and the midway portion 42 of the support portion 40 is located inside the left end portion and the midway portion of the housing 11. The right portion 43 of the support portion 40 is locked to the step portion 14 and is located inside the right end portion of the housing 11. As shown in FIG. 1, a guide pin 45 that guides the tool 100 protrudes to the left from the left end surface of the middle portion 42 of the support portion 40. The guide pin 45 is disposed at a position separated from the slide pin 31 in the radial direction.

  As shown in FIG. 2, a plurality (three in this embodiment) of insertion holes 46 into which contact pins 51 described later are inserted are formed in the middle portion 42 and the right portion 43 of the support portion 40. The insertion hole 46 penetrates the midway part 42 and the right part 43 in the axial direction.

  A columnar passage 47 penetrating in the axial length direction is formed in the axial center portion of the support portion 40. The diameter of the left end part and the right end part of the passage 47 is larger than the diameter of the midway part. The left end portion of the passage 47 forms a ball chamber 48 in which a ball 32 to be described later is disposed, and the right end portion of the passage 47 forms a storage chamber 49 for storing an elastic member 33 to be described later. A through hole 48 a is provided on the side surface of the ball chamber 48.

  The holding mechanism 30 is provided in the passage 47. The holding mechanism 30 is disposed in the passage 47 and is housed in a slide pin 31 that is movable in the axial direction, a ball 32 for holding the tool 100, and a housing chamber 49. And an elastic member 33 biased to the right side.

  The diameter of the left end portion of the slide pin 31 is larger than the diameter of the middle portion of the slide pin 31. The left end portion and the middle portion of the slide pin 31 are connected by a concave curved surface 34. The curved surface 34 is disposed at a position facing the through hole 48a. The ball 32 is provided between the curved surface 34 and the side surface of the ball chamber 48 so that a part of the ball 32 protrudes from the support portion 40 radially outward through the through hole 48a. The diameter of the through hole 48a is smaller than the diameter of the ball 32, and the ball 32 does not pass through the through hole 48a to the outside of the support portion 40.

  An annular projecting portion 35 projecting radially outward is provided at the right end of the slide pin 31. The protrusion 35 is located in the storage chamber 49, and the elastic member 33 is provided around the slide pin 31 between the protrusion 35 and the left wall surface of the storage chamber 49. The urging force of the elastic member 33 acts on the protrusion 35 and urges the slide pin 31 to the right side. Note that the right end of the slide pin 31 is pressed to the left by a drive mechanism (not shown).

  As described above, the movable body support portion 60 is fitted to the right end portion of the housing 11. The movable body 50 penetrates the movable body support portion 60 and the support portion 40 in the axial length direction and is movable in the axial length direction.

  The movable body support unit 60 includes a cylindrical large-diameter portion 61, a cylindrical small-diameter portion 62 protruding in the axial length direction from the central portion of the end surface of the large-diameter portion 61, and an annular shape provided on the tip surface of the small-diameter portion 62 Part 63. The large diameter portion 61 is fitted to the right end portion of the housing 11, and the small diameter portion 62 protrudes to the right side of the housing 11.

  The large-diameter portion 61 has a large-diameter recess 61a and a small-diameter recess 61b that accommodate a support cylinder 52 described later. The large-diameter recess 61a is formed with the right side as the bottom side. The small diameter recess 61b is formed at the bottom of the large diameter recess 61a. The bolt 64 penetrates the peripheral edge portion of the large diameter portion 61 from the right side, and connects the large diameter portion 61 and the support portion 40.

  Inside the small-diameter portion 62, a storage chamber 62a that stores a biasing member 65 that biases the moving body 50 to the left side, and a passage 62b that connects the storage chamber 62a and the small-diameter recess 61b are formed. The accommodation chamber 62 a is open at the right end surface of the small diameter portion 62. The diameter of the storage chamber 62a is larger than the diameter of the passage 62b. An annular portion 63 is provided on the right end surface of the small diameter portion 62, and the annular portion 63 and the small diameter portion 62 are connected by a bolt 66.

