Contracting body

Abstract

To provide a rotary jig that makes it possible to hold and rotate a fastening component such as an eyebolt, another mechanical element having an annular head, or a fastener, as a target object, with good workability and in a stable state.SOLUTION: A rotary jig 1 comprises: a shank 10 which is rotatable by an external force applied from one end side thereof; and a hook 20 which is provided on the other end side of the shank 10 and on which a target object is to be hooked. The rotary jig 1 rotates the target object in accordance with a rotary force applied to the shank 10. The hook 20 has groove(s) 22 and / or 23 that is / are formed along the surface shape of the target object on a surface facing the target object which rotates in accordance with rotation of the hook 20 when the hook rotates with the target object hooked thereon.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a rotating jig for rotating a fastening part such as an eye bolt or other mechanical element having a circular head, or a fastener, as an object, and to a fastening rotating body that can be used as a fastening part such as an eye bolt or other mechanical element having a circular head, or a fastener, which can be rotated by a general rotating jig. [Background technology]

[0002] BACKGROUND ART Various techniques have been proposed for efficiently fastening eye bolts used in slings such as ropes and towing hooks without relying on manual turning.

[0003] For example, Patent Document 1 discloses an eyebolt rotation jig that is attached to a power tool and has two side wall materials that form a fitting groove that fits into the ring-shaped head of the eyebolt, and a shaft material that fits into the rotating part of the power tool and is driven to rotate.

[0004] Patent document 2 also discloses an eyebolt mounting jig that can efficiently fasten eyebolts of different sizes, which has multiple pairs of grooves provided at positions symmetrical to the central axis of a cylindrical socket portion joined to the same central axis as a mounting shaft portion that can be inserted into the chuck of a rotary tool, and which corresponds to the shapes of the ring-shaped heads of multiple types of eyebolts. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 7-20262 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-202651 Summary of the Invention [Problem to be solved by the invention]

[0006] In these jigs of the above-mentioned conventional technology, the annular head of the eyebolt fits into a fitting groove or groove, clamping the head from the outside, but because the fit between the eyebolt and the jig is free to position along the axial direction, there is a risk that the jig will come off, making it difficult to fasten the eyebolt in a stable state. Also, to align the jig to the eyebolt, the head of the eyebolt and the jig must be aligned in a straight line along the rotational direction of the eyebolt, which requires high precision and impairs workability.

[0007] Therefore, the main object of this invention is to provide a fastening rotating body that can be implemented as a rotating jig that can hold and rotate fastening parts such as eye bolts and other mechanical elements with annular heads, or fasteners, in a stable and easy-to-operate state, or that can be implemented as fastening parts such as eye bolts and other mechanical elements with annular heads, or fasteners, that can be rotated by a general rotating jig. [Means for solving the problem]

[0008] The first invention of the present invention is a fastening rotary body comprising an axial portion rotatable by an external force applied from one end side, and a hooking portion provided on the other end side of the axial portion, which comes into contact with the inner surface of a predetermined object having a closed or partially cut-out annular outer shape and hooks onto the object, and which rotates around the central axis of the axial portion as a rotation axis in response to a rotational force applied from the object to the axial portion, wherein the hooking portion has at least one set of grooves formed rotationally symmetrically about the rotation axis in accordance with the shape of the object in a front view and a plan view on a surface that interferes with the object that rotates in response to the hooking portion when the fastening rotary body rotates while holding the object, and any one set of the at least one set of grooves simultaneously interferes with the object when the hooking portion rotates while holding the object. A second aspect of the present invention is the fastening rotating body of the first aspect of the present invention, wherein the groove portion includes at least one pair of a front groove located on one side of a plane including the rotation axis of the shaft portion and a back groove located on the other side of the plane, and the front groove and the back groove of the groove portion are arranged with the rotation axis of the shaft portion sandwiched therebetween. A third aspect of the present invention is the fastening rotating body of the second aspect of the present invention, wherein the groove portion includes two pairs of the front groove and the back groove, and the front groove of one of the two pairs of groove portions and the front groove of the other of the two pairs of groove portions are arranged on one surface side of the plane with the rotation axis of the shaft portion therebetween, and the back groove of one of the two pairs of groove portions and the back groove of the other of the two pairs of groove portions are arranged on the other surface side of the plane with the rotation axis of the shaft portion therebetween. A fourth aspect of the present invention is the fastening rotating body according to the second or third aspect of the present invention, wherein the front groove and the back groove of the groove portion are arranged symmetrically with respect to the rotation axis of the shaft portion. In the fifth aspect of the present invention, the shape of the front groove and the shape of the back groove of the groove portion are symmetrical with respect to the rotation axis of the shaft portion when viewed from a direction perpendicular to the plane. 10 is a fastening rotary body according to the second or third aspect of the present invention. A sixth aspect of the present invention is the fastening rotating body according to the second or third aspect of the present invention, wherein the front groove and the back groove in the set of groove portions are curved in a generally arc-like shape that is convex in a direction away from the rotation axis of the shaft portion when viewed from a direction perpendicular to the plane. The seventh aspect of the present invention is the fastening rotating body of the first aspect of the present invention, wherein the shaft portion serves as a shank portion that is detachably connected to a machine or tool that generates a rotational force, and the catch portion serves as a hook portion that catches the object from the tip and serves as a rotating jig that rotates the object in response to the rotational force applied to the shank portion. The eighth aspect of the present invention is 7 The present invention provides a remote control tool comprising a fastening rotating body that functions as the rotating jig, and a connecting portion that is connected to one end side of the shaft portion that functions as the shank portion. A ninth aspect of the present invention is the fastening rotating body according to the first aspect of the present invention, wherein the shank has either a male thread formed on the outer peripheral surface or a female thread formed on the inner peripheral surface, and serves as a threaded portion that screws into an object to be fastened, and the catch portion serves as an annular head that can be hooked onto the object, which is a hook, and serves as a fastener that is fastened to the object by screwing in response to a rotational force from the object. [Effects of the Invention]

[0009] The fastening rotating body of this invention makes it possible to hold and rotate fastening parts such as eye bolts or other mechanical elements with annular heads, or fasteners, as objects, or fastening parts such as eye bolts or other mechanical elements with annular heads, or fasteners themselves, in a stable and easy-to-use state.

