Fastening rotary 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] The present invention relates to a rotation jig for rotating a fastening part such as an eyebolt, other mechanical elements mainly having an annular head, or a fixture, and a fastening rotating body that can be implemented as a fastening part such as an eyebolt, other mechanical elements mainly having an annular head, or a fixture that is rotated by a general rotation jig.

Background Art

[0002] Conventionally, various techniques have been proposed for efficiently fastening an eyebolt used for a suspension tool such as a rope or a towing hook.

[0003] As an example, Patent Document 1 discloses an eyebolt rotation jig used by being attached to a power tool, which includes two side wall members forming a fitting groove that fits with the annular head of the eyebolt and a shaft member that fits with the rotating part of the power tool and is rotationally driven.

[0004] Further, Patent Document 2 discloses an eyebolt mounting jig that can efficiently fasten eyebolts of different sizes. The mounting jig has a mounting shaft portion that can be inserted into the chuck of a rotary tool and is joined to the same central axis. A plurality of pairs of grooves are provided at positions symmetric with respect to the central axis of the socket portion having a cylindrical shape, corresponding to the shapes of the ring-shaped heads of a plurality of types of eyebolts.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In these jigs in the above-described conventional technology, the annular head of the eye bolt is fitted into the fitting groove or the groove so as to sandwich the head from the outside thereof. However, since the fitting between the eye bolt and the jig is in a state where it can be freely positioned along the axial direction, there is a risk that the jig may come off, and it is difficult to fasten the eye bolt in a stable state. Further, alignment for fitting the jig to the eye bolt requires aligning the head of the eye bolt and the jig on a straight line along the rotational direction of the eye bolt, which requires high precision and impairs workability.

[0007] Therefore, the main object of the present invention is to be implemented as a rotating jig that can hold and rotate an object such as a fastening part like an eye bolt, other mechanical elements having an annular head, or a fixture in a stable state with good workability, or as a fastening rotating body that can be implemented as a fastening part like an eye bolt rotated by a general rotating jig, other mechanical elements mainly having an annular head, or a fixture.

Means for Solving the Problems

[0008] A first aspect of the present invention is a fastening rotating body that includes a shaft portion that can be rotated by an external force applied from one end side, and a catching portion provided on the other end side of the shaft portion that catches on a predetermined object, and that rotates following the rotational force applied from the object to the shaft portion. The catching portion has a groove portion formed along the surface shape of the object on a surface facing the object that rotates following the catching portion when the object is caught and rotated. A second aspect of the present invention is the fastening rotating body according to the first aspect of the present invention, wherein the groove portion includes at least one set of a front groove located on the surface side of a plane including the rotation axis of the shaft portion and a back groove located on the back 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 interposed therebetween. The third invention is a rotation body for fastening according to the second invention, wherein the groove portion includes two sets of the front groove and the rear groove, and one front groove of the two sets of groove portions and the other front groove of the two sets of groove portions are arranged with the rotation axis of the shaft portion interposed therebetween on the front surface side of the plane, and one rear groove of the two sets of groove portions and the other rear groove of the two sets of groove portions are arranged with the rotation axis of the shaft portion interposed therebetween on the back surface side of the plane. The fourth invention is a rotation body for fastening according to the second or third invention, wherein the arrangement of the front groove and the rear groove of the groove portion is line-symmetric with respect to the rotation axis of the shaft portion. The fifth invention is a rotation body for fastening according to the second or third invention, wherein the shape of the front groove and the shape of the rear groove of the groove portion are bilaterally symmetric with respect to the rotation axis of the shaft portion from the viewpoint in the direction perpendicular to the plane. The sixth invention is a rotation body for fastening according to the second or third invention, wherein the front groove and the rear groove in the set of groove portions are curved convexly in a direction away from the rotation axis of the shaft portion from the viewpoint in the direction perpendicular to the plane. The seventh invention is a rotation body for fastening according to the first invention, wherein the shaft portion functions as a shank portion detachably coupled to a machine or instrument that generates a rotational force, the engaging portion functions as a hook portion that hooks the object from the tip, and the object functions as a rotation jig that rotates following the rotational force applied to the shank portion. The eighth invention is a remote control tool including the rotation body for fastening that functions as the rotation jig according to the first invention and a connection portion connected to one end side of the shaft portion that functions as the shank portion. The ninth invention is a rotation body for fastening according to the first invention, wherein the shaft portion has either a male thread formed on the outer peripheral surface or a female thread formed on the inner peripheral surface and functions as a screwing portion that screws into a fixing target, the engaging portion functions as an annular head that is hooked by the object that is a hook, and the object functions as a fixing tool that is fixed to the fixing target by screwing following the rotational force from the object.

Advantages of the Invention

[0009] According to the rotating body for fastening of the present invention, a fastening part such as an eye bolt, other mechanical elements having an annular head, or a fixture can be used as an object, or a fastening part such as an eye bolt, other mechanical elements having an annular head, or the fixture itself can be held and rotated in a stable state with good workability.

[0010] The above object, other objects, features, and advantages of the present invention will become more apparent from the following description of the embodiments for carrying out the invention with reference to the drawings.

Brief Description of the Drawings

[0011]

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Mode for Carrying Out the Invention

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

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

[0014] The rotating jig 1 rotates in cooperation with a rotating tool or other instruments (hereinafter referred to as instruments) not shown, and is an instrument for driving an object such as an eyebolt to rotate the object. The rotating jig 1 includes a shank portion 10 and a hook portion 20.

[0015] (Shank portion) The shank portion 10 is a part that connects the instruments and the hook portion 20 and transmits the torque from the instruments to the hook portion 20. The shank portion 10 has a columnar outer shape with a circular, oval, or elliptical cross-sectional shape. The protruding end 10a on one end side is detachably connected to the instruments to receive the torque of the instruments and rotates about the central axis as the rotation axis AR. The connecting end 10b on the other end side of the shank portion 10 is connected to the hook portion 20.

[0016] (Hook portion) The hook portion 20 is an example of the engaging portion of the present invention, and is a part that is hooked on an object and directly transmits the torque from the instruments to the object to rotate it. The hook portion 20 has a body portion 21 with a circular, oval, or elliptical cross-sectional shape and an outer shape curved in a substantially C shape.

[0017] The body portion 21 has a mode in which a part of the substantially annular outer shape is cut out to form a substantially C-shaped outer shape. One end side of the substantially C-shaped body portion 21 forms a tip portion 21T for hooking an object such as an eyebolt, and the other end side forms a base end portion 21B continuous with the shank portion 10. A gap G is formed between the tip portion 21T and the base end portion 21B, and a part of the object hooked by the tip portion 21T passes through the gap G.

