JPH03224877A - Steering lock device for motor scooter - Google Patents

Abstract

PURPOSE:To arrange so that the release of steering lock by means of the insertion of a driver may not be conducted, by providing at the upper part of a key rotor a spacer portion formed with a spacer key groove that is so deep that even if the driver is inserted in a shape opposing a key hole, it does not reach the key rotor. CONSTITUTION:At a scooter, a steering shaft 20 at whose upper end a handle 12 is fixed, is turnably supported at a head pipe 17 at a scooter body front end, and a steering lock device 21 is provided at this head pipe 17. This lock device 21 makes a turning movement by inserting a key into a key hole 27, and key rotor 23 is allowed to rotate by releasing the operation of a tumbler 28, and a lock bar 30 is engaged with and disengaged from a lock hole by means of this rotation through a joint 25 and a drive cam 24. In this instance, a spacer portion 33 which is formed with a spacer key groove 34 that is so deep that, even if a driver is inserted in a shape opposing a key hole 27, it does not reach the key rotor 23, is rotatably provided at the upper part of the key rotor 23.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a steering lock device for a motorcycle that locks a front fork device to prevent the motorcycle from being stolen.

(Prior Art) A conventional steering lock device generally serves as a main switch, and the cylinder body 1 of the steering lock device shown in FIG. 5 is attached to a head pipe (not shown) via a mounting plate (not shown) or the like. It will be done. Insert an engine key (not shown) into the key hole 3 of the key rotor 2 in this steering lock device, rotate the engine key to a predetermined position (LOCK position), and lock the lock bar (not shown) between the head pipe and the steering shaft (
The front fork device is locked by engaging the lock hole (both not shown). Note that the reference numeral 4 in FIG. 5 indicates a tumbler.

(Problem to be Solved by the Invention) In the conventional steering lock device as described above, if a flathead screwdriver is driven into the key hole 3 with a /'% mark, etc., and the flathead screwdriver is rotated using pliers, etc., the tumbler 4 There is a risk that the key rotor may be damaged, the key rotor may rotate, the lock bar may move backward, and the front fork device may be unlocked. Moreover, at this time, the main switch was also ON.

Therefore, there is a risk that the motorcycle may be stolen.

This invention was made in consideration of the above circumstances,
An object of the present invention is to provide a steering lock device for a motorcycle that can prevent the device from being destroyed and avoid theft of the motorcycle.

[Structure of the invention]

(Means for Solving the Problems) In the present invention, a key rotor is disposed within a cylinder body, and when a key is inserted into a key hole of the key rotor and rotated, a lock bar protrudes from the cylinder body and a front fork device is provided. In the steering lock device for a motorcycle, the spacer portion is provided above the key rotor and is rotatable in the same direction as the key rotor, and the spacer portion is formed to correspond to and pass through the key hole. In addition, the device is characterized by having a spacer keyway having a depth that does not reach the key rotor even if a driver is inserted.

(Function) Therefore, according to the steering lock device for a motorcycle according to the present invention, a spacer portion that is rotatable in the same direction as the key rotor is installed above the key rotor, and a third person inserts the driver into the spacer key groove of the spacer portion. Even if it is inserted and rotated, this driver will not reach the key rotor, so only the spacer part will be rotated by the driver.
The key rotor does not rotate and cannot be damaged. Therefore, it is possible to maintain the protruding state of the lock bar and prevent the front fork device from being unlocked, thereby avoiding theft of the motorcycle.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of a steering lock device for a motorcycle according to the present invention, and FIG. 3 is an overall side view showing a motorcycle (scooter) to which the steering lock device of FIG. 1 is applied. It is a diagram.

As shown in FIGS. 3 and 4, the scooter has a front wheel 1
The space between the handle 12 for operating the seat 1 and the seat 13 is deeply curved in a U-shape.

The seat 13 is attached to a vehicle body frame 14 formed in a curved shape.
located on the rear of the A head pipe 17 is fixed to the front end of this body frame 14. A front fork device 18 including a handle 12 is attached to the head pipe 17. This front fork device 18 has two left and right
Steering shaft 2 between front fork 19
0 is installed upright, and the steering shaft 20
A handle 12 is fixed to the upper stage of the handle. The front fork device 18 is provided with a steering shaft 20 passing through the head pipe 17 so as to be rotatable in the left-right direction of the vehicle body.

Further, the rear wheel 15 is integrally configured with an engine unit 16, and the engine unit 16 is supported by the vehicle body frame 14 by a shock absorbing unit (not shown) and is shock-suspended.

Now, the steering lock device 21 is attached to the head pipe 17 in the vehicle body frame 14. As shown in FIG. 1, this steering lock device 21 includes a spacer portion 33 and a key rotor 23 disposed in the upper part of a cylinder body 22, and a drive cam 24 rotatably housed in the lower part. These key rotor 23 and drive cam 24 are connected by a joint 25. The spacer portion 33 will be described later.

A key hole 27 into which an engine key 26 can be inserted is formed in the key rotor 23, and a tumbler 28 is installed therein. By inserting a proper engine key 26 into the key hole 27 and rotating it, the operation of the tumbler 28 is released and the key rotor 23 rotates, and this rotation passes through the joint 25 and rotates the drive cam 24 around its axis. .