[0010] The above and other objects, features, and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a rotating jig as an example of a fastening rotating body according to an embodiment of the present invention; [Figure 2] 1 is a perspective view showing a rotating jig as an example of a fastening rotating body according to an embodiment of the present invention; [Figure 3] 1 is a front view showing a rotating jig as an example of a fastening rotating body according to an embodiment of the present invention; [Figure 4] 1 is a rear view showing a rotating jig as an example of a fastening rotating body according to an embodiment of the present invention; [Figure 5] 1 is a right side view showing a rotating jig as an example of a fastening rotating body according to an embodiment of the present invention; FIG. [Figure 6] 1 is a left side view showing a rotating jig as an example of a fastening rotating body according to an embodiment of the present invention; [Figure 7]1 is a plan view showing a rotating jig as an example of a fastening rotating body according to an embodiment of the present invention; [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] FIG. 4 is a cross-sectional view taken along line XX in FIG. [Figure 11] 1 is a perspective view showing a state in which a rotating jig, which is an example of a fastening rotating body according to an embodiment of the present invention, is used; [Figure 12] 1 is a cross-sectional view illustrating a state in which a rotating jig, which is an example of a fastening rotating body according to an embodiment of the present invention, is used. [Figure 13] 1 is a cross-sectional view illustrating a state in which a rotating jig, which is an example of a fastening rotating body according to an embodiment of the present invention, is used. [Figure 14] 4 is a cross-sectional view illustrating a groove portion of a rotating jig that is an example of a fastening rotating body according to the present invention. FIG. [Figure 15] 10 is a front view illustrating a groove portion of a rotating jig that is an example of a fastening rotating body according to the present invention. FIG. [Figure 16] 1 is a front view showing a remote control device equipped with a rotating jig that is an example of a fastening rotating body according to an embodiment of the present invention. [Figure 17] 1 is a perspective view showing a fastener which is an example of a fastening rotary body according to an embodiment of the present invention; [Figure 18] 1 is a perspective view showing a fastener which is an example of a fastening rotary body according to an embodiment of the present invention; [Figure 19] 1 is a front view showing a fastener that is an example of a fastening rotary body according to an embodiment of the present invention; [Figure 20] 1 is a rear view showing a fastener that is an example of a fastening rotary body according to an embodiment of the present invention; [Figure 21] 1 is a right side view showing a fastener that is an example of a fastening rotary body according to an embodiment of the present invention. FIG. [Figure 22]1 is a left side view showing a fastener that is an example of a fastening rotary body according to an embodiment of the present invention; [Figure 23] 1 is a plan view showing a fastener that is an example of a fastening rotary body according to an embodiment of the present invention; [Figure 24] FIG. 20 is a cross-sectional view taken along line XXIV-XXIV in FIG. 19. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a fastening rotary body will be described in this embodiment as an example of the present invention.

[0013] (1. Rotating jig) A rotating jig 1, which is an example of a rotating fastening body according to an embodiment of the present invention, will be described below. Figures 1 and 2 are perspective views showing the rotating jig 1 according to an embodiment of the present invention.

[0014] The rotating jig 1 is a tool that rotates in cooperation with a rotary tool or other tool (not shown) (hereinafter referred to as "tools"), and rotates an object such as an eyebolt by following the object. The rotating jig 1 includes a shank portion 10 and a hook portion 20.

[0015] (shank part) The shank portion 10 connects the instrument and the hook portion 20 and transmits torque from the instrument to the hook portion 20. The shank portion 10 has a cylindrical outer shape with a circular, oval, or elliptical cross section, and one end, the tip 10a, is detachably connected to the instrument to receive the torque of the instrument and rotate around the central axis as the rotation axis AR. The other end, the connection end 10b, of the shank portion 10 is connected to the hook portion 20.

[0016] (Hook part) The hook portion 20 is an example of a hooking portion of the present invention, and is a portion that is hooked onto an object and transmits torque from an instrument directly to the object to rotate it. The hook portion 20 has a main body 21 that has a circular, oval, or elliptical cross section and an outer shape that is curved in a roughly C-shape.

[0017] Main body 21 has a generally annular outer shape with a portion thereof cut out, forming a generally C-shaped outer shape. One end of main body 21 forms tip 21T for hooking an object such as an eyebolt, and the other end forms base end 21B that is continuous with shank 10. A gap G is formed between tip end 21T and base end 21B, and part of the object hooked by tip end 21T passes through gap G.

[0018] In the turning jig 1, the shank portion 10 and the hook portion 20 are molded as a single unit. This allows the connecting end 10b of the shank portion 10 and the base end portion 21B of the main body portion 21 to be formed in a seamless, continuous manner. The turning jig 1 is preferably formed by precision casting using a metal material such as cast iron, but may also be formed by forging or any other means.

[0019] In the following description, in the rotating jig 1, the side where the shank portion 10 is located is defined as the lower side, the side where the hook portion 20 is located as the upper side, the side where the tip portion 21T of the hook portion 20 is located as the left side, and the side between the tip portion 21T and the base end portion 21B of the hook portion 20 as the right side. As a result, the direction parallel to the rotation axis AR of the shank portion 10 is the up-down direction, the direction connecting the left and right sides of the hook portion 20 is the left-right direction, and the direction perpendicular to these directions is the front-rear direction.

[0020] Based on this, Fig. 3 is a front view showing the front side of the turning jig 1, Fig. 4 is a back view showing the rear side of the turning jig 1, Fig. 5 is a right side view of the turning jig 1, Fig. 6 is a left side view of the turning jig 1, and Fig. 7 is a plan view of the turning jig 1. Fig. 8 is a schematic cross-sectional view taken along line VIII-VIII in Fig. 3. Fig. 9 is a schematic cross-sectional view taken along line IX-IX in Fig. 3. Fig. 10 is a schematic cross-sectional view taken along line XX in Fig. 3. The following explanation will be made based on the definitions of directions above and reference to the Cartesian coordinates shown in each figure.

[0021] For example, the substantially C-shaped outer shape of the main body 21 of the hook portion 20 is the shape when viewed from behind, as shown in Fig. 4. Also, as shown in Fig. 7, the main body 21 is divided into a front portion 21a located on the front side of an imaginary plane P that includes the rotation axis AR of the shank portion 10 and the tip portion 21T and extends in the vertical and horizontal directions, and a back portion 21b located on the back side of the plane P. In the perspective views of Figs. 1 and 4, the boundary between the front portion 21a and the back portion 21b by the plane P is indicated by a dashed line.

[0022] 3 and 4, the rotation axis AR of the shank portion 10 and the center C of the hook portion 20 overlap in the front-to-rear direction and are offset in the left-to-right direction, so in the rotating jig 1, the hook portion 20 rotates eccentrically relative to the rotation of the shank portion 10. However, if the offset value is small compared to the outer diameter of the hook portion 20 (e.g., less than 5%), the rotation axis AR and the center C of the hook portion 20 can be treated as being substantially coaxial, and the hook portion 20 can be considered to rotate without eccentricity relative to the rotation of the shank portion 10. Furthermore, the rotation axis AR and the center C may be configured to be completely coaxial.

[0023] (groove) The hook portion 20 has grooves 22 and 23 formed on the surface of the main body portion 21 so as to extend from the top portion toward the base end portion 21B.

[0024] The groove portion 22 is a set of a front groove 22a formed in the front portion 21a of the main body portion 21 and a back groove 22b formed in the back portion 21b of the main body portion 21.

[0025] The front groove 22a is disposed on the left side of the rotation axis AR in a front view. The rear groove 22b is also disposed on the left side of the rotation axis AR in a rear view. In other words, as shown in Figures 3 and 4, the arrangement of the front groove 22a and the rear groove 22b in the main body 21 is symmetrical with respect to the rotation axis AR on a projection plane including the front and rear faces.

[0026] 3, the front groove 22a extends obliquely from near the top of the main body 21, past the center C of the hook 20, to near the tip 21T, and has a generally arc-shaped central portion that is convexly curved to the left of the upper and lower ends in a front view, i.e., away from the pivot axis AR. This shape of the front groove 22a is preferably formed based on the relationship between the hook 20 and the head of an eyebolt as an object, which will be described later.

