JPH0674075B2 - Bicycle operation rope adjustment device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle operation rope adjusting device, and more particularly, to an operation rope adjusting device stretched between a gear shift operation device and a transmission of a bicycle.

(Prior Art) Conventionally, a gear shift operation device and a transmission are provided, and the movement by rotation of an operation lever in the gear shift operation device is transmitted to the transmission through an operation line, and a chain guide of the transmission is used to provide a multi-stage sprocket device. In a bicycle in which a chain is hooked on one sprocket, a plurality of concave engaging portions and an engaging body such as a ball engaging with one of the engaging portions and the engaging body are provided in the speed change operation device. Is provided with a positioning mechanism composed of a spring that presses the engaging portion, and at the same time the transmission gear position is determined by the engagement of the locking body with the engaging portion.
When the lever is stopped at a position corresponding to the gear, and the operation rope is not extended, the chain guide of the transmission is set to a stable region for each sprocket of the multi-stage sprocket device, specifically, the chain. Although it can be stopped in a stable region where the chain guide or the sprocket does not contact, the operation amount of the operation lever is constant when the operation line extends due to repeated shifting operations, whereas the movement of the chain guide moves. The amount is insufficiently moved by a stroke corresponding to the extension amount of the operation rope, and as a result, the position of the chain guide with respect to the sprocket is misaligned, and the chain guide stops outside the stable area.

Therefore, the chain hooked by the chain guide becomes a region of the sprocket meshing with the chain, and the chain and the tooth tips of the sprocket come into contact with each other to make a noise.

However, in the case of a gear shift operation device having a positioning mechanism, since the operation lever is held at a position corresponding to the gear position, the operation lever cannot be rotated excessively even if the operation rope extends. .

Therefore, when the operation rope stretched between the transmission and the transmission having the conventional positioning mechanism extends, the adjustment bolt is used by rotating the adjustment bolt by using the adjustment bolt provided in the transmission. Is adjusted so that the chain guide is returned to the stable region.

(Problems to be solved by the invention) However, when the adjustment rope is adjusted by the rotating operation of the adjustment bolt, the operation rope is formed at the boundary between the stable region and the unstable region deviated from the stable region. Since it is necessary to adjust the length of the operating rope, it is difficult to know how much the adjusting bolt should be rotated with respect to the extension amount of the operating rope, and there is a problem that it is difficult to adjust that much. There is a problem that the adjustment frequency is increased because the stable region is shifted to the unstable region with a small amount of expansion.

According to the present invention, when a chain is engaged with one sprocket of a multi-stage sprocket device, the chain contacts the chain guide or the sprocket between the sprocket engaged with the chain and the sprocket adjacent to the sprocket. Pay attention to the fact that there is a stable area of a predetermined width, and by making it possible to adjust the length of the operation rope in stages using this stable area width as a guide, the length of the operation rope can be easily and quickly set. Can be adjusted to
By making it possible to reduce the frequency of adjustment and to give a click feeling to each adjustment step, it is possible to naturally confirm that the adjustment has been made and to maintain this adjustment state.

(Means for Solving the Problems) Accordingly, the present invention is for a bicycle that is stretched between a speed change operation device having a positioning mechanism and a transmission that changes a chain to one sprocket of a multi-stage sprocket device. An operating rope adjusting device, comprising: an attachment body (2); and the attachment body (2).
And an adjustment body (3) for adjusting the length of the operation rope (1), which is attached so as to be axially movable by a rotating operation, and is provided between the attachment body (2) and the adjustment body (3). , The rotation of the adjusting body (3) is gradually blocked, and the adjusting body (3)
Is provided with a click imparting means for imparting a click feeling to the rotation, and the click pitch of the click imparting means is set with reference to a stable region width in which no noise is generated when the chain is engaged with the sprocket.

(Operation) When the operation rope (1) is extended and noise is generated by repeating the gear shifting operation, the adjusting body (3) is rotated once or a plurality of times by the rotation stroke corresponding to the click pitch. By doing so, the length of the operation rope (1) can be adjusted over a predetermined length corresponding to the stable region,
The chain guide of the transmission, which has moved to the unstable region due to the extension of the operating cord (1), can be accurately returned to the stable region, and the length of the operating cord can be adjusted by one adjustment operation. Since the adjustment can be performed over a predetermined length corresponding to the stable region, even if the length of the operation rope (1) is slightly increased, it is not necessary to adjust each time and the adjustment frequency can be reduced. Moreover, since a click feeling can be given for each rotation operation of the adjusting body (3), it is possible to naturally confirm that the adjustment is performed by this click feeling, and not only to enhance the sense of security, but also to adjust. The state can be maintained effectively.

