JP2002029465A - Falling preventing device for bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight, compact and practical falling preventing device capable of minimizing a falling phenomenon of a bicycle and excellent in economy. SOLUTION: This falling preventing device for a bicycle is provided with a fulcrum fitting 2 provided on a frame to a front wheel in the position higher than the center of gravity of the bicycle, and at least one extensible or foldable strut 3 having one end attached to the fulcrum fitting 2 and the other end to be brought into contact with the ground in parking. A front wheel stopper is provided on the fulcrum fitting so as to make oscillation of 0 deg. of the front wheel as necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle fall prevention device when a bicycle is parked, and more particularly to a compact fall prevention device which is less likely to fall.

[0002]

2. Description of the Related Art A conventional device for preventing a bicycle from tipping over when parked is a U-shaped device having both ends pivoted on both sides of an axle of a rear wheel, and holding the rear wheel in a floating state when parked. There are two types of stand-up stands, one of which is a double-sided stand, and the other is a rod-shaped stand with the upper end attached to one side of the rear wheel axle, which holds the rear wheel in a slightly inclined state when parking. . Each of these stands is mounted on the axle of the rear wheel via a spring or the like, and is held on the bicycle in a substantially horizontal posture when traveling, and rotates about the axle side at about 90 degrees when the bicycle is parked to support the bicycle. It has become.

However, the conventional bicycle stand described above has the following problems. 1) In both the double-stand and single-stand stands, the fulcrum of the stand is located lower than the center of gravity of the bicycle, and the width of the base of the stand (hereinafter referred to as the span). About 300mm)
Because it is narrow, it is easy to overturn against crosswinds. For example,
Under the worst conditions, even a wind speed of about 5 m easily falls down. 2) When the bicycle is parked, the front wheel side is very unstable, and the front wheel and the steering wheel are linked to each other by 90 degrees to the left and right for a total of 1
There is a swing width of 80 degrees, which vibrates when receiving a crosswind and promotes a fall, which is one of the major causes of a fall of the bicycle. 3) Bicycle falling causes a chain of adjacent bicycles to fall, causing dents, breakage and abrasions of the bicycle itself,
There is also a risk of danger to the human body, impairing the safety of pedestrians, hindering traffic, and also requiring a great deal of labor to recover from a fall.

[0004]

As described above, falling down of a bicycle is a phenomenon that cannot be avoided as long as a stand having a conventional structure is employed, and this has a great effect on the bicycle itself, the human body and even pedestrians. Therefore, it has been strongly desired to prevent it. The present invention has been made in view of the above points, and it is possible to minimize the falling phenomenon of a bicycle as much as possible, and it is lightweight, compact, practical, and economical. It is an object to provide a fall prevention device.

[0005]

According to a first aspect of the present invention, there is provided a bicycle overturn prevention device according to the first aspect of the present invention, comprising: a fulcrum bracket provided on a frame closer to a front wheel at a position higher than a center of gravity of the bicycle; One end is attached to the fulcrum fitting, and the other end is grounded when the bicycle is parked. Further, the fall prevention device according to claim 2 is that in claim 1, the two columns in use are arranged so as to sandwich the front wheel so that the swing width of the front wheel is suppressed within 20 degrees left and right. Features. Further, the fall prevention device according to claim 3 is characterized in that, in claim 1, a jig extending from the fulcrum fitting and directly fixing the front wheel is provided so as to suppress the run-out width of the front wheel to approximately 0 degrees on the left and right. I do.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 shows an example of a fall prevention device in which two columns are extended and opened to support a bicycle, and each column can be extended or contracted or folded. That is, a fulcrum fitting 2 is attached to one end of the upper pipe (crossbar) 1 near the handle (front wheel side) of the bicycle frame, and two extendable supports 3 are pivotally mounted on the fulcrum fitting 2. The fulcrum fitting 2 must always be installed at a position higher than the center of gravity of the bicycle, but the position may be above the upper end of the front wheel 4 and below the handle mounting portion. Normally, in a general-purpose bicycle, the mounting position of the fulcrum fitting 2 is provided within a range of 700 to 1100 mm above the ground. The strut 3 extends to the maximum length when used, as shown in the figure, and is flared in contact with the ground to stably support the front wheel side of the bicycle. It is stored and held.

FIG. 2 shows a specific example of the fulcrum fitting 2 shown in FIG. 1. The cylindrical fitting main body 5 is attached directly to the outer periphery of the upper frame 1 via a packing.
And a column supporting portion 6 integrally attached to the supporting member. The cylindrical metal fitting main body 5 has a pair of flanges 7 and a column support metal 6 is attached to the flange 7 with bolts, nuts, or rivets, and the upper end of the column 3 uses one of these attachment locations. It is mounted to be rotatable. The support 3 rotates about the rotation support point 8 between the bicycle support position and the storage position substantially parallel to the upper frame 1. The column support 6 is formed in a C-shape in cross section as shown in the figure, and when the column 3 is extended to the bicycle supporting position, the column is opened in a divergent shape. Further, a dropping portion may be provided in the column supporting portion 6 so that the column 3 automatically becomes the optimum bicycle supporting position, or a similar measure may be taken at the rotating fulcrum position. A receiving member 9 for supporting the column 3 at the time of reduction and storage is attached to the upper frame 1 at a fixed distance from the fulcrum fitting 2. The receiving device 9 may be of a type that is permanently installed on the frame, or a type that is appropriately taken out and attached only during storage, or may simply have a band structure having a Velcro (registered trademark) part.