[0027] 8 to 10, the position and cross-sectional shape of the front groove 22a on the main body 21 change along the up-down direction of the main body 21. Specifically, the front groove 22a moves from right to left along the outer periphery of the main body 21 from near the top of the main body 21 to near the tip 21T. Furthermore, the front groove 22a has a concavely curved arc-shaped cross section, and the width and depth gradually increase from near the top of the main body 21 to the center, and gradually decrease from the center to near the tip 21T.

[0028] 1 and 3, the front groove 22a has edge portions 22a1 and 22a2 located on both outer edges of the front groove 22a. The edge portions 22a1 and 22a2 protrude as shown in Fig. 9. By providing the edge portions 22a1 and 22a2, it is possible to prevent the outer edge of an object such as an eyebolt from going beyond the edge portions 22a1 and 22a2 and coming off the turning jig 1 when the turning jig 1 is turned.

[0029] 4, rear groove 22b extends obliquely from near the top of main body 21, past center C of hook 20, to near the position facing tip 21T, and has a generally arc-shaped central portion convexly curved to the left in rear view relative to both the top and bottom ends, i.e., away from pivot axis AR. This shape of rear groove 22b is preferably formed based on the relationship between hook 20 and the head of an eyebolt as an object, which will be described later.

[0030] 8 to 10, the position and cross-sectional shape of the back groove 22b on the main body 21 change along the up-down direction of the main body 21. Specifically, the back groove 22b moves from left to right along the outer periphery of the main body 21 from near the top of the main body 21 to near the position facing the tip 21T. Furthermore, the back groove 22b has a concavely curved arc-shaped cross section, and the width and depth gradually increase from near the top of the main body 21 to the central portion and gradually decrease from the central portion to near the position facing the tip 21T.

[0031] 2 and 4, the rear groove 22b has edge portions 22b1 and 22b2 located on both outer edges of the rear groove 22b. The edge portions 22b1 and 22b2 protrude as shown in Fig. 9. The presence of the edge portions 22b1 and 22b2 makes it possible to prevent the outer edge of an object such as an eyebolt from going beyond the edge portions 22b1 and 22b2 and coming off the rotating jig 1 when the rotating jig 1 is rotated.

[0032] The groove portion 23 is a set of a front groove 23a formed in the front portion 21a of the main body portion 21 and a back groove 23b formed in the back portion 21b of the main body portion 21.

[0033] The front groove 23a is disposed on the right side of the rotation axis AR in a front view. The rear groove 23b is also disposed on the right side of the rotation axis AR in a rear view. In other words, as shown in Figures 3 and 4, the arrangement of the front groove 23a and the rear groove 23b in the main body 21 is symmetrical with respect to the rotation axis AR on a projection plane including the front and rear faces.

[0034] 3, the front groove 23a extends obliquely from near the top of the main body 21, past the center C of the hook 20, to near the position facing the tip 21T, and has a generally arc-shaped appearance in front view, with the central portion curved convexly to the right of the upper and lower ends in front view, i.e., in the direction away from the pivot axis AR. This shape of the front groove 23a is preferably formed based on the relationship between the hook 20 and the head of an eyebolt as an object, which will be described later.

[0035] 8 to 10, the position and cross-sectional shape of the front groove 23a on the main body 21 change along the up-down direction of the main body 21. Specifically, the front groove 23a moves from left to right along the outer periphery of the main body 21 from near the top of the main body 21 to near the position facing the tip 21T. Furthermore, the front groove 23a has a concavely curved arc-shaped cross section, and the width and depth gradually increase from near the top of the main body 21 to the central portion and gradually decrease from the central portion to near the position facing the tip 21T.

[0036] 1 and 3, the front groove 23a has edge portions 23a1 and 23a2 located on both outer edges of the front groove 23a. The edge portions 23a1 and 23a2 protrude as shown in Fig. 9. The presence of the edge portions 23a1 and 23a2 makes it possible to prevent the outer edge of an object such as an eyebolt from going beyond the edge portions 23a1 and 23a2 and coming off the turning jig 1 when the turning jig 1 is turned.

[0037] 4, rear groove 23b extends obliquely from near the top of main body 21, past center C of hook 20, to near tip 21T, and has a generally arc-shaped appearance in front view, with the central portion curved convexly to the right of both the top and bottom ends in rear view, i.e., away from pivot axis AR. This shape of rear groove 23b is preferably formed based on the relationship between hook 20 and the head of an eyebolt as an object, which will be described later.

[0038] 8 to 10, the position and cross-sectional shape of the back groove 23b on the main body 21 change along the up-down direction of the main body 21. Specifically, the back groove 23b moves from right to left along the outer periphery of the main body 21 from near the top of the main body 21 to near the tip 21T. Furthermore, the back groove 23b has a concavely curved arc-shaped cross section, and the width and depth gradually increase from near the top of the main body 21 to the center, and gradually decrease from the center to near the tip 21T.

[0039] 2 and 4, the rear groove 23b has edge portions 23b1 and 23b2 located on both outer edges of the rear groove 23b. The edge portions 23b1 and 23b2 protrude as shown in Fig. 9. The presence of the edge portions 23b1 and 23b2 makes it possible to prevent the outer edge of an object such as an eyebolt from going beyond the edge portions 23b1 and 23b2 and coming off the rotating jig 1 when the rotating jig 1 is rotated.

[0040] Furthermore, in the main body 21, the arrangement of the grooves 22 and 23 is symmetrical with respect to the rotation axis AR. As a result, as shown in Fig. 3, the front groove 22a of the groove 22 and the front groove 23a of the groove 23 are arranged separately on the left and right sides with the rotation axis AR therebetween in a front view. Similarly, as shown in Fig. 4, the rear groove 22b of the groove 22 and the rear groove 23b of the groove 23 are arranged separately on the left and right sides with the rotation axis AR therebetween in a rear view.

[0041] In this case, the shapes of the front grooves 22a and 23a are line-symmetrical with respect to the rotation axis AR. Therefore, when the folding member is virtually folded along the rotation axis AR, the front grooves 22a and 23a overlap and match. Similarly, the shapes of the back grooves 22b and 23b are line-symmetrical with respect to the rotation axis AR. Therefore, when the folding member is virtually folded along the rotation axis AR, the front grooves 22a and 23a overlap and match.

[0042] The rotating jig 1 according to the embodiment of the present invention having the above configuration is provided with the hook portion 20 having the groove portion 22 and the groove portion 23, and thereby holds and rotates an object with good workability and stability. In particular, even if the rotating jig 1 is rotated at a relatively high speed using a drive motor such as an electric drill, the rotating jig 1 can rotate the object while holding it in a stable state.

[0043] (operation) 11 to 13, the operation of the turning jig 1 will be described below. In this explanation of the operation, the eyebolt 100 is threadedly engaged with the base 200, and the operation of attaching and detaching the eyebolt 100 will be described.

[0044] Fig. 11 is a perspective view showing a state in which the eyebolt 100, which is the object to be operated by the jig 1, is combined with the turning jig 1. Figs. 12 and 13 are explanatory views corresponding to the cross section of Fig. 9 when the turning jig 1 is operated in the state of Fig. 11.