(Embodiment) The embodiment shown in FIGS. 1 to 4 is an adjusting device for an operation rope (1) including an operation wire (11) and an outer cylinder (12) for guiding the wire (11), A mounting body (2) having a screw hole (21) and one end of the outer cylinder (12) are supported,
And an adjusting body (3) screwed to the mounting body (2) so as to be axially movable by a rotating operation, and a click body (3) is provided between the mounting body (2) and the adjusting body (3). 4)
And a click spring (5) for urging the click body (4) in the direction of the attachment body (2), and the click body (4) is attached to one of the facing surfaces of the click body (4) and the attachment body (2). An engaging recess (6) is provided, and an engaging projection (7) that engages with the engaging recess (6) is provided on the other side to engage the click body (4) and the click spring (5). By the concave portion (6) and the engaging projection (7), the click imparting means (A) is provided for stepwise blocking the rotation of the adjusting body (3) and giving a click feeling to the rotation of the adjusting body (3). The click pitch of the click imparting means (A), that is, the engagement interval between the engagement recess (6) and the engagement projection (7), of the chain that meshes with one sprocket of the multi-stage sprocket device. Stable region width (H) where no noise is generated when meshing with the sprocket
Was set as a guide.

In the above configuration, the attachment body (2) is, for example, the sixth
As shown in the figure, it is formed integrally with the fixing member (C) of the rear transmission (B), and the adjusting body (3) has an insertion hole (31) for the wire (11) at the center. It is formed into a cylindrical shape. A support portion (3) that supports one end of the outer tube (12) is provided on the inner circumference of the one end portion in the length direction.
2) and the rotation operation part (33) on the outer circumference,
Further, a screw part (34) is provided on the outer circumference of the other end side, and a step part (35) is provided between the screw part (34) and the rotary operation part (33).
Is provided. The screw portion (34) is provided with a rotation stop portion (36) by chamfering a part of the screw portion (34) in the axial direction.

Further, the click body (4) is formed in a disc shape having a non-circular through hole (41), and is inserted into the screw portion (34) of the adjusting body (3) so as not to be rotatable relative to the screw body (4). It is made to face one end surface of the mounting body (2), and this click body (4)
The click spring (5) is interposed between the step spring (35) and the step portion (35). Although the click body (4) is formed of a metal plate, it may be formed of a non-metal material such as synthetic resin.

When it is made of synthetic resin, for example, a metal plate having engaging projections (7) may be embedded to enhance the strength. The click body (4) has a spring receiving cylinder (42) for receiving one end of the click spring (5) as shown in FIG.
When the adjusting body (3) is rotated to the maximum in the screwing direction, the click spring (5) may enter the spring receiving cylinder (42) so that it cannot be seen from the outside. In addition, as shown in FIG. 9, in the click body (4),
A bellows-shaped elastic cylinder (43) may be integrally provided to cover the click spring (5) so that the click spring (5) cannot be seen from the outside.

The click pitch of the click imparting means (A) is
The pitch is set by the pitch of the rotation angle corresponding to the stable region width (H). Alternatively, the pitch may be set by equally dividing the rotation angle corresponding to the stable region width (H),
The pitch may be smaller or larger than the rotation angle corresponding to the stable region width (H). When the pitch is set to the small angle, it is preferable to make the angle equally divided. Incidentally, in FIGS. 1 to 4, the engaging recess (6) is shown.
Are provided at intervals of 90 degrees, and two engaging projections (7) are provided at intervals of 180 degrees.

The stable region may contact a pulley plate of a chain guide having a pulley that meshes with a sprocket of the chain, or an inner plate of the chain may contact a tooth of a sprocket that meshes with the chain, or a chain. Is a region in which the pin edge does not make a noise by contacting the teeth of the sprocket adjacent to the sprocket meshing with the chain. The stable area width (H) is determined by the types of the sprockets, chain guides and chains, the distance between the sprockets, the tooth shape of the spcket, the difference in the number of teeth between the sprockets, and the like.

