JP2942850B2 - Speed change device for bicycle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bicycle shift operation device provided on an appropriate portion of a bicycle frame or a handle for remotely controlling a bicycle rear derailleur or a bicycle front derailleur via a cable.

BACKGROUND ART In shifting a bicycle, a rear gear of the bicycle is configured as a multi-stage type in which a plurality of different-diameter sprockets are juxtaposed (such a multi-stage rear gear is referred to as a multi-stage freewheel). Is also constructed in a multi-stage system in which a plurality of different-diameter sprockets are arranged side by side (such a multi-stage front gear is referred to as a multi-stage chain wheel), and a chain is replaced by a selected sprocket in these multi-stage gears. .

A device that replaces the sprocket selected on the multi-stage freewheel with a chain is called a rear derailleur, and a device that replaces the sprocket selected on the multi-stage chain wheel with a chain is called a front derailleur. Generally, these derailleurs forcibly press the chain in a lateral direction against a part introduced into the multi-stage freewheel or the multi-stage chain wheel of the endless chain which is wound between the multi-stage freewheel and the multi-stage chain wheel during traveling. It is designed to be replaced with the desired sprocket. A member for pressing a part of the chain in this way is generally called a chain guide, and a rear derailleur is configured to include an upper guide pulley and a lower tension pulley, and a front derailleur is configured to sandwich the chain from both sides in the width direction. It comprises a pair of guide plates located.

The derailleur generally deforms the deformable parallelogram pantograph mechanism to translate the chain guide in the horizontal direction. The parallelogram pantograph mechanism is biased by a spring so as to always return the chain guide to the small diameter sprocket.

The operation of shifting the chain guide in the lateral direction by deforming the parallelogram pantograph mechanism by the derailleur, that is, the parallelogram pantograph mechanism, is performed via a cable by a gear shift operating device attached to a bicycle frame or a steering wheel. . Most commonly, the speed change operation device has a form of an operation lever that can be rotated, and the other end of a cable whose one end is connected to a derailleur is connected to this operation lever. The operation lever pulls the operation cable when rotated in one direction, and draws out the operation cable when rotated in the other direction. When the operation cable is pulled, the pantograph mechanism is deformed against the urging force of the spring in accordance with the amount of pulling, and when the operation cable is extended, the pantograph mechanism is operated by the return force of the spring in accordance with the amount of extension. Deform.

By the way, shifting by the derailleur, that is, changing the chain to the target sprocket of the multi-stage gear,
This is done only when the chain guide moves to the lateral position corresponding to the target sprocket. For example, referring to FIG. 8, in a multistage chain wheel CW having three sprockets, when changing over the chain hanging on the small sprocket S ₁ to the intermediate sprocket S ₂ is the chain guide and the small sprocket S ₁ It must be moved from a position corresponding to X ₁ to the position X ₂ corresponding to the intermediate sprocket S _2, when changing over to the large sprocket S _3, the position X ₃ to the corresponding chain guide in large sprocket S ₃ Must be moved up.

In other words, when the chain is replaced by the derailleur, the range in which the chain must be positioned in order to properly replace the chain with the target sprocket is limited.
Therefore, in order to allow anyone to easily perform an appropriate shift operation, various shift operation devices incorporating a positioning mechanism for stepwise locking the lever with a sense of moderation at each fixed rotation angle have been proposed. According to such a speed change operation device, if the lever is rotated to each stage locking position, the chain guide can be automatically guided to an appropriate position corresponding to the target sprocket.

By the way, in order to achieve a quicker and more reliable shift operation, a so-called overshift function is often added to the above-described shift operation lever with a built-in positioning mechanism. With this overshift function, when changing the chain from the sprocket with which the chain currently meshes to the target sprocket located on the large diameter side, the chain guide is moved more than the position corresponding to the target sprocket, The function is to return the chain guide to the corresponding position when the chain starts to mesh with the target sprocket. This makes it possible to eliminate the cause of a decrease in shift responsiveness due to the pressing position of the chain guide against the chain being far from the outer periphery of the sprocket when the chain is pressed to deflect the chain to change the chain. ,
Shift performance can be improved.

The above-described shift operation lever with a built-in positioning mechanism having an overshift function is configured, for example, in Japanese Patent Application Laid-Open No. 63-26995 as follows.

That is, in a basic configuration in which a ball held at a position relatively fixed to the lever axis is pressed against a positioning plate that rotates together with the lever body, the relative rotation of the lever axis between the positioning plate and the lever body is performed. Play movement is allowed. In the positioning plate,
A plurality of engagement holes are provided at predetermined angles corresponding to the number of shift steps, in which the balls are sequentially elastically engaged to perform a positioning operation when the balls rotate together with the lever body.

In the above configuration, when the lever main body is rotated in the cable pulling direction, the positioning plate also rotates together with the lever main body, and the ball is engaged with one of the engagement holes of the positioning plate before positioning is performed. . Then, since the lever body is constantly urged in the cable feeding direction by the return spring of the derailleur via the cable, if the hand is released from the lever body after the above-mentioned positioning operation, the lever body will play with the positioning plate. It rotates in the corresponding cable feeding direction. In this way, an overshift operation is performed in which the chain guide of the derailleur is once moved more than the position corresponding to the target sprocket, and then returned to the position corresponding to the target sprocket.

In the above conventional example, the overshift amount is set by the play of the positioning plate with respect to the lever body. Therefore, this overshift amount is always constant regardless of the gear position.

Incidentally, for example, referring to FIG. 8, in the shift in the chain wheel CW of 3-speed, thien from when the intermediate sprocket S ₂ to changing over the chain from the small sprocket S ₁ to the intermediate sprocket S ₂ to the large sprocket S ₃ In the case of changing over, ideally, it is better to change the overshift amount. That is, more from the smaller sprocket S ₁ overshift amount when changing over the chain to the intermediate sprocket S ₂ of the (X ₂ -X ₂ ') is an intermediate sprocket S ₂
Therefore, the overshift amount (X ₃ −X ₃ ′) when the chain is replaced with a large diameter sprocket S _{3 is set} to be larger.
This is because, over the general tendency, towards the pressing position by chain guide when changing over the chain from the small sprocket S ₁ to the intermediate sprocket S ₂ (L ₂₎ is the delay from the intermediate sprocket S ₂ to the large sprocket S ₃ This is because it tends to be farther from the outer periphery of the sprocket than the pressing position (L ₃ ) when changing the chain (L ₂ > L ₃ ), and it is necessary to deflect the chain more to achieve a quick chain change. .

Case shown in FIG. 8, assuming that the set of over-shift amount to the amount necessary to place over from smaller sprocket S ₁ to the intermediate sprocket S _2, the chain from the intermediate sprocket S ₂ to the large sprocket S ₃ over recombination In this case, the amount of overshift becomes too large, and the chain tends to drop out of the large-diameter sprocket. To avoid this,
It is necessary to take measures such as attaching a guide ring for preventing the chain from falling off outside the large-diameter sprocket, which increases the number of parts and the weight of the parts.

Also, if the overshift amount is set to the amount required for changing the chain from the intermediate sprocket to the large diameter sprocket, the overshift amount when changing the chain from the small diameter sprocket to the intermediate sprocket will be insufficient, and the shifting performance will be insufficient. Is reduced.

Since the amount of overshift is always constant, a similar problem occurs in the multi-stage freewheel FW as shown in FIG. That is, in general, the position of the chain guide (for example, L ₂ ) on the small diameter sprocket side is better than the position of the chain guide on the large diameter sprocket side (for example, L ₂ ).
Since L ₅₎ away from the sprocket than to greater than the over-shift amount when performing recombination times the over-shift amount in large sprocket side chain in the case of performing the recombinant multiply the chain with the small sprocket side is desirable. However, in the conventional example, since the overshift amount is constant,
It was difficult to obtain quick shifting performance on both the small diameter sprocket side and the large diameter sprocket side.

The present invention was conceived under the circumstances described above, and in a bicycle shift operating device incorporating a step positioning mechanism, it is possible to set an appropriate overshift amount at each shift speed. The challenge is to make it possible.

