JPS6241916B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed change operation device mainly used for bicycles, and more particularly, to a fixed member via a lever shaft, an operation lever having an operation wire fixed thereto is rotatably supported. The present invention relates to a speed change operation device that transmits rotational movement to a derailleur via the wire and switches to a predetermined speed position.

Conventionally, this type of speed change operating device has a plurality of concave engaging portions between an operating lever and a fixed member that supports the lever, and a locking body such as a ball that engages with one of the engaging portions. and a spring that presses the locking body against the engaging portion,
It is known that a gear shift position is determined by engagement of the locking body with the engaging portion, and at the same time, the lever is stopped at a position corresponding to the gear shift position.

However, when using the positioning mechanism as described above,
Although it is possible to accurately position the operating lever and perform accurate gear shifting operations, if the operating wire stretches due to repeated gear shifting operations, the movement of the movable parts in the derailleur will be distorted, making it difficult to accurately operate the operating lever. This means that you will not be able to perform proper gear shifting operations.

Conventionally, when using an outer tube for guiding the operating wire, the fixing member in the derailleur has a bowl-shaped receiving part at one end that receives the end of the outer tube, and a hollow adjusting member with a through hole in the center. A bolt is screwed on, and the amount of elongation is absorbed and corrected by rotating the bolt. Also, when using a so-called bare type wire that does not use an outer tube, the operating wire is connected to a movable member in the dayrailer. By rotating the fixing tool, the amount of elongation is absorbed and corrected.

However, in either case, since the absorption correction means is located on the derailleur side, there is a problem that the absorption correction means cannot be operated during gear shifting operation, and
There was also the problem that it was difficult to carry out the absorption correction operation.
Further, when fixing the tip of the operating wire, one end of which is locked to the operating lever, to the derailleur, the tip of the wire is strongly pulled to determine the relative effective length between the wire and the outer cylinder, and this state is maintained. Since it is necessary to fix the tip of the wire, there are problems in that not only is it difficult to assemble the operating wire, but also it is difficult to set the chain guide in the proper position.

The present invention was devised in view of the above-mentioned conventional problems.The purpose of the present invention is to absorb and correct the amount of elongation of the operating wire by operating the operating lever when assembling the operating wire. To provide a speed change operating device which can easily perform a straightening operation, facilitate assembly work, and can easily correct the elongation even when the wire is stretched.

Accordingly, the present invention provides a positioning member 6 that rotatably supports an operating lever 4, which locks one end of an operating wire W on a fixed member 1 via a lever shaft 2, and also positions the lever 4. of,
The positioning member 6 is supported on the fixed member 1 so as to be rotatable in the same direction as the rotation direction of the lever 4.
A positioning mechanism 8 is provided between the positioning member 6 and the lever 4, and the positioning member 6 is driven by the rotation of the lever 4 via the positioning mechanism 8. , a clutch member 9 for preventing the positioning member 6 from being driven by the lever 4 is removably interposed therein.

Embodiments of the device of the present invention will be described below based on the drawings.

The illustrated gear shift operating device includes a fixed member 1 fixed to, for example, a top tube of a bicycle frame.
Operation lever 3 that operates the front derailleur
and an operating lever 4 for operating the rear derailleur are rotatably supported. However, since the respective operating levers 3 and 4 have basically the same structure, they are used to operate the front derailleur. A description of the operating lever 3 will be omitted.

Therefore, the fixing member 1 has a screw hole 2a in the center.
A cylindrical lever shaft 2 with a cylindrical shape is integrally provided, and the operating lever 4, which has one end of the operating wire W fixed thereto via a cylindrical sleeve 5, is rotatably supported on the lever shaft 2. A cylindrical positioning member 6 for positioning the lever 4 is formed separately from the fixing member 1, and the positioning member 6 is attached to the lever shaft 2 via a cylindrical non-rotatable cap 7. A positioning mechanism 8 is provided between the positioning member 6 and the lever 4, and the positioning member 6 is supported rotatably in the same direction as the rotation direction of the lever 4. A clutch member 9 that prevents movement of the positioning member 6 is disengaged within the boss portion 4a of the lever 4 and between the positioning member 6 and the cap 7. I intervened.

