Socket and rotary tool

Abstract

To provide a socket which enables a fully-threaded screw to be rotated efficiently, and to provide a rotary tool.SOLUTION: A socket 10 includes: a first cylindrical part 12 having a housing part 20; a plurality of rollers 30 housed in the housing part 20; a holding member 32 which holds the rollers 30; and a plurality of restriction members 34 provided between an inner peripheral surface 20a of the housing part 20 and an outer peripheral surface 32b of the holding member 32. The inner peripheral surface 20a includes a plurality of curved parts 21a. When the first cylindrical part 12 rotates to one side in a circumferential direction Y relative to a fully-threaded screw, each roller 30 is sandwiched between a portion located closer to the other side than a center in the circumferential direction Y of the curved part 21a and the fully-threaded screw to fix the first cylindrical part 12 and the fully-threaded screw to each other. When the first cylindrical part 12 rotates to the other side in the circumferential direction Y relative to the fully-threaded screw, each restriction member 34 contacts with the roller 30 to restrict the roller 30 from moving to the one side in the circumferential direction Y relative to the first cylindrical part 12.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a socket and a rotating tool capable of rotating a full thread. [Background technology]

[0002] Conventionally, various sockets that can be attached to power tools such as impact wrenches have been proposed. For example, Patent Document 1 discloses a socket for an electric wrench that is connected to a power tool for use. One end of the body of the socket for an electric wrench in Patent Document 1 is provided with a connection part for connecting to the power tool. In addition, a first recess for rotating a nut and a second recess for rotating a threaded part are provided in this order on the other end side of the body.

[0003] The first recess is configured to be removably fitted with the nut. The second recess houses a mechanism that fixes the threaded portion to the main body and rotates the threaded portion when the main body rotates. With this configuration, the nut can be rotated by fitting the nut into the first recess and rotating the main body with a power tool. Also, the threaded portion of a Home Tie (registered trademark) or the like can be inserted into the second recess and rotating the main body with a power tool to rotate the threaded portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 4-29365 Summary of the Invention [Problem to be solved by the invention]

[0005] The electric wrench socket disclosed in the above Patent Document 1 is intended to be connected to an electric tool for use, but the configuration disclosed in Patent Document 1 can also be used in a manual rotating tool for rotating a full screw. For example, by providing the mechanism provided in the second recess of the electric wrench socket in Patent Document 1 in the socket of a manual socket wrench, the full screw can be rotated manually.

[0006] Incidentally, in the electric wrench socket of Patent Document 1, the mechanism provided in the second recess is configured to be able to rotate the full screw regardless of the rotation direction of the electric tool. In other words, it is configured to be able to fix the full screw to the main body not only when the electric tool rotates forward, but also when the electric tool rotates reversely.

[0007] On the other hand, when using a manual socket wrench, when rotating a full screw in one direction, it is necessary to repeatedly rotate the socket wrench in one direction around the full screw. For this reason, it is necessary to configure the socket wrench so that when rotating the socket wrench in one direction relative to the full screw, the rotation is transmitted from the socket to the full screw, and when rotating the socket wrench in the opposite direction relative to the full screw, the rotation is not transmitted from the socket to the full screw. However, if the configuration disclosed in Patent Document 1 is adopted as it is, the rotation of the socket is transmitted to the full screw even when rotating the socket wrench in the opposite direction.

[0008] Therefore, for example, it is conceivable to provide a ratchet mechanism between the handle portion and the socket of the socket wrench. In this case, the socket wrench can be configured so that when the socket wrench is rotated in one direction relative to the full screw, the socket rotates in one direction, and when the socket wrench is rotated in the reverse direction relative to the full screw, the socket does not rotate in the reverse direction. This makes it possible to block the transmission of rotation from the socket wrench to the full screw when the socket wrench is rotated in the reverse direction relative to the full screw.

[0009] However, in the configuration of Patent Document 1, there is a large amount of play before the full screw and the socket are fixed. When the full screw is rotated by rotating the socket with a power tool, there is no problem even if there is a large amount of play before the full screw and the socket are rotated, but when the full screw is rotated by manually rotating the socket wrench repeatedly, the work efficiency is significantly reduced if the play is large.

[0010] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a socket and a rotating tool that are capable of efficiently rotating a full thread. [Means for solving the problem]

[0011] The present invention relates to the following socket and rotary tool.

[0012] (1) a first cylindrical portion having a hollow receiving portion and into which a full screw can be inserted; A plurality of cylindrical rollers are accommodated in the accommodation portion so as to extend along the axial direction of the first cylindrical portion; a holding member that is accommodated in the accommodating portion so that the full screw can be inserted in the axial direction and that holds the rollers; a columnar regulating member provided between an inner circumferential surface of the accommodation portion and an outer circumferential surface of the holding member so as to extend along the axial direction, When viewed from the axial direction, the inner circumferential surface includes a plurality of curved portions, the number of which is equal to the number of the rollers, that are equally spaced in the circumferential direction of the first cylindrical portion and that are curved in an arc so as to be convex toward an outer side in the radial direction of the first cylindrical portion, when viewed from the axial direction, when a virtual circle inscribed in the inner circumferential surface is taken as a reference circle, the curved portion is curved such that a distance between the reference circle and both ends of the curved portion in the radial direction is smaller than a distance between the reference circle and a center of the curved portion in the radial direction, the holding member holds the rollers such that the rollers and the curved portions face each other in the radial direction, each of the rollers is held by the holding member so as to protrude inward and outward from the holding member in the radial direction and to be movable in the circumferential direction and the radial direction relative to the holding member; the regulating member is provided on one side of the roller in the circumferential direction between any one of the curved portions and the outer circumferential surface of the holding member, When viewed from the axial direction, when the first cylindrical portion rotates in one direction in the circumferential direction relative to the full screw, each of the rollers is sandwiched between a portion of the curved portion that is on the other side of the center in the circumferential direction and the full screw, thereby fixing the first cylindrical portion and the full screw, when viewed from the axial direction, when the first cylindrical portion rotates toward the other side in the circumferential direction relative to the full thread, the regulating member contacts the roller from the one side, thereby regulating the roller from moving toward the one side in the circumferential direction relative to the first cylindrical portion, A socket in which the roller, whose movement toward the one side is restricted by the restricting member, can move radially outward more than the roller when the first cylindrical portion and the full thread are fixed.