DISCLOSURE OF THE INVENTION A bicycle speed change operating device according to a first aspect of the present invention is provided with a support, a rotatable operation with respect to this support about an axis thereof, and an operation of pulling or extending one end of a cable. An operating body, an engaging body provided on one of the support and the operating body, and a positioning member provided on the other of the support and the operating body and having a plurality of engaging portions, A gear shifting operation device for a bicycle, wherein when the operating body is rotated, the engaging body sequentially elastically engages with a plurality of engaging portions of the positioning member to perform a positioning operation; , The plurality of engagement portions are divided into a plurality of groups, each of which is divided into a plurality of groups, and a first member is provided around the axis of the support with respect to a member provided with a positioning member. Corner It has become possible relative play movement, the second member following member, is characterized in that are to enable a predetermined angle relative play movement about the axis of the support relative to the first member.

The bicycle shift operating device according to the second aspect of the present invention is supported by a support and a rotatable operation about the support with respect to the support, and pulls or extends one end of the cable. Operating body, an engaging body provided on one of the support and the operating body, and a positioning member provided on the other of the support and the operating body and having a plurality of engaging portions. In the bicycle shift operating device, when the operating body is rotated, the engaging body is elastically engaged with the plurality of engaging portions of the positioning member to perform the positioning operation. The plurality of engagement portions are divided into a plurality of groups, each of which is divided into a plurality of groups, and a first member among the plurality of members is provided around an axis of the support with respect to a member provided with a positioning member. angle The first member and the second member and the following members are allowed to move relative to the member provided with the positioning member at an angle different from that of the first member around the axis of the support. It is characterized by:

A vehicle speed change operation device according to a first aspect of the present invention includes a positioning member having a plurality of engagement portions attached to one of a support and an operation body, and an engagement body attached to the other of the support and the operation body. The relative rotation about the axis of the support with the rotating operation of the operating body, and at this time, the engaging body sequentially elastically engages with the plurality of engaging portions to perform the positioning operation of the operating body. First, the first member of the positioning member is allowed to play relative to the member to which the first member is attached by a predetermined angle so as to provide a basic overshift amount for a gear corresponding to the engaging portion included in the first member. , The member below the second member is further allowed to play relative to the first member by a predetermined angle, and the above-mentioned basic overshift is performed for the gear corresponding to the engaging portion included by the member below the second member. The quantity of the first member and the second part It is obtained so as to provide greater overshift amount than plus additional over-shift amount corresponding to the play movement between.

Thus, it is possible to set the overshift amount as desired for each shift speed. Therefore, when a speed change device for changing the chain in a multi-stage chain wheel having three sprockets, a small diameter sprocket, an intermediate sprocket and a large diameter sprocket, for example, the positioning member is made up of the first and second members. If the first member includes the engaging portion corresponding to the large diameter sprocket and the second member includes the engaging portion corresponding to the intermediate sprocket, the first member includes the engaging portion corresponding to the intermediate sprocket. The amount of overshift can be made larger than the amount of overshift when a large diameter sprocket is replaced with a chain, so that the conventional problem can be solved and an appropriate amount of overshift can be set at each shift speed. .

In a preferred embodiment. The positioning member is attached to a lever shaft or handlebar as a support, and the engaging body is attached to the operating body.On the contrary, the positioning member is attached to the operating body, and the engaging body is used as a supporting body. May be attached to the lever shaft or handlebar of the vehicle. In short, if a relative movement around the lever axis occurs between the positioning member and the engaging body when rotating the operating body,
A positioning operation in which the engagement body sequentially engages with the engagement portion of the positioning member can be achieved.

In a preferred embodiment, the engaging member is rotatable relative to a lever shaft as the support member, and is provided in each holding hole of two holding plates that are not rotatable relative to the operating member. The positioning member is formed of two balls held respectively, and the first member is fitted in the first member so as to be rotatable relative to the lever shaft by a predetermined angle, and the positioning member is provided between the two holding plates. And the engaging portion is formed by a through hole provided in the plate-shaped positioning member. The ball is positioned between the two holding plates by a substantially U-shaped leaf spring mounted on the two holding plates so as to sandwich the two holding plates from both sides in the thickness direction. It is urged toward the shape positioning member. Further, the laminated body including the two holding plates and the plate-shaped positioning member located between the two holding plates is held by a spring clip.

According to this structure, the elasticity of pressing the two balls against the positioning member is offset each other, so that no unnecessary force acts on the positioning member, and the strength of the member is reduced to reduce the weight and size. As a result, the rotating operation of the operating body becomes smooth.

Further, a laminate comprising the two holding plates and the plate-shaped positioning member located therebetween, and the two balls held in the holding holes of the holding plate are formed by the spring clip and the U-shaped plate. Since the cassettes are assembled by the springs, the speed change operation device can be assembled by a simple method of, for example, inserting the operating body after inserting the cassette-shaped assembly onto the lever shaft.

A vehicle speed change operation device according to a second aspect of the present invention is a vehicle speed change operation device having the same basic configuration as that of the first aspect described above. The overshift amount corresponding to the engaging portion included in each of the divided members is different.

In this case, the same operation and effect as those according to the first aspect can be obtained.

Further, the vehicle speed change operation device of the present invention is in the form of a lever shaft attached to a frame as a support, and a boss portion is rotatably fitted on the lever shaft as an operation body, and the boss portion is In addition to being in the form of an operating lever having an arm portion extending in the radial direction, the supporting body may be in the form of a handlebar or a wrapped member fitted thereon, and the operating body may be turned around the handlebar. It is also possible to use a so-called grip-type speed change operation device in the form of an annular body movably fitted.

Other features and advantages of the present invention will become more apparent from the following detailed description, which proceeds with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a speed change operation device according to a first embodiment of the present invention.

 FIG. 2 is a view taken in the direction of arrow II in FIG.

FIG. 3 is a plan view showing the inside of the speed change operation device of FIG. 1 in an exposed manner.

 FIG. 4 is a sectional view taken along the line IV-IV in FIG.

 FIG. 5 is an explanatory view of a first member of a positioning member.

 FIG. 6 is an explanatory view of a second member of the positioning member.

FIG. 7 is a diagram for explaining the operation of the speed change operation device according to the first embodiment.

FIG. 8 is a diagram for explaining the operation of the speed change operation device according to the first embodiment.

FIG. 9 is a plan view showing the inside of a shift operation device according to a second embodiment of the present invention, with the inside thereof being exposed.

 FIG. 10 is a sectional view taken along line XX of FIG.

 FIG. 11 is an explanatory view of a first member of a positioning member.

 FIG. 12 is an explanatory diagram of a second member of the positioning member.

FIG. 13 is a diagram for explaining the operation of the speed change operation device according to the second embodiment.

FIG. 14 is a cross-sectional view showing a grip-type automotive shift operation device.

 FIG. 15 is a half sectional view of a main part taken along arrow V in FIG.

 FIG. 16 is a cross-sectional view of a main part taken along a line VI in FIG.

FIG. 17 is an exploded perspective view of the vehicle speed change operation device shown in FIG.

 FIG. 18a is a front view showing the operating body.

FIG. 18b is a half sectional view taken along line X5-X5 in FIG. 18a.

FIG. 19a and FIG. 19b are a plan view and a front view, respectively, showing a ring body.

 FIG. 19c is a sectional view taken along line X6-X6 in FIG. 19b.

20a and 20b are a front view and a right side view of the positioning plate, respectively.

 FIG. 21 is an enlarged sectional view of a main part taken along line X7-X7 of FIG.

 FIG. 22 is an enlarged sectional view of a main part taken along line X8-X8 in FIG.

FIG. 23 is a cross-sectional view showing an operation state of the vehicle speed change operation device shown in FIG.

24a to 24c are explanatory views showing the operation state of the positioning plate.

FIG. 25 is a sectional view showing a speed change operation device according to the third embodiment.

FIG. 26 is a main part half sectional view taken along the line VII of FIG. 25.

27a to 27c are explanatory views showing the operation state of the positioning plate.

FIG. 28 is a front view of a positioning plate, which is a main part of the shift operation device according to the fourth embodiment.

27a to 27c are explanatory views showing the operation state of the positioning plate.

BEST MODE FOR CARRYING OUT THE INVENTION FIGS. 1 to 7 show a shift operation device 1 for a vehicle according to a first embodiment of the present invention. The shift operation device 1 is an example configured to operate a front derailleur to perform a shift. Therefore, this speed change operation device is provided, for example, near the left grip of the huddle bar 2.