In the above structure, the fixing member 1 has a mounting hole 1a in its center, and has the lever shaft 2 protruding from its side surface in a direction perpendicular to the axis of the mounting hole 1a. The fixing member 1 is fixed by fixing means consisting of a mounting screw 10 inserted into the mounting hole 1a and a threaded tube 50 directly attached to the bicycle frame by welding.
Note that the fixing member 1 may be fixed using fixing means such as a tightening band. Moreover, the lever shaft 2
A circular shaft portion 2b and a non-circular shaft portion 2c are provided on the outer peripheral surface of the sleeve 5.
is rotatably supported, and the non-circular shaft portion 2c has a
The cap 7 is supported non-rotatably. still,
The lever shaft 2 is formed separately from the fixing member 1,
It may be non-rotatably attached to the fixed member 1.

Further, the operating lever 4 has a shaft hole 41 provided at the center of the boss portion 4a that is rotatably fitted into the sleeve 5, and as shown in FIG. A locking groove 42 is provided on one side of the outer peripheral surface of the sleeve 5, and an engaging protrusion 5a that engages with the locking groove 42 is provided on the other side.
The length in the circumferential direction is made shorter than the locking groove 42, so that the lever 4 can freely rotate relative to the sleeve 5 by the difference in length between the locking groove 42 and the engaging protrusion 5a, and this free rotation When the position exceeds this point, the engagement protrusion 5a engages with the locking groove 42, thereby causing the operation lever 4 to rotate integrally with the sleeve 5. Note that the difference in length is the length equivalent to overshift. Further, a bore part 43 for receiving the positioning member 6 is provided on one side of the boss part 4a and is continuous with the shaft hole 41, and a recessed part 44 is provided on the inner circumferential surface of this bore part 43. The positioning mechanism 8 is provided between the positioning member 44 and the outer peripheral surface of the positioning member 6. A washer 51 and an elastic plate 52 made of a disc spring are interposed between the sleeve 5 and the cap 7, and a tightening screw 53 inserted into the cap 7 through a washer is inserted into the lever shaft 2. By screwing into the hole 2a, a predetermined rotational resistance is applied to the sleeve 5 and, by extension, the lever 4.

The positioning member 6 is formed into a cylindrical shape with an annular flange at one end as shown in FIG. 4, and is rotatably fitted to the outer circumference of the cap 7. A large number of first concavo-convex strips 61 are arranged in rows at minute pitch intervals, and a plurality of engaging portions 81 constituting the positioning mechanism 8 are provided on the outer peripheral surface. Note that the positioning member 6 may have a structure in which it is supported by the lever shaft 2 or the fixed member 1.

Further, the positioning mechanism 8 is made up of a plurality of engaging parts 81 and a locking body 82 that engages with one of the engaging parts 81, as shown in FIG. The locking body 82 is provided on the outer peripheral surface of the member 6 in accordance with the amount of movement corresponding to the gear position.
is supported via a spring 83 in a recessed part 44 provided in the inner cavity 43 of the lever 4, and at the same time, the gear position is determined by the engagement of this locking body 82 with the engaging part 81. The lever 4 is stopped at a position corresponding to the gear position. Note that the arrangement position of the engaging portion 81 and the locking body 82 is not particularly limited as long as it is between the positioning member 6 and the operating lever 4. 6, the engaging portion 81 may be provided on the operating lever 4. Moreover, the locking body 82 is
In addition to being supported via the spring 83, the locking body 82
The locking body 82 may be formed of an elastic plate, or a portion of the locking body 82 may be made elastic, or the locking body 82 may be formed of a rolling element such as a ball or a roll.

