JPH0528792U - Belt case mounting device for bicycles - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a bicycle chain case mounting device that integrally covers even a small gear of a free wheel and does not require many steps for belt replacement. [Structure] When the projection 6 extending upward from the rear claw 4 and the rear portion of the right-side back fork 3 are screwed together, an upright portion 21 sandwiched between the two and an inward facing portion formed above this. Belt case mounting bracket 20 including flat surface portion 22
Together with a screw so that the flat portion 22 of the mounting bracket is screwed to the upper bottom portion of the belt case 40, and channel-shaped flanges are formed on both sides of the upright portion 21. Drop it from above and fit it together, and tighten the screws together. [Effect] Since the belt case can be attached independently of the back hoe and can be extended to the rear, it is sufficient to cover the small gear, and the fixing of the mounting bracket to the protrusion can be performed easily and reliably. Replacing the belt is easy by loosening some screws.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting device for mounting the rear portion of a bicycle belt case on a bicycle body.

[0002]

[Prior Art]

 Conventionally, generally used bicycle belts are usually covered with a belt case, but whether a full-face case that covers the upper and lower running zones of the belt is used, Alternatively, a half case type belt case (so-called pistol type belt case) may be adopted in which the rear end does not reach the free wheel of the rear wheel and only covers the upper running belt of the belt.

In this latter case, it is convenient if some small gears of the free wheel can be covered. For this purpose, a mounting bracket for a full-scale case is prepared, or an actual opening 53 As disclosed in Japanese Patent No. 88956, there is a method of providing a separate auxiliary case at the rear portion.

[0004]

[Problems to be solved by the device]

 FIG. 6 is a side view of a bicycle having a conventional half-case type case attached thereto, and FIG. 7 is a perspective view of its main part. In the figure, 1 is a vertical pipe, 2 is a chain stay, 3 is a back hawk, and the chain sute-2 is welded to a protrusion 5 formed integrally with the rear claw 4 so that the back hawk 3 has a protrusion 6. They are fixed by screws 7 to each.

As shown here, the half-case type belt case 8 that covers only the upper traveling band of the belt is attached by attaching the rear end to the back fork 3 and holding the band 9 and the screw 10. The method of fixing was adopted. For this reason, the case 8 itself cannot be extended to the rear thereof, and therefore, in order to cover a part of the small gear 12 of the free wheel 11, as described above, the entire case is formed. The mounting bracket for the case or the sub-case is to be separately mounted. In these cases, since parts separate from the case are attached, the number of parts is increased, the structure is complicated, the manufacturing cost is high, and the assembly work is not easy. there were.

As another problem, when the endless belt is reattached, the screw 10 is loosened, the band 9 is released, the belt case 8 is removed from the right backhoe 3, and then the backhoe fixing screw is used. 7 is loosened, the rear part of the right back hawk 3 is removed from the protruding part 6 of the rear claw 4, and a belt (not shown) is inserted through the gap, which is very troublesome. .. As an alternative method, when loosening only the screw 7 from the nut (not shown) to remove the back hawk 3 from the protrusion 6 and inserting it from the gap, the back hawk 3 and the right back hawk 3 are integrated. As a result, the belt case 8 that has been fixed may be bent. 13 is a rear wheel hub axle.

The present invention has improved the above-mentioned drawbacks of the prior art, and in a bicycle adopting a half-case type belt case, even a small gear of a free wheel is integrally covered, It is an object of the present invention to provide a belt belt case mounting device for a bicycle, which does not require much labor when changing belts.

[0008]

[Means for Solving the Problems]

 The present invention adopts the following configuration in order to achieve the above object. That is, the gist of the present invention is that, when the projection portion extending above the rear claw portion and the rear portion of the right-side back fork are screwed, the elevation portion sandwiched between the both and the inward direction formed above this are provided. The belt case mounting bracket consisting of the flat surface of the belt case is tightened together with a screw so that the flat surface of the mounting bracket is screwed to the upper bottom of the belt case. And a belt case mounting member having channel-shaped flanges formed on both sides of the vertical surface, which is fitted onto the screw by dropping it from above the protruding portion. It is a mounting device that is tightened together.

Particularly, the belt case to be used is a half-case type belt case, and the rear part thereof is extended to cover a part of the small gear of the free wheel. According to another aspect of the invention, there is provided a bicycle belt case mounting device, characterized in that the flat portion of the mounting bracket is screwed to the upper bottom portion of the belt case.