  Next, the configuration of the moving body 50 will be described. FIG. 3 is a perspective view schematically showing each component constituting the moving body 50. The moving body 50 abuts on the inserted tool 100 and can move in the axial direction, and a plurality of (three in this embodiment) abutment pins 51, a support column 52 that supports the contact pin 51, A retracting pin 53 that protrudes and retracts from the hole of the annular portion 63 is provided.

  The contact pin 51 includes a rod-shaped portion 51a and a disc portion 51b provided at an end of the rod-shaped portion 51a. As shown in FIG. 1, the rod-like portion 51 a is inserted into the insertion hole 46 of the support portion 40. The rod-shaped part 51 a penetrates the middle part 42 and the right part 43 of the support part 40 in the axial length direction, and protrudes from the end face of the middle part 42 of the support part 40. The disc part 51 b is locked to the right end surface of the support part 40. The contact pins 51 are equally arranged in the circumferential direction in the support portion 40 and have rotational symmetry with the axis of the tool pot 10 as the rotation axis. The position of each contact pin 51 corresponds to each triangular apex on the inner peripheral surface of the housing 11.

  The support column 52 includes a column part 52a and a disc part 52b provided at an end of the column part 52a. The disc part 52b is opposed to each of the contact pins 51 and has a larger diameter than the cylindrical part 52a. The disk portion 52b is accommodated in the large-diameter recess 61a, and the cylindrical portion 52a is accommodated in the small-diameter recess 61b.

  The protruding / extracting pin 53 is provided at the large-diameter shaft portion 53a, the end of the large-diameter shaft portion 53a, an annular projecting portion 53b projecting in the radial direction, and the opposite of the large-diameter shaft portion 53a from the projecting portion 53b. And a small-diameter shaft portion 53c protruding to the side. The large diameter shaft portion 53 a is inserted into a passage 62 b formed in the small diameter portion 62. The protrusion 53b is located in the accommodation chamber 62a. The small diameter shaft portion 53 c is located in the accommodation chamber 62 a, and the right end portion thereof is inserted into the hole of the annular portion 63. The diameter of the protrusion 53b is substantially equal to the diameter of the storage chamber 62a and is larger than the diameter of the passage 62b.

  An urging member 65 is provided around the small diameter shaft portion 53c. The urging member 65 is located between the protruding portion 53b and the annular portion 63, and urges the protruding portion 53b to the left side. That is, the urging member 65 urges the moving body 50 to the left side. When the tool 100 is not attached to the tool pot 10, the protruding portion 53 b is locked to the left wall surface by the urging force of the urging member 65. Therefore, the moving body 50 does not rattle. The moving body 50 is arranged in the tool pot 10 so that the axis of the small diameter shaft portion 53c coincides with the axis of the tool pot 10.

  FIG. 4 is a perspective view schematically showing an example of the tool 100. The tool 100 includes a processing blade 101 that processes a workpiece, a support cylinder portion 102 that supports the processing blade 101, and an insertion cylinder portion 103 that is provided in the support cylinder portion 102 and is inserted into the tool pot 10. . The processing blade 101 is attached to the left end portion of the support cylinder portion 102. The insertion tube portion 103 has a triangular shape when viewed from the axial length direction, and protrudes from the right end portion of the support tube portion 102. The triangular shape of the insertion tube portion 103 corresponds to the triangular shape on the inner peripheral surface of the housing 11. An engagement groove 103 a with which the ball 32 is engaged is provided on the inner peripheral surface of the insertion tube portion 103. A guide groove 103 b for guiding the guide pin 45 is provided on the side surface of the distal end portion of the insertion tube portion 103.

  FIG. 5 is a schematic longitudinal sectional view of the tool holder 1 when the tool 100 is inserted. The tool 100 is inserted into the left end portion of the tool pot 10 so that the guide pin 45 is inserted into the guide groove 103b. At this time, the left end portion of the holding mechanism 30 is positioned inside the insertion tube portion 103, the ball 32 is engaged with the engagement groove 103 a of the insertion tube portion 103, and the tool holder 1 holds the tool 100. In addition, each vertex of the insertion tube portion 103 having a triangular shape corresponds to each vertex of the inner peripheral surface of the housing 11 having a triangular shape, and each vertex of the insertion tube portion 103 is in contact with each of the contact pins 51.