As described above, the front derailleur has a function of changing the chain to the selected sprocket of the multi-stage chain wheel, and is biased so that the chain guide returns to the normal small-diameter sprocket side. The other end of the cable W connected to one end of the front derailleur is connected to the operating body 3 of the shift operation device 1 for a vehicle. The operation body of the speed change operation device can pull or unwind the cable by rotating the operation body. Therefore, the operation body 3
Is rotated in the cable pulling direction (arrow P direction),
The cable W is pulled against the urging force, and the chain guide is moved toward the large-diameter sprocket according to the amount of pull. Conversely, when the operating body 3 is rotated in the cable repetition direction (the direction of arrow Q), the cable W is extended by the biasing force on the derailleur side,
The chain guide is moved toward the small-diameter sprocket in accordance with the feeding amount.

The shift operation device 1 has a basic configuration in which an operation lever 3 as an operation body is rotatably supported by a lever shaft 4 as a support attached to the handle 2.

As shown in FIG. 3, the lever shaft 4 is connected to a lever base 51 attached to the handlebar 2 via a band 5.
The tip 41 from the axial middle part is
It is a so-called oval shaped section. Further, a screw hole 42 is provided on the axial end face. The lever base 51 is also formed with an outer receiver 52 for fixing and holding the end of the outer cylinder W 'through which the cable W is inserted.

The operation lever 3 has a boss portion 31 and a finger arm 32 extending from the boss portion 31. The boss portion 31 has a bottomed cylindrical shape. As shown in FIG. 4, a support hole 34 to be fitted to the lever shaft 4 is formed in the bottom wall portion 33 thereof.
Are formed. A cable winding groove 35 is formed on the outer periphery of the bottom wall portion 33, and
Cable W extending from the outer cylinder W ′ held at
After being wound along the cable winding groove 35, the end nipple is locked to the arm 32, thereby being connected to the operation lever 3.

The positioning mechanism 6 is built in the internal space of the boss 31 of the operation lever 3. The positioning mechanism 6 is provided with a stop member 7 attached to the lever shaft 4 and an engaging body 8 attached to the operation lever 3.

In the present embodiment, the positioning member 7 is constituted by a plate-like member. As shown in FIGS. 5 and 7, the fitting hole 71 is fitted into the oval cross section 41 of the lever shaft 4. By doing so, it is attached to the lever shaft 4. As shown in detail in FIG. 5, the fitting hole 71 has a substantially hourglass shape, and when it is fitted over the lever shaft 4, the fitting hole 71 can play with respect to the lever shaft 4 at a predetermined angle α. is there. In addition,
The positioning member 7 includes a plurality of engagement recesses 72a, 72b, 72c.
Is provided, which will be further described later.

As shown in FIG. 4, the engagement body 8 is composed of two balls 8, 8 held respectively in holding holes 82 of two holding plates 81, 81 arranged so as to sandwich the plate-shaped positioning member 7. It is composed of Each holding plate 81, 81 has a central hole 83 and a locking projection 8
The center hole 83 is fitted to the lever shaft 4 so as to be relatively rotatable, and the locking projections 84 and 85 are engaged with the engaging recesses 36 and 37 provided on the operation lever side. By being combined, it is attached to the operation lever 3. That is, the engagement body (ball 8) rotates together with the operation lever 3.

The two balls 8, 8 are leaf springs 3 bent in a substantially U shape.
By attaching 6 to the laminated body of the holding plates 81, 81 and the positioning member 7, each is elastically urged against the surface of the positioning member 7. By doing so, the urging forces on the two balls 8, 8 are offset, so that no useless force acts on the positioning member 7. The leaf spring 86 holds each holding plate 8 in the assembled state.
The leaf springs 86 are accommodated in the engaging recesses 36 on the operation lever side together with the locking projections 84 of 1,81.
Does not move relative to the holding plates 81 in the assembled state.

Further, the laminated body of the holding plates 81, 81 and the positioning member 7 is integrated so as to be elastically pressed by a spring clip 87. Note that slide washers 88, 88 are interposed between the front and back surfaces of the positioning member 7 and the holding plates 81, 81. 7 and each holding plate 8
A constant frictional resistance is given to the relative rotation between 1,81.
The spring clip 87 has a bent portion 87a formed with a through hole 87b.
Is opened, and the locking projections 85 of the holding portions 81, 81 protrude into the through-holes 87b, so that the spring clip 87 is inadvertently shifted with respect to the laminated body in the assembled state. Absent.

The U-shaped leaf spring 86 and the spring clip 87 are composed of the holding plates 81, 81 and the laminated body of the positioning member 7 therebetween, and the balls in the holding holes 83 of the holding plates 81, 81.
It also has the role of integrating 8, 8 into a cassette. Therefore, when assembling the shift operation device 1, for example,
A simple assembling method such as loading the cassette in the boss portion 31 of the operation lever 3 can be adopted, and assembling operability is improved, and in the cassette state, the holding plates 81, 81, the positioning member 7, the U-shaped By stocking leaf spring 86, spring clip 87 and balls 8,8,
Parts management is also simplified.

Now, the above-mentioned plate-shaped positioning member 7 will be described with reference to FIGS.
As shown in the drawing, a first member having the above-described substantially hourglass-shaped fitting hole 71
7a and a second member 7b which is loosely held in a holding hole 73 formed in the first member 7a.

As shown in FIG. 5, above the first member 7a, the engaging hole 72 for the first stage which corresponds with small sprocket S ₁ in chain wheel CW having three sprockets shown in FIG. 8
and a, engaging holes 7 for the third stage corresponding with large sprocket S ₃
2c are formed at a constant radius position with respect to the lever shaft 4 at a predetermined intermediate angle. The holding hole 73 is formed in a region between the first-stage engagement hole 72a and the third-stage engagement hole 72c. The holding hole 73 has an outer arc inner edge 73a extending at a predetermined central angle, an inner arc inner edge 73b extending at a larger central angle, and crank-shaped inner edges 73c, 73c connecting the circumferential ends of these arc inner edges.
It has the form which has. The crank-shaped inner edge
The radial direction of the circumferentially extending portion 73cx in the 73c, 73c with respect to the lever shaft 4 coincides with the radial position of each of the engagement holes 72a, 72c.

On the other hand, as shown in FIG. 6, the second member 7b loosely fitted in the holding hole 73 has an outer circular outer edge 74a, and an inner circular outer edge 74b extending with a central angle larger than the central angle of the outer circular outer edge. It has a form having crank-shaped outer edges 74c, 74c connecting the circumferential inner ends of these arc outer edges, and the first-stage engagement hole 72a and the third-stage engagement hole 7c.
At the same radial position as 2c, engaging holes 72b for the second stage corresponding to the intermediate sprocket S ₂ is formed.

The center angle of the outer arc outer edge 74a and the center angle of the inner arc outer edge 74b of the second member 7b are respectively equal to the center angle of the outer arc inner edge 73a and the center angle of the inner arc inner edge 73b of the holding hole 73. It is set small. further,
The radial position of the circumferentially extending portion 74cx in the crank-shaped outer edge 74c with respect to the lever shaft 4 corresponds to the radial position of the circumferentially extending portion 73cx in the crank-shaped inner edge 73c on the holding hole 73 side.

Therefore, as shown in FIG. 7, the second member 7b
Is movable relative to the lever shaft in the circumferential direction of the lever shaft by a predetermined angle β while being held in the holding hole 73 of the first member 7a. The relative movable angle β is, as can be seen from the above, the central angle of the outer circular arc inner edge 73a of the holding hole 73 and the second member 7
This angle corresponds to the difference from the center angle of the outer circular arc edge 74a of b. The circumferentially extending portion 73cx of the crank-shaped inner edge 73c of the holding hole 73 and the circumferentially extending portion 74cx of the crank-shaped outer edge 74c of the second member 7b are in contact with each other at the same radial position.

As shown in FIG. 4, the boss portion 31 of the operation lever 3 is provided.
Is closed by the lid member 39. Further, the cover member 9 is attached by screwing a screw 43 into the shaft end screw hole 42 of the lever shaft 4 so as to cover the cover member 39. At the end of the surface of the cover member 39, a numeral indicating the number of gears is displayed as shown in FIG. 1, while an appropriate part of the cover member 9 has a window facing one of the numerals. A notch 91 is formed.

Next, the operation of the speed change operation device according to the first embodiment having the above configuration will be described.

