JP4050809B2 - Manual brake device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manual brake device including a base member, a brake lever pivotally attached to the base member, and a cable connecting mechanism to which a cable is connected.
[0002]
[Prior art]
Conventionally, as this type of manual brake device, for example, there is one as shown in FIG.
[0003]
That is, the longitudinal bracket 4 to which the cable 3 is coupled is slidably supported on the base member 2, and the brake lever 5 is pivotally mounted in the vicinity of an extension line of the longitudinal bracket 4 in the longitudinal direction. The manual brake device 1 has a toggle mechanism in which an intermediate portion of the brake lever 5 and the longitudinal movement bracket 4 are connected by a relay member 6.
[0004]
[Problems to be solved by the invention]
However, in the conventional manual brake device using such a toggle mechanism, as shown in FIG. 5B, the lever ratio is fixed by the link constituting the toggle mechanism. There was a problem that it was difficult.
[0005]
In addition, the brake does not lock unless the brake lever is operated until the dead point is exceeded, and there is a problem that a considerable force is required to pass the dead point.
[0006]
The present invention has been made paying attention to such conventional problems, and the lever ratio can be freely set by a combination of a cam drilled in the brake lever and a trunnion pin driven by the cam without using a toggle mechanism. It is another object of the present invention to provide a manual brake device that can easily and reliably lock a brake.
[0007]
[Means for Solving the Problems]
The gist for achieving such an object lies in the following sections.
[0008]
[1]
A manual brake comprising a base member (20), a brake lever (30) pivotably attached to the base member (20), and a cable coupling mechanism (40) coupled to a cable (C) In the device (10):
The base member (20) is provided with longitudinal grooves (21, 21),
The brake lever (30) is arcuate cam portions (31, 31) drilled so as to intersect the longitudinal grooves (21, 21) in a state of being pivotally attached to the base member (20), and the brake lever A locking mechanism (50) for releasably fixing (30) and the cable coupling mechanism (40);
Said cable connecting mechanism (40), the said cam portions (31, 31) and both end portions where the intersection thereof so as to be movable along said at the longitudinal grooves (21, 21) (42a, 42a) cam A trunnion pin (42) spanning the portion (31, 31) and having both end portions (42a, 42a) inserted into the longitudinal groove (21, 21), and one end side between the trunnion pin (42) an intermediate rod which is mounted so as to be orthogonal to the position (43), said cable bracket (45) mounted pivotally to the other end of the intermediate rod (43) and comprising a for attaching said cable (C) ,
The lock mechanism (50) includes a release button (51) provided at the front end of the brake lever (30), a release rod (53) fitted with a coil spring (52, 52), and the release rod (53). The lock plate support part (55) mounted so as to be displaceable, and supported by the lock plate support part (55) so as to be rotatable, and the trunnion pin (42) by the elastic force of the coil springs (52, 52). And a lock plate (54) for holding the manual brake device (10).
[0009]
[2]
A manual brake comprising a base member (20), a brake lever (30) pivotably attached to the base member (20), and a cable coupling mechanism (40) coupled to a cable (C) In the device (10):
The base member (20) is provided with longitudinal grooves (21, 21),
The brake lever (30) is an arcuate cam portion (31, 31) drilled so as to intersect the longitudinal groove (21, 21) in a state of being pivotally attached to the base member (20), brake lever (30) said base member cam portion different over the entire length of the distance between the pivotally mounted portion (20) of the cam portion (31, 31) and (31, 31), said brake lever (30) And a locking mechanism (50) for releasably fixing the cable connecting mechanism (40),
Said cable connecting mechanism (40), said cam portions (31, 31) and rollers provided on both sides at the intersection of those so as to be movable along said at the longitudinal grooves (21, 21) (44, 44) Is mounted on the cam part (31, 31) and both ends (42a, 42a) are inserted into the longitudinal groove (21, 21), and one end side of the trunnion pin (42). An intermediate rod (43) attached so as to be orthogonal to the intermediate position, and a cable bracket (35) attached pivotally to the other end of the intermediate rod (43) for attaching the cable (C). And
The lock mechanism (50) includes a release button (51) provided at the front end of the brake lever (30), a release rod (53) fitted with a coil spring (52, 52), and the release rod (53). The lock plate support part (55) mounted so as to be displaceable, and supported by the lock plate support part (55) so as to be rotatable, and the trunnion pin (42) by the elastic force of the coil springs (52, 52). And a lock plate (54) for holding the manual brake device (10).