As shown in FIGS. 3 and 4, the clutch member 9 is an elongated member having a second concavo-convex strip 91 that engages with the first concave-convex strip 61 of the positioning member 6, and an operating portion 92 for a knob. Because it forms
A fitting groove 71 is provided on the outer peripheral surface of the cap 7 and the surface facing the first uneven strip 61, and the clutch member 9 is inserted into the fitting groove 71, and the cap of the clutch member 9 is inserted into the fitting groove 71. 7 in the rotational direction of the lever, and the second uneven strip 91
is engaged with the first uneven strip 61, and the lever rotation direction of the positioning member 6, and thus the wire W
movement in the operating direction, and also pulls out the clutch member 9 from the fitting groove 71 and inserts the second uneven strip 9
By releasing the engagement with the first concavo-convex strip 61 of the positioning member 6, the positioning member 6 can be rotated together with the operating lever 4 in the same direction as the rotational direction of the lever 4. This rotation of the positioning member 6 is performed by the rotation operation of the operating lever 4, and the operating force is transmitted to the positioning member 6 via the positioning mechanism 8. Further, the clutch member 9 is provided with a stepped portion 93 in the middle in the longitudinal direction thereof, which contacts the end surface 7a of the cap 7 to regulate the amount of engagement of the clutch member 9 with the fitting groove 71. In addition, a guide piece 94 is provided on the end surface of the clutch member 9 opposite to the operating portion 92, and comes into contact with the bottom surface of the fitting groove 71.
The contact area of the clutch member 9 with the fitting groove 71 is reduced to reduce the frictional resistance when the clutch member 9 is engaged or disengaged. Note that the clutch member 9
is not limited to the structure explained above,
In short, any structure may be used as long as the movement of the positioning member 6 can be controlled by engaging and disengaging operations.

The speed change operating device configured as described above is used with a derailleur, and the tip of the operating wire W, whose one end is locked to the operating lever 4, is fixed to the movable side member of the derailleur, and the turning operation force of the operating lever 4 is is transmitted to the movable side member of the derailleur via the operating wire W, and the movable side member is operated to shift to a predetermined gear position.

When connecting the operating lever 4 with the movable member of the derailleur, for example, the operating lever 4 is rotated in the wire pulling direction, and the locking body 82 of the positioning mechanism 8 is connected.
is engaged with the low-speed engagement portion 81a, and with the chain guide of the derailleur disposed near the multi-stage rear chain gear of the bicycle set in the high-speed position, the clutch member 9 is disengaged and the positioning member 6 is disengaged. Next, the tip of the operating wire W, which has one end locked to the operating lever 4, is pulled lightly to fix the tip to the movable side member of the derailleur, and in this state, the operating lever 4 is rotated in the wire pulling direction,
With the chain guide tool moved to a position corresponding to the low-speed chain gear, the operation of the lever 4 is stopped, and the relative effective length of the wire W and the outer cylinder that guides the wire W is determined; In this state, the clutch member 9 is engaged and the positioning member 6 is fixed to the fixing member 1.

Therefore, according to the present invention, the wire W can be easily fixed to the derailleur, and the chain guide of the derailleur can be set at an appropriate position.

Normally, the clutch member 9 is in the engaged position and the first and second concavo-convex strips 61 and 91 are engaged, so that the positioning member 6 is rotated in the same direction as the rotation direction of the lever 4. Instead, only the operating lever 4 rotates within a rotation angle range corresponding to the number of gears. By repeating this gear shifting operation,
When the wire W is stretched, the clutch member 9 is engaged and disengaged, and the first and second uneven strips 61,
91 is disengaged, the rotation of the positioning member 6 is released from being prevented by the clutch member 9, and the rotational force of the operating lever 4 is transmitted to the positioning member 6 via the positioning mechanism 8, and the operating lever is The amount of elongation is absorbed and corrected by rotating the positioning member 6 in the same direction as the rotation direction of the lever 4 using the rotation operation force of the lever 4. Then, in the absorbed and corrected state, the clutch member 9 is engaged to prevent the positioning member 6 from rotating.