The drive cam 24 penetrates and is engaged with the driven cam 29, and the lock bar 30 is fitted into the driven cam 29. The lock par 30 is provided so as to be movable back and forth in the left and right horizontal directions in the figure via the driven cam 29 by the rotation of the drive cam 24 around the axis.

This lock par 30 also reciprocates within a lock bar guide portion 31 that forms a part of the cylinder body 22. This lock bar guide portion 31 is molded integrally with the cylinder body 22. The lock par 30 moves forward within the lock bar guide portion 31, projects to the position indicated by the two-dot chain line in FIG. locked (
steering lock).

By the way, as shown in FIG. 1, the above-mentioned spacer section 33 is located above the key rotor 23 within the cylinder body 22, and is provided so as to be rotatable in the same direction as the key rotor 23. A spacer keyway 34 is formed in this spacer portion 33 in a penetrating state corresponding to the keyhole 27 of the key rotor 23 . Further, the spacer portion 33 has a spacer key groove 34
Even if a flathead screwdriver is inserted into the key rotor 23, the length of the screwdriver will not reach the key rotor 23.
The spacer key groove 34 is constructed to have such high hardness that it will not be damaged even if a flathead screwdriver is inserted into the spacer key groove 34.

Such a spacer portion 33 is housed in a cylindrical housing 35 disposed within the cylinder body 22, and is prevented from shifting. This housing 35 is fixed to the key rotor 23 by a rotation and removal prevention pin 36. Therefore, the spacer portion 33 is
The key rotor 23 is provided so as to be rotatable in the same direction as the key rotor 23, independently of the key rotor 23. This housing 35 is
The key rotor 23 is secured by the rotation and removal prevention pin 36.
Fixed.

Further, within the housing 35, a positioning spacer 37 is disposed between the spacer portion 33 and the key rotor 23.

This positioning spacer 37 is engaged with the key rotor 23 and the spacer portion 33 to align the spacer key groove 34 of the spacer 33 with the key hole 27 of the key rotor 23 and maintain this state. The holding of the spacer portion 33 by the positioning spacer 37 is released at a torque equal to or lower than the breaking torque of the tumbler 28 of the key rotor 23, and the spacer portion 33 is configured to be able to rotate relative to the key rotor 23.

According to the above embodiment, the spacer section 33 is installed above the key rotor 23 and is rotatable in the same direction as the key rotor 23 independently of the key rotor 23, and someone else inserts a flathead screwdriver into the spacer key groove 33 of the spacer section 33. Since this driver does not reach the key rotor 23 even if it is inserted and rotated, only the spacer portion 33 is rotated by the driver, the key rotor 23 is not rotated, and the tumbler 29
There is no possibility of damage. Therefore, the protruding state of the lock par 30 is maintained, and unlocking of the front fork device 18 can be prevented, so that theft of the motorcycle can be avoided.

Furthermore, when a flathead screwdriver is inserted into the spacer portion 33 and rotated with a torque greater than the destructive torque of the tumbler 28, the holding of the spacer portion 33 by the positioning spacer 37 is released and only the spacer portion 33 rotates. When the positioning spacer 37 is not destroyed,
The engagement with the key rotor 23 and the spacer portion 33 is simply released. Therefore, after forced rotation of only the spacer portion 33, the spacer key groove 34 of the spacer portion 33 can be aligned again with the key hole 27 of the key rotor 23 using the positioning spacer 37. As a result, the steering lock device 21 can be reused even after the spacer portion 33 is forcibly rotated by another person.

Further, in the above steering lock device 21, the spacer 33 is added to the structure of the conventional steering lock device and the cylinder body 22 etc. are slightly improved, so that there are few changes in the structure and no increase in cost occurs.

〔Effect of the invention〕

As described above, the steering lock device for a motorcycle according to the present invention has a spacer portion above the key rotor that is rotatable in the same direction as the key rotor, and this spacer portion has a spacer portion that corresponds to the key hole. The spacer key groove is formed through the spacer and has a depth that does not reach the key rotor even if a screwdriver is inserted, so even if someone tries to rotate the key rotor with a screwdriver, only the spacer section will rotate. Therefore, damage to the steering lock device can be prevented, and theft of the motorcycle can be avoided.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of a steering lock device for a motorcycle according to the present invention, and FIG.
3 is an overall side view showing a motorcycle (scooter) to which the steering lock device shown in FIG. 1 is applied; FIG. 4 is a perspective view showing the body frame of the scooter shown in FIG. 3;
FIG. 5 is a partial sectional view showing a key rotor portion of a conventional steering lock device. 1 14...Vehicle frame, 18...Front fork device, 22...Cylinder body, 23...Key rotor, 26...Engine key, 27...Key hole, 30
...Lock bar, 33...Spacer part, 34...
Spacer keyway, 35... Housing, 37... Positioning spacer.

Claims (1)

[Claims] A steering lock device for a motorcycle in which a key rotor is disposed within a cylinder body, and when a key is inserted into a key hole of the key rotor and rotated, a lock bar protrudes from the cylinder body to lock a front fork device. A spacer part is provided above, which is rotatable in the same direction as the key rotor, and the spacer part is formed so as to correspond to and pass through the key hole, and even if a driver is inserted, it will not reach the key rotor. A motorcycle steering lock device characterized by having a deep spacer keyway.