[0045] As shown in FIG. 11, eyebolt 100, which is the object of turning jig 1, has bolt body 110 that screws into base 200 and head 120 that is molded integrally with the end of bolt body 110.

[0046] The bolt body 110 is threaded to the right, and moves closer to the base 200 when rotated to the right (clockwise) as viewed from the head 120, and moves away from the base 200 when rotated to the left (counterclockwise).

[0047] The head 120 has a continuous annular shape in a plan view including the rotation axis of the bolt body 110, and an opening 120x is formed in the central portion.

[0048] In the illustrated example, the eyebolt 100 has a head 120 that protrudes vertically downward when screwed into the base 200 .

[0049] The turning jig 1 is combined with the eyebolt 100 by inserting the tip 21T of the hook portion 20 into the opening 120x to hook the hook portion 20 onto the head portion 120.

[0050] (When approaching) The operation of bringing the eyebolt 100 closer to the base 200 is performed by rotating the turning jig 1, with the hook portion 20 hooked on the head portion 120, counterclockwise as viewed from above (clockwise as viewed from the head portion 120) as indicated by the white arrow in Fig. 12. That is, the hook portion 20 of the turning jig 1 is arranged around the rotation axis AR of the hook portion 20, and the front portion 21a and back portion 21b of the main body 21 interfere with and press against both ends of the head portion 120 of the eyebolt 100 from opposite directions as indicated by the black arrow in the figure, causing the eyebolt 100 to rotate in the same direction as the hook portion 20.

[0051] At this time, in the head 120 of the eyebolt 100, the surface 120a2 facing the front portion 21a of the main body 21 fits into the front groove 22a formed in the front portion 21a. On the other hand, the surface 120b1 facing the back portion 21b of the main body 21 fits into the back groove 22b formed in the back portion 21b.

[0052] 11, the surface 120a2 of the head 120 is fitted into the front groove 22a, and its movement in the up-down and left-right directions is restricted. The surface 120b1 of the head 120, which is located in the blind spot in FIG. 11, is also fitted into the back groove 22b of the hook portion 20, and its movement in the up-down and left-right directions is restricted.

[0053] As a result, when the eye bolt 100 is rotated by the rotation of the rotating jig 1, the hook portion 20 and the head portion 120 come into surface contact, and their vertical and horizontal movements are maintained restricted relative to each other within the groove portions 22 and 23.

[0054] As shown in FIG. 3, the center line of the approximately C-shaped body 21 of the hook portion 20 is O. In the front groove 22a, the intersection point between the center line O and the edge 22a1 is P1, and the intersection point between the center line O and the edge 22a2 is P2. The linear distance between the intersection points P1 and P2 is defined as the width w1 of the front groove 22a. As shown in FIG. 12, the width w2 of the surface 120a2 and the surface 120b1 of the eyebolt 100 is defined as 0.8≦w2 / w1≦1.0. This preferably satisfies the condition 0.8≦w2 / w1≦1.0. This allows the eyebolt 100 to be stably held in the front groove 22a. As a result, the head 120 of the eyebolt 100 can be stably fitted. The same w2 / w1 relationship applies to the rear groove 22b, the front groove 23a, and the rear groove 22b.

[0055] As shown in FIGS. 4 and 12, the center line of the C-shape of the main body 21 of the hook portion 20 is O. The intersection of the center line O and the edge 22b1 of the rear groove 22b is P3, and the intersection of the center line O and the edge 22b2 is P4. The vertical distance from the line connecting the intersections P3 and P4 to the lowest point of the rear groove 22b is the depth t1 of the rear groove 22b, and the thickness t2 of the head 120 of the eyebolt 100. It is preferable to satisfy the condition 2.6≦t2 / t1≦3.3. This allows the eyebolt 100 to be stably held in the rear groove 22b. As a result, the head 120 of the eyebolt 100 can be stably fitted. The same t2 / t1 relationship applies to the front groove 22a, the front groove 23a, and the rear groove 22b.

[0056] (When separated) The operation of moving the eyebolt 100 away from the base 200 is performed by rotating the turning jig 1, with the hook portion 20 hooked on the head portion 120, clockwise as viewed from above (counterclockwise as viewed from the head portion 120), as shown in Fig. 13, as indicated by the white arrow in the figure. That is, the hook portion 20 of the turning jig 1 is positioned on either side of the rotation axis AR of the hook portion 20, and the front portion 21a and back portion 21b of the main body 21 interfere with and press against both ends of the head portion 120 of the eyebolt 100 from opposite directions, as indicated by the black arrow in the figure, which is the opposite direction from Fig. 12, thereby moving the eyebolt 100.

[0057] At this time, in the head 120 of the eyebolt 100, the surface 120a1 facing the back surface 21b of the main body 21 fits into the front groove 23a formed in the front surface 21a. On the other hand, the surface 120b2 facing the back surface 21b of the main body 21 fits into the back surface groove 23b formed in the back surface 21b.

[0058] Furthermore, in the same manner as when fastened, the surface 120b2 of the head 120 is fitted into the rear groove 23b, and the surface 120a1 is fitted into the front groove 23a, so that vertical and horizontal movement is restricted when viewed from the front or rear.

[0059] As a result, when the eye bolt 100 is rotated by the rotation of the rotating jig 1, the hook portion 20 and the head portion 120 come into surface contact, and their vertical and horizontal movements are maintained restricted relative to each other within the groove portions 22 and 23.

[0060] The width of groove 23 is preferably 80% or more of the width of surfaces 120b2 and 120a1, which allows head 120 of eyebolt 100 to be fitted in well. The depth of groove 22 is preferably 20% or more of the thickness of head 120 of eyebolt 100 at its maximum point, which allows head 120 of eyebolt 100 to be fitted in stably.

[0061] As explained above, in the rotating jig 1 according to an embodiment of the present invention, the hook portion 20 has groove portions 22 and 23, so that when an object such as an eyebolt 100 is fitted into groove portions 22 and 23, movement is restricted in both the up-down direction along the rotation axis AR of the rotating jig 1, and the left-right direction and the front-to-back direction perpendicular to the rotation axis AR, and the object can be rotated while being held in a stable state.

[0062] Furthermore, in the rotating jig 1 according to the embodiment of the present invention, the hook portion 20 and the head 120 of the eyebolt 100 are combined by inserting the tip 21T of the hook portion 20 into the opening 120x and hooking the hook portion 20 onto the head 120. The tip 21T can be inserted from any side that intersects with the rotation axis direction of the eyebolt 100, ensuring good visibility. In addition, the front shape and dimensions of the opening 120x are larger than the shape and dimensions of the tip 21T of the hook portion 20, ensuring a large margin for alignment accuracy. These features make it easier to combine the rotating jig 1 and the eyebolt 100, improving workability.

[0063] Therefore, according to the turning jig 1 according to the embodiment of the present invention, it is possible to turn an object such as an eyebolt while holding it in a stable state with good workability.

[0064] (Position and shape of groove) It is preferable that the planar shapes of the front groove 22a and rear groove 22b of groove portion 22 and the front groove 23a and rear groove 23b of groove portion 23 be formed based on the relationship between the hook portion 20 and the head 120 of the eye bolt 100 as the object. Specifically, it is preferable that the position and shape of groove portion 22 and groove portion 23 be determined as follows.