[0013] (2) The socket according to (1) above, wherein the regulating member is provided for each of the plurality of bending portions.

[0014] (3) The socket according to (1) or (2) above, wherein the number of rollers accommodated in the accommodating portion is three.

[0015] (4) The socket according to any one of (1) to (3) above, wherein the regulating member has a cylindrical shape and is curved in an arc.

[0016] (5) The socket according to any one of (1) to (3) above, wherein the regulating member has an elliptical cylindrical shape or a rectangular cylindrical shape.

[0017] (6) a second cylindrical portion connected to an end of the first cylindrical portion in the axial direction and having a first socket hole at an end opposite to the first cylindrical portion in the axial direction; The socket described in any of (1) to (5) above, further comprising: a third cylindrical portion that is inserted into the second cylindrical portion so as to be movable in the axial direction relative to the second cylindrical portion, and that has a second socket hole at an end opposite the first cylindrical portion in the axial direction.

[0018] (7) A rotary tool having a socket according to any one of (1) to (6) above. Effect of the Invention

[0019] According to the present invention, a socket and a rotating tool capable of efficiently rotating a full thread are provided. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic perspective view showing a socket according to an embodiment of the present invention and a rotary tool including the socket. [Diagram 2] FIG. 2 is a diagram showing a socket according to the present embodiment. [Diagram 3] FIG. 3 is a diagram showing a socket according to the present embodiment. [Figure 4] FIG. 4 is a diagram showing a socket according to the present embodiment. [Diagram 5] FIG. 5 is a diagram for explaining the shapes of the first cylindrical portion, the second cylindrical portion, and the third cylindrical portion. [Figure 6] FIG. 6 is a diagram for explaining the operation of the third cylindrical portion. [Figure 7] FIG. 7 is a schematic diagram showing the positional relationship between the inner circumferential surface of the accommodating portion, the plurality of rollers, the holding member, the plurality of regulating members, and the complete screw. [Figure 8] FIG. 8 is a schematic diagram showing the positional relationship between the inner circumferential surface of the accommodating portion, the plurality of rollers, the holding member, the plurality of regulating members, and the complete screw. [Figure 9] FIG. 9 is a diagram showing a modified example of the socket. [Figure 10] FIG. 10 shows another modified example of the socket and a rotary tool including the socket. [Figure 11] FIG. 11 shows another modified example of the socket. [Figure 12] FIG. 12 is a diagram showing still another modified example of the socket. [Figure 13] FIG. 13 is a diagram showing a modified example of the restricting member. [Figure 14] FIG. 14 is a diagram showing another modified example of the restricting member. [Figure 15] FIG. 15 is a diagram for explaining a modified example of the shape of the curved portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A socket and a rotary tool including the socket according to an embodiment of the present invention will now be described with reference to the drawings.

[0022] (Socket configuration) FIG. 1 is a schematic perspective view showing a socket according to an embodiment of the present invention and a rotary tool including the socket. As shown in FIG. 1, the rotary tool 100 includes a handle portion 101 and a socket 10 according to an embodiment of the present invention. The socket 10 is attached to a head portion 102 of the handle portion 101. In this embodiment, the rotary tool 100 is a ratchet wrench. As will be described later, by operating a claw portion 103 provided on the head portion 102, the direction in which the socket 10 can rotate with respect to the handle portion 101 can be changed. Note that the socket 10 according to this embodiment is not limited to use as a socket for a ratchet wrench, and may be fixed to the handle portion for use. The socket 10 will be described in detail below.

[0023] Fig. 2 to Fig. 4 are diagrams showing a socket according to this embodiment. Specifically, Fig. 2(a) is an external view of the socket, Fig. 2(b) is a left side view of the socket shown in Fig. 2(a), and Fig. 2(c) is a right side view of the socket shown in Fig. 2(a). Fig. 3(a) is a cross-sectional view showing the internal structure of the socket, and Fig. 3(b) is an enlarged cross-sectional view showing a portion bb in Fig. 3(a). Also, Fig. 4 is an exploded perspective view of the socket.

[0024] As shown in FIG. 2 to FIG. 4, the socket 10 includes a first cylindrical portion 12, a second cylindrical portion 14, and a third cylindrical portion 16. In this embodiment, the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16 are provided coaxially. That is, in this embodiment, the axial centers of the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16 coincide with each other. Hereinafter, the axial direction of the socket 10 (the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16) is referred to as the axial direction X. In this specification, the side where the first cylindrical portion 12 is located relative to the second cylindrical portion 14 in the axial direction X is referred to as one side in the axial direction X, and the opposite side is referred to as the other side in the axial direction X. In the following description, a direction passing through the axis of the socket 10 (the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16) and perpendicular to the axis is defined as the radial direction of the socket 10 (the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16). The circumferential direction of the first cylindrical portion 12 is described as the circumferential direction Y (see FIG. 3(b)).

