Binding band and nut loosening stopper

Abstract

To prevent nuts from being loosened and falling under a situation where an impact or vibration etc. intermittently continues without fail.SOLUTION: The invention relates to a binding band 11 which is wound around nuts 6 which are respectively screwed into bolts 2 protruding from a rotary hub 1 to attach a rotating body 3 to the rotary hub 1. The binding band 11 includes: a belt-like metallic band part 12; a cylindrical buckle part 13 attached to one end side 12a in a longitudinal direction of the band part 12; and a cylindrical sleeve part 14 which holds the other end side 12b in the longitudinal direction, which is inserted into the buckle part 13, of the band part 12.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a cable tie and a nut loosening prevention device. [Background technology]

[0002] Patent Document 1 discloses a rotation prevention device that includes a number of mounting parts that are pressed into the outer periphery of the wheel nut one by one and a connecting part that connects these mounting parts to each other in order to prevent the wheel nut from loosening due to shocks, vibrations, etc. while driving, and the mounting parts and the connecting part are integrally molded from a soft material such as resin.

[0003] According to the anti-rotation device in Patent Document 1, even if there is an angular phase difference between the wheel nuts to be connected, the flexibility of the connecting part makes it possible to absorb the phase difference and press the mounting part into the wheel nut. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 6-43330 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the fact that the connecting part is made of a soft material means that the restraining force of the connecting part on the mounting part is weak, allowing the mounting part to rotate or displace, resulting in the problem that it is difficult to reliably prevent the wheel nuts from loosening and falling off.

[0006] This type of problem is not specific to wheel nuts; it can occur in any rotating body (such as a pulley or roller) that is fixed to a rotating hub by multiple sets of bolts and nuts, provided that the rotating body is subjected to continuous, intermittent shocks, vibrations, etc. [Means for solving the problem]

[0007] The present invention has been made in consideration of the current situation as described above, and has as its technical object to provide a structure that prevents a fastened nut from loosening and falling off.

[0008] The present invention includes a cable tie and a nut loosening prevention device, and typical configurations are specified in each claim. The invention of claim 1 relates to a cable tie that is wound around a plurality of nuts that are screwed onto bolts protruding from a rotating hub to attach a rotor to the rotating hub, and includes a belt-shaped metal band portion, a cylindrical buckle portion attached to one longitudinal end of the band portion, and a cylindrical sleeve portion that holds the other longitudinal end of the band portion that is inserted into the buckle portion.

[0009] The invention of claim 2 is a cable tie as described in claim 1, in which an engagement groove extending along the nut rotation direction is formed on the side surface of each nut, and when fastened, the engagement grooves of each nut, which are arranged at equal intervals along the circumferential direction around the rotation center of the rotating body, fit from the radially outside and are tightened into a loop.

[0010] The invention of claim 3 relates to a nut loosening prevention device, which comprises a number of nuts that are screwed onto bolts protruding from a rotating hub and attached to the rotating hub, and which have engagement grooves formed on their side surfaces that extend along the direction of nut rotation, and a cable tie as described in claim 1 or 2.

[0011] The invention of claim 4 relates to a nut loosening prevention device as described in claim 3, and is equipped with a nut cap having at least two openings formed therein to allow the cable ties fitted into the engagement grooves of each nut to pass through. Effect of the Invention

