JP5077681B2 - Vehicle steering lock device - Google Patents

Description

  The present invention relates to a vehicle steering lock device, and more particularly to a vehicle steering lock device that can prevent unauthorized removal of a fixing bolt.

  A steering lock device for a vehicle regulates rotation of a steering shaft in order to prevent theft of the vehicle. An example of a conventional vehicle steering lock device is disclosed in Patent Document 1 below. Patent Document 1 describes a technique for preventing the engine from starting while the steering is locked.

  The steering lock device is covered with a robust casing in order to protect the device itself from destruction. Further, the steering lock device is attached to the steering column with a special fixing bolt that cannot be loosened by a general tool so that the device itself cannot be removed illegally. Further, it is possible to take measures such as applying an adhesive to the threaded portion of the fixing bolt or arranging the fixing bolt at a position where it is difficult to access.

  In Patent Document 2 below, after the steering lock device is mounted, not only the head of the fixing bolt is broken, but also the anti-theft function is improved by forming a peripheral wall that covers the periphery of the mounting seat after the folding. A steering lock device is disclosed.

JP 2003-293923 A Japanese Utility Model Publication No. 5-460

  Incidentally, the steering lock device may need to be removed from the steering column even if it is not intended for theft. For example, when a malfunction occurs in the steering lock device, it may be necessary to remove the steering lock device for maintenance services such as vehicle inspection and repair. In addition, it may be necessary to rearrange the steering lock device on the vehicle production line.

  However, even in such a case, it is difficult to easily remove the fixing bolt of the steering lock device. For this reason, there was a problem that it took time to remove the steering lock device.

  Accordingly, an object of the present invention is to provide a steering lock device that is excellent in crime prevention and maintainability.

  In order to achieve the above object, a steering lock device for a vehicle according to the present invention is a steering lock device for a vehicle that is attached to a steering column that houses a steering shaft of the vehicle, and fixes the steering lock device to the steering column. A fixing bolt, and a lock member that can be engaged with and disengaged from the steering shaft. The locking member is also engaged with the fixing bolt when engaged with the steering shaft, and the fixing bolt when not engaged with the steering shaft. Both are disengaged.

  Thus, according to the steering lock device for a vehicle of the present invention, when the lock member is engaged with the steering shaft and the steering shaft is regulated, the lock member also engages with the fixing bolt. Unauthorized removal is prevented. Moreover, it is not necessary to use a special bolt that breaks the head or to apply an adhesive to the threaded portion of the fixing bolt in order to prevent unauthorized removal of the fixing bolt. As a result, it is possible to use a fixing bolt that can be turned with a general tool.

  Further, when the lock member is disengaged from the steering shaft, the lock member is also disengaged from the fixing bolt, so that the fixing bolt can be easily removed. Therefore, according to the present invention, it is possible to provide a steering lock device that is excellent in crime prevention and maintainability.

In the present invention, it is preferable that the fixing bolt has an engaging groove that engages with the branch portion at least at a part of an outer periphery thereof, and the lock member branches from the main shaft portion and the main shaft portion. And a lock pin that moves in the axial direction of the main shaft portion and engages and disengages with the steering shaft, and the lock pin has a front end engaged with the steering shaft, The branch portion engages with the engagement groove of the fixing bolt.
Thus, the present invention can achieve both security and maintainability with a simple configuration by devising the shapes of the fixing bolt and the lock pin.

In the present invention, it is preferable that the fixing bolt is disposed so that an axis of the fixing bolt is orthogonal to an axis of the lock pin, and the engagement groove is a surface orthogonal to the axial direction of the fixing bolt. And the branch portion of the lock pin has a protrusion extending in the distal direction of the main shaft portion in parallel with the axis of the main shaft portion, and the protrusion is the engagement groove of the fixing bolt. Engage with.
Thus, the present invention can achieve both crime prevention and maintainability with a simple configuration by devising the shapes of the fixing bolt and the lock pin.

In the present invention, it is preferable that the lock pin is moved in the axial direction of the main shaft portion by an electric motor.
Thus, the present invention is suitable for application to an electric steering lock device.

In the present invention, it is preferable that the lock pin is moved in the axial direction of the main shaft portion by operation of an ignition key inserted in the ignition.
Thus, the present invention is suitable for application to a mechanical steering lock device.

