JPH04126649A - Parking brake device - Google Patents

Abstract

PURPOSE:To avoid imprudent release of an operation-end of a claw member by providing a control member, which is engaged/disengaged with the operation- end of the claw member when a control lever is oscillated to an erected position or to a lowered-position, on the control lever side, thereby avoiding a case in that the operation-end of the claw member stays projected upward or stands in the way. CONSTITUTION:If a control lever 30 is oscillated to an erected position, a control lever 30 pulls a supporting plate 40 up via a pin member 42a, while a claw member 50 is engaged in succession with teeth of a ratchet plate 20a until it is engaged with a high ranking tooth. Thus, the supporting plate 40 is restrained in a pulled-up position, thereby maintaining a brake cable in a brake state. If the control lever 30 is pulled down in this state, a projected 38 of a hook stem part 36 of a release link 35 slides down from an operation- end 51 of the claw member 50, so that the hook tip part 36 comes off the operation-end 51. Thus, the control lever 30 goes down independently to come into a housed position. At he same time, a hook part 37a of a hook tip part 37 of the release link 35 is engaged with a projection 25 for locking of the ratchet plate 20a, so that the control lever 30 is restrained in the stored position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a base member fixed to a vehicle body that supports the base of an operating lever so as to be swingable, and allows the operating lever to be moved from a collapsed position to an upright position. This invention relates to a parking brake device that is raised to perform braking.

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

For example, a ratchet plate is fixed to the base member, a support plate is swingably supported by the base member, a pawl member that engages with the ratchet plate is attached to the support plate, and the pawl member has an upwardly protruding object to be operated. When the operated end of the pawl member is pushed in with the operating member, the pawl member is operated to release the 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. Instead, it has been proposed that the operating lever be returned to the folded position and stored while remaining in the engaged state.

"Problem to be Solved by the Invention" However, 1. In such a parking brake device, when the operation lever is stored in the collapsed position, the operated end of the pawl member remains in a position protruding upward from the ratchet plate, etc. However, if the operated end of the claw member is touched inadvertently, the claw member may become disengaged and pose a danger, and if a cover member is provided as a safety measure, it will increase the size.

The present invention has been made by focusing on the problems of the previous technology, and provides a bark brake device that can improve safety and can be made smaller. It is an object.

``Means for Solving the Problems'' The gist of the present invention for achieving the above object is to provide a base member fixed to the vehicle body that is operable to swingably support the base of the In a parking brake device in which braking is performed by raising an operating lever from a collapsed position to an upright position, a ratchet plate is fixed to the base member, and the base member is pivotably pivoted concentrically with the base member, A support plate is provided that swings together with the operation lever when the operation lever stands up, a brake cable is connected to the support plate, and a pawl member that engages with the ratchet plate is attached to the support plate, and the pawl member is attached to the support plate and engages with the ratchet plate. The operated end is provided protruding from the member.

An operating member for disengaging the claw member is attached to the operating lever, and the operating member is provided with an elastic force on the operated end of the claw member in order to urge the claw member in a direction to engage the ratchet plate. A push portion that comes into reciprocal abutment, and a push portion that engages with the operated end of the claw member to move the claw member in a direction opposite to the direction of engagement to perform a disengagement operation, and a push portion that engages with the operated end of the claw member and that is connected to the operating lever alone The parking brake device is characterized in that a hook portion is formed to be detached from the operated end of the pawl member in order to allow the pawl member to fall down.

"Operation" When the operating lever is in the collapsed position, the push portion of the operating member or the operated end of the pawl member is pushed in elastically, and the pawl member or the ratchet plate is engaged. The vehicle is also in a non-braking state with the brake cable pulled back.

When the operating lever is swung to the upright position, the support brake l- is swung in one direction together with the operating lever. When the support plate swings in one direction, the operated end of the claw member pushes the push part of the operating member against a small repulsive force, and the claw member swings and hits the teeth of the ratchet plate one after another. mesh. As a result, the support plate is restrained so as not to be able to swing, and the brake pad is pulled out, resulting in a braking state.

When the support plate is restrained so that it cannot swing, when the operating lever is laid down, the hook portion of the operating member comes off from the operated end of the claw member, and the operating lever is folded down and stored alone.

When the support plate is restrained so as not to be able to swing, when the operation member is operated and the operated end of the pawl member is swung by the hook portion, and the pawl member is disengaged from the ratchet plate, the support plate is released from its restraint. Then, when the control lever is lowered, the support plate swings in the other direction together with the control lever, returning to its original state.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 4 show one embodiment of the present invention.

As shown in FIGS. 1 and 3, a base member 20 is fixedly installed on the vehicle body lO side, and an operating lever 30 is pivoted to the base member 20 by a pivot 21 so as to be swingable between a collapsed position and an upright position. has been done.

A ratchet plate 20a is integrally fixed to the base member 20. The ratchet plate 20a is the pivot 2
It consists of a plurality of teeth arranged in a row on an arc centered at 1.

An apex portion 41 of a substantially triangular support plate 40 is swingably supported by the pivot 21 .

A pin member 42 is attached to one bottom corner 42 of the support plate 40.
A clevis member 43 is fixed to the pin member 42a.
A brake cable (not shown) is connected via the .

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 bored in the intermediate portion between the base end 31 and the distal end 32 of the operating lever 30, with the elongated direction being the front-rear direction. 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. An intermediate portion of the needle shaft portion 36 projects slightly rearward to form a protruding portion 38.

