Nut rotation assisting tool

Abstract

To efficiently rotate a nut even if a space for rocking a wrench is insufficient, and to efficiently rotate both nuts when the two nuts are screwed to one bolt.SOLUTION: In the nut rotation assisting implement for assisting the rotation of a main nut 70A and a lock nut 70B screwed to a bolt 60, an action part 30 is formed at a first end part of a cylindrical body part 20, and an operated part is formed at a second end part. The working part 30 is formed by a deep-hole 30A and a shallow-hole 30B. The deep hole 30A has a depth corresponding to or larger than those of both the nut 70A and the 70B in a state where their phases coincide with each other, and the shallow hole 30B corresponds only to the lock nut 70B. The deep-hole 30A and the shallow-hole 30B are formed concentrically and in a state in which the phases thereof in the direction around the central axis do not coincide with each other.SELECTED DRAWING: Figure 4A

Description

[Technical Field]

[0001] The present invention relates to a tool that assists in turning a nut. [Background technology]

[0002] For example, in automobiles and the like, many components are joined together, and bolts and nuts are often used for these joining operations. To rotate a nut, a nut-rotating tool such as a wrench (spanner) is generally used. That is, the tip of the wrench is fitted onto the nut, and the user grips the base end of the wrench and moves it back and forth to rotate the nut. By repeating this process, the nut rotates as desired, tightening or loosening the nut. During the return movement of the reciprocating operation described above, the tip of the wrench may be disengaged from the nut, or the wrench may spin freely if it has a ratchet function.

[0003] During the above-described work, the wrench swings in a fan shape with the bolt and nut as the reference. However, when various components are crowded together, it is not possible to secure a sufficiently large fan-shaped space, and the swing angle is inevitably small, meaning that the nut can only rotate a small angle in one swing. This requires the wrench to be repeatedly and slightly oscillated back and forth, which is a very cumbersome task.

[0004] In some cases, multiple nuts are threaded onto a single bolt in series. For example, two nuts, a main nut and a lock nut, are threaded onto the bolt. In this case, the main nut is positioned in a predetermined position and the adjacent lock nut prevents the main nut from loosening. In this case, while there are times when only the lock nut is rotated as the final step, in other cases it is preferable to rotate both nuts simultaneously in order to improve the efficiency of the overall screwing operation. However, if you have to prepare separate wrenches for turning only one nut and for turning multiple nuts at the same time, and switch between them depending on the situation, it could actually reduce work efficiency.

[0005] The following patent documents show prior art. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-113191 Summary of the Invention [Problem to be solved by the invention]

[0007] To provide a method for efficiently rotating a nut even when sufficient space for a nut rotating tool to swing cannot be secured due to components being crowded together. Another object of the present invention is to enable efficient rotation of a plurality of nuts when the nuts are arranged in series on the same axis. [Means for solving the problem]

[0008] In order to solve the above problems, a first aspect of the present invention is a nut rotation assist tool that assists in rotating a first nut and a second nut that are arranged in series on the same axis using a nut rotation tool, the nut rotation assist tool extending in one direction and having a first end and a second end, an operating portion into which the first nut and the second nut are fitted is formed at the first end, and an operated portion that is rotated by the nut rotation tool is formed at the second end, the operating portion being formed by a deep hole and a shallow hole, the deep hole having a depth corresponding to or greater than the first nut and the second nut in a state where their phases in the axial direction about the same axis coincide with each other, and the shallow hole only corresponds to the second nut, and the deep hole and the shallow hole are formed concentrically but with their phases in the axial direction about the central axis not coinciding with each other.

[0009] Similarly, a second aspect of the present invention is a nut rotation assist tool that assists in rotating a first nut and a second nut that are arranged in series on the same axis using a nut rotation tool, the tool extending in one direction and having a first end and a second end, an operating portion into which the first nut and the second nut are fitted is formed at the first end, and an operated portion that is turned by the nut rotation tool is formed at the second end, the operating portion being formed by a deep hole and a shallow hole, and the deep hole is configured to rotate the first nut and the second nut in a state where their phases around the axis are aligned with each other. The nut rotation assist tool is a nut rotation assist tool in which the second nut is accommodated and at least a portion of the first nut is accommodated, and both nuts are rotated based on the rotation of the nut rotation assist tool around its own axis, and the shallow hole is a nut rotation assist tool in which at least a portion of the second nut is accommodated and the second nut is rotated based on the rotation of the nut rotation assist tool around its own axis, and the deep hole and the shallow hole are formed concentrically and their phases around the central axis do not match.

