JP2007196698A - Cable fixing device for bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable fixing device for a bicycle capable of speedily connecting and disconnecting a cable for the bicycle to and from a part for the bicycle. <P>SOLUTION: An inner engaging part 64 is furnished with a supporting member 71, a cable fixing member 72, an operation member 73 and a cam mechanism 74. An inner cable 13a is arranged on the supporting member 71. The cable fixing member is installed on the supporting member free to relatively move. The operation member is a member installed on the supporting member revolvably around an axis of revolution 83. The cam mechanism is provided on the operation member and switches the cable fixing member into a cable fixing state and a cable releasing state by selectively moving the cable fixing member by revolving motion of the operation member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cable fixing device, and more particularly to a bicycle cable fixing device for fixing a bicycle cable to bicycle parts such as front and rear derailleurs and brake devices.

  Bicycle components such as bicycle transmissions and brake devices are connected to their operation devices by Bowden-type control cables having an outer casing and an inner cable. For this reason, the bicycle component is provided with a cable fixing device for fixing the inner cable (an example of the bicycle cable) of the control cable. The outer casing is locked to a fixed portion of the bicycle component or an outer locking portion provided on the bicycle frame.

A conventional cable fixing device has a fixing bolt, for example, in the form of a hexagon socket head bolt, which is screwed into a bicycle part, and a washer member attached to the fixing bolt. When fixing the inner cable to the bicycle component, the inner cable is fixed to the bicycle component by sandwiching the tip of the inner cable between the washer member and the bicycle component and tightening the washer member with a fixing bolt. . For example, in the case of a derailleur, an inner cable is fixed to the link of the derailleur (see, for example, Patent Document 1). In the case of a brake, the inner cable is fixed to the brake arm.
JP 2004-148983 A (B4295 of your company)

  The inner cable may be stretched as it is used. When the inner cable is extended in this way, the inner cable may sag and shifting may not be performed properly, or the brake shoe may move to shift the braking timing of the brake. In this case, it may be necessary to attach and detach the inner cable again according to the elongation of the inner cable. In some cases, the inner cable may be reattached or removed by cutting the inner cable or exchanging wheels.

  Thus, when the inner cable is reattached / reattached with the cable fixing device, the inner cable is fixed with the fixing bolt in the conventional cable fixing device. Therefore, a tool such as an Allen key or a screwdriver is used to attach / detach the inner cable. It is necessary to turn the fixing bolt with the control cable.

  An object of the present invention is to enable a bicycle cable to be quickly attached to and detached from a bicycle component in a bicycle cable fixing device.

  A bicycle cable fixing device according to a first aspect includes a support member, a cable fixing member, an operation member, and a cam mechanism. The support member is a member on which the bicycle cable is disposed. The cable fixing member is a member attached to the support member so as to be relatively movable. The operation member is a member that is mounted on the support member so as to be rotatable about a rotation axis. The cam mechanism is provided on at least one of the cable fixing member and the operation member, and the cable fixing member is selectively moved by rotating the operation member to switch the cable fixing member between the cable fixing state and the cable opening state. Mechanism.

  In this cable fixing device, when the bicycle cable is arranged on the support member, the operation member is operated to rotate in one direction around the rotation axis. Then, the cam fixing mechanism moves the cable fixing member relative to the support member so as to be in the cable fixing state, and the bicycle cable is sandwiched between the support member and the cable fixing member to fix the bicycle cable. Further, when the operation member is rotated in the other direction in this state, the cable fixing member is opened to the support member by the cam mechanism, and the bicycle cable is sandwiched between the support member and the cable fixing member. Is opened and the bicycle cable can be removed. Here, the cam mechanism can be operated and the bicycle cable can be fixed and released simply by rotating the operation member, so that the bicycle cable can be quickly attached and detached.