[0012] According to the present invention, the three structures of the engagement of the binding band with the engagement groove of each nut, the fitting of the nut cap to each nut, and the insertion of the binding band into the opening of the nut cap work together to simply and accurately prevent the nuts from loosening (moving out of place). Therefore, the nuts can be prevented from loosening and falling off, and thus a high prevention effect can be achieved against the falling off of the rotating body. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is an exploded perspective view of the wheel and axle hub. [Diagram 2] 5A to 5D are explanatory views of a wheel nut according to an embodiment, in which (a) is a front view, (b) is a plan view, (c) is a bottom view, and (d) is a right side view. [Diagram 3] 10A to 10D are explanatory diagrams of a wheel nut according to another example in which the position of the engagement groove is changed, where (a) is a front view, (b) is a plan view, (c) is a bottom view, and (d) is a right side view. [Figure 4] FIG. 2 is an external perspective view of a nut cap. [Diagram 5] 1A is an explanatory diagram of a nut cap, where (a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a left side view, (e) is a right side view, (f) is a rear view, (g) is a cross-sectional view taken from the direction g-g of (a), and (h) is a cross-sectional view taken from the direction h-h of (a). [Figure 6] FIG. 2A is an explanatory diagram showing the attached state of the nut loosening prevention device, and FIG. [Figure 7] 1A is an enlarged cross-sectional view of a nut loosening prevention device applied to a wheel for a single tire, FIG. 1B is an enlarged cross-sectional view with the nut cap broken away, and FIG. 1C is a partially enlarged cross-sectional view of FIG. [Figure 8] 1A is an enlarged cross-sectional view of a nut loosening prevention device applied to a wheel for dual tires, FIG. 1B is an enlarged cross-sectional view with the nut cap broken away, and FIG. 1C is a partially enlarged cross-sectional view of FIG. [Figure 9] FIG. [Figure 10]FIG. 4 is an enlarged side view showing the attached state of the cable tie. [Figure 11] 10A to 10C are explanatory diagrams showing an example of a procedure for bending a cable tie. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Next, an embodiment of the present invention will be described in detail with reference to the drawings. In the embodiment of the present invention, a case where wheels 3 are mounted on an axle hub 1 in a vehicle such as a truck or a bus is exemplified. A vehicle generally has at least four wheels 3. The wheels 3 correspond to a rotating body, and the axle hub 1 corresponds to a rotating hub.

[0015] As shown in Fig. 1, a plurality of wheel bolts 2 protruding axially outward are attached to a flange portion of an axle hub 1 provided on a vehicle, and are arranged at equal intervals concentrically about the axial center of the axle hub 1. Bolt insertion holes 4 corresponding to each wheel bolt 2 are formed in a wheel 3, and are arranged at equal intervals concentrically about the center of rotation.

[0016] The wheel 2 is attached to the axle hub 1 by placing the wheel 3 on the axle hub 1, inserting each wheel bolt 2 of the axle hub 1 into each corresponding bolt insertion hole 4, and screwing the wheel nut 6 onto the wheel bolt 2 with a predetermined torque using, for example, a torque wrench.

[0017] The mounting structure of the wheel 3 to the axle hub 1 includes a flat seat type conforming to ISO (International Standard) standards and a spherical seat type conforming to JIS (Japanese Standard) standards. The embodiment shown in Figures 2 to 8 illustrates the flat seat type conforming to the ISO standards, and a case in which the wheel 3 is mounted to the axle hub 1 with eight sets of wheel bolts 2 and wheel nuts 6.

[0018] In addition, whether the ISO standard flat seat type or the JIS standard spherical seat type is used, the wheel 3 may be attached to the axle hub 1 with ten sets of wheel bolts 2 and wheel nuts 6. In the following, an embodiment in which the present invention is applied to the ISO standard flat seat type will be described, but it goes without saying that the present invention can be similarly applied to the JIS standard spherical seat type.

[0019] 2 to 8, the nut loosening prevention device 5 includes a plurality of wheel nuts 6 that are screwed onto wheel bolts 2 protruding from the axle hub 1 to attach a wheel 3 to the axle hub 1, and a cable tie 11 that is wrapped around the plurality of wheel nuts 6. A nut cap 20 is placed on the outer periphery of each wheel nut 6 (which may also be called a nut body 7).

[0020] The wheel nut 6 of the embodiment is of a flat seat type based on the ISO standard, and includes a nut body 7 having a polygonal shape (hexagonal in this case) in a plan view with a screw hole 9, and a circular flange-shaped flat seat 8 attached to the seat side of the nut body 7. The wheel nut 6 of the embodiment is made of a metal such as steel, stainless steel, a chrome alloy, or an aluminum alloy.

[0021] An engagement groove 10 extending in the nut rotation direction (circumferential direction) is formed on the side peripheral surface of the wheel nut 6, i.e., the side peripheral surface of the nut body 7. As shown in Figures 2 and 3, the position where the engagement groove 10 is formed on the nut body 7 may be closer to the top surface or closer to the flat seat 8. The shape of the engagement groove 10 may be, for example, an L-shaped notch, but it is more preferable if it is a recessed groove with walls on both sides in the height direction.

