JPH0694749B2 - Motorcycle anti-theft device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing theft by connecting a two-wheeled vehicle to a structure such as a utility pole or by preventing the wheels from rotating.

[0002]

2. Description of the Related Art As an anti-theft device of this kind, conventionally, for example, as disclosed in Japanese Utility Model Publication No. 56-49813, a wire or a chain or a wheel for connecting a vehicle body of a motorcycle and a structure such as a utility pole. U to prevent rotation
Character-shaped lock fittings and the like are known.

As another example, as shown in, for example, US Pat. No. 3,747,376, a plurality of elongated bars are provided, and the ends of these bars are rotatably connected via rivets. Bar lock devices of known construction are known.

[0004]

However, if the wire or chain is required to have a length sufficient for breaking resistance against acts such as cutting and prying, or a length that can be easily handled, the whole device is heavy and large. In addition, it becomes difficult to compactly fold it into a certain shape, and it is easily bulky.

On the other hand, the one described in the US patent has the advantage that the bar can be sequentially folded at the rivet portion when the bar lock device is not used, and the bar is excellent in storability compared to chains and wires. Have

However, the rivet connecting the ends of a plurality of bars simply penetrates the bar, and both ends thereof are exposed on the bar. For example, the ends of the rivet can be hammered or the like. When hit, the rivet may be punched out of the bar. Therefore, the connecting portion of the bar is relatively easily broken, and there is still room for improvement in this respect.

The present invention has been made in view of the above circumstances. Even though the lock fitting body can be folded compactly, the breaking strength of the connecting portion of the rod-shaped body can be sufficiently ensured and the lock fitting body An object of the present invention is to provide an antitheft device for a two-wheeled vehicle, in which reliability in preventing disconnection is significantly improved.

[0008]

In order to achieve the above object, an anti-theft device of the present invention has a plurality of metallic rod-shaped bodies, and rotatably connects the ends of these rod-shaped bodies. Therefore, it is equipped with a lock fitting body that can be folded and can be deployed in a loop.

Then, a metal boss portion is integrally fixed to the end portion of the rod-shaped body, the boss portions of adjacent rod-shaped bodies are coaxially overlapped, and one of the boss portions is
In addition to providing a through hole that penetrates in the axial direction, the other boss portion has an opening that is continuous with the through hole, and has a concave portion integrally closed by a bottom wall on the opposite side to the opening. By pivotally inserting the pivot into the through hole of the boss, positioning the insertion end of the pivot in the recess through the opening, and retaining and retaining the recess in the recess through the locking means, It is characterized in that a plurality of rod-shaped bodies are rotatably connected to each other with a pivot as a fulcrum, and lock parts that are detachably connected by a locking operation are provided at both ends of the lock fitting body.

[0010]

According to this structure, when the lock fitting body is not used, a plurality of rod-shaped bodies can be freely bent at the pivot portion, and the overall shape of the lock fitting body when folded is compact. . Therefore, unlike a conventional wire or chain, it can be easily stored even in a narrow space.

Further, since the pivot for connecting the rod-shaped members penetrates the dedicated boss portion, it is hidden from the outside by this boss portion. At the same time, since the insertion end of the pivot is located inside the recess and is covered with the bottom wall from the outside, the insertion end of the pivot is not exposed to the outside of the rod-shaped body, It becomes impossible to punch from the boss. For this reason, the breaking strength of the connecting portion of the rod-shaped body is remarkably improved even though the lock fitting can be folded.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. In FIG. 1, reference numeral 1 indicates a lock metal fitting body for preventing theft of a motorcycle, and the lock metal fitting body 1 is constituted by connecting a plurality of rod-shaped bodies 2 to each other. The rod-shaped bodies 2 of the present embodiment are solid round rods made of, for example, carbon steel for machine structure or chrome molybdenum steel, and the ends of these rod-shaped bodies 2 ... Interpose a universal joint 3 made of metal. Are rotatably connected.

Since the structure of the universal joint 3 is the same, only one place will be described as a representative. That is, as shown in FIG. 2, cylindrical boss portions 4a and 4b are butt-welded to the ends of the adjacent rod-shaped bodies 2 and 2, respectively, and these boss portions 4a and 4b are coaxially overlapped. ing. Then, one boss portion 4a is provided with a through hole 5, and this through hole 5 is provided so as to penetrate the boss portion 4a in the axial direction.

The other boss portion 4b has a receiving recess 7. The receiving recess 7 has an opening 7a that is continuous with the through hole 5 of the one boss 4a, and the end opposite to the opening 7a is closed by a bottom wall 7b. 7b is integrated with the boss portion 4b to increase the strength.