[0010]

[Action]

 According to the present invention, the semi-case type belt case is not attached to the backhoe but is attached to a mounting metal which is completely independent of the backhoe. Therefore, the rear end of the belt case is attached to the backhoe. -It is possible to extend a part to the rear of the freewheel small gear without stopping it with a click, so that the number of parts is reduced and the structure is simple, but it can be mounted. This makes the work easier. Furthermore, even when the belt is replaced, many screws are loosened by the conventional mounting method, but this invention also simplifies the work.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are a side view, a front view and a top view of a belt case mounting member 20 which is a main part of the present invention. In the figure, reference numeral 21 is an elevation portion, which is sandwiched between the protrusion 6 and the rear portion of the back fork 3. Reference numeral 22 denotes a flat surface portion formed inwardly on the upper portion of the upright surface portion 21. In this example, the flat surface portion 22 is formed via an L-shaped angle 23. Channel-shaped flanges 24 and 25 are formed on both sides of the upright portion 21. The upright portion 21 has a shape similar to that of the protrusion 6 described later, and the flanges 24 and 25 have the lower side so that the protrusion 6 can be held from both sides and can be dropped from above. It is provided in an open state.

All of these are formed by bending. A free hole 26 is formed in the upright surface portion 21, while a screw hole 27 is formed in the flat surface portion 22.

FIG. 4 is a partially cutaway perspective view in which the belt case 20 is attached, and FIG. 5 is an exploded perspective view thereof. The projection 6 formed on the rear claw 4 is formed in a mountain shape obliquely upward, and a play hole 28 is formed at this end, and the play hole 26 of the belt case mounting member 20 is used to make a back hose. The same three holes are formed in the rear portion of the hook 3 and the three members are fastened together with the screw 30 and the nut 31.

At this time, the positional relationship with the protrusion 6 is specified by the flanges 24 and 25 provided on both sides of the upright portion 21 of the belt case mounting member 20 with respect to the protrusion 6.

The belt case 40 is a case having a U-shaped cross section and having an upper bottom 41. The case is extended rearward so that the upper part of a small gear (not shown) can be covered. A curved portion 42 is formed. A long hole 43 is formed in the upper bottom 41 of the case 40 in the longitudinal direction thereof. Then, the flat surface portion 22 of the belt case mounting member 20 is fitted into the upper bottom 41, and the screw hole 27 of the flat surface portion 22 and the long hole 43 of the upper bottom portion 41 are aligned with each other and fixed with the screw 44. is there. In this case, one side of the belt case 40 fits into the L-shaped bent portion of the belt case mounting bracket 20.

[0016]

[Effect of the device]

 The feature of the present invention is that the mounting of the belt case is independent of the back fork, and the belt case can be extended to the rear, so that the belt case is sufficient to cover the small gear. Moreover, with this mounting bracket, the fixing to the protrusion is simple and reliable. On the other hand, even when replacing the belt, it is sufficient to loosen some screws, and the workability is easy.

[Brief description of drawings]

FIG. 1 is a side view of a belt case mounting bracket of the present invention.

FIG. 2 is a front view of the belt case mounting bracket in FIG.

FIG. 3 is a front view of the belt case mounting bracket in FIG.

FIG. 4 is a partially cutaway perspective view showing a state where the belt case of FIG. 1 is attached.

FIG. 5 is an exploded perspective view of FIG.

FIG. 6 is a side view of a bicycle having a conventional half-case type belt case attached thereto.

FIG. 7 is a perspective view of a main part of FIG.

[Explanation of symbols]

 20 ... Belt case mounting bracket, 21 ... Mounting bracket vertical surface, 22 ... Mounting bracket flat surface area, 23 ... Mounting bracket L-shaped angle, 24, 25 ... Vertical surface flange, 26 , 28, 29 ... Play hole, 27 ... Screw hole, 30, 44 ... Screw, 31 ... Nut, 40 ... Belt case, 41 ... Top of belt case, 42 ... Belt case Curved part, 43 ... Long hole in the upper bottom.

Claims (3)

[Scope of utility model registration request] 1. When a projection extending upward from a rear claw and a rear portion of a right side backhook are screwed together, an upright portion sandwiched between the two and an inward flat portion formed above the elevation portion. A belt case mounting device for a bicycle, characterized in that the belt case mounting bracket consisting of and is fastened together with a screw so that the flat part of the mounting bracket is screwed to the upper bottom of the belt case. . 2. A belt case mounting member in which channel-shaped flanges are formed on both sides of an upright portion, which are fitted together by being dropped from above the protruding portion and also fastened together with screws. The belt case attaching device for a bicycle according to item 1. 3. The belt case is a half-case type belt case, the rear part of which is extended and a small gear of a free wheel is formed.
2. The bicycle belt case mounting device according to claim 1, wherein a part of the cover is covered.