[0022] In the embodiment, the engagement groove 10 is formed over the entire periphery of the side peripheral surface of the wheel nut 6 (nut body 7). The engagement groove 10 may be formed by cutting out at least the side peripheral corner 7a of the wheel nut 6 (nut body 7) and may be in a form in which the groove does not exist near the center of the side peripheral surface (such that the engagement groove 10 extends intermittently on the side peripheral surface of the wheel nut 6 (nut body 7)).

[0023] The cable tie 11 of the embodiment is made of a metal such as steel, stainless steel, a chromium alloy, or an aluminum alloy, and includes a belt-shaped band portion 12 and a cylindrical buckle portion 13 attached to one longitudinal end of the band portion 12. The basic structure of the cable tie 11 is similar to that of existing cable tie devices, although the length of the band portion 12 is long, for example, about 1 m.

[0024] A locking projection 15 is provided inside the buckle portion 13. The locking projection 15 is configured to come into contact with the wide surface of the band portion 12 inserted into the buckle portion 13, allowing the other end side of the band portion 12 in the longitudinal direction to be inserted into the buckle portion 13 to form a loop, but to prevent the other end side of the band portion 12 in the longitudinal direction from being pulled out of the buckle portion 13 as it is.

[0025] A sleeve portion (band holder) 14 may be attached to the band portion 12 to pull the other end of the band portion 12 in the longitudinal direction so as to overlap with the one end of the band portion 12 in the longitudinal direction. The structure of the cable tie 11 in the embodiment is merely an example, and it is of course possible to adopt a cable tie 11 having a different structure.

[0026] For example, when the wheel nut 6 is screwed onto the wheel bolt 2 with a predetermined torque using a torque wrench or the like and the wheel 3 is attached to the axle hub 1 (this state is sometimes referred to as "fastened" in this specification), and the cable tie 11 is wrapped in a loop around the group of wheel nuts 6, the groove depth dimension Dg of the portion of each engagement groove 10 corresponding to the side corner portion 7a of the wheel nut 6 (nut body 7) is set to be larger than the thickness dimension Tb of the band portion 12 when viewed from the bolt axial direction when fastened (Dg>Tb).

[0027] With this configuration, even if the wheel nut 6 tries to loosen due to shock, vibration, or the like, the band portion 12 of the cable tie 11 is caught in the engagement groove 10, so the wheel nut 6 cannot move (loosen) in the bolt axial direction (longitudinal direction of the wheel bolt 2). In other words, the engagement relationship between the engagement groove 10 and the band portion 12 prevents each wheel nut 6 from loosening (moving out of place). This prevents each wheel nut 6 from loosening and falling off the wheel bolt 2, and thus provides a high level of prevention against the wheel 3 falling off.

[0028] The nut cap 20 of the embodiment is made of synthetic resin such as polyurethane resin, polyvinyl chloride resin, polyethylene terephthalate, polycarbonate, acrylic resin, nylon resin, polyethylene resin, or fluoroethylene resin, and is formed in a ring shape surrounding the entire side surface of the wheel nut 6 (nut body 7). The material of the nut cap 20 may be metal. The shape of the nut cap 20 is not limited to a ring shape, and may be a lid shape with one end open.

[0029] The inner peripheral surface of the nut cap 20 is formed with an uneven portion 21 consisting of repeated circumferentially continuous recesses 21a and protrusions 21b. As shown in Fig. 4 and Fig. 5(a) and (c), the inner peripheral surface of the nut cap 20 of the embodiment is in the shape of a twenty-four-pointed star in plan view due to the presence of the uneven portion 21. When the nut cap 20 is placed on the outer periphery of the nut body 7, each of the peripheral side corners 7a of the nut body 7 fits into the corresponding recesses 21a of the nut cap 20, and the wheel nut 6 and the nut cap 20 are held so that they cannot rotate relative to each other.

[0030] The inner peripheral surface of the nut cap 20 is not limited to a twenty-four-sided star shape in plan view, but may be a dodecagonal, octagonal, or tridecagonal shape. The inner peripheral surface of the nut cap 20 may be a star shape having a number of sides that is a multiple of the polygonal shape of the nut body 7. The nut cap 20 may be configured to be press-fitted onto the outer periphery of the wheel nut 6.