[0010] In the first and second aspects of the present invention, a typical example of "the phases of the two components in the direction around the central axis do not match" is "the phases of the two components in the direction around the central axis are shifted by 30 degrees."

[0011] In both types of nut rotation assisting tools, when a nut (both the first nut and the second nut, or only the second nut) is fitted into the acting portion, the nut rotation assisting tool rotates around its own axis by receiving a rotational operation from the nut rotation tool at the operated portion, causing the nut to rotate. In this way, by having the nut rotated by the nut rotating tool via the nut rotating assist tool of this type, even in a situation where sufficient space for the nut rotating tool to swing is not normally secured due to components being crowded together, it becomes possible to rotate the nut rotating tool in a remote location where there is sufficient space. In this way, it becomes possible to rotate the nut efficiently.

[0012] In both types of nut rotation assist tools, the first nut and the second nut are fitted into a deep hole with their phases aligned around the same axis, and both nuts are rotated simultaneously. Also, only the second nut is fitted into the shallow hole, and only the second nut is rotated. In this way, it is possible to rotate both nuts simultaneously or to rotate only the second nut. In this way, it becomes possible to rotate the two nuts efficiently.

[0013] A third aspect of the present invention is a nut rotation assist tool of the first or second aspect, wherein the main body portion is formed with a marking to allow the operator to distinguish between the deep hole and the shallow hole by sight and / or touch.

[0014] In the nut rotation assist tool of this aspect, the following effects can be obtained in addition to the effects of the nut rotation assist tool of the first or second aspect. That is, based on the mark formed on the main body, the worker can distinguish between a deep hole and a shallow hole by his / her own sense of sight and / or touch. In this way, deep holes and shallow holes are not confused, and the effects of the nut rotation assist tool of the first or second aspect can be reliably obtained.

[0015] A fourth aspect of the present invention is a nut rotation assist tool of the first or second aspect, wherein the peripheral wall surface of the main body has a convex portion and / or a concave portion formed thereon corresponding to at least one of the deep hole and the shallow hole.

[0016] The "protrusion" includes a "protrusion" and the "recess" includes a "groove".

[0017] In the nut rotation assist tool of this aspect, the following effects can be obtained in addition to the effects of the nut rotation assist tool of the first or second aspect. That is, based on the convex portions and / or concave portions formed on the peripheral wall surface of the main body, the worker can distinguish between a deep hole and a shallow hole by his / her own sense of sight and / or touch. In this way, deep holes and shallow holes are not confused, and the effects of the nut rotation assist tool of the first or second aspect can be reliably obtained.

[0018] A fifth aspect of the present invention is a nut rotation assist tool of the first or second aspect, wherein the peripheral wall surface of the main body is formed with protrusions and / or grooves having different lengths corresponding to the difference in depth between the deep hole and the shallow hole, corresponding to the deep hole and the shallow hole.

[0019] An example of "protrusions and / or grooves are formed having different lengths corresponding to the difference in depth between the deep hole and the shallow hole" is "protrusions and / or grooves are formed having lengths corresponding to the depths of the deep hole and the shallow hole, respectively." However, it is not limited to this, and there is also the case where "the protrusions and / or grooves formed corresponding to the deep holes are longer than the protrusions and / or grooves formed corresponding to the shallow holes."

[0020] In the nut rotation assist tool of this aspect, the following effects can be obtained in addition to the effects of the nut rotation assist tool of the first or second aspect. That is, the operator can distinguish between a deep hole and a shallow hole by his / her own sight and / or touch based on the protrusions and / or grooves formed on the peripheral wall surface of the main body. In this way, deep holes and shallow holes are not confused, and the effects of the nut rotation assist tool of the first or second aspect can be reliably obtained.

