JP2001207705A - Steering lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering lock device in which illegal removal of a cylinder lock from a body by using a tool is prevented. SOLUTION: In this steering lock device in which a cylinder lock 4 composed of members including a cylinder inner 1 and a cylinder outer 3, and a lock shaft 7 to prohibit rotation of a steering shaft at a lock position in accordance with rotation of the cylinder inner 1 are contained in a body 9, and in which a lock pin 10 provided on the cylinder outer 3 and energized to be protruded in an outer circumferential direction is engaged with an engagement part 12 in the body 9 to hold the cylinder lock 4 in the body 9, a metal reinforcement plate 18 having a pin hole 18e of a smaller diameter than the engagement part 12 of the body 9 is provided, and the reinforcement plate 18 is installed on the body 9 at a position where the pin hole 18e covers the engagement part 12 in the body 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock fixing structure for preventing theft in a steering lock device.

[0002]

2. Description of the Related Art A steering lock device includes a cylinder lock including a cylinder inner and a cylinder outer, and a lock shaft for preventing rotation of a steering shaft at a lock position according to rotation of the cylinder inner in a body. It is stored. Some cylinder locks housed in the body are fixed by caulking or the like, but in order to enable replacement and improve serviceability, a lock pin urged to protrude in the outer peripheral direction is provided on the cylinder outer It is also known that the lock pin is engaged with the engagement hole of the body and the lock pin can be pushed in at a predetermined rotation position of the cylinder inner so that the cylinder lock can be removed.

[0003] Further, a body, a cylinder lock and the like are generally formed by zinc die casting or the like.

However, in such a case, in order to remove the cylinder lock from the body for the purpose of fraud, for example, the pin is forcibly pushed in by hitting the lock pin with a punch, or the lock pin is removed by drilling a hole. As a result, there was a possibility that the cylinder lock was pulled out of the body.

[0005]

SUMMARY OF THE INVENTION In view of this point, the present invention has been made to prevent a cylinder lock from being illegally removed from a body using a tool or the like.

[0006]

In order to achieve the above-mentioned object, a steering lock device according to the present invention provides a cylinder lock composed of a member including a cylinder inner and a cylinder outer, and a cylinder lock according to rotation of the cylinder inner. A lock shaft that prevents rotation of the steering shaft at the lock position is housed in the body, and a lock pin provided on the cylinder outer and urged to protrude in the outer peripheral direction is engaged with the engagement portion of the body. Thus, the cylinder lock is held in the body, and a metal reinforcing plate having a pin hole smaller in diameter than the engaging portion of the body is provided, and at a position where the pin hole covers the engaging portion of the body. The reinforcing plate is attached to the body.

It is preferable that the reinforcing plate is fixed to the body with a one-way screw that can rotate only in a tightening direction.

Further, it is preferable that the reinforcing plate is formed with a hardness that cannot be drilled.

Further, it is preferable that a pin hole formed in the reinforcing plate is smaller than a diameter of the lock pin.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An object of the present invention is to prevent a cylinder lock from being illegally removed from a body using a tool.
It was realized with the minimum number of parts required to attach a metal reinforcing plate.

[0011]

1 is a plan view of a steering lock device according to the present invention, FIG. 2 is a partially cutaway schematic front view, and FIG.
It is a partial sectional view of a line. In FIG. 2, the key is inserted from the right front of the figure. 1 is a cylinder inner, 2 is a lock seal, and 3 is a cylinder outer. A well-known cylinder is formed by sequentially inserting the lock seal 2 and the cylinder inner 1 into the cylinder outer 3 from the left side of the figure and holding them rotatably. The lock 4 is constituted. Reference numeral 5 denotes a cam connected to the cylinder inner 1. When a key is inserted into the cylinder inner 1 and rotated, the cam 5 rotates together, and the rotor 6a of the switch unit 6 provided coaxially rotates. A predetermined switch operation is performed.

The cylinder inner 1, the cylinder outer 3, and the cam 5 are formed by zinc die casting.

