JPS6260302B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides that while the steering lock device is locked,
This invention relates to a steering lock destruction prevention device that prevents the steering lock from being destroyed by tools.

Conventionally, in this type of device, when a key inserted into a cylinder lock is removed, a locking rod protrudes and engages a shaft in a steering column, thereby preventing rotation of the steering wheel. In this way, theft is prevented by preventing the steering wheel from turning, but even so, if a tool such as a crowbar is hooked to the steering wheel and the steering wheel is forced to turn, the steering lock may be disabled. The disadvantage was that the device could be destroyed and the steering wheel could be turned freely, allowing the car to be stolen.

The present invention has been made by focusing on such drawbacks, and its purpose is to prevent the steering device from being destroyed even when the steering wheel is forcibly turned by a tool or the like. To,
A rotatable elastic pipe with a split groove is attached to the shaft to which the handle is fixed, and the locking rod that protrudes when the key is removed from the cylinder lock is engaged in the split groove, that is, when the lock is locked. When the handle is forcibly rotated, this pipe expands while still being engaged with the locking rod, allowing the shaft to rotate against great resistance without bending the locking rod. In addition, there is a destruction prevention device for the steering lock that prevents smooth operation of the steering wheel.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings together with a conventional embodiment.

FIG. 1 is a diagram showing one embodiment of the fraudulent means, and A is a tool that is hung on the handle B to forcibly rotate the handle B. C is the steering column,
A shaft 1 is fitted inside the steering column C, and one end of the shaft 1 is fixed to a handle B, and the other end is connected to a steering axle (not shown). Reference numeral D represents a steering lock device, and a cross-sectional view of the main part of this device is shown in FIG. The cylinder lock 3 is rotated by the cylinder lock 3 (not shown), the check lever 4 is activated when the key is inserted into or removed from the cylinder lock 3, and the rotor (not shown) of the cylinder lock 3 rotates with the rotation of the key. A rotating cam 5 that rotates at times, a hanger 6 engaged with the rotating cam 5, a spring 7 that constantly biases the hanger 6, and a locking rod 8 fixed to the hanger 6 are provided. When the hanger 6 is moved backward while rotating the rotary cam 5 in the unlocking direction, the locking rod 8 resists the spring 7 and locks the shaft 1.
Since the shaft 1 and the handle B are separated from the groove 9' of the pipe 9 fitted in the shaft 1, the shaft 1 and the handle B rotate together.

In addition, conventionally, the pipe 9 is fixed to the shaft 1 with the knock pins 10, 10', so if the shaft 1 is forcibly rotated together with the handle B while the lock is locked, the knock pins 10, 10' may be cut off.
Alternatively, the locking rod 8 may be bent or the pipe 9 may be scratched, making it impossible to maintain the locked state.

Therefore, in the present invention, a groove 11' is formed in the pipe 11 made of an elastic material, and a groove 11' is formed on the inner circumferential wall surface 12 of this pipe 11 in the same shape as the shaft 13, that is, the opposing surface is formed into a flat surface 1a and an arc surface 1b. , the cross section is not circular like the conventional one, but has an irregular shape. The pipe 11 is fitted until it contacts the bulging surface 14 of the shaft 13, and the pin 15 is fitted into the small hole 13' formed in the shaft 13 to prevent the pipe 11 from coming off the shaft 13. .

FIGS. 4 1 and 2 are sectional views of the main parts when the lock is locked, 1 is a diagram of the operation when the lock is locked, and 2 is an operation diagram when the lock is illegally unlocked. As shown by the arrow, the shaft 13 is forced to rotate When the pipe 11 is opened, one end of the groove 11' of the pipe 11 expands while being engaged with the locking rod 16 and returns to a predetermined position.

As described above, since neither the shaft 13 nor the inner circumferential wall surface of the pipe 11 is circular, the handle B cannot be operated smoothly.

As shown in FIG. 5, the pipe 17 may be made of an elastic resin material. In that case, high-tensile steel plates are placed on both sides of the groove 17' to reduce wear of the resin.
It is more effective to insert the tubes 8 and 18' when forming the pipe 17.

In the present invention, as described above, the groove is formed in the pipe and the pipe is made of an elastic material, so even if the handle is forcibly turned during locking, the locking rod or pipe will not be damaged. This also has the effect of preventing theft.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the unauthorized unlocking means, Fig. 2 is a side sectional view of the main part during conventional locking, Fig. 3 is a perspective view of the present invention, and Fig. 4 1 and 2 are during locking and unauthorized unlocking. FIG. 5 is a cross-sectional view of the main part of the resin pipe. A...Tool, B...Handle, C...Steering column, D...Steering lock device,
1, 13... Shaft, 9, 11, 17... Pipe, 9', 11', 17'... Division groove.

Claims (1)

[Claims] 1. A shaft having a substantially rectangular cross section and a pipe made of an elastic material that is fitted into the shaft and whose inner circumferential wall surface is in contact with the shaft, and a split groove into which the locking rod engages is formed in this pipe, and the locking lever is engaged with the split groove. A device for preventing destruction of a steering lock, characterized in that a pipe is expanded when the shaft is rotated with the steering lock in place.