Adapter, adapter for mounting member, and one-way clutch mechanism

Abstract

To provide an adapter and a one-way clutch mechanism that can expand compatibility. [Solution] The adapter (30) is attached to the one-way clutch member (10) to hold the tool holder (4) or the mounting member (45) when chucking or unchucking the mounting member (45) to the tool holder (4). The adapter (30) is attached to the inner diameter side of the cylindrical portion (17) of the one-way clutch member (10), and can hold a tool holder shank portion (41) of a different size than the tool holder (4), or a mounting member of a different size than the mounting member attached to the one-way clutch member (10).

Description

[Technical Field]

[0001] The present invention relates to an adapter and a one-way clutch mechanism, and more particularly to an adapter and a one-way clutch mechanism for holding a tool holder against rotation when chucking or unchucking a cutting tool into or from the tool holder. [Background technology]

[0002] Generally, when chucking or unchucking a cutting tool to or from a tool holder, a tool clamper, a wrench, etc. are used to fix the tool holder. Known documents disclosing such techniques include, for example, Japanese Patent Laid-Open No. 2004-58164 (Patent Document 1) and Japanese Patent Laid-Open No. 2004-42156 (Patent Document 2).

[0003] Patent Document 1 discloses a tool clamper for preventing a tool holder from rotating when a cutting tool such as an end mill is attached to or replaced in the tool holder. The tool clamper in Patent Document 1 is a one-way clutch type with multiple wedge members arranged in the circumferential direction, and discloses that by operating a switching lever, the wedge members are caused to bite into the flange portion of the tool holder, thereby clamping the tool holder.

[0004] Furthermore, Patent Document 2 discloses a one-way clutch type wrench. The wrench in Patent Document 2 is disclosed to be used for tightening and loosening fastening members such as bolts, nuts, and clamping sleeves of tool holders. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-58164 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-42156 Summary of the Invention [Problem to be solved by the invention]

[0006] There are various standards for tool shanks of tool holders, such as the BT standard, IT standard, and HSK standard. Even within a single standard, there are various sizes, such as BT50, BT40, and BT30. There are also various sizes of attachment members, such as pull studs, for attaching to tool holders. However, the tool clampers disclosed in Patent Documents 1 and 2 can only grip tool holders and attachment members of a certain size. Therefore, when using tool holders of different standards or tool holders of the same standard but different sizes, it is necessary to prepare multiple types of tool clampers and one-way clutch mechanisms, such as wrenches.

[0007] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an adapter and a one-way clutch mechanism that can expand compatibility. [Means for solving the problem]

[0008] For this purpose, one aspect of the present invention provides an adapter that is attached to a one-way clutch member for holding either a tool holder or a mounting member when chucking or unchucking the mounting member to the tool holder, and the adapter is attached to the inner diameter side of the cylindrical portion of the one-way clutch member and can hold a shank portion of a tool holder of a different size than the tool holder attached to the one-way clutch member, or a mounting member of a different size than the mounting member attached to the one-way clutch member.

[0009] Preferably, the one-way clutch member is a one-way clutch type tool clamper, the mounting member is a cutting tool that is chucked or unchucked into the tool holder, and the adapter is capable of holding shank portions of tool holders of different sizes.

[0010] Preferably, the adapter comprises an outer cylindrical portion that abuts against the cylindrical portion of the one-way clutch member and an inner cylindrical portion that abuts against a tool holder of a different size, the inner cylindrical portion being made of a soft material and the outer cylindrical portion being made of a hard material.

[0011] Preferably, the outer cylindrical portion includes a pair of projections that protrude upward and are insertable into a pair of keyways that are provided at positions 180° symmetrical to tool holders of different sizes.

[0012] Preferably, the one-way clutch member is a one-way clutch type handle, the attachment member that is chucked or unchucked to the tool holder is a pull stud, and the adapter is attached to the inner diameter side of the cylindrical portion of the one-way clutch member and can hold attachment members of different sizes.

[0013] A one-way clutch mechanism according to another aspect of the present invention is a one-way clutch mechanism for holding a tool holder or a mounting member when chucking or unchucking the mounting member to or from the tool holder, and comprises a one-way clutch member including a cylindrical portion into which the shank portion of the tool holder or the mounting member is inserted and held, and an adapter attached to the inner diameter side of the cylindrical portion of the one-way clutch member and for holding the shank portion of the tool holder of a different size than the tool holder or the mounting member of a different size than the mounting member.