[0018] In the rotary jig 1, the shank portion 10 and the hook portion 20 are integrally formed. Thereby, the connection end 10b of the shank portion 10 and the base end portion 21B of the main body portion 21 are formed in a continuous manner without a joint. The rotary jig 1 is preferably formed by precision casting using a metal material such as cast iron, but may be formed by forging or any other means.

[0019] In the following description, in the rotary 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 is defined as the upper side, the side where the tip portion 21T of the hook portion 20 is located is defined as the left side, and the side between the tip portion 21T and the base end portion 21B of the hook portion 20 is defined as the right side. Thereby, the direction parallel to the rotation axis AR of the shank portion 10 is the vertical direction, the direction connecting the left and right sides of the hook portion 20 is the horizontal direction, and the direction orthogonal to these directions is the front-rear direction.

[0020] Based on this, FIG. 3 is shown as a front view representing the front side of the rotary jig 1, FIG. 4 is shown as a rear view representing the rear side of the rotary jig 1, FIG. 5 is shown as a right side view of the rotary jig 1, FIG. 6 is shown as a left side view of the rotary jig 1, and FIG. 7 is shown as a plan view of the rotary 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 X-X in FIG. 3. The following description is based on the above definition of directions and reference to the orthogonal coordinates shown in each figure.

[0021] For example, the substantially C-shaped outer shape of the main body portion 21 of the hook portion 20 is the shape as viewed from the rear, as shown in FIG. 4. Further, the main body portion 21 includes a front portion 21a located on the front surface side of a virtual 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 rear portion 21b located on the rear surface side of the plane P. In the perspective views of FIGS. 1 and 4, the boundary between the front portion 21a and the rear portion 21b by the plane P is indicated by a dashed line.

[0022] Note that, as shown in FIGS. 3 and 4, since the rotation axis AR of the shank portion 10 and the center C of the hook portion 20 overlap in the front-rear direction and have an offset in the left-right direction, in the rotation jig 1, the hook portion 20 rotates eccentrically with respect to the rotation of the shank portion 10. However, when the value of the offset 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 substantially coaxially arranged, and it may be considered that the hook portion 20 rotates without eccentricity with respect to the rotation of the shank portion 10. Further, the rotation axis AR and the center C may be configured to be completely coaxially arranged.

[0023] (Groove portion) The hook portion 20 has groove portions 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 on the front surface portion 21a of the main body portion 21 and a rear groove 22b formed on the rear surface portion 21b of the main body portion 21.

[0025] The front groove 22a is arranged on the left side with respect to the rotation axis AR in a front view. Also, the rear groove 22b is also arranged on the left side with respect to the rotation axis AR in a rear view. In other words, as shown in FIGS. 3 and 4, in the main body portion 21, the arrangements of the front groove 22a and the rear groove 22b form line symmetry with the rotation axis AR as the center line on the projection plane including the front and the rear.

[0026] As particularly shown in FIG. 3, the front groove 22a extends in an obliquely intersecting direction from the vicinity of the top portion of the main body portion 21 over the center C of the hook portion 20 to the vicinity of the tip portion 21T, and has a substantially arc-shaped shape in a front view, in which the central portion is convex in the leftward direction, that is, away from the rotation axis AR, in a front view compared to both the upper and lower ends. This shape of the front groove 22a is preferably formed based on the relationship between the hook portion 20 and the head of the eyebolt as an object to be described later.

[0027] Furthermore, as shown in each of FIGS. 8 to 10, the front groove 22a changes in position and cross-sectional shape in the main body portion 21 along the vertical direction. Specifically, the front groove 22a moves from the vicinity of the top portion of the main body portion 21 to the vicinity of the tip portion 21T along the outer periphery of the main body portion 21 from right to left. Furthermore, the front groove 22a has an arcuate contour with a concave cross-section, and the width and depth gradually increase from the vicinity of the top portion of the main body portion 21 to the central portion, and the width and depth gradually decrease from the central portion to the vicinity of the tip portion 21T.

[0028] As shown in FIGS. 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 having the edge portions 22a1 and 22a2, it is possible to prevent the outer edge of an object such as an eyebolt from coming off the rotation jig 1 beyond the edge portions 22a1 and 22a2 when the rotation jig 1 rotates.

[0029] As particularly shown in FIG. 4, the back groove 22b extends in an obliquely intersecting direction from the vicinity of the top portion of the main body portion 21 over the center C of the hook portion 20 to the vicinity of the opposing position with the tip portion 21T, and has a substantially arc-shaped shape in a rear view, with the central portion curved convexly to the left in a rear view, that is, in a direction away from the rotation axis AR, compared to both upper and lower ends. This shape of the back groove 22b is preferably formed based on the relationship between the hook portion 20 and the head of an eyebolt as an object to be described later.

[0030] Furthermore, as shown in each of FIGS. 8 to 10, the back groove 22b changes in position and cross-sectional shape in the main body portion 21 along the vertical direction. Specifically, the back groove 22b moves from the vicinity of the top portion of the main body portion 21 to the vicinity of the opposing position with the tip portion 21T along the outer periphery of the main body portion 21 from left to right. Furthermore, the back groove 22b has an arcuate contour with a concave cross-section, and the width and depth gradually increase from the vicinity of the top portion of the main body portion 21 to the central portion, and the width and depth gradually decrease from the central portion to the vicinity of the opposing position with the tip portion 21T.

[0031] As shown in FIGS. 2 and 4, the back groove 22b has edge portions 22b1 and 22b2 located at both outer edges of the back groove 22b. As shown in FIG. 9, the edge portions 22b1 and 22b2 protrude. By having the edge portions 22b1 and 22b2, when the rotating jig 1 rotates, it is possible to prevent the outer edge of an object such as an eyebolt from coming off the rotating jig 1 beyond the edge portions 22b1 and 22b2.

[0032] The groove portion 23 is a combination 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 arranged on the right side with respect to the rotation axis AR in a front view. Also, the back groove 23b is arranged on the right side with respect to the rotation axis AR in a rear view. In other words, as shown in FIGS. 3 and 4, in the main body portion 21, the arrangements of the front groove 23a and the back groove 23b are line-symmetric with the rotation axis AR as the center line on the projection plane including the front and the back.

