JP2018179166A - Anti-loosening tool and anti-loosening structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anti-loosening tool that can suppress loosening of a bolt and a nut without processing the bolt and the nut, and to provide an anti-loosening structure.SOLUTION: An anti-loosening tool 20 includes a ring part 23 into which a fastening part is inserted when the fastening part represents a head of a bolt 10 or a nut, and which forms an engagement hole 21 engaging with the fastening part. The ring part 23 is formed with a through-hole 22 on an outside of the engagement hole 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bolt and nut locking device and locking structure.

  For example, in Patent Document 1, a wire is passed through a through hole formed in the head of two bolts so that tension acts in the tightening direction of the two adjacent bolts, and the looseness of the two bolts is suppressed. Structure is disclosed.

Unexamined-Japanese-Patent No. 2000-18225

  However, in order to employ | adopt the above locking structures, it is necessary to form a through-hole in the head of a bolt, and the subject that an existing bolt can not be used as it is. In addition, such a fact is not only the locking of the bolt but also the locking of the nut.

  The present invention has been made in view of these circumstances. It is an object of the present invention to provide a locking device and a locking structure capable of suppressing the loosening of a bolt and a nut without processing the bolt and the nut.

  The locking device for solving the above problems comprises a ring portion into which the fastening component is inserted when the head or nut of the bolt is a fastening component, and an engagement hole is formed to be engaged with the fastening component. In the ring portion, a through hole is formed outside the engagement hole.

  According to the above configuration, the engagement part of the ring portion is engaged with the fastening part, and the fastening part and the locking member can be integrated. Then, a connecting member such as a wire is provided with a through hole of the locking member and a member (hereinafter, also referred to as a “fixing member”) which is provided at a position apart from the fastening part and which is relatively hard to move with respect to the fastening part The locking device can be made difficult to rotate by connecting at Therefore, loosening of the bolt and the nut can be suppressed without processing the bolt and the nut.

  Further, in the above-mentioned lock, it is preferable that the through hole is provided in an arc shape centering on an axis of the engagement hole.

  When the through hole is positioned on a straight line connecting the center of the engagement hole of the locking member and the fixing member, the connection member can connect the locking member and the fixing member in the shortest distance. Then, rotation of the locking device around the axis of the engagement hole is suppressed, and loosening of the bolt and nut engaged with the locking device is suppressed.

  On the other hand, when the through hole is not located on a straight line connecting the center of the engagement hole of the locking member and the fixing member, the connecting member can not connect the locking member and the fixing member in the shortest distance. Thus, the locking member is allowed to rotate about the axis of the engagement hole unless the connecting member is a non-contractible member. In addition, the longer the distance from the straight line connecting the center of the engagement hole of the locking member and the fixing member to the through hole, the easier it is for the fastening part to rotate.

  In this respect, according to the above configuration, since the through hole is formed in an arc shape, the through hole can be easily positioned on a straight line connecting the center of the engagement hole of the locking member and the fixing member. That is, the loosening of the bolt and the nut engaged with the locking member can be further suppressed at the point that the connecting member easily connects the locking member and the fixing member at the shortest distance.

  Further, in the above-mentioned locking member, it is preferable that a cross-sectional shape in the axial direction of the engagement hole is a regular hexagon, and a formation angle of the through hole about the axis of the engagement hole is 60 degrees or more.

  When engaging a locking device with a hexagonal bolt or a hexagonal nut, a straight line connecting the center of the locking hole of the locking device and the fixing member, provided that the formation angle around the axis of the engaging hole in the through hole is at least 60 degrees. A through hole can be located on the top. Therefore, according to the above-mentioned composition, it can be considered as a suitable locking device for a hexagon bolt or a hexagon nut.

  Further, in the above-mentioned locking device, it is preferable that a plurality of the through holes are formed in the ring portion at intervals around the axis of the engagement hole.

  According to the above configuration, since a plurality of through holes are formed at intervals around the axis of the engagement hole, any through hole is positioned on a straight line connecting the center of the engagement hole of the locking member and the fixing member. It becomes easy to do. That is, the loosening of the bolt and the nut engaged with the locking member can be further suppressed at the point that the connecting member easily connects the locking member and the fixing member at the shortest distance.

  Further, in the above locking stopper, the through hole may be opened at one side in the axial direction of the engagement hole and at the outer side in the radial direction orthogonal to the axial direction of the engagement hole in the ring portion. preferable.

  When the through hole is opened only in the axial direction of the engagement hole, the connecting member passing through the through hole of the locking member engaged with the fastening component interferes with the member targeted for fastening of the fastening component. there is a possibility. According to this point and the above configuration, in the ring portion, the connecting member can be passed through the outside in the radial direction orthogonal to the axial direction of the engagement hole. Therefore, it is possible to suppress that the connecting member passing through the through hole interferes with the member to which the fastening component is to be fastened.