[0014] The adapter and one-way clutch mechanism of the present invention can expand compatibility. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an exploded perspective view showing a one-way clutch mechanism according to a first embodiment of the present invention. [Figure 2] 2A and 2B are views showing a part of a tool clamper body, in which (A) is a plan view and (B) is a cross-sectional view taken along line IIb-IIb in FIG. 2A. [Figure 3]FIG. 10 is an enlarged cross-sectional view showing the relationship between a wedge portion of a tool clamper body and a retainer. [Figure 4] 5(A) and 5(B) are enlarged cross-sectional views showing the relationship between the wedge member and the retainer. [Figure 5] 5A and 5B are views showing the adapter taken out, in which (A) is a perspective view, (B) is a plan view, and (C) is a cross-sectional view taken along line VV in FIG. 5B. [Figure 6] 1 is a cross-sectional view showing a one-way clutch mechanism according to an embodiment of the present invention. [Figure 7] 5A and 5B are enlarged cross-sectional views showing the relationship between the cylindrical portion of the tool clamper, the adapter, and the tool holder. [Figure 8] FIG. 10 is an exploded perspective view showing a one-way clutch mechanism according to a second embodiment of the present invention. [Figure 9] 9A and 9B are views showing the adapter taken out, in which (A) is a perspective view, (B) is a plan view, and (C) is a cross-sectional view taken along line IX-IX in FIG. 9B. [Figure 10] (A) is a side view of the pull stud, and (B) is a cross-sectional view of the pull stud with the adapter attached. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which like reference numerals denote like or corresponding parts and will not be described repeatedly.

[0017] (Embodiment 1) A one-way clutch mechanism 1 according to a first embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a perspective view showing the one-way clutch mechanism 1. The one-way clutch mechanism 1 is used to prevent the tool holder 4 from rotating when a cutting tool 45 serving as an attachment member is chucked or unchucked from the tool holder 4.

[0018] The one-way clutch mechanism 1 shown in FIG. 1 generally comprises a one-way clutch member 10 and an adapter 30 attached to the inner diameter side of a cylindrical portion 17 of the one-way clutch member 10. The one-way clutch member 10 is a one-way clutch type tool clamper. The adapter 30 is detachably attached to the tool clamper 10, and an adapter of any size can be used depending on the specifications or size of the tool holder 4. Prior to describing the tool clamper 10 and the adapter 30, the tool holder 4 held by the one-way clutch mechanism 1 will be described.

[0019] 1, a tool holder 4 according to this embodiment is used to chuck a cutting tool 45, such as an end mill or a drill, and is attached to the spindle of a machine tool. The tool holder 4 includes a shank portion 41, a V-shaped flange portion 42 having a V-groove provided on the upper end side of the shank portion 41, and a chuck portion 43 located above the flange portion 42 and configured to receive and grip the shank portion of the cutting tool 45 along the axial direction. The tool holder 4 also has a through-hole (not shown) that communicates from the rear end to the front end along the axial direction.

[0020] The shank portion 41 is a portion that is attached to the spindle of a machine tool. The shank portion 41 extends along the axis from the flange portion 42 toward the lower end. The outer circumferential surface of the shank portion 41 is a tapered surface whose diameter decreases as it extends from the flange portion 42 toward the lower end.

[0021] The flange portion 42 is the portion that is gripped when replacing the cutting tool 45, and is provided with a V-groove for gripping. The flange portion 42 is the portion of the tool holder 4 that protrudes most outward, and protrudes radially outward beyond the shank portion 41 and the chuck portion 43. The flange portion 42 is provided with a drive keyway 44 (hereinafter referred to as the keyway 44) that engages with a key provided on the spindle of the machine tool. The keyway 44 in this embodiment has a shape that opens downward in the axial direction (toward the shank portion 41). Although not shown, it is preferable that a pair of keyways 44 be provided at positions approximately 180° apart in the circumferential direction.

[0022] The chuck portion 43 can be rotated clockwise to reduce its diameter, thereby chucking the shaft portion of the cutting tool 45 inserted into the chuck portion 43. The cutting tool 45 gripped by the chuck portion 43 can be unchucked by rotating the chuck portion 43 counterclockwise.

[0023] There are various standards for such tool holders 4, such as the BT standard, the IT standard, and the HSK standard. Even within one standard, for example, the BT standard has various sizes, such as BT50, BT40, and BT30, and the outer diameter dimensions of the shank portion 41 and the flange portion 42 are different.