[0034] As particularly shown in FIG. 3, the front groove 23a extends in an obliquely intersecting direction from the vicinity of the top portion of the main body portion 21 over the center C of the hook portion 20 to the vicinity of the opposing position with the tip portion 21T, and has a substantially arc-shaped appearance in a front view with the central portion curved convexly to the right, that is, away from the rotation axis AR, in a front view compared to both upper and lower ends. This shape of the front groove 23a is preferably formed based on the relationship between the hook portion 20 and the head of an eyebolt as an object to be described later.

[0035] Furthermore, as shown in each of FIGS. 8 to 10, the front groove 23a changes in position and cross-sectional shape in the main body portion 21 along the vertical direction of the main body portion 21. Specifically, the front groove 23a moves from left to right along the outer periphery of the main body portion 21 from the vicinity of the top portion of the main body portion 21 to the vicinity of the opposing position with the tip portion 21T. Furthermore, the front groove 23a has a contour in the shape of an arc curved concavely in cross-section, and the width and depth gradually increase from the vicinity of the top portion of the main body portion 21 to the central portion, and gradually decrease from the central portion to the vicinity of the opposing position with the tip portion 21T.

[0036] As shown in FIGS. 1 and 3, the front groove 23a has edge portions 23a1 and 23a2 located at both outer edges of the front groove 23a. As shown in FIG. 9, the edge portions 23a1 and 23a2 protrude. By having the edge portions 23a1 and 23a2, when the rotation jig 1 rotates, it is possible to prevent the outer edge of an object such as an eyebolt from coming off the rotation jig 1 beyond the edge portions 23a1 and 23a2.

[0037] As particularly shown in FIG. 4, the rear groove 23b extends obliquely from near the top portion of the main body portion 21 over the center C of the hook portion 20 to near the tip portion 21T, and has a substantially arc-shaped appearance in front view with the central portion curved convexly to the right in a rear view, that is, in a direction away from the rotation axis AR, compared to both upper and lower ends. This shape of the rear groove 23b is preferably formed based on the relationship between the hook portion 20 and the head of an eyebolt as an object to be described later.

[0038] Furthermore, as shown in each of FIGS. 8 to 10, the rear groove 23b changes in position and cross-sectional shape along the vertical direction of the main body portion 21. Specifically, the rear groove 23b moves from right to left along the outer periphery of the main body portion 21 from near the top portion of the main body portion 21 to near the tip portion 21T. Furthermore, the rear groove 23b has an arcuate contour with a concave cross-section, and the width and depth gradually increase from near the top portion of the main body portion 21 to the central portion, and gradually decrease from the central portion to near the tip portion 21T.

[0039] As shown in FIGS. 2 and 4, the rear groove 23b has edge portions 23b1 and 23b2 located at both outer edges of the rear groove 23b. As shown in FIG. 9, the edge portions 23b1 and 23b2 protrude. By having the edge portions 23b1 and 23b2, when the rotation jig 1 rotates, it is possible to prevent the outer edge of an object such as an eyebolt from coming off the rotation jig 1 beyond the edge portions 23b1 and 23b2.

[0040] Furthermore, in the main body 21, the arrangements of the groove portion 22 and the groove portion 23 are line-symmetric with the rotation axis AR as the center line. As a result, as shown in FIG. 3, in a front view, the front groove 22a of the groove portion 22 and the front groove 23a of the groove portion 23 are separated and arranged on the left and right sides with the rotation axis AR in between. Similarly, as shown in FIG. 4, in a rear view, the rear groove 22b of the groove portion 22 and the rear groove 23b of the groove portion 23 are separated and arranged on the left and right sides with the rotation axis AR in between.

[0041] In this case, the shape of the front groove 22a and the shape of the front groove 23a are line-symmetric with the rotation axis AR as the center line. Therefore, when the rotation axis AR is virtually folded as a broken line, the front groove 22a and the front groove 23a overlap and coincide. Similarly, the shape of the rear groove 22b and the shape of the rear groove 23b are line-symmetric with the rotation axis AR as the center line. Therefore, when the rotation axis AR is virtually folded as a broken line, the front groove 22a and the front groove 23a overlap and coincide.

[0042] The rotation jig 1 according to the embodiment of the present invention having the above configuration includes the hook portion 20 having the groove portion 22 and the groove portion 23, and thus holds and rotates the object in a stable state with good workability. In particular, for example, even when the rotation jig 1 is rotated relatively rapidly using a drive motor such as an electric drill in order to rotate the rotation jig 1, the present rotation jig 1 can rotate while holding the object in a stable state.

[0043] (Operation) Hereinafter, with reference to FIGS. 11 to 13, the operation of the rotation jig 1 will be described. In this operation description, the eye bolt 100 is screwed into the pedestal 200, and the operation of detaching and attaching the eye bolt 100 will be described.

[0044] FIG. 11 is a perspective view schematically showing a state in which the eye bolt 100, which is an object to be operated by the jig 1, and the rotation jig 1 are combined. FIGS. 12 and 13 are explanatory views corresponding to a cross section corresponding to FIG. 9 when the rotation jig 1 is operated in the state of FIG. 11.

[0045] As shown in FIG. 11, the eyebolt 100 that is the object of the rotation jig 1 has a bolt body 110 that is screwed into the pedestal 200 and a head 120 that is integrally formed with the end of the bolt body 110.

[0046] The bolt body 110 has a right-handed thread and approaches the pedestal 200 by rotating clockwise (in the clockwise direction) when viewed from the head 120, and separates from the pedestal 200 by rotating counterclockwise (in the counterclockwise direction).

[0047] The head 120 has an annular outer shape without a break 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 mode in which the head 120 protrudes downward in the vertical direction in a state where it is screwed into the pedestal 200.

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

[0050] (When approaching) The operation of approaching the eyebolt 100 to the pedestal 200 is performed by rotating the rotation jig 1 with the hook portion 20 hooked on the head 120 counterclockwise (clockwise when viewed from the head 120) as shown by the white arrow in FIG. 12 when viewed from above. That is, the hook portion 20 of the rotation jig 1 interferes with and presses both ends of the head 120 of the eyebolt 100 from directions in which the front portion 21a and the rear portion 21b of the main body portion 21 are opposite to each other across the rotation axis AR of the hook portion 20, so that the eyebolt 100 is driven and rotated in the same direction as the hook portion 20.

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

[0052] Furthermore, as shown in FIG. 11, when the surface 120a2 of the head 120 is fitted into the front groove 22a, the movement in the vertical and horizontal directions is restricted. Also, the surface 120b1 of the head 120 located in the blind spot in FIG. 11 is fitted into the rear groove 22b of the hook portion 20, and the movement in the vertical and horizontal directions is restricted.

