JP4912782B2 - Steering lock device mounting structure - Google Patents

Description

  The present invention relates to a mounting structure of a steering lock device for locking a steering wheel of an automobile or the like.

  Conventionally, there is a structure in which the steering lock device is attached to the steering column by fixing the cover to the device body with a torsion bolt while the steering column is sandwiched between the device body and the cover of the steering lock device. For example, it is known from Patent Document 1.

  When the torque of a predetermined value or more is further applied after the bolt tightening is completed, the threaded bolt is configured such that a hexagonal threaded portion is torn off from the bolt head, and the remaining, for example, a disk-shaped The bolt head cannot be rotated with a tool or the like, thereby making it difficult to remove the steering lock device and improving the anti-theft performance of the vehicle.

  In addition, a protective wall is erected around the head of the fixing bolt such as a threaded bolt on the cover, and this protective wall prevents unauthorized access to the fixing bolt (bolt rotation operation using a chisel, etc.). The structure which has been disclosed is disclosed in FIG.

JP 58-178010 A Japanese Utility Model Publication No. 5-13867

  However, depending on the mounting position of the steering lock device, the defense wall cannot be set up due to space problems, or the steering lock device is set so that the head of the fixing bolt faces the front side. There may be. In such a case, depending on the defense wall, unauthorized access to the threaded bolt could not be prevented, and there was a problem that it was easily stolen.

  Then, this invention makes it a subject to provide the attachment structure of the steering lock apparatus which can prevent unauthorized removal of a fixing bolt and can improve anti-theft.

In order to solve the above-mentioned problem, the first aspect of the present invention is bolted to the apparatus body by a part of the apparatus body and first and second bolts inserted into bolt insertion holes provided on both sides. In the steering lock device mounting structure that is fixed by sandwiching the steering column with the cover plate
An engagement portion is provided on the outer periphery of the first bolt, and occurs when the other end of the cover plate is tightened with the second bolt after the first bolt is attached to one end of the cover plate to the apparatus body. A basic feature is that the engagement portion of the first bolt is engaged with the inner peripheral portion of the bolt insertion hole of the cover plate by the movement of the cover plate.

According to this basic feature, when the steering lock device is attached to the steering column, the engaging portion of the first bolt engages with the inner peripheral portion of the bolt insertion hole of the cover plate. Rotation is prevented, whereby unauthorized removal of the first bolt can be prevented, and anti-theft performance can be improved. In addition, it is no longer necessary to provide a protective wall on the cover plate to prevent unauthorized access to the bolt head, making it easier to secure the space for installing the steering lock device and eliminating the need for a protective wall. Cost reduction and weight reduction can also be achieved.

Further, in the steering lock device mounting structure of the present invention, the engaging portion is provided on an outer peripheral portion of a step portion provided between a bolt head portion and a screw portion of the first bolt, and the first bolt The step is in contact with the device body in a tightened state, and the interval is set so that the cover plate can move within the interval between the bolt head and the device body when the second bolt is tightened. It is .

According to this further configuration, the cover plate can be moved while the first bolt is fastened to the apparatus body, so that the inner peripheral portion of the bolt insertion hole of the cover plate is securely engaged with the engagement portion of the first bolt. Can be combined.

In the steering lock device mounting structure having the basic feature according to the first aspect of the present invention, the engaging portion is an uneven portion that meshes with an uneven portion formed in an inner peripheral portion of the bolt insertion hole. it but it may also be formed, the bolt insertion may be formed as a tapered portion that engages with the inner periphery of the hole, or may be formed as a groove inner circumferential portion is fitted in the bolt insertion hole .

  According to a second aspect of the present invention, steering is performed between a part of a device body provided with a screw hole into which a bolt is screwed and a cover plate bolted to the device body by the bolt screwed into the screw hole. In the steering lock device mounting structure in which the column is sandwiched and fixed, an operation hole is provided in the device body that enables external contact with the screw portion of the bolt screwed into the screw hole. It is what.

