JPH11115842A - Theft preventing device for bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the discrimination of lock condition at a glance by forming a folding frame to be folded around a pivot so that oscillation of a front and a rear frames can be locked in the condition that the front and the rear frames are oscillated and folded in the condition that traveling is impossible. SOLUTION: At the time of folding a bicycle so that the bicycle can not travel, a key 33 is inserted into a cylinder 32 fixed to a piston pin 10 for unlock, and thereafter, when a lever lock 28 supported by a lever main body 9 freely to be turned through a hinge pin 29 is pushed while resisting the energizing force of a twisted coil spring 31, engagement of the lever lock 28 and a stopper 34 is released. The lever main body 9 is lifted a little around a bolt and a nut 24, 25 of a bracket 23 provided in a main pipe 1, and thereafter, a piston 10 inserted into a holder 21 is pushed up by the restoring force of a compressed coil spring 22, and a tip part of the piston pin 10 is drawn out of a second piston lock hole 42 of a slider 20, and the slider 20 can be slid forward and backward in a rail 11 for folding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for a folding bicycle in which a front frame and a rear frame can swing about a substantially horizontal pivot. The present invention relates to an anti-theft device useful for a bicycle provided with a certain suspension.

[0002]

2. Description of the Related Art Conventionally, various devices have been proposed to prevent theft of a bicycle. Widely used anti-theft locking devices include cylinder locks that are installed at the front or rear forks to prevent a bar from entering the wheel spokes and make it impossible to travel, or a horseshoe that performs the same operation. There are tablets. Furthermore, various anti-theft devices are employed, such as a chain lock having locking portions that engage with each other at both ends, and turning of a handle is disabled.

[0003]

However, in such various conventional anti-theft devices, cylinder locks or horseshoe locks, in which a bar enters a gap between wheel spokes to make traveling impossible,
Furthermore, in the case of a chain lock or a handle non-reversing lock, at first glance it is not apparent from a distance whether or not the lock is locked, and it has been difficult to prevent an inexperienced person from approaching. In addition, these anti-theft devices allow the bicycle to run due to the destruction of the locking device and the like, and have not been said to be effective anti-theft devices. On the other hand, the applicant of the present application firstly configured the front frame and the rear frame so as to be able to swing around a substantially horizontal pivot, and provided a suspension for cushioning between these front and rear frames via a bracket. Suggested.

Accordingly, the applicant of the present application has focused on the fact that the above-mentioned bicycle constitutes a folding bicycle in which a front and rear frame provided with a suspension swings about a substantially horizontal pivot. An effective anti-theft device for bicycles that makes it possible to determine the locked state of the bicycle at a glance from a distance so that the inexperienced person can not be approached at a glance, and that if the locking device is destroyed, running will be difficult The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a folding bicycle in which a front frame and a rear frame are swingable about a substantially horizontal pivot. It is characterized in that it is configured to lock the swinging of these front and rear frames in a state where it is folded in an impossible state. The present invention also provides a buffer suspension between the front frame and the rear frame via a bracket, and one of the two ends of the suspension is slidable and lockable with respect to the frame. It is characterized by having done. Further, according to the present invention, the bracket of the suspension configured to be slidable and lockable with respect to the frame is provided in a traveling state and a traveling impossible state position at both ends of a swing range of the front and rear frames around the pivot. It is characterized by being configured to be lockable. Further, the present invention, in conjunction with the movement of the bracket of the suspension configured to be slidable and lockable with respect to the frame to a position where travel is impossible,
The present invention is characterized in that a barn of a horseshoe lock is made to enter the rotation locus of a wheel, and these are used as means for solving the problem.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention. FIG. 1 is an overall side view of a folded bicycle in a non-travelable state, FIG. 2 is an overall side view of a bicycle in a running state, and FIG. FIG. 4 is a bottom view showing an interlocking mechanism of a lock mechanism and a horseshoe lock. FIG. 2 is an overall side view of the bicycle in a running state, which is a normal position, and a handle 1 pivotally supported on a front end of a main pipe 1 so as to be freely turned.
A front wheel 18 is rotatably supported at the lower end of the front fork at the lower portion of 5, and a saddle 16 is inserted into a seat pipe 2 erected at the rear end of the main pipe 1. A front frame F is formed mainly of the main pipe 1 and the seat pipe 2, and a substantially horizontal pivot 5 is provided at a connecting portion between the main pipe 1 and the seat pipe 2. The front end of a substantially triangular rear frame R comprising a backhoek 3, a standing pipe 4, and a chain stay is pivotally supported by the pivot 5 so as to be swingable. A rear wheel 19 is pivotally supported at the rear end of the back fork 3, and a pedal 17 is pivotally supported via a crankshaft and a crank arm on a hanger which is a connection between the chain stay and the standing pipe 4.

