JPH038557Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a bicycle gear shift operation device, in detail,
The present invention relates to a bicycle speed change operating device in which an operating lever is rotatably supported on a fixed member having a lever shaft, and one end of an operating wire is supported on the operating lever.

(Prior Art) In general, this type of bicycle gear shift operating device, when switching the transmission to a predetermined gear position by rotating the operating lever, rotates the operating lever to an appropriate position corresponding to the gear position. However, in a transmission operating device in which the operating lever is provided with a friction mechanism that provides resistance that overcomes the return spring of the transmission, it is difficult to operate the operating lever to the appropriate position. Generally, an overshift is performed, and when the chain engages with the desired sprocket, the sound emitted from the chain, gear, pulley, etc. is detected, and the lever is then returned by the amount equivalent to the overshift.

However, this operation not only requires skill, but also requires a lot of nerve in the shift operation.
The problem is that the operating time of the lever, that is, the time from the start of operating the lever to the time when the overshift is returned and the lever is released, becomes longer, and in other words, the time when the user cannot concentrate on driving and steering the bicycle becomes longer. It was hot.

However, in order to solve the above problem, the speed change operating device includes a positioning member having an engaging portion corresponding to each gear stage of the transmission, and a locking body that selectively engages with the engaging portion. It has been proposed that a lever positioning mechanism is provided so that the operating lever can always be rotated correctly to the appropriate position corresponding to the gear position.

When the positioning mechanism is incorporated into the speed change operation device in this way, the operation of the lever is simply a matter of switching the locking body to one of the engaging parts, and the transmission allows the chain to be properly positioned on the desired sprocket. This has the advantage of shortening the operating time of the operating lever, and there is no need to worry about shifting operations, allowing you to concentrate on driving and steering.

(Problem to be Solved by the Invention) However, according to a transmission operating device incorporating a positioning mechanism, one end of an operating wire supported by an operating lever is connected to the transmission, and the lever can be operated by connecting the other end of the operating wire to the transmission. When setting the transmission to a gear position corresponding to the multi-stage sprocket device, adjust the length of the operating wire and align the position set by the positioning mechanism with the gear position of the transmission, It is necessary to prevent the chain from making noise against each sprocket, and even if the operating wire is stretched and the chain guided by the transmission starts making noise against the sprockets,
As mentioned above, it is necessary to perform troublesome positioning to prevent the chain from making noise against the sprocket.

The present invention is an attempt to solve the above-mentioned problems when a positioning mechanism is provided in the prior art. , at least one group of engaging portions having an arrangement interval corresponding to each stroke of the gear stage is provided, so that the operating lever can be held by the engagement of the locking body also by the group of engaging portions. This makes it possible to easily align the position set by the positioning mechanism and the gear position in the transmission, and also to easily make corrections even if the operating wire is stretched.

(Means for Solving the Problems) The present invention has a structure for a bicycle in which an operating lever is rotatably supported on a fixed member having a lever shaft, and one end of an operating wire is supported on the operating lever. In the speed change operating device, a locking body is provided on one of the operating lever or a lever-side member made of a member that can rotate together with the operating lever, and a fixed-side member that cannot rotate with respect to the operating lever,
The other member of the lever side member and the fixed side member,
a first engaging part group consisting of a plurality of first engaging parts arranged in parallel at intervals commensurate with the strokes of each gear stage, and capable of holding the operating lever by engagement of the locking body; It consists of a plurality of second engaging parts disposed between the respective engaging parts in the first engaging part group and having intervals corresponding to each stroke of the gear stage, and is operated by engagement of the locking body. At least one second engaging portion group capable of holding the lever is provided.

