JP2535157B2 - Steering lock device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering lock device, and more particularly to a steering lock device equipped with a mechanical fuel cut mechanism.

<Prior art and its problems> A steering lock device for a vehicle equipped with a diesel engine has an electric or mechanical fuel cut mechanism in order to stop the engine by the same operation as a gasoline engine vehicle. There is one that is equipped with, and the fuel is automatically cut in conjunction with the operation of returning the key to the lock position.

Among these, there is, for example, Japanese Patent Publication No. 50-39303 as a machine equipped with a mechanical fuel cut mechanism, which is provided with a fuel passage opening / closing operation lever linked to a lock control member rotated by a rotor of a cylinder lock, The lever is swung according to the rotational position of the lock control member.

However, in the structure of the above publication, an engaging pin is provided on a projecting plate provided coaxially with the lock control member, and the engaging pin is engaged with an inner edge of a cam hole formed in the lever so as to swing the lever. The combination of the shape of the cam hole and the engagement pin is delicate, and high precision machining is required to obtain stable operation, and if the cam hole or engagement pin wears out, malfunction may occur easily. In addition, there are problems that the number of parts is large, the structure is complicated, and the cost is high.

The present invention has been made in view of these problems, and an object thereof is to provide a steer rig lock device having a simple structure, easy to manufacture, and stable operation.

<Means for Solving the Problems> In order to achieve the above-mentioned object, in the present invention, a first cam surface formed in a diameter direction on the outer circumference of a cam member rotated by a rotor of a cylinder lock, A second cam surface and a third cam surface, which are continuously formed in the circumferential direction, are provided on the outer diameter side and the inner diameter side of the first cam surface, respectively. Further, an arcuate link member is provided, which is connected to the fuel cut control mechanism at its outer end and is biased toward the inner end, and is supported by the body so as to be retractable in the longitudinal direction in an arrangement surrounding the body of the steering lock device. This link member is in contact with the third cam surface when the inner end of the link member is between the on position and the start position, and when the cam member returns from the on position to the lock position, the link member rotates. The inner end is pushed by the first cam surface to move in a direction substantially perpendicular to the first cam surface, and then rides on the second cam surface to stop the movement.

<Operation> Since the steering lock device of the present invention is configured as described above, when the cam member is returned from the ON position to the lock position and rotated, the inner end of the link member is brought to the first cam surface of the cam member. When the link member is pushed, the link member moves in the longitudinal direction of the link member so that the outer end of the link member projects from the body. On the contrary, when the cam member is rotated from the lock position to the on position, the inner end loosens on the second cam surface and then comes into contact with the first cam surface and moves while following the first cam surface, and the outer end moves. Be drawn into the body. The fuel cut control mechanism connected to the outer end of the link member is controlled by the movement of the link member.

<Example> The following example will be described.

1 (a) and 1 (b) are front views of essential parts, and FIGS. 2 and 3 are views showing the overall appearance. In the drawings, 1 is a cylinder lock, a rotary switch, a steering lock mechanism. In a steering lock device incorporating the above, a key insertion portion 2 for a built-in cylinder lock is provided on the front surface, a mounting portion 3 for a steering column is provided on the side surface, and a rotary switch 4 is provided on the rear portion. It has been incorporated. The steer rig lock mechanism described above includes a cam member connected to the cylinder inner of the cylinder lock, and a lock shaft 5 and the like for fixing the steer rig shaft by protruding into the mounting portion 3 at the lock position according to the rotation of the cam member. Since it is provided, and the mechanism is basically the same as a well-known one, a detailed structural description will be omitted.

In FIG. 1, 1a is a body of the steering lock device 1, 11 is a connecting portion at the rear end of the cylinder inner of the cylinder lock,
Reference numeral 12 denotes a cam member connected to the connecting portion 11,
Reference numeral 12 is rotated in response to the operation of a key (not shown) inserted in the cylinder inner of the cylinder lock to perform the above-mentioned operation of retracting the lock shaft 5 and rotating the rotor in the rotary switch 4 to a predetermined position. Open and close it. The cam member 12 is provided with a fan-shaped protrusion 12a, and the outer edge of the protrusion 12a is formed with a diametrical first cam surface 13 and in a circumferential direction continuously from the first cam surface 13. The second cam surface 14 has a large diameter, and the portion other than the protrusion 12a is a third cam surface 15 having a small diameter and formed continuously in the circumferential direction of the cam surface 13.