[0021] A sixth aspect of the present invention is a nut rotation assist tool according to any one of the first to fifth aspects, wherein the operated portion has a rectangular column portion in which a rectangular hole portion is formed.

[0022] The "rectangular column" includes a "hexagonal column" and a "square column", etc. The "square hole" includes a "hexagonal hole" and a "square hole".

[0023] In addition to the effects of the nut rotation assist tool of any one of the first to fifth aspects, the nut rotation assist tool of this aspect has the following effects. That is, since the operated portion is formed with a rectangular column portion and a rectangular hole portion, it is possible to use either a tool for rotating the nut that corresponds to the rectangular column portion or a tool that corresponds to the rectangular hole portion. [Brief explanation of the drawings]

[0024] [Figure 1] 1A and 1B are perspective views showing an assist tool for nut rotation according to an embodiment of the present invention, as viewed from different angles. [Figure 2A]

[0023] Figures 1A and 1B show a nut rotation assist tool according to an embodiment of the present invention. (a) is a side view, (b1) is a view of (a) seen from the right, and (b2) is a view of (a) seen from the left. (c) is a longitudinal cross-sectional view of (a), and (d1), (d2), and (d3) are cross-sectional views taken along line II, line II-II, and line III-III in (c), respectively. [Figure 2B]

[0023] Figures 1A and 1B show a nut rotation assist tool according to an embodiment of the present invention. (a) is a plan view, (b1) is a view of (a) seen from the right, and (b2) is a view of (a) seen from the left. (c) is a longitudinal cross-sectional view of (a), and (d1), (d2), and (d3) are cross-sectional end views taken along line II, line II-II, and line III-III in (c), respectively. [Figure 3A] 2A is an enlarged perspective view showing a part of a nut rotation assist tool according to an embodiment of the present invention. FIG. 2B is an enlarged front view (enlarged view of (b1) in FIG. 2A) showing the nut rotation assist tool according to an embodiment of the present invention. In FIG. 2B, shallow holes are indicated by solid lines and two-dot chain lines. [Figure 3B] (1), (2), and (3) are enlarged views of (d1), (d2), and (d3) in Fig. 2A, respectively. In (1), the deep hole is indicated by a solid line and a dashed line, and the shallow hole is indicated by a solid line and a dashed line. [Figure 4A] 1A and 1B are diagrams showing a method of using an assist tool for nut rotation according to an embodiment of the present invention, illustrating a state in which two nuts are rotated using deep holes, in which (a) is a perspective view showing the state immediately before the two nuts are fitted into the deep holes, (b) is a perspective view showing the fitted state, and (c) is a longitudinal cross-sectional view thereof. [Figure 4B] 1A is a perspective view showing the state immediately before the lock nut is fitted into the shallow hole, FIG. 1B is a perspective view showing the fitted state, and FIG. 1C is a cross-sectional view of the same. [Figure 5A] 1A and 1B are diagrams showing a method of using the nut rotation assist tool according to one embodiment of the present invention, illustrating a state in which a first operated part is rotated, where (a) is a perspective view showing the state immediately before use, and (b) is a perspective view showing the state in use. [Figure 5B] 1A and 1B are diagrams showing a method of using the nut rotation assist tool according to one embodiment of the present invention, illustrating a state in which a second operated portion is rotated, where (a) is a perspective view showing the state immediately before use, and (b) is a perspective view showing the state in use. [Figure 6]1A and 1B are diagrams showing an overall method of using an assist tool for nut rotation according to an embodiment of the present invention, in which (a) is a perspective view showing the state immediately before use, and (b) is a perspective view showing the state after use. [Figure 7] 4A(c) is a cross-sectional view corresponding to FIG. 4A(c), showing a modified example of an embodiment of the present invention. [Figure 8] 4B(c) is a cross-sectional view showing another modified example of the embodiment of the present invention. [Figure 9] 3A(a) is a perspective view corresponding to FIG. 3A(a), and FIG. 3B(b) is a cross-sectional view corresponding to FIG. 3B(1). DETAILED DESCRIPTION OF THE INVENTION

[0025] [Example] Next, an embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 6, this nut rotation assist tool 10 (Fig. 1) is suitable for rotating two nuts 70A, 70B (a main nut 70A and a lock nut 70B that are in series) on one bolt 60. Note that hereinafter, the "nut rotation assist tool 10" will also be simply referred to as the "rotation assist tool 10." The "main nut 70A" corresponds to the "first nut" of the present invention, and the "lock nut 70B" corresponds to the "second nut" of the present invention. Also, the "bolt 60 (its central axis)" corresponds to the "same axis" of the present invention.