FIG. 3 shows another example of the fulcrum fitting.
It has a structure in which a bracket main body and a column supporting portion to be attached to a frame are integrally formed, and a lower mounting 11 having a tapered column supporting portion 10 downward is replaced with a semicircular upper mounting 1.
At 2, fix it to the upper frame 1 by tightening it with bolts and nuts or rivets. The fulcrum fitting is not limited to the illustrated example as long as it has a structure that can be firmly fixed to the bicycle frame and can stably hold the support. Further, the material of the fulcrum fitting is not limited to metal (for example, aluminum mold), but may be made of synthetic resin.

Next, a specific example of the support will be described. 4 (a) and 4 (b) are an exploded view and a contracted state view showing an example of a telescopic support column having an elliptical cross section and forming two triangular recesses facing the inner side in the axial direction and facing the center. . The cross section may be circular or polygonal, and knurling may be applied to the surface of the largest diameter pillar material. The struts are shown shorter than their actual lengths in order to make the structure easier to understand, and the same applies to other struts described later. As shown in FIG. 4, the columns are three column members 13, 1, 1, 2, and 3 each having a similar diameter and having an elliptical cross section.
4 and 15, each projecting two recesses 16 in the axial direction of the inner surface. Further, as shown in FIG. 4B, the upper portion of the first-stage support member 13 having a fixed length is compressed by a press with a reinforcing plate interposed therebetween to form a sandwich, thereby forming a fulcrum mounting portion 20. Is preferred. Further, a lever-type tightening band 17 is attached to the lower ends of the first and second-stage support members 13 and 14, and the outer peripheral upper portions of the second and third-stage support members 14 and 15 are provided. Are provided with two projections (stoppers) 18 opposed to each other, and the grounding cap 1 is provided at the lower end of the lowermost support member 15.
9 is covered. Normally, when not in use, it is in the contracted state shown in FIG. 4B (the band lever is in the tightened position). However, in use, if the lever is raised and the band 17 is loosened, each of the strut members 14 and 15 is under its own weight. Grows,
At this time, the mutual recesses 16 serve as a guide and stop at the position of the stopper 18. When the band lever is tightened in this state, the band 17 is tightened, and each support member is held in an extended state.

FIGS. 5 (a) and 5 (b) show a sectional groove type (C
2 shows an example of a support column in which a plurality of mold members are formed so as to be able to expand and contract with each other or be foldable. That is, FIG.
3A shows three similar strut members 21, 22, and 23 whose cross-sections are sequentially reduced downward, and these are arranged at the top of the lower strut members (22 and 23 in the figure). The fixed pin 24 is configured to be expandable and contractible by inserting an end formed on a flange portion of each member into a key-shaped elongated hole 25, and when extended, the pin 24 is at the lowermost end of the elongated hole of an adjacent member. At the time of reduction, the strut members of the second and subsequent stages can be accommodated in the strut members of the first stage so as to overlap with each other, and the pin is located at the top of the elongated hole of each member. In addition, 1
It is desirable to provide a plurality of stopper portions at one end of the elongated hole 25 of the column member 21 so that the length can be finely adjusted. FIG. 5 (b) shows three similar support members 26, 27 and 28 whose cross sections are sequentially reduced downward.
Is an example of a strut configured to be freely foldable by a pin 29 and an L-shaped hole 30. The pin 29 is simultaneously inserted into the L-shaped hole 30 of one adjacent column member and the hole 31 at the upper end of the other column member. It is desirable that the L-shaped hole 30 be provided with a stopper for adjusting the length in the same manner as (a) described above. At the time of extension, the pin 29 is located at any one of a plurality of stopper positions of the hole 30. At the time of folding, the pin 29 is located at the key portion side of the hole 30 and is folded by folding the member in the direction of the arrow. The folding order is such that it is folded sequentially from the bottom and finally stored in the first-stage column member. Although the examples of the extendable and foldable support columns have been described above, the present invention is not limited to the illustrated example,
It is also possible to adopt another known telescopic structure and folding structure, for example, a telescopic structure used for a tripod of a camera or a telescopic or folding structure used for a walking stick or the like.