[0053] Thus, when the eyebolt 100 is driven by the rotation of the rotation jig 1, the hook portion 20 and the head 120 are in surface contact, and the movement in the vertical and horizontal directions is restricted from each other within the groove portion 22 and the groove portion 23.

[0054] As shown in FIG. 3, taking the center line O of the substantially C shape of the main body portion 21 of the hook portion 20, in the front groove 22a, when the intersection of the center line O and the edge portion 22a1 is P1 and the intersection of the center line O and the edge portion 22a2 is P2, the linear distance between the intersection P1 and the intersection P2 is defined as the width w1 of the front groove 22a. Then, as shown in FIG. 12, the width w2 of the surface 120a2 and the surface 120b1 of the eyebolt 100 is defined. At this time, it is preferable to satisfy the condition of 0.8 ≦ w2 / w1 ≦ 1.0. Thereby, the eyebolt 100 can be stably held by the front groove 22a. As a result, the head 120 of the eyebolt 100 can be stably fitted. Note that such a relationship of w2 / w1 is the same for the rear groove 22b, the front groove 23a, and the rear groove 22b.

[0055] Also, as shown in FIGS. 4 and 12, taking the substantially C-shaped center line O of the main body portion 21 of the hook portion 20, in the back groove 22b, when the intersection point of the center line O and the edge portion 22b1 is P3 and the intersection point of the center line O and the edge portion 22b2 is P4, the vertical distance from the straight line connecting the intersection point P3 and the intersection point P4 to the lowest point of the back groove 22b is defined as the depth t1 of the back groove 22b, and the thickness t2 of the head portion 120 of the eye bolt 100. At this time, it is preferable to satisfy the condition of 2.6 ≦ t2 / t1 ≦ 3.3. Thereby, the eye bolt 100 can be stably held by the back groove 22b. As a result, it becomes possible to stably fit the head portion 120 of the eye bolt 100. Note that such a relationship of t2 / t1 is the same for the front groove 22a, the front groove 23a, and the back groove 22b.

[0056] (When separated) The operation of separating the eye bolt 100 from the pedestal 200 is performed by rotating the rotation jig 1 with the hook portion 20 hooked on the head portion 120 clockwise (counterclockwise as viewed from the head portion 120) as shown by the white arrow in FIG. 13 when viewed from above. That is, the hook portion 20 of the rotation jig 1 interferes with and presses both ends of the head portion 120 of the eye bolt 100 from opposite directions in which the front portion 21a and the back portion 21b of the main body portion 21 are opposite to each other across the rotation axis AR of the hook portion 20, thereby driving the eye bolt 100.

[0057] At this time, on the surface 120a1 of the head portion 120 of the eye bolt 100 that faces the back portion 21b of the main body portion 21, it fits into the front groove 23a formed in the front portion 21a. On the other hand, the surface 120b2 that faces the back portion 21b of the main body portion 21 fits into the back groove 23b formed in the back portion 21b.

[0058] Furthermore, similar to the fastening state, on the head portion 120, with the surface 120b2 fitting into the back groove 23b and the surface 120a1 fitting into the front groove 23a, the movement in the vertical and horizontal directions is restricted in the front view or the back view.

[0059] Accordingly, when the eyebolt 100 is driven by the rotation of the rotation jig 1, the hook portion 20 and the head portion 120 are in surface contact, and a state in which the vertical and horizontal movements in the groove portion 22 and the groove portion 23 are restricted from each other is maintained.

[0060] Note that the width of the groove portion 23 is preferably 80% or more of the widths of the surface 120b2 and the surface 120a1. Thereby, it becomes possible to satisfactorily fit the head portion 120 of the eyebolt 100. Further, the depth of the groove portion 22 is preferably 20% or more at the maximum with respect to the thickness of the head portion 120 of the eyebolt 100. Thereby, it becomes possible to stably fit the head portion 120 of the eyebolt 100.

[0061] As described above, in the rotation jig 1 according to the embodiment of the present invention, by providing the hook portion 20 having the groove portion 22 and the groove portion 23, an object such as the eyebolt 100 is fitted into the groove portion 22 and the groove portion 23, and the vertical direction along the rotation axis AR of the rotation jig 1, and the left-right direction and the front-rear direction orthogonal to the rotation axis AR are restricted from moving along any of them, and it can be rotated while being held in a stable state.

[0062] Furthermore, in the rotation jig 1 according to the embodiment of the present invention, the combination of the hook portion 20 and the head portion 120 of the eyebolt 100 is performed by hooking the hook portion 20 on the head portion 120 by inserting the tip portion 21T of the hook portion 20 into the opening 120x. Since the insertion of the tip portion 21T can be performed from an arbitrary side surface intersecting the rotation axis direction of the eyebolt 100, it can be performed in a state with good visibility. In addition, since the front shape and dimensions of the opening 120x are larger than the shape and dimensions of the tip portion 21T of the hook portion 20, a large margin is ensured for the alignment accuracy. As a result, the combination of the rotation jig 1 and the eyebolt 100 can be performed more simply, and the workability is improved.

[0063] Therefore, according to the rotating jig 1 according to the embodiment of the present invention, it is possible to hold and rotate an object such as an eyebolt in a stable state with good workability.

[0064] (Position and shape of the groove portion) Although it is preferable that the planar shapes of the front groove 22a and the rear groove 22b of the groove portion 22 and the front groove 23a and the rear groove 23b of the groove portion 23 are formed based on the relationship between the hook portion 20 and the head portion 120 of the eyebolt 100 as the object, specifically, the positions and shapes of the groove portion 22 and the groove portion 23 are preferably determined as follows.

[0065] Hereinafter, the groove portion 22 will be described as an example. FIG. 14 is an explanatory view corresponding to a cross section corresponding to FIG. 10, schematically showing a state in which the hook portion 20 of the rotating jig 1 and the head portion 120 of the eyebolt 100 are combined. FIG. 15 is an explanatory view corresponding to the front view of FIG. 3, schematically showing a state in which the hook portion 20 of the rotating jig 1 and the head portion 120 of the eyebolt 100 are combined.

[0066] As shown in FIG. 14, the front portion 21a of the hook portion 20 includes a surface Oa facing one end portion 120a of the head portion 120 of the eyebolt 100, and the rear portion 21b of the hook portion 20 includes a surface Ob facing the other end portion 120b of the head portion 120 of the eyebolt 100. The surfaces Oa and Ob are such that the positions and dimensions (widths) in the left-right direction in each of the front portion 21a and the rear portion 21b change continuously in the vertical direction, that is, along the rotation axis AR, and the changes in the surfaces Oa and Ob along this rotation axis AR give the shapes of the groove portion 22 in the front view and the rear view.