[0026] The lock nut 70B is in close contact (pressure contact) with the main nut 70A that is positioned at a predetermined position on the bolt 60, and prevents the main nut 70A from loosening and shifting from the predetermined position. As shown in FIG. 4A(a), the main nut 70A and the lock nut 70B have the same size and regular hexagonal shape, and have the same thickness (axial length).

[0027] As shown in FIGS. 1 to 2B, the rotation assist tool 10 has a generally cylindrical shape as a whole and extends in one direction. The rotary assist tool 10 has a cylindrical main body 20, with an operating portion 30 formed at one end (first end) thereof and an operated portion 40 formed at the other end (second end). The main body 20 has a peripheral wall surface (reference numeral omitted) with a circular cross section. A through hole 22 is formed on the central axis of the main body 20 (FIGS. 2A(c), 2B(c)), and the through hole 22 communicates with the operating portion 30 and the operated portion 40. The through hole 22 has a circular cross section (FIGS. 2A(b1), 2B(b1)).

[0028] As shown in Figures 4A and 4B, the operating part 30 corresponds to the nuts 70A and 70B. As shown in Figures 5A and 5B, the operated part 40 is rotated by a nut rotation tool such as a wrench (open-end wrench 90a, square wrench 90b). Then, when both the main nut 70A and the lock nut 70B (FIG. 4A) or only the lock nut 70B (FIG. 4B) are fitted into the operating portion 30 (FIGS. 4A, 4B), and the operated portion 40 is rotated by wrenches 90a, 90b (FIGS. 5A, 5B), the entire rotation assist tool 10 (FIG. 6) rotates around its own axis, and the corresponding nut (both nuts 70A, 70B, or only the lock nut 70B) rotates.

[0029] 4A and 4B, the action part 30 (FIG. 1(a)) corresponds to the nuts 70A, 70B (FIG. 6), and is formed in the shape of a hole that faces the second end at the first end of the rotation assist tool 10. That is, it is formed in the shape of a cavity that opens at the first end of the rotation assist tool 10.

[0030] As shown in FIGS. 2A to 4B, the action portion 30 is formed by a deep hole 30A and a shallow hole 30B. The deep hole 30A and the shallow hole 30B have a regular hexagonal cross section that corresponds to the size of both nuts 70A and 70B (FIGS. 4A and 4B). The deep hole 30A and the shallow hole 30B are formed concentrically (i.e., they share a common central axis) and both extend in the longitudinal direction of the main body 20. As shown in FIG. 3A(b) and FIG. 3B(1), the phases of the holes 30A and 30B in the direction around the central axes of the holes 30A and 30B do not match, but are shifted by 30 degrees.

[0031] From another perspective, as shown in Figures 2A, 2B, and 3A(b), in the length portion of the operating section 30 where the shallow hole 30B is formed, two holes, the shallow hole 30B and the deep hole 30A, both of which have the same size regular hexagonal cross section, are formed overlapping each other at an angle of 30 degrees.As a result, it can be said that a hole is formed whose cross section resembles the outline of a flower with 12 petals, as shown in (d1) of both Figures 2A and 2B and Figure 3B(1).

[0032] 2 to 4B, the deep hole 30A has a regular hexagonal cross section, and as shown in Fig. 2B(c) and other figures, its size (the length between a pair of opposing sides of the regular hexagonal cross section) is longer than the diameter of the through-hole 22. Therefore, as shown in Fig. 3A(b), the bottom 32A of the deep hole 30A ((c) in both Figs. 2A and 2B) has a regular hexagonal outer shape and has a circular hole in its center. Also, as shown in Figures 3A(a) and 3A(b), the bottom 32B of the shallow hole 30B ((c) in both Figures 2A and 2B) has the shape of six small triangles, where two regular hexagons of the same size are stacked concentrically and offset by 30 degrees around a common central axis, with one regular hexagon protruding from the other.