In the bicycle overturn prevention device shown in FIG. 1, an example of two supports is shown.
This support may be attached to the front wheel side, and even if it is a two-type support, it is not limited to a straight support, but may have a deformed shape, for example, one support fixture side and a middle to lower part. For example, a bifurcated shape, a shape in which a horizontal bar is present at the ground contact position, a shape in which the strut portion is bent in a crank shape, and a single type of strut, a T-shaped shape in which the ground portion is a bar-like shape, a strut portion Is bent in a crank shape.

On the other hand, in the bicycle overturn prevention device shown in FIG. 1, the two pillars 3 are erected to extend and extend to support the bicycle when extended. However, as shown in FIG. Also functions as a steady rest of the front wheel 4. That is, in the type of FIG.
The vibration can be suppressed within the range of
The swing range of 80 degrees is greatly reduced to reduce the possibility of falling. In some cases, the deflection of the front wheels can be set to almost 0 degrees, but an embodiment thereof is shown in FIGS.

FIG. 6 shows an example of a front wheel stopper which can be moved up and down in a predetermined range in the vertical direction at the front side of the fulcrum member 2. And a scissor-shaped stopper 32 is provided through the intermediary. A ring 34 is also provided on the lower frame 33 of the bicycle so that the stopper 32 can be smoothly moved up and down via the rings 31 and 34 (a total of four rings are provided on the opposite side). Is preferred. The lower end of the stopper 32 is formed in a ring shape, and the front wheel 4 is sandwiched without any trouble at the lowered position shown in the figure, so that the runout is set to almost 0 degrees. Also,
The stopper 32 has a spring property such that the lower end always opens to the open side.

FIG. 7 shows an example of a swing type stopper 35 whose upper end is rotatably attached to a stopper holder 2a of the fulcrum member 2. The lower end of the stopper 35 has a ring shape for accommodating the front wheel 4. The middle portion is bulged so as not to interfere with the lower frame 33. In addition, in this example, it is necessary to devise such that it does not interfere with the support when removed from the front wheel 4. Further, the same effect can be obtained even if the stopper is not limited to the form of the structure extending from the fulcrum fitting 2 but may extend from the support, or the upper part of the support may be formed so as to sandwich the front wheel. Can be expected.

Although the illustrated examples are merely examples of the present invention, it is needless to say that the structure and the shape can be appropriately changed within the scope of the claims of the present invention. is there.

[0016]

According to the bicycle fall prevention apparatus of the present invention described above, the bicycle can be held at a position higher than the center of gravity mainly by supporting the unstable front wheel side of the bicycle and the span is widened. The possibility of doing this can be significantly reduced. As a result, it is possible to prevent falling when bicycles are parked, reduce damage to the bicycle itself, save labor for rebuilding when falling, and improve safety for the human body,
Its practical effect is very large.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a bicycle equipped with an example of a fall prevention device according to the present invention.

FIG. 2 is a detailed explanatory view of a fulcrum metal part of the overturn prevention device in FIG. 1;

FIG. 3 is an explanatory front view showing another example of the fulcrum fitting.

4A and 4B show an example of a pillar portion in the fall prevention device according to the present invention, wherein FIG. 4A is an exploded view of a pillar having an elliptical or circular cross section, and FIG.

5A and 5B show another example of a column portion in the overturn prevention device according to the present invention, wherein FIG. 5A is an example of a column-shaped stretchable column, and FIG. 5B is a channel-shaped foldable column. The perspective view which shows the example of a good support.

FIG. 6 is an explanatory view showing an example of a fall prevention device according to the present invention, which can reduce the deflection of the front wheels to almost 0 degrees.

FIG. 7 is an explanatory view showing another example of the overturn prevention device of the present invention capable of reducing the deflection of the front wheels to almost 0 degrees.

[Explanation of symbols]

Reference Signs List 1 bicycle upper frame 2 fulcrum fitting 3 support 4 front wheel 5 metal fitting body 6 support pillar support 7 metal fitting body flange 8 rotation fulcrum 9 receiving tool 10 pillar support 11 lower metal fitting body 12 upper metal fitting body 13-15, 21 to 23, 26 to 28 Support member 16 Depression 17 Tightening band 18 Stopper 19 Grounding cap 20 Mounting part 24, 29 Stop pin 25 Long hole 30 L-shaped hole 31, 34 Ring 32, 35 Stop fitting 33 Lower frame

Claims (3)

[Claims] 1. A fulcrum fitting provided on a frame near a front wheel at a position higher than a center of gravity of a bicycle, and at least one telescopic or foldable one end attached to the fulcrum fitting and the other end grounded when the bicycle is parked. A bicycle fall prevention device comprising a support post. 2. The overturn prevention device according to claim 1, wherein two struts in use are arranged so as to sandwich the front wheel so that the swing width of the front wheel is suppressed within 20 degrees left and right. 3. The overturn prevention device according to claim 1, further comprising a jig extending from the fulcrum fitting and directly fixing the front wheel so as to suppress the swing width of the front wheel to approximately 0 degrees in the right and left directions.