[0025] 2(a), the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16 are each configured to allow insertion of a rod-shaped complete screw 200. In this embodiment, the complete screw 200 can be inserted into the socket 10 so as to penetrate the socket 10 in the axial direction X.

[0026] The first cylindrical portion 12 and the second cylindrical portion 14 are configured to be removable. The third cylindrical portion 16 is inserted into the second cylindrical portion 14 so as to be movable in the axial direction X. FIG. 5 is a diagram for explaining the shapes of the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16. Note that FIG. 5(a) shows the first cylindrical portion 12, the second cylindrical portion 14, and the third cylindrical portion 16 in a state in which the first cylindrical portion 12 is removed from the second cylindrical portion 14. FIG. 5(b) is an enlarged cross-sectional view showing a portion bb in FIG. 5(a), and FIG. 5(c) is an enlarged cross-sectional view showing a portion cc in FIG. 5(a).

[0027] As shown in Figs. 3 to 5, the first cylindrical portion 12 has a hollow shape with one end face and the other end face in the axial direction X being open. In this embodiment, the first cylindrical portion 12 has a storage portion 20, a retaining portion 22, and a connecting portion 24. In this embodiment, the storage portion 20 has a non-circular inner circumferential surface 20a in a cross section perpendicular to the axial direction X. The storage portion 20 also has an annular flange surface 20b extending radially inward of the first cylindrical portion 12 from the edge of the inner circumferential surface 20a on the other side in the axial direction X.

[0028] As shown in FIG. 3(b), the inner circumferential surface 20a has a plurality of curved portions 21a as viewed from the axial direction X. The curved portions 21a are arranged at equal intervals in the circumferential direction of the first cylindrical portion 12 and are curved in an arc shape so as to be convex toward the outside in the radial direction of the first cylindrical portion 12. The inner circumferential surface 20a has a shape in which the curved portions 21a are provided at portions corresponding to the vertices of a polygon as viewed from the axial direction X. In this embodiment, the inner circumferential surface 20a has a shape in which the curved portions 21a are provided at portions corresponding to the vertices of a triangle as viewed from the axial direction X. Therefore, the inner circumferential surface 20a has three curved portions 21a.

[0029] 3(b), a virtual circle inscribed in the inner circumferential surface 20a is defined as a reference circle 21b when viewed from the axial direction X. When viewed from the axial direction X, each curved portion 21a is curved such that the distance between the reference circle 21b in the radial direction of the first cylindrical portion 12 and both ends of the curved portion 21a (both ends in the circumferential direction Y) is smaller than the distance between the reference circle 21b in the radial direction and the center of the curved portion 21a (center in the circumferential direction Y). In this embodiment, the distance between the reference circle 21b in the radial direction of the first cylindrical portion 12 and the curved portion 21a becomes smaller as it moves away from the center of the curved portion 21a in the circumferential direction Y.

[0030] 3(a) and (b), the housing section 20 houses a plurality of rollers 30, a holding member 32, and a plurality of regulating members 34. In this embodiment, three rollers 30 are housed in the housing section 20. Each roller 30 has a cylindrical shape and is provided so as to extend along the axial direction X.

[0031] The retaining member 32 has a cylindrical shape, and is accommodated in the accommodating portion 20 so that a full thread 200 (see FIG. 2(a)) can be inserted in the axial direction X. A plurality of notches 32a are formed in the retaining member 32. The plurality of notches 32a are formed at equal intervals in the circumferential direction of the retaining member 32. Each notch 32a is formed so as to extend from one end of the retaining member 32 in the axial direction X toward the other end. In this embodiment, the retaining member 32 has the same number of notches 32a as the rollers 30. Specifically, the retaining member 32 has three notches 32a.

[0032] The rollers 30 are held by a holding member 32. In this embodiment, the rollers 30 are fitted into each of the cutout portions 32a. The holding member 32 holds the rollers 30 such that the rollers 30 and the curved portions 21a face each other in the radial direction of the first cylindrical portion 12.

[0033] As shown in Fig. 3(b), in this embodiment, a notch 32a is formed in the radial direction of the first cylindrical portion 12 so that the rollers 30 do not fall off from the holding member 32 toward the center. In this embodiment, each roller 30 is held by the holding member 32 so as to protrude inward and outward from the holding member 32 in the radial direction of the first cylindrical portion 12 and to be movable in the circumferential and radial directions of the first cylindrical portion 12 relative to the holding member 32. Also, as shown in Fig. 3(a), in this embodiment, each roller 30 is held by the holding member 32 so that the center of each roller 30 is located on one side (the side of the retaining portion 22) of the center of the holding member 32 in the axial direction X.

[0034] As shown in FIGS. 3(a) and 3(b), each regulating member 34 is formed in a columnar shape and is provided between the inner peripheral surface 20a of the storage section 20 and the outer peripheral surface 32b of the holding member 32 so as to extend along the axial direction X. In this embodiment, each regulating member 34 has a cylindrical shape and is curved in an arc. In this embodiment, the same number of regulating members 34 as the rollers 30 are provided. Specifically, three regulating members 34 are provided so as to correspond to the three rollers 30, respectively. Each regulating member 34 is provided between the curved portion 21a of the inner peripheral surface 20a of the storage section 20 and the outer peripheral surface 32b of the holding member 32. In this manner, in this embodiment, a roller 30 and a regulating member 34 are provided for each curved portion 21a. Each regulating member 34 is provided on one side of the corresponding roller 30 in the circumferential direction of the first cylindrical portion 12.

