JPH0331045A - Parking brake device - Google Patents

Abstract

PURPOSE:To surely prevent an unprepared sudden start of a vehicle, at the time of releasing a parking brake, by providing constitution in such a way as restricting a stop release of brake operation in a parking brake device in the case of a main brake device performing no braking action. CONSTITUTION:When a pedal 3a is stepped in, a foot lever 3 is turned in the clockwise direction with a pivotally supporting shaft 11 serving as the center, and a parking brake device 1 is actuated. Here a tooth part 3b of the foot lever 3 is stopped to a pawl part 4b in a ratchet lever 4, and the foot lever 3 is held to a step-in position even when a foot is detached. While when a release knob 7 is pulled while stepping-in a foot brake not shown, stopping of a release lever 5 is released by retracting an output shaft 20a of an actuator 20, while the release lever 5 is turned in the clockwise direction with a pivotally shaft 13 serving as the center by pulling a wire 6a in a release cable 6. As a result, stopping of the tooth part 3b by the pawl part 4b is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a parking brake device for a vehicle such as an automobile.

[Prior Art] As is well known, in vehicles such as automobiles, in addition to the main brake (foot brake) that decelerates and stops the vehicle while driving, there is also a main brake (foot brake) that decelerates and stops the vehicle while the vehicle is in a temporary or long-term parked state. For example, Japanese Utility Model Application Publication No. 60-95361 discloses a parking brake device equipped with a foot-operated operating lever.

By the way, when starting a vehicle with the parking brake in place, the transmission lever, which is in the neutral position, is normally first operated to the low gear position, and then the parking brake is released.

At this time, some drivers may release the parking brake while already putting their foot on the accelerator pedal. Further, in an AT vehicle equipped with an automatic transmission, the parking brake is normally released after the transmission lever, which is in the parking position or the neutral position, is operated to a drive range. In this case, when the parking brake is released, the vehicle will gradually move forward even without depressing the accelerator pedal.

[Problem to be Solved by the Invention] However, if a problem occurs in the engine system and the engine is in a high rotation state, if the parking brake is released using the procedure described above, the vehicle may suddenly start when the parking brake is released. is possible.

In particular, in the case of the above-mentioned foot lever type parking brake device, while the brake operation is performed with the foot lever,
The release operation is performed using the release knob at the driver's hand.
Further, the release knob is released all at once by pulling the release knob. For this reason, it is not possible to gradually release the parking brake like with a normal side lever type parking brake, and since the brake operation and release operation must be performed in separate systems, sudden starts may occur while the brake is being released. When an emergency situation occurs, it is difficult to immediately take measures such as reactivating the parking brake.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a parking brake device that can reliably prevent a sudden start of a vehicle when the parking brake is released.

[Means for Solving the Problems] Therefore, the present invention provides an operating means for operating a parking brake device, and an engaging tooth provided on the operating means to bring the operating means into a brake operating position. In a parking brake device comprising a locking member that locks and a lock release means that releases the lock, the lock release means is released only when a main brake device is operating the brake. A release restricting means is provided which prohibits the releasing operation of the lock releasing means when the main brake device is inactive.

[Effect of the invention] According to this invention, since the above-mentioned release restriction means is installed,
The parking brake is no longer released when the main brake device is in an inoperative state.

In other words, the main brake is always applied when the parking brake is released, which reliably prevents the vehicle from suddenly starting when the parking brake is released due to problems with the engine system, thereby ensuring safety in vehicle operation. can improve sex.

[Example 7] Hereinafter, an example of the present invention applied to a foot-operated parking brake device will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the parking brake device l according to the present embodiment includes a mounting bracket 8 and a plurality of bolt members 9.
A case 2 is fastened and fixed to the vehicle body via a foot pedal 3a, a foot lever 3 is provided with a foot pedal 3a at the lower end and is supported by the base of the upper side of the case 2, and the outer circumference of the upper side of the foot lever 3 is A ratchet lever 4 that has a ratchet pawl portion 4b that engages with a ratchet tooth portion 3b formed in a portion, and that locks the foot lever 3 in its depressed position.
, a release lever 5 for releasing the lock of the ratchet lever 4, and a release cable 6 attached to one end of the release lever 5 to release the release lever 5.
It is equipped with a release knob 7 to avoid release operation.

Although not specifically shown, the foot lever 3
A callan lever that winds up the inch brake cable in conjunction with the depressing operation of the foot lever 3 is attached to the upper side opposite to the ratchet teeth, and the parking brake is applied by winding up the inner brake cable. .

The foot lever 3, ratchet lever 4 and release lever 5 are rotatably supported on the case 2 side via pivot shafts 11, 12 and 13, respectively, and are supported on the return side by return springs 14, 15 and 16, respectively. is energized by That is, the foot lever 3 and the release lever 5 are biased in the counterclockwise direction in FIG. 1 around the pivot shafts 11 and [3, respectively.
The ratchet lever 4 is biased clockwise around the pivot shaft 12, and in the normal state when the foot lever 3 is not depressed (see the solid line in FIG. 1), the ratchet pawl 4b of the ratchet lever 4 is , is in contact with a curved portion of the outer periphery of the foot lever 3 located below the ratchet tooth portion 3b.