[0011]
Next, the operation will be described.
[0012]
In the manual brake device (10), the position where the trunnion pin (42) connected to the brake lever (30) contacts the cam portion (31, 31) when the brake is completely released is The brake lever (30) is the end portion on the side having the shortest distance from the portion pivotally attached to the base member (20), and at the same time, the position of the trunnion pin (42) in the longitudinal groove (21, 21) is The cable (C) which is also the end portion on the side having the shortest distance from the portion where the brake lever (30) is pivotally attached to the base member (20) and is connected to the trunnion pin (42) at that position. ) Is in the state where the tension is the smallest.
[0013]
When the brake lever (30) is pulled up from this state, the trunnion pin (42) is displaced toward the other end of the cam portions (31, 31). Moreover, since it is displaced toward the other end of the longitudinal groove (21, 21) at the same time, 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 longitudinal groove (21, 21). At this time, the tension of the cable (C) Is the maximum.
[0014]
The brake lever (30) can be locked when the lock plate (54) of the lock mechanism (50) abuts against the trunnion pin (42) and stops. This lock can be released by operating the brake lever (30) while pushing the release button (51) of the lock mechanism (50) provided on the brake lever (30).
[0015]
Thus, the lever ratio can be freely set by combining the shape design of the cam portions (31, 31) and the trunnion pin (42), and at the same time, the brake can be locked easily and reliably.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0017]
1 to 5 show an embodiment of the present invention.
[0018]
As shown in FIG. 1, the manual brake device 10 pivotally attaches a brake lever 30 to the base member 20 so that it can be tilted, and a cable connecting mechanism 40 to which the cable C is connected is interlocked with the operation of the brake lever 30. It is built in.
[0019]
The base member 20 is formed by forming a base body 22 upward from the bottom 23 in a substantially U shape and fixing a mounting bracket 24 near the bottom 23 by welding.
[0020]
Longitudinal grooves 21 and 21 are formed in the base body 22 of the base member 20. The lower end portions 21a and 21a of the longitudinal grooves 21 and 21 are formed in a substantially circular shape so as to form a space larger than the upper portion thereof. A stopper 60 is attached to the upper corner of the base body 22 so that the brake lever 30 contacts and is supported 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 inner wall diameter and a length substantially the same as the stopper 60. The stopper 60 in which the tube body 61 is inserted is passed through the tube body 61 with a bolt 62 having a shank having a diameter smaller than the inner diameter thereof, and is attached to the base body 22 by a nut 63 and a washer 64.
[0021]
The brake lever 30 has openings 32, 32 formed near the end of the base thereof, and the base is formed by a bolt 34, a nut 35, and a washer 36 in a state where the pipe body 33 is passed through the openings 32, 32. The main body 22 is pivotally attached to attachment openings 25 and 25 formed in the body 22.
[0022]
Arc-shaped cam portions 31, 31 are formed above the mounting openings 25, 25. As clearly shown in FIGS. 2 and 3, the shape of the cam portions 31, 31 is closest to the attachment portion with the base body 22 where the lower end portion 31 a serves as the rotation shaft of the brake lever 30, and continues to the upper end portion 31 b. It is drilled to increase the distance.
[0023]
The positions where the cam portions 31, 31 are drilled at the base of the brake lever 30 and the positions where the vertical grooves 21, 21 are drilled on the base body 22 are the same as those when the brake lever 30 is attached to the base body 22. 31 and the longitudinal grooves 21 and 21 are in a positional relationship such that they intersect. More specifically, when the brake lever 30 is tilted to a position where it comes into contact with the stopper 60 attached to the base body 22, the lower ends 31a, 31a of the cam portions 31, 31 and the lower ends 21a of the longitudinal grooves 21, 21 are provided. When the brake lever 30 is raised and the upper end portions 31b and 31b of the cam portions 31 and 31 are overlapped with the upper end portions of the longitudinal grooves 21 and 21, and the brake lever 30 is at the intermediate position, the cam portion 31 and 31 and the longitudinal grooves 21 and 21 are arrange | positioned so that it may cross | intersect in each intermediate position.