[0024] Next, the configuration of the tool clamper 10 constituting the one-way clutch mechanism 1 according to this embodiment will be described with reference to Figures 2 to 4. Figure 2 shows the tool clamper body, with (A) being a plan view and (B) being a cross-sectional view taken along line IIb-IIb in Figure 2(A). Figure 3 is an enlarged cross-sectional view showing the relationship between the wedge portion of the tool clamper body and the retainer. Figures 4(A) and 4(B) are enlarged cross-sectional views showing the relationship between the wedge member and the retainer.

[0025] As shown in FIG. 1, the tool clamper 10 is used to prevent the tool holder 4 from rotating when chucking or unchucking a cutting tool 45 into or from the tool holder 4. The tool clamper 10 is a one-way clutch type tool holding mechanism that transmits torque when rotated in one direction and rotates freely in the opposite direction. The tool clamper 10 is basically designed to hold a fixed size or standard of the tool holder 4, and cannot hold tool holders of multiple standards or sizes. This is because the tool clamper 10 of this embodiment holds the outer diameter side of the flange portion 42 of the tool holder 4, and the flange portion 42 of the tool holder 4 varies depending on the standard and size.

[0026] Therefore, in the one-way clutch mechanism 1 of this embodiment, the adapter 30 is used when a tool holder 4 smaller than the target tool holder 4A is used instead of the target tool holder 4A. In the following explanation, the tool clamper 10 will be described when the adapter 30 is not used. For better understanding, the target tool holder held by the tool clamper 10 will be referred to as 4A, and the non-target tool holder will be referred to as 4.

[0027] The tool clamper 10 includes a base 11 and a tool clamper body 15 fixed onto the base 11. The base 11 has a cylindrical base body 12 and a flange 13 provided at the upper end of the base body 12. The base body 12 is a part that is fixed to a workbench or the like, and a plate-like member may be disposed between the lower end of the base 11 and the workbench. The flange 13 is generally ring-shaped. Mounting pins 14 that protrude upward are provided on the flange 13 at predetermined intervals around the periphery. The mounting pins 14 allow the base 11 to be fixed to the tool clamper body 15.

[0028] As shown in the figure, the tool clamper body 15 includes a pedestal portion 16 and a cylindrical portion 17 provided on the pedestal portion 16. The pedestal portion 16 is cylindrical and is fixed to the flange portion 13 of the base 11 by the above-mentioned mounting pin 14.

[0029] 2(A) and 2(B), the cylindrical portion 17 is cylindrical like the base portion 16, and includes a wedge member 18, a retainer 20, a wedge guide groove 21, and an operating portion 19. The cylindrical portion 17 is the portion into which the shank portion 41A of the tool holder 4A is inserted, and the outer diameter of the flange portion 42A of the tool holder 4A is held by the inner diameter of the cylindrical portion 17. Therefore, the inner diameter of the cylindrical portion 17 is set slightly larger than the outer diameter of the flange portion 42A of the tool holder 4A so that the flange portion 42A of the tool holder 4A can be inserted therein.

[0030] The wedge member 18 has, for example, a roller shape, and more specifically, a cylindrical shape. When the flange portion 42A of the tool holder 4A is inserted into the inner diameter side of the cylindrical portion 17 and a rotational torque is applied to the tool holder 4A, the wedge member 18 is caused to bite into the gap between the inner peripheral surface of the cylindrical portion 17 and the cylindrical outer peripheral surface of the flange portion 42A, thereby connecting the two.

[0031] As shown in FIG. 3 , the retainer 20 is provided inside the cylindrical portion 17 to hold the wedge members 18 at equal intervals along the tapered inner peripheral surface of the cylindrical portion 17 and is rotatable around the inner circumference of the cylindrical portion 17. The retainer 20 has a cylindrical shape corresponding to the outer peripheral shape of the flange portion 42A of the tool holder 4A, and the wall thickness of the retainer 20 is smaller than the diameter of the roller-shaped wedge members 18. The retainer 20 also has elongated holes parallel to the axis of the retainer 20 formed at appropriate intervals around the periphery of the retainer 20 to accommodate the wedge members 18, and the wedge members 18 are supported in the elongated holes so that they can rotate about their axes. As shown in FIGS. 2(A) and 2(B) , a ring-shaped cover 22 is provided to prevent the wedge members 18 and the retainer 20 from jumping out of the cylindrical portion 17.