[0067] Here, the modes of change in the horizontal position and width of each of the surfaces Oa and Ob are defined based on the positions, shapes, and combination modes of the hook portion 20 and the head portion 120 of the eyebolt 100. Specifically, as shown in FIG. 15, in the combination of the hook portion 20 and the head portion 120 of the eyebolt 100, the center C of the hook portion 20 is offset downward from the center CI of the head portion 120 of the eyebolt 100. Also, the outer diameter of the hook portion 20 is larger than the outer diameter of the head portion 120.

[0068] As a result, when the hook portion 20 rotates, the surface where the hook portion 20 and the head portion 120 of the eyebolt 100 overlap in a front view is obtained as a surface Oa that is convexly curved in a direction away from the rotation axis AR. Similarly, the surface where the hook portion 20 and the head portion 120 of the eyebolt 100 overlap in a rear view is obtained as a surface Ob that is convexly curved in a 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 rear groove 22b along the surface Ob in the rear portion 21b, the hook portion 20 is combined with the head portion 120 of the eyebolt 100, and when the hook portion 20 is rotated counterclockwise as viewed from above, a state can be obtained in which the head portion 120 of the eyebolt 100 is always fitted into each of the front groove 22a and the rear groove 22b.

[0070] The cross-sections of the front groove 22a and the rear groove 22b preferably have a concave-curved arc-shaped contour. Also, the cross-sections of the front groove 22a and the rear groove 22b may have a flat portion in a part thereof. Specifically, as shown in FIG. 14, it is more preferable that they correspond to the shape of the cross-section of the head portion 120 of the eyebolt 100. Also, the depth of the groove portion 22 may be made different according to the positions on the surfaces Oa and Ob as shown in FIGS. 8 to 10, or may be the same dimension at any position.

[0071] Similarly, when obtaining the groove portion 23, it is as follows. That is, in the combined state shown in FIG. 14, when the hook portion 20 is rotated clockwise as viewed from above with respect to the head portion 120 in the opposite direction of the black arrow in the figure, although not shown, the back surface portion 21b of the hook portion 20 includes the surface facing the other end portion 120b of the head portion 120 of the eyebolt 100, and the front surface portion 21a of the hook portion 20 includes the surface facing the one end portion 120a of the head portion 120 of the eyebolt 100.

[0072] By forming the front groove 23a and the back groove 23b along each of these surfaces, when the hook portion 20 is combined with the head portion 120 of the eyebolt 100 and the hook portion 20 is rotated clockwise as viewed from above, it is possible to obtain a state where the head portion 120 is surely fitted into each of the front groove 23a and the back groove 23b.

[0073] Note that the curvature modes of the surface Oa and the surface Ob may be made different 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 vertices (i.e., the points farthest from the rotation axis AR) of each of the front groove 23a and the back groove 23b can be shifted downward.

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

[0075] Also, 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. Thereby, the positions and shapes of the surface Oa and the surface Ob can be made different asymmetrically with respect to the rotation axis AR in the left - right direction.

[0076] Thereby, according to the type and use of the object to be rotated by the rotation jig 1, the groove portion 22 and the groove portion 23 can be formed in an appropriate shape, and the object can be held and rotated in a stable state with good workability.

[0077] As described above, the groove portions 22 and 23 only need to be formed along the surface shape of the object on the surface facing the object that rotates following the hook portion 20 when the hook portion 20 rotates with an object such as the eyebolt 100 hooked on the tip portion 21T.

[0078] Therefore, in the above description with reference to FIGS. 3 to 13, the arrangement of the front groove 22a and the rear groove 22b in the groove portion 22 of the rotation jig 1 is assumed to be symmetric with respect to the rotation axis AR in the front view or the rear view. However, the front groove 22a and the rear groove 22b only need to be arranged with the rotation axis AR interposed therebetween. Similarly, the arrangement of the front groove 23a and the rear groove 23b in the groove portion 23 only needs to be arranged with the rotation axis AR interposed therebetween in the front view or the rear view.

[0079] However, making each of the arrangements of the front groove 22a and the rear groove 22b and the front groove 23a and the rear groove 23b symmetric with respect to the rotation axis AR can suppress the shaft play of the rotation jig 1 and enable stable rotation, which is more preferable.

[0080] Furthermore, the shapes of the front groove 22a and the rear groove 22b in the groove portion 22 of the rotation jig 1 are assumed to be symmetric with respect to the rotation axis AR in the front view or the rear view. However, they may be asymmetric. Similarly, the shapes of the front groove 23a and the rear groove 23b in the groove portion 23 may be asymmetric with respect to the rotation axis AR in the front view or the rear view.

[0081] However, making each of the shapes of the front groove 22a and the rear groove 22b and the front groove 23a and the rear groove 23b symmetric with respect to the rotation axis AR can suppress the shaft play of the rotation jig 1 and enable stable rotation, which is more preferable.

[0082] (2. Fixing tool) A fixing tool 3, which is an example of the fastening rotating body according to the embodiment of the present invention, will be described. FIGS. 17 and 18 are perspective views showing the fixing tool 3 according to the embodiment of the present invention. The fixing tool 3 is rotated by a rotating jig that rotates in cooperation with tools (not shown) and is fixed to the object to be fixed by fastening. The fixing tool 3 includes a screwing portion 30 and a head portion 40.

[0083] (Screwing portion) The screwing portion 30 is a portion that directly fastens to the object to be fixed by transmitting the torque generated by the rotating jig from the head portion 40. The screwing portion 30 has a cylindrical outer shape, and a male thread 31 is formed on the outer peripheral surface. One end side, the protruding end 30a, of the screwing portion 30 of the fixing tool 3 is fitted into a female thread (not shown) of the object to be fixed, receives the torque of the tools by being rotated by the rotating jig, and rotates about the central axis of the screwing portion 30 as the rotation axis AR to be screwed into the object to be fixed. The connection end 32 on the other end side of the screwing portion 30 is connected to the head portion 40.

[0084] (Head portion) The head portion 40 is an example of the engaging portion of the present invention. It is provided at the tip of the rotating jig, is hooked on a hook as an object, transmits the torque from the tools to the screwing portion 30, and rotates it. The head portion 40 has a cross-sectional shape that is circular, oval, or elliptical, and has an annular outer shape together with the connection end 32 of the screwing portion 30 in a front view.

[0085] The head portion 40 has a circular gap CL in a front view. By inserting a hook into the gap CL, the head portion 40 is hooked on the hook.