(Function) Since the second engaging portion in the second engaging portion group is present between the first engaging portions in the first engaging portion group, the shift stage can be changed only in the first engaging portion group. Alternatively, switching the gear position only in the second engagement part group may be performed by the user (operator) in advance by giving the user (operator) a click feeling by adding an extra number of second engagement parts provided between the first engagement parts, or by It only teaches that the combined tone is one switching level. Therefore, when one second engaging part is provided between the first engaging parts, for example,
When the user switches the stage from one first engaging part to the next first engaging part by teaching the number, when the locking body engages with the one second engaging part. After sensing a click feeling or hearing an engagement sound, when the locking body further senses a click feeling or hears an engagement sound when the locking body engages with the next first engaging part. In other words, by sensing and hearing the number of times taught in advance, the user can recognize that there is a one-stage change. Also, one second
The same applies to the case where the stage is changed from the engaging part to the next second engaging part, and in the example described above, one first engaging part heats up between the second engaging parts, and the locking body heats up between the second engaging parts. After sensing the click feeling when engaging with the first engaging part or listening to the engaging sound, further sensing the clicking feeling when the locking body engages with the next second engaging part, Alternatively, when the user hears the engagement sound, that is, by feeling a click a predetermined number of times or by hearing the engagement sound, the user can recognize that the first stage is being switched.

Further, the other end of an operating wire whose one end is supported by an operating lever is connected to a transmission, and when the operating lever is operated, the transmission is positioned at a gear position corresponding to a multi-stage sprocket device. If the chain that guides the transmission makes noise against the sprocket, such as when the operating wire is stretched due to repeated gear shifting operations, the system detects this noise and performs adjustment operations to eliminate the noise. be. That is, when a sound is detected, the operating lever is rotated without adjusting the length of the operating wire, and the engagement that is engaged with the first engaging portion or the second engaging portion is removed. The stop body is engaged with the next second engaging part or first engaging part adjacent to the first engaging part or the second engaging part. By engaging the locking body with the next adjacent engaging portion, the length of the operating wire is adjusted, and the transmission can be set to a normal gear position.

(Example) Hereinafter, an example of the device of the present invention will be described 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.
An operating lever 3 is rotatably supported via a lever shaft 2, and when the operating lever 3 is operated, the operating wire W is
The rear transmission (not shown) is actuated via the rear transmission.

That is, this speed change operation device has the fixed member 1
A lever shaft 2 having a threaded hole 2a in the center and a circular shaft portion 2b and a non-circular shaft portion 2c on the outer peripheral surface is provided protrudingly.
An internal cavity 32 is formed in the boss portion having a diameter 1, and the shaft hole 31 of the operating lever 3 is fitted into the circular shaft portion 2b so as to rotate freely. A cylindrical part 42 having a non-circular hole 41 that is fitted in the non-circular shaft part 2c in a relatively non-rotatable manner is disposed along the bottom of the inner cavity 32 on one side of the cylindrical part 42. Flange 43
The cylindrical portion 42 of this positioning member 4 is fitted and supported by the non-circular shaft portion 2c. Further, a cylindrical portion 51 is fitted to the outside portion of the lever shaft 2 of the non-circular portion 41 of the cylindrical portion 42 of the positioning member 4 in a relatively non-rotatable manner.
and a lid portion 52 that faces the end surface of the boss portion of the lever shaft 2 on one side of the cylindrical portion 51.
The cylindrical portion 51 of the cap 5 is inserted into the non-circular hole 4 of the cylindrical portion 42 in the positioning member 4.
1, through the mounting bolt 50 and the cylindrical part 51, and by screwing into the screw hole 2a of the lever shaft 2, the lever shaft 2 is brought into contact with the end surface of the lever shaft 2 and fixed. .

However, the basic structure of the gear shift operating device of the present invention is as follows.
A locking body 6 is provided on one of the operating lever 3 or a lever side member made of a member that can rotate together with the operating lever 3, and a fixed side member that cannot rotate with respect to the operating lever 3, It consists of a plurality of first engaging portions 7 arranged in parallel on the other member of the side member and the stationary side member at intervals corresponding to the strokes of each gear stage, and when the locking body 6 is engaged, the operation is performed. A first engaging portion group A that is capable of holding the lever 3, and each of the engaging portions 7 in the first engaging portion group A. At least one second engaging portion group B is provided, which is made up of a plurality of second engaging portions 8, and is capable of holding the operating lever 3 by engagement with the stopper 6.

What is shown in the drawings is that in the inner cavity 32 of the operating lever 3 between the flange 43 of the positioning member 4 and the lid part 52 of the cap 5, around the cylindrical part 42 of the positioning member 4, A movable body 9 is provided so as to be engaged with the inner wall of the inner cavity 32 so as to be non-rotatable and movable in the axial direction, and a spring S is provided between the movable body 9 and the lid portion 52, At each opposing portion between the movable body and the flange 43,
One pair each of the locking body 6 and the first and second engaging portion groups A and B constituting the positioning mechanism of the operating lever 3 are provided.