As shown in FIG. 2, the boss portions 4a and 4b are pivotally connected by a pivot 6. The pivot 6 is provided with a shaft portion 6a and a large-diameter head portion 6b connected to one end of the shaft portion 6a, and the shaft portion 6a is inserted into the through hole 5 so as to be rotatable about the axis. The insertion end of the shaft portion 6a is
The shaft portion 6 is rotatably introduced into the receiving recess 7.
The introduction end of a and the boss portion 4b are connected by a pin 8 as a locking means. The pin 8 is driven so as to pass through the boss portion 4b and the shaft portion 6a in a posture orthogonal to the pivot 6 in the radial direction, whereby the lead-in end portion of the shaft portion 6a is prevented from slipping out into the receiving recess 7. Is held. The tip end of the pin 8 is covered with the rod-shaped body 2 connected to the boss portion 4b, and the pin 8 cannot be pulled out after the pin 8 is driven.

Therefore, the rod-shaped bodies 2 ... Are connected so as to be relatively rotatable in the same plane by 360 ° about the pivot 6 as a center of rotation, and by this connection, the adjacent rod-shaped bodies 2 ... While being folded in the state, the entire lock fitting body 1 can be expanded in a loop shape.

The head portion 6b of the pivot 6 has an outer diameter equivalent to that of the one boss portion 4a, and when the shaft portion 6a of the pivot 6 is inserted into the through hole 5, the through hole 5 is hidden. Contributes to the improvement of fracture resistance.

Further, both ends of the lock fitting body 1, that is,
Two rod-shaped bodies 2 and 2 facing each other when expanded in a loop
A lock portion 9 is provided at the tip of the. The lock portion 9 is composed of a lock mechanism 10 provided on one rod-shaped body 2 and a locking portion 11 provided on the other rod-shaped body 2.

As shown in FIG. 3, the lock mechanism 10 has an outer cylinder 12 coaxially welded to the tip of the rod-shaped body 2 and a lock cylinder 13 housed in the outer cylinder 12. The key insertion port 14 of the lock cylinder 13 is present at the opening of the tip of the cylinder 12. And the lock cylinder 1
3 is a lock bar 16 which is rotated by a key 15.
have. The lock bar 16 is configured to be reciprocally rotated in the outer cylinder 12 between a locked position and a released position, and the outer cylinder 12 has an outer peripheral surface to which the other rod-shaped body 2 is attached. An insertion opening 17 through which the locking portion 11 can be inserted / removed is opened.

On the other hand, the engaging portion 11 is formed by flattening a part of the outer peripheral surface of the tip of the rod-shaped body 2 and forming a cylindrical projection 19 on the flat surface 18. Part 1
A gap 21 into which the lock bar 16 is removably fitted is formed between 9 and the end surface 20 that is continuous with the end of the flat surface 18.

Therefore, when the locking portion 11 of the rod-shaped body 2 is inserted into the outer cylinder 12 from the insertion opening 17 and the key 15 inserted into the key insertion opening 14 is rotated to the locking position, the lock bar 16 is projected. The lock bar 1 is designed to enter the gap 21 while moving along the outer peripheral surface of the lock bar 1.
The rod-shaped body 2 is retained by the outer cylinder 12 by being held by the engagement between the protrusion 6 and the protrusion 6.

Next, a method of using the lock fitting body 1 will be described with reference to FIGS. 5 and 6. When the front wheel 22 of the motorcycle is to be prevented from rotating, as shown in FIG. 5, the lock fitting body 1 is unfolded and one end thereof is passed through the front of the front fork 23 and inserted between the spoke portions 25 of the disc wheel 24. Subsequently, the lock fitting body 1 is developed in a loop shape, and the tip end side thereof is passed through the rear side of the front fork 23 and inserted between the spoke portions 25. Then, the locking portion 11 is inserted into the insertion opening 17 of the outer cylinder 12, and the key 15 is rotated to the locking position to lock the locking portion 11 so that it cannot be pulled out. The lock prevents the front wheel 22 from rotating.

On the other hand, as shown in FIG. 6, when the front wheel 22 is fixed to a fixed construction 26 such as a utility pole or a pole of a guardrail, the lock fitting body 1 is straddled between the fixed construction 26 and the disc wheel 24. Then, the rod-shaped body 2 is hooked on the outer peripheral surface of the fixed construct 26 and the disc wheel 22 by deploying the rod-shaped body 2 in a loop. Then, the locking portion 11 is inserted into the insertion opening 17, and the key 15 is rotated to the locking position to lock the locking portion 11 so that the locking portion 11 cannot be pulled out, and the front wheel 22 is connected to the fixed structure 26.

According to this structure, the lock fitting body 1 is constructed by connecting a plurality of rod-shaped bodies 2 ... With the universal joints 3 ... The pivot 6 of the joint 3 can be freely bent around a fulcrum. For this reason, it is possible to fold one long locking metal fitting body 1 up to the length of a single rod-shaped body 2, and the whole is small and compact.