  A bicycle cable fixing device according to a second aspect of the present invention is the device according to the first aspect, wherein the cam mechanism is provided on the operating member, and the cam for moving the cable fixing member in a direction approaching the support member by rotation, and the cable fixing And a cam receiving portion that is provided on the member and engages with the cam. In this case, since the cam is provided on the operating member that rotates, the moving direction of the cam is not limited, and the degree of freedom in design increases.

  The bicycle cable fixing device according to a third aspect of the present invention is the device according to the first or second aspect, wherein the rotation shaft is disposed substantially parallel to a placement surface on which the bicycle cable is disposed on the support member. In this case, since the rotation shaft is arranged in parallel with the arrangement surface, the shape of the cam for moving the cable fixing member in the direction in contact with and away from the arrangement surface is simplified.

  A bicycle cable fixing device according to a fourth aspect of the present invention is the device according to the third aspect, wherein the support member is disposed substantially orthogonal to the arrangement surface and is movable relative to the arrangement surface in a direction of contact with and away from the arrangement surface. The rotation shaft is mounted on the support shaft in a direction substantially perpendicular to the support shaft. In this case, since the support shaft orthogonal to the arrangement surface is provided and the cable fixing member is supported by one support shaft so as to be relatively movable, and the rotation shaft is supported, the cable fixing member and the rotation shaft are supported. Can be supported with a simple structure, and the weight of the apparatus can be reduced.

  According to a fifth aspect of the present invention, there is provided the bicycle cable fixing device according to the fourth aspect, wherein the cable fixing member is formed by being bent from both sides of the opposing surface that can face the arrangement surface, A connecting part formed with a long hole through which the rotation shaft can penetrate so as to be relatively movable in the approaching and separating direction, and provided on the opposing surface, the support shaft can be penetrated, and is supported movably on the support shaft. And a support hole. In this case, since the cable fixing member is connected to the rotating shaft, the cable fixing member is prevented from rotating even if the cable fixing member is supported by the support shaft.

  A bicycle cable fixing device according to a sixth aspect of the present invention is the device according to the fourth or fifth aspect, wherein the cam is disposed on the operating member so as to be rotatable about the rotation axis, and the cam of the rotation axis is changed according to the rotation phase. The outer peripheral surface has a cam surface that varies in distance from the shaft core, and the cam receiving portion is disposed on the cable fixing member so as to be in contact with the cam surface. In this case, when the cam is rotated by the operation member, the distance from the axis of the rotation axis of the cam surface varies, so that the cable fixing member can be easily moved.

  According to the present invention, since the cam mechanism operates and the bicycle cable can be fixed / released simply by rotating the operation member, the bicycle cable can be quickly attached and detached.

<First Embodiment>
〔overall structure〕
FIG. 1 shows a bicycle equipped with an embodiment of the present invention. The bicycle includes a frame 1 having a frame body 2 and a front fork 3, a handle 4, a front wheel 5f and a rear wheel 5r, a drive unit 7 for transmitting rotation of a pedal 6 to the rear wheel 5r, and front and rear brake devices. 8f and 8r.

  The frame body 2 includes a front triangular portion having a head pipe 15, an upper tube 16, a lower tube 17, and a seat tube 18 on which a front fork 3 is pivotally attached to a front portion so as to be inclined obliquely forward. This is a known diamond-shaped frame having a rear triangular portion having a sheet stay 19 and a chain stay 20.

  A seat post 9a to which a saddle 9 is attached is attached to the seat tube 18 so that the vertical position can be adjusted. A front wheel 5 f is attached to the lower end of the front fork 3. The drive unit 7 is provided at the lower end of the seat tube 18, and the rear wheel 5 r is attached to the rear end of the chain stay 20. The rear ends of the chain stay 20 and the sheet stay 19 of the frame body 2 are connected by a rear claw portion 30 as shown in FIGS. The rear claw portion 30 is formed with a mounting groove 30a for mounting the hub shaft 29a of the rear hub 29 and a screw hole 30b for mounting a normal rear derailleur. The mounting groove 30a is generally formed obliquely upward from below the rear claw portion 30. Generally, the screw hole 30b is formed at the end of the protruding portion that protrudes obliquely downward at the rear portion of the rear claw portion 30. It is to be noted that a frame structure is known in which the rear claw portion 30 is formed to be less rigid than other portions in order to prevent damage or deformation of other portions of the frame 1 and can be replaced when damaged or deformed. Yes.