The movable body 9 has outward engaging portions 91 formed at a plurality of locations along the outer periphery, while the engaging portions 91 are formed on the inner wall of the inner cavity 32 of the operating lever 3.
The guide grooves 33 are formed into which the guide grooves 33 are fitted so as to be non-rotatable and movable in the axial direction, and these guide grooves 33...
The engaging portions 91 of the movable body 9 are incorporated into the movable body 9 so as to guide them. The engaging parts 7...8 of the first and second engaging part groups A and B provided on the flange 43 of the positioning member 4 are arranged at pitches corresponding to the sprocket spacing of the multi-stage sprocket device. . Also, regarding the number of the second engaging part group B installed relative to the first engaging part group A, when the operating wire W is stroked for one gear shift, the chain makes noise against the sprocket during this stroke. The number of installations should be set so that it can absorb the so-called poor speed shifting range, and the range where the chain does not make noise against the sprocket, which is the so-called stable range. In other words, the value obtained by subtracting the stable region x of the chain from the stroke y of the first gear shift portion of the operating wire W, that is, the value of the minimum number of stable regions x that can fill the poor shifting region of the chain. , is the minimum value z required by the second engaging portion group B. In other words, when y−x/x is represented by n, when 0<n<1, Z=1, 1<
When n≦2, z=2,...k<n≦k+1 (however, k
=0,1,2...), then z=k+1. For example, when the stable area x is 1.5 mm and the stroke y is 3.5 mm, the value n is 1<n (=1.3
...) Since the inequality <2 holds true, the value z to be found is 2. Further, when the stability area x is 1.5 mm and the stroke y is 2.5 mm, the value n is 0<n (=
0.66...)<1 holds true, so the value z to be found is 1. Note that the drawing shows the case where z=1.

Incidentally, each of the engaging parts 7, 8, of the first and second engaging part groups A and B shown in the drawings is formed by a ratchet, and the locking body 6 is removable from the ratchet. It is formed by a protrusion that engages with.

More specifically, the first engaging portions 7 are formed on the flange 43 by ratcheting, the number of which is greater (for example, 6, 7) than the number of gear positions (for example, 5). The second engaging portions 8, the number of which is larger than the number of gear positions (for example, 6, 7), are formed by ratcheting at the half-pitch offset portions of the first engaging portions 7 constituting the group A. form,
The second engaging portion group B is configured. Regarding the ratchet shape of the first and second engaging parts 7 and 8, when the operating lever 3 is rotated against the return spring of the transmission, the locking body 6 slides into the first part. The inclination angle θ ₁ of the inclined surface R ₁ with respect to the line L in the axial direction is made larger than the inclination angle θ ₂ of the other second inclined surface (R ₂ ) with respect to the line L, for example, θ ₁ is 60°, Also, by setting θ ₂ to 40°, the first inclined surface
The holding resistance of the locking body 6 due to R ₁ is determined by the second inclined surface.
It is made smaller than the holding resistance of the locking body 6 due to _R2 , and the magnitude of the operating force in both directions on the operating lever 3 is made equal. Further, the protrusion shape of the locking body 6 provided on the movable body 9 is such that the first inclined surface θ ₁ that engages with the first inclined surface R ₁ of the first and second engaging portions 7 is aligned with respect to the line L. It is formed so that the angle of inclination is equal to θ ₁ .

Therefore, in the shift operating device configured as described above, between the first engaging portions 7 in the first engaging portion group A,
Since one or more second engaging parts 8 are provided, it goes without saying that the first engaging part group A is used to change the gear position, and the second engaging part group B is used to change the gear position. However, the user should be taught in advance that the click feeling or the number of engagement sounds in addition to the number of second engagement parts 8 provided between the first engagement parts 7 is one switching stage. It is. In other words, when one second engaging part 8 is provided between the first engaging parts 7 as described above, when switching the stage from one first engaging part 7 to the next first engaging part 7, After sensing the click feeling or hearing the engaging sound when the stopper 6 engages with the one second engaging part 8, the stopper 6 further engages with the next first engaging part 7. When the user senses a click when engaging or hears an engagement sound, in other words, the user is informed in advance that the two clicks or the engagement sound indicates a 1st step change. and
In this way, the user can recognize that the one step change has been completed by sensing two clicks or hearing the engagement sound. The same applies when switching the stage from one second engaging part 8 to the next second engaging part 8.
Since there is one first engaging part 7 between them, after sensing the click feeling when the locking body 6 engages with the one first engaging part 7 or hearing the engaging sound, When the locking body 6 engages with the next second engaging portion 8, a click feeling is sensed or an engagement sound is heard, that is, two click feelings are sensed, or the engagement occurs. By teaching the user in advance that hearing the sound indicates switching of the first level, it is possible to recognize that the switching of the first level has been completed by sensing two clicks or hearing the engagement sound. It can be done.