[0035] 3(a), 4, and 5, the retaining portion 22 is provided on one side of the accommodation portion 20 in the axial direction X. The retaining portion 22 has a cylindrical inner circumferential surface 22a extending from an end face on one side of the first cylindrical portion 12 in the axial direction X toward the other side, and an annular flange surface 22b extending from an edge on the other side of the inner circumferential surface 22a in the axial direction X toward the inside in the radial direction of the first cylindrical portion 12. A groove 22c is formed in the center of the inner circumferential surface 22a in the axial direction X so as to be recessed toward the outside in the radial direction of the first cylindrical portion 12.

[0036] As shown in FIG. 2(b), FIG. 3(a), and FIG. 4, the lid member 36 and the retaining member 38 are fitted into the retaining portion 22 from one side in the axial direction X. The lid member 36 has a hollow disk shape so that the full thread 200 (FIG. 2) can be inserted. The retaining member 38 is fitted into the groove 22c of the inner circumferential surface 22a. In this embodiment, a C-ring is used as the retaining member 38. In this embodiment, the movement of the lid member 36 to one side in the axial direction X is restricted by the retaining member 38, and the movement of the lid member 36 to the other side in the axial direction X is restricted by the flange surface 22b. In addition, the lid member 36 prevents the rollers 30, the holding member 32, and the restricting members 34 from falling off from one side in the axial direction X of the first cylindrical portion 12. Furthermore, the holding member 32 and the plurality of restricting members 34 are prevented from falling off from the other side in the axial direction X of the first tubular portion 12 by the flange surface 20b.

[0037] 3(a), 4, and 5, the connecting portion 24 is provided to extend from the storage portion 20 to the other side in the axial direction X. In this embodiment, the connecting portion 24 has a polygonal outer circumferential surface in a cross section perpendicular to the axial direction X.

[0038] The second cylindrical portion 14 has a hollow shape with one end face and the other end face in the axial direction X being open. In this embodiment, the second cylindrical portion 14 has an outer socket portion 40 and a connecting portion 42. In the outer socket portion 40, a tooth portion 40a consisting of a plurality of teeth (external teeth) is formed on the outer peripheral surface of the end portion on one side in the axial direction X. Referring to FIG. 1, the tooth portion 40a (see FIG. 3) is attached to the head portion 102 so as to contact the claw portion 103 of the handle portion 101. In the rotary tool 100, the direction in which the tooth portion 12a can rotate relative to the claw portion 103 can be switched by operating the claw portion 103. This makes it possible to switch the direction in which the socket 10 can rotate relative to the handle portion 101. Note that the configuration for attaching the socket 10 to the head portion 102 and the configuration for switching the rotation direction of the socket 10 can use the configuration of a known ratchet wrench, and therefore detailed description thereof will be omitted.

[0039] As shown in FIG. 5(a), the inner surface of the outer socket portion 40 includes a socket hole 41a, a locking surface 41b, a cylindrical surface 41c, a locking surface 41d, and a cylindrical surface 41e. The socket hole 41a is provided at the other end of the outer socket portion 40 in the axial direction X. The socket hole 41a has a polygonal shape when viewed from the axial direction X. In this embodiment, the socket hole 41a functions as a first socket hole. As shown in FIG. 5(b), in this embodiment, the socket hole 41a has a hexagonal shape when viewed from the axial direction X. In this embodiment, the socket hole 41a can hold a fastening member (bolt, nut, etc.) not shown.

[0040] As shown in Fig. 5(a), the cylindrical surface 41c is provided on one side of the socket hole 41a in the axial direction X. As shown in Fig. 5(b), when viewed from the axial direction X, the cylindrical surface 41c is formed so as to have approximately the same diameter as a circle circumscribing the socket hole 41a.

[0041] The locking surfaces 41b are provided so as to connect the socket hole 41a and the cylindrical surface 41c. As shown in Fig. 5(b) , in this embodiment, six locking surfaces 41b are provided so as to connect the socket hole 41a and the cylindrical surface 41c. In this embodiment, when viewed from the axial direction X, each locking surface 41b has an arch shape.

[0042] 5(a), the cylindrical surface 41e is provided on one side of the cylindrical surface 41c in the axial direction X. In a cross section perpendicular to the axial direction X, the diameter of the cylindrical surface 41e is smaller than the diameter of the cylindrical surface 41c. The locking surface 41d is formed in an annular shape and connects the cylindrical surface 41c and the cylindrical surface 41e.

[0043] The connecting portion 42 is provided on one side of the outer socket portion 40 in the axial direction X. The inner circumferential surface of the connecting portion 42 has a shape corresponding to the outer circumferential surface of the connecting portion 24. As described above, in this embodiment, the outer circumferential surface of the connecting portion 24 has a polygonal shape in a cross section perpendicular to the axial direction X. Therefore, the inner circumferential surface of the connecting portion 42 also has a polygonal shape in a cross section perpendicular to the axial direction X.