[0033] As shown in Figure 4A(c), etc., the depth of the deep hole 30A (the length from the tip of the operating portion 30 to the bottom 32A) is sufficiently deeper than the depth corresponding to the thickness of the two nuts (main nut 70A and lock nut 70B) (i.e., the total thickness of both nuts 70A, 70). On the other hand, as shown in Figure 4B(c), etc., the depth of the shallow hole 30B (the length from the tip of the operating portion 30 to the bottom 32B) corresponds to the thickness of one nut (lock nut 70B), i.e., is the same as or almost the same as that thickness.

[0034] As shown in Figures 2A, 2B, 3A(a), etc., grooves 25A and 25B are formed on the peripheral wall surface of the main body 20 as markers corresponding to the deep hole 30A and shallow hole 30B, as follows.

[0035] Grooves (deep-hole-corresponding grooves 25A) corresponding to the deep hole 30A are formed in the peripheral wall surface of the main body 20 at positions corresponding to the six vertices of the deep hole 30A (which has a regular hexagonal cross section as described above) and corresponding to the depth of the deep hole 30A. That is, each deep-hole-corresponding groove 25A extends along the length of the main body 20 from the tip of the action part 30 to a position corresponding to the bottom 32A of the deep hole 30A.

[0036] Similarly, grooves corresponding to shallow holes 30B (shallow-hole-corresponding grooves 25B) are formed in the peripheral wall surface of main body 20 at positions corresponding to the six vertices of shallow holes 30B (which also have a regular hexagonal cross section as described above) and corresponding to the depth of shallow holes 30B. That is, each shallow-hole-corresponding groove 25B extends along the length direction of main body 20 from the tip of action part 30 to a position corresponding to bottom 32B of shallow hole 30B.

[0037] 3B, the cross section of each deep-hole-corresponding groove 25A is larger than the cross section of each shallow-hole-corresponding groove 25B, i.e., each deep-hole-corresponding groove 25A is wider and deeper than each shallow-hole-corresponding groove 25B.

[0038] For the above reasons, the worker can distinguish between the deep-hole corresponding groove portion 25A and the shallow-hole corresponding groove portion 25B by touch with his / her fingertips and / or by sight.

[0039] Returning to Figures 2A, 2B, 3A(a), etc., a number of anti-slip grooves 26 are formed on the peripheral wall surface of the main body 20 in a portion corresponding to approximately half of the bottom 32A side of the deep hole 30A. Each anti-slip groove 26 also extends along the length of the main body 20 . 3B, each anti-slip groove 26 is smaller in cross section than each shallow-hole-corresponding groove 25B. That is, each anti-slip groove 26 is narrower and shallower than each shallow-hole-corresponding groove 25B. As described above, anti-slip grooves 26 differ from deep-hole-corresponding grooves 25A and shallow-hole-corresponding grooves 25B in terms of their positions and number. Therefore, the worker can distinguish between the deep-hole corresponding groove portion 25A and the shallow-hole corresponding groove portion 25B and the anti-slip groove portion 26 by touch with the tip of his / her finger and / or by sight.

[0040] As described above with reference to FIGS. 5A and 5B, the operated portion 40 is operated by the wrenches 90a and 90b. The operated portion 40 has a first operated portion 40a and a second operated portion 40b.

[0041] The first operated portion 40a is a hexagonal prism portion. That is, the first operated portion 40a has a regular hexagonal cross section and an outer surface shape that forms a short axis extending in the axial direction of the rotation assist tool 10. The first operated portion 40a is rotated by the open-end wrench 90a while being fitted into the open fitting portion 92a of the open-end wrench 90a.

[0042] The second operated portion 40b is a square hole portion, i.e., the second operated portion 40b is open at the second end of the rotation assist tool 10, has a square cross section, and is formed in a hollow shape extending in the axial direction of the rotation assist tool 10. The second operated portion 40b is rotated by the square wrench 90b in a state in which the square column-shaped portion 92ba of the square wrench 90b is fitted therein.