Further, the other end side of the operating wire whose one end is supported by the operating lever 3 is connected to the transmission, and the operating wire 3 is connected to the transmission.
When aligning the position set by the positioning mechanism with the gear position of the transmission in order to position the transmission at a gear position corresponding to the multi-stage sprocket device by the operation of With the operating wire W set at the highest speed position and the position set by the positioning mechanism at the highest speed position, the operating wire W is
It can be installed as before without the troublesome length adjustment. In this case, the locking body 6 engages with either one of the first and second engaging parts 7 and 8 located at the highest speed position, and
In this state, drive the pedal and check whether the chain guided by the transmission is making contact with the sprocket and making noise. In other words, with the locking body 6 engaged with the engaging portion 7 or 8, it is checked whether the chain is within a stable range in which no noise occurs relative to the sprocket.

If the chain is not within the stable range, that is, if it makes a noise, this noise is sensed and the next corrective operation is performed. That is, in this case, the locking body 6 engaged with the engaging portion 7 or 8 can be rotated by rotating the operating lever 3 without performing delicate adjustment of the relative length with respect to the outer cylinder. The next engaging part 8 or 7 adjacent to the engaging part 7 or 8 is engaged with the engaging part 7 or 8. By correcting the engagement of the locking body 6 with the next adjacent engagement part in this way, the relative length of the operating wire W with respect to the outer cylinder is adjusted, and the transmission is set at the normal gear position. It is possible. Therefore,
The alignment between the position set by the positioning mechanism and the gear position in the transmission can be easily and quickly completed.

Further, the first engaging part group A or the second engaging part group B
When changing the gear position using
Due to repeated gear shifting operations, the operating wire W is stretched, and the relative length of the operating wire W with respect to the outer cylinder becomes incorrect, causing the transmission to deviate from its normal gear position and the chain guided by the transmission to deviate from the stable range. Then, the chain comes into contact with the sprocket and makes a noise, but in this case as well, this noise is sensed and corrective action is taken. That is, the locking body engaged with the engaging portion 7 or 8 can be rotated by operating the operating lever 3 without making delicate adjustments to the relative length of the operating wire W with respect to the outer cylinder as described above. 6 is engaged with the next engaging part 8 or 7 adjacent to the engaging part 7 or 8. By correcting the engagement of the locking body 6 with the next adjacent engagement part in this way, the relative length of the operating wire W with respect to the outer cylinder is adjusted, and the transmission is set to the normal gear position. It can be fixed. Therefore, alignment between the position set by the positioning mechanism and the gear position in the transmission can be easily and quickly completed. After the chain noise due to the elongation of the operating wire W is eliminated as described above, the first engaging part group A or the second engaging part group B with which the locking body 6 is engaged is used to change the gear position. That is, from the state in which the gear position is set by engaging with the first engaging part 7 of the locking body 6, one second engaging part 8 in the second engaging part group B is changed by the above-mentioned engagement correction. When the gear position is set by engagement with After sensing the click feeling or hearing the engaging sound when engaging with the engaging part 7, the locking body 6 is
When the user senses a click or hears the sound of engagement when the second engaging portion 8 engages with the next second engaging portion 8, that is, senses a click or hears the sound of engagement a number of times taught in advance. By stopping the rotational operation of the operating lever 3, it is possible to perform a change of one step, and thereafter, by repeating the above operation, a change of a plurality of steps can be performed.

