JPH0623884U - Bicycle front gear cover - Google Patents

Abstract

(57) [Summary] [Structure] An annular side cover 11 of a required width located on the outer surface of the gear portion of the outer front gear 3, and a side cover 11
The cover main body 1 is formed from the front cover 12 formed by bending the outer edge of the front portion inward from the upper part of the above, and the mounting piece 13 having the screw hole formed in the rear portion of the side cover 11. The front cover 1 includes a stay 2 in which a stopper 27 formed of a band and a screw shaft is attached to the plate surface inside the front portion of the cover body 1.
Attach both ends 21 to 2 by screwing. [Effect] The side cover and the front cover can cover the gear portion of the outer front gear, so that the shin or the like is not injured by the front gear when rolling over. Even if mud is splashed up by the front wheels, the front gear will not be covered with mud. The stay can be easily attached to the frame side using a band stop.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a front gear cover for a sports bicycle such as a mountain bike.

[0002]

[Prior art]

 Some bicycles of this type have a circular cover attached to the outside of the front gear or to the receiving member of the gear crank.However, in mountain bikes in which the front gear is composed of multiple shift gears, Most are uncovered because of the derailleur above.

[0003]

[Problems to be solved by the device]

 For this reason, the front gear may hurt the shin or the like when it rolls over, and even if it has a cover, its cover covers the side surface of the gear and the front and top surfaces are not covered. There is a problem that the meshing part of the chain with the chain easily receives the mud that the front wheel jumps up, so that it takes time to clean after use.

The present invention has been conceived in order to solve such a conventional problem, and its purpose is to be lightweight and easy to attach to a bicycle frame, and also to cover the front surface and the upper surface of a front gear. It is to provide a new bicycle front gear cover that can.

[0005]

[Means for Solving the Problems]

 The features of the present invention for the above-mentioned object are: an annular side cover of a required width located on the outer surface of the gear part of the front gear; and a front cover formed by bending the outer edge of the front part inward from the upper part of the side cover. , A cover body is formed from a mounting piece having a screw hole formed in the rear portion of the side cover, and a stay with a band stopper attached to the plate surface is attached to the front cover inside the front portion of the cover body. Both ends are fixed by screwing.

[0006]

[Work]

 In the above configuration, the side cover of the cover body attached to the lower pipe of the bicycle frame by the stay covers the gear portion of the outer front gear from the side surface, and the front cover covers the front portion from the upper portion of the front gear. .

[0007]

【Example】

 In the figure, 1 is a cover main body, 2 is a stay inside the front part of the cover main body 1, and they are made by press forming a steel plate. An outer front gear 3 has a plurality of speed change gears on the inner side thereof, and a derailleur 4 is located on the upper rear side thereof.

The cover body 1 is mainly composed of an annular side cover 11 having a required width. The front side of the side cover 11 is projected outward from the upper portion of the side cover 11 to form a wide portion, and the wide portion is bent inward. The front cover 12 is formed by a front cover 12 and a side cover 11, and a mounting piece 13 is formed at the center of the rear portion of the side cover 11. The lower part of the mounting piece 13 and the upper and lower ends of the front cover 12 are not shown in the drawing but are for mounting. The screw holes are drilled.

The side cover 11 is slightly larger in diameter than the outermost front gear 3 and has an outer diameter located on the outer side surface of the gear portion 3 a. The front cover 12 and the mounting piece 13 are included in the side cover 11. The inner and outer edges are slightly bent inward.

The stay 2 is a vertically long plate body whose upper part is bent to one side and two upper and lower parts of the plate surface are bent inward. Both ends 21 and 21 are further bent inward. It can be attached to the back side of the front cover 12 by a screw screw 22.

Further, at the center of the plate surface below the laterally bent portion of the stay 2, a stopper receiver 24 having a pair of insertion holes 23 cut in the upper and lower edges is formed by partially punching out the plate body. A well-known metal band 25 and a screw shaft 26 and a stopper 27 are attached to the stopper receiver 24 by inserting the metal band 25 into the insertion hole 23.

To attach the cover body 1 to the bicycle, the stay 2 is fixed to the lower pipe 31 of the frame by the fastener 27, and the attachment piece 13 is screwed to the metal fitting 33 attached to the chain stay 32 of the bicycle. It can be easily done by stopping.

The stay 2 is attached to the lower pipe 31 by removing it from the cover body 1. With the stay 2 on the front gear side, loosely band the stopper 27 on the lower pipe 31, and then lower it along the lower pipe 31. The stay 2 will be placed between the bicycle frame and the inner front gear 3n. Fits in.

After that, the cover body 1 is inserted through the gear crank 36 to which the pedal 35 is attached up to the side surface of the outer front gear 3, and the front cover 12 is fitted to the bent ends 21 and 21 of the stay 2 which project vertically. After the adjustment, it is fixed to the stay 2 with a screw screw 22. The attachment piece 13 is attached to the chain stay 32 after this, and finally the stopper 27 is tightened to securely fix the stay 2.

It should be noted that the mounting holes formed in the front cover 12 and the mounting piece 13 are preferably elongated holes from the viewpoints of space adjustment, position adjustment, and the like.

[0016]

[Effect of device]

 As described above, this invention covers the gear portion 31 of the outer front gear 3 from the side by the annular side cover 11, and the front cover 12 from the upper portion to the front portion of the front gear 3 together with the chain meshed therewith. Since it can be covered, the shin etc. will not hit the front gear when it rolls over, and even if mud etc. is scratched up by the front wheels, it will be blocked by the front cover and the front gear will be covered with mud. Since it is not used, cleaning after use is easy.

[0017] Furthermore, since it is mainly composed of an annular side cover, it is lightweight, and the cover is not conspicuous from the outside, so the image as a sports car such as a mountain bike is not impaired, and the installation is done without a derailleur and as a frame. It's easy because you only have to stop it at two points on the chain stay, and it will not come off due to vibration. Furthermore, since the stay can be attached to the frame side by using the band stopper, the installation is less complicated than when all are attached by using screw screws, and it can be easily removed without using a special tool when necessary. It has features such as being able to.

[Brief description of drawings]

1 is an inner perspective view of a front gear cover of a bicycle according to the present invention.

FIG. 2 is a front view of a main part in a state of being attached to a bicycle.

FIG. 3 is a front view of a main part of the bicycle, which is indicated by a chain line.

FIG. 4 is a rear view of the main part when it is attached to a bicycle.

[Explanation of symbols] 1 cover body 2 stay 3 outer front gear 3a gear part 3n inner front gear 11 side cover 12 front cover 13 mounting plate 21 both ends 23 insertion hole 24 stopper receiving 25 metal band 26 screw shaft 27 band Stopper 31 Lower pipe 32 Chain stay 33 Stopper

Claims (1)

[Scope of utility model registration request] 1. A front side cover having an annular side cover of a required width located on an outer side surface of a gear part of a front gear, and a front cover formed by bending an outer edge of a front part from an upper portion of the side cover inward.
A cover body is formed from a mounting piece having a screw hole formed at the rear portion of the side cover, and a stay having a band stopper attached to the plate surface is provided inside the front portion of the cover body. A bicycle front gear cover characterized by being attached by screwing.