  Further, a locking structure for solving the above problems includes a first locking lock and a second locking lock as the locking lock, the through hole of the first locking lock, and the second locking lock. And a connecting portion for connecting the through hole of the locking device.

  According to the above configuration, the first locking device and the second locking device are in a state of being connected in advance by the connecting portion. For this reason, when there are fastening parts provided at intervals according to the length of the connecting portion, the operator can easily configure a locking structure of these fastening parts.

(A) is a locking structure top view according to one embodiment, (b) is a sectional view taken along the line AA. (A) is a top view of the locking member, (b) is a cross-sectional view taken along the line B-B. (A) is a top view which shows a mode that locking structure is attached to a pair of volt | bolt, (b) is CC sectional view taken on the line in FIG. The top view which shows a mode that slack of a volt | bolt is suppressed by the locking structure. The top view which shows a mode that the slack fastener which concerns on a 1st modification is attached to three bolts which have correspondence. The disassembled sectional view of the locking structure which concerns on a 2nd modification. FIG. 5 is a top view showing the loose fasteners attached to a single bolt. The top view which shows a mode that the slack fastener which concerns on a 3rd modification is attached to a single volt | bolt. (A) is a top view of the slack fastener which concerns on a 4th modification, (b) is DD sectional view taken on the line in FIG.

  Hereinafter, an embodiment of the locking structure will be described with reference to the drawings. The locking structure of the present embodiment is a locking structure that suppresses loosening of two hexagonal bolts arranged at a predetermined distance.

  As shown in FIG. 1, the locking structure 1 includes a first locking member 201 (a locking member 20), a second locking member 202 (a locking member 20), and a connecting portion 30. .

  As shown in FIGS. 1 and 2, the locking device 20 has a ring portion 23 in which an engagement hole 21 is formed in the central portion. The ring portion 23 has a substantially disc shape. The ring portion 23 is provided with a thin-walled portion 28 whose thickness in the axial direction is thinner outside the engagement hole 21 in the radial direction. The thin portion 28 is formed by being recessed from one surface to the other surface in the axial direction of the ring portion 23.

  The engagement hole 21 is formed to penetrate in the axial direction of the ring portion 23 at the center of the ring portion 23. The cross-sectional shape in the axial direction of the engagement hole 21 is a regular hexagon corresponding to the shape of the head of a hexagonal bolt. That is, the engagement hole 21 engages with the head of the hexagonal bolt by inserting the head of the hexagonal bolt as an example of the fastening component.

  Further, through holes 22 are formed in the ring portion 23 outside the engagement holes 21 in the radial direction orthogonal to the axial direction. The through hole 22 penetrates the ring portion 23 in the axial direction. Further, the through hole 22 has an arc shape centered on the axis line 210 of the engagement hole 21 in the ring portion 23. In the present embodiment, the formation angle around the axis 210 of the engagement hole 21 of the through hole 22 is approximately 60 degrees.

  Further, the through hole 22 is formed to penetrate in a portion where the thin portion 28 of the ring portion 23 is formed. In this point, the through holes 22 open on both sides in the axial direction of the ring portion 23 and on the outer side in the radial direction of the ring portion 23.

  As shown in FIG. 1, the connecting portion 30 connects the through hole 22 of the first locking device 201 and the through hole 22 of the second locking device 202. The connection part 30 should just be wire materials, such as a wire, for example. The connecting portion 30 is preferably fixed to the slack fastener 20 so as not to be removed from the through hole 22. Further, the length of the connecting portion 30 is a length corresponding to the distance between the pair of hexagonal bolts on which the locking structure 1 is mounted.

  Next, with reference to FIGS. 3 and 4, an operation when the locking structure 1 is attached to a pair of bolts 10 for fastening the flat plate 12 and the bracket 11 will be described. In FIG. 4, the loosening rotational direction of the pair of bolts 10 is indicated by solid arrows.

  As shown in FIG. 3, the locking structure 1 is attached to the pair of bolts 10 by inserting the pair of locking members 20 into the head of the pair of bolts 10. Then, when the head of the bolt 10 and the engagement hole 21 of the locking device 20 are engaged, the bolt 10 and the locking device 20 are integrated. For this reason, when the pair of bolts 10 rotate in the direction in which they are loosened together, the first locking device 201 and the second locking device 202 of the locking structure 1 are rotated.