  According to this configuration, after fixing one end portion of the cover plate to the apparatus body with a bolt, a jig or the like is inserted into the operation hole to crush and deform the thread of the screw portion of the bolt, thereby rotating the bolt. Thus, unauthorized removal of the bolt can be prevented, and the anti-theft performance can be improved. In addition, it is no longer necessary to provide a protective wall on the cover plate to prevent unauthorized access to the bolt head, making it easier to secure the space for installing the steering lock device and eliminating the need for a protective wall. Cost reduction and weight reduction can also be achieved.

  In the steering lock device mounting structure according to the second aspect of the present invention, in a state where the steering lock device is fixed to the steering column, the operation hole is located at a position where the opening of the operation hole is blocked by the steering column. It may be provided.

  According to this configuration, in the state where the steering lock device is fixed to the steering column, the opening of the operation hole is blocked by the steering column, so that the operation hole cannot be accessed from the outside, and the thread is restored. Operations such as returning to the state of can be prevented.

  In the steering lock device mounting structure according to the second aspect of the present invention, a thin wall may be provided between the screw hole and the operation hole.

  According to this configuration, when manufacturing the device body, the molds that form the screw holes and the operation holes can be combined easily and quickly without the need for fine adjustment to closely contact each other. The device body can be easily manufactured. Moreover, when the screw thread of a bolt is crushed and deformed with a jig or the like, the thin wall can be broken with a jig or the like, so that the work of deforming the screw thread can be performed without any problem.

  According to the mounting structure of the steering lock device of the present invention, once the cover plate is bolted and the steering lock device is once fixed to the steering column, the bolt is prevented from rotating thereafter. Can be prevented, and the anti-theft property can be improved. In addition, it is no longer necessary to provide a protective wall on the cover plate to prevent unauthorized access to the bolt head, making it easier to secure the space for installing the steering lock device and eliminating the need for a protective wall. Cost reduction and weight reduction can also be achieved.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a mounting structure of a steering lock device 10 according to a first embodiment of the present invention, and FIGS. 2A and 2B are sectional views of the mounting structure. In the mounting structure, the cylindrical steering column 1 is sandwiched between the curved end portion 14 of the device body 12 made of a metal casting of the steering lock device 10 and the curved portion 18 of the cover plate 16, whereby the steering lock The device 10 is fixed with respect to the steering column 1.

  The steering lock device 10 is provided with a key insertion hole 20 at the end opposite to the curved end 14. By inserting a regular key into the key insertion hole 20 and rotating the cylinder lock 21, a rod-shaped lock bolt 22 appears and disappears at the curved end 14 of the apparatus body 12. Further, the lock bolt 22 can be controlled so as to appear and disappear by wireless electronic authentication with an electronic key held by the user.

  In the steering column 1, there is disposed a steering shaft 2 made of a metal round bar whose end is connected to a steering wheel (not shown). A recess 3 is formed in the outer peripheral surface of the steering shaft 2 by cutting. When the lock bolt 22 protruding from the curved end portion 14 of the apparatus body 12 enters and engages with the recess 3 through the opening of the steering column 1, the rotation of the steering shaft 2 is prevented, and the steering wheel is It is supposed to be locked. On the other hand, when the lock bolt 22 escapes from the recess 3 and the engagement with the steering shaft 2 is released, the steering shaft 2 is allowed to rotate and the steering wheel is unlocked.

  Two screw holes 24 are formed in the device body 16 at both side positions sandwiching the curved end portion 14. A female screw is cut on the inner peripheral surface of each screw hole 24. The first bolt 26 and the second bolt 28 are screwed into these screw holes 24, respectively.

