JP3159551U - Bicycle brake device - Google Patents

Abstract

A brake device for a bicycle is provided that allows a front wheel and a rear wheel to be braked by operating one brake lever. A spring for rotatably connecting a balance lever 4 and two Y-shaped calipers 5 and 6 to a center shaft 15 and urging each Y-shaped caliper 5 and 6 in a direction away from each other. A member is provided. The balance lever 4 one end portion 4a of the front wheel side brake mechanism I, in which the brake rubber 18 is attached to the brake rubber attachment portions 16 and 17 provided in the respective Y-shaped calipers 5 and 6, and the operating arm portion of the rear wheel side brake mechanism II 9 is connected with the front and rear connection brake inner cable 13. Further, the other Y-shaped caliper 6 and the fixed side bracket 10 are connected by a front / rear connecting brake outer cable 14. Further, the brake lever 2 and the balance lever 4 other end 4 b are connected by the inner cable 7, and the outer locking portion 20 on the brake lever side and the one Y-shaped caliper 5 are connected by the outer cable 8. [Selection] Figure 1

Description

  The present invention relates to a bicycle brake device.

  In a commonly used bicycle, the brake device on the front wheel side is operated by pulling one brake lever attached to one side of the handle with the hand holding the handle to brake the rotation of the front wheel. The rear wheel side brake device is operated by pulling the other brake lever attached to the handle with the hand holding the handle to brake the rotation of the rear wheel. The braking action is performed independently.

  In the above-described bicycle brake device, the brake mechanism on the front wheel side is generally one that brakes the rim of the front wheel of the bicycle, and an example is shown in FIGS. A configuration is proposed. Further, as a brake mechanism on the rear wheel side, a brake mechanism that brakes the rear wheel hub of a bicycle is generally used. As an example, a structure shown in FIG. 4 has been proposed.

  4 (a) and 4 (b) shows a support shaft 104 in which a C-shaped brake arm 101 and a Y-shaped brake arm 102 are attached to a front fork 103 indicated by a two-dot chain line in FIG. 4 (b). The brake rubber 108 is opposed to the lower end which is one end of the brake arm 101 and the brake rubber mounting portions 107 and 107a provided at the lower end of the brake arm 102, respectively. Attach both ends of the torsion spring 106 having the central portion locked to the gear case 105 to the brake arms 101 and 102, and the brake rubber 108 portions of the brake arms 101 and 102 are separated from each other. To be energized. Reference numeral 109 denotes an inner cable, one end of which is fixed to the other end of the C-shaped brake arm 101 by a wire fixing bracket 112, and the other end is connected to a brake lever attached to a handle (not shown). Reference numeral 110 denotes an outer cable through which the inner cable 109 is inserted. One end is attached to the upper end of the Y-shaped brake arm 102 via a wire adjustment fitting 111, and the other end is attached to the handle side. Reference numeral 113 denotes a washer, and reference numeral 114 denotes a nut screwed to the support shaft 104.

  As a result, when a brake lever for braking the front wheel (not shown) is pulled, the inner cable 109 is pulled, so that the brake arm 101 overcomes the elastic force of the torsion spring 106 and moves the support shaft 104 in FIG. The brake rubber attaching portion 107 is moved inward by turning counterclockwise about the center, and the brake rubber 108 comes into contact with a rim (not shown) to perform a braking action. At this time, the reaction force is applied to the outer cable 110, so that the brake arm 102 overcomes the elastic force of the torsion spring 106 and is rotated in the clockwise direction in FIG. The rubber mounting portion 107a is moved inward so that the brake rubber 108 comes into contact with the rim to perform a braking action (see, for example, Patent Document 1).

  FIG. 5 shows a brake mechanism on the rear wheel side, a fixed bracket 116 that is non-rotatably attached to the bicycle frame 115, a brake drum that can rotate integrally with the hub, and a brake drum. And a brake operation part that presses the brake shoe against the brake drum side. By swinging the operation arm part 117 of the brake operation part in the front-rear direction, a braking action and a brake releasing action are provided. It is supposed to be done. In the figure, 118 is a spring member adapted to urge the operating arm portion 117 in the braking release direction, 119 is an inner cable, and one end side is fastened to the inner mounting portion 120 attached to the end portion of the operating arm portion 117. It is supposed to be fixed. 121 is a chain stay, 122 is a bracket fixed to the chain stay 121, and 123 is an outer cable through which the inner cable 119 is inserted. The outer locking portion 124 is engaged with the bracket 122.