In the present invention, a front frame F and a rear frame R
Between them, a suspension 6 for buffering is provided via a bracket, and one of the brackets at both ends of the suspension 6 is configured to be slidable and lockable with respect to the frame. In the example shown,
The rear end of the suspension 6 is pivotally supported by the first bracket 7 on the standing pipe 4 of the rear frame R, and the front end of the suspension 6 is fixed to the lower part of the main pipe 1 of the front frame F by the second bracket 8. It is configured so that it can slide and lock freely. It goes without saying that these related configurations may be reversed (the first bracket is configured to be slidable and lockable with respect to the standing pipe 4 of the rear frame R). The sliding operation of the second bracket 8 with respect to the rail 11 is enabled by the upward opening of the piston pin 10 interlocked with the swing of the lever body 9 installed on the upper part of the main pipe 1, and
Locking of the second bracket 8 in the traveling state and the traveling impossibility state is performed by selectively engaging the piston pin 10 with a pair of piston lock holes formed in a slider 20 which will be described later and integrated with the second bracket 8. Done. The bar of the horseshoe lock 12 installed on the rear wheel side via the first and second rods 13 and 14 in conjunction with the sliding of the slider 20 to the forward non-running folded state is inserted into the rotation locus of the wheel. It is configured to enter.

FIG. 1 is a side view of the entire bicycle showing a form in which the front and rear frames F and R swing close to each other around the pivot 5 and are folded so that they cannot run. The pedals are difficult to drive due to the front wheel fender, the saddle is high and it is difficult to ride, and the steering angle is also steep, making it difficult to operate the steering wheel freely. The lock mechanism will be described with reference to FIG. 3. In a normal running state, the piston pin 10 that can move up and down in a holder 21 fixed to the main pipe 1 has its tip end in front of the slider 20. While being inserted into the second piston lock hole 42, the slider 20 is pushed and locked by the lever body 9, and the slider 20 is moved to the rear position without sliding on the rail 11 (FIG. 3B).
2B, the second bracket 8 integrated with the slider is locked at a position in a normal running state. In this state, as shown in FIG. 2, the suspension 6 effectively absorbs the shock acting on the front and rear frames F and R during traveling by receiving the weight of the occupant sitting on the saddle 16. Ride comfort is improved without shock.

Next, as shown in FIG. 3A, the key 33 is inserted into the cylinder 32 fixed to the piston pin 10 to unlock the bicycle, and then the lever is brought into a folded state in which the bicycle cannot travel. When the lever lock 28 pivotally supported on the main body 9 by the hinge pin 29 is pressed against the torsion coil spring 31 against the urging force, the lock between the lever lock 28 and the stopper 34 is released, and the lever main body 9 is connected to the main pipe 1.
Bolts and nuts 24, 2 of the bracket 23 installed at
After the piston pin 10 is slightly lifted around the axis 5, the piston pin 10 inserted into the holder 21 is pushed up by the restoring force of the compression coil spring 22, and the tip of the piston pin 10 is moved to the second piston lock hole of the slider 20. 42, the slider 20 can slide back and forth in the rail 11. Reference numerals 26 and 27 indicate washers. In this state, when the saddle 16 shown in FIG. 2 is lifted,
Since the front and rear frames F and R swing close to each other around the pivot 5 by their own weight, as shown in the bottom views of FIGS.
1 slides forward in the rail 11 so that the first piston lock hole 40 reaches a position below the piston pin 10, and the entire bicycle frame is brought into the non-running folded state shown in FIG. At this time, the horseshoe lock 12 installed on the rear wheel 19 side is rotated by the bar actuation lever 37 via the first rod 13, the hinge 38 and the second rod 14 in conjunction with the forward slide of the slider 20. The bar 36 in the arc-shaped case 35 is caused to enter the rotation locus of the wheel. As a result, the rotation of the rear wheel 19 is also prevented. Reference numeral 39 denotes a guide fixed to a lower portion of the main pipe 1 and supporting the first rod 13.