[0031] 7 and 8, the width dimension Wc of the nut cap 20 (see FIGS. 5(b)(d)(e)(f)) is set to be larger than the groove width dimension Wg of the engagement groove 10 formed in the nut body 7 (Wc>Wg). Therefore, by covering the outer periphery of the nut body 7 with the nut cap 20, it is possible to cover and hide the engagement groove 10 of the nut body 7 with the nut cap 20.

[0032] The nut cap 20 has at least two groove- or hole-shaped openings 22 formed therein to allow the band portion 12 of the cable tie 11 fitted in the engagement groove 10 of the nut body 7 to pass through. Each opening 22 in the embodiment is formed by cutting out a long groove on the side of the nut cap 20 facing the flat seat 8 of the wheel nut 6 (the side facing the wheel 3). The nut cap 20 in the embodiment has the openings 22 cut out at three locations at equal intervals along the circumferential direction.

[0033] The inner peripheral surface of the nut cap 20 of the embodiment is a twenty-four-pointed star in plan view due to the presence of the uneven portion 21. In addition, the nut cap 20 is formed with openings 22 cut out at three locations at equal intervals along the circumferential direction. Therefore, when the cable tie 11 is wound around the wheel nuts 6 in a loop shape, the band portion 12 of the cable tie can pass through the adjacent openings 22, 22 of the nut cap 20 fitted around each wheel nut 6, regardless of the phase state of the nut rotation direction of each wheel nut 6. In other words, after the cable tie 11 is wound around the wheel nuts 6, the nut cap 20 can be easily fitted onto the outer periphery of each wheel nut 6.

[0034] The openings 22 are not limited to the notched groove shape as in the embodiment, but may be elongated holes. It is sufficient to form at least two openings 22 in the nut cap 20 (four or more openings may be formed). The size of the opening phase θ (see FIG. 4(b)) of the openings 22 is not particularly important because it depends on the number of openings 22. In the case of the embodiment, it is more preferable to set the opening phase θ of the openings 22 in the range of, for example, about 30° to 90°.

[0035] The width dimension Wo (see Figures 5(b)(d)(e)(f)) of each opening 22 is set larger than the width dimension Wb of the band portion 12 (Wo>Wb) to make it easier to insert the band portion 12 of the cable tie 11.

[0036] As shown in Figs. 4 to 8, an inwardly protruding locking rib 23 is formed on the inner peripheral surface of the nut cap 20 so as to be able to hook and engage with a front edge portion 10a corresponding to the side peripheral corner portion 7a of the engagement groove 10 of the wheel nut 6 (nut body 7) into which the nut cap 20 is fitted. In this embodiment, the inwardly protruding locking rib 23 is integrally formed in a widthwise middle portion of a recess 21a formed in a portion of the inner peripheral surface of the nut cap 20 where there is no opening 22. The width dimension Wl of the locking rib 23 is set smaller than the groove width dimension Wg of the engagement groove 10 (Wl <Wg)。

[0037] When the nut cap 20 is placed on the outer periphery of the nut body 7 and each of the peripheral side corners 7a of the nut body 7 is fitted into the corresponding recesses 21a of the nut cap 20, the locking rib 23 located at the middle of the width of the recess 21a is forcibly engaged (drops in and gets caught) with the front edge portion 10a of the engagement groove 10 that corresponds to the peripheral side corner 7a. As a result, the nut cap 20 is attached to the nut body 7 so that it cannot be removed (see Figs. 6(b), 7(b) and 8(b)).

[0038] For example, when wheel nuts 6 are screwed onto wheel bolts 2 with a predetermined torque using a torque wrench or the like and wheel 3 is attached to axle hub 1 and fastened, the wheel nuts 6 are arranged at equal intervals in the circumferential direction about the center of rotation of wheel 3, as is clear from the relationship with each wheel bolt 2 of axle hub 1 and each bolt insertion hole 4 of wheel 3. When fastened in this manner, cable tie 11 is tightened (wrapped around, see FIG. 6(a)) in a loop shape so that band portion 12 of cable tie 11 fits into engagement groove 10 of each wheel nut 6 from the radial outside of wheel 3.