[0044] As shown in Figures 3 and 5, the third cylindrical portion 16 has a hollow shape with one end face and the other end face in the axial direction X being open. As shown in Figures 3 and 6, the third cylindrical portion 16 is inserted into the second cylindrical portion 14 so as to be movable in the axial direction X. As shown in Figures 3 to 6, in this embodiment, the third cylindrical portion 16 has an inner socket portion 60, a guide portion 62, and a locking portion 64.

[0045] 3(a), 5 and 6, the outer peripheral surface 60a of the inner socket portion 60 has a polygonal shape corresponding to the socket hole 41a of the outer socket portion 40. The outer diameter of the inner socket portion 60 (the diameter of an imaginary circle circumscribing the outer peripheral surface 60a) is smaller than the aperture of the socket hole 41a (the diameter of an imaginary circle circumscribing the socket hole 41a). In this embodiment, the socket hole 41a and the outer peripheral surface 60a are engaged with each other, so that the second cylindrical portion 14 and the third cylindrical portion 16 rotate integrally.

[0046] The inner peripheral surface 60b of the inner socket portion 60 has a polygonal shape in a cross section perpendicular to the axial direction X. In this embodiment, the inner peripheral surface 60b functions as a second socket hole. Hereinafter, the inner peripheral surface 60b will be referred to as a socket hole 60b. The socket hole 60b is provided at the other end of the inner socket portion 60 in the axial direction X. In this embodiment, the socket hole 60b has a hexagonal shape when viewed from the axial direction X. In this embodiment, the socket hole 60b can hold a fastening member (bolt, nut, etc.) not shown.

[0047] The guide portion 62 is provided to extend from the inner socket portion 60 to one side in the axial direction X. In this embodiment, the guide portion 62 has a cylindrical shape. The outer diameter of the guide portion 62 is smaller than the outer diameter of the inner socket portion 60. The locking portion 64 protrudes outward from the guide portion 62 in the radial direction of the third cylindrical portion 16. In this embodiment, the tip of the guide portion 62 protrudes further toward one side in the axial direction X than the locking portion 64.

[0048] 5, an outer peripheral surface 64a of the locking portion 64 has the same shape as an outer peripheral surface 60a of the inner socket portion 60. Specifically, the outer peripheral surface 64a of the locking portion 64 has a polygonal shape corresponding to the socket hole 41a.

[0049] In the outer socket portion 40, a retaining member 50 is provided between the multiple locking surfaces 41b and the locking portion 64. In this embodiment, a C-ring is used as the retaining member 50. In this embodiment, the locking portion 64 is locked to the multiple locking surfaces 41b via the retaining member 50, thereby restricting the third cylindrical portion 16 from moving to the other side in the axial direction X relative to the second cylindrical portion 14. In addition, as shown in FIG. 6, the locking portion 64 is locked to the locking surface 41d, thereby restricting the third cylindrical portion 16 from moving to one side in the axial direction X relative to the second cylindrical portion 14.

[0050] In this embodiment, when the third cylindrical portion 16 is inserted into the second cylindrical portion 14, the retaining member 50 is first fitted to the outside of the guide portion 62. Specifically, the retaining member 50 is attached to a portion of the guide portion 62 that is on the other side in the axial direction X than the locking portion 64. Next, the guide portion 62 and the locking portion 64 of the third cylindrical portion 16 are inserted into the outer socket portion 40. At this time, the retaining member 50 is pushed into the outer socket portion 40 while being contracted toward the radial inside of the second cylindrical portion 14 (while being contracted in this embodiment). As shown in FIG. 6, by pushing the third cylindrical portion 16 to a position where the locking portion 64 is locked by the locking surface 41d, the retaining member 50 moves to one side in the axial direction X than the multiple locking surfaces 41b (see FIG. 5). This prevents the retaining member 50 from falling off from the second cylindrical portion 14 to the other side in the axial direction X.

[0051] 3 to 6, a biasing member 52 is provided inside the second cylindrical portion 14 (outer socket portion 40). In this embodiment, a coil spring is used as the biasing member 52. The other end of the biasing member 52 in the axial direction X is fitted into the tip portion of the guide portion 62 so as to be supported by the locking portion 64.

[0052] The connecting portion 24 of the first cylindrical portion 12 is inserted into the connecting portion 42 of the second cylindrical portion 14 so as to support one end of the urging member 52 in the axial direction X. In this embodiment, the urging member 52 is supported by the connecting portion 24 of the first cylindrical portion 12 and the locking portion 64 of the third cylindrical portion 16 so as to urge the third cylindrical portion 16 toward the other side in the axial direction X. As shown in FIGS. 2 and 4, in this embodiment, the connecting portion 24 (see FIG. 4) and the connecting portion 42 are fixed by a fixing member 56.

[0053] (How to use sockets) First, a case where a fastening member (bolt, nut, etc.) is rotated by the second cylindrical portion 14 and the third cylindrical portion 16 will be described. The direction in which the socket 10 can rotate relative to the handle portion 101 can be appropriately changed depending on the direction in which the fastening member is rotated. The same applies to the case where a full screw 200 is rotated.

[0054] In the socket 10 according to this embodiment, when no external force is applied to the third tubular portion 16, as shown in FIG. 3, the third tubular portion 16 is positioned at a position where the locking portion 64 is locked to the locking surface 41b via the retaining member 50. In this state, a part of the inner socket portion 60 protrudes from the outer socket portion 40, and the socket hole 41a of the outer socket portion 40 is not exposed. Therefore, of the socket hole 41a of the outer socket portion 40 and the socket hole 60b of the inner socket portion 60, only the socket hole 60b can be used. In this state, a fastening member such as a bolt or a nut can be fitted into the socket hole 60b, and the fastening member can be rotated.