  As the first bolt 26 and the second bolt 28, threaded bolts are used. The first bolt 26 will be described as an example. The threaded bolt includes a threaded portion 26a having a male threaded outer peripheral surface, a disc-shaped bolt head portion 26b provided at an end of the threaded portion 26a, and a constriction. And a threaded portion 26d having a hexagonal shape integrally connected to the bolt head portion 26b via the portion 26c. By rotating the threaded portion 26d with a tool, the first bolt 26 is screwed into the screw hole 24. When a torque of a predetermined value or more is applied after the completion of the screwing, the threaded portion 26b is formed at the constricted portion 26c. The screw can be removed from the bolt head 26b. In addition, since the structure of the threaded bolt mentioned above is the same also about the 2nd bolt 28, the code | symbol attached to the same alphabet is attached | subjected to each part of the 2nd bolt 28, and description is abbreviate | omitted.

  The first bolt 26 differs from the second bolt 28 in that a step portion 26e is provided between the screw portion 26a and the bolt head portion 26b. The step portion 26e has a circular outer peripheral portion having a diameter larger than that of the screw portion 26a and smaller than that of the bolt head portion 26b, and is set to a dimension T slightly larger than the plate thickness of the cover plate 16 in the bolt axial direction. . In addition, an uneven portion (engagement portion) such as a gear tooth is formed on the entire outer periphery of the step portion 26e.

  For example, the cover plate 16 manufactured by pressing a metal plate has extended end portions 16a and 16b on both sides of the curved portion 18, and bolt insertion holes 30 and 32 are formed in the extended end portions 16a and 16b, respectively. Has been. The bolt insertion hole 30 is formed with a slightly larger diameter than the step portion 26 e of the first bolt 26, and the bolt insertion hole 32 is formed with a slightly larger diameter than the screw portion 28 a of the second bolt 28. On the inner peripheral portion of the bolt insertion hole 30, an uneven portion that can mesh with the uneven portion formed on the outer peripheral portion of the step portion 26 e of the first bolt 26 is formed. On the outer edge portions of the extended end portions 16 a and 16 b of the cover plate 16, defense walls 16 c are erected so as to surround the bolt head portions 26 b and 28 b of the bolts 26 and 28. The height of the protective wall 16c is preferably set to be slightly higher than the bolt heads 26b and 28b. In the present embodiment, as shown in FIG. 1, the concavo-convex portion is provided over the entire circumference of the inner peripheral portion of the bolt insertion hole 30, but the concavo-convex portion is provided only on the inner peripheral portion on the end side of the cover plate 16. May be provided.

Next, a procedure for attaching the steering lock device 10 to the steering column 1 will be described.
First, the operator attaches one end 16 a of the cover plate 16 to the device body 12 of the steering lock device 10 with the first bolt 26. At this time, the first bolt 26 is inserted into the screw hole 24 through the bolt insertion hole 30 of the cover plate 16, and the first bolt 26 is screwed and tightened until the step portion 26 e comes into contact with the surface of the apparatus body 12. When this tightening is completed, the distance between the bolt head 26b and the surface of the device body 12 corresponds to the axial dimension T of the step 26e of the first bolt 12. Since this interval T is slightly larger than the thickness of the cover plate 16, the edge of the bolt insertion hole 30 can move within the interval T.

  Then, the operator further removes the threaded portion 26d from the bolt head portion 26b by applying a large torque to the threaded portion 26d of the first bolt 26.

  Thereafter, the operator assembles the steering lock device 10 to which the one end portion 16 a of the cover plate 16 is attached around the steering column 1 at a position where the lock bolt 22 enters the recess 3 of the steering shaft 2. At this time, the other end portion 16b of the cover plate 16 is grasped and expanded so as to deform the cover plate 16, and from the side of the steering column 1, the curved end portion 14 of the device body 12 and the curved portion 18 of the cover plate 16 are formed. Insert the steering column 1 in between.

  Subsequently, as shown in FIG. 2A, the second bolt 28 is inserted into the bolt insertion hole 32 and screwed into the screw hole 24. At this time, the curved portion 18 of the cover plate 16 is pressed against the outer peripheral surface of the steering column 1 by being pushed by the bolt head portion 28b of the second bolt 28. In this process, as shown in FIG. 2 (b), a pulling force F in the direction of the arrow acts on the cover plate 16, thereby moving the cover plate 16 in the direction of the arrow.