Note that the speed change operating device shown in the drawings has a width in the circumferential direction of the locking groove 42 provided in one of the shaft hole 41 of the operating lever 4 and the sleeve 5. A gap _d1 is formed between the locking groove 42 and the engagement protrusion 5a, which is larger than the width of the protrusion 5a, and this gap _d1 allows the operating lever 4 to rotate freely relative to the sleeve 5. ing.

Therefore, the operation lever 4 allows the wire W to be
Even if the lever 4 is overshifted when the towing operation is performed, the lever 4 can be rotated back by a certain amount relative to the amount of towing when the operating force is released.

This return rotation amount is such that during a gear change operation, the chain shifts to one side in the thickness direction of the replaced large-diameter chain gear and contacts the adjacent chain gear, and then returns to the center side in the thickness direction of the replaced chain gear. The amount of movement required for this purpose, ie, the amount of overshift, is set to be approximately the same.

Further, the width in the circumferential direction of the recessed part 44 provided in the inner cavity 43 of the operating lever 4 is made larger than the locking body 82 held in the recessed part 44, so that the width between the recessed part 44 and the locking body 82 is increased. A gap d ₂ is formed between the two, and this gap d ₂ allows the operating lever 4 to rotate freely relative to the locking body 82 .

Therefore, the operating wire W when operating the operating lever 4 in the pulling direction or loosening direction of the operating wire W
It is possible to absorb the difference in the relative effective length between the wire and the outer tube that guides the wire, and when the gap d ₁ is provided between the locking groove 42 and the engagement protrusion 5a as described above, After the operating lever 4 is rotated in the wire pulling direction, it is rotated back by the amount of rotation set by the gap _d1 , but at this time, the returning operation of the lever 4 is caused by the locking body of the positioning mechanism 8
2, the positional relationship between the locking body 82 and the engaging portion 81 remains unchanged. Further, when the operating lever 4 is rotated in the wire loosening direction, only the operating lever 4 is rotated back within the range of the distance _d2 , and the locking body 82 does not operate. Therefore, by rotating the operating lever 4 back in the direction of the wire loosening by the rotation amount set by the gap d ₂ and further rotating the lever 4 back in the direction of the wire loosening, the chain can be moved from the large diameter chain gear to the small diameter chain gear. After this change is made, when the lever 4 is rotated in the direction of pulling the wire, the operation lever 4 is moved against the locking body 82 by the gap _d2. It is possible to freely rotate by the amount of rotation that you set.

Further, the speed change operation device constructed as described above is used together with the derailleur D shown in FIGS. 5 and 6, for example.

Next, this derailleur D will be explained.

What is shown in the drawing is a rear derailleur, and its basic structure is as shown in Figures 5 and 6.
A quadruple link mechanism A pivotally supported on the fixed member 11, that is,
Two link members 1 parallel to the base member 12
It is constituted by a quadruple link mechanism A consisting of four members: 3, 14 and a movable member 15, and the fixed member 11 is fixed to the fork end of the bicycle, and the quadruple link mechanism A The base member 12 has a horizontal axis 16 attached to the fixed member 11.
It is supported so that it can swing freely.

The base member 12 is provided with a pair of mounting pieces facing each other on one side, and the link members 13 and 14 are pivotally connected to these mounting pieces via a pair of pins 17 and 18. A pair of pins 19, 2 are attached to the free ends of the link members 13, 14.
0, the movable member 15 is pivotally mounted.

This movable member 15 has a similar shape to the base member 12, and has mounting pieces facing each other on one side thereof, and the two pins 19, 2 described above on this mounting piece.
0 is attached to the link members 13 and 14 so that they can swing together, and the horizontal shaft 16 is attached to the other side.
A chain guide 23 having a guide pulley (not shown) and a tension pulley is rotatably mounted within a certain range via a horizontal shaft 21 extending in the same direction as the link members 13 and 14. As a result, the movable member 15 moves parallel to the base member 12 between the high speed position and the low speed position shown in FIG.