  As a result, when the brake lever attached to the handle is pulled and the inner cable 122 is pulled forward (to the left in FIG. 5), the operating arm portion 117 is moved to the spring member 118 via the inner cable 119 and the inner locking portion 120. The brake shoe is overcome and swung forward, and the brake shoe is pressed against the brake drum to perform a braking action (see, for example, Patent Document 2).

Registered Utility Model No. 3012511 JP 2005-325919 A

  However, a conventional bicycle normally uses a brake mechanism as shown in FIGS. 4 (a) and 4 (b) for braking on the front wheel side, and uses a brake mechanism of the type shown in FIG. 5 on the rear wheel side. The front wheel brake mechanism is operated by pulling the brake lever on the right side of the handle, and the rear wheel brake mechanism is operated separately by pulling the brake lever on the left side of the handle. As a thing.

  Therefore, when traveling at a high speed or traveling down a downhill road, for example, if only the front wheel side brake mechanism is operated to decelerate, the front wheel side brake mechanism brakes forward. There is a risk of falling.

  Therefore, the present invention allows the front wheel and the rear wheel to be braked simultaneously by operating one brake lever, and the rear wheel is braked independently by operating the other brake lever. It is an object of the present invention to provide a bicycle brake device that can improve the stability when the brake mechanism of the present invention is operated and stopped.

  In order to solve the above-mentioned problems, the present invention corresponds to claim 1, wherein two calipers each having a brake rubber attached to the lower end portion are arranged so that the brake rubbers on the lower end portion face each other. The center wheel is rotatably supported by a center shaft, and the two calipers are biased in such a way that the lower ends thereof open to each other, and a spring member that biases the balance lever to rotate in one direction is provided. A front wheel side brake mechanism for braking the rear wheel and a rear wheel side brake mechanism having a swinging member for braking the rear wheel, one end of the balance lever of the front wheel side brake mechanism and one caliper Is connected to one brake lever side of the handle via an inner cable and an outer cable, and the swing member and the fixed side of the rear wheel side brake mechanism are connected to the inner cable and the outer cable. -Connect to the other brake lever side of the handle via the cable, and connect the other end of the balance lever of the front wheel side brake mechanism and the other caliper to the swinging member and the fixed side of the rear wheel side brake mechanism. The connecting brake inner cable is connected to the front and rear connecting brake outer cables.

  According to a second aspect of the present invention, a cable wire guide is attached to the rocking member in the above-described configuration, a front / rear connecting brake inner cable and a rear wheel braking inner cable are inserted through the cable wire guide, and each inner A locking member is attached to the tip of the cable so that the rocking member is locked.

  Further, according to claim 3, the position in which each caliper is moved by the spring member in the above configuration can be adjusted by the caliper stopper adjusting member.

  Furthermore, the front-rear connecting brake inner cable positioned between the cable wire guide of the swinging member of the rear wheel side brake mechanism and the fixed side is brought into contact with the fixed side when the front wheel side brake mechanism is braked. The wire stopper is installed.

The bicycle brake device of the present invention exhibits the following excellent effects.
(1) Two calipers with brake rubber attached at the lower end are arranged so that the brake rubber at the lower end faces each other, and are supported rotatably at the center of the balance lever by the center shaft. There is a front-wheel brake mechanism and a swinging member that urges the caliper so that the lower ends open to each other and includes a spring member that urges the balance lever to rotate in one direction so as to brake the front wheel. A rear wheel brake mechanism that brakes the rear wheel, and connects one end of the balance lever and one caliper of the front wheel brake mechanism to one brake lever side of the handle via an inner cable and an outer cable. And the other brake lever of the handle via the inner cable and the outer cable. In addition, the other end of the balance lever and the other caliper of the front wheel side brake mechanism are connected to the swinging member and the fixed side of the rear wheel side brake mechanism, and the front and rear connection brake inner cable and the front and rear connection brake outer cable are connected. The front wheel and the rear wheel can be braked simultaneously by operating one brake lever, and the rear wheel can be braked independently by operating the other brake lever. The stability when the front wheel side brake mechanism is operated and stopped can be enhanced.
(2) Further, a cable wire guide is attached to the swing member in the above configuration, and the front and rear connecting brake inner cables and the rear wheel braking inner cable are inserted into the cable wire guide, and the front end portions of the inner cables are engaged. Since a stop member is attached and locked to the swing member, the front and rear connecting brake inner cables move along the cable wire guide when the other brake lever is pulled to brake the rear wheel. It is possible to prevent the front and rear connecting brake inner cables from sagging.
(3) Further, since the position where each caliper is moved by the spring member in the above configuration can be adjusted by the caliper stopper adjusting member, each caliper is moved excessively in the direction away from each other by the spring member. By doing so, it is possible to prevent the front and rear connecting inner cables from being moved and the rear wheel brakes from working.
(4) Furthermore, the front / rear connecting brake inner cable positioned between the cable wire guide of the swing member of the rear wheel side brake mechanism and the fixed side is brought into contact with the fixed side when the front wheel side brake mechanism is braked. By configuring the wire stopper to be fixed, the wire stopper is fixed when the front wheel brake mechanism is braked even when the rear wheel brake member breaks down and the swinging member stops functioning. The front wheel side brake mechanism can be braked independently.