[0086] In the fixing tool 3, the screwing portion 30 and the head portion 40 are integrally formed. Thereby, the connection end 32 of the screwing portion 30 and the head portion 40 are formed in a seamless and continuous manner. The fixing tool 3 is preferably formed by precision casting using a metal material such as cast iron, but may be formed by forging or any other means.

[0087] In the following description, in the fixture 3, the side where the screwing portion 30 is located is defined as the lower side, and the side where the head portion 40 is located is defined as the upper side. When viewed from the front, the side where the inclination of the male screw 31 of the head portion 40 is downward is defined as the left side, and the side where the inclination of the male screw 31 is upward is defined as the right side. Thereby, the direction parallel to the rotation axis AR of the screwing portion 30 becomes the vertical direction, the direction connecting the left and right sides of the head portion 40 becomes the horizontal direction, and the direction orthogonal to these directions becomes the front-rear direction.

[0088] Based on this, FIG. 19 is shown as a front view representing the front side of the fixture 3, FIG. 20 is shown as a rear view representing the rear side of the fixture 3, FIG. 21 is shown as a right side view of the fixture 3, FIG. 22 is shown as a left side view of the fixture 3, and FIG. 23 is shown as a plan view of the fixture 3. FIG. 24 is a schematic cross-sectional view taken along line XXIV-XXIV in FIG. 19. The following description is made based on the above definition of directions and reference to the orthogonal coordinates shown in each figure.

[0089] As shown in FIGS. 17 and 18, the head portion 40 includes a front portion 41a located on the front surface side of a virtual plane P that includes the rotation axis AR of the screwing portion 30 and the center C of the head portion 40 and extends in the vertical and horizontal directions, and a back portion 41b located on the back surface 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 by the plane P is indicated by a dashed line.

[0090] Although the center C of the head portion 40 is shown as being located on the rotation axis AR of the screwing portion 30 in the figure, it may overlap in the front-rear direction and have an offset in the left-right direction.

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

[0092] The groove portion 42 is a combination 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 arranged on the left side with respect to the rotation axis AR in a front view. Also, the rear groove 22b is also arranged on the left side with respect to the rotation axis AR in a rear view. In other words, as shown in FIGS. 19 and 20, in the head 40, the arrangements of the front groove 42a and the rear groove 42b form line symmetry with the rotation axis AR as the center line on the projection plane including the front and the rear.

[0094] As particularly shown in FIG. 19, the front groove 42a extends obliquely from the vicinity of the top portion of the head 40 beyond the center C of the head 40 toward the circumferential side, and has a substantially arc-shaped shape in a front view, with the central portion curved convexly to the left, that is, away from the rotation axis AR, in a front view compared to both the upper and lower ends. 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 rotation jig as the object.

[0095] Furthermore, similar to the front groove 22a of the rotation jig 1, the position and cross-sectional shape of the front groove 42a change along the vertical direction of the head 40 in the main body portion 21. Specifically, the front groove 42a moves from right to left along the outer periphery of the head 40 from the upper end to the vicinity of the center C. Furthermore, the front groove 42a has an arc-shaped contour with a concave curvature in the 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.

[0096] As shown in FIGS. 17 and 19, the front groove 42a has edge portions 42a1, 42a2 located at both outer edges of the front groove 42a. The edge portions 42a1, 42a2 protrude as shown in FIG. 24. By having the edge portions 42a1, 42a2, it is possible to prevent the outer edge of the hook of the rotation jig as the object from coming off the fixing tool 3 beyond the edge portions 42a1, 42a2 when the fixing tool 3 rotates.

[0097] As shown particularly in FIG. 20, the rear groove 42b extends obliquely from near the top portion of the head 40 across the center C of the head 40 toward the circumferential side, and has a substantially arcuate shape in a rear view, with the central portion being convexly curved to the left in a front view, i.e., away from the rotation axis AR, relative to both the upper and lower ends. 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 rotation jig as the object.

[0098] Furthermore, similar to the rear groove 22b of the rotation jig 1, the position and cross-sectional shape of the rear groove 42b in the main body portion 21 change along the vertical direction of the head 40. Specifically, the rear groove 42b moves from right to left along the outer periphery of the head 40 from the upper end to the vicinity of the center C. Furthermore, the rear groove 42b has an arcuate contour with a concave 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.

[0099] As shown in FIGS. 18 and 20, the rear groove 42b has edge portions 42b1 and 42b2 located at both outer edges of the rear groove 42b. The edge portions 42b1 and 42b2 protrude as shown in FIG. 24. By having the edge portions 42b1 and 42b2, it is possible to prevent the outer edge of the hook of the rotation jig as the object from coming off the fixing tool 3 beyond the edge portions 42b1 and 42b2 when the fixing tool 3 rotates.

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

[0101] The front groove 43a is arranged on the right side with respect to the rotation axis AR in a front view. Also, the rear groove 43b is arranged on the right side with respect to the rotation axis AR in a rear view. In other words, as shown in FIGS. 19 and 20, in the head 40, the arrangements of the front groove 43a and the rear groove 43b form line symmetry with the rotation axis AR as the center line on the projection plane including the front and rear surfaces.

[0102] As shown particularly in FIG. 19, the front groove 43a extends obliquely from near the top portion of the head 40 across the center C of the head 40 toward the circumferential side, and has a substantially arc-shaped configuration in a front view, with the central portion being convexly curved toward the right in a front view, i.e., away from the rotation axis AR, compared to both the upper and lower ends. 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 rotation jig as the object.

[0103] Furthermore, similar to the front groove 23a of the rotation jig 1, the front groove 43a varies in position and cross-sectional shape along the vertical direction of the head 40 in the main body portion 21. 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 an arcuate contour with a concave cross-section, 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] As shown in FIGS. 17 and 19, the front groove 43a has edge portions 43a1 and 43a2 located at both outer edges of the front groove 43a. The edge portions 43a1 and 43a2 protrude as shown in FIG. 24. By having the edge portions 43a1 and 43a2, it is possible to prevent the outer edge of the hook of the rotation jig as the object from coming off the fixing tool 3 beyond the edge portions 43a1 and 43a2 when the fixing tool 3 rotates.

[0105] As shown particularly in FIG. 20, the rear groove 43b extends obliquely from near the top portion of the head 40 across the center C of the head 40 toward the circumferential side, and has a substantially arc-shaped configuration in a rear view, with the central portion being convexly curved toward the right in a front view, i.e., away from the rotation axis AR, compared to both the upper and lower ends. 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 rotation jig as the object.