Next, when the lever body 9 is lowered in the above state, the piston pin 10 is pushed down and its tip is inserted into the first piston lock hole 40 at the rear part of the slider 20, and the slider 20 is locked and fixed. . As a result, the second bracket 8 and the horseshoe lock 12 are locked, and the locking portion of the lever lock 28 is locked by the stopper 34, as shown in FIG. Dripping. In this state, as shown in FIG.
When the key 33 is inserted into the cylinder lock 32 provided in the piston pin 10 and rotated, a pair of piston stoppers 4 projecting radially from the tip of the piston pin 10 are provided.
As shown in FIG. 4 (B), the slider 20 is orthogonal to the elongated holes provided before and after the first piston lock hole 40.
It is locked and stopped. Thus the piston pin 10
Cannot be moved upward, and is locked. In the unlikely event that this is locked, the horseshoe lock 1
Even if 2 is destroyed, the frame cannot travel because the frame itself is in a folded state where it cannot travel. Further, when the cylinder lock 32 is broken, the slider 20 is always in a free state in the rail 11, so that the frame cannot be fixed to a normal running state, and running becomes extremely difficult.

In order to unlock the folded state of the bicycle, the key 33 is inserted into the cylinder lock 32 and rotated, whereby the piston stopper 41 is turned into the first piston lock hole 4.
The piston pin 10 is allowed to move upward, matching the elongated hole of 0. In this state, when the lever lock 28 of the lever body 9 is pressed, the lever body 9 and the piston pin 10 are lifted by the restoring force of the compression coil spring 22, and at the same time, the front and rear frames F by the own weight of the entire bicycle placed on the road. 2 and R swing about the pivot 5 in a direction away from each other, and the traveling state of FIG.
At this time, the slider 20 slides backward until the second piston lock hole 42 formed in the front part of the slide 20 is located below the piston pin 10, and the first
The horseshoe lock 12 is also unlocked via the second rods 13 and 14. Then, by lowering the lever body 9, the piston pin 10 is inserted into the second piston lock hole 42 of the slide 20, and the bicycle frame is locked in a normal running state.

The embodiment of the present invention has been described above. However, within the scope of the present invention, the shapes of the front frame and the rear frame, the swinging form by the pivot therebetween, the type of the suspension, and the suspension Related configuration of the bracket and the slider, a locking configuration of the bracket and the slider to the frame, an interlocking configuration of the slider and the horseshoe lock, a locking configuration of a locking device including a piston pin and a lever body for locking the slider,
The site where these lock devices are installed can be appropriately selected.

[0013]

As described in detail above, according to the present invention, in a folding bicycle in which a front frame and a rear frame are swingable about a substantially horizontal pivot, these front and rear frames are By swinging and folding the front and rear frames in a form in which the bicycle is folded so that the bicycle cannot travel, an abnormal appearance is exhibited when the bicycle is in a folded state where the bicycle cannot travel. As a result, the locked state of the bicycle can be determined at a glance even from a distance, and an opportunity to bring an inexperienced person closer is prevented. Moreover, even if the locking device is destroyed by an inexperienced person, the front and rear frames cannot maintain a normal running state, so that it becomes extremely difficult to run and unnatural running can be recognized by others. In other words, the effect of preventing theft beforehand becomes enormous.