Reference numeral 21 denotes an arc-shaped link member, which has an intermediate portion and an inner end portion.
A roller 22 is attached to 21a and is supported by an arc guide 1b provided on the body 1a so as to be movable along an arc center line A. The outer end of this link member 21
21b is appropriately connected to a fuel cut control mechanism (not shown) via a connecting means such as a wire, and the outer end 21b is connected to the body 1a.
The fuel is cut when it moves in the direction projecting from, and the fuel is supplied when it moves in the opposite direction. Further, the link member 21 is arranged such that the inner end portion 21a abuts the first cam surface 13 at a substantially right angle at the ON position shown in FIG. Is biased toward the inner end 21a by a spring (not shown). This spring is provided, for example, in the fuel cut control mechanism, and the link member 21 is given a biasing force through the connecting means.

This embodiment is configured as described above, and operates as follows.

That is, when the cam member 12 is returned and rotated counterclockwise from the position shown in FIG.
The link member 21 is moved along the arc-shaped center line A by being pushed by and then the roller 22 of the inner end portion 21a rides on the cam surface 14. At this time, the roller 22 is in contact with only the cam surface 14. Then, the roller 22 rolls on the cam surface 14 until the lock position shown in FIG. 1 (b) is reached, and the outer end portion 21b of the link member 21 projects by a certain amount, that is, the stroke indicated by B, It becomes a cut state and that state is maintained.

Further, when the cam member 12 is rotated clockwise from the lock position, the roller 22 of the inner end portion 21a rolls on the cam surface 14 by the operation opposite to the above, and then contacts the cam surface 13 and follows it. While moving, the outer end portion 21b is drawn into the body 1a and the fuel is supplied. And FIG. 1 (a)
The roller 22 rolls on the cam surface 15 between the ON position shown in (1) and the start position where the cam member 12 is further rotated clockwise, and the outer end portion 21 of the link member 21.
The fuel supply state in which b is drawn is maintained.

By changing the length of the link member 21, it is possible to change the direction in which the link member 21 extends and retracts with respect to the same cam portion. Further, since the roller 22 is used for the support portion of the link member 21 and the contact portion with the cam member 12, the durability is improved and the key can be operated with a small operation force.

<Effects of the Invention> As is apparent from the above-described embodiments, the steer rig lock device of the present invention is provided with the link member movable in the longitudinal direction, and the first cam surface formed in the diameter direction and the first cam surface. And a second cam surface continuously formed in the circumferential direction on the outer periphery of the cam member, and the inner end of the link member is pushed in a direction substantially perpendicular to the first cam surface. Is moved in the longitudinal direction, and the fuel cut control mechanism is operated by the movement of the link member.

As described above, since the link member is moved in the longitudinal direction by the cam surface on the outer periphery of the cam member, the shape of the cam member is relatively simple, there is a space in terms of space, and the durability is high.

Further, in the present invention, since the link member moves in the circumferential direction of the cam member, not in the diameter direction, and is retracted from the body, the link member can be moved with a large stroke while using the cam member having a relatively small diameter. Since the link member is arranged outside the cam member and surrounds the body along the outer circumference of the body, the link member does not project much from the body and the accommodation space is small, so that the size can be easily reduced.

As a result, according to the present invention, the device is easy to manufacture because the total number of parts is small and the structure is simple, the manufacturing cost is low, the stroke is large and the fuel supply and cutting operations are reliable. Can be obtained.

[Brief description of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 (a) and 1 (b) are front views of the main parts showing the operating state, respectively, and FIGS. 2 and 3 are the overall appearance. It is a front view and a side view showing. 1 …… Steering lock device, 1a …… Body, 11 ……
Connection part at the rear end of the cylinder inner, 12 …… Cam member, 13 ……
1st cam surface, 14 ... 2nd cam surface, 15 ... 3rd cam surface, 21 ... Link member, 21a ... Inner end part, 21b ... Outer end part.

Claims (1)

(57) [Claims] 1. A first cam surface formed in a diametrical direction, and a second cam surface and a third cam surface formed in a circumferential direction continuously on the outer diameter side and the inner diameter side of the first cam surface, respectively. And a cam member that is rotated by the rotor of the cylinder lock and an outer end that is connected to the fuel cut control mechanism and that is biased toward the inner end and that is arranged so as to surround the body of the steering lock device. An arc-shaped link member supported by a body so as to be capable of projecting and retracting in the longitudinal direction, and the inner end of the link member is on the third cam surface when the cam member is between the on position and the start position. When the cam member is in contact with the first cam surface when the cam member returns from the on position to the lock position and rotates, the cam member moves in a direction substantially perpendicular to the first cam surface and then rides on the second cam surface. Configured to stop moving Steering lock device according to claim the door.