The adjusting device constructed as described above is mounted on the rear transmission (B) having a chain guide (G) as shown in FIG. 6, for example. Then, an operation wire (11) having a latching body fixed at one end is inserted into the insertion hole (31) of the adjusting body (3), and the gear shifting has a positioning mechanism for setting the position of the operating lever. The end of the wire (11) is fixed to a movable member of the transmission (B) while being locked to the lever of an operating device (not shown), and one end of the outer cylinder (12) is adjusted. The body (3) is supported by the support portion (32) and the other end is supported by the fixed member of the speed change operation device, and the operation force of the operation lever is transmitted to the movable member through the wire (11). The chain guide (G) is moved in the axial direction of the constant stroke multi-stage sprocket device so that the chain is hooked on one sprocket of the multi-stage sprocket device. The chain guide (G) is shown in FIG. As the chain engages Rocket for is in a stable area.

Then, the wire (11) is extended or the outer cylinder (12) is contracted by repeated shifting operations by the operation lever, so that the relative effective length between the operation wire (11) and the outer cylinder (12). When the chain guide (G) is stopped in the unstable region (O) out of the stable region and the chain sprocket (S) is engaged with the sprocket (S), a noise is generated when the chain guide (G) becomes longer. The rotating body (3) of the adjusting body (3) is used to rotate the adjusting body (3) once or a plurality of times at a time by a constant rotation stroke corresponding to the click pitch. The rotating body moves the adjusting body (3) axially with respect to the mounting body (2), in other words, in the longitudinal direction of the operation rope (1),
At the same time, the outer cylinder (12) supported by this adjusting body (3)
1 is pressed all at once by a certain stroke in the direction of the arrow in FIG. 1 to adjust the relative effective length of the outer cylinder (12) and the operation wire (11), and the chain guide (G) moves to the fifth position.
It moves in the direction of the arrow in the figure and returns to the stable region.

In this case, the click body (4) rotates in conjunction with the rotation of the adjusting body (3), and is displaced 90 degrees after the engagement protrusion (7) is disengaged from the engagement recess (6). Engagement recess (6)
The user feels a click when engaging.

Then, when the click pitch of the click imparting means (A) is set at the pitch of the rotation angle corresponding to the stable region width (H), for example, as shown in FIG. 5, between the sprockets (S). When the stable region width (H) is 1/3 of the distance (L), the adjusting body (3)
The chain guide (G) can be accurately returned to the stable region by rotating the chain guide once, twice, or three times by a certain rotation stroke, and the chain guide has the stable region width. Since the length corresponding to (H) is moved all at once, even if the relative effective length of the operation rope (1) becomes a little longer, it is possible to increase the margin until the chain guide comes out of the stable region, and adjust accordingly. The frequency can be reduced. In addition, since a click feeling is given for each rotation operation, it is possible to naturally confirm that the adjustment is performed, and it is possible to maintain this adjustment state.

In the embodiment described above, the engaging recess (6) and the engaging protrusion (7) are provided between the click body (4) and the mounting body (2). As described above, the engaging concave portion (6) and the engaging protrusion (7) may be provided between the adjusting body (3) and the click body (4). In this case, for example, one end of the click spring (5) is hooked on the mounting body (2),
Also, the other end is hooked on the click body (4) to prevent the click body (4) from rotating together with the adjusting body (3).

Further, the click giving means (A) may be configured as shown in FIGS.

Therefore, in the structure shown in FIGS. 10 and 11, an intermediate shaft portion (37) having a rotation stopping protrusion is provided between the rotation operating portion (33) and the screw portion (34) of the adjusting body (3). And supports the click body (4) on the intermediate shaft portion (37) such that the click body (4) cannot rotate relative to the intermediate shaft portion (37) and can move in the axial direction, and the screw body is attached to one end side of the screw hole (21) in the mounting body (2). A bore (22) having a diameter larger than that of the hole (21) is provided, and a click spring (5) having a concave cross section is provided in the bore (22), and the click spring (5) and the click body (4). 2) is provided with an engaging recess (6) on one side thereof and an engaging projection (7) on the other side thereof.

In addition, as shown in FIGS. 12 and 13, the threaded portion (34) of the adjusting body (3) is provided with an engaging recess (6) extending in the axial direction, and the screw hole (21) of the mounting body (2) is provided. ) Is provided with a concave portion (23) in the radial direction, and a click body (4) and a click spring (5) made of a ball are provided in the concave portion (23), and the click body (4) is engaged with the engagement body. It is engaged with the recess (6).

