JPH04126647A - Parking brake control system - Google Patents

Abstract

PURPOSE:To enhance convenience in use by lowering a control lever independently to a housing position, taking advantage of relationship between a cam groove and an engaging pin engaging with the cam groove, when the control lever is oscillated to an erected position in order to restrain a supporting plate at a pulled-up position. CONSTITUTION:When a control lever 30 is oscillated to an erected position, a needle tip part 37 of a release link 35 pulls a supporting plate 40 up via a claw member 50. The claw member 50 is engaged in succession with the teeth of a ratchet plate 20a until it is engaged with a high ranking tooth, thereby restraining the supporting plate 40 at a pulled-up position. Thus, a brake cable is held in a brake state. If the control lever 30 is pulled down in this state, a projected part 38 of a needle shaft part 36 of the release link 35 slides down from an operation-end 51 of the claw member 50, so that the needle shaft part 36 comes off the operation-end 51. Thus, the control lever 30 is lowered independently, centering around an engaging pin 21, and an engaging pin 45 moves relatively to an after-end of an upper cam 32. If the control lever 30 is pulled down further, the control lever 30 oscillates, centering around the engaging pin 45, to come into a stored state.

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention is characterized in that an operating lever is supported on a base member fixed to a vehicle body so as to be able to be raised and lowered, and braking is applied when the operating lever is raised up. This invention relates to a parking brake device.

BACKGROUND OF THE INVENTION In recent years, it has been desired for this type of bark brake device to be capable of independently lowering the operating lever, with the main purpose of improving safety.

For example, an operating lever is swingably supported by a pivot on a base member, a ratchet plate is fixed to the base member, a support plate is swingably supported on the base member, and the ratchet plate is engaged with the support plate. When a pawl member is attached and the operated end of the pawl member is pushed in with the operating member, the pawl member is released from engagement, and when the operating lever is tilted without operating the operating member, the engagement between the pawl member and the ratchet plate is released. A device has been proposed in which the operating lever is returned to the laid down position and stored while being held in the engaged state without having to do so.

``Problem to be Solved by the Invention'' However, in such a parking brake device, the control lever swings around a pivot, and the swing trajectory of the control lever is determined by the position of the pivot. If it is difficult to install the pivot in the specified position due to the installation space, the swing trajectory may be different from the desired one, and the operating lever cannot be stored properly, making it difficult to use. There was a problem.

The present invention has been made in view of the problems associated with such technology, and an object of the present invention is to provide a parking brake device that is extremely easy to use.

``Means for Solving the Problems'' The gist of the present invention for achieving the above object is as follows: 1. A base member fixed to the vehicle body side is operable to support the lever so that it can be raised and lowered; In the parking brake device, the ratchet plate is fixed to the base member, and a base of the support plate is pivotably supported on the base member, and the support plate has: A pawl member that engages with the ratchet plate is attached, a brake cable is connected to the support plate, and an operating member that operates to disengage the pawl member is attached to the operating lever, and the operating lever is stored alone in a reclined position. In order to guide the operation lever to the position, one of a first engagement pin and a first cam groove in which the first engagement pin is fitted so as to be relatively movable is provided at the base of the operating lever, and the first cam groove corresponding to the base is provided. The other of the first engagement pin and the first cam groove is provided on a stationary member such as a base member, and the second engagement pin and the second engagement pin are fitted with each other so as to be relatively movable. One of the two cam grooves is provided at the base of the operating lever, and the second engagement pin and the second cam groove are provided on the stationary side member.
A parking brake device comprising a cam groove and a cam groove.

2. The first cam groove is formed such that the first engagement pin is movable relative to the second engagement pin, and the second cam groove is formed so that the first engagement pin is centered around the first engagement pin. 2. The parking brake device according to claim 1, wherein the second engaging pin is formed to be movable relative to the second engaging pin.

"Operation" When the operating lever is in the collapsed position, it is engaged with the pawl member or the ratchet plate, the support plate is restrained in the depressed position, and the brake cable is pulled back and in a non-braking state.

When the operating lever is swung to the upright position, the support plate is pulled up and engaged with the pawl member or ratchet plate, so that the support plate is restrained in the raised position and the brake cable is pulled out, resulting in a braking state.

When the support plate is restrained in the raised position, when the operating lever is collapsed alone, the first engagement pin is guided to the first cam groove, and the second engagement pin is guided to the second cam groove. It is then stored with the operating lever folded down.

In a device in which the first engaging pin moves relatively within the first cam groove with the second engaging pin as the center, when the operating lever is laid down, the operating bar or the first engaging pin first moves. Second
It swings in two stages around one of the engagement pins and later around the other engagement pin.