In this embodiment, for example, an electromagnetic solenoid is installed on the side of the pivot shaft 13 of the release lever 5 in order to restrict the rotation of the release lever 5 in the release direction (clockwise direction in FIG. 1). An actuator 20 is provided.

As shown in FIG. 2, the main body 2 of the actuator 20
0b is fixed to the side walls 2a, 2a of the case 2 so that the output shaft 20a protrudes toward the release lever 5 side. Further, the actuator 20 is electrically connected to a normal foot brake (not shown) that decelerates or temporarily stops the vehicle, and is turned ON when the foot brake (not shown) is depressed. Above output shaft 20
Pull a toward the main body 2Ob side (see broken line arrow in Figure 2)
, when the foot brake (not shown) is not depressed, it is set to turn off and cause the output shaft 20a to project toward the release lever 5 (see the solid line arrow in FIG. 2).

That is, when the foot brake (not shown) is depressed and the main brake is applied, the release lever 5 can be rotated in the release direction, but the foot brake (not shown) is not depressed and the main brake is applied. In a normal state where the main brake is not activated, the release lever 5 is locked by the output shaft 20a and is prevented from rotating in the release direction.

In the above configuration, when the pedal 3a of the foot lever 3 is depressed (see the two-dot chain line in FIG. 1), the foot lever 3 is rotated clockwise around the pivot shaft 11, and this rotation In conjunction with the operation, the inch brake cable (not shown) is wound up by the counter lever (not shown) as described above, and the parking brake is applied. In addition, at this time, the ratchet tooth portion 3b of the foot lever 3
is locked by the claw portion 4b of the ratchet lever 4. Since the ratchet lever 3 is biased clockwise around the pivot shaft 12 by the return spring 15 (in other words, in the direction in which it is pressed toward the ratchet teeth 3b), even if you release your foot, the foot lever will not move. 3 will be held at the depressed position.

To release the above-mentioned brake state of the parking brake device 1, the foot brake (not shown) is depressed and the release knob 7 disposed near the driver's hand is pressed.
Just pull and operate. That is, when the foot brake (not shown) is depressed, the output shaft 20a of the actuator 20 is pulled toward the main body 2Qb, and the release lever 5
is released, the wire 6a in the release cable 6 is pulled by pulling the release knob 7, and the release lever 5 is rotated clockwise about the pivot shaft 13. As a result, the upper end 4a of the ratchet lever 4 is pressed by the hook portion 5a of the release lever 5, and the ratchet lever 4 is rotated counterclockwise, causing the ratchet claw portion 4b to lock the ratchet tooth portion 3b. The condition is now cleared.

Note that even if the release knob 7 is pulled without depressing the foot brake (not shown), the release lever 5 is locked by the output shaft 20a of the actuator 20 and cannot be rotated in the release direction. The tooth portion 3b is maintained in a locked state by the ratchet pawl portion 4b, and the parking brake state is not released.

As described above, according to the present embodiment, when the foot brake (not shown) is not depressed on the side of the pivot shaft 13 of the release lever 5 that releases the lock of the ratchet lever 4, the release is released. Since the actuator 20 is provided to prevent the lever 5 from rotating in the release direction, the parking brake will not be released when the main brake is not applied. In other words, the main brake is always applied when the parking brake is released, which reliably prevents the vehicle from suddenly starting when the parking brake is released due to problems with the engine system, etc., and ensures the safety of the vehicle's launch. It is possible to improve one's sexuality.

In particular, in the case of an AT vehicle, in which the vehicle can move forward without depressing the accelerator pedal by simply switching the transmission lever to the drive range when the vehicle starts, the parking brake device l according to this embodiment is , which is more effective in increasing vehicle operation safety.

Although the above embodiment was applied to a foot-operated parking brake device, the present invention is applicable not only to the above case but also to other types of parking brake devices such as a lever type. can be applied.

[Brief explanation of drawings]

FIG. 1 is an explanatory front view of a parking brake device according to an embodiment of the present invention, and FIG. 2 is an explanatory cross-sectional view taken along the line AA in FIG. 1. DESCRIPTION OF SYMBOLS 1... Parking brake device, 3... Foot lever, 3b... Ratchet teeth, 4... Ratchet lever, 4b... Ratchet pawl, 5... Release lever 6... Release Cable, 7...Release knob, 2
0...actuator, 20a...actuator output shaft.

Claims (1)

[Claims] (1) An operating means for operating the parking brake device, a locking member that engages with engagement teeth provided on the operating means to lock the operating means at the brake operation position, and a locking member for locking the operating means at the brake operation position. In a parking brake device equipped with a lock release means for releasing the lock, the lock release means can be released only when the main brake device is operating the brake, and when the main brake device is not operating. A parking brake device characterized in that the parking brake device is provided with a release restriction means for prohibiting the release operation of the lock release means.