  By moving the cover plate 16 in this way, the uneven portion of the inner peripheral portion of the bolt insertion hole 32 meshes with the uneven portion of the step portion 26 e of the first bolt 26. As shown in FIG. 2B, after the tightening of the second bolt 28 is completed, a larger torque is applied to the threaded portion 28d, whereby the threaded portion 28d is twisted off from the bolt head 28b and removed. It is. Thereby, the steering lock device 10 is fixed in a state where the steering column 1 is sandwiched between the device body 12 and the cover plate 16, and the mounting operation is completed. In the state where the steering lock device 10 is completely attached, the cover plate 16 does not move unless the second bolt 28 is loosened.

  As described above, in this embodiment, when the steering lock device 10 is attached to the steering column 1, the uneven portion of the step portion 26 e of the first bolt 26 is formed on the inner peripheral portion of the bolt insertion hole 30 of the cover plate 16. Engage with the uneven parts. This meshing prevents rotation of the first bolt 26, prevents unauthorized removal of the first bolt 26, and improves theft prevention. In addition, it is not necessary to provide the cover plate 16 with a large protective wall 16c for preventing unauthorized access to the bolt head portion 26b, and it is easy to secure an arrangement space for the steering lock device 10, and the protective wall 16 is small. As a result, the cost and weight of the cover plate 16 can be reduced.

  The procedure for attaching the steering lock device 10 to the steering column 1 is not limited to the procedure described above. For example, after attaching the one end portion 16a of the cover plate 16 to the device body 12 of the steering lock device 10 with the first bolt 26, the second bolt inserted into the bolt insertion hole 32 of the other end portion 16b of the cover plate 16 first. 2 is screwed into the screw hole 24 of the device body 12 several times as shown in FIG. 2A, and the other end portion 16b of the cover plate 16 is temporarily fixed. Then, after operating the key inserted into the key insertion hole 20 to immerse the lock bolt 22 into the apparatus body 12, the curved end 14 of the apparatus body 12 and the cover are opened from the opened end of the steering column 1. The ring portion constituted by the plate 16 is fitted, the steering lock device 10 is shifted to a predetermined position, and the second bolt 28 is finally tightened to attach the steering lock device 10 to the steering column 1. Good. In this way, since the second bolt 28 is temporarily fixed to the device body 12, the second bolt 28 does not fall off during the operation of attaching the steering lock device 10 to the steering column 1. Assembling can be easily performed.

  Here, in the present embodiment, as a means for preventing loosening due to unauthorized access to the first bolt 26, an uneven portion is provided on the outer peripheral portion of the step portion 26 of the first bolt 26, and this uneven portion is provided in the bolt insertion hole of the cover plate 16. Although it was made to mesh with the concavo-convex part provided in the inner peripheral part of 30, it is not limited to this, and various improvements are possible within the scope of the present invention.

  For example, as shown in FIG. 3A, the outer peripheral portion of the step portion 26e of the first bolt 26 is formed as a tapered portion that expands toward the screw portion 26a, and the inner peripheral portion of the bolt insertion hole 30 is uneven. It is not necessary to provide a part. In this case, as shown in FIG. 3B, when the cover plate 16 moves, the lower end portion of the tapered step portion 26 e of the first bolt 26 engages with the inner peripheral lower edge portion of the bolt insertion hole 30. Thereby, the movement of the first bolt 26 in the loosening direction (upward in the drawing) is restricted, and the rotation of the first bolt 26 can be prevented.

  Further, as shown in FIG. 4, a groove portion into which the inner peripheral portion of the bolt insertion hole 30 is fitted may be formed in the step portion 26 e of the first bolt 26. This also restricts the movement of the first bolt 26 in the loosening direction (upward in the drawing) and prevents the rotation of the first bolt 26.

