JPH0657500B2 - Automatic transmission shift lock device - Google Patents

Abstract

PURPOSE:To prevent a sudden start of a vehicle by releasing shift lock at parking and neutral positions by stepping a brake pedal to enable select operation to a running position. CONSTITUTION:When a key 14 is not inserted, a selector lever 3 is placed at a position P, and a shift lock plate 8 is engaged with a pin 9 to lock movement of a shift rod 4. At this time, a key lock control plate 17 enables the key 14 to be mounted and demounted at a position for engaging with a pin 18. Secondly, when the key 14 is turned to ON position, a solenoid 12 retains the lock plate 8 at a lock position, and a key lock member 22 causes the plate 17 to further move to a non-lock position. Hereupon, when a brake pedal 15 is stepped, the solenoid 12 allows the plate 8 to move to the non-lock position, so that the shift rod 4 can be moved to a desired range position. Thus, sudden start and robbery can be prevented.

Description

The present invention relates to a shift lock device for an automatic transmission of a vehicle, and more specifically, a selector lever placed in a specific gear range. A shift lock function that prevents movement to other ranges and a key interlock function that allows the ignition key to be removed and attached only when the selector lever is placed in the parking position. Regarding locking device.

(Prior Art) A general vehicle equipped with an automatic transmission (hereinafter referred to as "A / T vehicle")
The selector lever (referred to as ") has a parking position" P "that mechanically locks the fluid clutch during parking, a reverse position" R "that sets the back gear range, and a neutral position that completely disconnects the transmission. "N", drive position "D" for normal full automatic shifting, second position "2" to limit the shift range to the second gear only or between low gear and second gear, shift range to low It is selectively placed in the low position "L" which limits to gear only.
And in order to prevent runaway of A / T car immediately after starting,
The engine is adapted to be started via an engine starting safety circuit which allows starting only in the parking position or the neutral position.

Also, when the gear enters the driving range with the engine running at high speed, the selector lever is moved from the parking position to another position, for example, the drive position, in order to prevent the vehicle from running out of control. In this case, there has been proposed a parking shift lock mechanism configured so that the selector lever cannot be operated unless the brake pedal is depressed. In such a parking shift lock device, when the lock member of the selector lever (shift rod) and the brake pedal are connected by a connecting means such as a cable and the brake pedal is depressed, the lock member is released. It is configured to retract to the unlocked position.

Further, normally, the ignition key can be attached and detached at the lock position of the key cylinder even when the gear position, that is, the selector lever is not only at the parking position but also at other range positions. Therefore, in order to prevent the vehicle from being stolen, there has been proposed a so-called key interlock mechanism that enables the ignition key to be attached and detached only when the selector lever is in the parking position, that is, when the gear is in the parking range. .

(Problems to be Solved by the Invention) In order to release the locking action of the parking shift lock mechanism, the brake pedal must be depressed. In the case of the parking shift lock device in which the brake pedal and the lock member are mechanically connected, the brake pedal, which is relatively frequently operated and swings during traveling, also swings the lock member. There is a problem that it becomes a load. When the brake pedal is depressed, the lock member is retracted to the unlocked position.In other words, when the brake pedal is not depressed, the lock member is located at the lock position, so that the shift lock is performed during traveling. Therefore, some means for avoiding this is required. The selector lever may be temporarily placed in the neutral position when warming up or waiting for a signal while driving. Then, when starting, the selector lever is moved to the traveling position.At this time, the engine rotation is abnormally high due to the activation of the idle up mechanism or excessive depression of the accelerator pedal. And this also causes a sudden start and a misoperation such as the depression of the brake pedal and the accelerator pedal.

Also, the conventional key interlock mechanism is
Although it requires the lever to be placed in the parking position, it does not have a function to lock the lever, so it is possible to expect an effect in preventing runaway of the vehicle by inadvertent gear select operation. There is a problem that there is not.

