JP2005177982A - Turning tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turning tool of excellent practicability capable of easily turning a fastening body even if a tool is long and a working space is small without needing to insert a tip part of the tool through to move to the tool holder side. <P>SOLUTION: This turning tool for the fastening body 2 in a chuck device for clamping the tool 5 by expanding/contracting the clamping body 4 mounted in the tool holder 1, by turning the fastening body 2 provided in the tool holder 1, comprises a grip part 31 provided at a base part 24; a center hole 29 provided in the base part 24, and a cutout part 27 communicating with the center hole 29, provided at the base part, in a part where there is no grip part 31. Further, one or more engaging parts 26 engaged with recessed parts or projecting parts provided at the fastening body 2 are provided around the center hole 29. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotating tool.

  A chuck apparatus as shown in FIG. 1 according to the applicant's prior application (Japanese Patent Application No. 2004-315598) has been proposed. Specifically, a clamping body 54 (collet or the like) that clamps the tool 55 is inserted into a tapered hole 53 provided at the distal end portion of the tool holding body 51, and a tightening body 52 is inserted into the concave portion 56 on the distal end side of the tapered hole 53. It is a chuck device formed by screwing. This chuck device expands and contracts the clamping body 54 by sliding the clamping body 52 in the taper hole 53, and clamps or releases the tool 55 by the expansion and contraction. Reference numeral 58 denotes a pull stud, and 59 denotes a shank portion.

  Incidentally, as a tool for fastening the fastening body 52, for example, a rotating tool 40 as shown in FIG. 2 is employed. Specifically, a gripping portion 41 is provided on both sides of a base portion 44 provided with an insertion hole 42 in the center, and the base portion 44 has a round pin 43 fitted in a round hole 57 provided in the tightening body 52. Is provided.

  The rotary tool 40 shown in FIG. 2 grips the gripping portion 41, inserts the tip end portion of the tool 55 into the insertion hole 42, and moves it to the tool holder 51 side to move the round pin 43 (engaging portion). ) Is fitted into the round hole 57 of the tightening body 52, the gripping portion 41 is gripped and the rotating tool 40 is rotated to rotate the tightening body 52.

  However, this rotating tool 40 is used to tighten the tightening body 52 after the distal end portion of the tool 55 is inserted into the insertion hole 42 and moved to the tool holder 51 side. It is inconvenient when there are few.

  Further, in order to increase the strength in order to prevent damage to the round pin 43, when the diameter of the round pin 43 is increased, the diameter of the round hole 57 must be increased accordingly. However, when the diameter of the round hole 57 is increased, there is no problem because there is sufficient thickness in the rotating direction of the fastening body 52 (between the round holes 57), but there is no problem in the radial direction of the fastening body 52. As a result, the strength of the tightening body 52 becomes insufficient as a whole (in order to make up for the strength, the tightening body 52 must have a large diameter).

  The present invention has been made in view of the current situation as described above, and it is not necessary to insert the tip of the tool and move it to the tool holder side, even if the tool is long or the work space is small. It is possible to rotate the tightening body, and it is possible to improve the strength of the engaging portion and prevent the tightening body from being lowered while suppressing the increase in diameter of the tightening body. A rotating tool is provided.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A tool for rotating the clamping body 2 in a chuck device that clamps the tool 5 by expanding and contracting the clamping body 4 provided in the tool holder 1 by rotating the clamping body 2 provided in the tool holder 1. The base 24 is provided with a gripping portion 31, and the base 24 is provided with a central hole 29. Further, the base 24 has a notch communicating with the central hole 29 at a portion where the gripping portion 31 does not exist. A portion 27 is provided, and one or a plurality of engaging portions 26 are provided around the central hole 29 to engage with a concave portion or a convex portion provided in the tightening body 2. This relates to a rotating tool.

  Further, in the turning tool according to claim 1, the engaging portion 26 is a projecting body 25 or a recess having a curved shape in a sectional view which is long in the turning direction of the tightening body 2 and short in the radial direction. It relates to a moving tool.

  Further, the clamping body 2 in the chuck device that clamps the tool 5 by expanding and contracting the clamping body 4 provided in the tool holder 1 by the rotation of the clamping body 2 provided in the tool holder 1 is used. The base 24 is provided with a gripping portion 31, and the base 24 is provided with a central hole 29. Further, around the central hole 29, a recess provided in the fastening body 2 or One or a plurality of engaging portions 26 that are engaged with the convex portions are provided. The engaging portions 26 are projections 25 or concave portions that are long in the rotational direction of the tightening body 2 and short in the radial direction in a sectional view. The present invention relates to a rotating tool characterized by that.