Now, with reference to FIGS. 5 and 7, it is assumed that the ball 8 is engaged with the first-stage engagement hole 72a. At this time,
The chain guide of the front derailleur takes a position X ₁ (FIG. 8) corresponding to the small diameter sprocket S ₁ of the front chain wheel CW. Since the elastic return force on the front derailleur side acts on the cable W, the first
The member 7a is located at one end (in the direction of the arrow q) of the playable range α relative to the lever shaft 4 (FIG. 5).

Next, the operating lever 3 is pulled in the cable pulling direction, that is,
Rotate in the direction of arrow P. Since the ball 8 is attached to the operation lever 3, the first member 7a of the positioning member 7
While maintaining the engagement between the first-stage engagement hole 72a and the ball 8, it rotates together to the other end (the direction of the arrow p) of the relative play movable range α with respect to the lever shaft (the virtual line in FIG. 5). ).
Since the first member 7a can no longer rotate in the direction of arrow p, when the operation lever 3 further rotates in the direction of arrow P, the ball 8 separates from the first-stage engagement hole 72a, It slides in the direction of arrow P on the surface of the first member 7a.
Subsequently, the ball 8 is provided with a circumferentially extending portion 73cx (second member 7c) at the crank-shaped inner edge 73c of the holding hole 73 of the first member 7a.
b, slides along the circumferentially extending portion 74cx) of the crank-shaped outer edge 74c, and moves to the surface of the first member 7b. Ball 8 above
Moves the second member 7b in the playable range β with respect to the first member 7a in the direction of the arrow p by frictional force because the second member 7b is sandwiched by elastic force. Eventually, the ball 8 engages with the sense of moderation in the second-stage engaging hole 72b of the second member 7b. At this time, the chain guide of the front derailleur moves the playable range α of the first member 7a with respect to the lever shaft 4.
And the playable range β of the second member 7b with respect to the first member 7a.
With the sum (alpha + beta) over shift amount corresponding to (X ₂ -X ₂ of FIG. 8 ') of the moved to the intermediate sprocket S ₂ side, instead multiplied rapid chain is executed.

Next, when the hand is released from the operation lever 3, the operation lever 3 is equivalent to the above-mentioned overshift amount while the state of engagement of the ball 8 with the second-stage engagement hole 72b is maintained by the derailleur-side return force. Angle (α + β) automatically returns in the direction of arrow Q and turns and stops. At this time, the chain guide of the front derailleur shifts from the overshift state (X ₂ ′ in FIG. 8) to a position corresponding to the intermediate sprocket S ₂ (X _{2 in} FIG. 8).
Return to

When the operation lever 3 is rotated in the direction of arrow P from the state where the ball 8 is engaged with the second-stage engagement hole 72b of the second member, the ball 8 is dragged by the movement in the direction of arrow P. Then, the second member 7b is divided into the second member 7b and the first member 7a.
And the first member 7a rotates in the direction of the arrow P corresponding to the sum of the play (β) and the play (α) of the first member 7a with respect to the lever shaft 4. When the operation lever 3 is further turned in the direction of arrow P,
Since the second member 7b can no longer rotate in the direction of the arrow P, the ball 8 is engaged with the second step engaging recess 72 of the second member 7b.
b, and slides on the surface of the second member 72b. Subsequently, the ball 8 is connected to the crank-shaped outer edge 74 of the second member 7b.
The circumferentially extending portion 74cx at c (the circumferentially extending portion 73cx at the crank-shaped inner edge 73c in the holding hole 73 of the first member 7a)
, And moves to the surface of the first member 7a. Since the ball 8 further slides in the direction of arrow P while elastically holding the first member 7a, the first member 7a is at the end of the playable range α in the p direction. Eventually, the ball 8 enters the third-stage engaging hole 72c of the first member 7a with a sense of moderation. In this case, chain guide of the front derailleur is moved with a over-shift amount corresponding to the play dynamic range α with respect to the lever shaft 4 of the first member 7a (Figure 8 of X ₃ -X ₃ '), large sprocket place over rapid delay for S ₃ is executed.

When the hand is released from the operation lever 3, the operation lever 3 is returned to the derailleur side by an amount corresponding to the above-mentioned overshift amount while the state of engagement of the ball 8 with the third engagement hole 72c is maintained. Angle (α) automatically returns in the direction of arrow q and turns and stops. At this time, from the overshift state (X ₃ ′ in FIG. 8) of the front derailleur chain guider,
Returns to the position corresponding to the large sprocket S ₃ (X ₃ of Figure 8).

As described above, according to the shift operation device 1 having the above configuration,
The overshift amount (X ₂ -X ₂ ′ in FIG. 8) when the intermediate sprocket S ₂ is replaced with a chain is larger than the large sprocket S _3.
The amount of overshift when changing to
X ₃ −X ₃ ′), and the front derailleur can perform a shift operation with an appropriate overshift amount at each shift speed.

Incidentally, the small sprocket S ₁ from the large sprocket side S ₃
When the chain is replaced with a chain, the overshift operation as described above does not occur. As described repeatedly, the operating lever 3 always has the cable feeding direction,
That is, since the return force in the direction of the arrow Q is acting, the first member 7a and the second member 7b of the positioning member 7 into which the ball 8 attached to the operation lever is engaged are moved in the respective play movement movable ranges ( α, β) at the end in the q direction and cannot move further in the arrow Q direction. Therefore, when the operating lever 3 is rotated in the direction of arrow Q, the ball 8 is disengaged from the engaging recess which has been engaged so far, and the positioning member 7
After the sliding on the surface of the base member, a normal positioning operation of engaging with the adjacent engaging recess with a sense of moderation is performed.

9 to 12 show a second embodiment of the shift operation device for a vehicle according to the present invention. This embodiment is an example configured to operate a rear derailleur to perform a shift on a multi-stage freewheel FW (FIG. 13). The vehicle speed change operation device 1 of this example is provided, for example, near a right grip of a handlebar.

This speed change operation device also has a basic configuration in which an operation body in the form of an operation lever 3 is rotatably supported with respect to a lever shaft 4 attached to the handle 2. The lever shaft 4 protrudes from a lever base 51 attached to the handlebar via a band 5, and its axial end has an oval cross section as shown in FIG. 9. . A screw hole 42 is provided in the axial end face.

The operation lever 3 has a bottomed cylindrical boss 31 and a finger arm 32, and a support hole 34 to be fitted to the lever shaft 4 is formed in the bottom wall 33 of the boss. At the same time, a cable winding groove 35 is formed on the outer periphery of the bottom wall portion 33. Then, similarly to the first embodiment, the other end of the cable W, one end of which is connected to the rear derailleur,
The operation lever 3 is connected via the cable winding groove 35.

The positioning mechanism 6 is built in the internal space of the boss 31 of the operation lever 3. Also in this embodiment, the positioning mechanism 6 includes a positioning member 7 attached to the lever shaft 4.
And an engagement body 8 attached to the operation lever 3.

The positioning member 7 includes a plate-shaped first member 7a and a second member 7a.
7b, the first member 7a and the second
The member 7b is attached to the lever shaft 4 by fitting the fitting hole 71 into the oval cross section 41 of the lever shaft 4 respectively. As shown in detail in FIGS. 11 and 12, the fitting holes 71 of the members 7a and 7b have a substantially hourglass shape, and when fitted to the lever shaft 4, the predetermined angles α ₁ and α ₂ Is movable with respect to the lever shaft. However, the play operation possible range (α ₁ , α ₂ ) is set to be larger than that of the first member 7a (α ₁ > α ₂ ).

As described later, the first member 7a is a member for performing positioning corresponding to the small diameter sprocket of the multi-stage freewheel FW (FIG. 13), and the second member 7b is corresponding to the large diameter sprocket. It is a member for performing the determined positioning. The first member 7a is provided with engaging holes 72a, 72b, 72c for the first, second and third steps on the small diameter side at predetermined radial positions with respect to the lever shaft at predetermined angles. In the second member 7b, engaging holes for the fourth and fifth steps on the large diameter side are provided.
72d and 72e are also provided at a predetermined radius position with respect to the lever shaft 4 at a predetermined angle. The first member 7a and the second member 7b include a compression coil spring 10 inserted into the lever shaft 4.
Accordingly, the operation lever 3 is pressed against the bottom surface of the boss portion.