Reference numeral 7 denotes a lock shaft for preventing rotation of the steering shaft, reference numeral 7a denotes an operation portion thereof, and reference numeral 8 denotes a lock shaft biasing spring. When a key is removed at the lock position, the lock shaft 7 is pressed by the spring 8. And protrudes upward to lock a steering shaft (not shown). 9 is a body for accommodating the above members, 10 is a lock pin attached to a projection 3a formed on the upper rear end of the cylinder outer 3, and 11 is a rattle between the cylinder outer 3 and the body 9 Rubber member.

The lock pin 10 is connected to the cylinder inner 1
Is inserted into the cylinder outer 3 together with the spring 10a in a recess 3b formed in the projection 3a of the cylinder outer 3, and the holding plate 10b is fixed to the cylinder outer 3 by means such as caulking. The spring receiver 10c projects to a position where the spring receiver 10c hits the holding plate 10b by the urging force in the outer peripheral direction by the spring 10a,
The outer end 10d is engaged with an engagement hole 12 which is an engagement portion formed in the body 9.

In this example, a flange 15 having a large outer diameter and a step 16 having a smaller diameter are formed on the back side of the cylinder inner 1. The lock pin 10 is provided at a position corresponding to the step 16, and its length is such that the inner end 10 e penetrates the recess 3 b while the outer end 10 d is engaged with the engagement hole 12. , Are selected so as to substantially contact the outer peripheral portion of the step portion 16. Therefore, when the cylinder inner 1 is inserted into the cylinder outer 3 and the lock pin 10 is attached, the cylinder inner 1 is prevented from coming off by the flange-shaped portion 15 hitting the lock pin 10, and a temporary cylinder assembly centering on the cylinder lock 4. The assembled state is maintained.

The cylinder inner 1 is rotatable from a lock position (LOCK) shown in FIG. 3 through an ACC position and an ON position to a start position (START), and FIG. 5 shows a state in which the cylinder inner is in the lock position. In addition, a concave portion 17 is formed on the outer peripheral portion of the step portion 16 at a position matching the lock pin 10 when the cylinder inner 1 is at the ACC position.
The size of the concave portion 17 is selected so that the inner end portion 10e of the lock pin 10 can be inserted, and the lock pin 10 can be pushed only at the ACC position until the outer end portion 10d comes out of the engagement hole 12.

Therefore, by rotating the cylinder inner 1 incorporated in the cylinder outer 3 to this ACC position, the lock pin 10 can be pushed in as shown in FIG. Can be inserted. After insertion, the outer end 10d of the lock pin 10
2, the cylinder outer 3 is fixed to the body 9,
The cylinder inner 1 also cannot move to the back side. The operation of removing the cylinder outer 3 from the body 9 can also be performed by adjusting the cylinder inner 1 to the ACC position and pushing in the lock pin 10. Note that the position where the lock pin 10 can be pushed is not limited to the ACC position, and another appropriate rotation position can be selected.

Further, as shown in FIGS. 1 and 4, a metal reinforcing plate 18 is fastened and fixed to the body 9 with a one-way screw 19 at a position covering the engagement hole 12 of the body 9.

The reinforcing plate 18 is made of a metal material that cannot be drilled or the like, for example, a material hardened on an iron plate.
As shown in (a) and (b), a pair of mounting portions 18b, 18b formed by bending both sides from the base portion 18a and a cover portion 18c extending on one side are formed. And
Mounting holes 18d, 18d through which the one-way screw 19 is inserted are formed in the mounting portions 18b, 18b.
Is formed with a pin hole 18e having a diameter smaller than that of the engagement hole 12 of the body 9 and the lock pin 10 and having a diameter of about 1.5 mm. The pin hole 18e is located substantially at the center of the upper part of the lock pin 10. Therefore, even if a drill smaller than the pin hole 18e is used, the lock pin 10 cannot be broken.

The one-way screw 19 is shown in FIG.
As shown in (b), it is formed of a flange portion 19a and a screw portion 19b, and a plus driver is fitted into the flange portion 19a,
When the screwdriver is rotated clockwise (screw tightening direction), it engages with the screwdriver to enable screw tightening, and when rotated counterclockwise, the cross-shaped groove 19c is provided so that the screwdriver idles. Is formed.

