JPS591906Y2 - Wire guide for rear derailleur on bicycle - Google Patents

Description

[Detailed description of the invention] The present invention is a wire guide for a rear derailleur of a bicycle. Specifically, the present invention is a wire guide for a rear derailleur of a bicycle, which is used together with a multi-stage sprocket attached to the rear wheel hub of a bicycle, and a rear derailleur that replaces the driving chain with one of the sprockets of the multi-stage sprocket.
This relates to a wire guide for the operating wire that operates the rear derailleur, and its purpose is to enable the derailleur to be operated using only the operating wire, in other words, without using an outer cable to guide the wire. The main point is to provide a wire guide that can be used as a wire guide.

In general, a rear derailleur has a pantograph mechanism consisting of four members: a mounting member, two link members, and a movable member with a chino guide. One end of an operating wire is fixed on one side, and one end of an outer cable that guides the wire is supported on the other side, and the movable member is reciprocated by the operation of the wire, and the driving chino is guided by the chino guide tool. I am trying to replace it with one sprocket.

By the way, when the outer cable is used, there is no need to tension the operating wire connected between the trailer and the operating lever, and therefore the wire can be routed freely along with the outer cable. On the other hand, when an outer cable is used, there is a problem that the outer cable protrudes to the side of the rear wheel of the bicycle, causing the feet to get caught.Also, using an outer cable reduces the efficiency of transmitting the operating force of the trailer by the operating lever. There was a problem that the outer cable would expand and contract as well as cause poor gear shifting.

Therefore, the present invention is a bicycle wire guide that enables the rear derailleur to be operated using only an operating wire without using the above-mentioned outer cable, and is composed of a mounting part and a guide part. A shaft hole is formed that can be inserted into the hub axle of a rear hub having a multi-stage sprocket, and one end side of the guide portion is radially outward of the hub axle and is located on the side of a rear derailleur provided corresponding to the multi-stage sprocket. It is characterized by being formed as if it were located at

An embodiment of the wire guide of the present invention will be described below based on FIGS. 1 and 2. The wire guide shown in FIGS. 1 and 2 consists of a mounting part 1 and a guide part 2. 3
The bicycle shown in the figure has a multi-stage sprocket)S,
A shaft hole 3 that can be inserted into the hub shaft H8 of the rear hub H is formed, and one end of the guide portion 2 is extended to the mounting portion 1 in a curved shape, and this extended end is formed at the radius of the hub shaft H3. It is arranged so as to be located outward in the direction and on the side of the rear derailleur D provided corresponding to the multi-stage sprocket as shown in FIG.

As shown in FIG. 3, the wire guide configured as described above has the mounting portion 1 inserted into the hub shaft H3 through the shaft hole 3, and the locking nut l which fixes the ball pusher P of the hub H.
It is used by fixing it by tightening the -R screw.

The guide portion 2 is formed by curling a plate extending from the mounting portion 1 into a pipe shape, and the outer diameter of the guide portion 2 is shorter than the axial length of the lock nut R. It is made so that it does not come into contact with the hawk end E which is inserted into the axially outward part of the lock nut R.

The wide guide of the present invention attached to the hub axle H5 as described above guides the operating wire W of the rear derailleur D attached to the fork end E together with the hub axle H5, as shown in FIG. Derailleur shown in the diagram
1 is a mounting part 11 consisting of a bracket 11a and a support member 11b that swings within a certain range with respect to the bracket 11a, two parallel link members 12, 12 supported by the support member 11b, and a chino guide. 13, the pantograph mechanism is moved into a groove by a movable member 14 with a movable member 13, and a fixing member 15 for the wire W is attached to one of the link members 12.12, that is, the link member 12 located axially outward with respect to the hub shaft H8. Once installed, the guide portion 2 is configured such that its tip is located on the side of the derailleur D configured as described above.