On the other hand, on the bottom surface of the operation lever 3, two balls 8a, 8b as an engagement body are buried while constantly biasing toward the bottom surfaces of the positioning members 7a, 7b. This ball 8a, 8
The embedding position of b is the same radial position as each of the engaging recesses 72a, 72b, 72c, 72d, 72e in the positioning member 7. The first ball denoted by reference numeral 8b is a ball dedicated to the first member 7a, and the second ball denoted by reference numeral 8b is a ball dedicated to the second member 7b. The arrangement of these balls 8a and 8b in the lever axis circumferential direction is such that, as the operation lever 3 is rotated, for example, in the cable pulling direction (direction of arrow P), first, only the first ball 8a is moved to the first stage of the first member 7a. , The second stage, and the third stage are engaged with the respective engaging holes 72a, 72b, 72c.
Only the ball 8b is set so as to engage with the fourth and fifth engagement holes 72d and 72e of the second member 7b. The opening of the boss 31 of the operation lever 3 is closed by a lid member 39.

Next, the operation of the shift operation device 1 according to the second embodiment having the above-described configuration will be described.

FIG. 9 shows a first stage positioning state. That is, the first ball 8a is engaged with the first step engagement hole of the first member 7a.
72a is engaged. Since a returning force is applied to the operation lever 3 in the cable feeding direction, that is, the direction of the arrow Q, the positioning first member 7a into which the first ball 8a attached to the operation lever 3 is engaged has its lever shaft. 4 is located at the end in the q direction (FIG. 11) of the playable range (α ₁ ) relative to 4.

When the operation lever 3 is rotated in the cable pulling direction, that is, the direction of the arrow P from this state, the first ball 8a
While the state of engagement with the first stage engagement hole 72a is maintained,
The first ball 8a is dragged by the movement of the first ball 8a.
The member 7a rotates freely to the q-side end of the playable range (α ₁ ). Since the first member 7a can no longer rotate in the direction of the arrow P, when the operation lever 3 further rotates in the direction of the arrow P, the first ball 8a moves into the first-stage engagement hole 72a.
The first member 7a slides on the surface of the first member 7a and elastically engages with the second-stage engaging hole 72b with a sense of moderation. At this time, the chain guide of the rear derailleur is connected to the first member 7a.
Play dynamic range (alpha ₁₎ over a shift amount corresponding to the moved with a (first 13 Figure Y ₂ -Y ₂ ') to the second-stage sprocket S ₂ side, recombinant subjected rapid chain runs .

Then, when the hand is released from the operating lever 3, the operating lever 3 returns to the above-mentioned overshift amount while the engagement state of the first ball 8a in the second-stage engaging hole 72b is maintained by the derailleur-side returning force. The corresponding angle (α ₁ ) automatically returns in the direction of arrow Q and turns and stops. At this time, the chain guide of the derailleur shifts from the overshift state (Y ₂ ′ in FIG. 13) to the second
Return to the position corresponding to the step sprocket (Y _{2 in} FIG. 13).

As described above, when the chain is changed from the small-diameter side to the second-stage sprocket and the third-stage sprocket, the first stage sprocket is replaced with the first stage sprocket.
An overshift operation corresponding to the playable range given to the member 7a is performed.

On the other hand, when changing the chain to the fourth and fifth sprockets, the fourth and fifth sprockets of the second member 7b are used.
The positioning operation by the second ball 8b being engaged with the step engagement holes 7d and 7e, and the overshift operation corresponding to the playable range (α ₂ ) given to the second member 7b are performed. Will be. In the case of this embodiment, the playable range (α ₁ ) given to the first member 7a is larger than that of the second member 7a.
13b, it is larger than the playable range (α ₂ ), so when the second and third stage sprockets S ₂ and S ₃ are replaced with chains, the overshift amount (Y _{2 in} FIG. 13) −
Y ₂ ′, Y ₃ −Y ₃ ′) is large, and the amount of overshift (13 th) when changing the fourth and fifth stage sprocket chains
(Y ₄ −Y ₄ ′, Y ₅ −Y ₅ ′) in the drawing becomes smaller, and eventually, the shift operation can be performed with an appropriate amount of overshift for each shift position in the multi-stage freewheel.

Next, a description will be given of a bicycle shift operation device according to a third embodiment of the present invention. The shift operation device according to the third embodiment is obtained by applying the present invention to a grip-type bicycle shift operation device having a special booster mechanism. The speed change operation device according to the third embodiment includes:
This is suitable for causing the front derailleur to perform a shifting operation. The specific configuration of the characteristic portion according to the present invention will be described later with reference to FIGS. 25 to 27. The structure of the grip-type speed change operation device provided with will be described below with reference to FIGS. 14 to 24.

FIG. 14 is a cross-sectional view showing a gearshift operating device 101 configured as a grip type. FIG. 15
FIG. 16 is a cross-sectional view of a main part taken along arrow V in the drawing, and FIG. 16 is a cross-sectional view of a main part taken along arrow VI of FIG. FIG. 17 is an exploded perspective view of the bicycle shift operating device 101 shown in FIG.

The bicycle shift operation device 101 is for causing a rear derailleur performing a chain change in a multi-stage freewheel to perform a shift operation. Therefore, the bicycle speed change operation device 101 is provided, for example, near the right grip 110 that is externally fitted to the right end of the handlebar 101A, as shown in FIG.

In FIG. 14, the speed change operating device 101 for a bicycle includes:
The operation cable W of the rear derailleur is pulled and extended by a booster mechanism configured by combining the first link 103B and the second link 104B.

In FIG. 17, the speed change operating device 101 for a bicycle includes:
In addition to having the first link 103B and the second link 104B,
An operating body 102B rotatably fitted to the handlebar 101A as a support, two ring bodies 117A and 117B fitted to the operating body 102B, and sandwiched between these two ring bodies 117A and 117B. Positioning plate 105B that is externally fitted to the operating body 102B,
A spring body 10 for configuring a positioning mechanism (click mechanism) by mutually engaging the positioning plate 105B and the ring bodies 117A, 117B via two balls 161, 161.
6B, an upper member 191A and a lower member constituting a housing cover 109B for housing and protecting each of the above members
191B and other components described below.

FIG. 18a is a front view of the operation body 102B, and FIG. 18b is a half sectional view taken along line X5-X5 of FIG. 18a. This operation body 1
02B includes a through hole 120 for allowing the operating body 102B to be fitted onto the handlebar 101A, and a convex portion 125 for fitting a spline groove 128a of the operating grip 128 as shown in FIG. It is a cylindrical grip type formed on the outer peripheral surface.

A protrusion is provided on a part of the outer periphery of the flange 121B of the operating body 102B.
126 are provided. The protrusion 126 moves in accordance with the rotation operation of the operating body 102B, and when the bicycle user rotates the operation grip 128 to perform a shift operation,
The protrusion 126 moves along the outer peripheral surface of the upper member 191A of the housing cover 109B. This upper member 19
On the outer surface of 1A, for example, as shown in FIG.
The gear position of the rear derailleur is displayed, for example, by sticking a label 192 indicating the number from "6" to "6". The protrusion 126 serves as an indicator for supporting the gear position of the rear derailleur. Play a role.

Further, the front cylindrical portion 129 of the operating body 102B has a plurality of recesses 129a formed on the outer peripheral surface of the front end portion thereof, and is intermittently formed so as to form a gap 129b at the front end portion of the front cylindrical portion 129. The plurality of protrusions 129c protruding from the
Groove 129d for snap ring SR formed on the outer circumference of 129c
And so on. As will be described later, each of these parts is a part for externally holding the positioning plate 105B and the ring bodies 117A and 117B on the operation body 102B.

FIG. 19a is a plan view showing one of the two ring bodies 117A and 117B, FIG. 19b is a front view thereof, and FIG. 19c is a sectional view taken along line X6-X6 in FIG. 19b. It is. The ring body 117B is a front cylindrical portion of the operation body 102B.
It has a hole 118a so that it can be externally fitted to 129. On the inner peripheral surface of the hole 118a, for example, a total of four projections 118 are provided which can be engaged with the recess 129a of the operating body 102B or the gap 129b between the projections 129c. Therefore, the ring body 117B is fitted to the operating body 102B so as to be engaged with the operating body 102B so that the ring body 117B cannot rotate relative thereto. When the operating body 102B rotates, the ring body 117B rotates in conjunction with the rotation.