After the metal reinforcing plate 18 is tightened and fixed, the upper part of the lock pin 10 is driven with a punch in order to remove the cylinder lock 4 from the body 9 by an illegal method (without using a key). Any attempt to drill a hole is prevented by the reinforcing plate 18. Further, with a metal bar that is thin enough to pass through the pin hole 18e, the metal bar breaks first and the lock pin 10 cannot be pushed. That is, when the key is inserted into the cylinder inner 1, the cylinder inner 1 is rotated to the ACC position, and the lock pin 10 can be pushed only when the lock pin 10 is pushed with a thin metal rod, and the cylinder lock 4 is moved to the body 9 It can be removed from.

Since the reinforcing plate 18 is simply attached by screwing, if the reinforcing plate is removed, the same as the conventional example is obtained. Therefore, it is possible to selectively use a product that does not require high theft and a product that requires high theft, and can use common components.

The lock seal 2 provided at the key insertion opening is for theft prevention to prevent the cylinder inner 1 from rotating even if a tool such as a screwdriver is beaten through the key insertion opening. The method generally has a relatively small holding force for preventing the cylinder inner 1 from moving to the rear side, and has a disadvantage that the cylinder inner 1 is displaced in the rear direction even if the lock seal 2 is provided, and the anti-theft effect is reduced. . However, in this example, a step 9a is provided in a part of the body 9 as shown in FIG.
And the movement of the cylinder inner 1 to the rear side is also prevented by this, so that the cylinder inner 1 is reliably prevented from coming off in the rear direction.

[0024]

As is apparent from the above description, the steering lock device of the present invention is provided with a metal reinforcing plate having a pin hole smaller in diameter than the body engaging portion, and the pin hole is formed in the body. The reinforcing plate is attached to the body at a position covering the engagement portion.

Therefore, in an unauthorized manner (without using a key)
Even if the upper part of the lock pin is driven by a punch or the like to remove the cylinder lock from the body, the destruction of the body is prevented by the reinforcing plate, and the cylinder lock is not removed.

If the reinforcing plate is fixed to the body with a one-way screw that can rotate only in the tightening direction, the reinforcing plate is not removed, and the reinforcing plate is simply attached by screwing. Therefore, if this reinforcing plate is not attached, the product becomes the same as the conventional example, and it is possible to share parts of a product that does not need high theft and a product that needs high theft.

If the reinforcing plate is formed with a hardness that cannot be drilled, it cannot be broken by drilling. If the pin hole formed in the reinforcing plate is smaller than the diameter of the lock pin,
The lock pin cannot be broken, and the high theft property can be further improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a steering lock device according to the present invention.

FIG. 2 is a partial cross-sectional front view of the steering lock device of the present invention (a partial cross-sectional view taken along line AA in FIG. 1).

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a plan view of the steering lock device of the present invention. It is BB sectional drawing of FIG.

FIG. 5 is a plan view of the steering lock device of the present invention. It is CC sectional drawing of FIG.

FIG. 6 is a diagram showing a state in which a lock pin is pushed in when the cylinder inner is in the ACC position.

FIGS. 7A and 7B are enlarged views of the reinforcing plate of the present invention, wherein FIG. 7A is a front view of the reinforcing plate, and FIG.

FIG. 8 is an enlarged view of the one-way screw of the present invention, wherein (a) is a front view of the one-way screw and (b) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder inner 3 Cylinder outer 4 Cylinder lock 7 Steering shaft 9 Body 10 Lock pin 12 Engagement hole (engagement part) 18 Reinforcement plate

Claims (4)

[Claims] A cylinder lock comprising a member including a cylinder inner and a cylinder outer, and a lock shaft for preventing rotation of a steering shaft at a lock position according to rotation of the cylinder inner are housed in a body. A steering lock device configured to hold a cylinder lock in a body by engaging a lock pin provided on a cylinder outer and urged to protrude in an outer peripheral direction with an engagement portion of the body, A metal reinforcing plate having a pin hole smaller in diameter than the engaging portion is provided, and the reinforcing plate is attached to the body at a position where the pin hole covers the engaging portion of the body. Steering lock device. 2. The steering lock device according to claim 1, wherein the reinforcing plate is fixed to the body with a one-way screw rotatable only in a tightening direction. 3. The steering lock device according to claim 1, wherein the reinforcing plate is formed with a hardness that cannot be drilled. 4. The steering lock device according to claim 1, wherein a pin hole formed in the reinforcing plate is smaller than a diameter of the lock pin.