  Further, even if the outer peripheral portion of the stepped portion 26e of the first bolt 26 and the inner peripheral portion of the bolt insertion hole 30 of the cover plate 16 that are engaged with each other are both formed as a simple plane, the frictional force is applied. The loosening prevention effect of the first bolt 26 can be expected.

  Next, the mounting structure of the steering lock device 10 according to the second embodiment of the present invention will be described with reference to FIGS. 5 to 8. The same components as those in the first embodiment are denoted by the same reference numerals. Detailed description thereof will be omitted.

  5 is a perspective view showing the mounting structure of the second embodiment, FIG. 6 is a front view seen from the direction of arrow A with the cover plate 16 removed in FIG. 5, and FIG. FIG.

  The attachment structure of the second embodiment is different from the first embodiment as follows. First, the uneven portion is not formed on the outer peripheral portion of the step portion 26 e of the first bolt 26, and similarly, the uneven portion is not formed on the inner peripheral portion of the bolt insertion hole 30 of the cover plate 16.

  Further, the device body 12 is formed with an operation hole 36 that enables external contact with the screw portion 26 a of the first bolt 26 screwed into the screw hole 24. As shown in FIG. 7, the operation hole 36 is formed adjacent to the screw hole 24 through a thin wall 38.

  The screw hole 24 and the operation hole 36 may be formed to communicate with each other. However, in that case, when the apparatus body 12 is manufactured, the molds that form the screw holes 24 and the operation holes 36 must be combined with high precision while finely adjusting the molds so that they closely contact each other. This increases the cost due to the time and man-hours required for manufacturing.

  On the other hand, as in the present embodiment, the screw hole 24 and the operation hole 36 are adjacent to each other with the thin wall 38 interposed therebetween without communicating with each other. The molds can be easily and quickly combined without requiring fine adjustment for bringing the molds forming the control holes 24 and the operation holes 36 into contact with each other, and the device body 12 can be easily manufactured.

Then, the work procedure in the attachment structure of 2nd Embodiment is demonstrated.
The procedure for attaching the steering lock device 10 to the steering column 1 is substantially the same as in the first embodiment. A different point is that in the state shown in FIG. 8A in which one end portion 16a of the cover plate 16 is attached to the apparatus body 12 and the threaded portion 26d of the first bolt 26 is removed, the cover body 16 is inserted into the operation hole 36 of the apparatus body 12. It is only necessary to destroy the thin wall 38 by smashing with a jig or the like and crush the thread of the threaded portion 26a of the first bolt 26.

  In this way, after fixing the one end portion 16a of the cover plate 16 to the apparatus body 12 with the first bolt 26, a jig or the like is inserted into the operation hole 26 to crush and deform the thread of the screw portion 26a of the first bolt 26. By doing so, it is possible to prevent the rotation of the first bolt 26, thereby preventing unauthorized removal of the first bolt 26 and improving theft prevention. Moreover, it is not necessary to provide the cover plate 16 with a large protective wall 16c for preventing unauthorized access to the bolt head 26b, and it is easy to secure the space for arranging the steering lock device 10, and the protective wall 16c is small. As a result, the cost and weight of the cover plate 16 can be reduced.

  Further, in the mounting structure of the present embodiment, as shown in FIG. 8B, the opening of the operation hole 36 is blocked by the steering column 1 in a state where the steering lock device 10 is fixed to the steering column 1. It is preferable that an operation hole 36 is provided in the above. By doing in this way, access to the operation hole 36 from the outside becomes impossible, and operations such as returning the screw thread of the first bolt 26 that has been crushed and deformed to its original state can be prevented.

In each of the above embodiments, threaded bolts are used for the first bolts 26 and the second bolts 28. However, it is not excluded that bolts that are not threaded bolts are used.
Moreover, it is also possible to adopt as an option that the cover plate 16 is not provided with a protective wall at all.