[0106] Furthermore, similar to the back groove 23b of the rotation jig 1, the back groove 43b changes in position and cross-sectional shape in the head 40 along the vertical 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 the vicinity of the center C. Furthermore, the back groove 42b has an arcuate contour with a concave cross-section, 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.

[0107] As shown in FIGS. 18 and 20, the back groove 43b has edge portions 43b1 and 43b2 located at both outer edges of the back groove 43b. The edge portions 43b1 and 43b2 protrude as shown in FIG. 24. By having the edge portions 43b1 and 43b2, it is possible to prevent the outer edge of the hook of the rotation jig as an object from coming off the fixing tool 3 beyond the edge portions 43b1 and 43b2 when the fixing tool 3 rotates.

[0108] Furthermore, in the head 40, the arrangements of the groove portion 42 and the groove portion 43 are line-symmetric with the rotation axis AR as the center line. As a result, as shown in FIG. 19, in a front view, the front groove 42a of the groove portion 42 and the front groove 43a of the groove portion 43 are separated and arranged on the left and right sides with the rotation axis AR in between. Similarly, as shown in FIG. 20, in a rear view, the back groove 42b of the groove portion 22 and the back groove 43b of the groove portion 43 are separated and arranged on the left and right sides with the rotation axis AR in between.

[0109] In this case, the shape of the front groove 42a and the shape of the front groove 43a are line-symmetric with the rotation axis AR as the center line. Therefore, if the rotation axis AR is virtually folded as a broken line, the front groove 42a and the front groove 43a overlap and coincide. Similarly, the shape of the back groove 42b and the shape of the back groove 43b are line-symmetric with the rotation axis AR as the center line. Therefore, if the rotation axis AR is virtually folded as a broken line, the front groove 42a and the front groove 43a overlap and coincide.

[0110] The fixture 3 according to the embodiment of the present invention having the above configuration includes a head 40 having a groove portion 42 and a groove portion 43, so that the rotation jig connected to the hook as an object can hold and rotate the fixture 3 in a stable state with good workability. In particular, for example, even when the rotation jig is rotated at a relatively high speed using a drive motor such as an electric drill in order to rotate the rotation jig, the rotation jig can rotate while holding the fixture 3 in a stable state.

[0111] (Operation) The configurations of the groove portion 42 and the groove portion 43 of the head 40 in the fixture 3 correspond to the configurations of the groove portion 22 and the groove portion 23 of the main body portion 21 in the rotation jig 1, and the state in which the hook of the rotation jig and the fixture 3 are combined corresponds to the state in which the hook portion 20 of the rotation jig 1 and the eye bolt 100 are combined.

[0112] That is, the operation of attaching and detaching the fixture 3 to and from the object to be fixed by the rotation jig is performed based on the same action as the operation of attaching and detaching the eye bolt 100 by the rotation jig 1 described with reference to FIGS. 11 to 13.

[0113] Therefore, in the fixture 3 according to the embodiment of the present invention, by providing the head 40 having the groove portion 42 and the groove portion 43, an object such as the hook of the rotation jig is fitted into the groove portion 42 and the groove portion 43, and the movement is restricted along any of the vertical direction along the rotation axis AR of the fixture 3, and the left-right direction and the front-back direction orthogonal to the rotation axis AR, and it can be rotated while being held in a stable state.

[0114] Furthermore, in the fixture 3 according to the embodiment of the present invention, similar to the conventional rotating jig, the combination of the hook and the head 40 of the fixture 3 is performed by inserting the hook into the gap CL and hooking the hook on the head 40. Since the insertion of the hook can be performed from any side surface intersecting the rotation axis direction of the fixture 3, it can be performed in a state with good visibility. Also, since the front shape and dimensions of the gap CL are larger than the shape and dimensions of the tip of the hook, a large margin is ensured for the alignment accuracy. Thus, the combination of the rotating jig and the fixture 3 can be easily performed without impairing workability.

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

[0116] (Position and shape of the groove portion) The configurations of the groove portions 42 and 43 of the head 40 in the fixture 3 correspond to the configurations of the groove portions 22 and 23 of the main body portion 21 in the rotating jig 1.

[0117] That is, although it is preferable that the planar view shapes of the front groove 42a and the rear groove 42b of the groove portion 42 and the front groove 43a and the rear groove 43b of the groove portion 43 are formed based on the relationship between the hook as the object and the head 40, specifically, the positions and shapes of the groove portions 42 and 43 are preferably determined in the same manner as the positions and shapes of the groove portions 22 and 23 of the main body portion 21 of the hook portion 20 described with reference to FIGS. 14 and 15. Also, the positions and shapes of the groove portions 42 and 43 of the head 40 may be made different in the same manner as the positions and shapes of the groove portions 22 and 23 of the main body portion 21 of the hook portion 20.

[0118] (3. Remote operation tool) A remote operation tool 2, which is an example of the remote operation tool according to the embodiment of the present invention, will be described. FIG. 16 is a perspective view showing the remote operation tool 2 according to the embodiment of the present invention.

[0119] The remote operation tool 2 is an example of tools that cooperate with the rotation jig 1. The remote operation tool 2 includes a tie stick 210 and a connection part 211.

[0120] The tie stick 210 is a rod-shaped part formed by connecting a plurality of members. One end side is the hand side and receives operations by the operator.

[0121] The connection part 211 is a part that is attached to the shank part 10 of the rotation jig 1 and integrates the remote operation tool 2 and the rotation jig 1.

[0122] Such a remote operation tool 2 can rotate the rotation jig 1 by operating the tie stick 210 and cause the above-described rotation operation to be performed.

[0123] As an example of the use of the remote operation tool 2, it can be used for adjusting wire grippers and wire tensioners used in construction work such as electric wires and wires. That is, the wire grippers and wire tensioners are provided with an annular eye ring with a planar shape at the head for adjusting the opening degree and angle. By operating the eye ring using the rotation jig 1 as the tip of the remote operation tool 2, it is possible to hold and adjust the opening degree and angle of these wire grippers and wire tensioners in a stable state with good workability.

[0124] Note that the tools that cooperate with the rotation jig 1 can be any tools and instruments, including well-known and commonly used ones, as long as they have the function of attaching the shank part 10 and rotating the hook part 20, such as the chuck of a rotary tool.

[0125] (4. Modification example) In the rotation jig 1 according to the embodiment of the present invention, the hook part 20 has two sets of groove parts, namely the groove part 22 and the groove part 23. However, it may be selectively provided with either one of the sets of the groove part 22 and the groove part 23.