  The handle portion 4 includes a handle stem 21a and a handle bar 21b fitted and fixed at the upper end of the handle stem 21a. The handle stem 21 a is fitted and fixed to the upper part of the front fork 3. The handle bar 21 b includes a pair of left and right grips 22, a pair of left and right shifting operation units 23, and a pair of left and right brake operation units 24.

  The drive unit 7 includes a chain 10 and front and rear exterior transmissions 11 and 12 on which the chain 10 is bridged. The front exterior transmission 11 includes a gear crank 25 provided at the lower portion (hanger portion) of the seat tube 18 and having, for example, three sprockets having different numbers of teeth, and a front derailleur 26. The front derailleur 26 is provided on the gear crank 25 and hangs the chain 10 on one of the three sprockets according to the operation of the speed change operation unit 23.

  As shown in FIGS. 2 and 3, the rear exterior transmission device 12 includes, for example, eight sprockets G <b> 1 to G <b> 8 mounted on a rear derailleur 27 and a rear hub 29 (see FIG. 3) of the rear wheel 5 r with different numbers of teeth. And a multi-stage gear 28 having the same. The rear derailleur 27 hangs the chain 10 on one of the sprockets G <b> 1 to G <b> 8 according to the operation of the speed change operation unit 23 connected by the speed change cable 13.

[Configuration of rear derailleur]
As shown in FIGS. 2 and 3, the rear derailleur 27 is detachably attached to a rear claw portion 30 that connects the chain stay 20 and the seat stay 19 of the frame body 2 at the rear end. The rear derailleur 27 includes a bracket 31 as a mounting member fixed to the rear claw portion 30, a base member 32 swingably mounted on the bracket 31, a chain guide 33, a movable member 34, a link mechanism 35, It has.

  The bracket 31 is detachably fixed together with the hub shaft 29a in the mounting groove 30a of the rear claw portion 30 of the frame rear end portion. The bracket 31 has a first bracket body 40 and a second bracket body 41 fastened to the first bracket body 40 with screws. The upper portions of the first and second bracket bodies 40 and 41 are disposed in close contact with each other, and the lower portions are disposed at intervals. A mounting shaft 50 for mounting the base member 32 in a swingable manner is mounted below the first and second brackets 40 and 41.

  A base end of the base member 32 is supported by the bracket 31 so as to be swingable, and a pair of link support portions 32a for mounting the link mechanism 35 is formed at the front end. In addition, an outer locking portion 65 that locks the outer casing 13 b of the Bowden transmission cable 13 is provided at an intermediate portion of the base member 32. The base member 32 is urged clockwise in FIG. 2 by a torsion coil spring 51 disposed on the outer peripheral side of the mounting shaft 50.

  As shown in FIG. 2, the chain guide 33 guides the chain 10 to one of the plurality of sprockets G1 to G8. The chain guide 33 has a pair of pulleys 33a and 33b rotatably arranged at both ends. By spanning the chain 10 between the pulleys 33a and 33b, the chain 10 can be smoothly guided to one of the sprockets G1 to G8.

  The movable member 34 connects the chain guide 33 so as to be swingable about an axis substantially parallel to the hub shaft 29 a of the rear hub 29. The movable member 34 is formed with a pair of link support portions 34 a connected to the link mechanism 35. A torsion coil spring 38 is mounted between the movable member 34 and the chain guide 33. The torsion coil spring 38 causes the chain guide 33 to rotate clockwise as viewed from the outside (the direction of arrow C in FIG. 2). Is being energized. By this and the base member 32 being urged clockwise, tension is applied to the chain 10 so that the chain 10 is difficult to drop off from the sprockets G1 to G8. Further, since the base member 32 and the chain guide 33 are swung during the speed change operation, the movement trajectory of the chain guide 33 is easy to follow along the sprockets G1 to G8, and the chain 10 is smoothly guided to one of the sprockets G1 to G8. be able to.