At this time, the first engagement pin and the second engagement pin come to move relatively within the first cam groove and the second cam groove, respectively.

"Embodiments" Various embodiments of the present invention will be described below based on the drawings. Incidentally, similar parts in various embodiments are given the same reference numerals and redundant explanations will be omitted.

1 to 6 show a first embodiment of the invention.

As shown in FIGS. 1 and 4, a base member 20 is fixedly provided on the vehicle body 10 side, and an engaging pin 2 is attached to the base member 20.
1 has been planted.

An upper cam groove 32 and a lower cam groove 32a are formed on the upper and lower sides of the base end 31 of the operating lever 30, respectively.

The engagement pin 21 is fitted into the lower cam groove 32a so as to be relatively movable.

A ratchet plate 20a is integrally fixed to the base member 20. The ratchet plate 20a has a plurality of teeth arranged in a circular arc centered on the engagement pin 21.

An apex portion 41 of a substantially triangular support plate 40 is swingably supported by the engagement pin 21 . An engagement pin 45 is fixed to one bottom corner 42 of the support plate 40.

The engagement pin 45 is fitted into the upper cam groove 32 so as to be relatively movable.

As shown in FIG. 2, the upper cam groove 32 is formed in an arc shape with a radius R1 centered on the engagement pin 21 located at the rear end of the lower cam groove 32a. Similarly, the lower cam groove 32a is formed in an arc shape with a radius R2 centered on the engagement pin 45 located at the rear end of the upper cam groove 32.

The engagement pin 45 protrudes to the side of the operating lever 30,
A brake cable (not shown) is connected to the tip of the engaging pin 45.

The other bottom corner 43 of the support plate 40 is provided with a pawl member 50 that engages and disengages the teeth of the ratchet plate 40.
or is swingably supported. The claw member 50 is formed with an operated end 51 that projects obliquely downward.

An elongated hole 33 is formed in the intermediate portion between the base end 31 and the distal end 31a of the operating lever 30, extending in the longitudinal direction from front to back. A pin member 34 is movably fitted into the elongated hole 33, and the upper end of a release link 35, which is an operating member, is connected to the operating lever 30 by the pin member 34.

The release link 35 is formed into a fishhook shape, and the release link 35 is formed in a fishhook shape, and the release link 35 is
6 and a needle tip portion 37 which is an engaging recess. Needle shaft portion 36
The middle part of the holder protrudes slightly rearward to form a protruding part 38. The width of the concave portion of the needle tip portion 37 is slightly wider than the width of the operated end 51 of the claw member 50.

A pin member 3 that comes into contact with the front edge of the needle shaft portion 36 of the release link 35 and serves as a fulcrum when the release link 35 swings.
9 is installed on the operating lever 30.

A small hole 37a is bored in the intermediate portion between the upper end of the release link 35 and the portion where the pin member 39 abuts. The tip 31a of the operating lever 30 is formed into a cylindrical shape, and a release rod 60 is inserted into the tip 31a so as to be movable back and forth. They are mated.

The release rod 60 is urged forward by a spring member 65. A release button 66 is fixed to the front end of the release port 60.

Next, the effect will be explained.

In FIG. 4, when the operating lever 30 is in the collapsed position, the pawl member 50 is engaged with the lower teeth of the ratchet plate 20a, and the support plate 40 is restrained in the depressed position.

As a result, the brake cable (not shown) is pulled back and is in a non-braking state.

At this time, the needle tip 37 of the release link 35 is attached to the claw member 5.
It is engaged with the operated end 51 of 0. In addition, the pin member 34 installed at the upper end of the release link 35 or the elongated hole 3
3, and the needle shaft portion 36 is pulled forward through the resource slot 60 by a spring member 65.

Furthermore, at this time, the engagement pin 21 is located at the rear end of the lower cam groove 32a, and the engagement pin 45 is located at the rear end of the lower cam groove 32a.
It is located at the front end of 2.

When the operation lever 30 is swung to the upright position, the needle tip 37 of the release link 35 is engaged with the operated end 51 of the claw member 50, so that the support plate 40 is moved through the claw member 50.
pull up.

The pawl member 50 meshes with the teeth of the ratchet plate 20a one after another, and eventually, as shown in FIG. 5, meshes with the upper tooth. At this time, since the operated end 51 of the claw member 50 is loosely engaged with the needle tip 37 of the release link 35, the operated end 51 is swung back and forth in the state engaged with the needle tip 37. move.

As a result, the support plate 40 is restrained in the raised position, and the braking state is maintained in which the brake cable (not shown) is pulled out.