The ring body 117B has a holding hole 142B for fitting a ball 161 constituting a step positioning mechanism, and a protrusion 119b for engaging a spring body 106B as described later.
In addition to the first link 10 shown in FIG.
Hole for connecting one end 103a of 3B via pin 131B
123B is also drilled. Note that, as shown in FIG. 19c, the formation position of the hole 123B is stamped and formed by a predetermined dimension t from the periphery thereof.
This is for securing a clearance area for performing the caulking process at the tip of 1B.

In FIG. 17, the other ring body 117A has the same basic configuration as the one ring body 117B, and a detailed description thereof will be omitted. However, the other ring body 117A
Does not have a hole 123B for connecting the first link 103B. Further, the projection 119a for engaging the spring body 106B is bent in the direction opposite to the projection 119b of the one ring body 117B.

FIG.20a is a front view of the positioning plate 105B,
FIG. 20b is a right side view thereof. This positioning plate 105B
Is formed in a hollow disk shape having a hole 150B so as to be able to fit into the front cylindrical portion 129 of the operation body 102B. The positioning plate 105B is provided with, for example, a total of six engaging holes 151a to 151f for engaging the ball 161 in a series on an arc locus having a predetermined radius R5. These engagement holes 15
1a to 151f are balls 161 held by ring bodies 117A and 117B.
, And corresponds to the gear position of the multi-stage freewheel.

The positioning plate 105B is provided with the two ring bodies 117A, 1A.
Unlike 17B, it is not engaged with the front tubular portion 129 of the operating body 102B, and is fitted to the operating body 102B so as not to rotate in conjunction with the operating body 102B. However, a fixed shaft 180B fixedly mounted in the lower member 191B of the housing cover 109B and a sleeve 187 externally fitted to the fixed shaft 180B are provided in a cutout recess 152B formed on the outer peripheral surface of the positioning plate 105B.
Is inserted, whereby rotation of the positioning plate 105B can be prevented.

The outer diameter of the sleeve 187 is smaller than the width of the cutout recess 152B, and the positioning plate 105B is rotatable by a slight angle around the operation body 102B within the range of the gap λ2. . Thus, overshifting is also possible in this shift operation device.

FIG. 21 is an enlarged cross-sectional view of a main part of line X7-X7 in FIG. 14,
A step positioning mechanism constituted by the two ring bodies 117A, 117B, the positioning plate 105B, the spring body 106B, and the balls 161, 161 is shown. As shown in the figure, two ring bodies 117A, 117B are provided on the front cylindrical portion 129 of the operating body 102B.
These members are fitted to each other with the positioning plate 105B sandwiched between them. As described above, the two ring bodies 117A and 117B rotate in conjunction with the operating body 102B, whereas the positioning plate 105B does not interlock with the operating body 102B. Note that a snap ring SR is locked and mounted in the concave groove 129d formed on the outer periphery of the plurality of protrusions 129c of the operation pair 102B, thereby positioning each member in the long axis direction of the operation body 102B. Retention has been made.

Balls 161 and 161 are fitted into the holes 142B and 142B of the two ring bodies 117A and 117B, respectively, and these balls 161 and 161 are pressed inward by a pair of opposing pieces 160 and 160 of the spring body 106B. The positioning plate
It is designed to engage with any of the engagement holes 151a to 151f of the 105B. Therefore, in this positioning mechanism, the operating body
When 102B rotates, the positioning plate 105B does not rotate interlockingly, but the other two ring bodies 117A and 117B and the spring body 1
06B and the balls 161, 161 will rotate together with the operating tool 102B.

Specifically, for example, when the balls 161, 161 are previously engaged in the engagement holes 151a of the positioning plate 105B,
When the operating body 102B is rotated to rotate the ring bodies 117A, 117B, etc., the balls 161, 161 can be disengaged from the engaging holes 151a, and then engaged with the adjacent engaging holes 151b. Is possible. Similarly, the balls 161 and 161 are also inserted into the other engagement holes 151c to 151f.
Can be sequentially disengaged.

FIG. 22 is an enlarged sectional view of a main part taken along line X8-X8 in FIG.
As shown in the figure, a pair of opposing pieces 160 of the spring body 106B,
The reference numeral 160 is arranged inside the bent projections 119a and 119b provided on the outer peripheral edges of the two ring bodies 117A and 117B, and is engaged with these projections 119a and 119b. As a result, the spring 106B is engaged with and held by the two ring bodies 117A and 117B, thereby preventing the spring 106B from dropping from the ring bodies 117A and 117B.

In FIGS. 14 and 17, the first link 103B
Is a through-hole 130a formed in one end 103a thereof and a ring body.
By inserting the pin 131B into the hole 123B of the 117B,
It is rotatably connected to the ring body 117B.
Therefore, by rotating the operation body 102B, the ring bodies 117A, 1
When the ring 17B is rotated, one end 103a of the first link 103B moves along the circumferential direction of the ring 117B with the rotation of the ring 117B.

The first link 103B is formed in an arc shape, so that a concave portion 130 having a radius of curvature Rb having the same or substantially the same dimension as the radius of the handlebar 101A is formed on the inner surface thereof. When the operating body 102B is rotated as shown in FIG. 23, the first link 103B can be arranged along the outer peripheral surface of the handlebar 101A, and the maximum rotation angle of the operating body 102 can be reduced. Can be bigger.

14 and 17, a through hole 140a provided at one end 104a of the second link 104B has the fixed shaft 18a.
One end of the sleeve 187 externally fitted to 0B is inserted. Thus, the second link 104B can swing vertically about the fixed shaft 180B and the sleeve 187. On the other hand, the through-hole 10 in the other end 104b of the second link 104B
4b and the through-hole 130b of the other end 103b of the first link 103B, a connecting pin 148B is inserted in series therewith, thereby the other end 104b of the second link 104B and the other end of the first link 103B. 103b is mutually connected so that rotation is possible.

As shown in FIG. 14, the second link 104B is
It is provided to swing vertically (along the vertical direction) below the handlebar 101A of the bicycle. Also,
The first link 103B is connected to the other end 103b of the second link 104B.
When the link 103B is not pulling the operation cable W,
Alternatively, when the pulling dimension of the operation cable W is small, the longitudinal direction of the first link 103B is set so as to be substantially in the vertical direction. Therefore, the second link 104B and the first link 103B are prevented from becoming large and bulky outward in the front-rear direction of the handlebar 101A. As a result, the width of the entire apparatus in the front-rear direction can be considerably reduced, and the appearance can be improved.

A bracket 175 for an operation cable is rotatably connected to a substantially central portion in the longitudinal direction of the second link 104B via a pin 176. An operation cable W is inserted into a hole 175b formed in the bottom plate portion 175a of the bracket piece 175, and a nipple 114 fastened to a distal end thereof is hooked on the low plate portion 175a. You. Therefore, the operation cable W is pulled or extended with the vertical swinging operation of the second link 104B.

However, the direction N1 in which the operation cable W is pulled out from the upper end of the cable guide 194B is the same as that in the second link 104B.
Are set to substantially coincide with the swing direction N2 of the mounting position of the bracket piece 175 in FIG. Accordingly, when the operation cable W is pulled or extended by the second link 104B with the swing, the operation cable W is pulled from the upper end portion of the cable guide 194B while maintaining the linear shape. Further, the operation cable W is not pulled while swinging largely up and down or left and right, but is always pulled along substantially the same linear locus.

In FIG. 17, the upper member 191A and the lower member 191B of the housing cover 109B have clamp portions 198a and 198b for clamping the handlebar 101A from above and below, and these clamp portions 198a and 198b are bolts and nuts. 191
By being mutually fastened by b and 191c, it is fixed to the handlebar 101A. A set screw 182a is screwed to the lower member 191B, and the set screw 182a is attached to the handlebar.
By pressing against the outer surface of 101A, the housing cover 109B is prevented from rotating improperly around the handlebar.

In the bottom of the lower member 191B, a through hole for fitting and holding the upper end of the cable guide 194B of the operation cable W is provided.
195B is provided. Also, the lower member 191B includes
A hole for fixing and holding the rotation stop of the positioning plate 105B and the fixed shaft 180B serving as a rotation fulcrum of the second link 104B.
185B is also drilled.