  Further, in the rotating tool according to any one of claims 1 to 3, on the outside of the engaging portion 26, the engaging portion 26 is brought into contact with the outer periphery 32 of the tip end portion of the tool holder 1 to be fastened. The present invention relates to a rotating tool characterized in that a positioning guide portion 28 is provided at a position where it can be engaged with two concave portions or convex portions.

  Further, in the rotating tool according to any one of claims 1 to 4, the engaging portion 26 is a projecting body 25 that substantially matches the insertion hole 17 provided in the tightening body 2. This relates to a rotating tool.

  Since the present invention is configured as described above, it is not necessary to insert the tip of the tool and move it to the side of the tool holder. Even if the tool is long or the work space is small, the fastening body can be easily attached. It is a rotating tool with excellent practicality that can be rotated.

  An embodiment of the present invention considered to be suitable will be briefly described with reference to the drawings, showing its effects.

  Since the base 24 is provided with a notch 27 that communicates with the central hole 29, when the fastening body 2 of the chuck device is rotated, the tool 5 is inserted into the central hole 29 from the side surface of the base 24 via the notch 27. It is not necessary to insert the tip of the tool 55 into the insertion hole 42 and move it to the tool holder 51 side as in the rotating tool 40 of FIG. It can be engaged with the tightening body 2.

  Further, for example, by making the engaging portion 26 a projecting body 25 having a curved sectional shape that is long in the rotational direction of the fastening body 2 and short in the radial direction, the recess of the fastening body 2 is also set to the curved shape in the sectional view. Therefore, the radial thickness of the fastening body 2 is not small, and the strength of the fastening body 2 is not reduced.

  Specific embodiments of the present invention will be described with reference to the drawings. The first embodiment is based on FIGS. 3 to 7, the second embodiment is based on FIGS. 8 and 9, the third embodiment is based on FIGS. 10 and 11, and the fourth embodiment is FIGS. The fifth embodiment will be described with reference to FIGS. 14 and 15, respectively.

  In the first embodiment, the clamping body 2 in the chuck device for clamping the tool 5 by expanding and contracting the clamping body 4 provided in the tool holder 1 by rotating the clamping body 2 provided in the tool holder 1 is used. It is a turning tool for turning.

  The chuck device is as shown in FIGS. 5 and 6 and will be described below.

  The tool holder 1 has a through inner hole 21, and a concave portion 22 for providing a fastening body 2 is provided at a tip portion of the through inner hole 21. Further, a shank portion 13 is provided at the base end portion of the tool holder 1, and the tool of the tool 5 is in contact with the base end portion of the tool 5 in the vicinity of the central portion of the through-hole 21. A protrusion amount setting portion 12 for appropriately determining the protrusion amount from the holding body 1 is screwed, and a pull stud 14 is screwed to the base end portion of the through-hole 21.

  Further, between the concave portion 22 and the protrusion amount setting portion 12 of the through-hole 21 of the tool holder 1, the tip opening side is set to a tapered hole 3 having a large diameter, and the tapered hole 3 has a tip side on the tip side. A cylindrical sandwiching body 4 having a large diameter is inserted.

  The sandwiching body 4 is a known collet in which slits 8 are arranged in parallel at a predetermined interval in the radial circumferential direction. The holding body 4 can be reduced in diameter by the presence of the slit 8, and is configured to hold the tool 5 on the inner surface of the holding body 4 when the diameter is reduced.

  The slits 8 are alternately positioned so that the slits 8 extending from the distal opening side of the cylindrical sandwiching body 4 to the proximal opening side and the slits 8 extending from the proximal opening side to the distal opening side are alternately positioned. It is provided to do.

  In addition, a hole 11 is provided at the opposite end of the opening of the sandwiching body 4 as the slit 8. Accordingly, the space between the slits 8 (symbol 19 in the figure) of the sandwiching body 4 is narrow in the vicinity of the hole 11 and can be flexed well inwardly. The sandwiching action of the tool 5 by the sandwiching body 4 is as follows. Good performance.

  Further, a concave groove 9 is provided around the outer peripheral surface on the front end side of the sandwiching body 4 at a position exposed from the front end of the tapered hole 3.

  In addition, a tapered surface 20 having a diameter gradually decreasing toward the distal end side is provided on the outer peripheral surface of the sandwiching body 4 on the distal end side from the concave groove 9.

  The tightening body 2 is inserted into a recess 22 provided on the distal end side of the tool holder 1.