  The link mechanism 35 is a mechanism that couples the movable member 34 to the base member 32 so that the movable member 34 moves relative to the base member 32. As shown in FIG. 2, the link mechanism 35 is disposed substantially parallel to the first link member 60 and the first link member 60 connected to both ends of the link support portions 32 a and 34 a of the base member 32 and the movable member 34. The second link member 61 is provided. Both link members 60 and 61 are swingably mounted at both ends on four link shafts 63 mounted on the link support portions 32a and 34a. The link members 60 and 61 are biased toward the sprocket G8 on the large diameter side by a coil spring 62 connected to two link shafts 66 arranged diagonally. An inner locking portion (an example of a cable fixing device) 64 that locks an inner cable (an example of a bicycle cable) 13a of the transmission cable 13 is provided on a side surface 60a (FIG. 3) near the sprocket of the second link member 61. It has been.

[Configuration of inner locking part]
As shown in FIGS. 4 to 9, the inner locking portion 64 is mounted on the support member 71 provided on the side surface 60 a of the first link member 60 and the inner cable 13 a is disposed, and is movably mounted on the support member 71. A cable fixing member 72; an operation member 73 rotatably mounted on the support member 71; and a cam mechanism 74 provided on at least one of the operation member 73 and the cable fixing member 72.

  The support member 71 is provided on the side surface 60 a of the first link member 60, and an arrangement portion 81 in which a flat arrangement surface 81 a on which the inner cable 13 a is arranged is formed, and a support shaft 82 erected on the arrangement portion 81. And a rotation shaft 83 attached to the support shaft 82. The arrangement portion 81 is formed so as to protrude in a trapezoidal shape integrally or separately from the side surface 60 a of the first link member 60. The support shaft 82 is fixed to the arrangement portion 81 by an appropriate fixing method such as caulking or screwing, and is arranged substantially orthogonal to the arrangement surface 81 a of the arrangement portion 81. A through hole (FIG. 6 and FIG. 7) 82 a through which the rotation shaft 83 is supported is formed in the intermediate portion of the support portion 82 along the radial direction. The rotation shaft 83 is preferably a shaft member having a large-diameter flange 83 a at the base end, and is disposed substantially orthogonal to the axial direction of the support shaft 82. The rotation shaft 83 is supported by the through hole 82 a of the support shaft 82, and is prevented from coming off by a retaining ring 85 attached to the tip of the rotation shaft 83.

  The cable fixing member 72 includes a facing portion 72b having a facing surface 72a disposed substantially parallel to the placement surface 81a, and a pair of connecting portions 72c formed by bending from both sides of the facing portion 72b. It is a U-shaped member. The opposing portion 72b is provided to fix the inner cable 13a between the opposing portion 72b and the inner cable 13a is sandwiched between the opposing surface 72a and the arranging surface 81a so that the inner cable 13a is locked to the inner side. It is fixed to the part 64. A circular support hole 72d through which the support shaft 82 passes is formed in the facing portion 72b of the cable fixing member 72, and the cable fixing member 72 comes into contact with and separates from the arrangement portion 81 with respect to the support shaft 82 through this support hole 72d. It is supported to be movable in the direction. A flat surface (surface on the upper side of FIGS. 4 to 9) opposite to the facing surface 72 a of the facing portion 72 b constitutes a cam receiving portion 74 c described later of the cam mechanism 74.