In the bicycle shift operating device 101 having the above-described configuration, when the operating body 102B is rotated in the direction of arrow b1 in the state shown in FIG. 14 and rotated to the angle shown in FIG.
One end 103a of first link 103B moves by a predetermined dimension L3 around handlebar 101A with the rotation of 2B. Then, along with the operation of the first link 103B, the second link 104B
However, the swinging operation is performed upward about the sleeve 187 on the one end 104a side, whereby the bracket 175 for the operation cable connected to the second link 104B is raised, and the operation cable W is pulled. Will be done.

When the operation cable W is towed as described above, the first link 103B and the second link 104B are a booster mechanism. Accordingly, the movement amount of each part of the second link 104B is smaller than the movement dimension L3 of the one end 103a of the first link 103B, and the pulling dimension L4 of the operation cable W is smaller.
Is considerably smaller than the moving dimension L3 of the one end 103a of the first link 103B. As a result, this transmission operating device
In 101, the rotation operation angle of the operation body 102B can be made larger than the actual towing dimension of the operation cable W, and the operation grip 128 externally fitted to the operation body 102B is turned by a large angle. By doing so, the shift operation of the rear derailleur can be accurately performed step by step. Further, the operation torque required for the rotation operation of the operation body 102B can be reduced.

Further, the operation cable W pulled by the second link 104B is pulled straight or substantially straight from the upper end of the cable guide 194B. As a result, a guide member for guiding the operation cable W is not required, and the number of components can be reduced. Further, the frictional resistance generated in the operation cable W when the operation cable W is pulled can be further reduced, and the operability of the shift operation can be improved.

On the other hand, when the operating body 102B is sequentially rotated as described above, the balls 161 and 161 held by the two ring bodies 117A and 117B are positioned on the positioning plate 105B that cannot rotate in conjunction with the operating body 102B. Move relative to. Then, at the time of the movement, each of the balls 161 sequentially engages with and separates from the engagement hole 151a of the positioning plate 105B into each of the other engagement holes 151b to 151f. Therefore, the two ring bodies 117A and 117B, and thus the operating body 102B, are operated by the function of the click mechanism, ie, the positioning mechanism, in which the ball 161 is engaged with any of the engagement holes 151a to 151f.
Can be positioned at a desired rotation angle, and the rear derailleur can be held at a desired gear position.

Also, in the positioning mechanism constituted by the positioning plate 105B, the ball 161 and the like, an overshift operation can be performed as described below.

That is, first, since the spring force in the direction of pulling the operation cable W toward the rear derailleur side is always applied on the rear derailleur side, the bicycle user releases his / her hand from the operation grip 128 externally fitted to the operation body 102B. 24a, for example, as shown in FIG. 24a, the positioning plate 105 engaged with the ball 161 constituting the click mechanism.
In B, the pulling force of the operation cable W toward the rear derailleur acts as a rotation in the direction of arrow c1, and the inner surface 152d on one end side of the cutout recess 152B of the positioning plate 105B is sleeved.
Stable in contact with 187.

Next, for example, the engagement hole 15 of the positioning plate 105B is formed.
In the initial state where the ball 161 is engaged with the first derailleur 1a and the rear derailleur is set to the first speed, when the operating body 102B is rotated in the direction of arrow d1 as shown in FIG. After detaching from the hole 151a, the next engagement hole 1
Join 51b. However, even after this, the other end side inner surface 152e of the notch recess 152B of the positioning plate 105B is
Until it comes into contact with 7, the positioning plate 105B and the operation body 102B can be slightly rotated by an extra angle.
Accordingly, the operation cable W can be pulled more than the amount of pull required for the speed change operation of the rear derailleur by the amount that the positioning plate 105B can be rotated extra.

Then, the bicycle user operates the operating grip 128
24c, the positioning plate 105B is rotated in the direction of arrow c1 by the pulling force of the operation cable W to the rear derailleur side, as shown in FIG. Can be done. in this way,
Also in the above-mentioned click mechanism, the operation cable W can be temporarily pulled more than a desired required amount, and a reliable shift operation can be performed by overshifting the rear derailleur.

Assuming a structure having the above-described boosting mechanism, FIGS. 25 to 27c show a third embodiment in which the present invention is applied to a grip-type speed change operation device that causes a front derailleur to perform a speed change operation. Shown in FIG. 25 shows this third
FIG. 3 is a cross-sectional view of a speed change operation device 101a according to the embodiment,
FIG. 26 is a main part half sectional view taken along the line VII of FIG.

The bicycle shift operation device 101a is provided near the left grip 110a of the handlebar 101A to which the bicycle derailleur operation device 101 for operating the rear derailleur is attached, and has a three-stage chain wheel (front gear) S _1. , S ₂ , S ₃
This is for causing a front derailleur that changes the chain between (FIG. 8) to perform a shift operation.

The basic configuration of the bicycle shift operation device 101a is as follows.
The shift operation device 101 for rear derailleur operation described above with reference to FIGS.
The gear shift operating device 101 for operating the ear derailleur provided near the grip 110 on the right side of FIG. However, starting with the operating tool 102B,
First link 103B, second link 104B, two ring bodies 117
Parts such as A, 117B, spring body 106B, ball 161 and housing cover 109B use the same parts as those of the above-described speed change operation device 101.

Therefore, also in the bicycle shift operation device 101a, the operation cable W can be pulled and pulled out by rotating the operation body 102B,
It is possible to cause the front derailleur to perform the shift operation step by step. At that time, the operating body is operated by a booster mechanism including the first link 103B and the second link 104B.
The turning operation angle of the operating body 102B can be increased, and the operating torque required for the turning operation of the operating body 102B can be reduced.

However, in the bicycle shift operation device 101a, the ball 16 held by the two ring bodies 117A and 117B is not used.
The positioning plate 105C for engaging the 1,161 is different from the positioning plate 105B of the bicycle gearshift operating device 101 described above.

That is, as shown in FIG. 27a, the positioning plate 1
05C includes a hole 150B that allows the positioning plate 105C to be externally fitted to the operating body 102B, and a sleeve 18 that is externally fitted to the fixed shaft 180B.
7 has a notch recess 152B and the like, and a small-diameter sprocket S ₁ corresponding to the first and third speeds of the front gear.
Engaging holes 151 corresponding respectively to the large sprocket S ₃ and
g, 151i. A substantially T-shaped notch 154 is formed between the two engagement holes 151g and 151i, and a movable plate 153 (positioning) having an engagement hole 152h is formed in the notch 154. (Corresponding to a second member) is fitted so as to be relatively movable along the circumferential direction of the positioning plate 105C.

Therefore, the positioning plate 105C has the same overshift function as the shift operation device 1 according to the first embodiment described above with reference to FIGS. 1 to 7 as described below. That is, as shown in FIG. 27a, for example, the speed position of the front derailleur is set to the first speed, and the holes 161 and 161 held by the ring bodies 117A and 117B engage with the engagement holes 151g of the positioning plate 105C. From the state
When the operating body 102B is rotated in the direction of the arrow e1, as shown in FIG. 27b, the ball 161 can be disengaged from the engaging hole 151g and then engaged with the engaging hole 151h of the movable plate 153. In the state where the ball 161 is engaged in the engagement hole 151h, one end 153a of the movable plate 153 is
The movable plate 153 can be moved in the same direction (the direction of the arrow e1) as the operating body 102B until it comes into contact with the inner wall surface 155a at one end of the 05C. Further, the movable plate 153 is thus positioned with the positioning plate 1.
In the state where it is in contact with one end inner wall surface 155a of 05C, the notch recess 1
It is also possible to further rotate the positioning plate 105C in the direction of the arrow e1 to a position where the inner surface 152c on one end side of 52B contacts the sleeve 187.

As a result, the operating body 102B is additionally rotated by the total angle of the angle at which the movable plate 153 moves and the angle at which the positioning plate 105C rotates, thereby pulling the operating cable W necessary for a desired shift. It becomes possible to tow more than quantity. That is, when shifting from the first speed to the second speed, overshifting can be performed with a large amount of dimension. As described above, in the other stage chain wheel of the bicycle, the first speed (small diameter sprocket S ₁ ) is compared with the shift from the second speed (intermediate sprocket S ₂ ) to the third speed (large sprocket S ₃ ). It is generally difficult to shift from the first speed to the second speed (intermediate sprocket S ₂ ), so if the amount of overshift during shifting from the first speed to the second speed can be increased as described above, The gear shifting operation can be performed appropriately and reliably.