  Here, in this embodiment, in the locking structure 1, the first locking device 201 and the second locking device 202 are connected by the connecting portion 30. For this reason, as shown in FIG. 4, for example, when one bolt 10 to which the first slack fastener 201 is attached is loosened, the first slack fastener 201 is loosened, and thereby the first slack locking is performed. When the connecting portion 30 abuts on the end portion of the through hole 22 of the tool 201, the loosening of the first loose fastener 201 is further suppressed. As a result, the loosening of one of the bolts 10 to which the first slack fastener 201 is attached is suppressed.

  According to the embodiment described above, the following effects can be obtained.

  (1) The head portion of the bolt 10 is inserted into the engagement hole 21 to be engaged with the engagement hole 21 so that the locking device 20 and the bolt 10 can be integrated. Then, by connecting the through hole 22 of the first locking member 201 and the through hole 22 of the second locking member 202 by the connecting portion 30, the first locking member 201 and the second locking member are secured. The tool 202 can be made difficult to rotate. Therefore, the loosening of the bolt 10 can be suppressed without processing the bolt 10.

  (2) Since the through hole 22 is formed in an arc shape, a straight line A connecting the center of the engagement hole 21 of the first locking member 201 and the center of the engagement hole 21 of the second locking member 202 The through holes 22 of the first locking device 201 and the second locking device 202 can be easily positioned on the top. According to this, since the length of the necessary connecting portion 30 hardly changes depending on the direction after the bolt 10 is tightened, the locking structure 1 can be easily attached to the bolt 10. Therefore, the slack of the bolt 10 engaged with the locking device 20 can be further suppressed.

  (3) When engaging the first locking device 201 and the second locking device 202 with the hexagonal bolt, if the formation angle of the through hole 22 around the axis 210 of the engaging hole 21 is at least 60 degrees, The first locking member 201 and the second locking member are located on a straight line A connecting the center of the engaging hole 21 of the first locking member 201 and the center of the engaging hole 21 of the second locking member 202. The through hole 22 of the tool 202 can be positioned. According to this, the locking structure 1 can be attached to the bolt 10 regardless of the direction after the bolt 10 is tightened. Therefore, the locking device 20 suitable for a hexagonal bolt can be obtained.

  (4) When the through hole 22 opens only in the axial direction of the engagement hole 21, the connecting portion 30 passing through the through hole 22 of the locking device 20 engaged with the bolt 10 interferes with the bracket 11 there's a possibility that. In this respect, according to the above configuration, as shown in FIG. 3B, by providing the thin-walled portion 28, in the ring portion 23, the connecting portion is provided on the outer side in the radial direction orthogonal to the axial direction of the engagement hole 21. You can pass 30. Therefore, the connecting portion 30 passing through the through hole 22 can be prevented from interfering with the bracket 11.

  (5) The first locking device 201 and the second locking device 202 are connected in advance by the connecting portion 30. Therefore, when there are bolts 10 provided at intervals according to the length of the connecting portion 30, the worker can easily configure a structure for suppressing the loosening of the bolts 10.

  Below, another embodiment of the embodiment mentioned above is described.

  -The locking structure 1 includes a first connection portion 30A for connecting three or more slack fasteners 20A and three or more slack fasteners 20A for securing three or more bolts 10. It may be a locking structure 1A according to a modification. In this case, it is preferable to appropriately change the number and formation angle of the through holes 22A according to the arrangement relationship of the three or more bolts 10.

  For example, as shown in FIG. 5, in the case of a locking structure 1A for suppressing the locking of three bolts 10 provided equidistantly to each other, through holes in adjacent locking members 20A by three connecting portions 30A. It is sufficient to connect 22A. In this case, the formation angle around the axis 210 of the through hole 22A of the locking device 20A is preferably approximately 120 degrees. According to this, regardless of the angle of the head after fastening of the bolt 10, the locking structure 1A can be attached to the bolt 10.

  The locking structure 1 may be a locking structure 1B according to a second modification in which the coupling portion 30B is engaged with the locking fastener 20B. For example, as shown in FIG. 6, the locking structure 1B includes a locking member 20B having a recess 25 formed on one side in the axial direction, and a connecting portion 30B having engaging portions 31 engaged with the recess 25 at both ends. , And may be used as the locking structure 1B. In this case, it is preferable to make the engaging portion 31 larger than the opening of the recess 25 so that the connecting portion 30B can not be easily removed from the loosening fastener 20B. Moreover, it is preferable to shape | mold the loose fastener 20B and the connection part 30B by comparatively hard resin. According to this, the engaging portion 31 of the connecting portion 30B is engaged with the recess 25 of the locking device 20B, so that the connecting portion 30B can be prevented from being removed from the loosening stopper 20B with a simple configuration.