  The cable fixing member 72 is connected to the rotating shaft 83 by a pair of connecting portions 72c and 72c. The pair of connecting portions 72c and 72c are respectively formed with long holes 72e that are long in the direction of contacting and separating from the arrangement surface 81a. The long hole 72e has a width through which the rotation shaft 83 can pass. The long hole 72e is provided so that the cable fixing member 72 can be moved in a direction in which the cable fixing member 72 is in contact with and away from the arrangement surface 81a.

  The operation member 73 includes a mounting portion 73a that is rotatably mounted on the rotating shaft 83 and a handle portion 73b that is fixed to the outer peripheral surface of the mounting portion 73a and extends outward in the radial direction. . The mounting portion 73a is provided with a cam 74a of the cam mechanism 74. The cam 74a has a cam surface 74b whose distance from the rotation center of the rotation shaft 83 changes according to the rotation phase. Specifically, the mounting portion 73a is, for example, a disk-shaped member, and a cam hole 74d through which the rotation shaft 83 passes is formed at a position eccentric from the center thereof. The outer peripheral surface of the mounting portion 73a functions as the cam surface 74b. A locking hole 73c is formed in the handle portion 73b along the axial direction from the distal end surface. The locking hole 73c is provided in order to increase the torque acting on the operation member 73 by attaching a rod-shaped member (for example, an Allen key) or the like when performing a cable fixing operation or performing an opening operation.

  The cam mechanism 74 selectively moves the cable fixing member 72 by the turning operation of the operation member 73, and the cable fixing member 72 is shown in the cable fixing state shown in FIGS. It switches to the cable open state. The cam mechanism 74 includes a cam 74a having the above-described cam surface 74b configured on the outer peripheral surface of the operation member 73, and a cam receiving portion 74c that engages with the cam 74a. As described above, the cam 74 a is provided in the mounting portion 73 a of the operation member 73, and the cam receiving portion 74 c is provided in the facing portion 72 b of the cable fixing member 72. In this embodiment, the cam 74a is comprised by the eccentric disc. For this reason, the stroke of the cam 74a (difference in the change in the distance from the rotation center) is maximized when rotated 180 degrees, but the inner cable is rotated with a rotation amount of about 100 degrees in consideration of ease of operation. The position of the rotation shaft 83 is determined so that 13a can be fixed. These configurations can be arbitrarily set depending on the cam shape.

[Cable attachment / detachment work]
Hereinafter, a procedure for attaching and detaching the inner cable 13a with respect to the inner locking portion 64 will be described.

  When the inner cable 13a is newly fixed to the rear derailleur 27, first, the inner cable having one end connected to the speed change operation portion 23 is inserted through the inside of the plurality of outer casings 13b arranged at the main points of the frame. The outer casing 13b closest to the rear derailleur 27 is engaged at both ends with an outer locking portion 20a fixed to the rear end side of the chain stay 20 of the frame body 2 and an outer locking portion 65 of the rear derailleur 27. As shown in FIG. 2, they are arranged in a curved manner. Then, the inner cable 13a is taken out from the outer locking portion 65.

  In the following description, the procedure of the operation of fixing the removed inner cable 13a again is the same. The distal end portion of the inner cable 13 a is disposed between the arrangement surface 81 a of the arrangement portion 81 of the support member 71 and the opposing surface 72 a of the cable fixing member 72. At this time, as shown in FIGS. 4, 6, and 8, the handle 73 b of the operation member 73 is arranged substantially parallel to the support shaft 82. The length of the long hole 72e is set so that the gap between the arrangement surface 81a and the facing surface 72a at this time is larger than the diameter of the inner cable 13a. For this reason, the cable fixing member 72 is lifted with one hand to form a gap between the placement portion 81 and the inner cable 13a is placed to release the hand. Then, it stops at the position where the facing surface 72a of the cable fixing member 72 is in contact with the outer peripheral portion of the inner cable 13a. This state is a cable open state.