It is a schematic diagram showing one embodiment of a bicycle brake device of the present invention. FIG. 2 is an enlarged view of two Y-shaped calipers used in the bicycle brake device of the present invention shown in FIG. 1, (A) is a schematic front view of a caliper on one side, and (B) is a schematic front view of a caliper on the opposite side. It is. It is a schematic front view which shows the other example of the balance lever as another form of implementation of this invention. The schematic which shows an example of the conventional brake mechanism for bicycles is shown, (A) is a front view, (B) is a side view. It is a schematic side view which shows the other example of the conventional bicycle brake mechanism.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIGS. 1 and 2 (a) and 2 (b) show an embodiment of a bicycle brake device of the present invention, which has a brake mechanism I on the front wheel side and a hub brake structure similar to that shown in FIG. By pulling the brake lever 2 attached to the right side of the handle 1 to the grip 1a side of the handle 1 so that the rear wheel brake mechanism II can be attached to the bicycle frame, the front wheel brake mechanism I brakes. In the configuration in which the rear wheel side brake mechanism II is braked by pulling the brake lever 3 attached to the left side of the handle 1 toward the grip 1b side of the handle 1, the front wheel side brake mechanism is configured as described above. I uses the balance lever 4 shaped like an arch and the two Y-shaped calipers 5 and 6 so that one end 4a of the balance lever 4 and one key The projection of Lipa 5, the inner cable 7 and the outer cable 8 from the right brake lever 2 of the handle 1 to be locked. Further, the handle 1 is attached to the operating arm portion 9 and the fixed side bracket 10 as a swinging member that swings the brake operation portion of the rear wheel side brake mechanism II to perform the braking action and the brake releasing action of the rear wheel. The inner cable 11 and the outer cable 12 from the left brake lever 3 are locked, and the other end 4b of the balance lever 4 of the front-wheel brake mechanism I and the protruding portion 6a of the other caliper 6 are The other end sides of the front and rear connection brake inner cable 13 and the front and rear connection brake outer cable 14 that are locked at one end side are locked to the operation arm portion 9 and the fixed side bracket 10 of the rear wheel side brake mechanism II. The balance lever 4 of the front wheel side brake mechanism I is rotated around the center shaft 15 by operating the right brake lever 2 of the handle 1. Thus, at the same time as the front wheel side brake mechanism I performs a braking action, the operating arm portion 9 of the rear wheel side brake mechanism II is swung through the front / rear connecting brake inner cable 13 by the displacement of the other end portion 4b of the balance lever 4. Thus, the rear wheel side brake mechanism II is configured to act as a brake.

  More specifically, the balance lever 4 and the two Y-shaped calipers 5 and 6 constituting the front wheel brake mechanism I are rotatably supported by a center shaft 15 attached to a front fork (not shown) which is a bicycle frame. In addition, the two calipers 5 and 6 are urged in the direction of opening the lower ends (directions away from each other) by a spring member such as a torsion spring (not shown), and the balance lever 4 is urged clockwise in FIG. It is supposed to be energized.

  A brake rubber 18 is detachably attached to the brake rubber mounting portion 16 at the lower end portion of the one caliper 5 and the brake rubber mounting portion 17 at the lower end portion of the other caliper 6 so as to face each other. The calipers 5 and 6 overcome the elasticity of the spring member and rotate around the center shaft 15 so that the brake rubber 18 is brought into pressure contact with the rim 19 of the front wheel of the bicycle from both sides for braking action. .

  Further, the end portion of the outer cable 8 locked to the outer locking portion 20 fixed to the handle 1 is locked to the protruding portion 5 a of the one caliper 5, and is inserted into the outer cable 8. One end portion of the inner cable 7 is fastened and fixed to the one end portion 4a of the balance lever 4 so that the mounting position can be adjusted, and by pulling the brake lever 2 to which the other end portion of the inner cable 7 is locked, One end 4a of the balance lever 4 is pulled upward about the center shaft 15 by the inner cable 7 and is rotated counterclockwise in FIG.