When the operating lever 30 is lowered while the support plate 40 is restrained in the raised position, it slides down from the protrusion 38 of the needle shaft 36 of the release link 35 or the operated end 51 of the claw member 50. Needle tip portion 36 or claw member 50
It comes off from the operated end 51 of.

As a result, the operating lever 30 falls down independently with the engagement pin 21 as the center, and the engagement pin 45 moves relative to the rear end of the upper cam groove 32, as shown in FIG.

Furthermore, when the operating lever 30 is folded down, the operating lever swings around the engagement pin 45 and enters the retracted state as shown in FIG. 3. At this time, the engagement pin 21 moves relative to the front end of the lower cam groove 32a.

That is, the operating lever 30 initially swings around the engagement pin 21 and later around the engagement pin 45 in two stages.

In FIG. 5, when the support plate 40 is restrained in the raised position, when the release button 66 is pushed backward against the biasing force of the spring member 65, the release rod 60 causes the release link 35 to move backward. , and swings clockwise around the release link 35 or pin member 39.

As a result, the needle tip 37 of the release link 35 or the operated end 51 of the claw member 50 is pulled up, and the claw member 5
0 or clockwise to disengage from the ratchet plate 20a. Thereby, the support plate 40 can be pushed down.

When the operation lever 30 is lowered, the support plate 40 is pushed down together with the operation lever 30.

FIG. 7 shows a second embodiment of the invention.

That is, the upper cam groove 72 and the lower cam groove 72a are
They are each formed in an arc shape with radii R:l and R4 centered on a point O, which is an intermediate position between both cam grooves 72 and 72a.

This is advantageous when it is difficult to provide a pivot at the point O due to space constraints.

In the above embodiment, the upper cam groove 32 and the lower cam groove 32a are formed in the operating lever 30, and the engaging pins 21 and 45 are respectively fixed to the stationary member side such as the base member 20. It goes without saying that the present invention is not limited to this, and that, for example, the opposite aspect may be used.

"Effects of the Invention" According to the parking brake device according to the present invention, the operation lever can be independently lowered to the storage position due to the relationship between the cam groove and the engagement pin that is relatively movably fitted into the cam groove. Even if it is difficult to install the pivot at the pivot point of the control lever due to installation space, by appropriately setting the shape of the cam groove,
It is possible to draw the same swing locus as in the case where a pivot is provided, and the operating lever can be stored so as to draw a desired swing locus, making it easier to use.

Further, the first cam groove is formed such that the first engagement pin is movable relative to the second engagement pin, and the second cam groove is formed such that the first engagement pin is movable relative to the second engagement pin. If the two engagement pins are formed to be relatively movable, the operating lever can be functionally housed in two stages, further improving usability.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention,
Fig. 1 is a perspective view of the parking brake device, Fig. 2 is an explanatory diagram showing the relationship between the engagement pin and the cam groove, and Figs.
The figure is an explanatory view of the operation of the parking brake device, and FIG. 7 shows a second embodiment of the present invention, and is an explanatory view showing the relationship between the engagement pin and the cam groove. lO...Vehicle body 20...Base member 20a...Ratchet plate 21...Engagement pin (second engagement pin) 30...Operation lever 31...Base 32...Upper cam groove (second engagement pin) 1 cam groove) 32 a---
Lower cam groove (second cam*) 35...Release link (
Operation member) 40...Support plate 45...Engaging pin (first engagement pin) 50...Claw member 60...Release rod replacement 1 Sasaben Koki 7har 32a Fig. 7 2a

Claims (1)

[Scope of Claims] 1. A parking brake device in which an operating lever is supported so as to be able to rise and fall on a base member that is fixed to a vehicle body side, and braking is performed when the operating lever is erected, wherein the ratchet is attached to the base member. a plate is fixedly mounted, a base of the support plate is swingably supported on the base member, a pawl member that engages with the ratchet plate is attached to the support plate, and a brake cable is connected to the support plate. and an operating member for disengaging the pawl member is attached to the operating lever, and a first engagement pin and the first engagement pin are moved relative to each other in order to guide and move the operating lever independently to a collapsed storage position. A first cam groove movably fitted into the operating lever is provided at the base of the operating lever, and a stationary side member such as the base member corresponding to the base is provided with the first engagement pin and the first cam groove. and a second cam groove into which the second engaging pin and the second engaging pin fit relatively movably are provided at the base of the operation lever, and the stationary side member , the second engagement pin and the second
A parking brake device comprising a cam groove and a cam groove. 2. The first cam groove is formed such that the first engagement pin is movable relative to the second engagement pin, and the second cam groove is formed so that the first engagement pin is centered around the first engagement pin. 2. The parking brake device according to claim 1, wherein said second engagement pin is formed so as to be relatively movable.