The needle tip portion 37 is formed in a concave shape having both walls, and the width of the opening of both walls is equal to the width of the operated end 5 of the claw member 50.
It is slightly wider than 1. Further, the wall portions on the tip side of both walls are hook portions 37a that engage and detach from the operated end 51 of the claw member 50, and the wall portions 37 on the proximal side of both walls
C or push part.

A locking protrusion 25 for locking a hook portion 37a of a needle tip portion 37 of a release link 35 is formed on the ratchet plate 20a so as to continue from the lower teeth thereof.

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 37b 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 distal end 32 of the operating lever 30 is formed into a cylindrical shape, and a release rod 60 is inserted into the distal end 32 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 rod 60. Further, the push portion 37c of the release link 35 elastically pushes the operated end 51 of the pawl member 50 by the spring member 65, thereby urging the pawl member 50 in the direction of meshing with the ratchet plate 20a. ing.

Next, the action will be explained.

In FIG. 3, when the operating lever 30 is in the collapsed position, the pin member 42a fixed to the support plate 4o is in contact with the upper part of the base member 2o, and the support plate 4o is restrained in the depressed position. There is. The pawl member 5o meshes with the lower teeth of the ratchet plate 20a.

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
It is engaged with the operated end 51 of 0.

Further, the pin member 34 implanted in the upper end of the release link 35 is located at the front end of the elongated hole 33, and the needle shaft portion 3
6 is pulled forward through the release rod 60 by a spring member 65. As a result, the push portion 37c of the needle tip portion 37 of the release link 35 elastically pushes the operated end 51 of the claw member 5o.

When the operating lever 30 is swung to the upright position, the operating lever 3
0 pulls up the support plate 40 via the pin member 42a. At this time, the operated end 51 of the claw member 50 pushes in the push portion 37c of the needle tip portion 37 of the release link 35 against the elastic force, and the release link 35 swings to release the claw member 50. It meshes with the teeth of the ratchet plate 20a one after another.

When the claw member 50 meshes with the teeth of the ratchet plate 20a one after another, it eventually meshes with the upper teeth as shown in FIG.

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

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 operation lever 30 is brought down by itself, and the storage position is more laid down than the resting position shown in FIG.
As shown in FIG. 2, the ratchet plate 20a is restrained in the retracted position by the lever 30 or the lever 25 for locking the ratchet plate 20a.

In FIG. 2, when the release button 65 is pushed in, the hook 37a of the needle tip 37 of the release link 35 is disengaged from the locking protrusion 25 of the ratchet plate 20a, and the operating lever 30 can be pulled up.

When the operating lever 30 is pulled up, the release link 3
The protruding portion 38 of the needle shaft portion 36 of No. 5 climbs onto the operated end 51 of the claw member 50, and eventually, as shown in FIG. do.

In FIG. 4, 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. 4, the pin member 34 or the long hole 33 is moved from the front end to the rear end, and the release link 35 or the pin member 3 in FIG.
Swing clockwise around 9.

As a result, the hook portion 37a of the release link 35 is engaged with the operated end 51 of the pawl member 50, and the pawl member 50 swings clockwise in FIG.
Release the mesh from a. 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.

In the embodiment, the needle tip portion 3 of the release link 35
7 is shown as one that engages the operated end 51 of the claw member 50 from diagonally below, but the operation lever 30 is not limited to this.
When standing up, engages with the operated end 51 of the claw member 50,
Any shape may be used as long as it can be removed from the operated end 51 of the claw member 50 when the operating lever 30 is lowered.

"Effects of the Invention" According to the parking brake device according to the present invention, the operating member is provided on the operating lever side, which engages and disengages from the operated end of the pawl member when the operating lever swings between the upright position and the collapsed position. established,
Since the operated end of the pawl member is not located in an upwardly protruding obstructive position, safety can be improved by preventing the pawl member from coming off the ratchet plate due to inadvertent pushing of the operated end. In addition, in consideration of safety, it is not necessary to cover the operated end of the claw member with a cover member, and the entire device can be made smaller.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a perspective view of a parking brake device, and FIGS. 2 to 4 are explanatory diagrams of its operation. 10... Vehicle body 20... Base member 20a... Ratchet plate 30... Operating lever 31... Base 35... Release link (operating member) 36... Needle shaft portion 37... Needle Tip portion 37a... Hook portion 37c... Push portion 40... Support plate 43... Clevis 50... Claw member 51... Operated end 60... Release rod

Claims (1)

[Scope of Claims] A parking brake device in which a base part of an operating lever is swingably supported on a base member fixed to a vehicle body side, and braking is performed by raising the operating lever from a collapsed position to an upright position, A ratchet plate is fixed to the base member, and a support plate is pivotally supported on the base member so as to be swingable with the base concentrically therewith, and swings together with the operating lever when the operating lever is raised; A brake cable is connected to the support plate, and a pawl member that engages with the ratchet plate is attached to the support plate, an operated end is protruded from the pawl member, and the pawl member is disengaged from the operating lever. An operating member to be operated is mounted, and the operating member is provided with a push portion elastically abutting against the operated end of the claw member in order to urge the claw member in a direction to engage the ratchet plate, and the claw member. The operated end of the claw member engages with the operated end of the claw member in order to disengage the members by moving the members in the opposite direction to the engaging direction, and the operated end of the claw member is moved so that the operating lever falls down independently. A parking brake device characterized by forming a hook portion that can be removed from the parking brake device.