  The fastening body 2 is provided with a hole 2a through which the tool 5 is inserted in the center, and a male screw portion 7 that is screwed with the female screw portion 6 on the outer peripheral surface.

  An inner surface proximal end of the tightening body 2 is set to an insertion convex portion 10 to be inserted into the concave groove 9 of the clamping body 4.

  Further, a pressing portion 18 is provided at the central portion of the inner surface of the tightening body 2 so as to contact the tapered surface 20 of the holding body 4 and push the holding body 4 toward the base end side of the tool holder 1. ing.

  Further, the distal end of the tightening body 2 slightly protrudes from the tool holder 1, and a seal ring 16 is provided on the inner surface of the hole 2a to prevent dust from entering the through hole 21. It has been.

  As shown in FIG. 7, the fastening body 2 may have its distal end surface flush with the distal end surface of the tool holder 1 and the distal end surface of the clamping body 4. The holding body 1 can be made compact so much, and the length of the tool 5 can be shortened, so that the workability is excellent. Except for this point, the configuration of the chuck device of FIG. 7 is the same as that of the chuck device of FIGS.

  When the tightening body 2 configured as described above is rotated, the tightening body 2 moves to the proximal end side or the distal end side of the tool holder 1.

  When the fastening body 2 is rotated and moved to the proximal end side of the tool holder 1, the pushing portion 18 of the fastening body 2 pushes the tapered surface 20 of the holding body 4. Then, when the tapered surface 20 is pushed, the holding body 4 is pushed and pushed into the tapered hole 3, the diameter of the holding body 4 is reduced by the taper action of the tapered hole 3, and the tool 5. Demonstrates the effect of pinching. Further, when the tapered surface 20 of the sandwiching body 4 is pushed by the pushing portion 18, the sandwiching body 4 is also reduced in diameter by the taper action of the tapered surface 20, and exhibits the action of sandwiching the tool 5.

  When the clamping body 2 is rotated and moved to the tip side of the tool holder 1, the contact between the pushing portion 18 of the clamping body 2 and the tapered surface 20 of the clamping body 4 is released, and The insertion convex portion 10 of the fastening body 2 and the concave groove 9 of the sandwiching body 4 are locked, and the sandwiching body 4 is pulled by the insertion convex portion 10, whereby the sandwiched body 4 having the diameter reduced. When the clamping of the tool 5 is released and the clamping body 2 is further rotated, the clamping body 2 is detached from the recess 22 of the tool holder 1 together with the clamping body 4.

  Reference numeral 17 in the figure denotes insertion holes for a rotating tool for rotating the tightening body 2, and four holes are provided at intervals of 90 °. Further, as shown in FIG. 6, the insertion hole 17 is set in a curved elliptical shape that is long in the rotational direction of the fastening body 2 and short in the radial direction. In this case, compared to the case where the cross-sectional view is set to a substantially circular shape (round hole), the radial thickness of the tightening body 2 does not decrease that much, so that sufficient strength can be obtained even if the diameter of the tightening body 2 is reduced. Thus, the diameter of the apparatus can be reduced (downsized). It should be noted that the insertion holes 17 of the tightening body 2 may have other arrangements such as two provided at intervals of 180 °.

  The turning tool of the first embodiment will be specifically described.

  The first embodiment is a rotating tool for rotating the fastening body 2 of the chuck device having the above-described configuration. As shown in FIGS. 3 and 4, the base 24 is provided with a gripping portion 31, and The base 24 is provided with a central hole 29, and the base 24 is provided with a notch 27 communicating with the central hole 29 at a portion where the gripping portion 31 does not exist. The base 24 is provided with a plurality of engaging portions 26 that engage with recesses provided in the fastening body 2.

  Specifically, gripping portions 31 are provided at opposite positions on both sides of the base portion 24 provided with the central hole 29. The gripping portion 31 may be configured to be provided on one side of the base portion 24 instead of on both sides of the base portion 24.

  The central hole 29 is set to have a diameter through which the tool 5 is inserted.

  Further, a cutout portion 27 that communicates with the central hole 29 is provided in a direction orthogonal to the extending direction of the gripping portion 31. The cutout 27 may be provided so as to be parallel to the extending direction of the gripping portion 31 as long as the gripping portion 31 does not exist.

  In addition, a pair of engaging portions 26 are provided around the central hole 29 as the base portion 24 at intervals corresponding to the insertion holes 17. Specifically, two are provided at intervals of 180 °. Four engaging portions 26 may be provided at intervals of 90 °, or may be configured such that one or three are not opposed to each other, but the arrangement is the same as the insertion hole 17 of the tightening body 2. preferable.