[0065] The following description will be given taking the groove portion 22 as an example. Figure 14 is an explanatory diagram corresponding to the cross section of Figure 10, which schematically shows the state in which the hook portion 20 of the turning jig 1 and the head portion 120 of the eyebolt 100 are combined. Figure 15 is an explanatory diagram corresponding to the front view of Figure 3, which schematically shows the state in which the hook portion 20 of the turning jig 1 and the head portion 120 of the eyebolt 100 are combined.

[0066] 14, the front portion 21a of the hook portion 20 includes a surface Oa facing one end 120a of the head 120 of the eyebolt 100, and the back portion 21b of the hook portion 20 includes a surface Ob facing the other end 120b of the head 120 of the eyebolt 100. The positions and dimensions (widths) of the surfaces Oa and Ob in the left-right direction of the front portion 21a and the back portion 21b change continuously in the up-down direction, i.e., along the rotation axis AR, and this change in the surfaces Oa and Ob along the rotation axis AR determines the shape of the groove portion 22 when viewed from the front and back.

[0067] Here, the state of change in the left-right position and width of each of the surfaces Oa and Ob is determined based on the position and shape of the hook portion 20 and the head 120 of the eyebolt 100, as well as the state of their combination. Specifically, as shown in Figure 15, in the combination of the hook portion 20 and the head 120 of the eyebolt 100, the center C of the hook portion 20 is offset downward from the center CI of the head 120 of the eyebolt 100. In addition, the outer diameter of the hook portion 20 is larger than the outer diameter of the head 120.

[0068] As a result, when the hook portion 20 rotates, the surface where the hook portion 20 and the head 120 of the eyebolt 100 overlap in a front view is obtained as a surface Oa that is convexly curved in the direction away from the rotation axis AR. Similarly, the surface where the hook portion 20 and the head 120 of the eyebolt 100 overlap in a rear view is obtained as a surface Ob that is convexly curved in the direction away from the rotation axis AR.

[0069] By forming the front groove 22a along the surface Oa in the front portion 21a and forming the back groove 22b along the surface Ob in the back portion 21b, when the hook portion 20 is combined with the head 120 of the eye bolt 100 and the hook portion 20 is rotated counterclockwise when viewed from above, the head 120 of the eye bolt 100 is always fitted into each of the front groove 22a and the back groove 22b.

[0070] The cross sections of the front groove 22a and the back groove 22b preferably have a concavely curved arc-shaped contour. The cross sections of the front groove 22a and the back groove 22b may also have a flat portion. Specifically, as shown in Fig. 14, it is more preferable that the cross section corresponds to the shape of the cross section of the head 120 of the eyebolt 100. The depth of the groove 22 may vary depending on the position on the surfaces Oa and Ob, as shown in Figs. 8 to 10, or may be the same at any position.

[0071] Similarly, groove 23 is obtained as follows: In other words, in the assembled state shown in Figure 14, when hook portion 20 is rotated clockwise relative to head 120 as viewed from above, in the opposite direction to the black arrow in the figure, back portion 21b of hook portion 20 will include a surface facing other end 120b of head 120 of eyebolt 100, and front portion 21a of hook portion 20 will include a surface facing one end 120a of head 120 of eyebolt 100, although this is not shown.

[0072] By forming a front groove 23a and a back groove 23b along each of these surfaces, when the hook portion 20 is combined with the head 120 of the eye bolt 100 and the hook portion 20 is rotated clockwise when viewed from above, the head 120 is always fitted into each of the front groove 23a and the back groove 23b.

[0073] The curvature of the surfaces Oa and Ob may be varied by varying the vertical offset distance between the center C of the hook portion 20 and the center CI of the head portion 120. Specifically, by increasing the offset distance, the positions of the apexes of the front groove 23a and the back groove 23b (i.e., the points farthest from the rotation axis AR) can be shifted downward.

[0074] The shapes of the front groove 23a and the back groove 23b may be determined so as to include all vertices corresponding to the range of the offset between the center C of the hook portion 20 and the center CI of the head portion 120 in the vertical direction.

[0075] Furthermore, the center C of the hook portion 20 and the center CI of the head portion 120 may be offset in the left-right direction. This allows the positions and shapes of the surfaces Oa and Ob to be different and asymmetrical with respect to the rotation axis AR.

[0076] This allows groove portions 22 and 23 to be formed in an appropriate shape depending on the type and application of the object to be rotated by rotating jig 1, making it possible to hold and rotate the object in a stable and easy-to-operate state.

[0077] As described above, groove portions 22 and 23 may be formed along the surface shape of an object such as an eye bolt 100 on the surface facing the object that rotates in conjunction with hook portion 20 when hook portion 20 rotates with the object hooked on tip portion 21T.

[0078] 3 to 13, the arrangement of the front grooves 22a and the back grooves 22b in the groove portion 22 of the rotating jig 1 is symmetrical with respect to the rotation axis AR in a front or rear view, but the arrangement of the front grooves 22a and the back grooves 22b may be such that they are arranged with the rotation axis AR therebetween. Similarly, the arrangement of the front grooves 23a and the back grooves 23b in the groove portion 23 may be such that they are arranged with the rotation axis AR therebetween in a front or rear view.

[0079] However, it is more preferable to arrange the front grooves 22a and 22b, and the front grooves 23a and 23b symmetrically with respect to the rotation axis AR, as this allows for stable rotation by suppressing axial wobble of the rotating jig 1.

[0080] Furthermore, although the shapes of the front groove 22a and the back groove 22b in the groove portion 22 of the rotating jig 1 are described as being symmetrical with respect to the rotation axis AR in a front or rear view, they may be asymmetrical. Similarly, the shapes of the front groove 23a and the back groove 23b in the groove portion 23 may also be asymmetrical with respect to the rotation axis AR in a front or rear view.

[0081] However, it is more preferable to make the shapes of the front groove 22a and the back groove 22b and the front groove 23a and the back groove 23b symmetrical with respect to the rotation axis AR, as this allows the axial wobble of the rotating jig 1 to be suppressed and allows for stable rotation.

[0082] (2. Fasteners) A fastener 3, which is an example of a rotary fastening body according to an embodiment of the present invention, will now be described. Figures 17 and 18 are perspective views showing the fastener 3 according to an embodiment of the present invention. The fastener 3 is rotated by a rotating jig that rotates in cooperation with tools (not shown), and is fastened to a fastening target by fastening. The fastener 3 has a threaded portion 30 and a head portion 40.

[0083] (Threaded joint) The threaded portion 30 is a portion that receives the torque generated by the turning jig from the head 40 and is directly fastened to the object to be fastened. The threaded portion 30 has a cylindrical outer shape, with a male thread 31 formed on its outer circumferential surface. The fastener 3 receives the torque of the tools by being turned by the turning jig, with the central axis of the threaded portion 30 serving as the rotation axis AR, and is threaded into the object to be fastened. The other end of the threaded portion 30, which is a connecting end 32, is connected to the head 40.