(Means for Solving the Problem) The present invention provides a mechanism and a key interlock mechanism that do not impose a load on the brake pedal and that reliably ensures shift lock at the parking position and the neutral position. In providing a shift lock device for an A / T vehicle in which gears are interlocked with each other, a detent pin provided on a shift rod is engaged with a desired position of a detent plate by selecting a position of a selector lever. In automatic transmissions that specify the gear range of the transmission, when the shift lock pin fixed to the shift rod and the detent pin are in the parking position or the neutral position, the shift lock・ It has an engaging part that engages with the pin and regulates the movement of the shift rod in the axial and rotational directions. The rod position where the engaging part of the shift lock pin engages with the shift lock pin and the engaging part is disengaged from the shift lock pin,
A shift lock provided so as to be movable between an unlocked position that does not impede the movement of the rod in the axial direction and the rotation direction and that does not move in the axial direction of the shift rod.
A plate and a first biasing means for giving the shift lock plate a movement habit toward an unlocked position;
A key lock control pin secured to the shift rod and a notch that selectively engages the key lock control pin, the notch when the shift rod is in the parking position. Lock position where the key engages the key lock control pin and when the shift rod is placed in a position other than the parking position, the key lock control pin is in the non-locking position opposite the notch The key lock control plate, which is swingable between the position and the key lock control plate, is connected to the key lock control plate, and is attached to the ignition key part. Between the key lock position and the non-key lock position that prevents the key from rotating to this lock position. A key interlock mechanism that includes a movable key lock member, a second biasing means that provides a movement habit in a direction to position the key lock control plate in an unlocked position, and an ignition key in an on position. Third biasing means for holding the shift lock plate in the locked position when placed and allowing the shift lock plate to move from the locked position to the unlocked position in response to a signal on the brake pedal being depressed. It is characterized by that.

(Operation) With the ignition key removed, the selector lever is placed in the parking position, and the shift lock plate engages its engaging portion with the shift lock pin to allow the shift rod to move. It is placed in a locked position that restricts axial and rotational movement. At this time, the key lock control plate is placed in the lock position where the notch engages with the key lock control pin, and the key lock member is moved to the lock position to attach and detach the ignition key. Is possible.

When the ignition key is turned to the engine-on position, the third biasing means holds the shift lock plate in the lock position, and the key interlock mechanism including the key lock member moves to the non-key lock position. Move to and move the key lock control plate to the unlocked position.

Brake when the selector lever movement is restricted.
When the pedal is depressed, the signal causes the third biasing means to allow the selector control plate to move to the unlocked position so that the shift rod can be moved to the desired range position. When the shift rod is in a position other than the parking position, the shift lock plate will
First in unlocked position disengaged with lock pin
It is held by the biasing means.

(Embodiment) Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

In FIG. 1, on a steering column 2 that rotatably supports a steering shaft 1, a shift rod 4 to which a selector lever 3 is fixed is attached.
Is attached so as to be freely movable and rotatable in the Y direction. The shift rod 4 selects a traveling condition by operating the selector lever 3. The selected range is
You need to keep this. At a proper position of the steering column 2, a base end portion 5a of a detent plate 5 having a plurality of range positions is fixed. Of the range positions, only the parking position P is formed at a position independent of the other positions, and includes a reverse position R and a recess 5c formed with the projection 5b as a boundary. A neutral position N is formed next to the reverse position R, and the position N and the parking position P are substantially the same height in the axial direction X of the shift rod 4 as shown in FIG. However, only the reverse position R is formed at a position higher than both positions.

A detent pin 6 is fixedly mounted on the shift rod 4 and selectively engages one of the range positions of the detent plate 5 for holding the lock in the selected range. The shift rod 4 in which the detent pin 6 is engaged with the parking position P cannot be rotated in the Y direction to another range position only after being moved in the axial direction X. Neutral position N
To move the detent pin 6 placed in the reverse position R to the reverse position R, the shift rod 4 is moved in the X direction and then rotated in the Y direction.

A support shaft 7 is arranged along the steering column 2. This support shaft 7 is used for the steering column 2
It is supported by a bracket (not shown) fixed to. The support shaft 7 supports a base end portion 8b of the shift lock plate 8 having an engaging portion 8a. The shift lock plate 8 is made of a highly rigid member, and is also rotatable with respect to the highly rigid support shaft 7 and is supported so as not to move in the axial direction. The tip 8c of the shift lock plate extends downward along the shift rod. FIG. 1 shows a state in which the detent pin 6 is engaged with the parking position P. The shift rod 4 in this position is engaged with the engaging portion 8a of the shift lock plate 8. The shift lock pin 9 to be removed is fixedly planted. As shown in FIGS. 2 and 6, the shift lock plate 8 engages its engaging portion 8a with the shift lock pin 9 to prevent the shift rod 4 from moving in the axial direction X. As shown in FIG. 3, it swings between a locked position and a non-locked position that does not prevent the shift rod 4 from moving in the axial direction X by retracting from the movement locus of the shift lock pin 9. It is provided freely. The engagement portion 8a of the shift lock plate 8 has the detent pin 6
Is located at the neutral position N (see reference numeral 6N in FIG. 6), shifts to one of the ends.
Engage lock pin 9 (reference numeral 9 in FIGS. 2 and 6)
N), the detent pin 6 is located at the parking position P. (See reference numeral 6P in FIG. 6) At this time, the shift lock pin 9 is engaged with the other end (see reference numeral 9P in FIG. 6), and a position other than these positions, for example, reference numeral 6P in FIG. As shown by 6R, when the detent pin 6 is located at the reverse position R, the shift lock pin 9 is placed at the position where it is disengaged from the engaging portion 8a as indicated by 9R. Get burned.