  Then, a rod-shaped member such as an Allen key is attached to the handle portion 73b of the operation member 73, or the handle portion 73b is pinched by hand and rotated about 100 degrees clockwise in FIGS. Then, the distance from the rotation center of the rotation shaft 83 of the cam surface 74b of the cam 74a of the cam mechanism 74 is gradually increased. When the rotation shaft 83 comes into contact with the upper portion of the elongated hole 72e in FIG. 9, the cam receiving portion 74c in the cable fixing member 72 is pressed against the cam surface 74b. When the operation member 73 is rotated to the position shown in FIG. 9, the state is switched to the cable fixing state. In this cable fixing state, the inner cable 13a is pressed and deformed by the facing surface 72a of the cable fixing member 72, and is firmly fixed between the facing surface 72a and the arrangement surface 81a. In this embodiment, in the cable fixed state, the distance from the rotation center to the cam surface 74b is slightly shorter than the maximum distance. As a result, even if a force is applied to the operation member 73 from the outside, it is difficult to return to the cable open state. Of course, the cam shape may be set so that the distance from the rotation center to the cam surface 74b becomes the maximum distance in the cable fixed state.

  When removing the inner cable 13a, an operation opposite to the above operation may be performed. That is, the handle 73b of the operation member 73 may be rotated counterclockwise in FIG. 9 from the cable fixed state shown in FIGS. 5, 7, and 9 to the cable open state shown in FIGS. Thereby, the inner cable 13a can be easily removed.

  Here, since the cam mechanism 74 operates and the inner cable 13a can be fixed and released simply by rotating the operation member 73, the inner cable 13a can be quickly attached and detached.

Second Embodiment
In the first embodiment, the cable fixing member 72 is configured by a U-shaped member, but may be configured by a flat plate-shaped member. In FIG. 10, the inner locking portion 164 as the cable fixing device according to the second embodiment includes a support member 171, a cable fixing member 172, an operation member 173, and a cam mechanism 174. The support member 171 includes an arrangement portion 181 having a flat arrangement surface 181 a, a support shaft 182 erected on the arrangement portion 181, and a rotation shaft 183 attached to the support shaft 182. The structure of the support member 171 is substantially the same as that of the first embodiment except that the support shaft 182 is not a columnar member but a plate-like member. The support shaft 182 is formed with a through hole 182a through which the rotation shaft 183 passes.

  The cable fixing member 172 is, for example, a disk-shaped member having a rectangular support hole 172d formed in the center. The lower surface of the cable fixing member 172 has a facing surface 172b facing the arrangement surface 181a. The inner cable 13a is fixed between the arrangement surface 181a and the facing surface 172b.

  The operation member 173 includes a mounting portion 173a having a U-shaped cross section disposed on both sides of the support shaft 182 and a handle portion 173b extending from the mounting portion 173a in the radial direction of the rotation shaft. The mounting portion 173a is disposed so as to sandwich the support shaft 182. The mounting portion 173a has a cam hole 174d in which the rotation shaft 183 is mounted. Similar to the first embodiment, the mounting portion 173 a of the operation member 173 is provided with a cam 174 a of the cam mechanism 174. The cam surface 174b of the cam 174a is formed on the end surface of the mounting portion 173a that contacts the cable fixing member 172 when the operation member 173 rotates, as in the first embodiment. Further, the cam receiving portion 174c is configured by a flat surface (upper surface in FIG. 10) opposite to the facing surface 172b of the cable fixing member 172.

  Even in the second embodiment having such a configuration, the cam mechanism 174 is operated by the rotation of the operation member 173 and the cable fixing member 172 is switched from the cable open state to the cable fixed state, so that the inner cable 13a can be quickly fixed. Can be unlocked. Note that a passage hole through which the inner cable 13a can pass as shown by a two-dot chain line may be provided at the base portion of the support shaft 182, and the inner cable 13a may be passed through the passage hole.