[0039] Then, the nut cap 20 is aligned so that the band portion 12 passes through adjacent openings 22, 22 of the nut cap 20, and the nut cap 20 is fitted onto the outer periphery of the nut body 7 of the corresponding wheel nut 6, and each of the side corners 7a of the nut body 7 is fitted into the corresponding recesses 21a of the nut cap 20. Then, the locking rib 23 located at the middle of the width of the recess 21a falls into and gets caught on the front edge portion 10a of the engagement groove 10 that corresponds to the side corners 7a, and the nut cap 20 is attached to the nut body 7 so that it cannot be removed (see Figures 6(b), 7(b) and 8(b)).

[0040] In addition, if the openings 22 are hole-shaped, the nut caps 20 are attached to the wheel nuts 6, and then the cable ties 11 are inserted into each opening 22 and wound in a loop shape.

[0041] According to the above configuration, even if each wheel nut 6 attempts to loosen due to shock, vibration, etc. during driving, the band portion 12 of the tie band 11 is caught in the engagement groove 10, so that each wheel nut 6 is held in place so that it cannot come off the corresponding wheel bolt 2.

[0042] That is, the engagement between the engagement groove 10 of each wheel nut 6 and the band portion 12 of the cable tie 11 prevents each wheel nut 6 from loosening (disengaging and moving). This makes it possible to prevent each wheel nut 6 from loosening and falling off the wheel bolt 2.

[0043] In addition, each wheel nut 6 is covered with a nut cap 20, and the portion of the band portion 12 wound around the wheel nut 6 is covered with the nut cap 20, so that the band portion 12 can be reliably prevented from falling off the engagement groove 10.

[0044] Furthermore, if the wheel nut 6 attempts to loosen due to impact, vibration, etc. while driving, the wheel nut 6 and the nut cap 20 cannot rotate relative to each other and will attempt to rotate together. However, if this occurs, one of the openings 22 of the nut cap 20 will inevitably come into contact with the band portion 12 of the cable tie 11, preventing the nut cap 20 and therefore the wheel nut 6 from loosening.

[0045] That is, the three structures of the engagement between the engagement groove 10 and the cable tie 11, the fitting of the nut cap 20 onto the wheel nut 6, and the insertion of the cable tie 11 into the opening 22 of the nut cap 20 work together to simply and accurately prevent the wheel nuts 6 from loosening (coming off and moving). Therefore, by adopting the embodiment, a high prevention effect against the wheel 3 falling off can be achieved.

[0046] In the embodiment, the opening 22 is cut out and formed on the side of the nut cap 20 facing the flat seat 8 of the wheel nut 6 (the side facing the wheel 3), so that the cable tie 11 can be wrapped in a loop around the wheel nuts 6, and then the nut cap 20 can be fitted onto each wheel nut 6. This significantly improves the ease of attachment and detachment of the nut loosening prevention device 5, including the nut cap 20.

[0047] In the embodiment, the band portion 12 of the cable tie 11 is clamped locally (at multiple locations) by the combination of the wheel nuts 6 and the nut caps 20. Therefore, even if the cable tie 11 breaks or is damaged, the multiple pairs of wheel nuts 6 and nut caps 20 hold the cable tie 11 in place without letting it escape, thereby reliably preventing the cable tie 11 from falling off due to breakage, etc.

[0048] In addition, since the locking rib 23 protruding inward from the inner surface of the nut cap 20 is forcibly engaged with the front edge portion 10a of the engagement groove 10 of the wheel nut 6 (nut body 7) that corresponds to the side corner portion 7a, there is extremely little risk of the nut cap 20 falling off the wheel nut 6.

[0049] It is desirable to tighten the cable tie 11 by pulling the other end of the band portion 12 in the direction that loosens the wheel nut 6. In the embodiment (ISO standard), the tightening direction of the wheel nut 6 is a right-handed thread for both the left and right wheels 3 of the vehicle, so it is good to tighten the other end of the band portion 12 by pulling it in the counterclockwise direction, as shown in Fig. 6(a).