Shift lock plate 8 and steering column 2
A tight return spring 11 as a first urging means is stretched between the bracket 10 and the bracket 10. With this return spring 11, the shift
The locking plate 8 is given the habit of moving toward the unlocked position (FIG. 3).

A solenoid 12 serving as a third biasing means is fixed to the steering column 2 so as to face the shift lock plate 8. The movable pin 12a of this solenoid is made to project when the ignition key 14 of the ignition key unit 13 is placed in the ON position ON and the start position START, and shifts against the elasticity of the return spring 11. Lock plate 8 in locked position (see Figure 2)
Push to. The solenoid 12 is turned on by the signal of the brake pedal switch 16 which is activated when the brake pedal 15 of the service brake is depressed, and when the pedal 15 is depressed, its pin 12a is retracted to shift lock. -The plate 8 is allowed to move to the unlocked position (see Fig. 3). The solenoid 12 is connected to the brake pedal switch 16 via a control circuit 23 having a timer. Control circuit 23
A position sensor 24 for detecting the position where the selector lever 3 is placed is connected to. Then, in the control circuit 23, the ignition key unit 13 is set to NO.
When the neutral position or the parking position is selected, the specified time (sec)
When the time elapses, the solenoid 12 is turned on and its pin 12a is projected, and when the brake pedal is depressed and the signal is input via the switch 16, the solenoid is immediately turned off and a signal for retracting the pin is output. It is like this. As the third urging means, instead of the solenoid 12, a combination of a motor or solenoid and a cam or lever driven by the motor or solenoid may be used.

A base end of a key lock control plate 17 is supported on the support shaft 7 so as to be spaced apart from the shift lock lever 8 so as to be rotatable and not to move in the axial direction.
The key lock control plate 17 has a notch
17a is formed. Key lock control
The tip 17b of the plate 17 extends to a position where it can be engaged with the tip 8c of the shift lock plate 8. On the shift rod 4, a key lock control pin 18 which is engaged with and disengaged from the notch 17a of the key lock control plate 17 is fixed. As shown in FIGS. 1 and 4, when the shift rod 4 is placed in the parking position P, the key lock control
The pin 18 is positioned so that it can be engaged with the notch 17a, and the key lock control plate 17 can be positioned at the lock position. When the shift rod 4 is placed in a position other than the parking position, the key lock control pin 18 has a notch 17 as shown in FIG.
The plate 17 is positioned at the unlocked position by engaging with a portion other than a. The key lock control plate 17 has one end of a spring 19 as a third urging means for giving a swinging habit to the plate in the unlocked position.
19a is locked. The spring 19 is wound around the support shaft 7 and has the other end at the shift lock plate 8
The plate 17 as the second biasing means.
The configuration is not limited to that shown in the figure as long as the configuration provides the above-mentioned swinging habit.