<Third Embodiment>
In the first and second embodiments, the support member is provided with a support shaft, and the rotation shafts 83 and 183 are disposed substantially in parallel with the arrangement surfaces 81a and 181a. The form is not limited. In FIG. 11, the inner locking portion 264 as the cable fixing device according to the third embodiment includes a support member 271, a cable fixing member 272, an operation member 273, and a cam mechanism 274. It has a support member 271, an arrangement part 281 having a flat arrangement surface 281 a, and a rotating shaft 283 standing on the arrangement part 281. In the third embodiment, a support shaft is not provided on the arrangement portion 281 of the support member 271, and the rotation shaft 283 is erected. Therefore, the rotation shaft 283 is disposed substantially orthogonal to the arrangement surface 281a. Since the configuration of the support member 271 is the same as that of the second embodiment except that the support shaft is not provided, the description thereof is omitted.

  The cable fixing member 272 is a disk-shaped member having a facing surface 272b facing the arrangement surface 281a. The cable fixing member 272 is formed with a support hole 272d guided by the rotation shaft 283 at the center. A cam receiving portion 274c of the cam mechanism 274 is formed on a surface opposite to the facing surface 272b of the cable fixing member 272 (upper surface in FIG. 11). The cam receiving portion 274c is configured by an inclined surface that is inclined in the circumferential direction (the direction around the rotation shaft 283).

  The operation member 273 includes a mounting portion 273a that is rotatably mounted on the rotating shaft 283, and a handle portion 273b that extends in the radial direction of the mounting portion 273a. A cam 274a of the cam mechanism 274 is formed on the surface of the mounting portion 273a facing the cable fixing member 272. The operation member 273 is prevented from coming off by a disk-shaped fixing plate 285 fixed to the upper end of the rotation shaft 283 by a screw 286.

  The cam surface 274b of the cam 274a of the cam mechanism 274 is configured by, for example, three inclined cams arranged at equal intervals in the circumferential direction. Specifically, as shown schematically in a straight line in FIG. 12, for example, three slope cams having slope portions 275a at intervals of 120 degrees and flat portions 275b and 275c formed on both sides thereof. 275. The cam receiving portion 274c provided on the cable fixing member 272 side has a similar shape, and includes a slope cam 276 having three slope portions 276a and flat portions 276b and 276c arranged on both sides thereof.

  In the inner locking portion 264 of the third embodiment having such a configuration, when the operation member 273 is rotated, the cam 274a and the cam receiving portion 274c of the cam mechanism 274 are brought into the cable open state shown in FIG. The cable is fixed as shown in FIG. 12C via the intermediate state shown in FIG. The two slope cams 275 and 276 are almost in contact with each other in the cable open state, only the slope portions 275a and 276a are in contact in the intermediate state, and only the flat portions 275c and 276c are in contact in the cable fixed state. By such an operation, the cable fixing member 272 moves toward the arrangement surface 281a.

  Even in the third embodiment having such a configuration, the cam mechanism 274 is operated by the rotation of the operation member 273, and the cable fixing member 272 is switched from the cable open state to the cable fixed state, so that the inner cable 13a can be quickly fixed. Can be unlocked. In addition, a passage hole through which the inner cable 13a can pass as shown by a two-dot chain line may be provided at the root portion of the rotation shaft 283, and the inner cable 13a may be passed through the passage hole.

[Other Embodiments]
(A) In the three embodiments, the present invention has been described by taking the inner locking portion for fixing the inner cable 13a of the transmission cable 13 attached to the rear derailleur 27 as an example. However, the cable fixing device of the present invention is limited to this. Not. For example, an inner locking portion for fixing an inner cable of a Bowden transmission cable provided in a transmission such as a front derailleur or an internal transmission hub, or an inner locking for fixing an inner cable of a Bowden transmission cable provided in a brake device. The present invention can also be applied to the section. In the case of a brake device, particularly a brake device mounted on a mountain bike with thick tires, it is necessary to attach and detach a braking cable when exchanging wheels. Therefore, the present invention is also effective in such a case.