[0084] (head) Head 40 is an example of the catch portion of the present invention, and is a portion that is hooked onto a hook, which is an object provided at the tip of the turning jig, and transmits torque from the tool to threaded portion 30 to turn it. Head 40 has a circular, oval, or elliptical cross section, and has an annular outer shape together with connection end 32 of threaded portion 30 when viewed from the front.

[0085] The head 40 has a circular gap CL when viewed from the front. When a hook is inserted into the gap CL, the head 40 is hooked onto the hook.

[0086] In the fastener 3, the threaded portion 30 and the head 40 are integrally molded. This allows the connecting end 32 of the threaded portion 30 and the head 40 to be formed in a seamless, continuous manner. The fastener 3 is preferably formed by precision casting using a metal material such as cast iron, but may also be formed by forging or any other means.

[0087] In the following description, the side of fastener 3 where threaded portion 30 is located is defined as the lower side, and the side where head 40 is located is defined as the upper side. When viewed from the front, the side where male thread 31 of head 40 slopes downward is defined as the left side, and the side where male thread 31 slopes upward is defined as the right side. Thus, the direction parallel to rotation axis AR of threaded portion 30 is the up-down direction, the direction connecting the left and right sides of head 40 is the left-right direction, and the direction perpendicular to these directions is the front-rear direction.

[0088] Based on this, Fig. 19 is a front view showing the front side of the fastener 3, Fig. 20 is a back view showing the rear side of the fastener 3, Fig. 21 is a right side view of the fastener 3, Fig. 22 is a left side view of the fastener 3, and Fig. 23 is a plan view of the fastener 3. Fig. 24 is a schematic cross-sectional view taken along line XXIV-XXIV in Fig. 19. The following explanation will be made based on the definitions of the directions above and on the Cartesian coordinates shown in each figure.

[0089] 17 and 18, the head 40 is divided into a front portion 41a located on the front side of an imaginary plane P that includes the rotation axis AR of the screw-engagement portion 30 and the center C of the head 40 and extends in the vertical and horizontal directions, and a back portion 41b located on the back side of the plane P. In the perspective views of FIGS. 17 and 18, the boundary between the front portion 41a and the back portion 41b defined by the plane P is indicated by a dashed line.

[0090] Although the center C of the head 40 is shown in the drawing as being positioned on the rotation axis AR of the screw-engagement portion 30, it may be overlapped in the front-rear direction and offset in the left-right direction.

[0091] (groove) The head 40 has grooves 42 and 43 formed on its surface so as to extend downward from the top portion toward the threaded portion 30 .

[0092] The groove portion 42 is a set of a front groove 42a formed in the front portion 41a of the head portion 40 and a back groove 42b formed in the back portion 41b of the head portion 40.

[0093] The front groove 42a is disposed on the left side of the rotation axis AR in a front view. The rear groove 42b is also disposed on the left side of the rotation axis AR in a rear view. In other words, as shown in Figures 19 and 20, the arrangement of the front groove 42a and the rear groove 42b in the head 40 is symmetrical with respect to the rotation axis AR on a projection plane including the front and rear faces.

[0094] 19, the front groove 42a extends obliquely from near the top of the head 40 beyond the center C of the head 40 toward the periphery, and has a generally arc-shaped shape in front view, with the central portion curved convexly to the left of the upper and lower ends in front view, i.e., in a direction away from the rotation axis AR. This shape of the front groove 42a is preferably formed based on the relationship between the head 40 and the shape of the hook of the rotating jig as the target.

[0095] Furthermore, similar to the front groove 22a of the rotating jig 1, the position and cross-sectional shape of the front groove 42a in the main body 21 change along the vertical direction of the head 40. Specifically, the front groove 42a moves from right to left along the outer periphery of the head 40 from the upper end to near the center C. Furthermore, the front groove 42a has a cross-sectional profile that is concavely curved in an arc shape, and the width and depth gradually increase from the upper end to the central portion and gradually decrease from the central portion to the lower end.

[0096] 17 and 19, the front groove 42a has edge portions 42a1 and 42a2 located on both outer edges of the front groove 42a. The edge portions 42a1 and 42a2 protrude as shown in Fig. 24. By providing the edge portions 42a1 and 42a2, it is possible to prevent the outer edge of the hook of the rotating jig (as the target) from going beyond the edge portions 42a1 and 42a2 and coming off the fastener 3 when the fastener 3 is rotated.

[0097] 20, the rear groove 42b extends obliquely from near the top of the head 40 beyond the center C of the head 40 toward the periphery, and has a generally arc-shaped shape in rear view, with the central portion curved convexly to the left of the upper and lower ends in front view, i.e., in a direction away from the rotation axis AR. This shape of the rear groove 42b is preferably formed based on the relationship between the head 40 and the shape of the hook of the rotating jig as the target.

[0098] Furthermore, similar to the back groove 22b of the rotating jig 1, the position and cross-sectional shape of the back groove 42b in the main body 21 change along the up-down direction of the head 40. Specifically, the back groove 42b moves from right to left along the outer periphery of the head 40 from the upper end to near the center C. Furthermore, the back groove 42b has a cross-sectional profile that is concavely curved in an arc shape, and the width and depth gradually increase from the upper end to the central portion and gradually decrease from the central portion to the lower end.

[0099] 18 and 20, the rear groove 42b has edge portions 42b1 and 42b2 located on both outer edges of the rear groove 42b. The edge portions 42b1 and 42b2 protrude as shown in Fig. 24. By providing the edge portions 42b1 and 42b2, it is possible to prevent the outer edge of the hook of the rotating jig (as the target) from going beyond the edge portions 42b1 and 42b2 and coming off the fastener 3 when the fastener 3 is rotated.

[0100] The groove portion 43 is a set of a front groove 43a formed in the front portion 41a of the head portion 40 and a back groove 43b formed in the back portion 41b of the head portion 40.

[0101] The front groove 43a is disposed on the right side of the rotation axis AR in a front view. The rear groove 43b is also disposed on the right side of the rotation axis AR in a rear view. In other words, as shown in Figures 19 and 20, the arrangement of the front groove 43a and the rear groove 43b in the head 40 is symmetrical with respect to the rotation axis AR on a projection plane including the front and rear faces.

[0102] 19, the front groove 43a extends obliquely from near the top of the head 40 beyond the center C of the head 40 toward the periphery, and has a generally arc-shaped shape in front view, with the central portion curved convexly to the right of the upper and lower ends in front view, i.e., in the direction away from the rotation axis AR. This shape of the front groove 43a is preferably formed based on the relationship between the head 40 and the shape of the hook of the rotating jig as the target.

[0103] Furthermore, similar to the front groove 23a of the rotating jig 1, the position and cross-sectional shape of the front groove 43a in the main body 21 change along the vertical direction of the head 40. Specifically, the front groove 43a moves from left to right along the outer periphery of the head 40 from the upper end to near the center C. Furthermore, the front groove 43a has a cross section that has a concavely curved arc-shaped contour, and the width and depth gradually increase from the upper end to the central portion and gradually decrease from the central portion to the lower end.