When the shift to the second speed is completed and the hand is released from the operating grip 128 externally fitted to the operating body 102B,
As shown in the figure, the movable plate 153 and the positioning plate 105C return in the direction of the arrow f1 and are stabilized by the pulling force of the operation cable W. Thus, the chain will be held in a position that exactly corresponds to the purpose and sprocket.

Next, when the ball 161 engaged in the engagement hole 151h is further moved to the next engagement hole 151i and engaged therewith, the larger the gear shift from the first speed to the second speed, the larger the overspeed. The shift amount is unnecessary, and the overshift effect of the movable plate 153 is not exhibited. However, also in this case, since the positioning plate 105C can be swung within the range of the gap λ3 between the notch concave portion 152B and the sleeve 187, an appropriate overshift can be performed.
The shift operation from the third speed to the third speed can be appropriately performed.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. 29c.

This fourth embodiment is a further modification of the above-described third embodiment in the form of the positioning plate 105C and the movable plate 153. That is, as shown in FIG. 28, the positioning plate 205C in the fourth embodiment has a hole 25 that allows the positioning plate 205C to be fitted to the operating body 102B.
0B and a notch concave portion 252B through which a sleeve 187 externally fitted to the fixed shaft 180B is inserted, which is common to the positioning plate 105C according to the third embodiment,
The configuration of the engagement holes 251g, 251h, and 251g for engaging the balls 161 and 161 held by 117A and 117B to define the gear position and the configuration of the movable plate 253 are changed.

That is, a substantially T-shaped opening 25 is formed in the positioning plate 205C.
A movable plate 253 (corresponding to a second member of the positioning member), which is also substantially T-shaped, is fitted into the opening 254 so as to be relatively movable by a predetermined distance around the periphery of the positioning plate 205C. ing. Further, concave arc portions 254a and 254b are formed at circumferential ends of the opening 254, respectively, and concave arc shapes 253a and 253b are formed at circumferential ends of the movable plate 253, respectively. As shown in FIG. 28, when the movable plate 253 is located at one end of its moving stroke, a concave arc portion 253a at one end of the movable plate 253 and a concave arc portion 254a at one end of the opening 254 are formed. Cooperate to form an engagement hole 251g corresponding to the first speed, and when the movable plate 253 is located at the other end of its moving stroke, the concave arc portion 2531b at the other end of the movable plate 253 and the opening The engagement hole 251h corresponding to the second speed is formed in cooperation with the concave arc portion 254b at the other end of the 254. Also, the engagement hole 251i corresponding to the third speed is provided.
Are formed independently at positions spaced apart from the opening 254 in the circumferential direction.

In the above configuration, as shown in FIG. 29a, the speed position of the front derailleur is set to the first speed, and the ring body 117
A, ball 161 held by 117B is
From the state of engagement with the engagement hole 251g of the 05C, the operating body 102
When B is rotated in the direction of arrow e1, as shown in FIG. 29b,
After the movable plate 253 is pushed by the ball 161 to the other end of the moving stroke, the ball 161 slides on the surface of the movable plate 253, and then the ball 161 is moved into the second speed engagement hole 251h.
Can be engaged. At this time, the positioning plate 20
5C itself also has one end side inner surface 152C of notch concave portion 152B due to the rotational force in the direction of arrow e1 given from ball 161.
29a is rotated from the state shown in FIG. 29a until it contacts the sleeve 187.

Therefore, the operating body 102B is additionally rotated by the total angle of the angle at which the movable plate 253 moves and the angle at which the positioning plate 205C itself rotates, and the operation cable W
Can be towed more than the amount of towing required for a desired shift. That is, when shifting from the first speed to the second speed, an overshift with a large dimension is performed.

When the shift to the second speed is completed and the hand is released from the operating grip 128 externally fitted to the operating body 102B, the movable plate 253 is pulled by the pulling force of the operating cable W as shown in FIG. 29c. And the positioning plate 205C returns in the direction of the arrow f1 and stabilizes.

Next, in order to further move the ball 161 engaged in the engagement hole 251h to the next engagement hole 251i and engage the same, the larger overshift amount is required as in the case of the shift from the first speed to the second speed. This is unnecessary, and the overshift effect of the movable plate 253 is not exhibited. However, also in this case, since the positioning plate 205C can be rotated within the range of the gap λ3 between the notch concave portion 252B and the sleeve 187, an appropriate overshift can be performed, and the second speed to the third speed can be obtained.
The shift to the high speed can be appropriately performed.

Of course, the scope of the present invention is not limited to the above embodiments. In each of the embodiments, the engaging body that constitutes the positioning mechanism is attached to the operating body side, and the positioning member is attached to the support body side. Conversely, the engaging body is attached to the support body side, and the positioning member Is attached to the operation body side, of course, also belongs to the scope of the present invention.

Further, in each of the embodiments, the positioning member is divided into two, but the number of divisions can be further increased. Then, the overshift amount can be set more finely.

Claims (10)

(57) [Claims] An operating member supported on the supporting member so as to be rotatable around its axis and capable of pulling or extending one end of a cable, the supporting member and the supporting member. An engaging member provided on one of the operating members; and a positioning member provided on the other of the supporting member and the operating member and having a plurality of engaging portions. In the bicycle speed change operation device, the union is adapted to perform a positioning operation by sequentially elastically engaging with a plurality of engaging portions of the positioning member, wherein the positioning member divides the plurality of engaging portions into a plurality of groups. The first member is divided into a plurality of members including the respective groups, and a first member of the first member is movable relative to a member provided with the positioning member by a predetermined angle around the axis of the support. Parts below the parts Is a gear shift operating device for a bicycle, characterized in that it is capable of moving relative to the first member in a circumferential direction of the support at a predetermined angle. 2. The bicycle transmission according to claim 1, wherein the engaging member is provided so as to rotate with the operating member, and the positioning member is provided on the support member. Operating device. 3. The two engaging members held in respective holding holes of two holding solders which are rotatable relative to the support member and are not rotatable relative to the operating member. The positioning member is a plate-shaped member whose first member is fitted to the support so as to be rotatable relative to the support by a predetermined angle, and which is disposed between the two holding plates. The speed change operating device for a bicycle according to claim 2, wherein the engaging portion is constituted by a member, and the engaging portion is constituted by a through hole provided in the plate-shaped positioning member. 4. The ball is positioned between the two holding plates by a substantially U-shaped leaf spring mounted on the two holding plates so as to sandwich the two holding plates from both sides in the thickness direction. The bicycle shift operating device according to claim 3, wherein the device is biased toward the plate-shaped positioning member. 5. The speed change operation for a bicycle according to claim 4, wherein the laminated body including the two holding plates and the plate-shaped positioning member located between the two holding plates is held by a spring clip. apparatus. 6. A supporting body, an operating body which is rotatably supported around the axis with respect to the supporting body, and which can pull or extend one end of a cable; An engaging member provided on one of the operating members; and a positioning member provided on the other of the supporting member and the operating member and having a plurality of engaging portions. In the bicycle speed change operation device, the union is adapted to perform a positioning operation by sequentially elastically engaging with a plurality of engaging portions of the positioning member, wherein the positioning member divides the plurality of engaging portions into a plurality of groups. It is divided into a plurality of members including each group, of which the first member is movable relative to the member provided with the positioning member by a predetermined angle in the circumferential direction of the support, and the second member and the following members are provided. The member is located A speed change operating device for a bicycle, characterized in that it can move relative to the member on which the determining member is provided around the axis of the support at an angle different from that of the first member. 7. The bicycle transmission according to claim 6, wherein the engaging body is provided so as to rotate with respect to the operating body, and the positioning member is provided on the supporting body. Operating device. 8. The support body has the form of a lever shaft attached to a bicycle frame, and the operating body includes a substantially cylindrical boss portion rotatably fitted on the lever shaft, and the boss portion. The speed change operation device for a bicycle according to any one of claims 1 to 7, wherein the speed change operation device has a form of an operation lever having an arm portion extending from the portion. 9. The support member has a form of a handlebar or a cylindrical member fitted on the handlebar, and the operating body has a form of an annular body rotated by a grip member fitted on the handlebar. Claim 1 having
8. The bicycle disguise operating device according to any one of claims 7 to 7. 10. The bicycle shift operating device according to claim 9, further comprising a booster mechanism for reducing the amount of pulling or extending the cable with respect to the amount of rotation of the operating body.