Also, the one shown in FIG. 14 is the threaded portion (3
An engaging recess (6) extending in the axial direction is provided in the mounting member (2), and a click body (4) having elasticity such as rubber is provided in the recessed portion (23) of the mounting body (2). 3)
The click body (4) is elastically deformed by the rotating operation.

In addition, as shown in FIG. 15, the engaging portion (61) is obtained by chamfering the screw portion (34) of the adjusting body (3) in the axial direction.
And the recessed portion (23) of the mounting body (2),
A click body (4) having elasticity and a bending absorbing portion (44) for absorbing bending is provided.

Also, in the structure shown in FIGS. 16 and 17, the threaded portion (34) of the adjusting body (3) is provided with the engaging portion (61), and the mounting body (2) is formed by a pair of mounting pieces. And elastic U
A character-shaped click body (4) is arranged between the attachment pieces, the inner surface portion of the click body (4) is fitted into the screw portion (34), and the click body (4) is rotated by rotating the adjustment body (3). ) Is elastically deformed.

Also, in the structure shown in FIGS. 18 and 19, the engaging portion (61) is provided on the screw portion (34) of the adjusting body (3), and the elastic U-shaped click body (4) is attached to the screw portion (34). The click body (4) is fitted into the part (34) so that the open side end of the click body (4) is brought into contact with the one end side end surface (2a) of the mounting body (2) to adjust the click body (4). It was designed to prevent co-rotation with. In addition, in the case of FIGS. 16 to 19, if the click body (4) is made detachable, the length of the operation rope (1) is adjusted by removing the click body (4) without giving a click feeling. You can do it.

Further, in the structure shown in FIGS. 20 and 21, the mounting body (2) is made of an elastic material such as synthetic resin, and the mounting body (2) is provided with a non-circular screw hole (21). At the same time, the screw portion (34) of the adjusting body (3) is formed into a non-circular shape, and the screw portion (34) is forcibly screwed into the screw hole (21).
The screw hole (21) is elastically deformed by rotating the adjusting body (3). In this case, the screw portion of the screw hole (21) may be formed by forcibly screwing the screw portion (34).

In addition, as shown in FIGS. 22 and 23, the adjusting body (3) is a screw body (3a) having the supporting portion (32) and the screw portion (34).
And an operating body (3b) having a rotation operating section (33), and a through hole (24) having a rotation stopping projection is provided in the mounting body (2) to provide the screw section (34). Through the through hole (2
4) is axially movable and non-rotatably inserted, while the operating body (3b) is screwed into the screw portion (34) only so as to be rotatable, and the operating body (3b) and the mounting body are attached. (2) An engaging recess (6) is provided on one side, and an engaging protrusion (7) is provided on the other side, and the screw body (3a) is axially moved by rotating the operating body (3b). It is designed to move in stages.

Moreover, the one shown in FIGS. 24 and 25 is the end face (2
b) is formed in an arc shape, and the mounting body (2) is provided with a through hole (24) having a rotation stopping portion penetrating in the radial direction, while the adjusting body (3) is fixed to the supporting portion (32). And a screw body (3a) having a screw part (34), a rotary operation part (33) and a screw hole (3
8) and an operating body (3b) having the same, and the threaded portion (34) of the screw body (3a) is inserted into the through hole (24) so as to be axially movable and non-rotatable. At the same time, the operating body (3b) is screwed into the screw portion (34) only so as to be rotatable, and the operating body (3b) has an arcuate engagement with the end surface (2b) of the mounting body (2). A fitting recess (6) is provided, and the operating body (3
The engaging recess (6) and the end surface (2b) by the rotation operation of b).
The screw body (3a) is configured to be moved stepwise in the axial direction while a click feeling is produced between the screw body (3a) and the screw body (3a).

Further, in the embodiment described above, the adjusting body (3) having the screw portion (34) is used, but the screw portion (34) is not always necessary. In this case, for example, as shown in FIGS. 26 and 27, the mounting body (2) is provided with a screw hole (21) and the adjusting body (3) is provided.
An engaging projection (7) protruding into the thread groove portion (21a) of the screw hole (21), and the thread groove of the engagement projection (7) is rotated by rotating the adjusting body (3). The engagement position with the portion (21a) is changed.

Further, in the embodiment described above, the operating rope (1) is supported on the adjusting body (3), but the operating rope is also provided on the supporting body (8) provided separately from the adjusting body (3) as shown in FIGS. 28 and 29. For example, the operation wire (11) of (1) is supported, and the support body (8) is operated by the rotation operation of the adjustment body (3) to adjust the length of the operation rope (1). Good.