[0032] The wedge guide grooves 21 are intended to hold the wedge members 18 in a free state between themselves and the cylindrical outer peripheral surface of the flange portion 42A of the tool holder 4A, and to hold the wedge members 18 in a wedged state between themselves and the cylindrical outer peripheral surface of the flange portion 42A of the tool holder 4A. The wedge guide grooves 21 are formed on the inner peripheral surface of the cylindrical portion 17 along the circumferential direction of the cylindrical portion 17, corresponding to the arrangement intervals of the wedge members 18. As shown in FIGS. 4(A) and 4(B), the circumferential center portion of the wedge guide groove 21 forms an play region A1 that holds the wedge members 18 in a free state between themselves and the cylindrical outer peripheral surface of the flange portion 42A of the tool holder 4A, and both circumferential end portions form wedge regions A2 that hold the wedge members 18 in a wedged state between themselves and the cylindrical outer peripheral surface of the flange portion 42A.

[0033] 2(A) and 2(B) is a switching means for operating the retainer 20 so that the wedge member 18 can be switched to a position facing either the play area A1 of the wedge guide groove 21 or the wedge areas A2 at both circumferential ends. By operating the operating unit 19, the retainer 20 moves, and the wedge member 18 can be operated to a position facing the play area A1 (FIG. 4(A)) or a position facing the wedge area A2 (FIG. 4(B)).

[0034] To chuck the cutting tool 45A in the tool holder 4A, the base body 12 of the tool clamper 10 is fixed to a workbench or the like, and the operating part 19 is operated to hold each wedge member 18 held in the retainer 20 in a free state, facing the play area A1 of the wedge guide groove 21, as shown in Figure 4(A). After inserting the flange portion 42A of the tool holder 4A into the cylindrical part 17 of the tool clamper body 15 in this state, the operating part 19 is operated to hold each wedge member 18 held in the retainer 20 in a free state, facing the wedge area A2 on the left side of the wedge guide groove 21.

[0035] Next, the shank of cutting tool 45A is inserted into tool holder 4A, and chuck portion 43A is rotated clockwise. When rotated clockwise as indicated by the arrow in FIG. 4(B), each wedge member 18 bites into the gap between the wall surface of left wedge region A2 and the outer peripheral surface of shank portion 41. This integrates tool clamper body 15 and flange portion 42A of tool holder 4A, so that tool holder 4A is clamped to cylindrical portion 17 of tool clamper 10. In this clamped state, by manually rotating chuck portion 43A (FIG. 1) clockwise, the diameter of chuck portion 43A is reduced, and the shank of cutting tool 45 inserted into chuck portion 43A is chucked.

[0036] Furthermore, when removing the tool holder 4A with the cutting tool 45A attached from the tool clamper 10, the entire tool holder 4A can be slightly rotated in the direction opposite to the arrow in Figure 4(B) to release the engagement between the wall surface of the wedge region A2 of the wedge member 18 and the outer circumferential surface of the flange portion 42A of the tool holder 4A. This allows the tool holder 4A to be easily removed from the tool clamper 10.

[0037] The above has described a method for holding the tool holder 4A directly on the cylindrical portion 17 of the tool clamper 10, but the tool clamper 10 can only hold the corresponding tool holder 4A, and therefore cannot hold a tool holder 4 smaller than the tool holder 4A. In such cases, the adapter 30 of this embodiment is used.

[0038] The adapter 30 will be described with reference to Fig. 1 and Figs. 5 to 7. Fig. 5 shows the adapter removed, with (A) being a perspective view, (B) being a plan view, and (C) being a cross-sectional view taken along line VV in Fig. 5(B). Fig. 6 is a cross-sectional view showing the tool clamper mechanism. Fig. 7 is an enlarged cross-sectional view showing the relationship between the cylindrical portion of the tool clamper, the adapter, and the tool holder. By using the adapter 30 of this embodiment, it can be used with a tool holder 4 that is smaller in size than the tool holder 4A that is directly held by the tool clamper 10.

[0039] The adapter 30 is attached to the inner diameter side of the cylindrical portion 17 of the tool clamper 10 and is a member capable of directly holding the tool holder 4. Since the adapter 30 is inserted into the cylindrical portion 17 of the tool clamper 10, the outer diameter dimension of the adapter 30 is smaller than the inner diameter dimension of the cylindrical portion 17. Furthermore, as shown in FIG. 6 , an inner diameter protrusion 16a, whose inner diameter dimension is smaller than the outer diameter dimension of the adapter 30, is provided on the inner diameter side of the tool clamper body 15. As a result, by placing the adapter 30 inside the cylindrical portion 17, the adapter 30 abuts on the inner diameter protrusion 16a provided on the inner diameter side of the cylindrical portion 17, and is placed on the tool clamper body 15. The axial dimension (height) of the adapter 30 and the axial dimension (height) from the inner diameter protrusion 16a to the upper end of the cylindrical portion 17 are approximately the same, and it is preferable that the upper end of the cylindrical portion 17 and the upper end of the adapter 30 are approximately flush with each other.