[0043] Next, the method of use and the effects of the rotation assist tool 10 will be described. As shown in Figure 6, in order to efficiently tighten and turn the main nut 70A and the lock nut 70B on the bolt 60, as mentioned above, it is preferable to first tighten and turn both nuts 70A and 70B simultaneously, and then tighten and turn only the lock nut 70B.

[0044] Therefore, first, the main nut 70A and the lock nut 70B are tightened at the same time. 4A(a), first, the main nut 70A and the lock nut 70B are positioned close to each other on the bolt 60, and the phases of the bolt 60 are matched. That is, the hexagonal shapes of both nuts 70A and 70B are aligned. 4A(b) and 4A(c), the rotation assist tool 10 is moved toward both nuts 70A and 70B, and both nuts 70A and 70B are fitted into the deep holes 30A in the action part 30 of the rotation assist tool 10. The rotation assist tool 10 is guided in this manner. At this time, the worker recognizes the deep-hole corresponding groove portion 25A by touch or the like, and aligns the deep hole 30A with both nuts 70A, 70B so that both nuts 70A, 70B enter the deep hole 30A.

[0045] In this state, as shown in Figures 5A and 5B, the rotary assist tool 10 is rotated around its axis at the operated part 40 (first operated part 40a or second operated part 40b) using an open-end wrench 90a (Figure 5A) or a square wrench 90b (Figure 5B). In this way, both nuts 70A, 70B (FIG. 4A(c)) are efficiently tightened simultaneously, and the main nut 70A is positioned at a predetermined position, and the lock nut 70B is positioned approximately at a predetermined position.

[0046] Next, tighten only the lock nut 70B. In this case, first, as shown in FIG. 4A(a), the rotation assist tool 10 is moved along the axial direction of the bolt 60 in the opposite direction to that described above, so that both nuts 70A, 70B come out of the deep hole 30A.

[0047] Next, as shown in FIG. 4B(a), the lock nut 70B is rotated 30 degrees around the axis of the bolt 60 (note that instead of rotating the lock nut 70B, the entire rotation assist tool 10 may be rotated 30 degrees). 4B(b) and 4B(c), the lock nut 70B is fitted into the shallow hole 30B in the action portion 30 of the rotation assist tool 10. The rotation assist tool 10 is guided in this manner. At this time, the worker recognizes the shallow hole corresponding groove portion 25B by touch or the like, and aligns the shallow hole 30B with the lock nut 70B so that the lock nut 70B fits into the shallow hole 30B.

[0048] In this state, as described above based on Figures 5A and 5B, the rotary assist tool 10 is rotated around its axis at the operated part 40 (first operated part 40a or second operated part 40b) using an open-end wrench 90a (Figure 5A) or a square wrench 90b (Figure 5B). In this way, only the lock nut 70B (FIG. 4B(c)) is tightened, preventing the main nut 70A from loosening.

[0049] By using the rotation assist tool 10 as described above, the following effects can be obtained. As described above, the nuts 70A, 70B (FIGS. 4A, 4B) are rotated by the open-end wrench 90a (FIG. 5A) or the square wrench 90b (FIG. 5B) via the rotation assist tool 10. FIG. 6 shows an example in which the square wrench 90b (FIG. 5B) is used.

[0050] As shown in FIG. 6, by interposing the rotation assist tool 10 between the nuts 70A, 70B and the wrench 90b, the position of the wrench 90b is spaced apart from the positions of the nuts 70A, 70B. Therefore, even when various components are crowded near nuts 70A, 70B, wrench 90b (or 90a) can be operated at a position separated from the nuts. This makes it possible to swing wrench 90b (or 90a) at a large angle, and to rotate nuts 70A, 70B at a large angle with a single swing operation of wrench 90b (or 90a) (more precisely, during the forward movement of the wrench). This can greatly improve the efficiency of rotating the nuts 70A and 70B.

[0051] Furthermore, the rotation assist tool 10 is extremely effective in rotating two nuts 70A, 70B (main nut 70A and lock nut 70B) that are threaded onto one bolt 60 and arranged in series, as described above. As described above with reference to Figures 4A and 4B, first, both nuts 70A, 70B are fitted into the deep hole 30A and both nuts 70A, 70B are rotated using the deep hole 30A. After the main nut 70A is positioned in the predetermined position, the operating part 30 (deep hole 30A) of the rotation assist tool 10 is removed from both nuts 70A, 70B, and the lock nut 70B is fitted into the shallow hole 30B and rotated using the shallow hole 30B to tighten the lock nut 70B. In this way, it is possible to use one rotation assist tool 10 to efficiently rotate both nuts 70A, 70B.