That is, what is shown in FIGS. 28 and 29 is a fixing member (C),
A pair of link members (D) pivotally supported by the fixing member (C)
The operation rope (1) is supported separately from a link mechanism composed of (E) and a movable member (not shown) having a chain guide that pivotally supports the free ends of the link members (D) and (E). A supporter (8) for pivoting the support member (8) to the fixing member (C), and a saver spring for urging the support member (8) in one direction between the fixing member (C) and the support member (8). (F) is provided, and even when a resistance greater than the gear shift resistance is applied to the chain guide, the saver spring (F) is bent to swing the support body (8) to perform a gear shift operation. The attachment body (2) is provided on one of the link members (D) and (E), and the attachment body (2) is provided on the transmission body with a saver mechanism. (2)
An adjusting body (3) consisting of a rotation operating part (33) and a screw part (34) is attached to the screw by screwing, and the engaging part (61) is provided on the screw part (34) of the adjusting body (3). At the same time, the elastic U-shaped click body (4) is removably fitted into the screw part (34), and the open end of the click body (4) is brought into contact with the side surface of the link member (D). The click body (4) and the adjusting body (3) are prevented from co-rotating with each other. In this case, the click giving means (A)
It is needless to say that the configuration of is not limited to the illustrated one.

Further, in the embodiment described above, the one in which the relative effective length of the operation rope (1) composed of the operation wire (11) and the outer cylinder (12) is adjusted has been described. It is also possible to adjust the length of the operation rope composed of only the chisel. In this case, for example, the attachment body (2) is provided on the movable side member of the transmission (B) or the operation lever of the gear shift operation device, and the support portion (32) of the adjustment body (3) is provided.
Further, the hooking body fixed to one end of the operation wire (11) is hooked.

Further, the adjusting device of the present invention may be mounted not only on the fixed member (C) of the transmission but also on the link part or the movable part of the transmission. It may be attached to the frame of a bicycle.

(Advantages of the Invention) As described above, the present invention comprises the mounting body (2) and the adjusting body (3) which is mounted on the mounting body (2) so as to be axially movable by a rotating operation. And adjuster (3)
And the rotation of the adjusting body (3) is stepwise blocked between
Since a click imparting means for imparting a click feeling to the rotation of the adjusting body (3) is provided, the click pitch of the click imparting means is set with reference to a stable region width in which no noise is generated when the chain is engaged with the sprocket. By rotating the adjusting body (3) once or a plurality of times by the rotating stroke corresponding to the click pitch,
Since the length of the operation rope (1) can be adjusted over a predetermined length corresponding to the stable area, the chain guide of the transmission moved to the unstable area by the extension of the operation rope (1) can be accurately adjusted to the stable area. Since the length of the operation rope can be adjusted over a predetermined length corresponding to the stable region by one adjustment operation, the operation rope (1)
Even if the length of is a little crazy, there is no need to adjust each time,
The adjustment frequency can be reduced accordingly.

In addition, since it is possible to give a click feeling for each one-time rotation operation of the adjusting body (3), it is possible to naturally confirm that the adjustment is performed, and not only that, a sense of security can be enhanced. The adjusted state can be maintained.

Further, since the adjusting body (3) has a structure in which it is moved stepwise in the axial direction by a rotating operation, even if the extension amount of the operating rope (1) is large, it is possible to adjust by a few rotating operations. Can be done.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a side view of only a mounting body, and FIG. FIG. 5 is a perspective view, FIG. 5 is an explanatory view of a stable region, FIG. 6 is an explanatory view showing a usage state,
7 to 29 are explanatory views showing another embodiment. (1) …… Operating cable (2) …… Mounting body (3) …… Adjusting body

Claims (1)

[Claims] 1. An adjusting device for a bicycle operation line, which is stretched between a speed change operation device having a positioning mechanism and a transmission for changing a chain to one sprocket of a multi-stage sprocket device, the adjustment device comprising: 2) and an adjusting body (3) which is attached to the mounting body (2) so as to be axially movable by a rotating operation and which adjusts the length of the operation rope (1). These mounting bodies (2) And a adjusting body (3) are provided between the adjusting body (3) and the adjusting body (3) in a stepwise manner to provide a click feeling to the rotating body of the adjusting body (3). An adjustment device for a bicycle operation rope is characterized in that the click pitch of is set with reference to a width of a stable region in which noise does not occur when the chain is engaged with the sprocket.