[0050] In this way, when the brakes are applied, a load is applied to the other longitudinal end of band portion 12 in the direction in which it is inserted into buckle portion 13. In other words, a load is applied in the direction in which cable tie 11 is tightened more, so that cable tie 11 can be prevented from falling off.

[0051] On the other hand, when the spherical seat method of the JIS standard is adopted, the tightening direction of the wheel nut 6 is a left-handed thread for the left wheel 3 of the vehicle, and a right-handed thread for the right wheel 3. Therefore, it is preferable to tighten the other end of the band portion 12 in the longitudinal direction by pulling it clockwise for the left wheel 3, and to tighten the other end of the band portion 12 in the longitudinal direction by pulling it counterclockwise for the right wheel 3, as shown in Fig. 6(a).

[0052] In this way, when braking, a load is applied to the other longitudinal end of the band portion 12 in the direction of insertion into the buckle portion 13 on either the left or right wheel 3. In other words, a load is applied in the direction of tightening the cable tie 11 more, which makes it possible to prevent the cable tie 11 from falling off.

[0053] As shown in Figures 7(a)(b) and 8(a)(b), the nut loosening prevention device 5 of the embodiment can be used for a wheel 3 for a single tire, and can also be used for wheels 3, 3 for dual tires. In the case of the flat seat type of the ISO standard, the length of each wheel bolt 2 becomes longer in the case of wheels 3, 3 for dual tires.

[0054] If at least one of the three faces constituting the engagement groove 10 is roughened by, for example, buffing or blasting, or if the inner surface of the band portion 12 in the loop state and at least one of the end faces on both sides of the inner surface are roughened, the frictional force increases when the engagement groove 10 of each wheel nut 6 is engaged with the band portion 12 of the cable tie 11, which is more effective in preventing loosening of each wheel nut 6. Of course, both the engagement groove 10 and the band portion 12 may be roughened, or only one of them may be roughened.

[0055] Also, instead of the above-mentioned surface roughening treatment, the sleeve portion 14 may be made of synthetic resin such as a silicone tube, and configured to cover substantially the entire length of the band portion 12 (the band portion 12 is inserted into the sleeve portion 14). In this case, the buckle portion 13 and the other longitudinal end side of the band portion 12 will be exposed by protruding from each longitudinal end of the sleeve portion 14.

[0056] With this configuration, the frictional force is increased by the engagement between the engagement groove 10 of each wheel nut 6 and the sleeve portion 14, effectively preventing loosening of each wheel nut 6. When fastening the cable tie, the band portion 12 is inserted into the sleeve portion 14, so that the cable tie can be fastened smoothly with little frictional resistance.

[0057] The cable tie 11 will be described in detail. The cable tie 11 includes a band-shaped metal band portion 12, a cylindrical buckle portion 13 attached to one longitudinal end side 12a of the band portion 12, and a cylindrical sleeve portion 14 that holds the other longitudinal end side 12b of the band portion 12 inserted into the buckle portion 13 (see Figs. 9 and 10). The band-shaped metal band portion 12 has a width (wide surface) of about 5 mm and a thickness of about 0.5 mm, for example.

[0058] The buckle portion 13 is formed in a cylindrical shape, and both sides are open. The band portion 12 is inserted from the entrance 13a of the buckle portion 13 toward the exit 13b. The entrance 13a opens toward one end side 12a in the longitudinal direction of the band portion 12. The exit 13b opens toward the other end side 12b (sleeve portion 14 side) in the longitudinal direction of the band portion 12. The other end side 12b in the longitudinal direction of the band portion 12 is inserted from the entrance 13a of the buckle portion 13 toward the exit 13b to form a loop. The outer circumferential side of the buckle portion 13 bulges so that the inner diameter becomes larger from the entrance 13a toward the exit 13b, forming a bulging portion 13c. That is, the inner diameter of the bulging portion 13c is larger on the exit 13b side than on the entrance 13a side.

[0059] A spherical locking projection 15 is inserted into the buckle portion 13 (bulge portion 13c). The locking projection 15 functions as a wedge between the band portion 12 and the inner surface of the bulge portion 13c (buckle portion 13). The locking projection 15 can be inserted only from the outlet 13b side of the buckle portion 13. The locking projection 15 can move within the bulge portion 13c in conjunction with the movement of the band portion 12. A stopper portion 13d is formed in the bulge portion 13c to keep the inserted locking projection 15 within the buckle portion 13 (bulge portion 13c).