[0024]
A handle portion 37 formed so as to be easily gripped is provided on the distal end portion side of the brake lever 30.
[0025]
A cable connecting mechanism 40 to which a cable is connected is provided inside the base portion of the brake lever 30, and the brake lever 30, the cable connecting mechanism 40, and the like are provided inside the brake lever 30 provided with the handle portion 37. There is provided a lock mechanism 50 for releasably fixing.
[0026]
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. Rollers 44 and 44 are provided on both sides of the trunnion pin 42 with the roller stopper 42b as a boundary.
[0027]
The diameters of the rollers 44 and 44 are large enough to be accommodated in the arc-shaped perforated portions that are the cam portions 31 and 31, and one side of the cam portions 31 and 31 when the cable coupling mechanism 40 is attached to the inside of the base portion of the brake lever 30. It is arrange | positioned so that it may contact | abut to rotation. Further, both end portions 42 a and 42 a of the trunnion pin 42 penetrate through the longitudinal grooves 21 and 21.
[0028]
One end of the intermediate rod 43 is attached to the roller stopper 42 b by a bolt 46 so as to be orthogonal to the trunnion pin 42. A cable bracket 45 for attaching the cable C is pivotally attached to the other end of the intermediate rod 43 by a pivot pin.
[0029]
As shown in FIGS. 1 to 4, the lock mechanism 50 includes a release button 51 disposed at the front end of the handle portion 37 so that the lock mechanism 50 can be operated only with the thumb of the hand holding the handle portion 37 of the brake lever 30. A release rod 53 having a distal end connected to the release button 51 and fitted with coil springs 52, 52; a lock plate support 55 fitted to be displaceable along the release rod 53 on the rear end side of the release rod 53; And a lock plate 54 that is rotatably supported by the lock plate support portion 55, abuts against rollers 44, 44 provided on the trunnion pin 42 by the elastic force of the coil spring 52, and holds the trunnion pin 42. Yes.
[0030]
In the lock plate 54, openings h1 and h1 are formed closer to the rear end than the center portion, and openings h2 and h2 are formed in the rear end portion 54a. The lock plate 54 is pivotally attached to the base of the brake lever 30 by a pivot pin 38.
[0031]
The lock plate support portion 55 is provided with support pins 56 for supporting the lock plate 54 through the openings h2 and h2 provided in the rear end portion 54a of the lock plate 54.
[0032]
Next, the operation will be described.
[0033]
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 is activated accordingly. The brake lever 30 stops when the trunnion pin 42 contacts the upper end portions 31 b and 31 b of the cam portions 31 and 31 and contacts the uppermost position of the longitudinal grooves 21 and 21 of the base body 22. At this time, the trunnion pin 42 is in the most lifted 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 works in a direction to return the brake lever 30 via the trunnion pin 42, but the roller 44 provided on the trunnion pin 42 when the brake lever 30 returns slightly. 44, the front end 54b of the lock plate 54 abuts. Since the lock plate 54 does not rotate in the direction toward the lower end portions 31 a and 31 a of the cam portions 31 and 31, it can hold the brake lever 30. 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 and 31a of the cam portions 31 and 31. Therefore, the trunnion pin 42 does not move toward the lower end portions 21a and 21a of the longitudinal grooves 21 and 21, and the state where the brake is effective can be maintained.
[0034]
When releasing the brake, as shown in FIG. 3, the brake lever 30 is once pulled by about 2 ° to remove the force applied to the lock plate 54 from the rollers 44, 44, and in this state, the brake lever 30 is disposed at the front end of the handle portion 37. The release button 51 is pushed in with the thumb of the hand holding the handle portion 37. Then, the rear end portions 54a and 54a of the lock plate 54 are pushed by the release rod 53 so as to rotate in the clockwise direction in FIG. In a state where the release rod 53 is fully pushed, the front end portion 54b of the lock plate 54 is lifted up to a position beyond the rollers 44, 44 as shown in FIG.
[0035]
Next, if the brake lever 30 is returned by 2 ° or more in the direction of being pulled by the tension of the cable C while the release button 51 is pushed in, the positions of the rollers 44 and 44 are higher than those of the front end portion 54 b of the lock plate 54. Since it is on the lower end 31a, 31a side, it is only necessary to release the release button 51 and return it to the direction in which the brake lever 30 is pulled.