The chain guide 23 attached to the movable member 15 includes the guide pulley and tension pulley 22, and a hanging frame 24 that rotatably supports these pulleys. 15, and is rotatably supported via a horizontal shaft 21. The rotation range of the hanging frame 24 is restricted by a stopper 25, and is biased clockwise in FIG. 5 by a tension spring 26 wound around the horizontal shaft 21. The tension spring 26 is for applying tension to the chain guided by the guide pulley and the tension pulley 22, and the force of the tension spring 26 causes the movable member 15 to move in the direction of the low speed position. You will be given the power to

Further, the quadruple link mechanism A configured as described above is provided with a return spring 27 to urge the chain guide 23 toward the small diameter chain gear.
A positioning mechanism 30 is provided which includes the same number of engaging parts 28 as the number of gear positions and a locking body 29 that engages with any one of the engaging parts 28.

However, in the embodiment shown in FIGS. 5 to 8, in the known derailleur constructed as described above, one link member 13 in the quadruple link mechanism A is
An operating arm 31 that swings independently of the quadruple link mechanism A is supported on the pin 17 which is pivotally supported on the base member 12, and one end of the operating wire W is fixed to the free end of the arm 31. At the same time, the return spring 27 is interposed between the operating arm 31 and the base member 12 of the four-link mechanism A, and one end of the spring 27 is connected to a stopper 31a that projects from the operating arm 31. , and the other end is brought into contact with a stopper 12a protruding from the base member 12, and the operating arm 31 is moved into the sixth and seventh positions.
The link member 1 is biased counterclockwise in the figure.
3 and 14 on the base member 12,
18, a positioning plate 33 having an engaging portion 28 of the positioning mechanism 30 and an arc-shaped guide hole 32 centered on the pin 17 is attached, and a storage plate 34 is attached to the pin 17 that supports the operating arm 31. The locking body 29 of the positioning mechanism 30 and the engagement pin 35 extending in the same direction as the pin 17 are supported on the energy accumulating plate 34, and the energy accumulating plate 34 and the engaging pin 35 extend in the same direction as the pin 17. An energy storage spring 36 is interposed between the link member 13 and the energy storage plate 34 to urge the energy storage plate 34 toward the link member 13.
is provided with a control hole 37 that receives the engagement pin 35 and allows the operating arm 31 to move only within a certain range with respect to the engagement pin 35.
is inserted, and the positioning mechanism 30 is operated after the operating arm 31 has moved within a certain range.

In the above configuration, the operation arm 31 is
One end of the pin 17 is extended outward and fixed to the extended end so that it can swing together with the pin 17, and one end of the operating wire W is attached to the free end of the operating arm 31 using a fixing device. fixed via 38;
By operating the operating wire W, the return spring 27
This is done by bending the operating arm 31 to swing it. Further, the control hole 37 provided in the operating arm 31 is formed as a circular hole having a larger diameter than the engaging pin 35, as shown in FIG. This is done so that the lever 4 is moved only in the same range as the free rotation range d. Note that the control hole 37
may be formed by an arc-shaped elongated hole centered on the pin 17, or may be formed by a concave notch.In short, the operating arm 31
It is only necessary to be able to move only within a certain range with respect to the engagement pin 35.

Further, the positioning plate 33 is connected to the quadruple link mechanism A.
, and its intermediate portion is connected to the pin 17,
18, and this positioning plate 33
One end is oriented toward the movable member 15 side, and the engaging portion 28 is provided on the inner surface of the end, and the other end is made to stand up, and the outer tube O that guides the wire W is supported on this upright part. It is supported via the fixture 39.

Furthermore, the energy accumulating plate 34 prevents the operation wire from moving even when the speed change resistance acting during the speed change operation is greater than the normal resistance, that is, the speed change resistance when the chain is moving, such as when the chain is not moving. W
, the quadruple link mechanism A is swung together with the operating arm 31 to switch to a desired gear position in advance, and when the large gear shift resistance is released, that is, when the chain starts to move, the storage Due to the restoring action of the force spring 36, the movable member 1
5 to the gear position set by the positioning mechanism 30, and in the case of normal gear shift resistance, the energy storage spring 36 swings integrally with the link member 13. Therefore,
The energy storage plate 34 is not necessarily required.