  (B) In the first embodiment, the cam 74a of the cam mechanism 74 is realized by eccentrically supporting the circular mounting portion 73a to facilitate the formation of the cam 74a. The present invention is not limited to the embodiment, and any shape may be used as long as the distance from the rotation center is changed by the rotation of the operation member.

  (C) In the third embodiment, the cam 274a and the cam receiving portion 274c are configured by the two inclined cams 275 and 276, but the cam receiving portion may be configured by a pin that contacts the inclined cam. Further, a cam may be provided on the cable fixing member, and a cam receiver may be provided on the operation member.

1 is a side view of a bicycle adopting an embodiment of the present invention. 1 is a front view of a rear derailleur according to an embodiment of the present invention. FIG. The perspective view which shows the inner latching | locking part of a cable open state. The perspective view which shows the inner latching | locking part of a cable fixing state. VI-VI sectional drawing of FIG. 4 which shows a cable open state. VII-VII sectional drawing of FIG. 5 which shows a cable fixing state. VIII-VIII sectional drawing of FIG. 6 which shows a cable open state. IV-IV sectional drawing of FIG. 7 which shows a cable fixing state. The figure equivalent to FIG. 6 of 2nd Embodiment. The figure equivalent to FIG. 6 of 3rd Embodiment. The schematic diagram which shows operation | movement of the cam mechanism of 3rd Embodiment.

Explanation of symbols

13a Inner cable (an example of a bicycle cable)
64 Inner locking part (an example of a cable fixing device)
71,171,271 Support member 72,172,272 Cable fixing member 72a Opposing part 72b, 172b, 272b Opposing surface 72c Connecting part 72d, 172d Support hole 73,173,273 Operating member 74,174,274 Cam mechanism 74a, 174a , 274a Cam 74b, 174b, 274b Cam surface 74c, 174c, 274c Cam receiving portion 74d Long hole 81, 81, 281 Arrangement portion 81a, 181a, 281a Arrangement surface 82, 182 Support shaft 83, 183, 283 Rotation shaft

Claims (6)

A cable fixing device for a bicycle,
A support member on which the bicycle cable is disposed;
A cable fixing member mounted on the support member so as to be relatively movable;
An operation member mounted on the support member so as to be rotatable about a rotation axis;
The cable fixing member is provided in at least one of the cable fixing member and the operation member, and the cable fixing member is selectively moved by a rotation operation of the operation member, so that the cable fixing member is in a cable fixing state and a cable opening state. A switching cam mechanism;
Bicycle cable fixing device.   The cam mechanism is provided on the operation member, and a cam that moves the cable fixing member in a direction approaching the support member by rotation, and a cam receiving portion that is provided on the cable fixing member and engages with the cam. The bicycle cable fixing device according to claim 1, comprising:   The bicycle cable fixing device according to claim 1, wherein the rotation shaft is disposed substantially parallel to an arrangement surface on which the bicycle cable is arranged on the support member. The support member is disposed substantially orthogonal to the arrangement surface, and has a support shaft that supports the cable fixing member so as to be relatively movable in a direction contacting and separating from the arrangement surface.
The bicycle cable fixing device according to claim 3, wherein the rotation shaft is attached to the support shaft in a direction substantially orthogonal to the support shaft. The cable fixing member is
A long hole that is formed by being bent from both sides of the facing surface that can face the arrangement surface and through which the rotation shaft can pass so as to be movable relative to the rotation shaft in a direction contacting and separating from the arrangement surface. A formed connecting portion;
The bicycle cable fixing device according to claim 4, further comprising a support hole provided on the facing surface, through which the support shaft can pass, and is supported by the support shaft so as to be movable. The cam is disposed on the operation member so as to be rotatable about the rotation shaft, and has a cam surface on the outer peripheral surface, the distance of the rotation shaft from the axis being changed according to a rotation phase.
The bicycle cable fixing device according to claim 4 or 5, wherein the cam receiving portion is disposed on the cable fixing member so as to be in contact with the cam surface.

Images