[0036]
As the brake lever 30 returns, the rollers 44, 44 move toward the lower end portions 31 a, 31 a of the cam portions 31, 31, and the trunnion pin 42 moves down to the lower end portions 21 a, 21 a of the longitudinal grooves 21, 21. Accordingly, the tension of the cable C coupled to the cable coupling mechanism 40 is reduced, and the brake is released. When the rollers 44, 44 reach the lower end portions 31a, 31a of the cam portions 31, 31, and the trunnion pin 42 reaches the lower end portions 21a, 21a of the longitudinal grooves 21, 21, there is no tension in the cable C. The brake is completely released because it is set to the extent that the brake does not work.
[0037]
Thus, since it comprised using the cam parts 31 and 31 and the trunnion pin 42 which provided the rollers 44 and 44, the lever ratio of the manual brake apparatus which is one form of this invention is shown to (B) of FIG. As shown by the curve A in FIG. 8, it can be set 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 lever ratio is abruptly increased slightly before the maximum operating angle. It was an inevitable characteristic.
[0038]
The example shown in FIG. 5A illustrates 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 operating force is moderate, and this indicates good operability.
[0039]
In this embodiment, the cam portions 31 and 31 and the trunnion pin 42 provided with the rollers 44 and 44 are provided without using the toggle link, so that the lever ratio can be freely set by combining these design aspects in various ways. The required operating force can be set freely.
[0040]
In addition, the brake can be easily and reliably locked.
[0041]
【The invention's effect】
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 devices that correspond to various use conditions.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a manual brake device according to an 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 a 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.
5A is a graph showing the operating force of the manual brake device according to the embodiment of the present invention and the conventional manual brake device, and FIG. 5B is a graph showing the manual brake device according to the embodiment of the present invention and the conventional manual brake. It is a graph which shows the lever ratio of an apparatus.
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 connection mechanism 42 ... Trunnion pin 42a ... End part 43 of trunnion pin ... 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 (2)

In a manual brake device comprising a base member, a brake lever pivotably attached to the base member, and a cable coupling mechanism coupled to a cable,
The base member is provided with a longitudinal groove,
The brake lever has an arcuate cam portion drilled so as to intersect the longitudinal groove while being pivotally attached to the base member, and a lock mechanism for releasably fixing the brake lever and the cable connecting mechanism. And
Said cable coupling mechanism, the two ends where the crossing thereof so as to be movable along the said longitudinal groove and the cam portion hung on the cam portion, and, trunnion inserting the said end portions in said longitudinal groove A pin, an intermediate rod having one end side attached perpendicularly to an intermediate position of the trunnion pin, and a cable bracket pivotally attached to the other end side of the intermediate rod for attaching the cable ;
The lock mechanism includes a release button provided at a front end of the brake lever and a release rod attached with a coil spring, a lock plate support portion mounted so as to be displaceable along the release rod, and a lock plate support portion. A manual brake device comprising: a lock plate that is movably supported and that holds the trunnion pin by an elastic force of the coil spring . In a manual brake device comprising a base member, a brake lever pivotably attached to the base member, and a cable coupling mechanism coupled to a cable,
The base member is provided with a longitudinal groove,
The brake lever is an arcuate cam portion drilled so as to intersect the longitudinal groove in a state of being pivotally attached to the base member, and a distance from a portion where the brake lever is pivotally attached to the base member It has a cam portion which varies over the entire length of the cam portion, a locking mechanism for releasably securing the said and the brake lever cable coupling mechanism, and
Said cable coupling mechanism, placing the rollers provided on both sides at the intersection of those so as to be movable along said cam portion and the longitudinal groove in the cam portion, and, by inserting the both end portions in the longitudinal groove A trunnion pin, an intermediate rod having one end side attached so as to be orthogonal to an intermediate position of the trunnion pin, and a cable bracket pivotally attached to the other end side of the intermediate rod for attaching the cable ;
The lock mechanism includes a release button provided at a front end of the brake lever and a release rod attached with a coil spring, a lock plate support portion mounted so as to be displaceable along the release rod, and a lock plate support portion. A manual brake device comprising: a lock plate that is movably supported and that holds the trunnion pin by an elastic force of the coil spring .

Images