The perspective view which shows the attachment structure of the steering lock apparatus of 1st Embodiment. Sectional drawing of the attachment structure of FIG. The figure which shows the modification of the engaging part provided in the 1st volt | bolt. The figure which shows another modification of the engaging part provided in the 1st volt | bolt. The perspective view which shows the attachment structure of the steering lock apparatus of 2nd Embodiment. The front view without the cover board of the apparatus body of FIG. BB sectional drawing of only the apparatus body in FIG. Sectional drawing of the attachment structure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Steering column 2 ... Steering shaft 3 ... Recess 10 ... Steering lock device 12 ... Device body 14 ... Curve end (part)
16 ... cover plate 18 ... curved portion 24 ... screw hole 26 ... first bolt 26a ... screw portion 26b ... bolt head portion 26c ... constricted portion 26d ... threaded portion 26e ... step portion 28 ... second bolts 30, 32 ... bolt insertion Hole 36 ... Operation hole 38 ... Thin wall

Claims (4)

A steering column is sandwiched and fixed between a part of the apparatus body and a cover plate bolted to the apparatus body by first and second bolts respectively inserted into bolt insertion holes provided on both sides. In the mounting structure of the steering lock device,
An engagement portion is provided on the outer peripheral portion of the first bolt, and when the other end of the cover plate is tightened with the second bolt after the one end of the cover plate is attached to the device body with the first bolt. The engaging portion of the first bolt is configured to engage with the inner peripheral portion of the bolt insertion hole of the cover plate by the movement of the cover plate that occurs,
The engaging portion is provided on an outer peripheral portion of a step portion provided between a bolt head portion and a screw portion of the first bolt, and the step portion is attached to the device body in a state where the first bolt is tightened. contact, the cover plate of the bolt head and the device characteristics and to Luz tearing locking device that sets the interval so as to be movable in a gap between the surface of the body at the time of tightening of the second bolt Mounting structure. A steering column is sandwiched and fixed between a part of the apparatus body and a cover plate bolted to the apparatus body by first and second bolts respectively inserted into bolt insertion holes provided on both sides. In the mounting structure of the steering lock device,
An engagement portion is provided on the outer peripheral portion of the first bolt, and when the other end of the cover plate is tightened with the second bolt after the one end of the cover plate is attached to the device body with the first bolt. The engaging portion of the first bolt is configured to engage with the inner peripheral portion of the bolt insertion hole of the cover plate by the movement of the cover plate that occurs,
Mounting structure of the engaging portion, the bolt insertion hole that is formed as a concavo-convex portion that meshes with the concave-convex portion formed on the inner peripheral portion, wherein the to Luz Tearing locking device for. A steering column is sandwiched and fixed between a part of the apparatus body and a cover plate bolted to the apparatus body by first and second bolts respectively inserted into bolt insertion holes provided on both sides. In the mounting structure of the steering lock device,
An engagement portion is provided on the outer peripheral portion of the first bolt, and when the other end of the cover plate is tightened with the second bolt after the one end of the cover plate is attached to the device body with the first bolt. The engaging portion of the first bolt is configured to engage with the inner peripheral portion of the bolt insertion hole of the cover plate by the movement of the cover plate that occurs,
Mounting structure of the engaging portion, the bolt insertion hole that is formed as a tapered portion engaged with the inner peripheral edge features and be away Tearing locking device for. A steering column is sandwiched and fixed between a part of the apparatus body and a cover plate bolted to the apparatus body by first and second bolts respectively inserted into bolt insertion holes provided on both sides. In the mounting structure of the steering lock device,
An engagement portion is provided on the outer peripheral portion of the first bolt, and when the other end of the cover plate is tightened with the second bolt after the one end of the cover plate is attached to the device body with the first bolt. The engaging portion of the first bolt is configured to engage with the inner peripheral portion of the bolt insertion hole of the cover plate by the movement of the cover plate that occurs,
Mounting structure of the engaging portion, the bolt insertion hole inner peripheral portion fitted Komu groove features and be away Tearing locking device being formed as a.

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