  Each of the contact pins 51 is pressed by the insertion tube portion 103 of the tool 100, the moving body 50 moves to the right against the urging force of the urging member 65, and the distal end portion of the small diameter shaft portion 53c is an annular portion 63. Protrude from. The machine tool main body is provided with a proximity sensor (not shown) at a position facing the small diameter shaft portion 53c. The proximity sensor detects a distance from the small diameter shaft portion 53c (that is, the moving body 50). When the distance between the proximity sensor and the small diameter shaft portion 53c is less than a predetermined threshold value, it is determined that the tool holder 1 holds the tool 100, and the distance between the proximity sensor and the small diameter shaft portion 53c is a predetermined threshold value. When it is above, it determines with the tool holder 1 not holding the tool 100. FIG. Note that the difference in the distance between the proximity sensor and the small-diameter shaft portion 53c before and after inserting the tool 100 is a sufficient distance (for example, 3.3 mm) that can accurately detect the presence or absence of the tool 100 by the proximity sensor.

  A force is applied to each of the contact pins 51 from each vertex of the insertion tube portion 103 substantially evenly. Accordingly, it is possible to prevent the force from being concentrated from the insertion tube portion 103 on any one of the contact pins 51. As a result, the moving body 50 can be prevented from tilting along the direction intersecting the axial length direction.

  When the right end portion of the slide pin 31 is pressed to the left side by the drive mechanism, the slide pin 31 moves to the left side. The position of the ball 32 is changed between the curved surface 34 and the side surface of the ball chamber 48 between the middle portion of the slide pin 31 and the side surface of the ball chamber 48. That is, the ball 32 is positioned in a wider space, the amount of protrusion of the ball 32 from the through hole 48a is reduced, and the engagement between the ball 32 and the engagement groove 103a is released. The tool 100 can be detached from the tool holder 1.

  In the tool holder 1 according to the first embodiment, when the tool 100 is inserted into the left end portion of the tool pot 10, the small-diameter shaft portion 53 c of the moving body 50 has the annular portion 63 (the right end portion of the tool pot 10. ) Protrude from. Therefore, by providing a proximity sensor at a position facing the small-diameter shaft portion 53c in the machine tool body, the machine tool can accurately detect the presence or absence of the tool 100 based on the distance between the proximity sensor and the moving body 50. . Therefore, the machine tool can reliably detect the presence or absence of the tool 100 without providing a proximity sensor on the tool holder 1.

  Further, when the tool 100 is not inserted into the tool pot 10, the protrusion 53 b comes into contact with and locks against the wall surface of the storage chamber 62 a by the urging force of the urging member 65, thereby preventing the moving body 50 from rattling. be able to.

  The plurality of contact portions are equally distributed along the circumferential direction and have rotational symmetry with the axis of the tool pot 10 as the rotation axis. When the tool 100 is inserted into the tool pot 10, a force in the axial length direction acts on each contact pin 51 from each vertex of the insertion tube portion 103. Since each contact part has rotational symmetry, it is avoided that force concentrates on any one of the contact pins 51. As a result, it is possible to prevent the moving body 50 from being tilted along the direction intersecting the axial length direction, and to realize a smooth movement of the moving body 50 in the axial length direction.

  Further, the moving body 50 is arranged in the tool pot 10 so that the axis of the small diameter shaft portion 53c coincides with the axis of the tool pot 10. Therefore, the proximity sensor and the tool pot 10 can be positioned by making the axial center portion of the tool pot 10 face the proximity sensor, and the positioning can be performed intuitively.

(Embodiment 2)
Hereinafter, the present invention will be described based on the drawings showing a tool holder 1 according to a second embodiment. FIG. 6 is a schematic longitudinal sectional view of the tool holder 1 when the tool 100 is not inserted.

  The support portion 40 is provided with a plurality of insertion holes 46 penetrating in the axial direction in which the plurality of moving bodies 50 are inserted. The diameter of the right end portion of the insertion hole 46 is larger than the diameter of the other portions, and the right side portion of the insertion hole 46 forms a storage chamber 46 a for storing the biasing member 65. The right wall surface of the storage chamber 46a is open. An annular portion 57 is provided on the right end surface of the storage chamber 46a.