[0104] 17 and 19, the front groove 43a has edge portions 43a1 and 43a2 located on both outer edges of the front groove 43a. The edge portions 43a1 and 43a2 protrude as shown in Fig. 24. By providing the edge portions 43a1 and 43a2, it is possible to prevent the outer edge of the hook of the rotating jig (as the target) from going beyond the edge portions 43a1 and 43a2 and coming off the fastener 3 when the fastener 3 is rotated.

[0105] 20, the rear groove 43b extends obliquely from near the top of the head 40 beyond the center C of the head 40 toward the periphery, and has a generally arc-shaped shape in rear view, with the central portion curved convexly to the right of the upper and lower ends in front view, i.e., in the direction away from the rotation axis AR. This shape of the rear groove 43b is preferably formed based on the relationship between the head 40 and the shape of the hook of the rotating jig as the target.

[0106] Furthermore, like the back groove 23b of the rotating jig 1, the position and cross-sectional shape of the back groove 43b on the head 40 change along the up-down direction of the head 40. Specifically, the back groove 43b moves from left to right along the outer periphery of the head 40 from the upper end to near the center C. Furthermore, the back groove 42b has a concavely curved arc-shaped cross section, with the width and depth gradually increasing from the upper end to the central portion and gradually decreasing from the central portion to the lower end.

[0107] 18 and 20, rear groove 43b has edge portions 43b1 and 43b2 located on both outer edges of rear groove 43b. Edge portions 43b1 and 43b2 protrude as shown in Fig. 24. By providing edge portions 43b1 and 43b2, it is possible to prevent the outer edge of the hook of the rotating jig (as the target) from going beyond edge portions 43b1 and 43b2 and coming off fastener 3 when fastener 3 is rotated.

[0108] Furthermore, in the head 40, the arrangement of the grooves 42 and 43 is symmetrical with respect to the rotation axis AR. As a result, as shown in Fig. 19, the front groove 42a of the groove 42 and the front groove 43a of the groove 43 are arranged separately on the left and right sides with the rotation axis AR therebetween in a front view. Similarly, as shown in Fig. 20, the rear groove 42b of the groove 42 and the rear groove 43b of the groove 43 are arranged separately on the left and right sides with the rotation axis AR therebetween in a rear view.

[0109] In this case, the shapes of the front grooves 42a and 43a are line-symmetrical with respect to the rotation axis AR as the center line. Therefore, when the folding bag is virtually folded using the rotation axis AR as a folding line, the front grooves 42a and 43a overlap and match. Similarly, the shapes of the back grooves 42b and 43b are line-symmetrical with respect to the rotation axis AR as the center line. Therefore, when the folding bag is virtually folded using the rotation axis AR as a folding line, the front grooves 42a and 43a overlap and match.

[0110] Fastener 3 according to the embodiment of the present invention having the above configuration is provided with head 40 having grooves 42 and 43, and therefore a turning jig connected to a hook as an object can turn fastener 3 while holding it in a stable state with good workability. In particular, even if the turning jig is rotated at a relatively high speed using a drive motor such as an electric drill, the turning jig can rotate fastener 3 while holding it in a stable state.

[0111] (operation) The configuration of the groove portions 42 and 43 of the head portion 40 of the fastener 3 corresponds to the configuration of the groove portions 22 and 23 of the main body portion 21 of the rotating jig 1, and the state in which the hook of the rotating jig and the fastener 3 are combined corresponds to the state in which the hook portion 20 of the rotating jig 1 and the eyebolt 100 are combined.

[0112] That is, the operation of attaching and detaching the fastener 3 to and from the fastening object by the turning jig is performed based on the same action as the operation of attaching and detaching the eyebolt 100 by the turning jig 1 described with reference to FIGS.

[0113] Therefore, in the fastener 3 according to the embodiment of the present invention, by providing a head 40 having grooves 42 and 43, when an object such as a hook of a rotating jig is fitted into grooves 42 and 43, movement is restricted in both the up-down direction along the rotation axis AR of the fastener 3, and the left-right and front-to-back directions perpendicular to the rotation axis AR, and the object can be rotated while being held in a stable state.

[0114] Furthermore, in the fastener 3 according to the embodiment of the present invention, as with conventional turning jigs, the hook and head 40 of the fastener 3 are combined by inserting the hook into the gap CL and hooking it onto the head 40. The hook can be inserted from any side that intersects with the direction of the turning axis of the fastener 3, allowing for good visibility. In addition, the front shape and dimensions of the gap CL are larger than the shape and dimensions of the tip of the hook, ensuring a large margin for alignment accuracy. These features make it easy to combine the turning jig and fastener 3 without impairing workability.

[0115] Therefore, according to the fastener 3 of the embodiment of the present invention, it is possible to hold and rotate an object such as the hook of a rotating jig while the fastener 3 is held in a stable manner with good workability.

[0116] (Position and shape of groove) The configuration of the grooves 42 and 43 of the head 40 of the fastener 3 corresponds to the configuration of the grooves 22 and 23 of the body 21 of the rotating jig 1.

[0117] That is, it has been stated that the shapes in plan view of the front groove 42a and the back groove 42b of groove portion 42 and the front groove 43a and the back groove 43b of groove portion 43 are preferably formed based on the relationship between the hook as the object and head portion 40, but specifically, the positions and shapes of groove portions 42 and 43 are preferably determined similarly to the positions and shapes of groove portions 22 and 23 of main body portion 21 of hook portion 20, as explained with reference to Figures 14 and 15. Furthermore, the positions and shapes of groove portions 42 and 43 of head portion 40 may also be made different, similar to the positions and shapes of groove portions 22 and 23 of main body portion 21 of hook portion 20.

[0118] (3. Remote Control Device) A remote control device 2, which is an example of a remote control device according to an embodiment of the present invention, will be described below. Fig. 16 is a perspective view showing the remote control device 2 according to an embodiment of the present invention.

[0119] The remote control device 2 is an example of a tool that cooperates with the rotating jig 1. The remote control device 2 includes a tie stick 210 and a connecting portion 211.

[0120] The tie stick 210 is a rod-shaped part made up of a plurality of connected members, with one end facing the hand and being operable by the operator.

[0121] The connecting portion 211 is a portion that is attached to the shank portion 10 of the turning jig 1, and integrates the remote control device 2 and the turning jig 1 together.

[0122] Such a remote control device 2 can rotate the rotating jig 1 by operating the tie stick 210, thereby performing the above-mentioned rotating operation.

[0123] An example of a use of the remote control device 2 is to adjust wire grippers and wire tensioners used in the construction of electric wires, wires, etc. That is, wire grippers and wire tensioners are provided with an eye ring with a circular planar shape on the head to adjust the opening and angle, and by operating the eye ring using the rotating jig 1 as the tip of the remote control device 2, it becomes possible to hold and adjust the opening and angle of these wire grippers and wire tensioners in a stable state with good workability.

[0124] In addition, the tools that work in conjunction with the rotating jig 1 may be any tool or equipment, including well-known and commonly used ones, as long as they have the function of attaching the shank portion 10 and rotating the hook portion 20, such as a chuck on a rotary tool.

[0125] (4. Modifications) In the rotating jig 1 according to the embodiment of the present invention, the hook portion 20 has two sets of grooves, namely, groove portion 22 and groove portion 23, but it may alternatively have either one set of groove portion 22 or groove portion 23.