  As shown in FIG. 7, the loosening fastener 20 may be used alone for the bolt 10 connecting the flat plate 12 and the bracket 11. In this case, it is preferable to fix the other end of the connection portion 30 whose one end is connected to the loose fastener 20 to the projection 110 or the like formed on the bracket 11. According to this, the slack of the single bolt 10 can be suppressed. However, the head of the bolt 10 is positioned so that the through hole 22 is located between the center of the engagement hole 21 of the loosening fastener 20 and the projection 110 in order to connect the loosening fastener 20 and the projection 110 in the shortest distance. It is preferable to attach the loose fastener 20 to the part.

  -As shown in FIG. 8, the slack fastener 20 may be a slack fastener 20C according to a third modification provided with a plurality of connection holes 24 to which the connection portion 30 is connected. In the loose fastener 20 </ b> C, the plurality of connection holes 24 are preferably formed at equal intervals around the engagement hole 21. According to this configuration, for example, when the locking device 20C is used alone, the center of the engagement hole 21 of the locking device 20C can be recognized without being aware of the mounting direction of the locking device 20C with respect to the head of the bolt 10. The connection hole 24 can be arranged between the and the protrusion 110. Therefore, the usability of the locking device 20 can be improved.

  -As shown in FIG. 9, the locking device 20 may be a locking device 20D according to a fourth modification in which the engagement hole 21 is an engagement hole 26 which does not penetrate through the ring portion 23. That is, the slack fastener 20D may have a cap shape.

  In the embodiment and the modification, the angular range of the arc formed by the through hole 22 may not be 60 degrees. For example, when attaching to a square bolt, the angular range of the arc formed by the through hole 22 is preferably 90 degrees. Further, even when the through hole 22 is attached to the hexagonal bolt, if the formation angle of the through hole 22 around the axis 210 of the engaging hole 21 is at least 60 degrees, the center of the engaging hole 21 of the first locking member 201; Positioning the through hole 22 of the first locking member 201 and the through hole 22 of the second locking member 202 on a straight line A connecting the center of the engagement hole 21 of the second locking member 202 it can. Therefore, the locking structure 1 can be attached to the bolt 10 regardless of the direction after the bolt 10 is tightened.

  In the above embodiment, the through hole 22 may be a part of the engagement hole 21. For example, the ring portion 23 of the through hole 22 may be axially penetrated by a part of the engagement hole 21 in the circumferential direction expanding radially outward of the engagement hole 21.

  -In the above-mentioned embodiment and modification, connecting part 30 does not need to connect locking device 20 beforehand. For example, after the pair of locking devices 20 is attached to the pair of bolts 10, the through holes 22 of the pair of locking devices 20 may be connected by the connecting portion 30. According to this, when the distance between the pair of bolts 10 is not known in advance, the through holes 22 of the pair of locking members 20 can be connected at the shortest distance. In other words, it is possible to provide a flexible locking structure.

  In the embodiment and the modification, the engagement hole 21 of the locking device 20 may be formed to engage with a nut as an example of a fastening part. According to this, the locking device 20 exerts the same effect on the nut as that on the bolt 10.

  In the embodiment and the modification, in the ring portion 23, an adhesive may be applied to the inside in the radial direction orthogonal to the axial direction of the engagement hole 21. In addition, when the bracket 11 is formed of metal, the ring portion 23 may be formed of a magnet. According to this, the detachment of the bolt 10 of the locking device 20 from the head can be suppressed.

1, 1A, 1B: locking structure 10: bolt 11: bracket 110: protrusion 12: flat plate 20, 20A to 20D: locking member 201: first locking member 202: second locking member 21: engagement Hole 210: Axis 22, 22A: Through hole 23: Ring portion 24: Connection hole 25: Recess 26: Engage hole 28: Thin-walled portion 30, 30A, 30B: Connection portion 31: Engagement portion

Claims (6)

When a bolt head or nut is used as a fastening part
A ring portion into which the fastening part is inserted and in which an engagement hole is formed to be engaged with the fastening part;
A through hole is formed on the outside of the engagement hole in the ring portion. The locking device according to claim 1, wherein the through hole is provided in an arc shape centering on an axis of the engagement hole. The cross-sectional shape in the axial direction of the engagement hole is a regular hexagon,
The locking device according to claim 2, wherein the formation angle of the through hole about the axis of the engagement hole is 60 degrees or more. 2. The locking device according to claim 1, wherein a plurality of the through holes are formed in the ring portion at intervals around an axis of the engagement hole. The said through hole is opened in the said ring part in the one side in the axial direction of the said engagement hole, and the outer side in the radial direction orthogonal to the axial direction of the said engagement hole. Locking device described in. A first locking device and a second locking device as the locking device according to any one of claims 1 to 5.
A connecting portion for connecting the through hole of the first locking member and the through hole of the second locking member.

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