  The moving body 50 includes a shaft portion 55 and a protruding portion 56 that protrudes in the radial direction at a midway portion of the shaft portion 55. The left end portion of the shaft portion 55 is inserted into the insertion hole 46, and the protruding portion 56 is located in the accommodation chamber 46a. The right end portion of the shaft portion 55 is located in the accommodation chamber 46 a and is inserted into the hole of the annular portion 57. A biasing member 65 is provided around the right end portion of the shaft portion 55 in the accommodation chamber 46a. The urging member 65 is located between the protruding portion 56 and the annular portion 57, and urges the protruding portion 56 to the left side. That is, the urging member 65 urges the moving body 50 to the left side.

  FIG. 7 is a schematic longitudinal sectional view of the tool holder 1 when the tool 100 is inserted. When the tool 100 is inserted into the tool pot 10, the shaft portion 55 is pressed by the insertion tube portion 103 of the tool 100, the moving body 50 moves to the right against the urging force of the urging member 65, and the shaft portion 55. The tip of the projection protrudes from the annular portion 57. The machine tool main body is provided with a proximity sensor at a position facing the shaft portion 55. The proximity sensor detects the distance from the shaft portion 55 (that is, the moving body 50). Based on the detection value of the proximity sensor, the machine tool detects the presence or absence of the tool 100 in the tool pot 10.

  Among the configurations of the tool holder 1 according to the second embodiment, the same configurations as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 8 is a perspective view schematically showing another example of the tool. In the first and second embodiments described above, the insertion tube portion 103 of the tool 100 has a triangular shape when viewed from the axial direction, but the shape inserted into the tool pot 10 in the tool 100 is this. It is not limited to. For example, as shown in FIG. 8, the insertion tube portion 103 may be circular when viewed from the axial length direction. Even in this case, the plurality of moving bodies 50 arranged so as to have rotational symmetry can come into contact with the tool 100. Moreover, the insertion cylinder part 103 may have a square shape when viewed from the axial length direction, and the moving body 50 may be arranged at a position corresponding to the apex of the square.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

DESCRIPTION OF SYMBOLS 10 Tool pot 30 Holding mechanism 31 Slide pin 32 Ball 40 Support part 50 Moving body 51 Contact pin (contact part)
53b Projection part 55 Shaft part (contact part)
60 moving body support 65 energizing member 62a accommodation chamber 100 tool

Claims (3)

In a tool holder comprising a tool pot in which a tool is inserted into one end portion and a support portion that is arranged inside the tool pot and supports a holding mechanism that holds the tool.
A movable body penetrating the support portion and projecting from the support portion to one end of the tool pot, and movable in the axial length direction;
An urging member for urging the movable body on one end side of the tool pot;
When the moving body comes into contact with a tool inserted into one end of the tool pot, the moving body moves against the urging force of the urging member and protrudes from the other end of the tool pot. Citea to is,
The moving body is in contact with the inserted tool, the tool holder, characterized in Rukoto which having a plurality of contact portions which are equidistantly along the circumferential direction of the tool pot. In a tool holder comprising a tool pot in which a tool is inserted into one end portion and a support portion that is arranged inside the tool pot and supports a holding mechanism that holds the tool.
A movable body penetrating the support portion and projecting from the support portion to one end of the tool pot, and movable in the axial length direction;
A biasing member that biases the movable body toward one end of the tool pot;
With
When the moving body comes into contact with a tool inserted into one end of the tool pot, the moving body moves against the urging force of the urging member and protrudes from the other end of the tool pot. And
The moving body has an abutting portion that abuts on the inserted tool and is disposed at a position radially away from the axis of the tool pot.
A tool holder characterized by. A storage chamber for storing the biasing member;
The moving body has a protruding portion protruding in the radial direction of the tool pot,
The protrusion is located in the storage chamber, and when a tool is not inserted in the tool pot, the protrusion is locked to the wall surface of the storage chamber by a biasing force of the biasing member. The tool holder according to claim 1 or 2 .

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