In addition, in the embodiment described above, the locking body 6
is provided on the movable body 9 that rotates together with the operating lever 3, and the first and second engaging portion groups A and B are provided on the positioning member 4 on the fixed side that cannot rotate with respect to the operating lever 3. However, conversely, the first and second engaging portion groups A and B may be provided on the movable body 9 that rotates together with the operating lever 3, and the locking body 6 may be provided on the positioning member 4 on the fixed side. , the operating lever 3 itself serving as the operating lever 3 side member, and the fixed member 1 serving as a fixed side member that cannot rotate with respect to the operating lever 3.
It is also possible to provide it in itself.

Further, in the above embodiments, the present invention was intended to be applied to a rear transmission, but it goes without saying that the present invention can also be applied to a front transmission.

(Effects of the invention) As described above, the present invention has a lever-side member that is made of an operating lever or a member that can rotate together with the operating lever, and a fixed-side member that cannot rotate with respect to the operating lever. A stopper is provided on the other member of the lever side member and the fixed side member, a stopper is provided on one of the operation lever side and the fixed member side, and the stopper is arranged on the other side at intervals corresponding to each stroke of the gear position. a first engaging part group that is made up of a plurality of first engaging parts provided therein and capable of holding the operating lever by engagement of the locking body; and each of the engaging parts in this first engaging part group. consisting of a plurality of second engaging portions disposed in between and having intervals commensurate with each stroke of the gear shift stage;
At least one second engaging portion group is provided that allows the operating lever to be held by engagement of the locking body;
By instructing the user in advance that the click feeling or the engagement sound, which is the sum of the number of second engagement parts provided between the first engagement part groups, is one switching stage, the above-mentioned It is possible to change the gear position only in one engagement part group or to change the gear position only in the second engagement part group. Moreover, the other end of the operating wire, one end of which is supported by the operating lever, is connected to the transmission, and the transmission is positioned at a gear position corresponding to the multi-stage sprocket device by operating the lever. When aligning the position set by the positioning mechanism with the gear stage of the transmission, the operating lever can be moved within the range of the operating amount corresponding to the stroke of one gear without the need for troublesome length adjustment of the operating wire. The locking body is rotated and adjusted in the first engaging part group, or the second engaging part provided between the first engaging parts in the first engaging part group. To quickly align a position set by a positioning mechanism of a speed change operating device with a gear position in a transmission by a very simple operation of engaging with one second engaging part of a group of joint parts. This is possible. In addition, even if the chain guided by the transmission makes noise against the sprocket, such as when the operating wire is stretched due to repeated gear shifting operations, the operating lever can be moved without having to make troublesome length adjustments of the operating wire. The locking body is rotated within the range of the operation amount corresponding to the stroke of one step, and the locking body is rotated to one of the first engaging portions of the first engaging portion group;
Alternatively, the positioning mechanism can be set by a very simple operation of engaging one of the second engaging parts of the second engaging part group provided between the first engaging parts of the first engaging part group. This allows the position to be quickly aligned with the gear position in the transmission.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is an enlarged sectional view of the main part, Fig. 2 is an explanatory diagram showing the state before assembly, and Fig. 3 is a cutaway taken along the - line in Fig. 1. FIG. 4 is an explanatory cross-sectional view showing the relationship between the locking body and the first and second engaging portions. DESCRIPTION OF SYMBOLS 1... Fixed member, 2... Lever shaft, 3... Operating lever, W... Operating wire, 6... Locking body, 7...
...first engagement part, A...first engagement part group, 8...second
Engagement part, B... second engagement part group.

Claims (1)

[Scope of utility model registration request] In a bicycle speed change operating device in which an operating lever is rotatably supported on a fixed member having a lever shaft, and one end of an operating wire is supported on the operating lever, the operating lever or the operating lever rotates together with the operating lever. a lever-side member made of possible members;
A locking body is provided on one member of the fixed side member that cannot rotate with respect to the operating lever, and a locking body is provided on the other member of the lever side member and the fixed side member in parallel at intervals corresponding to each stroke of the gear shift stage. the first of the plurality of
a first engaging part group consisting of an engaging part and capable of holding the operating lever by engagement of the locking body;
It consists of a plurality of second engaging parts disposed between the respective engaging parts in the engaging part group and having intervals corresponding to each stroke of the gear stage, and the operation lever is activated by engagement of the locking body. 1. A bicycle gear shift operating device comprising at least one second engaging portion group that can be held.