[0126] In this case, it is preferable to select groove 22 or groove 23 depending on the intended use of the object. That is, when the rotation of the object by turning jig 1 is intended only for the fastening operation, it is preferable to form groove 22 or groove 23 on the front surface 21a or rear surface 21b of hook portion 20, on the side facing the object in the rotation direction corresponding to the fastening of the object. Similarly, when the rotation of the object by turning jig 1 is intended only for the release of the fastening operation, it is preferable to form groove 22 or groove 23 only on the side facing the object in the rotation direction corresponding to the release of the fastening, on the front surface 21a or rear surface 21b.

[0127] In the rotating jig 1 according to an embodiment of the present invention, the hook portion 20 has a main body 21 with a portion of its approximately annular outer shape cut out, thereby forming an approximately C-shaped outer shape when viewed from the front or back, but the hook portion 20 may have any outer shape, such as an oval, rectangle, or the like, as long as it is capable of hooking an object from the tip.

[0128] In the rotating jig 1 according to the embodiment of the present invention, the object to be rotated by the rotating jig 1 is mainly an eyebolt, such as eyebolt 100, but the object may be anything that is hooked on hook portion 20, rotates following the rotation of the rotating jig 1, and can be fitted into groove portion 22 or groove portion 23 during rotation. Therefore, the object may be a mechanical element or fastener having any purpose or use, including an eye nut or the above-mentioned eye ring.

[0129] Furthermore, in the fastener 3 according to the embodiment of the present invention, the head 40 has two sets of grooves, namely, groove 42 and groove 43, but it may alternatively have either one set of grooves 42 or groove 43.

[0130] In this case, it is preferable to select groove 42 or groove 43 depending on the object to be fastened. That is, when the rotation of the hook of the rotating jig as the object is intended only for fastening operation, it is preferable to form groove 42 or groove 43 on the side of front part 41 a or back part 41 b of head part 40 that faces the object in the rotation direction corresponding to fastening by the object.

[0131] In the fastener 3 according to the embodiment of the present invention, the head 40 has a circular outer shape together with the connection end 32 of the threaded portion 30, but the head 40 may have any outer shape, such as an oval, elliptical, rectangular, or the like, as long as it is a circular shape that can be hooked by a hook.

[0132] In the fastener 3 according to the embodiment of the present invention, an eyebolt is used as an example of the fastener 3, but the fastener may be anything that is hooked onto the hook of a rotating jig as an object, rotates following the rotation of the rotating jig, and can be fitted into groove 22 or groove 23 during rotation. Therefore, the fastener may be an eyebolt or an eye nut, or any other mechanical element or fastener having any purpose or use.

[0133] Furthermore, although the fastening rotating body according to the embodiment of the present invention is described as the rotating jig 1 or the fastening device 3, the fastening rotating body of the present invention may be any other tool or machine element having any purpose or use, as long as it has a shaft portion that can be rotated by an external force applied from one end, and a hook portion provided on the other end of the shaft portion that hooks onto a predetermined object, and rotates in response to the rotational force applied from the object to the shaft portion.

[0134] As described above, the embodiment of the present invention has been disclosed in the above description, but the present invention is not limited to this.

[0135] In other words, various modifications can be made to the above-described embodiments and variants in terms of mechanism, shape, material, quantity, position, arrangement, etc., without departing from the scope of the technical idea and purpose of this invention, and such modifications are included in this invention. [Explanation of symbols]

[0136] 1 Rotating jig 2 Remote control devices 3 Fasteners 10 Shank 10a, 30a tip 10b, 32 connection end 20 Hook part 21a, 41a Front part 21b, 41b Rear part 21B Base end 21T tip 21 Main body 22, 23, 42, 43 Groove 22a, 23a, 42a, 43a Front groove 22b, 23b, 42b, 43b Rear groove 22a1, 22a2, 22b1, 22b2, 23a1, 23a2, 23b1, 23b2, 42a1, 42a2, 42b1, 42b2, 43a1, 43a2, 43b1, 43b2 Edge 30 Threaded portion 31 Male thread 40, 120 heads 100 eyebolts 110 volt body 120a, 120b end 120a1, 120a2, 120b1, 120b2 surface 120x aperture 200 pedestals 210 Thai Stick 211 Connection

Claims

1. a shaft portion that can be rotated by an external force applied from one end side; a hook portion provided on the other end of the shaft portion, the hook portion contacting an inner surface of a predetermined object having a closed or partially cut-out annular outer shape to hook onto the object, A fastening rotating body that rotates around a central axis of the shaft portion as a rotation axis in response to a rotation force applied to the shaft portion from the object, the hooking portion has at least one set of grooves formed rotationally symmetrically with respect to the rotation axis in accordance with the shape of the object in a front view and a plan view, on a surface that interferes with the object, which rotates following the hooking portion when the object is rotated in a hooked state; any one of the at least one set of groove portions simultaneously interferes with the object when the hook portion rotates while hooking the object; Rotating body for fastening.

2. the groove portion includes at least one pair of a front groove located on one side of a plane including the rotation axis of the shaft portion and a back groove located on the other side of the plane, The front groove and the rear groove of the groove portion are arranged with the rotation axis of the shaft portion sandwiched therebetween. The fastening rotary element according to claim 1 .

3. The groove portion includes two pairs of the front groove and the rear groove, The front groove of one of the two sets of groove portions and the front groove of the other of the two sets of groove portions are arranged on one surface side of the flat surface with the rotation axis of the shaft portion sandwiched therebetween, The rear groove of one of the two sets of groove portions and the rear groove of the other of the two sets of groove portions are arranged on the other side of the plane with the rotation axis of the shaft portion sandwiched therebetween. The fastening rotary body according to claim 2 .

4. The arrangement of the front groove and the rear groove of the groove portion is symmetrical with respect to the rotation axis of the shaft portion. The fastening rotary element according to claim 2 or 3.

5. The shape of the front groove and the shape of the back groove of the groove portion are symmetrical with respect to the rotation axis of the shaft portion when viewed from a direction perpendicular to the plane. The fastening rotary element according to claim 2 or 3.

6. The front groove and the rear groove in the set of grooves are curved in a substantially arc shape convex in a direction away from the rotation axis of the shaft portion when viewed from a direction perpendicular to the plane. The fastening rotary element according to claim 2 or 3.

7. The shaft portion serves as a shank portion that can be detachably coupled to a machine or tool that generates a rotational force, The catch portion functions as a hook portion for hooking the object from the tip thereof, It acts as a rotating jig that rotates the object in response to the rotation force applied to the shank portion. The fastening rotary element according to claim 1 .

8. a fastening rotary body acting as the rotating jig according to claim 7; A connection portion connected to one end side of the shaft portion, which serves as the shank portion. Remote control device.

9. the shaft portion has either a male thread formed on an outer peripheral surface or a female thread formed on an inner peripheral surface, and serves as a threaded engagement portion that is threadedly engaged with an object to be fixed; The hook portion serves as a ring-shaped head that is hooked onto the object, which is a hook; The fixing device functions as a fixing tool that is screwed onto the fixing object in response to a rotational force from the object. The fastening rotary element according to claim 1 .

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