[0040] As shown in FIG. 5, the adapter 30 includes an outer cylindrical portion 31 that contacts the cylindrical portion 17 of the tool clamper 10, and an inner cylindrical portion 33 that contacts the tool holder 4. The outer cylindrical portion 31 and the inner cylindrical portion 33 have a two-layer structure and are made of different materials. The outer cylindrical portion 31 is the portion that directly contacts the wedge member 18 of the tool clamper 10, and is therefore preferably made of a hard material to prevent deformation. Specifically, the outer cylindrical portion 31 is made of a hardened steel material or the like. In FIGS. 1, 5 to 7, the inner cylindrical portion 33 is indicated by light ink.

[0041] The inner cylindrical portion 33 is preferably formed of a soft material because it abuts against the boundary between the shank portion 41 and flange portion 42 of the tool holder 4. This is to prevent scratches and the like from occurring at the boundary between the shank portion 41 and flange portion 42 of the tool holder 4, which is attached to the machine spindle and is a delicate area. Specifically, the inner cylindrical portion 33 is formed of, for example, aluminum or synthetic resin. As shown in FIGS. 6 and 7, the lower end of the flange portion 42 of the tool holder 4 abuts against the upper ends of the outer cylindrical portion 31 and inner cylindrical portion 33 of the adapter 30. It is preferable that the inner diameter dimensions of the inner cylindrical portion 33 and the outer cylindrical portion 31 are approximately the same.

[0042] 5(A) and 5(B), the outer cylindrical portion 31 includes a pair of protrusions 32 at positions 180° symmetrical to each other. The pair of protrusions 32 can be inserted into a pair of key grooves 44 provided at positions 180° symmetrical to each other on the tool holder 4. As shown in FIG. 6, the pair of protrusions 32 are fitted into the pair of key grooves 44, thereby preventing the tool holder 4 from rotating.

[0043] 6 and 7, a description will be given of how to use the adapter 30. The adapter 30 is used when holding a tool holder 4 that is smaller in size than the tool holder 4A that the tool clamper 10 can directly hold.

[0044] For example, even for the same #50 size, the flange outer diameter dimensions are different between the BT standard and the IT standard, so the same tool clamper 10 cannot be used. If the tool clamper 10 is designed to hold a #50 size (BT50: φ100) in the BT standard, it cannot hold an IT50 because the #50 size (IT50: φ97.5) in the IT standard is smaller than a BT50. In such a case, by using the adapter 30 according to this embodiment, even a tool clamper 10 designed for a BT50 can hold an IT50.

[0045] To make the tool clamper 10, which is designed to hold the tool holder 4A of the BT50, hold the tool holder 4 of the IT50, first fix the base body 12 of the tool clamper body 15 to a workbench or the like, and then operate the operating unit 19 shown in FIG. 1 to hold each wedge member 18 held by the retainer 20 in a free state by aligning it with the play area A1 of the wedge guide groove 21, as shown in FIG. 7(A).

[0046] The adapter 30 is inserted into the cylindrical portion 17 of the tool clamper body 15 in this state. By operating the operating portion 19 shown in Fig. 1, the wedge members 18 held by the retainers 20 are brought into opposition to the wedge areas A2 on the left side of the wedge guide grooves 21, as shown in Fig. 7(B), and the wedge members 18 are brought into contact with the outer cylindrical portion 31 of the adapter 30. This causes the tool clamper body 15 and the adapter 30 to be integrated.

[0047] 6, the shank portion 41 of the tool holder 4 is inserted into the adapter 30, and the pair of protrusions 32 of the adapter 30 are inserted into the pair of drive keyways 44 of the tool holder 4, so that the upper ends of the outer cylindrical portion 31 and inner cylindrical portion 33 of the adapter 30 come into contact with the lower end of the flange portion 42 of the tool holder 4. This prevents the tool holder 4 from rotating relative to the one-way clutch mechanism 1.

