JPH05319227A - Manual brake device - Google Patents

Abstract

PURPOSE:To provide a manual brake device by obviating necessity for fixing one end of a locking coil controlled to a specified method, further dispersing a load applied to an elastic coil member to possibly reduce a coil diameter or element wire diameter as a whole, and obviating necessity for a shock absorber of relaxing impact force at release time. CONSTITUTION:A stop mechanism is constituted of a drum 34 pivotally supported to a base side to integrally turn with a brake lever, plurality of shoes 51 arranged with a specified space along the internal periphery so as to come into slide contact with an internal peripheral surface of this drum, plurality of pawls 26 interposed between each shoe to extend from a base so as to impede rotary movement of the shoe, elastic coil member 52 arranged so as to come into elastic contact with the internal peripheral surface of the shoe to stop one end side to the drum with the other end side serving as a play end side and to arrange a winding direction so that direction of returning from a braking condition of the brake lever becomes a direction of spreading the diameter, and a release member 53 of pressing the play end side of this elastic coil member to contract the diameter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base fixed to a vehicle body so that a base portion of a brake lever is swingably supported, and a tip end portion thereof is extended to a vicinity of an operator, and a force is applied to the tip end portion. The present invention relates to a manual brake device that applies a brake by pushing and pulling a brake cable according to the swing of a brake lever.

[0002]

2. Description of the Related Art When an elastic coil is wound around the outer circumference of a drum so that the fixed end on one end side is locked and the other end side is not locked and is on the play side, the direction of rotation of the drum varies. In one direction, the elastic coil cannot be tightened and cannot rotate, and in the other direction, when the drum rotates, the elastic coil is loosened and easily rotates. There has been proposed a manual brake device in which the brake is released by restraining the brakes and, after braking, pushing the play side from the outside to loosen the elastic coil.

As a general structure conventionally proposed in such a case, there is a structure as shown in FIG. 6, for example. That is, the elastic coil member 1 is wound so as to elastically contact the outer periphery of the drum 2, and the fixed end 1a on one end side of the elastic coil member 1 is locked to the base side and the other end side is not locked and the drum 2 is not locked.
The free end 1b
There is. When the drum 2 is rotated in the A direction, the coil portion 1c of the elastic coil member 1 cannot wind and rotate the drum 2, and in the opposite B direction, the drum 2 is rotated relative to the coil portion 1c of the elastic coil member 1. When rotating relatively, the coil portion 1c is loosened and easily rotates.

In the case of a manual braking device, if the drum 2 and the brake lever are interlocked and the direction of rotation of the drum 2 when the brake lever is operated during braking is the direction in which the coil portion 1c is loosened, the braking direction The drum 2 can be easily rotated, and after the braking, the drum 2 can be rotated.
Even if it tries to rotate in the reverse direction, it cannot rotate and the braking state is maintained. Then, if the free end 1b is pushed so as to loosen the coil portion 1c, the coil portion 1c cannot wind up the outer periphery of the drum 2 and can release the braking.

[0005]

However, such a conventional technique has the following various problems to be improved.

(1) Since the lock load (the force that prevents the brake lever from returning to the brake lever in the braking state) concentrates on the end 1a of the elastic coil member 1 and the portion 1d connected to the end 1a, the method of fixing the end 1a ( Careful attention must be paid to the management of caulking, bolt tightening, and friction (method), and considerable work was required in designing and manufacturing.

(2) Further, in order to make the tension concentrated on a part of the elastic coil member 1 by the lock load fall within the range of the tensile strength of the strand, the elastic coil member 1 as a whole is There has been a problem that the coil diameter or the wire diameter has to be increased, resulting in an increase in size. In particular, in the direct operation method in which the coil is arranged at the center of rotation of the pedal without using the gear, the load applied to the strands cannot be reduced by the gear ratio, and this problem is remarkable.

(3) Since one end of the elastic coil member is locked to the base side, once the free end 1b of the elastic coil member is pushed by the release lever, the elastic coil member is irrespective of swing of the brake lever. The member is kept loose and the brake lever is instantly returned to the non-braking position by the tension in the brake cable. For this reason, it is necessary to provide a shock absorber that alleviates the impact force at the time of unlocking, which is a problem in reducing the number of parts and, in turn, the manufacturing cost.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is not necessary to fix one end of the elastic coil member by a predetermined method and fix the elastic coil member, and the load applied to the elastic coil member is dispersed. It is an object of the present invention to provide a manual brake device that can reduce the coil diameter or the wire diameter as a whole and does not require a shock absorber to reduce the impact force at the time of release.