Further, in this case, since the rod-shaped bodies 2 ... And the universal joints 3 ... Are made of high hardness metal and have high rigidity, it is not necessary to easily break them. As shown in FIG. 4, the rod-like bodies 2 are easily folded and bundled into a bundle, and the shape of the lock fitting body 1 when folded is constant.

Therefore, when the lock fitting body 1 is not used, it is not bulky like a conventional cable or wire, and the storability is remarkably improved, so that it can be easily stored even in a narrow space. At the same time, since the folded shape of the lock fitting main body 1 is compact and bundled together, it can be easily housed in the tubular case 29 as shown by an imaginary line in FIG. 4, for example. For this reason,
It can be attached to various parts of the motorcycle, such as the bar handle, carrier or frame, and can be carried around freely.
Especially, it becomes convenient for carrying.

Further, according to the above construction, cylindrical boss portions 4a, 4b coaxially superposed on the end portions of the rod-shaped bodies 2 ...
Since the shaft portion 6a of the pivot 6 is inserted through the boss portions 4a and 4b, the shaft portion 6a is hidden from the outside by the boss portions 4a and 4b. At the same time, since the receiving recess 7 into which the insertion tip of the shaft 6a is inserted has the bottom wall 7b, the insertion tip end of the pivot 6 is not exposed to the outside of the lock device body 1 and the pivot 6 is bossed. The parts 4a and 4b cannot be punched out.

Therefore, the rod-shaped body 2 ...
The fracture resistance of the connecting portion of can be remarkably increased, and the reliability in preventing breakage and separation of the lock fitting body 1 deployed in a loop shape is improved.

In the above embodiment, the lock mechanism is integrally incorporated at the end of the lock fitting body. For example, lock holes are formed at both ends of the lock fitting body so that they are opposed to each other when they are deployed in a loop. Alternatively, another padlock may be used for locking with these lock holes aligned. Further, the rod-shaped body is not limited to a solid round bar, and may be formed of, for example, a pipe or an elongated plate material.

[0030]

According to the present invention described in detail above, when the lock fitting body is not used, it can be folded into a compact and fixed shape, so that the lock fitting body is not bulky and accordingly Storability is greatly improved.

Moreover, the pivot for connecting the rods is covered from the outside by a dedicated boss, and the recess into which the insertion tip of this pivot is inserted has a bottom wall, so that the insertion end of the pivot is locked. It is not exposed to the outside of the body and the pivot cannot be punched out of the boss. Therefore, even though the lock fitting body can be folded at the pivot portion, the breaking resistance of the connecting portion of the rod-shaped body can be significantly increased, and the lock fitting body that has been deployed in a loop shape can be broken or separated. There is an advantage that the reliability in blocking is improved.

[Brief description of drawings]

FIG. 1A is a plan view showing a state where a lock fitting body according to an embodiment of the present invention is spread in a loop shape. FIG. 1B is a side view of the lock fitting body viewed from the direction of the line A in FIG.

FIG. 2 is a sectional view of a universal joint.

FIG. 3 is a cross-sectional view of the lock portion of the lock fitting body.

FIG. 4A is a plan view of a state in which the lock fitting body is folded. (B) shows the lock metal fitting body in B of FIG. 4 (a).
The side view seen from the line direction.

FIG. 5 is a perspective view showing a state in which the front metal of the motorcycle is stopped by the lock fitting body.

FIG. 6 is a perspective view showing a state where the front wheel of the motorcycle and the fixed structure are connected by a lock fitting body.

[Explanation of symbols]

1 ... Lock metal body, 2 ... Rod-shaped body, 4
a, 4b ... Boss portion, 5 ... Through hole, 6 ... Axis, 7 ... Recessed portion (receiving recessed portion),
7a ... opening, 7b ... bottom wall, 8 ...
Locking means (pin), 9 ... Lock part.

Claims (1)

[Claims] 1. A lock fitting main body having a plurality of metal rod-like bodies, which is foldable by connecting the ends of the rod-like bodies rotatably and which can be deployed in a loop shape. In an anti-theft device for a motorcycle, a metal boss is integrally fixed to the end of the rod-shaped body,
The boss portions of adjacent rod-shaped bodies are coaxially overlapped with each other, and one of the boss portions has a through hole penetrating in the axial direction, and the other boss portion has an opening continuous with the through hole. And a concave portion integrally formed with the bottom wall on the opposite side to the opening is provided, and the pivot shaft is rotatably inserted into the through hole of the one boss portion,
The insertion end of the pivot is located in the recess through the opening, and is retained in the recess by locking means so that the plurality of rod-shaped bodies are rotatably connected to each other about the pivot. A two-wheeled vehicle anti-theft device, characterized in that lock parts that are detachably connected by a locking operation are provided at both ends of the lock fitting body.