JP3211588B2 - Apparatus for preventing falling off of front wheel for bicycle and bicycle equipped with the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a front wheel of a bicycle from falling off from a front fork.

[0002]

2. Description of the Related Art Conventionally, this type of a bicycle front wheel drop-prevention device has been configured as shown in FIGS.
Hereinafter, the configuration will be described.

[0003] As shown in the figure, a front fork 1 has a cylindrical portion 2.
The claw 3 is formed by crushing the tip of the claw 3. The claw 3 is provided with an engaging hole 4 and a locking hole 5. A lock piece 7 that fits into the lock hole 5
And an insertion hole 9 into which the front axle 8 is inserted. The insertion hole 9 is provided at a position corresponding to the engagement hole 4 when the engagement piece 7 is fitted in the engagement hole 5 of the front fork 1.

In the above configuration, the front axle 8 is inserted into the engagement hole 4 provided in the claw portion 3 of the front fork 1, and the front axle 8 is inserted into the insertion hole 9 of the drop-off preventing washer 6, and the locking piece 7 is engaged. The front axle 8 is inserted into the lock hole 5, the basket stay 10 and the mudguard stay 11 are inserted, and the nut 13 is fastened to the front axle 8 via the washer 12.

Therefore, the fall-prevention washer 6 is provided with a locking piece 7.
Can be fitted to the locking hole 5 and fixed to the claw portion 3 of the front fork 1. Even if the nut 13 is loosened, the front axle 8 does not fall off even if the nut 13 is loosened. Since it is inserted into the insertion hole 9 of the washer 6, it is possible to prevent the front wheel from falling off.

[0006]

In such a conventional structure, a locking hole 5 must be provided in the claw 3 of the front fork 1 in order to fix the drop-prevention washer 6 to the claw 3 of the front fork 1. However, there is a problem that extra man-hours are required in order to provide the locking hole 5 in manufacturing. In addition, since the pre-made front fork does not have the locking hole 5, the washer is prevented from falling off by repair or the like. 6 cannot be attached.

[0007] The present invention is intended to solve the above problems, and attach the stopper member without the extra processing before fork, and a purpose to make it possible to prevent falling off of the front wheels.

It is another object of the present invention to make one kind of fall prevention member applicable to all types of vehicles such as sports vehicles, light vehicles, children's vehicles, etc., to improve assemblability and serviceability and to reduce the cost.

[0009]

Means for Solving the Problems The present invention to achieve the above Symbol purpose, the locking means 1 for engaging the claw portion 3 of the front fork 1
5 and a drop-off preventing member 14 having an insertion hole 16 into which the front axle 8 is inserted. The front axle 8 is inserted into the insertion hole 16, and the nut is inserted through the claw 3 of the front fork 1 and the drop-off preventing member 14. 13. A device for preventing falling of a front wheel for a bicycle fastened by 13, wherein a locking means 15 is composed of two locking pieces having an interval smaller than the width of the claw 3 of the front fork 1. The stopper has an arc shape having a diameter substantially equal to the diameter of the cylindrical portion 2 of the front fork 1 and a central angle larger than 180 degrees, and has a cylindrical portion of the front fork 1 between the two locking pieces. 2 is inserted, the drop-prevention member 14 is moved to the claw 3 side, and the locking means 15 is locked to the claw 3 of the front fork 1 as a first problem solving means.

[0010]

The second problem solving means is that the locking piece of the falling-off prevention member of the first problem solving means is formed of an elastic resin.

A third aspect of the present invention is a bicycle provided with the first or the second aspect .

[0013]

[0014]

According to the first aspect of the present invention, there is provided :
Even if the loose nuts 13, the front axle 8, before Hawk
Since it is supported by the fall prevention member 14 locked to the first claw portion 3 , the front wheel can be prevented from falling.

[0015]

[0016]

Further, according to the first means for solving the problem, the space between the locking pieces of the falling-off prevention member 14 is inserted into the cylindrical portion 2 of the front fork 1, and the locking piece is fitted to the cylindrical portion 2 of the front fork 1. By doing so, the front axle 8 can be locked to the claw portion 3 of the front fork 1 of any vehicle type, and even if the nut 13 is loosened, the front axle 8
Since it is supported by the fall prevention member 14 locked to the claw portion 3 of the front fork 1, the fall of the front wheel can be prevented.