[0052] The anti-slip grooves 26 prevent the operator's fingers (some of the operator's five fingers) from slipping, allowing the operator to grip the rotation assist tool 10 and reliably engage and disengage the nuts 70A and 70B.

[0053] Furthermore, when attempting to fit a nut into the deep hole 30A or shallow hole 30B, the worker can recognize the deep hole corresponding groove portion 25A and / or shallow hole corresponding groove portion 25B by touch and / or vision with his / her fingertips (fingers other than those positioned in the anti-slip groove portion 26), and can easily fit both nuts 70A and 70B, or only the lock nut 70B, into the specified hole (deep hole 30A or shallow hole 30B) without confusing the deep hole 30A with the shallow hole 30B.

[0054] [Modifications for deep and shallow holes] The following are variations of the above embodiment. For example, in the above embodiment, as described above based on Figure 4A(c) etc., the deep hole 30A has a depth that is sufficiently longer than the depth corresponding to the total thickness of the two nuts (main nut 70A and lock nut 70B). However, without being limited thereto, the deep hole 30A may have a depth corresponding to the total thickness of the two nuts (main nut 70A and lock nut 70B), i.e., a depth that is the same as or approximately the same as the total thickness of both nuts 70A, 70B.

[0055] As shown in FIG. 7, the deep hole 30A may be shallower than the depth corresponding to the total thickness of the two nuts (main nut 70A and lock nut 70B). In this case, the lock nut 70B is completely housed in the deep hole 30A, but the main nut 70A is partly housed in the deep hole 30A and the remaining part is exposed from the deep hole 30A. That is, even in this state, both nuts 30A, 30B may rotate based on the rotation of the rotation assist tool 10 about its axis. It is sufficient that the main nut 70A is fitted into the deep hole 30A to an extent that allows this. In other words, it can be said that the deep hole 30A needs to have at least that much depth.

[0056] Similarly, as shown in FIG. 8, the shallow hole 30B may have a depth shallower than the depth corresponding to the thickness of one nut (lock nut 70B). In this case, a portion of the lock nut 70B is housed in the shallow hole 30B, and the remainder is exposed from the shallow hole 30B. That is, even in this state, the lock nut 70B may rotate based on the rotation of the rotation assist tool 10 about its axis. It is sufficient that the lock nut 70B is fitted into the shallow hole 30B to an extent that allows this. In other words, it can be said that the shallow hole 30B needs to have at least that much depth.

[0057] In the above embodiment, the main nut 70A and the lock nut 70B have the same thickness (axial length), but the thicknesses of the nuts 70A and 70B may be different. In this case, the depth of the deep hole 30A and / or the shallow hole 30B is appropriately changed as needed. For example, the main nut 70A may be thicker than that in Example 1, and the lock nut 70B may be thinner than that in Example 1. In this case, the depth of the shallow hole 30B is accordingly shallower than that in the above-mentioned example.

[0058] [Variations regarding signs] 2A and 2B, the grooves 25A and 25B are formed as markers corresponding to the deep hole 30A and the shallow hole 30B. However, the present invention is not limited to this, and various modifications are possible. For example, protrusions may be formed corresponding to the deep holes 30A and grooves may be formed corresponding to the shallow holes 30B, or vice versa. Alternatively, both may be protruding portions, and the deep holes 30A and shallow holes 30B may be distinguished from each other by differences in their lengths and / or cross-sectional sizes.