[0060] When forming a loop of the cable tie 11, it is easy to insert the band portion 12 into the buckle portion 13 and tighten it (pulling the other end side 12b of the band portion 12 in the longitudinal direction from the entrance 13a to the exit 13b). The locking protrusion 15 moves toward the exit 13b side of the bulging portion 13c (the side with a larger inner diameter than the entrance 13a) in conjunction with the movement of the band portion 12 being inserted into the buckle portion 13. Since the inner diameter of the bulging portion 13c on the exit 13b side is larger than the outer diameter of the locking protrusion 15, the locking protrusion 15 can move freely without being caught between the inner surface of the bulging portion 13c on the exit 13b side and the band portion 12. Therefore, the locking protrusion 15 does not stop the insertion of the band portion 12, and the band portion 12 can be tightened smoothly.

[0061] Conversely, it is difficult to pull out the band portion 12 inserted through the buckle portion 13 (pulling the other end side 12b in the longitudinal direction of the band portion 12 from the exit 13b toward the entrance 13a). The locking projection 15 moves toward the entrance 13a side of the bulging portion 13c (the side with a smaller inner diameter than the exit 13b) in conjunction with the movement of the band portion 12 being pulled out of the buckle portion 13. Since the inner diameter of the entrance 13a side of the bulging portion 13c is smaller than the outer diameter of the locking projection 15, the locking projection 15 is sandwiched and caught between the band portion 12 and the inner surface of the entrance 13a side of the bulging portion 13c. Therefore, the locking projection 15 becomes a wedge between the band portion 12 and the inner surface of the bulging portion 13c (buckle portion 13), preventing the band portion 12 from being pulled out of the buckle portion 13.

[0062] In this way, by providing the buckle portion 13 and the locking projection 15 on the band portion 12, the band portion 12 is fastened by the buckle portion 13 so that it cannot easily come off, but the band portion 12 inserted into the buckle portion 13 is configured not to be easily pulled out of the buckle portion 13.

[0063] The sleeve portion 14 is formed in a cylindrical shape, and the band portion 12 can be inserted through openings on both sides. The sleeve portion 14 is attached to one longitudinal end side 12a of the band portion 12 adjacent to the buckle portion 13 (the outlet 13b side). The sleeve portion 14 overlaps and holds the other longitudinal end side 12b on the one longitudinal end side 12a by inserting the other longitudinal end side 12b of the band portion 12, which has been inserted into the buckle portion 13, into the sleeve portion 14.

[0064] In the embodiment, for example, the buckle portion 13 and the sleeve portion 14 are attached to the band portion 12 in the following procedure. First, the longitudinal end side 12a of the band portion 12 is inserted into the sleeve portion 14. Next, the longitudinal end side 12a inserted into the sleeve portion 14 is inserted from the exit 13b of the buckle portion 13 toward the entrance 13a. Furthermore, the longitudinal end side 12a protruding from the buckle portion 13 is folded toward the back side of the bulging portion 13c of the buckle portion 13 and inserted into the sleeve portion 14. Finally, the longitudinal end side 12a protruding from the sleeve portion 14 is folded about 90 degrees to 180 degrees toward the buckle portion 13 (see Figs. 9 and 10). The remaining portion of the folded longitudinal end side 12a is cut off. Note that the procedure for attaching the buckle portion 13 and the sleeve portion 14 to the band portion 12 is not limited to the embodiment.

[0065] In the embodiment, an example of a procedure for forming a loop by tying the cable tie 11 will be described. First, the other longitudinal end side 12b of the band portion 12 is inserted from the entrance 13a of the buckle portion 13 toward the exit 13b. Next, the other longitudinal end side 12b inserted into the buckle portion 13 is inserted into the sleeve portion 14. Finally, the other longitudinal end side 12b protruding from the sleeve portion 14 is folded approximately 90 to 180 degrees toward the bulging portion 13c of the buckle portion 13 (see Figs. 9 and 10). The remaining portion of the folded other longitudinal end side 12b is cut off. Note that the procedure for forming a loop by tying the cable tie 11 is not limited to the embodiment.