Further, according to the second means for solving the problem, the falling-off preventing member 14 having an arc-shaped elastic locking piece having a diameter substantially equal to the diameter of the cylindrical portion of the front fork and having a center angle larger than 180 degrees can be easily provided. Can be formed.

[0019]

1 to 3 show a first embodiment of the present invention.
This will be described with reference to FIG. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in the figure, a drop-off preventing washer (drop-off preventing member) 14 has a locking claw (locking means) 15 for locking to the claw portion 3 of the front fork 1 and an insertion hole into which the front axle 8 is inserted. 16
The insertion hole 16 is provided with an engagement hole 4 provided in the claw portion 3 of the front fork 1 in a state where the locking claw 15 of the drop-prevention washer 14 is locked to the claw portion 3 of the front fork 1. They are provided at the same position.

The locking claws 15 are provided so as to be wider than the diameter of the cylindrical portion 2 of the front fork 1 and have a smaller interval than the width of the claw portion 3 of the front fork 1. Further, the fall-prevention washer 14 is formed with a bent portion 17 at least on both sides near the insertion hole 16 into which the front axle 8 is inserted, and the claw portion 3 of the front fork 1 is fitted between the bent portions 17. I have.

In the above configuration, the cylindrical portion 2 of the front fork 1 is inserted between the locking claws 15 of the drop-preventing washer 14, and the drop-preventing washer 14 is moved to the claw portion 3 so that the locking claw 15 is moved to the front fork. The first claw 3 is locked. In this state, the engagement hole 4 formed in the claw portion 3 of the front fork 1 and the insertion hole 16 of the drop-prevention washer 14 match, and the front axle 8 is inserted into the insertion hole 16 to prevent the basket stay 10 from being mud-proof. The front axle 8 is inserted into the stay 11, and the nut 13 is fastened to the front axle 8 via the washer 12.

Therefore, the fall-prevention washer 14 can be fixed to the claw portion 3 of the front fork 1 by locking the locking claw 15 to the claw portion 3 of the front fork 1, and even if the nut 13 is loosened. Even in this case, the front axle 8 does not fall off from the front fork 1, and the front axle 8 is
The front wheels can be prevented from falling off.

Further, the locking washer 14 is formed by two locking claws 15 which are wider than the diameter of the cylindrical portion 2 of the front fork 1 and narrower than the width of the claw 3 of the front fork 1. Therefore, the cylindrical portion 2 of the front fork 1 is inserted between the locking claws 15 of the fall-prevention washer 14, and the fall-prevention washer 14 is
The locking claw 15 can be locked to the claw portion 3 of the front fork 1 by moving to the side.

The fall-off preventing washer 14 has bent portions 17 at least on both sides near the insertion hole 16 into which the front axle 8 is inserted, and the claw portion 3 of the front fork 1 is fitted between the bent portions 17. Therefore, the claw 3 of the front fork 1 can be fitted between the bent portions 17 in a state where the locking claw 15 of the fall-prevention washer 14 is locked to the claw 3 of the front fork 1. The fall prevention washer 14 can be positioned, and the front wheel can be reliably supported by the fall prevention washer 14.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, the fall-off washer (drop-off prevention member) 18 is formed of an elastic resin such as polyacetal resin or polypropylene resin, and has a diameter substantially equal to the diameter of the cylindrical portion 2 of the front fork 1. A locking means is formed by an arc-shaped elastic locking piece 19 having a central angle wider than 180 degrees, and the locking piece 19 is fitted to the cylindrical portion 2 of the front fork 1, and is attached to the claw 3 of the front fork 1. It is locked. Insertion hole 2
Reference numeral 0 denotes a state where the locking piece 19 of the drop-prevention washer 18 is locked to the claw 3 of the front fork 1 and is provided at a position corresponding to the engagement hole 4 provided in the claw 3 of the front fork 1.

In the above configuration, the gap between the tips of the locking pieces 19 is widened by utilizing the elasticity of the falling-off preventing washers 18, and the cylindrical portion 2 of the front fork 1 is located between the locking pieces 19 of the falling-off preventing washers 18. Is inserted and fitted, and the drop-prevention washer 18 is moved to the claw 3 side to lock the locking piece 19 with the claw 3 of the front fork 1. In this state, the engagement hole 4 formed in the claw portion 3 of the front fork 1 and the insertion hole 20 of the drop-prevention washer 18 match, and the front axle 8 is inserted into the insertion hole 20 so that the basket stay 10 and the mudguard are removed. Insert the front axle 8 into the stay 11, and
2, the nut 13 is fastened to the front axle 8.