  The engaging portion 26 is set to a projecting body 25 that substantially matches the insertion hole 17 provided in the tightening body 2. Specifically, like the insertion hole 17, the engaging portion 26 is a projecting ellipse 25 having a curved elliptical shape that is long in the rotational direction of the fastening body 2 and short in the radial direction.

  Further, on the outer side of the engaging portion 26 as the base portion 24, the tool holder 1 is brought into contact with the outer periphery 32 of the distal end portion so that the engaging portion 26 can be engaged with the insertion hole 17 of the tightening body 2. A positioning guide portion 28 is provided.

  Specifically, the positioning guide portion 28 is set to have substantially the same curved shape as the outer periphery 32 of the tip end of the tool holder 1 so that the inner surface thereof is just fitted on the outer periphery 32 of the tip end of the tool holder 1. Yes. Further, the positioning guide portion 28 is configured to be in an appropriate position where the protrusion 25 is fitted into the insertion hole 17 when it comes into contact with the outer periphery 32 of the tip end portion of the tool holder 1.

  Since the first embodiment is configured as described above, the tool 5 can be positioned in the central hole 29 from the side surface of the base 24 through the notch 27, and is inserted into the insertion hole 42 like the rotating tool 40 of FIG. There is no need to insert the tip of the tool 55 and move it to the tool holder 51 side. Further, in the first embodiment, when the inner periphery of the positioning guide portion 28 is brought into contact with the outer periphery 32 of the tip end portion of the tool holder 1 and pushed while rotating as it is, the protrusion 25 is fitted into the insertion hole 17. Therefore, even when the insertion hole 17 is not visible, the protrusion 25 can be quickly inserted into the insertion hole 17.

  In addition, since the engaging portion 26 is a protrusion 25 having a curved elliptical shape in cross-sectional view that is long in the rotational direction of the tightening body 2 and short in the radial direction, sufficient strength is exhibited in the rotational direction in which the load acts. The

  Further, since the concave portion of the tightening body 2 is set to have the curved elliptical shape in cross-section, the radial thickness of the tightening body 2 is not much reduced, and the strength of the tightening body 2 is not reduced (tightening). The body 2 may not have a large diameter.)

  Therefore, in this embodiment, it is not necessary to insert the tip of the tool and move it to the side of the tool holder, and even if the tool is long or the work space is small, the tightening body can be easily rotated. In addition, the rotating tool is excellent in practicality and can improve the strength of the engaging portion and prevent the strength of the tightening body from being reduced while suppressing an increase in the diameter of the tightening body.

  Another embodiment will be described.

  The second embodiment shown in FIGS. 8 and 9 has a configuration in which the gripping portion 31 of the first embodiment is provided only on one side of the base portion 24 (the rest is the same as the first embodiment).

  In the third embodiment shown in FIGS. 10 and 11, as in the second embodiment, the grip portion 31 is provided only on one side of the base 24, and the notch 27 is further extended from the grip portion 31. This is a configuration provided in a direction parallel to the direction (the rest is the same as in the first embodiment).

  In the fourth embodiment shown in FIGS. 12 and 13, as in the second and third embodiments, the grip portion 31 is provided only on one side of the base portion 24, and the guide portion 28 further includes the grip portion 31. This is a configuration provided only on the existing base end side (the rest is the same as in the first embodiment).

  As in the second, third, and fourth embodiments, the type in which the gripping portion 31 is provided on one side of the base portion 24, while inserting the projection 25 into the insertion hole 17, while holding the tool 5 with one hand, The rotating tool can be operated and inserted with the other hand, so that it is excellent in workability.

  By the way, in the configuration in which a plurality of positioning guide portions 28 are provided as in the second embodiment illustrated in FIGS. 8 and 9 and the third embodiment illustrated in FIGS. 10 and 11, while holding the tool 5 with one hand, the other After the tool 5 is positioned in the central hole 29 of the base 24 of the rotating tool held by the hand, the positioning guide 28 of the rotating tool is brought into contact with the outer periphery 32 of the tip end of the tool holder 1. The plurality of guide portions 28 need to be fitted and brought into contact with the outer periphery 32 of the tip end portion of the tool holder 1 from below the tool holder 1.

  Further, when the tool 5 is long, the hand holding the tool 5 can be positioned below the rotating tool. However, when the tool 5 is short, the hand holding the tool 5 is connected to the tool holder 1. Since it must be positioned between the rotating tools (parts very close to the tool holder 1), in the configuration in which a plurality of positioning guide portions 28 are provided, the interval between the positioning guide portions 28 is narrow, and therefore the positioning guides When the portion 28 is fitted on the outer periphery 32 of the tip end portion of the tool holder 1, the positioning guide portion 28 and the hand holding the tool 5 are likely to interfere with each other.