Further, a plurality of engaging portions 28 of the positioning mechanism 30 are provided at predetermined intervals along the rocking locus of the link members 13 and 14 that are displaced during gear shifting and according to the amount of movement of the link members 13 and 14. Also, the locking body 29 is formed of a rolling element,
The spring 40 biases the engaging portion 28 in the direction.

Incidentally, reference numeral 60 in the figure is an adjustment screw for adjusting the position of the chain guide tool 23 set by the positioning mechanism 30 with respect to the base member.

Next, the operation of the derailleur D constructed as above will be explained.

What is shown in FIG. 6 is a state in which the movable member 15 is at a high speed position, and when the operating wire W is pulled from this state by operating the operating lever 4, the operating lever 4 first moves due to the distance _d1 . As the derailleur D rotates freely within the set free rotation range, the return spring 27 that is in contact with one end of the operating arm 31 of the derailleur D is bent, and the operating arm 31 is rotated through the control hole 37 as shown in FIG. It swings within the set swing range, specifically within the same range as the free rotation range of the operating lever 4. Within the free rotation range of the operating lever 4 and the swinging range of the operating arm 31, the movable member 15 does not move, but the swinging of the operating arm 31 causes the return spring 27 to change its relationship with the link member 13. as a result of which the movable member 15 is cut off from the base member 12.
When the operating force of the operating lever 4 is released, the operating lever 4 can be moved freely toward the large-diameter chain gear side.
With the restoring force of 7, it is possible to return to the direction opposite to the pulling direction of the operating wire W.

Next, with the operating lever 4 rotated within the free rotation range, when the operating lever 4 is further rotated and the operating wire W is pulled, the end of the control hole 37 provided in the operating arm 31 is inserted into the engaging pin. 35, and thereafter, the device energy storage plate 3 is used for the swinging of the operating arm 31.
4 and the link members 13 and 14 follow, and this follow-up swing causes the movable member 15 to move toward the large-diameter chain gear and the positioning mechanism 30 to operate. And this positioning mechanism 30
The intermediate position where the locking body 29 crosses the boundary between two adjacent engaging parts 28 to the next adjacent engaging part side, that is, the chain guided by the chain guide 23 has the large diameter. When the pulling operation of the operating wire W is stopped at a position where the operating wire W contacts the chain gear but is not lifted, in the conventional derailleur, the locking body 29 of the positioning mechanism 30 does not accurately engage with the desired engagement portion 28. Instead, as shown in the imaginary line B in FIG.
The chain stops at a position beyond the side, and the chain remains in contact with the chain gear, and the contact of the chain with the chain gear causes noise, but in the configuration described above, the movable member 15 is in a free state. Therefore, at the above position,
Even if the operation of the operating wire W is stopped, the chain tension acting on the movable member 15 causes the movable member 15 to move within the swing range toward the sprocket to be replaced.
Therefore, the chain that contacts the large-diameter chain gear is caught on the teeth of the large-diameter chain gear, and is lifted up and reliably replaced with the chain gear. At this time, as shown by the solid line in FIG. 8, the locking body 29 of the positioning mechanism 30 also accurately engages with the desired engaging portion 28, and the chain guide 23 can be placed at the position set by the positioning mechanism 30. . or,
Depending on the amount of traction operation of the operating wire W, the chain may come into contact with the chain gear and be lifted, and be replaced by the chain gear. At this time, if the amount of traction operation is insufficient, the inner The link plate will come into contact with the replaced chain gear. Therefore, if the operation of the operating wire is stopped at this position, a noise will be generated, but in the configuration described above, the movable member 15 is moved by the tension acting on the movable member.
As in the case described above, in order to move within the swinging range, the chain guide 23 is moved by the positioning mechanism 30.
You can place it in the position you want.