Therefore, the fall-prevention washer 18 can be fixed to the claw 3 of the front fork 1 by fitting the locking piece 19 to the cylindrical portion 2 of the front fork 1 and locking to the claw 3. Even if the nut 13 is loosened, the front axle 8 does not fall off from the front fork 1 and the front axle 8 is inserted into the insertion hole 16 of the fall-prevention washer 18, so that the front wheel can be prevented from falling off. it can.

[0030]

[0031]

[0032]

[0033]

The first object of the present invention is to provide a drop-off preventing member 14 having a locking means 15 for locking the claw 3 of the front fork 1 and a insertion hole 16 for inserting the front axle 8. A front wheel axle 8 is inserted through the hole 16 and is fastened by a nut 13 via the claw 3 of the front fork 1 and the falling-off preventing member 14;
It consists of two locking pieces having a smaller interval than the width of the claw portion 3 of the front fork 1, and the two locking pieces are the cylindrical portion 2 of the front fork 1.
And the center angle is wider than 180 degrees, the cylindrical portion 2 of the front fork 1 is inserted between the two locking pieces, and the stopper member 14 is clawed. The locking means 15 is locked to the claw portion 3 of the front fork 1 by moving the locking member 15 to the side of the front fork 1.
By inserting the locking piece into the cylindrical portion 3 of the front fork 1, the locking piece can be locked to the claw 3 of the front fork 1 of any vehicle type, and the nut 13 is loosened. Even in this case, since the front axle 8 is supported by the falling-off preventing member 14 locked to the claw portion 3 of the front fork 1, the front wheels can be prevented from falling off.

Since the falling-off preventing member 14 is formed of an elastic resin such as polyacetal resin or polypropylene resin, the falling-off preventing member 14 has an arc shape having a diameter substantially equal to the diameter of the cylindrical portion of the front fork and having a central angle larger than 180 degrees. It is possible to easily form a falling-off prevention member having an elastic locking piece.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a device for preventing a front wheel from falling off according to a first embodiment of the present invention;

FIG. 2 is an exploded perspective view of a front wheel attachment portion provided with the bicycle front wheel drop-off prevention device.

FIG. 3 is a perspective view of a fall prevention member of the bicycle front wheel fall prevention device.

FIG. 4 is a perspective view of a fall prevention member of the bicycle front wheel fall prevention device according to the second embodiment of the present invention.

FIG. 5 is an exploded perspective view of a front wheel attaching portion provided with the bicycle front wheel drop-off prevention device.

FIG. 6 is a perspective view of a main portion of a conventional bicycle front wheel drop-off prevention device.

FIG. 7 is an exploded perspective view of a front wheel attaching portion provided with the bicycle front wheel drop-off prevention device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front fork 2 Cylindrical part 3 Claw part 8 Front axle 13 Nut 14 Captive washer (captive prevention member) 15 Locking claw (locking means) 16 Insert hole

Claims (3)

(57) [Claims] 1. A drop-off preventing member (14) having a locking means (15) for locking to a claw (3) of a front fork (1), and an insertion hole (16) for inserting a front axle (8). A front axle (8) is inserted into the insertion hole (16), and is fastened by a nut (13) via the claw (3) of the front fork (1) and the drop-off preventing member (14). The locking means (15) is composed of two locking pieces having an interval smaller than the width of the claw (3) of the front fork (1), The two locking pieces have a diameter substantially equal to the diameter of the cylindrical portion (2) of the front fork (1), and have a central angle of 1
It is an arc shape wider than 80 degrees, and the cylindrical portion (2) of the front fork (1) is inserted between the two locking pieces, and the falling-off preventing member (14) is placed on the claw portion (3) side. A device for preventing falling of a front wheel for a bicycle, which is moved to lock the locking means (15) to the claw (3) of the front fork (1). 2. The fall prevention device for a front wheel for a bicycle according to claim 1, wherein the locking piece is formed of an elastic resin. 3. A bicycle provided with the device for preventing a front wheel from falling off according to claim 1.