[0059] 9, a substantially hemispherical convex portion 125A may be formed corresponding to the deep hole 30A, and a substantially hemispherical concave portion 125B may be formed corresponding to the shallow hole 30B. In this case, the convex portion 125A and the concave portion 125B may be formed at the same length position in the action portion 30 as shown in FIG. 9, or may be formed at different length positions. Conversely, recesses may be formed corresponding to the deep holes 30A, and protrusions may be formed corresponding to the shallow holes 30B. Alternatively, protrusions or recesses may be formed corresponding to both the deep holes 30A and the shallow holes 30B, and the deep holes 30A and the shallow holes 30B may be distinguished from each other by differences in size or the like. Furthermore, a convex portion (including a protruding portion) or a concave portion (including a groove portion) may be formed corresponding to only one of the deep hole 30A and the shallow hole 30B.

[0060] Furthermore, in addition to the above-described embodiment in which convex portions (including protruding portions) and / or concave portions (including groove portions) are formed on the peripheral wall surface of the main body portion 20 as markers, and the deep hole 30A and / or shallow hole 30B can be recognized by the worker's touch and / or sight, the following embodiments are also possible. That is, there may be an embodiment in which characters, figures, patterns, colors, etc. are applied as markers to the peripheral wall surface of the main body 20 in correspondence with the deep holes 30A and / or shallow holes 30B. In this case, the deep holes 30A and / or shallow holes 30B can be visually recognized by the worker.

[0061] The present invention is not limited to the above examples, and can of course be embodied in various other forms with further modifications based on the knowledge of those skilled in the art. [Explanation of symbols]

[0062] 10 Rotational auxiliary tools 20 Main body 25A Deep hole compatible groove 125A Convex part 25B Shallow hole compatible groove 125B Concave 30 Working part 30A deep hole 30B Shallow hole 40 Operated part 40a 1st operated part 40b 2nd operated part 60 volts 70A Main Nut (First Nut) 70B Lock nut (second nut) 90a Open-end wrench (nut turning tool) 90b Square wrench (nut turning tool)

Claims

1. A nut rotation assist tool that assists in rotating a first nut and a second nut that are arranged in series on the same axis using a nut rotation tool, a nut rotating tool having a first end and a second end, the first end being formed with an operating portion into which the first nut and the second nut are fitted, and the second end being formed with an operated portion that is rotated by the nut rotating tool; The action portion is formed by a deep hole and a shallow hole, The deep hole has a depth corresponding to or greater than the depth of the first nut and the second nut in a state where their phases in the direction around the same axis are aligned with each other, The shallow hole corresponds only to the second nut, The deep hole and the shallow hole are formed concentrically, but their phases in the direction around the central axis do not coincide with each other. Nut rotation auxiliary tool.

2. A nut rotation assist tool that assists in rotating a first nut and a second nut that are arranged in series on the same axis using a nut rotation tool, a nut rotating tool having a first end and a second end, the first end being formed with an operating portion into which the first nut and the second nut are fitted, and the second end being formed with an operated portion that is rotated by the nut rotating tool; The action portion is formed by a deep hole and a shallow hole, The deep hole accommodates the first nut and the second nut in a state where the phases of the first nut and the second nut are aligned with each other in the direction around the axis, and also accommodates at least a part of the first nut, and both nuts are rotated based on the rotation of the nut rotation assist tool in the direction around its own axis, The shallow hole accommodates at least a portion of the second nut, and the second nut is rotated based on rotation of the nut rotation assist tool in a direction around its own axis, The deep hole and the shallow hole are formed concentrically, but their phases in the direction around the central axis do not coincide with each other. Nut rotation auxiliary tool.

3. The nut rotation assist tool according to claim 1 or 2, The main body portion is provided with a mark for allowing an operator to visually and / or tactilely distinguish between the deep hole and the shallow hole. Nut rotation auxiliary tool.

4. The nut rotation assist tool according to claim 1 or 2, A protrusion and / or a recess is formed on the peripheral wall surface of the main body portion in correspondence with at least one of the deep hole and the shallow hole. Nut rotation auxiliary tool.

5. The nut rotation assist tool according to claim 1 or 2, The peripheral wall surface of the main body is provided with protrusions and / or grooves having different lengths corresponding to the difference in depth between the deep hole and the shallow hole, corresponding to the deep hole and the shallow hole. Nut rotation auxiliary tool.

6. The nut rotation assist tool according to claim 1 or 2, The operated portion has a rectangular pillar portion, and a rectangular hole portion is formed in the rectangular pillar portion. Nut rotation auxiliary tool.

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