Embodiments of a steering lock device for a vehicle according to the present invention will be described below with reference to the accompanying drawings.
First, the configuration of the electric steering lock device of the first embodiment will be described with reference to FIG. FIG. 1A shows a state where the steering shaft is locked, and FIG. 1B shows a state where the steering shaft is not locked.

As shown in FIGS. 1A and 1B, the steering lock device 1 for a vehicle according to this embodiment is attached to a steering column 3 that houses a steering shaft 2 of the vehicle. The steering lock device 1 includes a fixing bolt 11 that fixes the steering lock device 1 to the steering column 3 and a lock pin 12 that can be engaged with and disengaged from the steering shaft 2.
In addition, in FIG. 1, illustration of the support structure of the lock pin 12 is abbreviate | omitted.

  In the present embodiment, the steering lock device 1 is attached to the steering column 3 via the bracket 4. One end 41 of the bracket 4 is fixed to the steering lock device 1, the steering column 3 is wound around, and the vicinity of the other end 42 is fixed to the steering lock device 1 by the fixing bolt 11.

  The fixing bolt 11 has an engaging groove 111 in a plane perpendicular to the axial direction of the fixing bolt on the outer periphery of the shaft portion. Since the engaging groove 111 is formed on the entire circumference of the fixing bolt 11, the fixing bolt 11 is bundled with the engaging groove 111. Further, the head of the fixing bolt 11 may be a cross screw or a hexagon screw so that the fixing bolt 11 can be turned with a general tool such as a screwdriver or a wrench.

  The lock member 12 includes a lock pin 12 having a main shaft portion 121 and a branch portion 122 branched from the main shaft portion 121. As shown by arrows a and b in FIGS. 1A and 1B, the lock pin 12 moves in the axial direction of the main shaft 121 and engages and disengages with the steering shaft 2. The movement of the lock pin 12 is performed by rotation of the rotating shaft of the electric motor 13 via the worm gear 14 and the gear 15.

  As shown in FIG. 1A, the lock pin 12 moves in the direction of the arrow a, and the tip 121 a of the main shaft portion 121 engages with the engagement groove 21 of the steering shaft 2. A plurality of engaging grooves of the steering shaft 2 are formed on the outer periphery of the steering shaft 2 along the axial direction of the steering shaft 2. When the tip 121a of the main shaft portion 121 of the lock pin 12 is engaged with the engagement groove 21 of the steering shaft 2, the rotation of the steering shaft 2 is restricted.

  The branch portion 122 of the lock pin 12 has a protrusion 122 a extending in the direction of the tip 121 a of the main shaft portion 121 in parallel with the axis of the main shaft portion 121. As shown in FIG. 1A, the protrusion 122 a of the lock pin 12 is engaged with the fixing bolt 11 when the tip 121 a of the main shaft 121 of the lock pin 12 is engaged with the steering shaft 2. Engages with the groove 111.

  The fixing bolt 11 is arranged so that the axis of the fixing bolt 11 is orthogonal to the axis 121 of the main shaft portion 121 of the lock pin 12, and the engaging groove 111 is formed in a plane orthogonal to the axial direction of the fixing bolt 12. Therefore, when the engagement groove 111 of the fixing bolt 11 and the protrusion 122a of the lock pin 12 are engaged, the movement of the fixing bolt 11 in the axial direction is restricted.

  Thus, in the steering lock device of the present embodiment, when the lock pin 12 is engaged with the steering shaft 2, the lock pin 12 is also engaged with the fixing bolt 11. For this reason, when the steering is locked, the fixing bolt 11 is also locked. As a result, it is possible to prevent the fixing bolt 11 from being removed illegally while the steering is locked.

  In this way, by engaging the lock pin 12 with the fixing bolt 11 at the time of steering lock, it is possible to prevent unauthorized removal of the fixing bolt 11, so that the head of the fixing bolt can be broken or the threaded portion of the fixing bolt can be removed. There is no need to apply adhesive. For this reason, it becomes possible to use the fixing bolt which can be attached or detached with a general tool.

  Further, when the lock pin 12 moves in the direction of the arrow b in FIG. 1B, the lock pin 12 is disengaged from the steering shaft 2 and is also not engaged with the fixing bolt 11. That is, when the steering lock is released, the lock of the fixing bolt 11 is also released. Thereby, it becomes possible to remove the fixing bolt 11 easily.