That is, the tip of the supporting member 11b is connected to the bracket 1.
1a, and located inward in the axial direction of the hub shaft H5 with respect to the position of the fixture 15.

Note that the trailer D shown in FIG. 4 is not provided with a return spring, and supports the tension member 18 on the link member 12.
The tip of this tension member 18 is engaged with the bracket 11a, and a tension spring 20 is wound around the pivot shaft 19 that supports the chino guide 13, and one end of the tension spring 20 is engaged with the movable member 14. The movable member 14 is urged in a counterclockwise direction, that is, in a direction approaching the bracket 11H, by the action of the tension spring 20.

In the above configuration, the wire W has one end thereof
The fixture 1 is fixed to the fixture 15, and the other end is fixed via the guide portion 2 to an operating lever attached to the handlebar of the bicycle or a frame near the handlebar, and the lever and the fixture 1
5, and the conventional outer tube is not used.

Therefore, when the wire W is pulled by operating the lever, the distance between the fixture 15 fixing one end of the wire W and the guide section 2 is shortened, the pantograph mechanism is deformed, and the movable member 14 and the chain guide tool 13 are displaced in the axial direction of the sprocket S.

At this time, the guide portion 2 is fixed to the hub shaft H3, and the tip thereof is located below the pivot shaft 16, so that the support member 11b is attached to the bracket l-112.
This swing causes the constituent pantograph mechanism to swing together with the support member 11b, thereby moving the chino guide 13 toward the sprocket S.
is displaced radially outward.

In the shift operation performed as described above, the chino guide 13 moves in the radial direction while moving in the axial direction with respect to the sprocket (S). In other words, the chino guide The chaino guided by the thirteen pulleys 13a and 13b can be easily and smoothly replaced with one of the sprockets S, and the tensile force of the wire W can be reduced accordingly.

Moreover, in the above operation, if the pedals of the bicycle are stopped and the chenno is not moving, the Boo IJ
- A large resistance will act on the axial movement of the support members 11 b and 13 a, but in this case, the pantograph mechanism is moved by the pulling operation of the wire W.
The pantograph mechanism is swung through the pivot shaft 16 to store the operating force of the wire W, and when the resistance is released, the pantograph mechanism is deformed by the stored force.

In the configuration described above, the pantograph mechanism includes:
It is possible to provide a return spring in the conventional manner.

In this case, the tension member 18 is removed, and the pantograph mechanism is installed between the support member 11b and the bracket 11a on the side of the bracket 11a, that is, the pulley 13a,
A spring is interposed so that the sprocket 13b is pressed in a direction toward the axis of the sprocket S.

As described above, in the present invention, since the operating wire for operating the rear derailleur can be guided by the guide portion, when the rear derailleur is used, the rear derailleur can be operated without using an outer cable for guiding the wire to the operating wire. Therefore, the problem with conventional products in which the derailleur was operated using an outer cable can be solved.

Moreover, the wire guide of the present invention can be installed by inserting it into the hub axle and using a lock nut that is screwed onto the hub axle, so there is no need for special installation means and the installation effort is reduced. Since the derailleur is fixed, as shown in the embodiment, the derailleur can be operated in a combination of axial and radial directions using the operating wire guided by the guide section.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the wide guide of the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Fig. 3 is a partially cutaway front view of the hub showing how it is attached to the hub axle. , 4th
The figure is a front view showing the wide guide of the present invention in use. 1... Mounting part, 2... Guide part, 3... Shaft hole.

Claims (1)

[Scope of utility model registration request] A bicycle wire guide comprising a mounting part and a guide part, the mounting part having a shaft hole that can be inserted into the hub shaft of a rear hub having a multi-stage sprocket for a bicycle, and one end side of the guide part. 1. A wire guide for a rear derailleur of a bicycle, characterized in that the wire guide is formed to be located radially outward of a hub shaft and to the side of a rear derailleur provided in correspondence with the multi-stage sprocket.