[0048] Next, the shank of cutting tool 45A is inserted into tool holder 4, and chuck portion 43 is rotated clockwise. Because tool holder 4 is clamped by tool clamper 10 via adapter 30, manually rotating chuck portion 43 clockwise reduces the diameter of chuck portion 43, and the shank of cutting tool 45A inserted into chuck portion 43 is chucked.

[0049] The one-way clutch mechanism 1 according to this embodiment can hold a tool holder 4 that is smaller than the tool holder 4A that can be held by the tool clamper 10, simply by arranging the adapter 30 on the inner diameter side of the cylindrical portion 17 of the tool clamper body 15. This eliminates the need to prepare a tool clamper 10 for each tool holder 4 of a different standard or size, allowing for greater compatibility with a single tool clamper 10 and reducing costs.

[0050] Furthermore, by preparing multiple adapters 30 with different inner diameter sizes, one size of tool clamper 10 can be used with tool holders 4 of multiple standards and sizes, thereby further expanding compatibility and reducing costs.

[0051] Although the adapter 30 of this embodiment is formed of two types of material for the outer cylindrical portion 31 and the inner cylindrical portion 33, the entire adapter 30 may be formed of one type of material.

[0052] Furthermore, although the key groove 44 in this embodiment has a shape that opens downward in the axial direction, depending on the shape of the key, it may have a shape that opens upward in the axial direction, and there are no limitations on the shape of the key groove 44. Furthermore, the adapter 30 does not necessarily have to be provided with the pair of protrusions 32.

[0053] (Embodiment 2) A one-way clutch mechanism 1A according to a second embodiment of the present invention will be described with reference to Figures 8 to 10. Figure 8 is a partial perspective view of the one-way clutch mechanism 1A. Figure 9(A) is a perspective view of the adapter, Figure 9(B) is a plan view, and Figure 9(C) is a cross-sectional view taken along line IX-IX in Figure 9(B). Figure 10(A) is a side view of the pull stud, and Figure 10(B) is a cross-sectional view of the adapter attached to the pull stud. The one-way clutch mechanism 1A according to this embodiment is used to hold the pull stud 70 as an attachment member when chucking or unchucking the pull stud 70 into or from the tool holder 4.

[0054] The one-way clutch mechanism 1A shown in Figure 8 includes a one-way clutch member 50 and an adapter 60 attached to the one-way clutch member 50. The one-way clutch member 50 is a one-way clutch-type handle, also known as a one-way clutch handle. The adapter 60 is detachably attached to the handle 50 or pull stud 70, and can be of any size depending on the specifications or size of the pull stud 70. Before describing the handle 50 and adapter 60, we will explain the pull stud 70 held in the one-way clutch mechanism 1A.

[0055] As shown in FIGS. 8 and 10(A), the pull stud 70 is an attachment member for attaching the tool holder 4 to the machine spindle. The pull stud 70 also serves as a connecting member for connecting and fixing the tool holder 4 to the machine spindle. The pull stud 70 includes a shank 71 at one end and a threaded portion 73 at the other end, with a flange 74 as the boundary. A fitting portion 72 having a diameter larger than that of the shank 71 is provided at the tip of the shank 71. The shank 71 and fitting portion 72 are on the machine spindle side, and the fitting portion 72 is the portion that is gripped by a retractable structure provided on the machine spindle. The threaded portion 73 is on the tool holder 4 side and is the portion that is threadedly connected to a fitting hole in the tool holder 4.

[0056] The flange 74 has a pair of notches 75 on the shaft 71 side. The pair of notches 75 are flat surfaces provided at positions facing each other on the outer periphery of the flange 74. Typically, the pair of notches 75 are intended for holding tools such as spanners or wrenches. Therefore, the distance between the flat surfaces of the pair of notches 75 from the outer periphery is set to a width that allows a tool of a predetermined size to be engaged. This distance between the flat surfaces is called the two-face width. In this embodiment, the pair of notches 75 are formed so that a pair of protrusions 66 of the adapter 60, which will be described later, can be caught in them.

[0057] Next, the configuration of a one-way clutch type handle 50 will be described with reference to Figure 8. The handle 50 includes a cylindrical portion 51 and a grip portion 52 fixed to the cylindrical portion 51. The cylindrical portion 51 has, for example, a wedge member 53, a retainer, a wedge guide groove, and an operating member. Note that although the retainer, wedge guide groove, and operating member are not shown in Figure 8, the one-way clutch type structure is achieved with substantially the same structure as the cylindrical portion 17 of the tool clamper body 15 of the first embodiment.