[0010]

The gist of the present invention for achieving the above object is to: 1 allow the base (11) of a brake lever (30) to swing on a base (11) fixed to a vehicle body. The brake cable (2) is pivotally supported, its tip portion is extended to the vicinity of the operator, force is applied to this tip portion, and the brake cable (2
8) In a manual braking device for pushing and pulling to apply a brake, a drum (34) pivotally supported on the base side and rotated in response to swing of the brake lever.
And a shoe (51) having a cross section perpendicular to the axis formed in an arc shape so as to be in sliding contact with the inner peripheral surface of the drum, and a plurality of shoes (51) arranged at predetermined intervals along the inner periphery of the drum, and interposed between the shoes. A plurality of claws (26) extending from the base into the drum so as to prevent rotational movement of each shoe, and arranged so as to make elastic contact with the inner peripheral surface of the shoe, and one end side of which is locked to the drum, An elastic coil member (52) whose other end is a free end without being locked, and a winding direction of which is arranged so that a direction in which the brake lever returns from a braking state is a radial expansion direction;
A manual brake device characterized in that a locking mechanism (50) is constituted by a release member (53) for pressing the free end side of the elastic coil member to reduce its diameter.

(2) A base portion of a brake lever is pivotably supported on a base fixed to a vehicle body, a tip portion thereof is extended to the vicinity of an operator, a force is applied to the tip portion, and a brake is applied according to the swing of the brake lever. In a manual brake device for pushing and pulling a cable for braking, a drum pivotally supported on the base side and rotating in response to swing of the brake lever, and a shaft for slidingly contacting an outer peripheral surface of the drum. A plurality of shoes each having a right-angled cross section formed in an arc shape and arranged along the outer periphery of the drum at a predetermined interval, and interposed between the shoes to prevent the rotational movement of each shoe from the base. A plurality of claws that extend around the periphery of the shoe are arranged so as to elastically contact the outer peripheral surface of the shoe, one end side is locked to the drum, and the other end side is a free end side without being locked. The locking mechanism is configured by an elastic coil member whose winding direction is arranged so that the direction of returning from the braking state is the diameter reducing direction, and a release member which pushes the free end side of the elastic coil member to expand the diameter. Manual brake device.

3. A cylindrical support spring (54) which is elastically attached to the peripheral surface of the elastic coil member and elastically presses the elastic coil member against the shoe is provided to provide a squealing noise prevention structure. Item 1 or 2 characterized in that
Manual braking device described.

4. The manual brake device according to item 1, 2 or 3, wherein a liner member (55) is interposed between the elastic coil member and the shoe to provide a squealing noise prevention structure.

5 One end is locked to the release member,
A return spring (56) is provided, the other end of which is locked to the drum so that the restoring force acts in a direction to return the release member to the non-operating position and to return the brake lever from the braking state. , Which is characterized by
It exists in the manual brake device described in 2, 3, or 4.

[0015]

When the brake lever (30) is in the released state, the braking reaction force is not applied to the base portion of the brake lever and the brake cable (28) is relaxed. When the brake lever is rotated around the base from this state, the brake cable is pulled.

At this time, the drum (34) and the elastic coil member (52) rotate in response to the swing of the brake lever, but the shoe is prevented from rotating by the pawl and does not move. Rotate relative to. This rotation direction is the direction in which the elastic coil member contracts or expands and moves away from the shoe, so it rotates easily, and when the brake lever is swung sufficiently, the brake cable is pulled and a sufficient braking force is generated. ..

When the application of force to the brake lever is stopped, the braking reaction force from the brake cable tries to restore the brake lever. In the direction of returning from the braking state, the elastic coil member expands in diameter due to the relative rotation of the elastic coil member with respect to the shoe. Alternatively, the diameter should be reduced and the shoe should be pressed against the drum,
A strong resistance is generated and the brake lever cannot return, and the braking state is maintained.

At this time, the force (previously referred to as the lock load) for preventing the rotation of the drum, that is, the brake lever is a frictional force between the shoe and the drum, which is a plurality on the base side via a plurality of provided shoes. It bears on the formed nails.
For this reason, the lock load is not concentratedly applied to a part of the elastic coil member, and the load applied to the elastic coil member is such that the shoe is pressed against the drum, and the load is dispersed throughout.

Then, in order to release the restraint of the brake lever, the release member (53) of the locking mechanism (50) is operated to push the free end (52b) side of the elastic coil member. The pressed state against the drum is once released, and the drum and the brake lever swing toward the non-braking position. However, at this time, the elastic coil member also swings integrally with the brake lever and the like, so that the shoe and the elastic coil member rotate relative to each other, and the shoe is pressed against the drum again to be in the locked state.

Thus, each time the release member is operated, or as the release member is continuously operated, such swinging and stopping are repeated intermittently or continuously, and the brake lever gradually becomes non-responsive to the operation speed of the release member. It returns to the operating position and the brake cable is fully relaxed.

When the support spring (54) is provided, when the shoe and the elastic coil member rotate relative to each other, the entire elastic coil member slidably contacts the shoe with a substantially constant elastic force, and partially. The occurrence of squeaking and abnormal noise is suppressed because the stick phenomenon is less likely to occur without sliding contact.

Further, when the liner member (55) is provided, the shoe is in sliding contact with the liner member and is not in direct contact with the elastic coil member, so that the sticking phenomenon of the elastic coil member is less likely to occur. After all, the occurrence of squeaking noise is suppressed.

Also, one end is locked to the release member and the other end is locked to the drum, and the release member is attached so that the restoring force acts in the direction of returning the release member to the non-operating position and returning the brake lever from the braking state. If a return spring (56) is provided, the return member is returned to the non-operating position and the return force of the brake lever is supported by this single return spring.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. The manual brake device 10 is a foot-operated type, and includes a base 11 fixed to the vehicle body and a brake lever 3
A base 31 of 0 is pivotally supported by a pivot 32, and a locking mechanism 5 for restraining the brake lever 30 around the pivot 32.
0 is provided.

The base 11 has a mounting hole 1 as shown in FIG.
Attaching portions 13a, 13b, 13c, 13d in which 2a, 12b, 12c, 12d are formed respectively, boss portions 14a, 14b in which both ends of the pivot shaft 32 are respectively supported, and these attaching portions and boss portions are connected. A plurality of beams 15a, 15
21a, 21b, and has a rigid frame structure having a fixed node at the joint between the beam and the mounting portion or the boss portion, and is manufactured by, for example, die casting.

The base 11 is composed of two base constituent members 11a and 11b, and is divided into two right and left in the axial direction of the swing center axis of the brake lever 30. That is, the mounting portion 13 is attached to the base constituent member 11a.
a, 13d, a boss portion 14a, and beams 15a, ... 21a are formed, and a mounting portion 13b,
13c, a boss portion 14b, and beams 15b, ... 21b are formed, and the base constituent member 11a and the base constituent member 11b are formed.
Are fastened together by bolts at small boss portions 22a, 22b, ... 25a, 25b for fixing, which are formed at appropriate intervals at the ends of each beam.

Further, in this case, the boss portion 14b of the base 11 is provided with three claws 26 extending from the equidistant positions on the outer periphery thereof toward the boss portion 14a in this case. This claw 26
Is a component of the locking mechanism 50, and has an arc-shaped cross section perpendicular to the axis. Further, an arcuate slit 27 is formed in the boss portion 14b along the periphery of the center hole. In addition, the small boss portion 24b of the base component 11b
A guide hole 12e is provided near which a release cable for operating a release lever 53, which will be described later, is inserted and guided.
Are formed.

Here, the mounting holes 12a, 12 of the base 11 are
Mounting holes 12a, 12b, 1 of b, 12c, 12d
Reference numeral 2c is for fixing the base 11 to the vehicle body with bolts, and the mounting hole 12d is for mounting an outer tube 29 of a brake cable 28 for transmitting a braking force as shown in FIG.

The brake lever 30 is pivotally supported with the base portion 31 being sandwiched between the boss portions 14a and 14b of the base 11. That is, the base portion 3 of the brake lever 30
1, a pivotal boss 33 is formed as shown in FIG.
The brake lever 30 is swingably supported by fitting the pivot support boss 33 onto the pivot support shaft 32 via a bearing 34. As shown in FIG. 4, the pivotal boss 33 has engaging portions 33a, 3 to which one end of an elastic coil member 52 or a return spring 56 described later is locked.
3b is formed.

A drum 34 having the same central axis as the pivot boss 33 is formed outside the pivot boss 33 at the base 31 of the brake lever 30. This drum 34
Has a size such that the claws 26 are arranged inside, and a circumferential groove 35 is formed on the outer circumference of the base end side thereof. Then, the brake cable 28 has the groove 3
5 is wound around the base end side of the drum 34 in a state of being fitted in 5, and its tip is attached to an adjust nut mechanism 35 provided on the base 31 side of the brake lever 30 so that the initial tension can be adjusted. ..

The tip of the brake lever 30 extends to the foot near the operator, and a pedal 36 having a tread surface 36a directed toward the operator's leg is fixedly installed at the tip of the pedal.
A pad 37 is attached to the tread surface 36 a of 6. The pad 37 has an outer shape that does not project outside the peripheral edge of the pedal 36, and is attached by inserting a protrusion 37a formed on the back surface thereof into a hole 36b formed in the center of the pedal 36.

As shown in FIGS. 3 and 4, the locking mechanism 50 includes the drum 34, the shoe 51, the claw 26, and
Elastic coil member 52, release lever 53 (release member), support spring 54, liner member 5
5 and a return spring 56.

The shoe 51 is formed in an arcuate cross section perpendicular to the axis so as to be in sliding contact with the inner peripheral surface of the drum 34. A plurality of shoes 51 are provided at predetermined intervals along the inner peripheral surface of the drum 34 with the claws 26 interposed therebetween. In this case, three are provided, and the claw 2
Rotational movement is blocked by 6.

The elastic coil member 52 is arranged so as to make elastic contact with the inner peripheral surface of the shoe 51, and is locked at the drum 34 (brake lever 30) by fitting one end 52a into the engaging portion 33a. The end 52b is a free end side without being locked. The elastic coil member 52 is expanded in diameter by friction generated by relative rotation between the shoe 51 and the elastic coil member 52 when the brake lever 30 rotates in the direction returning from the braking state (counterclockwise direction in FIG. 1). , Its winding direction is set.

The release lever 53 is rotatably attached to the boss portion 14b of the base 11 at its base end side.
It oscillates along the outer side surface of b, a hook portion 53a is formed at its tip, and the slit 2 is formed on the inner side surface.
Protrusion 5 extending through 7 to the inside of drum 34
3b is formed.

The release lever 53 has a hook portion 53.
The tip end of the elastic coil member 52 is attached to a and is pulled by the release cable guided in the guide hole 12e and swings counterclockwise in FIGS. 1 and 4 to cause the elastic coil member 52 to move when the brake lever 30 is in the braking position. The tip end of the projection 53b comes into contact with the free end 52b to push the free end 52b,
The diameter of the elastic coil member 52 is reduced.

The support spring 54 is attached to the inner peripheral surface of the elastic coil member 52 so as to make elastic contact therewith, has a C-shaped cross section, and has a cylindrical shape for elastically pressing the elastic coil member 52 against the shoe 51. And constitutes a structure for preventing abnormal noise.

The liner member 55 is the elastic coil member 52.
Which is interposed between the shoe 5 and the shoe 51, has a C-shaped cross section, and one end 55a of which is bent in the radial direction has the shoe 5
It is prevented from rotating by being inserted between 1 and the claw 26. This liner member 55 also constitutes a squealing noise prevention structure.

The return spring 56 is a coil spring arranged inside the elastic coil member 52 along the outer periphery of the pivot boss 33, and one end 56a thereof is provided at the pivot boss 3.
The other end 56b is engaged with the protrusion 53b of the release lever 53. The return spring 56 has a restoring force of the release lever 5
3 in the direction toward the non-operating position (clockwise in FIGS. 1 and 4) and the brake lever 30 in the direction toward the non-braking position ((counterclockwise in FIGS. 1 and 4)). Direction and mounting direction are set.

Next, the operation will be described. Brake lever 30
Is in the released state (the state shown in FIG. 1), the braking reaction force is not applied to the base portion 31 of the brake lever 30, and the brake cable 28 is relaxed. From this state, when the pedal 36 is stepped on with the foot and the brake lever 30 is swung clockwise in FIG. 1, the brake cable 28 is pulled.

At this time, the drum 34 and the elastic coil member 52 rotate according to the swing of the brake lever 30,
Since the rotation of the shoe 51 is blocked by the pawl 26 and the shoe 51 does not move, the elastic coil member 52 rotates relative to the shoe 51. This rotation direction is a direction in which the elastic coil member 52 is reduced in diameter and moves away from the shoe 51, so that the elastic coil member 52 is easily rotated, and when the brake lever 30 is swung sufficiently, the brake cable 28 is drawn and a sufficient braking force is generated. To do.

When the pedal 36 is stopped, the braking reaction force from the brake cable 28 and the return spring 56 are released.
Of the elastic coil member 5 due to the relative rotation of the elastic coil member 52 with respect to the shoe 51 (liner member 55).
2 increases in diameter to push the shoe 51 against the drum 34, strong resistance is generated, the brake lever 30 cannot return, and the braking state is maintained.

At this time, the force (lock load) for preventing the rotation of the drum 34, that is, the brake lever 30 is a frictional force between the shoe 51 (liner member 55) and the drum 34, and a plurality of shoes are provided. A plurality of claws 26 are formed on the base 11 via 51. For this reason,
This lock load is not concentratedly applied to a part (for example, one end 52a) of the elastic coil member 52, and the load applied to the elastic coil member 52 is only the reaction force for pressing the shoe 51 against the drum 34, and This load is distributed throughout it.

When the release lever 53 of the locking mechanism 50 is operated to push the free end 52b of the elastic coil member 52 in order to release the restraint of the brake lever 30, the elastic coil member 52 moves to the drum 34 of the shoe 51. The pressed state of is released once, and the drum 34 and the brake lever 30 are released.
Is rotated toward the non-braking position (counterclockwise in FIG. 1) by the braking reaction force from the brake cable 28 and the restoring force of the return spring 56. However, at this time, the elastic coil member 52 also rotates integrally with the brake lever 30 and the like, so that the shoe 51 (liner member 55) and the elastic coil member rotate relative to each other, and the shoe 51 is pressed against the drum again, and is locked. Becomes

Thus, each time the release lever 53 is operated, or as it continues to be operated, such rotation and stop are repeated intermittently or continuously, and the brake lever 30 operates in accordance with the operation speed of the release lever 53. The brake cable 28 is gradually returned to the non-operating position, and the brake cable 28 is completely relaxed.

Then, the release lever 53 returns to the non-operating position by the urging force of the return spring 56 when the above-mentioned release cable is loosened. In the above operation, when the shoe 51 and the elastic coil member 52 relatively rotate, the action of the support spring 54 causes the entire elastic coil member 52 to slidably contact the shoe 51 with a substantially constant elastic force and partially slide. Since the shoe 51 does not come into direct contact with the elastic coil member 52 due to the interposition of the liner member 55, the sticking phenomenon of the elastic coil member 52 is less likely to occur and squeaking noise is suppressed.

As described above, in the above manual brake device, since the load does not concentrate on one end of the elastic coil member 52, it is not necessary to control and fix the one end by a predetermined method, and the elastic coil member as a whole. The coil diameter or the wire diameter of 52 can be reduced. Further, when the brake is released, the brake lever 30 gently returns to the non-operating position in accordance with the operation speed of the release lever 53, so that it is not necessary to provide a shock absorber for absorbing the impact force.
Further, due to the double action of the support spring 54 and the liner member 55, generation of unpleasant squeaking noise is surely prevented.

The above embodiment is an example in which the shoe and the elastic coil member are arranged inside the drum, which is an optimum mode from the viewpoint of downsizing of the apparatus, but these shoes and the like are arranged outside the drum. A locking mechanism having a configuration in which the elements are sequentially arranged may be used.

That is, the shoes are formed so as to be in sliding contact with the outer peripheral surface of the drum, the claws are provided between the shoes so as to extend around the drum so as to prevent the rotational movement of the shoes, and the elastic coil member is provided. It is arranged so as to make elastic contact with the outer peripheral surface of the shoe via a liner member, and the winding direction of this elastic coil member is set so that the direction in which the brake lever returns from the braking state is the diameter reducing direction and the elastic coil member is expanded by the release lever. Alternatively, the support ring may be fitted around the elastic coil member.

Further, the present invention is not limited to the one in which the brake lever and the drum are integrally provided as in the above-mentioned embodiment, but the elastic coil member may be applied to those in which these are provided separately and interlocked by the gear. It is possible to obtain the same operational effect such as not having to fix one end of the. However,
If the present invention is applied, it is not necessary to adopt such a configuration that has a disadvantage that it is slightly enlarged and an extra configuration of a gear is required in order to obtain a load reducing action by a gear ratio.

[0051]

According to the manual brake device of the present invention, since the load is not concentrated on one end of the elastic coil member, it is not necessary to control and fix the one end by a predetermined method, and the elastic coil as a whole. It is possible to reduce the coil diameter or the wire diameter of the member. Further, when the brake is released, the brake lever gently returns to the non-operating position in accordance with the operation speed of the release lever, so that it is not necessary to provide a shock absorber to reduce the impact force. Therefore, the design and manufacture of the manual brake device are facilitated, and the cost can be reduced or the device can be downsized.

Further, in the case where the support spring is provided, when the shoe and the elastic coil member rotate relative to each other, the entire elastic coil member makes sliding contact with the shoe with a substantially constant elastic force and partially slides. The occurrence of squeaking and abnormal noise is suppressed due to the fact that the stick phenomenon caused by this does not occur and the stick phenomenon hardly occurs.

Further, when the liner member is provided, the shoe is in sliding contact with the liner member and not directly in contact with the elastic coil member, so that sticking phenomenon of the elastic coil member due to this is less likely to occur. Since the generation of squeaking noise is suppressed, the user is not made uncomfortable, and the practicality is improved.

Further, one end is locked to the release member and the other end is locked to the drum, and the release member is attached so that the restoring force acts in the direction of returning the release member to the non-operating position and returning the brake lever from the braking state. If a return spring is provided, the return member is returned to the non-operating position and the return force of the brake lever is supported by this single return spring. The number of parts can be further reduced and the cost can be reduced as compared with the conventional case in which the spring is provided.

[Brief description of drawings]

FIG. 1 is a side view of a manual brake device showing an embodiment of the present invention.

FIG. 2 is a view on arrow II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

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

FIG. 5 is an exploded perspective view of a manual brake device showing an embodiment of the present invention.

FIG. 6 is a diagram showing a conventional technique.

[Explanation of symbols]

 10 ... Manual braking device 11 ... Base 26 ... Claw 28 ... Brake cable 30 ... Brake lever 31 ... Base 34 ... Drum 50 ... Locking mechanism 51 ... Shoe 52 ... Elastic coil member 52b ... Free end 53 ... Release member (release lever) 54 ... Support Spring 55 ... Liner Member 56 ... Return Spring

Claims (5)

[Claims] 1. A base portion of a brake lever pivotably supported on a base fixed to a vehicle body, a tip portion of the brake lever is extended to the vicinity of an operator, and a force is applied to the tip portion to follow the swing of the brake lever. In a manual brake device for pushing and pulling a brake cable to apply a brake, a drum pivotally supported on the base side and rotating in response to swing of the brake lever is in sliding contact with an inner peripheral surface of the drum. And a plurality of shoes arranged along the inner circumference of the drum at predetermined intervals, and interposed between the shoes to prevent rotational movement of each shoe. A plurality of claws extending from the inside of the drum to elastically contact the inner peripheral surface of the shoe, one end side is locked to the drum, the other end side is a free end side without locking, and the brake lever is Control The locking mechanism is configured by an elastic coil member whose winding direction is arranged so that the direction returning from the moving state is the radial expansion direction, and a release member which presses the free end side of this elastic coil member to reduce the diameter. Manual brake device. 2. A base of a brake lever is pivotably supported on a base fixed to a vehicle body, a tip portion of the brake lever is extended to the vicinity of an operator, and a force is applied to the tip portion to follow the swing of the brake lever. In a manual brake device for applying a brake by pushing and pulling a brake cable, a drum pivotally supported on the base side and rotated according to the swing of the brake lever is slidably contacted with an outer peripheral surface of the drum. A plurality of shoes each having an arcuate cross section formed in an arc shape and arranged at a predetermined interval along the outer periphery of the drum, and interposed between the shoes to prevent rotational movement of each shoe from the base. A plurality of claws extending around the drum and elastically contacting the outer peripheral surface of the shoe, one end of which is locked to the drum and the other end of which is a free end without being locked, and the brake lever is The locking mechanism is composed of an elastic coil member whose winding direction is arranged such that the direction of returning from the braking state is the diameter reducing direction, and a release member which pushes the free end side of the elastic coil member to expand the diameter. Manual brake device. 3. A squealing noise prevention structure is provided by providing a cylindrical support spring that is elastically attached to the peripheral surface of the elastic coil member and elastically presses the elastic coil member against the shoe. The manual brake device according to claim 1 or 2, which is characterized. 4. The manual brake device according to claim 1, wherein a liner member is interposed between the elastic coil member and the shoe to provide a squealing noise preventing structure. 5. One end is locked to the release member, and the other end is locked to the drum so that the restoring force of the release member returns to the non-operating position and the brake lever returns from the braking state. 5. A manual braking device according to claim 1, 2, 3 or 4, characterized in that a return spring mounted so as to work is provided.