One end 20a of the control cable 20 is connected to the tip 17b of the key lock control plate 17. The ignition key unit 13 is provided with a lever 21 of a key interlock mechanism that rotates with the rotation of the ignition key 14. A key lock member 22 is connected to the other end 20b of the control cable 20, and the elastic force of the spring 19 moves the key lock member 22 from the key lock position shown by the solid line to the unlocked position shown by the chain line. Mobility habits are given. The key lock member 22, as shown by the solid line in FIG. 1, allows the key interlock lever 21 to rotate to the lock position LOCK and allows the ignition key 14 to be attached and detached.
It is movably provided between a lock position and a non-key lock position that does not allow the key interlock lever 21 to rotate to the lock position LOCK as shown by a chain line, for example. The key lock member 22 is located in the key lock position when the key lock control plate 17 is in the lock position (see FIG. 4), and the key lock control plate 17 is in the unlocked position. (Fifth
Located in the non-key lock position when placed in (see illustration). When the key lock member 22 is placed in the non-key lock position indicated by the chain line, the key interlock lever 21 is prevented from moving by the key lock member 22, so that the ignition key 14 is The locked position
The key cannot be attached or removed because it cannot be turned to LOCK. The key lock control plate 17 is in the locked position when the shift rod 4 is in the parking position.
Since the ignition key 14 is only in the position, the key lock member 22 is in the lock position LOCK.
The key can only be removed when The key interlock lever 21 can be swung only by turning the ignition key 14, and when it is placed in the key lock position,
The elastic force of the return spring 11 transmitted via the control cable 20 and the key lock control plate 17 prevents the return spring 11 from rotating.

The operation of the embodiment configured as described above will be described separately for the parking position P and the neutral position N with reference to FIG.

"Parking Position P" In this range position, as shown in FIG. 1, the detent pin 6 of the shift rod 4 is located in the recess 5c of the parking position P of the detent plate 5. . At this time, the key interlock lever 21 is placed in the solid line position, and by positioning the key lock member 22 in the solid line position, the key lock control plate 17 is locked via the control cable 20. Hold in position. Therefore, the shift lock plate 8 is located at the lock position where the engagement portion 8a is engaged with the shift lock pin 9. Therefore, with the ignition key 14 still inserted in the lock position LOCK of the key cylinder, the ignition key can be removed and replaced, but the shift key
Since the lock plate 8 is in the lock position,
The operation of the selector lever 3 is “impossible”. Pin 12 of solenoid 12 with or without the brake pedal
a remains withdrawn. Therefore, the ignition
When the key portion is placed in the LOCK position, the selector lever 2 cannot be operated, and the vehicle keeps its gear mechanically locked.

When the ignition key 14 is rotated to the ACC position, it only disables the attachment / detachment of the key.
The operation of the lever 3 is also kept in the “disabled” state.

Next, the ignition key 14 is rotated from the engine off state to the ON position and the START position. In this case, whether or not the selector lever can be operated depends on whether or not the brake pedal is depressed. Further, the operation when the ignition key is placed in the engine ON position where the engine is turned on is also the same, and therefore will be described collectively.

When the ignition key 14 is rotated to the ON position, the key interlock lever 21 moves to the chain line position as shown in FIG. 1, and the key lock urged by the spring 19 accordingly. The member 22 also moves to the chain line position.
At this time, the key lock control plate 17
Swings to the unlocked position shown in FIG.
The engagement between a and the key lock control pin 18 is released. When the key lock control plate 17 moves to the unlocked position, the shift lock plate 8 biased by the return spring 11 also tries to swing to the unlocked position shown in FIG. When the key is placed in the ON position, the control circuit 23 outputs a signal to cause the pin 12a of the solenoid 12 to project because the selector lever 3 is placed in the parking position, as shown in FIG. Thus holding the shift lock plate 8 in the locked position.

In this state, if the brake pedal 11 is not depressed and the brake pedal switch is OFF, the pin 12a of the solenoid is kept protruding, so the shift
The lock plate 8 is held in the locked position shown in FIG. That is, the shift lock plate 8 has the first
As shown in FIGS. 2 and 3, the engagement of FIG.
It is engaged with the lock pin 9 to prevent the shift rod 4 from moving in the axial direction X. Therefore, the brake
When the pedal 15 is not depressed, the shift lock plate 8 is in the lock position for restricting the movement of the lock pin 9 in the X direction and the detent pin 6 is in the locked position.
Is placed in the parking position P to regulate the rotation of the shift rod 4 in the Y direction, the detent pin 6 of the shift rod 4 is operated from the parking position P by operating the selector lever 3. It cannot be moved to another range position.

When the brake pedal 15 is depressed and the brake pedal switch is turned on, the control circuit 23 outputs a signal and the pin 12a of the solenoid 12 is retracted as shown in FIG. 3, so that the shift lock plate 8 Is the return
It is moved to the unlocked position by the elastic force of the spring 11, and the engagement between the engagement portion 8a and the shift lock pin 9 is released. Therefore, when operating the selector lever 3,
The movement of the shift rod 4 in the axial direction X and the rotation in the Y direction are “OK”. When the selector lever 3 is moved to the driving range, the vehicle will start. At this time, even if the engine is in a high rotation state and the vehicle tries to start suddenly, the driver who puts his / her foot on the brake pedal 15 can immediately depress the pedal to apply the braking.