[0058] As shown in Figure 8, the one-way clutch type handle 50 is used to prevent the mounting member 70 from rotating relative to the handle 50 when chucking or unchucking the pull stud 70 into or from the tool holder 4. The handle 50 is basically designed to grip a fixed size or standard of the mounting member 70, and is unable to hold tool holders of multiple standards and sizes. This is because the handle 50 of this embodiment grips the outer diameter of the flange 74 of the mounting member 70 with the inner diameter side of the cylindrical portion 51, and the flange 74 of the mounting member 70 varies depending on the standard and size.

[0059] Therefore, in the one-way clutch mechanism 1A of this embodiment, the adapter 60 is used when a mounting member 70 smaller than the target mounting member 70 is used instead of the target mounting member 70.

[0060] 8, 9, and 10(B), the adapter 60 will be described. By using the adapter 60 of this embodiment, it can be used for an attachment member 70 that is smaller in size than an attachment member 70 that is directly held by the handle 50.

[0061] The adapter 60 is attached to the inner diameter side of the ring-shaped member 51 (cylindrical portion) of the handle 50 and is capable of directly holding the pull stud 70. Because the adapter 60 is inserted into the cylindrical portion 51 of the handle 50, the outer diameter of the adapter 60 is smaller than the inner diameter of the cylindrical portion 51. Specifically, as shown in FIGS. 9(C) and 10(B), the inner diameter side of the adapter 60 is formed with a first step portion 63 located at the bottom end and a second step portion 64 located above it. The flange portion 74 of the pull stud 70 is provided with a pair of notches 75. As a result, as shown in FIG. 10(B), when the adapter 60 is attached to the pull stud 70, the first step portion 63 of the adapter 60 abuts against the upper end of the flange portion 74 of the pull stud 70. Note that there is a gap between the upper end of the notch portion 75 of the pull stud 70 and the second step portion 64, and they do not abut.

[0062] 9(A), the outer diameter side of adapter 60 includes a generally ring-shaped base plate 61 and a peripheral wall 62 that extends downward from base plate 61. Peripheral wall 62 is provided with a pair of protrusions 66 at opposing positions. The pair of protrusions 66 are adapted to fit into a pair of cutouts 75 in pull stud 70, and are therefore sized to fit the size of cutouts 75 in a given size pull stud 70.

[0063] 8, a method for using adapter 60 will be described. Adapter 60 is used when one-way clutch-type handle 50 is used to hold a pull stud 70 that is smaller than the pull stud that can be directly held by one-way clutch-type handle 50.

[0064] First, although not shown, the tool holder 4 is fixed to a tool clamper capable of holding the tool horizontally. Next, the adapter 60 is attached to the pull stud 70. Specifically, as shown in FIG. 10(B), with the pair of protrusions 66 of the adapter 60 facing the pull stud 70, the shaft 71 of the pull stud 70 is passed through the through-hole of the adapter 60, and the flange 74 of the pull stud 70 is brought into contact with the first step 63 of the adapter 60. This brings the pair of notches 75 of the pull stud 70 into a mating state with the pair of protrusions 66 of the adapter 60, as shown in FIG. 8. Note that the upper ends of the notches 75 of the pull stud 70 and the second step 64 do not come into contact, leaving a gap.

[0065] In this state, the adapter 60 is fitted into the one-way clutch-type handle 50. As a result, the peripheral wall portion 62 (outer diameter) of the adapter 60 fits into the wedge member 53 of the handle 50, and the pull stud 70 is held in the handle 50 via the adapter 60. The threaded portion 73 of the pull stud 70 is inserted into the through-hole of the tool holder 4, and the handle 50 is rotated by hand by holding the grip portion 52 of the handle 50. Because the pair of notches 75 of the pull stud 70 fits into the pair of protrusions 66 of the adapter 60, the adapter 60 and pull stud 70 rotate together. As a result, even a pull stud 70 of a size that cannot be used with the handle 50 can be attached to the tool holder 4 using the handle 50.

[0066] In the second embodiment, a pull stud is used as an example of a mounting member to be attached to tool holder 4, but other connecting members such as a coolant pipe may also be used.

[0067] Furthermore, although the adapters 30, 60 of the first and second embodiments have been described as being used to hold objects smaller than the members 10, 70 to be grasped, they may also be used to hold objects larger than the members 10, 70 to be grasped.