Furthermore, when the operating wire W is towed to change gears, the operating wire W is pulled at a position where the locking body 29 of the positioning mechanism 30 crosses the valley of the desired engagement portion 28a toward the next engagement portion. When the towing operation is stopped and the operating force is released by removing the hand from the operating lever 4, in the conventional derailleur, the locking body 29 of the positioning mechanism 30 does not accurately engage with the desired engagement portion 28a. As shown in the imaginary line C in FIG. 8, it stops at an intermediate position between the valley of the desired engagement part 28a and the boundary on the next engagement part side, and the chain guided by the chain guide tool 23 adjoins the large diameter side. The control lever 4 remains in contact with the chain gear, and the contact of the chain with the chain gear causes noise, but in the configuration described above, the operating lever 4 can be rotated back within the range of the distance _d1 . Since the restoring force of the return spring 27 of the derailleur D causes the operating lever 4 to return rotate within the range of the distance _d1 , as a result, the movable member 15 is rotated by the restoring force of the return spring 27 of the derailleur D. According to
The locking body 29 of the positioning mechanism 30 moves back toward the small diameter chain gear within the return rotation range of the operating lever 4.
The chain guide 23 is accurately engaged with the desired engaging portion 28 as shown by the solid line in FIG.
It can be placed at the position set by 0.

As described above, in the present invention, the positioning member 6 for positioning the operating lever 4 is attached to the fixed member 1.
A positioning mechanism 8 is provided between the positioning member 6 and the lever 4 so as to be rotatable in the same direction as the rotation direction of the lever 4, and the positioning member 6 is rotated through the positioning mechanism 8. A clutch member 9 is removably interposed between the positioning member 6 and the fixed member 1 to prevent the positioning member 6 from being driven by the lever 4 while being driven by the rotation of the lever 4. When assembling the operating wire, the amount of elongation of the operating wire can be absorbed and corrected by operating the operating lever. Even if the operating wire is stretched, the amount of stretch can be absorbed and corrected by adjusting the posture during gear shifting operation, and in addition to engaging and disengaging the clutch member, the operator simply rotates the operating lever in the wire pulling direction. The amount of elongation can be easily corrected by absorption with extremely simple operations.

Furthermore, since the positioning member is rotatably supported with respect to the fixed member, when the tip of the operating wire, one end of which is locked to the operating lever, is fixed to the derailleur, it can be easily fixed, and the derailleur can be fixed easily. This allows the chain guide to be set in the proper position.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway vertical sectional view showing an embodiment of the device of the present invention, Fig. 2 is a sectional view taken along the line of Fig. 1, and Fig. 3
The figures are a cross-sectional view taken along the lines shown in Figure 1, Figure 4 is an exploded perspective view of the main parts, Figures 5 to 8 show examples of the derailleur, Figure 5 is a front view, and Figure 6 is its front view. A bottom view, FIG. 7 is an explanatory diagram when the operating arm is swung relative to the positioning mechanism by operating the operating lever, and FIG. 8 is an explanatory diagram showing the positional relationship between the engaging part of the positioning mechanism and the locking body. It is. DESCRIPTION OF SYMBOLS 1... Fixed member, 2... Lever shaft, 4... Operating lever, 6... Positioning member, 8... Positioning mechanism, 9... Clutch member, W... Operating wire.

Claims (1)

[Claims] 1. An operating lever 4, which is configured to lock one end of an operating wire W on a fixed member 1 via a lever shaft 2, is rotatably supported, and a positioning member 6 for positioning the lever 4 is attached to the fixed member. 1
The positioning member 6 and the lever 4 are supported rotatably in the same direction as the rotation direction of the lever 4.
A positioning mechanism 8 is provided between the positioning member 6 and the positioning member 6.
and a fixed member 1, a clutch member 9 is removably interposed to prevent the positioning member 6 from being driven by the lever 4.