When the ignition key 14 is in the engine ON position and the selector lever 3 is moved to a range position other than the parking position P, the key lock
The control pin 18, as shown in FIG.
The lock control plate 17 is rotated to a position where it is disengaged from the notch 17a. Therefore, even if the ignition key 14 is rotated to the LOCK position where the engine is turned off in the range other than the parking position, the key lock control plate 17 connected to the key lock member 22 is Key lock control pin 1 except the cutout 17a
Key interlock lever 21 for abutting 8
Since the key cannot be rotated, the key cannot be rotated to the LOCK position. Further, since the position sensor 24 detects a range other than the parking position, the solenoid 12 keeps its pin 12a retracted.

"Neutral position N" This position may be selected during warm-up operation or while waiting for a signal while traveling. In this neutral range, the detent pin 6 of the shift rod 4 has a detent pin 6 as shown by 6N in FIGS. 1 and 6.
The plate 5 is in the neutral position N. Detent pin 6 is neutral
Position sensor indicates that it is in position N
When the signal is detected by 24, the control circuit 23, to which the signal is input, outputs a signal for turning on the solenoid 12 after a lapse of a predetermined time, and causes the pin 12a to project as shown in FIG. Therefore, the shift lock plate 8 is pushed to the lock position. At this time, the shift lock pin 9 is
As shown by reference numeral 9N in the drawings, FIG. 2 and FIG. 6, it engages with one end of the engaging portion 8a. When the brake pedal switch is OFF without the brake pedal 15 being depressed, the pin 12a of the solenoid remains protruding, so that the shift lock plate 8 is held at the lock position (see FIG. 2). . The key lock control pin 18 is in a position where it does not engage the notch 17a in the key lock control plate, as shown in FIG.
As shown in FIGS. 1 and 2, the shift rod 4 cannot move in the axial direction X when the shift lock plate 8 is located at the lock position and restricts the movement of the lock pin 9N. Then, regarding the movement of the shift rod 4 in the Y direction, when the detent pin 6N is moved to the drive position D, the side edge 8d (see FIG. 6) of the engaging portion prevents this. However, the step 5d of the detent plate 5 is moved to the reverse position R.
(See FIG. 6) prevents the selector lever 3 from being operated, and the select operation to the running range cannot be performed. Next, when the brake pedal 15 is depressed to turn on the brake pedal switch 16, as shown in FIG. 3, the pin 12a of the solenoid 12 retracts, so that the return spring 11 causes the shift lock plate 8 to move. To the unlocked position. When the shift lock plate 8 retracts to the unlocked position, the movement of the selector lever 3 and the shift rod 4 in the X direction and the rotation in the Y direction become “what”, and the operation of the selector lever becomes “what”.
Then, the driving range can be selected. That is,
Brake when starting from the neutral range
The selector lever cannot be selected unless the pedal is depressed, so braking is immediately applied even if the gear enters when the engine is rotating at high speed due to the operation of the yield up mechanism or excessive depression of the accelerator pedal. You can prevent sudden starts.

Ignition at neutral position N
When the key 14 is rotated to the ACC position, the engine will be stopped. In this case, the key lock control plate 17 and the shift lock plate 8 are placed in the locked position, but the key interlock lever 21 is
Since the ignition key 14 is not placed in the key lock position indicated by the solid line in the figure, the ignition key 14 cannot be attached or detached. Also,
At this time, even if you press the brake pedal,
Since the ignition key is not in the ON position, the solenoid pin remains retracted.

Ignition key 14 from ACC position to engine ON, STAR
The action when the key is turned to the T position is the same as when the key is placed in the engine ON position, so the explanation is omitted.

"Running Range Position" For example, if the detent pin 6 is placed in the reverse position R as indicated by reference numeral 6R in FIGS. 1 and 6, then the shift lock plate 8
Is in an unlocked position, the shift lock pin 9 is in a position where it is prevented from engaging with the engaging portion 8a, and the solenoid 12 is turned on, as indicated by reference numeral 9R in FIG. However, the plate 8 is not placed in the lock position.