[0055] On the other hand, as shown in Fig. 6, the socket hole 41a of the outer socket part 40 can be exposed by pushing the third cylindrical part 16 to one side in the axial direction X. This allows the socket hole 41a of the outer socket part 40 to be used. In this case, a fastening member such as a bolt or a nut can be fitted into the socket hole 41a and the fastening member can be rotated. Thus, in the socket 10 according to this embodiment, the socket hole 41a of the outer socket part 40 and the outer peripheral surface 60a of the inner socket part 60 can be selectively used by moving the third cylindrical part 16 in the axial direction X.

[0056] Next, a description will be given of the case where the complete screw 200 is rotated. When the complete screw 200 is rotated by the socket 10, the complete screw 200 is first inserted into the socket 10 as shown in FIG.

[0057] 7 and 8 are schematic diagrams showing the positional relationship between the inner circumferential surface 20a of the accommodating portion 20, the rollers 30, the retaining member 32, the regulating members 34, and the complete screw 200 in the socket 10 into which the complete screw 200 is inserted. Note that Figs. 7 and 8 show the inner circumferential surface 20a, the rollers 30, the retaining member 32, and the regulating members 34 as viewed from one side in the axial direction X. Also, in Figs. 7 and 8, the side of the regulating member 34 corresponding to a roller 30 as viewed from the roller 30 along the circumferential direction Y is defined as one side in the circumferential direction Y, and the opposite side is defined as the other side.

[0058] As shown in Fig. 7, in this embodiment, when the first cylindrical portion 12 is rotated to one side in the circumferential direction Y relative to the complete thread 200, each roller 30 is sandwiched between the complete thread 200 and a portion of the curved portion 21a on the other side of the center in the circumferential direction Y. This fixes the first cylindrical portion 12 and the complete thread 200. As a result, the complete thread 200 rotates in conjunction with the rotation of the first cylindrical portion 12. Therefore, in this embodiment, the complete thread 200 can be rotated by rotating the first cylindrical portion 12 to one side in the circumferential direction Y.

[0059] 8 , when the first cylindrical portion 12 is rotated relative to the full thread 200 to the other side in the circumferential direction Y, each regulating member 34 comes into contact with the roller 30 from one side in the circumferential direction Y. In this embodiment, each regulating member 34 comes into contact with a portion of the roller 30 that is outer than the center of the roller 30 in the radial direction of the first cylindrical portion 12. This prevents the roller 30 from moving to one side in the circumferential direction Y relative to the first cylindrical portion 12.

[0060] In this embodiment, the regulating member 34 comes into contact with the roller 30, so that the roller 30 is positioned at a position facing the center of the curved portion 21a in the circumferential direction Y. As a result, compared to the state shown in FIG. 7 (where the first cylindrical portion 12 and the complete screw 200 are fixed via a plurality of rollers 30), each roller 30 can move radially outward from the first cylindrical portion 12. In this case, a gap can be formed between the complete screw 200 and each roller 30, so that the first cylindrical portion 12 can be prevented from being fixed to the complete screw 200 via the roller 30. As a result, the first cylindrical portion 12 can be rotated to the other side in the circumferential direction Y relative to the complete screw 200. That is, the first cylindrical portion 12 can be rotated idly, and the transmission of rotation from the socket 10 to the complete screw 200 can be prevented.

[0061] Therefore, an operator can rotate the complete screw 200 in one direction by holding the handle portion 101 of the rotary tool 100 and repeatedly rotating the socket 10 to one side and the other side in the circumferential direction Y.

[0062] (Socket effect) In the socket 10 according to the present embodiment, as described above, when the first cylindrical portion 12 (socket 10) is rotated to the other side in the circumferential direction Y with respect to the complete thread 200 (when the first cylindrical portion 12 is rotated idly with respect to the complete thread 200), each of the regulating members 34 contacts the roller 30 from one side in the circumferential direction Y. This prevents the roller 30 from moving to one side in the circumferential direction Y with respect to the first cylindrical portion 12, so that the movement range of the roller 30 in the circumferential direction Y with respect to the first cylindrical portion 12 can be reduced. As a result, when the first cylindrical portion 12 is rotated to one side in the circumferential direction Y with respect to the complete thread 200, the time required for the roller 30 to be sandwiched between the curved portion 21a and the complete thread 200 is shortened. That is, the play until the complete thread 200 and the socket 10 are fixed can be reduced. This allows the complete thread 200 to be rotated efficiently.

[0063] In this embodiment, each of the regulating members 34 has an arc-shaped curved shape. In this case, the regulating member 34 can be prevented from rolling in the circumferential direction Y between the first cylindrical portion 12 and the holding member 32. This allows the regulating member 34 to be positioned at an appropriate position, and when the first cylindrical portion 12 (socket 10) is rotated to the other side in the circumferential direction Y with respect to the complete thread 200, the regulating member 34 can be sufficiently prevented from being caught between the first cylindrical portion 12 and the holding member 32. As a result, when the first cylindrical portion 12 is rotated to one side and the other side in the circumferential direction Y with respect to the complete thread 200, the roller 30 can be reliably positioned at an appropriate position, and the transmission and interruption of rotation from the first cylindrical portion 12 to the complete thread 200 can be more smoothly performed.