  As described above, according to the steering lock device of the present embodiment, crime prevention and maintainability can be achieved by simply changing the shape of the fixing bolt and the shape of the lock pin without increasing the number of parts compared to the conventional product. Can be made compatible. In addition, since the number of components is not increased in this way, it is possible to avoid an increase in manufacturing cost.

  Next, a mechanical steering lock device according to a second embodiment will be described with reference to FIG. FIG. 2 shows a state in which the lock pin 12 is engaged with the steering shaft 2 and also with the fixing bolt 11. The mechanical steering lock device of the present embodiment has the same structure of the fixing bolt 11 and the structure of the lock pin 12 as those of the first embodiment except for the mechanism for moving the lock pin 12 in the axial direction. .

  In this embodiment, the lock pin 12 moves along the direction of the arrow c by the cooperation of the connecting rod 18 and the spring 19 due to the insertion and rotation of the ignition key 16 into the ignition cylinder 17. The mechanism for moving the lock pin 12 is the same as that of a conventional mechanical steering lock device.

  In each embodiment mentioned above, although the example which constituted the present invention on specific conditions was explained, the present invention can perform various change and combination, and is not limited to this. For example, in the above-described embodiment, the example in which the axis of the fixing bolt and the axis of the lock pin are arranged to be orthogonal to each other has been described, but the arrangement relationship between the fixing bolt and the lock pin is not limited thereto. For example, the axis of the fixing bolt and the axis of the lock pin may be arranged in a twisted relationship.

  In the above-described embodiment, the example in which the lock pin is engaged with the fixing bolt so that the movement of the fixing bolt in the axial direction is restricted has been described. However, in the present invention, the engagement between the fixing bolt and the lock pin is described. The way is not limited to this. For example, the lock pin may be engaged with the fixing bolt so as to restrict the rotation of the fixing bolt. Specifically, a notch may be formed in the fixing bolt, and a lock pin may be engaged with the notch. Moreover, the shape of the engaging part of a fixing bolt can employ | adopt arbitrary suitable things.

  Moreover, although the above-mentioned embodiment demonstrated the example which used the lock member as the lock pin, the shape of a lock member is not limited to this, Arbitrary suitable shapes can be employ | adopted.

(A) shows the steering lock device at the time of steering lock of the first embodiment of the present invention, and (b) shows the steering lock device at the time of steering unlock. The steering lock device of a 2nd embodiment of the present invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steering lock device 2 Steering shaft 3 Steering column 4 Bracket 11 Fixing bolt 12 Lock pin 13 Electric motor 14 Worm gear 15 Gear 16 Ignition key 17 Ignition cylinder 18 Connecting rod 19 Spring 21 Engaging groove 111 Engaging groove 121 Main shaft part 121a Tip 122 Branch 122a Projection

Claims (5)

A steering lock device for a vehicle that is attached to a steering column that houses a steering shaft of the vehicle,
A fixing bolt for fixing the steering lock device to the steering column;
A lock member capable of being engaged and disengaged with the steering shaft,
The lock member engages with the fixing bolt when engaged with the steering shaft, and disengages with the fixing bolt when not engaged with the steering shaft.
A steering lock device for a vehicle. The fixing bolt has an engaging groove on at least a part of its outer periphery,
The lock member has a main shaft portion and a branch portion branched from the main shaft portion, and includes a lock pin that moves in an axial direction of the main shaft portion and engages / disengages with the steering shaft,
In the lock pin, a tip end of the main shaft portion is engaged with the steering shaft, and the branch portion is engaged with an engagement groove of the fixing bolt.
The vehicle steering lock device according to claim 1. The fixing bolt is disposed so that an axis of the fixing bolt is orthogonal to the axis of the lock pin, and the engagement groove is formed in a plane orthogonal to the axial direction of the fixing bolt,
The branch portion of the lock pin has a protrusion extending in the distal direction of the main shaft portion in parallel with the axis of the main shaft portion,
The protrusion engages with the engagement groove of the fixing bolt;
The steering lock device for a vehicle according to claim 2. The lock pin is moved in the axial direction of the main shaft portion by an electric motor.
The steering lock device for a vehicle according to claim 2 or 3, The lock pin moves in the axial direction of the main shaft portion by operation of an ignition key inserted in the ignition cylinder.
The steering lock device for a vehicle according to claim 2 or 3,

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