To remove the ignition key 14, the selector lever 3 should be placed in the parking position P. That is, as shown in FIG. 1, when the ignition key 14 is rotated to the LOCK position after the detent pin 6 is placed in the parking position P, the key interlock lever 21 shows the key indicated by the solid line. It rotates to the lock position and moves the key lock member 22 engaged therewith to the solid line position. The movement of the key lock member 22 causes the key lock control plate 17 to swing to the lock position via the control cable 20. As the plate 17 swings, the shift lock plate 8 is swung to the lock position against the elasticity of the return spring 11, and the shift rod 4 moves in the axial direction X and the rotational direction Y. Regulate. Key interlock lever 21
When the ignition key 14 is rotated to the LOCK position, the ignition key 14 can be removed from the key cylinder, interlocked, and at the same time, the parking shift lock for restricting the operation of the selector lever was made. become.

(Effects of the Invention) As described above, according to the shift lock device for an A / T vehicle of the present invention, the parking position and the neutral position
The transmission is shift-locked in the position,
If the brake pedal is not depressed, the lock is released and the select operation to the traveling position cannot be performed, so sudden start of the vehicle can be prevented. Also, since the ignition key can be attached and detached only when the gear is in the parking range, the vehicle after removing the key has its transmission mechanically locked.
In addition to the sudden start prevention described above, it has a great effect on theft prevention.

[Brief description of drawings]

FIG. 1 is a perspective view of a shift lock device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a shift lock device in a parking position or a neutral position.
FIG. 3 is a plan view of an essential part of the same showing a state where the lock plate is placed in the lock position. FIG. 3 shows that the shift rod is in a position other than the parking position and the neutral position and the shift lock plate is unlocked. Fig. 2 is a working diagram showing the state of being placed in the position
A plan view showing a state where the rod is placed in the parking position and the key lock control plate is placed in the lock position. Fig. 5 shows the shift rod placed in a position other than the parking position and the key lock control plate.・ A plan view showing a state in which the control plate is placed in the unlocked position, and Fig. 6 is a view for explaining the relative position of the shift lock pin and the shift lock plate, which corresponds to the position of the detent pin. FIG. 7 is a partially developed view, and FIG. 7 is a diagram showing an operational relationship of each member in the parking position and the neutral position. 3 ... Selector lever, 4 ... Shift rod, 5 ...
… Detent plate, 6… Detent pin, 8
...... Shift lock plate, 9 ...... Shift lock pin, 11 ...... Return spring as first urging means, 12 ...... Solenoid as third urging means, 13 ......
Ignition key part, 14 ... Ignition key, 15 ... Brake pedal, 17 ... Key lock control plate, 18 ... Key lock control pin, 19 ... As second urging means Spring,
21 …… Key interlock lever, 22 …… Key lock member.

Claims (1)

[Claims] 1. An automatic transmission in which a detent pin provided on a shift rod is engaged with a desired position of a detent plate by selecting a position of a selector lever to specify a gear range of the transmission. , The shift lock pin fixed to the shift rod that is axially movable and rotatable with the gear range select operation of the selector lever, and the detent pin are set to the parking position or the neutral position. When in the position, it has an engaging portion that engages with the shift lock pin and restricts movement of the shift rod in the axial direction and the rotational direction, and the engaging portion has the engaging portion. And the lock position where the shift lock pin engages with the shift lock pin is disengaged from the lock position. A shift lock plate that is movable between an unlocked position that does not hinder the movement in the rotational direction and that does not move in the axial direction of the shift rod; The first urging means for imparting a habit of moving toward the unlocked position, a key lock control pin fixed to the shift rod, and a disconnection for selectively engaging the key lock control pin. It has a cutout, and the shift rod has a parking
The lock position when the notch engages the key lock control pin when placed in the position and the key lock control when the shift rod is placed in a position other than the parking position.・ The key lock control plate, which is provided so that the pin can swing between the non-locked position facing the part other than the cutout, and the ignition key connected to the key lock control plate. The key lock position that is provided on the part and enables the attachment / detachment of the ignition key,
The key lock control plate and the key interlock mechanism including a key lock member that is movable between the key lock member and the non-key lock position that prevents the key from being rotated to the lock position. Second biasing means for imparting a movement habit of moving the lock key to the lock position, holding the shift lock plate in the lock position when the ignition key is in the on position, and depressing the brake pedal. Shift lock device for an automatic transmission, comprising third biasing means for allowing the shift lock plate to move from the locked position to the unlocked position in response to the signal.