[0064] (Modification) In the above embodiment, as shown in FIG. 3, the center of each roller 30 is positioned on one side (the side of the retaining member 32) of the center of the retaining member 32 in the axial direction X, but the positional relationship between the rollers 30 and the retaining member 32 is not limited to the above example. Specifically, for example, as shown in FIG. 9, each roller 30 may be held by the retaining member 32 so that the center of each roller 30 is positioned on the other side (the third cylindrical portion 16 side) of the center of the retaining member 32 in the axial direction X. In the socket 10 shown in FIG. 9, the orientation of the retaining member 32 in the axial direction X is opposite to the orientation of the retaining member 32 in the socket 10 shown in FIG. 3. In the configuration shown in FIG. 9, when the full screw 200 is inserted into the socket 10, the multiple rollers 30 come into contact with the full screw 200 on the center side of the socket 10 in the axial direction X, as compared with the configuration shown in FIG. 3. In this case, the full screw 200 can be sufficiently prevented from tilting in the socket 10, so that the full screw 200 can be rotated more smoothly.

[0065] In the above-described embodiment, the socket 10 is configured to hold a fastening member such as a bolt and a nut in addition to the full screw 200, but the socket does not have to have a configuration for rotating the fastening member. FIG. 10 is a schematic diagram showing a socket 10a according to a modified example and a rotary tool 100a including the same. The socket 10a shown in FIG. 10 is different from the above-described socket 10 in that it does not include the second cylindrical portion 14, the third cylindrical portion 16, the retaining member 50, and the biasing member 52. In this embodiment, the connecting portion 24 of the first cylindrical portion 12 is fixed to the head portion 102a of the handle portion 101a. In this embodiment, too, the operator can insert the full screw 200 into the socket 10a, hold the handle portion 101a of the rotary tool 100a, and rotate the socket 10a repeatedly to rotate the full screw 200 in one direction.

[0066] In the socket 10a according to this embodiment, as in the above-described socket 10, the first cylindrical portion 12 can be rotated idly relative to the full screw by contacting the restricting member 34 (see FIG. 8) with the roller 30 (see FIG. 8). Therefore, even if the handle portion 101a is not provided with a ratchet mechanism, the operator can smoothly rotate the full screw in only one direction by holding the handle portion 101a and repeatedly rotating the socket 10a to one side and the other side in the circumferential direction Y (see FIG. 8).

[0067] In the socket 10, 10a, as described above, the movement of the roller 30 is restricted by the restricting member 34, so that the first cylindrical portion 12 can rotate freely relative to the full thread. Therefore, in order to allow the first cylindrical portion 12 to rotate freely (to restrict the movement of the roller 30 in the circumferential direction Y relative to the first cylindrical portion 12), it is not necessary to process the inner circumferential surface 20a (see FIG. 8) of the accommodation portion 20 of the first cylindrical portion 12 into a complex shape. In this embodiment, the shape of the inner circumferential surface 20a of the accommodation portion 20 can be made similar to the inner circumferential surface of a conventional socket for full thread rotation that is attached to a power tool and used. Specifically, when viewed from the axial direction, the inner circumferential surface 20a of the accommodation portion 20 can be made into a simple shape in which curved portions are provided at portions corresponding to the vertices of a polygon. In this way, in the socket 10, 10a according to this embodiment, the simple configuration of a conventional socket for full thread rotation that is attached to a power tool and used can be utilized, so that the processing cost can be suppressed.

[0068] In the above embodiment, the restricting member 34 has a cylindrical shape, but the shape of the restricting member 34 is not limited to the above example. For example, as shown in Fig. 11, the restricting member 34 may have an elliptical cylindrical shape, and as shown in Fig. 12, the restricting member 34 may have a polygonal prism shape (a quadrangular prism shape in Fig. 12). In these cases, too, the restricting member 34 can be prevented from rolling in the circumferential direction Y (see Fig. 8) between the first tubular portion 12 and the holding member 32.

[0069] As shown in FIG. 13, both ends of the regulating member 34 may have a flat shape. In FIG. 13, (a) is a front view showing the regulating member, and (b) is a right side view showing the regulating member. When the regulating member 34 shown in FIG. 13 is used, both ends having a flat shape can prevent the regulating member 34 from rolling in the circumferential direction Y with respect to the first cylindrical portion 12. The regulating member 34 shown in FIG. 13 can be manufactured, for example, by crushing both ends of a cylindrical member. In addition, when manufacturing a plurality of regulating members 34 by cutting a wire rod having a circular cross section, the shape of the cut portion including burrs may be left as it is. In this case, too, the cut portion has a flat shape, so that the cut portion can prevent the regulating member 34 from rolling in the circumferential direction Y with respect to the first cylindrical portion 12. In addition, for example, as shown in FIG. 14, the end portion of the regulating member 34 (both ends in the example shown in FIG. 14) may be bent into a hook shape. In this case as well, the bent end portion can prevent the restricting member 34 from rolling in the circumferential direction Y relative to the first cylindrical portion 12. As described above, by providing at least a part of the restricting member 34 with a portion having a non-circular cross section (an elliptical portion, a polygonal prism portion, a flattened portion, etc.), a bent portion, or a curved portion, the restricting member 34 can be prevented from rolling in the circumferential direction Y relative to the first cylindrical portion 12.