  On the other hand, in the fourth embodiment, the positioning guide portion 28 is provided only in the connecting portion 33 between the base portion 24 and the gripping portion 31, and after the tool 5 is positioned in the central hole 29 of the base portion 24, The projecting body 25 can be brought into an appropriate position by simply pressing the inner surface of the positioning guide portion 28 having a curved shape substantially the same as the distal end outer peripheral portion 32 against the outer peripheral portion 32 of the tool holder 1 from the side. Even if the tool 5 is short and the hand holding the tool 5 must be positioned between the tool holder 1 and the rotating tool, the positioning guide portion 28 is formed between the base portion 24 and the gripping portion 31. Since it is provided only on the connecting portion 33, that is, only on the gripping portion 31 side that does not easily interfere with the hand holding the tool 5 when the positioning guide portion 28 is brought into contact with the outer periphery 32 of the tip end portion of the tool holder 1. Therefore, it is less likely to interfere with the hand holding the tool 5, and the workability is further improved.

  The other effects are the same as in the first embodiment.

  Moreover, it is good also as a structure which does not provide the notch 27 like the 5th Example illustrated in FIG. Specifically, as shown in FIGS. 14 and 15, gripping portions 31 are provided on both sides of the base portion 24, and a central hole 29 is provided in the base portion 24. The base 24 is provided with four engaging portions 26 that engage with the recesses provided in the fastening body 2 at intervals of 90 °, and the engaging portions 26 are elongated in the rotational direction of the fastening body 2. A configuration may be adopted in which the protrusion 25 has a curved elliptical shape that is short in the radial direction. In the fifth embodiment, the central hole 29 is fitted from the tip end side of the tool 5 in the same manner as the rotating tool 40 in FIG. 2, and the rest is the same as in the first embodiment.

It is a description sectional side view of the chuck apparatus of Japanese Patent Application No. 2004-315598. It is a schematic explanatory perspective view of a turning tool same as the above. It is a schematic explanatory perspective view of the first embodiment. It is a schematic explanatory rear view of the first embodiment. It is a description sectional side view of the chuck apparatus of a present Example. It is a schematic explanatory plan view of a fastening body. It is explanatory side sectional drawing of the chuck apparatus of another example. It is a schematic explanatory perspective view of the second embodiment. It is a schematic explanatory rear view of the second embodiment. It is a schematic explanatory perspective view of a third embodiment. It is a schematic explanatory rear view of a third embodiment. It is a schematic explanatory perspective view of the fourth embodiment. It is a schematic explanatory rear view of a fourth embodiment. It is a schematic explanatory perspective view of the fifth embodiment. It is a schematic explanatory rear view of 5th Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tool holder 2 Clamping body 4 Clamping body 5 Tool
17 Insertion hole
24 base
25 Projection
26 Engagement part
27 Notch
28 Guide section
29 Central hole
31 Grip part
32 Tip circumference

Claims (5)

  A rotating tool for the clamping body in a chuck device for clamping a tool by expanding and contracting a clamping body provided in the tool holding body by rotation of a clamping body provided on the tool holding body, The base is provided with a central hole, and the base is provided with a notch that communicates with the central hole at a portion where the gripping part does not exist. A rotating tool characterized in that one or a plurality of engaging portions that engage with a concave portion or a convex portion provided in the tightening body are provided.   2. The rotating tool according to claim 1, wherein the engaging portion is a protrusion or a recess having a curved cross-sectional view that is long in the rotating direction of the tightening body and short in the radial direction.   A rotating tool for the clamping body in a chuck device for clamping a tool by expanding and contracting a clamping body provided in the tool holding body by rotating a clamping body provided in the tool holding body, A central hole is provided in the base, and one or a plurality of engaging portions that engage with a concave portion or a convex portion provided in the fastening body are provided around the central hole. The rotating tool is characterized in that the engaging portion is a protrusion or recess having a curved cross-sectional view that is long in the rotating direction of the fastening body and short in the radial direction.   The rotating tool according to any one of claims 1 to 3, wherein an outer side of the engaging portion is brought into contact with an outer periphery of a tip end portion of the tool holder so that the engaging portion is formed into a concave portion or a convex portion of the tightening body. A rotating tool, characterized in that a positioning guide portion disposed at a position where it can be engaged is provided. 5. The rotating tool according to claim 1, wherein the engaging portion is a projecting body that substantially matches an insertion hole provided in the tightening body.

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