  On the other hand, one end of the front / rear connecting brake outer cable 14 is engaged with the protruding portion 6a of the other caliper 6, and one end of the front / rear connecting brake inner cable 13 inserted through the front / rear connecting brake outer cable 14. Is fastened and fixed to the other end 4b of the balance lever 4 so that the mounting position can be adjusted.

  The stationary bracket 10 is fixed to the chain stay 23 of the bicycle frame 22 in which the stationary bracket 21 of the rear wheel side brake mechanism II is non-rotatably mounted via the bracket 24, and the stationary bracket 10 and the handle 1 are fixed. The outer cable 12 is disposed between the outer locking portion 25 fixed to the left side so that both ends are locked to the fixed bracket 10 and the outer locking portion 25, and the rear wheel brake The fixed bracket 10 on the mechanism II side is engaged with the other end portion of the front / rear connecting brake outer cable 14 that is engaged with the protruding portion 6a of the other caliper 6 of the front wheel side brake mechanism I. Further, the two outer cables 12 and 14 in which the cylindrical cable wire guides 26 and 27 are locked to the fixed bracket 10 at the front end portion of the operation arm portion 9 of the rear wheel side brake mechanism II. Fixed and installed parallel to the front-rear direction according to the position. The other end side of the inner cable 11 inserted into the outer cable 12 and locked at one end to the brake lever 3 of the handle 1 is led backward from the fixed bracket 10 and inserted into the one cable wire guide 26. Then, the locking member 28 is attached to the projecting end so that the cable wire guide 26 is not pulled out. Similarly, on the other end side of the front / rear connecting brake inner cable 13 locked to the other end portion 4b of the balance lever 4 of the front wheel brake mechanism I, the other cable wire guide is guided rearward from the fixed bracket 10. After being inserted into the cable 27, the locking member 28 is attached to the protruding end so that the cable wire guide 27 does not come out.

  Further, a wire stopper 29 can be detachably fixedly installed in the middle of the front and rear connecting brake inner cable 13 located between the fixed side bracket 10 and the cable wire guide 27 so that the rear wheel side can be attached. When the brake mechanism II breaks down and the operating arm 9 does not function, a wire stopper 29 is fixedly installed on the front / rear connecting brake inner cable 13 as shown in FIG. 1, and the wire stopper 29 is engaged with the fixed side bracket 10. By making it possible to stop, the front wheel side brake mechanism I can be braked.

  In addition, as shown in FIGS. 1 and 2 (B), the one caliper 5 is configured such that the center shaft 15 is attached to the upper end portion, and a caliper stopper is attached to the adjustment screw mounting seat 30 provided on the upper end portion. An adjustment screw 31 is attached.

  As shown in FIGS. 1 and 2 (a), the other caliper 6 is configured such that the center shaft 15 is attached to the upper end, and the tip of the caliper stopper adjusting screw 31 is brought into contact with the upper end. A stopper 32 is provided.

  In FIG. 1, 33 indicates a tire and 34 indicates a tube.

  In such a configuration, when one brake lever 2 is pulled in order to stop the traveling bicycle, the one inner cable 7 is pulled, so that the balance lever 4 is centered on the center shaft 15 and is counterclockwise in FIG. The one caliper 5 is centered on the center shaft 15 by a reaction force acting on the outer cable 8 disposed between the outer locking portion 20 of the handle 1 and the one caliper 5 while being swung around the center shaft 15. The brake rubber 18 that is swung clockwise in FIG. 1 and attached to the lower end of the one caliper 5 is pressed against the rim 19. Further, when the front / rear connecting brake inner cable 13 arranged between the balance lever and the operating arm portion 9 of the rear wheel side brake mechanism II is pulled by the swing of the balance lever 4, the reaction force is connected to the front / rear connection. The other caliper 6 acts on the brake outer cable 14 and is swung counterclockwise in FIG. 1, and the brake rubber 18 attached to the lower end portion of the other caliper 6 is pressed against the rim 19. . In this way, the brake rubber 18 attached to the lower end portions of the calipers 5 and 6 is pressed against the rim 19, so that the brake is applied to the front wheels. On the other hand, the force of pulling the front / rear connecting brake inner cable 13 due to the swing of the balance lever 4 acts on the operating arm portion 9 of the rear wheel side brake mechanism II via the front / rear connecting brake inner cable 13, thereby Since the arm portion 9 is swung forward, the brake is applied to the rear wheel. Accordingly, when the front wheels are braked by the front wheel side brake mechanism I, the rear wheels are braked by the rear wheel side brake mechanism II at the same time, so that the bicycle can be stopped stably.