[0070] In the above embodiment, the regulating member 34 is provided for each curved portion 21a (roller 30), but it is sufficient that the regulating member 34 is provided for at least one curved portion 21a (roller 30), and the regulating member 34 may not be provided for any curved portion 21a (roller 30). However, in order to position each roller 30 at an appropriate position, it is preferable that the regulating member 34 is provided for each curved portion 21a (roller 30). Also, in the above embodiment, the case where three curved portions 21a are provided on the inner circumferential surface 20a of the storage portion 20 of the first cylindrical portion 12 has been described, but four or more curved portions may be provided on the inner circumferential surface of the storage portion. That is, the inner circumferential surface of the storage portion may have a shape in which curved portions are provided at portions corresponding to the vertices of a polygon having more than one side, as viewed from the axial direction of the first cylindrical portion. In this case, it is preferable that a roller is provided for each curved portion, and a regulating member is provided for each curved portion (roller), as in the above embodiment.

[0071] In the above embodiment, the case has been described in which the distance between the reference circle 21b and the curved portion 21a in the radial direction of the first cylindrical portion 12 becomes smaller as the distance from the center of the curved portion 21a in the circumferential direction Y of the first cylindrical portion 12 increases, but the shape of the curved portion 21a is not limited to the above example. FIG. 15 shows another example of the shape of the curved portion. In FIG. 15, a virtual circle 21c circumscribing the inner circumferential surface 20a of the storage portion 20 is shown by a two-dot chain line as viewed from the axial direction X (see FIG. 3(a)). The virtual circle 21c is a concentric circle of the reference circle 21b. In the example shown in FIG. 15, the center portion of the curved portion 21a (a region of a predetermined length including the center in the circumferential direction Y) has an arc shape that overlaps with the virtual circle 21c. In this case, the distance between the reference circle 21b and the curved portion 21a in the radial direction of the first cylindrical portion 12 is constant in the center portion of the curved portion 21a, and becomes smaller as the distance from the center portion of the curved portion 21a in the circumferential direction Y increases. Even when the curved portion 21a is configured in this manner, the same effects as those of the above-described embodiment can be obtained.

[0072] In the above embodiment, the socket and the handle portion are separate members, but the first cylindrical portion of the socket may be integrally formed with the handle portion. Also, the positional relationship between the roller 30 and the regulating member 34 in the circumferential direction Y of the first cylindrical portion 12 may be opposite to that shown in FIG. 3(b). [Industrial Applicability]

[0073] According to the present invention, a socket and a rotating tool capable of efficiently rotating a full thread are provided. [Explanation of symbols]

[0074] 10,10a socket 12 First cylindrical portion 14 Second cylindrical section 16 Third cylindrical section 20 Storage unit 30. Laura 32 Retaining member 34 Regulatory components 100,100a Rotary tools 200 Full thread

Claims

1. a first cylindrical portion having a hollow receiving portion and into which a full screw can be inserted; A plurality of cylindrical rollers are accommodated in the accommodation portion so as to extend along an axial direction of the first cylindrical portion; a holding member that is accommodated in the accommodating portion so that the full screw can be inserted in the axial direction and that holds the rollers; a columnar regulating member provided between an inner circumferential surface of the accommodation portion and an outer circumferential surface of the holding member so as to extend along the axial direction, When viewed from the axial direction, the inner circumferential surface includes a plurality of curved portions, the number of which is equal to the number of the rollers, that are disposed at equal intervals in the circumferential direction of the first cylindrical portion and that are curved in an arc shape so as to be convex toward an outer side in the radial direction of the first cylindrical portion, when viewed from the axial direction, when a virtual circle inscribed in the inner circumferential surface is taken as a reference circle, the curved portion is curved such that a distance between the reference circle and both ends of the curved portion in the radial direction is smaller than a distance between the reference circle and a center of the curved portion in the radial direction, the holding member holds the rollers such that the rollers and the curved portions face each other in the radial direction, each of the rollers is held by the holding member so as to protrude inward and outward from the holding member in the radial direction and to be movable in the circumferential direction and the radial direction relative to the holding member; the regulating member is provided on one side of the roller in the circumferential direction between any one of the curved portions and the outer circumferential surface of the holding member, When viewed from the axial direction, when the first cylindrical portion rotates in one direction in the circumferential direction relative to the full screw, each of the rollers is sandwiched between a portion of the curved portion on the other side in the circumferential direction from the center and the full screw, thereby fixing the first cylindrical portion and the full screw, when viewed from the axial direction, when the first cylindrical portion rotates toward the other side in the circumferential direction relative to the full thread, the regulating member contacts the roller from the one side, thereby regulating the roller from moving toward the one side in the circumferential direction relative to the first cylindrical portion, A socket in which the roller, whose movement to one side is restricted by the restricting member, can move radially outward more than the roller when the first cylindrical portion and the full thread are fixed.

2. The socket according to claim 1 , wherein the restricting member is provided for each of the plurality of curved portions.

3. 3. The socket according to claim 1, wherein the number of rollers accommodated in the accommodating portion is three.

4. The socket according to claim 1 , wherein the restricting member has a cylindrical shape and is curved in an arc.

5. The socket according to claim 1 , wherein the restricting member has an elliptical cylindrical shape or a rectangular cylindrical shape.

6. a second cylindrical portion connected to an end portion of the first cylindrical portion in the axial direction and having a first socket hole at an end portion opposite to the first cylindrical portion in the axial direction; The socket according to claim 1 or 2, further comprising: a third cylindrical portion that is inserted into the second cylindrical portion so as to be movable in the axial direction relative to the second cylindrical portion, and that has a second socket hole at an end opposite the first cylindrical portion in the axial direction.

7. A rotary tool comprising the socket according to claim 1 or 2.

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