[0068] In the first embodiment, the one-way clutch member 10 is a one-way clutch type tool clamper and the mounting member 45 is a cutting tool, and in the second embodiment, the one-way clutch member 50 is a one-way clutch type handle and the mounting member 70 is a pull stud, but the above embodiments are merely examples, and the one-way clutch members 10 and 50 may be other one-way clutch type members, and the mounting members 45 and 70 may also be members for chucking or unchucking to the tool holder 4.

[0069] The adapter 60 of embodiment 1 has been described as having an inner tube portion 33 made of a soft material and an outer tube portion 31 made of a hard material, but the adapter 60 of embodiment 2 may also be configured in a similar manner.

[0070] In the above-mentioned first and second embodiments, the one-way clutch mechanism 1 is described as including the one-way clutch member 10, 50 and the adapter 30, 60. However, the adapter 30, 60 may be provided separately. This allows the adapter 30, 60 to be used with the one-way clutch member 10, 50 already in hand, thereby further reducing costs.

[0071] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope. [Industrial Applicability]

[0072] The present invention is advantageously used in machine tools. [Explanation of symbols]

[0073] 1,1A One-way clutch mechanism, 4,4A Tool holder (mounting member), 10 Tool clamper (one-way clutch member), 17 Cylindrical portion, 30 Adapter, 31 Outer cylindrical portion, 32 Convex portion, 33 Inner cylindrical portion, 41,41A Shank portion, 44 Keyway, 45,45A Cutting tool (mounting member), 50 Handle (one-way clutch member), 51 Cylindrical portion, 60 Adapter, 70 Pull stud (mounting member).

Claims

1. 1. An adapter to be attached to a one-way clutch member for holding a tool holder when chucking or unchucking a mounting member to the tool holder, the adapter is attached to the inner diameter side of the cylindrical portion of the one-way clutch member and is capable of holding a shank portion of a tool holder having a size different from that of the tool holder attached to the one-way clutch member, the adapter includes an outer cylindrical portion that contacts the cylindrical portion of the one-way clutch member, and an inner cylindrical portion that contacts the tool holder of a different size, The adapter, wherein the inner cylindrical portion is formed of a soft material and the outer cylindrical portion is formed of a hard material.

2. the one-way clutch member is a one-way clutch type tool clamper, the attachment member chucked or unchucked to the tool holder is a cutting tool, 2. The adapter according to claim 1, wherein the adapter is capable of holding a shank portion of a tool holder having a size different from that of the tool holder attached to the one-way clutch member.

3. 3. The adapter according to claim 2, wherein the outer cylindrical portion includes a pair of upwardly protruding projections that can be inserted into a pair of keyways provided at positions 180° symmetrical to each other in the tool holders of different sizes.

4. An adapter for a mounting member that is attached to a one-way clutch member for holding the mounting member when chucking or unchucking the mounting member on a tool holder, the adapter is attached to the inner diameter side of the cylindrical portion of the one-way clutch member and is capable of holding an attachment member of a size different from that of the attachment member attached to the one-way clutch member, The one-way clutch member is a one-way clutch type handle, the attachment member that is chucked or unchucked to the tool holder is a pull stud, The adapter for a mounting member includes a ring-shaped base and a pair of protrusions protruding from the base and adapted to fit into a pair of cutouts formed in the mounting member.

5. A one-way clutch mechanism for holding a tool holder when chucking or unchucking an attachment member to the tool holder, comprising: a one-way clutch member including a cylindrical portion into which a shank portion of the tool holder is inserted and held; an adapter attached to an inner diameter side of the cylindrical portion of the one-way clutch member and configured to hold a shank portion of a tool holder having a size different from that of the tool holder, the adapter includes an outer cylindrical portion that contacts the cylindrical portion of the one-way clutch member, and an inner cylindrical portion that contacts the tool holder of a different size, A one-way clutch mechanism, wherein the inner cylindrical portion is made of a soft material and the outer cylindrical portion is made of a hard material.

6. A one-way clutch mechanism for holding a mounting member when chucking or unchucking the mounting member on a tool holder, comprising: a one-way clutch member including a cylindrical portion for inserting and holding the mounting member; an adapter for a mounting member attached to an inner diameter side of the cylindrical portion of the one-way clutch member, for holding a mounting member of a different size than the mounting member; The one-way clutch member is a one-way clutch type handle, the attachment member that is chucked or unchucked to the tool holder is a pull stud, The adapter includes a ring-shaped base and a pair of protrusions that protrude from the base and are adapted to fit into a pair of notches formed in the mounting member.

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