  On the other hand, when the other brake lever 3 is pulled, the force for pulling the other inner cable 11 acts on the operation arm portion 9 of the rear wheel side brake mechanism II, thereby causing the operation arm portion 9 to swing forward. Therefore, braking is performed only on the rear wheel side, and the bicycle can be stopped.

  In the above, the cable wire guide 27 is attached to the operation arm portion 9 of the rear wheel side brake mechanism II so that the front and rear connection brake inner cable 13 is inserted into the wire guide 27 and is locked to the front end portion of the front and rear connection brake inner cable 13. Since the member 28 is attached and the front and rear connection brake inner cable 13 is locked to the operation arm portion 9, when the rear wheel is braked by pulling the brake lever 3 of the bicycle, the front and rear connection brake inner cable 13 is provided. The cable 13 can be moved along the cable wire guide 27, and the front-rear connecting brake inner cable 13 can be prevented from sagging.

  In addition, the position where the calipers 5 and 6 are moved by the torsion spring can be adjusted by the screwing amount of the caliper stopper adjusting screw 31, so that the torsion springs of the calipers 5 and 6 which are different for each actually assembled product. The amount of movement by can be set optimally.

  In the above embodiment, an example in which each caliper 5, 6 is Y-shaped has been shown. However, the calipers 5, 6 may have different shapes. For example, a rim brake device may be employed, and the caliper stopper adjusting screw 31 may be attached to a stopper 32 provided so as to protrude from the other caliper 6, for example. As long as the position to which the calipers 5 and 6 can be moved can be limited by any of the above, the balance lever 4 can be of any type. For example, as shown in FIG. 35 is provided with a slit 36, and the inner cables 7, 13 are passed through the cable wire locking hole 35 through the slit 36, and It is also possible to employ one in which the locking member at the end of each of the cable 7 and 13 is prevented from coming out of the cable wire locking hole 35, and various modifications within the scope not departing from the gist of the present invention. Of course, it can be added.

I Front wheel brake mechanism II Rear wheel brake mechanism 1 Handle 2 Right brake lever (one brake lever)
3 Left brake lever (the other brake lever)
4 Balance lever 4a One end 4b Other end 5 One caliper 6 The other caliper 7 Inner cable 8 Outer cable 9 Operating arm (oscillating member)
10 Fixed bracket (fixed side)
11 Inner cable 12 Outer cable 13 Front / rear connecting brake inner cable 14 Front / rear connecting brake outer cable 15 Center shaft 18 Brake rubber 26, 27 Cable wire guide 28 Locking member 31 Caliper stopper adjusting screw (caliper stopper adjusting member)

Claims (4)

  Two calipers with brake rubber attached at the lower end are placed so that the brake rubber at the lower end faces each other, and are supported by the center shaft of the balance lever so that they can rotate on the center shaft. The front wheel side brake mechanism is provided with a spring member for urging the balance levers to open each other and for urging the balance lever to rotate in one direction so as to brake the front wheel. A rear wheel brake mechanism for braking the wheel is provided, and one end of the balance lever and one caliper of the front wheel brake mechanism are connected to one brake lever side of the handle via an inner cable and an outer cable. In addition, the swinging member and the fixed side of the rear wheel side brake mechanism are connected to the other brake lever side of the handle via the inner cable and the outer cable. Further, the other end of the balance lever of the front wheel side brake mechanism and the other caliper are connected to the swinging member and the fixed side of the rear wheel side brake mechanism via the front and rear connection brake inner cable and the front and rear connection brake outer cable. A bicycle brake device characterized by having a coupled configuration.   A cable wire guide is attached to the swinging member of the rear wheel brake mechanism, the front and rear connecting brake inner cables and the rear wheel braking inner cable are inserted into the cable wire guide, and a locking member is attached to the end of each inner cable. The bicycle brake device according to claim 1, wherein the bicycle brake device is attached and locked to the swing member.   The bicycle brake device according to claim 1 or 2, wherein a position at which each caliper is moved by the spring member can be adjusted by a carrier stopper adjusting member.   A wire stopper is provided on the front / rear connecting brake inner cable located between the cable wire guide of the swinging member of the rear-wheel brake mechanism and the fixed side so as to abut on the fixed side when the front-wheel brake mechanism is actuated. The bicycle brake device according to claim 2 or 3, wherein the bicycle brake device is installed.

Images