[0066] For example, if the sleeve portion 14 is not provided on the band portion 12, the bending fulcrum of the band portion 12 becomes the buckle portion 13, and a load is applied directly to the buckle portion 13. This may cause the buckle portion 13 to break and fall off from the band portion 12. However, by providing the sleeve portion 14 adjacent to the buckle portion 13, the bending fulcrum of the band portion 12 becomes the sleeve portion 14, and a load is not applied directly to the buckle portion 13, which can prevent the buckle portion 13 from breaking and falling off from the band portion 12.

[0067] In the embodiment, an example of a procedure for bending the band portion 12 will be described. For example, when bending the other longitudinal end side 12b of the band portion 12, the other longitudinal end side 12b is pinched with a pair of T-shaped pliers 16 with a bifurcated tip (see FIG. 11(a)), the T-shaped pliers 16 is twisted and rotated (see FIG. 11(b)), and the other longitudinal end side 12b pinched by the T-shaped pliers 16 is bent toward the bulging portion 13c of the buckle portion 13 by about 90 to 180 (see FIG. 11(c)). In this way, by using the T-shaped pliers 16 or the like, the band portion 12 can be easily bent. Note that the procedure for bending the band portion 12 is not limited to that in the embodiment.

[0068] After the band portion 12 is inserted into the sleeve portion 14, the sleeve portion 14 is crushed and fixed with pliers or the like (see FIG. 10). This causes the band portion 12 to be sandwiched and fixed within the sleeve portion 14, preventing the band portion 12 from being pulled out of the sleeve portion 14.

[0069] The length, width, thickness, etc. of the band portion 12 can be appropriately changed without being limited to the embodiment. In addition, the buckle portion 13, the sleeve portion 14, and the locking projection 15 are preferably made of metal such as steel, stainless steel, a chrome alloy, or an aluminum alloy. The shape of the buckle portion 13 or the sleeve portion 14 may be appropriately changed according to the shape (width or thickness) of the band portion 12.

[0070] The configuration of each part in the present invention is not limited to the illustrated embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0071] In the embodiment of the present invention, an example is shown of a wheel 3 being attached to an axle hub 1 in a vehicle such as a truck or bus, but the present invention is not limited to this and can be applied to, for example, the wheels of passenger cars and various work vehicles, and to any rotating body (such as a pulley or roller) that is fixed to a rotating hub with multiple sets of bolts and nuts. [Explanation of symbols]

[0072] 1 Axle hub (rotating hub) 2 Wheel bolts 3 Wheel (rotating body) 5 Nut locking device 6 Wheel nuts 7 Nut body 7a Side peripheral corner 10 Engagement groove 10a Front edge 11 Cable ties 12 Band 13 Buckle section 14 Sleeve section 15 Locking protrusion 20 Nut Cap 21 Uneven part 21a Recess 21b Convex part 22 Opening 23 Retaining rib

Claims

1. A cable tie that is wound around a number of nuts that are screwed onto bolts protruding from a rotating hub to attach a rotating body to the rotating hub, A belt-shaped metal band portion; A cylindrical buckle portion attached to one end side of the band portion in the longitudinal direction; a cylindrical sleeve portion that holds the other longitudinal end side of the band portion that is inserted into the buckle portion; Equipped with cable ties.

2. An engagement groove is formed on the side peripheral surface of each nut, the engagement groove extending along the nut rotation direction, When fastened, the nuts are fitted from the outside in the radial direction into the engagement grooves of the nuts arranged at equal intervals along the circumferential direction with respect to the rotation center of the rotating body, and are tightened in a loop shape. The cable tie according to claim 1.

3. A plurality of nuts that are attached to the rotating hub by being screwed onto bolts protruding from the rotating hub, the nuts having engagement grooves formed on their side peripheral surfaces and extending along the nut rotation direction; A cable tie according to claim 1 or 2, A nut loosening prevention device.

4. A nut cap having at least two openings through which the cable tie fitted in the engagement groove of each nut passes; The nut loosening prevention device according to claim 3, further comprising:

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