A buffer suspension is interposed between the front frame and the rear frame via a bracket, and one of the two ends of the suspension is slidable and lockable with respect to the frame. According to this, the same anti-theft effect as described above can be achieved by maximizing the advantage of a folding bicycle in which the front and rear frames with the suspension interposed therebetween swing about a substantially horizontal pivot.

Further, the barb of the horseshoe lock enters the rotation locus of the wheel in conjunction with the movement of the bracket of the suspension, which is slidable and lockable to the frame, to the non-traveling position. In addition to the lock in a folded state where the frame cannot travel, the horseshoe lock that can prevent the rotation of the wheel can be locked, it is possible to double lock and it is safe, and once the saddle etc. is lifted Movement of the frame to a simple folded state allows simultaneous locking of both the frame and the wheels.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is an overall side view of a folded bicycle that cannot be driven.

FIG. 2 shows one embodiment of the present invention, and is an overall side view of a bicycle in a running state.

FIG. 3 illustrates one embodiment of the present invention, and is a diagram illustrating each part of a lock mechanism.

FIG. 4 shows one embodiment of the present invention, and is a bottom view showing an interlocking mechanism of a lock mechanism and a horseshoe lock.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main pipe 2 Seat pipe 3 Back fork 4 Standing pipe 5 Pivot 6 Suspension 7 First bracket 8 Second bracket 9 Lever body 10 Piston pin 11 Rail 12 Horseshoe lock 13 First rod 14 Second rod 15 Handle 16 Saddle 17 Pedal 18 Front wheel 19 Rear wheel 20 Slider 21 Holder 22 Compression coil spring 23 Lever bracket 24 Bolt 25 Nut 26 Washer 27 Washer 28 Lever lock 29 Hinge pin 31 Torsion coil spring 32 Cylinder lock 33 Key 34 Stopper 35 Case 36 Barta 37 Bar actuation lever 38 Hinge 39 Guide 40 First piston lock hole 41 Piston stopper 42 Second piston lock hole

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasumasa Takeda 3-1-1 Nakatsuma, Ageo City, Saitama Prefecture Inside Bridgestone Cycle Co., Ltd. (72) Inventor Mitsato Kasamatsu 3-1-1 Nakazuma, Ageo City, Saitama Prefecture Bridges Inside Toncycle Co., Ltd. (72) Inventor Tetsuji Nagata 3-1-1 Nakatsuma, Ageo City, Saitama Prefecture Inside Bridgestone Cycle Co., Ltd. (72) Inventor Hiroki Sakata 3-1-1 Nakatsuma, Ageo City, Saitama Prefecture Bridgestone Cycle Inside (72) Inventor Yoshihito Okuma 3-1-1 Nakatsuma, Ageo City, Saitama Prefecture Inside (72) Inventor Hideyoshi Saka 3-1-1 Nakatsuma, Ageo City, Saitama Bridgestone Cycle Co., Ltd. (72) Inventor Kenichi Tanaka 3-1-1 Nakazuma, Ageo-shi, Saitama Bridgestone Cycle Co., Ltd. Inside

Claims (4)

[Claims] 1. A folding bicycle in which a front frame and a rear frame are swingable around a substantially horizontal pivot in a state in which the front and rear frames are swung so as to be unable to travel. A bicycle anti-theft device characterized by being configured to lock the swing of these front and rear frames. 2. A buffer suspension is interposed between the front frame and the rear frame via a bracket, and one of the two ends of the suspension is slidable and lockable with respect to the frame. The anti-theft device for a bicycle according to claim 1, wherein: 3. A suspension bracket configured to be slidable and lockable with respect to the frame,
The anti-theft device for a bicycle according to claim 2, wherein the device can be locked in a traveling state and a non-traveling state position at both ends of a swing range of the front and rear frames around the pivot. 4. A barb of a horseshoe lock enters a rotation locus of a wheel in conjunction with movement of a bracket of a suspension configured to be slidable and lockable with respect to the frame to a position where travel is impossible. The bicycle anti-theft device according to claim 2 or 3, wherein: