JPH1143027A - Manual braking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manual braking device which can freely establish the setting of a lever ratio, and concurrently, can easily and surely lock the brake. SOLUTION: In a manual braking device equipped with a base member 20, a braking lever 30 pivotally attached to the base member 20 in such a way that it can rises and falls, and with a cable connection mechanism 40 connected with a cable, vertical grooves 21 are engraved in the base member 20, an arc shaped cam part 31 is engraved in the braking lever 30 in such a way as to be intersected with the vertical grooves 21, a locking mechanism 50 is provided, which locks the braking lever 30 onto the cable connection mechanism 40 in such a way that they can be released from each other, the cable connection mechanism 40 has both end parts 42a crosslinked over to the part 31 at a place where the cam part 31 and the vertical grooves 21 are intersected with each other in such a way that it can be moved along them, and furthermore, the mechanism 40 is provided with a trunnion pin 42 A whose both ends 42a are inserted into the vertical grooves 21, an intermediate rod 43 having its one end side mounted to the intermediate position of the trunnion pin 42 in such a way as to be perpendicularly intersected therewith, and with a cable bracket 45 mounted to the other end side of the intermediate rod 43 to which the cable is mounted, in such a way that it can be pivotally moved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base member, a brake lever pivotally attached to the base member so that the base member can be tilted,
A cable connecting mechanism to which a cable is connected.

[0002]

2. Description of the Related Art As a conventional manual brake device of this type, for example, there is one as shown in FIG.

[0003] That is, a vertical bracket 4 to which the cable 3 is connected is slidably supported on the base member 2, and a brake lever 5 is tiltably movable near an extension of the vertical bracket 4 in the vertical direction. The manual brake device 1 is pivotally attached, and a middle mechanism of the brake lever 5 and the vertical bracket 4 are connected by a relay member 6 to form a toggle mechanism.

[0004]

However, in the conventional manual brake device using such a toggle mechanism, as shown in FIG. 5 (B), the lever ratio is fixed at a constant value by a link constituting the toggle mechanism. Therefore, there is a problem that it is difficult to set a desired operation force.

In addition, the brake does not lock unless the brake lever is operated until it exceeds the dead point, and a considerable force is required to go over the dead point.

The present invention has been made in view of such a conventional problem, and does not use a toggle mechanism, but a combination of a cam formed in a brake lever and a trunnion pin driven by the cam. It is an object of the present invention to provide a manual brake device which can be freely set and can easily and surely lock a brake.

[0007]

Means for achieving the object are as follows.

[1] A base member (20) and a brake lever (3) pivotally attached to the base member (20) so as to be able to be turned upside down.
0) and a cable connecting mechanism (40) to which the cable (C) is connected.
0), the base member (20) has a longitudinal groove (21,
21) is drilled and the brake lever (30) is pivotally attached to the base member (20) while the longitudinal grooves (21,
21) and an arcuate cam portion (3)
1, 31) and a lock mechanism (50) for releasably fixing the brake lever (30) and the cable connection mechanism (40), and the cable connection mechanism (40) is provided with the cam portion (31). , 31) and both ends are bridged to the cam portions (31, 31) where they intersect so as to be movable along the vertical grooves (21, 21), and the both ends (42a, 42a) A trunnion pin (42) inserted into the longitudinal groove (21), an intermediate rod (43) having one end side orthogonal to an intermediate position of the trunnion pin (42), and the cable (C) are mounted. And a cable bracket (45) pivotally attached to the other end of the intermediate rod (43).

[2] A base member (20) and a brake lever (3) pivotally attached to the base member (20) so as to be capable of falling.
0) and a cable connecting mechanism (40) to which the cable (C) is connected.
0), the base member (20) has a longitudinal groove (21,
21) is drilled and the brake lever (30) is pivotally attached to the base member (20) while the longitudinal grooves (21,
21) and an arcuate cam portion (3)
1, 31) wherein the distance between the brake lever (30) and the portion pivotally attached to the base member (20) is different over the entire length of the cam portion (31, 31); (30) and the cable connection mechanism (40)
And a lock mechanism (50) for releasably fixing the cam portion (3).
1, 31) and rollers (44, 44) provided on both sides where they intersect so as to be movable along the vertical grooves (21, 21), and are mounted on the cam portions (31, 31), and Insert both ends (42a, 42a) into the longitudinal grooves (21, 2
1) a trunnion pin (42) inserted into the trunnion pin (42), an intermediate rod (43) attached to the trunnion pin (42) so as to be perpendicular to an intermediate position thereof, and the intermediate rod for attaching the cable (C). And a cable bracket (35) pivotally attached to the other end of the manual brake device (43).
0).

[3] The lock mechanism (50) is provided with a release button (5) provided at the front end of the brake lever (30).
1) and a release rod (53) on which the coil springs (52, 52) are mounted, a lock plate support (55) mounted displaceably along the release rod (53), and a lock plate support ( 55) rotatably supported,
A lock plate (54) for pressing the trunnion pin (42) by the resilience of the coil springs (52, 52).
Manual brake device as described in.

Next, the operation will be described.

In the manual brake device (10), the trunnion pin (4) connected to the brake lever (30) when the brake is completely released.
The position where 2) abuts on the cam portions (31, 31) is the end on the side where the distance between the brake lever (30) and the portion pivotally attached to the base member (20) is the shortest. The longitudinal groove (21, 21) of the trunnion pin (42)
Is the end on the side where the distance between the brake lever (30) and the base member (20) is shortest, and the trunnion pin (4) is located at that position.
The cable (C) connected to 2) is in a state where its tension is the smallest.

From the state, the brake lever (30)
, The trunnion pin (42) is displaced toward the other end of the cam portion (31, 31). In addition, since the cable (C) is simultaneously displaced toward the other end of the vertical groove (21, 21), the tension of the cable (C) continuously increases as the brake lever (30) is pulled up. When the trunnion pin (42) is displaced to the other end of the cam portion (31, 31), it is also located at the other end of the vertical groove (21, 21). Is the largest.

The brake lever (30) can be locked when the lock plate (54) of the lock mechanism (50) abuts against the trunnion pin (42) and is pressed. This lock is applied to the brake lever (3
Release button (51) of the lock mechanism (50) provided in 0)
The brake can be released by operating the brake lever (30) while pressing down.

Thus, the lever ratio can be freely set by combining the shape design of the cam portions (31, 31) and the trunnion pins (42), and at the same time, the brake can be easily and reliably locked. is there.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 5 show one embodiment of the present invention.

As shown in FIG. 1, in the manual brake device 10, a brake lever 30 is pivotally attached to a base member 20 so as to be capable of falling, and a cable connecting mechanism 40 to which a cable C is connected is interlocked with the operation of the brake lever 30. To be incorporated.

The base member 20 is formed by forming a base body 22 in a substantially U-shape upward from a bottom portion 23, and welding and fixing a mounting bracket 24 near the bottom portion 23.

The base body 22 of the base member 20 has longitudinal grooves 21 and 21 formed therein. The lower ends 21a, 21a of the vertical grooves 21, 21 are substantially circular and are formed so as to form a space larger than the upper part. At the upper corner of the base body 22, a stopper 60 is attached, which is supported by the brake lever 30 when the brake is released, as will be described later. The stopper 60 is a cylindrical body having a length that can be interposed in the base body 22 formed in a substantially U-shape, and is made of a material capable of absorbing an impact, such as rubber. The stopper 60 has a tube 61 made of a hard material such as metal or hard plastic having an outer diameter substantially the same as the diameter of the inner wall thereof and having a length substantially the same as the entire length of the stopper 60. Tube 6
The bolt 62 having a shank smaller in diameter than the inner diameter of the stopper 60 inserted into the base body 2 is passed through the tubular body 61, and the nut 63 and the washer 64 are used for the base body 2.
2 is attached.

The brake lever 30 is provided with openings 32, 32 near the end of its base, so that the pipe body 33 can be opened.
2 and 32, the bolt 34 and the nut 3
5 and a washer 36 are pivotally attached to attachment openings 25, 25 formed in the base body 22.

Above the mounting openings 25, 25, arc-shaped cam portions 31, 31 are formed. 2 and 3
, The lower ends 31a of the cams 31 and 31 are closest to the mounting portion with the base body 22 which is the rotation axis of the brake lever 30, and the distance is continuously longer to the upper ends 31b. It is pierced so that it becomes.

The positions of the cam portions 31, 31 formed at the base of the brake lever 30, and the vertical grooves 2 on the base body 22.
When the brake lever 30 is attached to the base body 22, the cam portions 31, 31 and the
There is a positional relationship such that 1 and 21 intersect. More specifically, the brake lever 30 is connected to the base body 22.
The lower end portions 31a, 31a of the cam portions 31, 31 are in a state of being tilted to a position where they come into contact with the stopper 60 attached to the
And the lower ends 21a, 21a of the longitudinal grooves 21, 21 overlap,
When the brake lever 30 is raised, the cam portions 31, 3
1 and the upper ends of the vertical grooves 21 and 21 overlap with each other, and when the brake lever 30 is at the above-described intermediate position, the cam portions 31 and 31 and the vertical grooves 21 and 21 intersect at the respective intermediate positions. It is arranged to be.

A handle 37 is provided at the tip end of the brake lever 30 so as to be easily gripped.

A cable connecting mechanism 40 for connecting cables is provided inside the base side of the brake lever 30.
A brake lever 30 and a cable connecting mechanism 40 are provided inside the distal end side of the brake lever 30 provided with the handle 37.
And a lock mechanism 50 for releasably fixing.

The cable connection mechanism 40 includes a trunnion pin 42, an intermediate rod 43, and a cable bracket 45. The trunnion pin 42 is provided with a roller stopper 42b at an intermediate portion of the cylindrical portion. A through hole for inserting a bolt 46 used to fix the intermediate rod 43 in a direction orthogonal to the trunnion pin 42 is formed in the roller stopper 42b. Roller stopper 4
Rollers 4 are provided on both sides of the trunnion pin 42 at the boundary of 2b.
4 and 44 are provided.

The diameter of the rollers 44, 44 is
1, and is arranged so as to rotatably abut on one side of the cam portions 31 when the cable connecting mechanism 40 is mounted inside the base side of the brake lever 30. ing. Further, both ends 42a, 42a of the trunnion pin 42 penetrate the longitudinal grooves 21, 21.

An intermediate rod 43 is attached to the roller stopper 42b.
Is attached to the trunnion pin 42 at right angles by bolts 46. At the other end of the intermediate rod 43, a cable bracket 45 for attaching the cable C is pivotally attached by a pivot pin.

As shown in FIGS. 1 to 4, the lock mechanism 50 is provided at the front end of the handle 37 so as to be operated only by the thumb of the hand holding the handle 37 of the brake lever 30. A button 51, a release rod 53 having a distal end connected to the release button 51 and having coil springs 52, 52 mounted thereon, and a lock plate support portion mounted to be displaceable along the release rod 53 at the rear end side of the release rod 53. 55,
The lubricating force of the coil spring 52 abuts the rollers 44 provided on the trunnion pin 42 so as to be rotatably supported by the lock plate support 55, and the trunnion pin 42
And a lock plate 54 for pressing the lock plate.

Openings h1 and h1 are formed in the lock plate 54 closer to the rear end than in the center, and openings h2 and h2 are formed in the rear end 54a. The lock plate 54 is pivotally attached to the base of the brake lever 30 by a pivot pin 38.

The lock plate support 55 is provided with support pins 56 for supporting the lock plate 54 through openings h2, h2 provided in the rear end 54a of the lock plate 54.

Next, the operation will be described.

FIG. 2 shows a state where the brake lever 30 is raised. As the brake lever 30 is pulled, the tension of the cable C increases continuously, and the brake works accordingly. The brake lever 30 is configured such that the trunnion pin 42 is
31b and the vertical grooves 21, 2 of the base body 22.
It stops where it abuts the top position of 1. At this time, the trunnion pin 42 is in the most raised state, and therefore, the tension of the cable C attached to the cable bracket 45 is the maximum. When the pulling of the brake lever 30 is stopped in this state, the tension of the cable C acts in the direction of returning the brake lever 30 via the trunnion pin 42, but when the brake lever 30 returns slightly, the roller 44 provided on the trunnion pin 42 , 44 are in contact with the front end 54b of the lock plate 54. The lock plate 54 is provided at the lower end portions 31a, 31 of the cam portions 31, 31.
The brake lever 30 does not rotate in the direction toward
Can be stopped. Thus, in this state, even if the trunnion pin 42 is pulled by the tension of the cable C, the trunnion pin 42 does not move toward the lower end portions 31a, 31a of the cam portions 31, 31. Therefore, the trunnion pin 42 is connected to the lower end 2 of the vertical groove 21, 21.
It is possible to maintain the state in which the brake is applied to the maximum without moving toward 1a and 21a.

When the brake is released, as shown in FIG. 3, the brake lever 30 is once pulled by about 2 ° to release the force applied to the lock plate 54 from the rollers 44, 44.
In this state, the release button 51 disposed at the front end of the handle 37
Is pushed with the thumb of the hand holding the handle 37. Then, the rear end portion 54 of the lock plate 54 is
a and 54a are pushed so as to rotate clockwise in FIG. 2 around the pivot pin 38 as a rotation axis. Release rod 5
3 is completely pushed in, the front end 54b of the lock plate 54 is lifted to a position beyond the rollers 44, 44 as shown in FIG.

Next, if the brake lever 30 is returned by 2 ° or more in a direction in which the release lever 51 is pushed in while the brake lever 30 is pulled by the tension of the cable C, the position of the rollers 44, 44 is more than that of the front end 54b of the lock plate 54 in the cam portion 31. , 31 are located on the lower end portions 31a, 31a side, so that it is sufficient to release the finger from the release button 51 and return to the direction in which the brake lever 30 is pulled.

As the brake lever 30 returns, the rollers 44, 44 move toward the lower ends 31a, 31a of the cams 31, 31, respectively.
Side, and the trunnion pin 42 is
1, 21 to the lower ends 21a, 21a. Accordingly, the tension of the cable C connected to the cable connecting mechanism 40 decreases, and the brake is released. Roller 4
When the trunnion pins 42 reach the lower ends 21a, 21a of the longitudinal grooves 21, 21, the cable C has no tension or the tension is low. Even if there is, the brake is set so that it does not work, so the brake is completely released.

As described above, since the cam portions 31, 31 and the trunnion pins 42 provided with the rollers 44, 44 are used, the lever ratio of the manual brake device according to one embodiment of the present invention is as shown in FIG. As shown by the curve A in (B), it can be set so as to gradually increase as the operation angle increases. The curve B shows a typical example of a lever ratio of a conventional manual brake device using a toggle link. The toggle ratio is such that the lever ratio suddenly increases slightly before the maximum operation angle. It was an inevitable characteristic.

FIG. 5A shows an example of the value of the operation force with respect to the operation angle. In the case of the manual brake device according to one embodiment of the present invention, the brake is smooth as shown by the curve A. This indicates that the required change in the operation force is gentle, indicating good operability.

In this embodiment, the cam portions 31 and 31 and the trunnion pins 42 provided with the rollers 44 and 44 are provided without using the toggle link. The setting can be freely set, and the necessary operating force can be set freely.

Further, the brake can be easily and reliably locked.

[0041]

According to the manual brake device according to the present invention, since the degree of freedom in setting the lever ratio is large, it is possible to produce a device that can be adapted to various use conditions.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a manual brake device according to one embodiment of the present invention.

FIG. 2 is a side view showing a manual brake device according to one embodiment of the present invention.

FIG. 3 is a side view showing a part of the manual brake device according to one embodiment of the present invention.

FIG. 4 is a plan view showing a manual brake device according to an embodiment of the present invention.

FIG. 5A is a graph showing operating forces of a manual brake device according to an embodiment of the present invention and a conventional manual brake device, and FIG. 5B is a graph showing a manual brake device according to an embodiment of the present invention and a conventional manual brake device; 6 is a graph showing a lever ratio of the device.

FIG. 6 is a side view showing a conventional manual brake device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Manual brake device 20 ... Base member 21 ... Vertical groove 30 ... Brake lever 31 ... Cam part 40 ... Cable coupling mechanism 42 ... Trunnion pin 42a ... End of trunnion pin 43 ... Intermediate rod 44 ... Roller 45 ... Cable bracket 50 ... Lock mechanism 51 Release button 52 Coil spring 53 Release rod 54 Lock plate 55 Lock plate support C Cable

Claims (3)

[Claims] 1. A manual brake device comprising: a base member; a brake lever pivotally attached to the base member so as to be capable of falling; and a cable connecting mechanism to which a cable is connected. An arcuate cam portion that is drilled so as to intersect with the longitudinal groove while the brake lever is pivotally attached to the base member;
A lock mechanism for releasably fixing the brake lever and the cable connection mechanism, wherein the cable connection mechanism is configured such that both ends thereof intersect with each other so as to be movable along the cam portion and the vertical groove. A trunnion pin that is bridged over the cam portion, and the both ends are inserted into the vertical groove, and an intermediate rod having one end attached to be orthogonal to an intermediate position of the trunnion pin,
And a cable bracket pivotally attached to the other end of the intermediate rod to attach the cable. 2. A manual brake device comprising: a base member; a brake lever pivotally attached to the base member so as to be capable of falling; and a cable connecting mechanism to which a cable is connected. Wherein the brake lever is an arcuate cam portion drilled so as to intersect the vertical groove while being pivotally attached to the base member, and wherein the brake lever is pivotally attached to the base member. And a lock mechanism for releasably fixing the brake lever and the cable connection mechanism, the cable connection mechanism comprising: Rollers provided on both sides where they intersect so that they can move along the groove are placed on the cam portion, and both ends are inserted into the vertical groove with trunnion pins, and one end is A manual brake device comprising: an intermediate rod mounted to be orthogonal to an intermediate position of a trunnion pin; and a cable bracket pivotally mounted to the other end of the intermediate rod for mounting the cable. . 3. A lock mechanism comprising: a release rod provided with a release button and a coil spring provided at a front end of the brake lever; a lock plate supporter displaceably mounted along the release rod; 3. The manual brake device according to claim 1, further comprising: a lock plate rotatably supported by the plate support portion and pressing the trunnion pin by a repulsive force of the coil spring. 4.