[0126] In this case, it is preferable to determine the selection of the groove portion 22 or the groove portion 23 according to the purpose of use of the object. That is, when the rotation of the object by the rotation jig 1 is only for the purpose of the fastening operation, among the front portion 21a or the rear portion 21b of the hook portion 20, the groove portion 22 or the groove portion 23 is formed 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 the rotation jig 1 is only for the purpose of the operation of releasing the fastening, it is preferable that the groove portion 22 or the groove portion 23 is formed only on the side facing the object in the rotation direction corresponding to the release of the fastening, among the front portion 21a or the rear portion 21b.

[0127] In the rotation jig 1 according to the embodiment of the present invention, the hook portion 20 has a mode in which a part of the outer shape of the main body portion 21 having a substantially annular outer shape is cut out, so that a substantially C-shaped outer shape is formed in a front view or a rear view. However, as long as the hook portion 20 can hook the object from the tip, it may have an arbitrary outer shape such as an oval shape or a rectangular shape.

[0128] In the rotation jig 1 according to the embodiment of the present invention, the object to be rotated by the rotation jig 1 is mainly an eyebolt, taking the eyebolt 100 as an example. However, the object may be any mechanical element or fixture having any purpose or use, as long as it can be hooked on the hook portion 20 and rotate following the rotation of the rotation jig 1, and can be in a state of being fitted into the groove portion 22 or the groove portion 23 during rotation. Therefore, the object may be a nut, an eye ring, or any other mechanical element or fixture including the above-mentioned eye ring.

[0129] Also, in the fixture 3 according to the embodiment of the present invention, the head portion 40 has two sets of groove portions, i.e., the groove portion 42 and the groove portion 43. However, it may selectively have either one of the sets of the groove portion 42 and the groove portion 43.

[0130] In this case, it is preferable to determine the selection of the groove portion 42 or the groove portion 43 according to the object to be fixed. That is, when the rotation of the hook of the rotation jig as the object is only for the purpose of the fastening operation, among the front portion 41a or the back portion 41b of the head portion 40, the groove portion 42 or the groove portion 43 is formed on the side facing the object in the rotation direction corresponding to the fastening by the object.

[0131] In the fixture 3 according to the embodiment of the present invention, the head portion 40 has an annular outer shape together with the connection end 32 of the screwing portion 30. However, as long as it is an annular shape that can be hooked by a hook, it may have an arbitrary outer shape such as an oblong shape, an elliptical shape, a rectangular shape, or the like.

[0132] In the fixture 3 according to the embodiment of the present invention, the example of the fixture 3 is an eye bolt. However, the fixture is hooked by the hook of the rotation jig as the object and rotates following the rotation of the rotation jig, and as long as it can be in a state of being fitted into the groove portion 22 or the groove portion 23 during rotation. Therefore, in addition to the eye bolt, the fixture may be any mechanical element or fixture having an arbitrary purpose and use, including an eye nut.

[0133] Furthermore, the rotation body for fastening according to the embodiment of the present invention is the rotation jig 1 or the fixture 3. However, the rotation body for fastening of the present invention includes a shaft portion that can be rotated by an external force applied from one end side, and a hooking portion provided on the other end side of the shaft portion that hooks on a predetermined object, and as long as it rotates following the rotational force applied from the object to the shaft portion, it may be any other tool or mechanical element having an arbitrary purpose and use.

[0134] As described above, the embodiments of the present invention are disclosed in the above description, but the present invention is not limited thereto.

[0135] That is, without departing from the technical idea and scope of the object of the present invention, various changes can be made to the embodiments and each modification described above with respect to the mechanism, shape, material, quantity, position, or arrangement, etc., and they are included in the present invention.

Explanation of Reference Numerals

[0136] 1 Rotating jig 2 Remote operating tool 3 Fixing tool 10 Shank portion 10a, 30a Tip 10b, 32 Connection end 20 Hook portion 21a, 41a Front portion 21b, 41b Rear portion 21B Base end 21T Tip end 21 Main body portion 22, 23, 42, 43 Groove portion 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 portion 30 Threaded engagement portion 31 Male thread 40, 120 Head 100 Eye bolt 110 Bolt body 120a, 120b End 120a1, 120a2, 120b1, 120b2 Surface 120x Opening 200 Pedestal 210 Tie - stick 211 Connection portion

Claims

1. a shaft portion rotatable by an external force applied from one end side, and a catching portion provided on the other end side of the shaft portion and catching on a predetermined object, a fastening rotating body that rotates following a rotational force applied from the object to the shaft portion, wherein the catching portion has a groove portion formed along the surface shape of the object on a surface facing the object that rotates following the catching portion when rotating in a state of catching the object, a fastening rotating body.

2. The groove portion includes at least one set of a front groove located on the surface side of a plane including the rotation axis of the shaft portion and a back groove located on the back side of the plane, The front groove and the back groove of the groove portion are arranged with the rotation axis of the shaft portion interposed therebetween. The fastening rotating body according to claim 1.

3. The groove portion includes two sets of the front groove and the back groove, One of the front grooves of the two sets of groove portions and the other front groove of the two sets of groove portions are arranged with the rotation axis of the shaft portion interposed therebetween on the surface side of the plane, One of the back grooves of the two sets of groove portions and the other back groove of the two sets of groove portions are arranged with the rotation axis of the shaft portion interposed therebetween on the back side of the plane. The fastening rotating body according to claim 2.

4. The arrangement of the front groove and the back groove of the groove portion is line-symmetric with respect to the rotation axis of the shaft portion. The fastening rotating body 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 left-right symmetric with respect to the rotation axis of the shaft portion from a viewpoint in a direction orthogonal to the plane. The fastening rotating body according to claim 2 or 3.

6. The front groove and the back groove in the set of groove portions are curved convexly in a direction away from the rotation axis of the shaft portion from a viewpoint in a direction orthogonal to the plane. The fastening rotating body according to claim 2 or 3.

7. The shaft portion functions as a shank portion detachably coupled to a machine or instrument that generates a rotational force, The catching portion functions as a hook portion that catches the object from the tip, It functions as a rotation jig that rotates the object following the rotational force applied to the shank portion. The fastening rotating body according to claim 1.

8. The fastening rotating body that functions as the rotation jig according to claim 1, and a connecting portion connected to one end side of the shaft portion that functions as the shank portion, a remote operating tool.

9. The shaft portion has either a male thread formed on the outer peripheral surface or a female thread formed on the inner peripheral surface, and functions as a screwing portion that screws into the object to be fixed. The engaging portion functions as an annular head that is hooked on the object that is a hook. It functions as a fixture that is fixed to the object to be fixed by screwing in accordance with the rotational force from the object. The rotating body for fastening according to claim 1.

Images