JP2003138823A - Door lock control method and door lock device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door lock control method for a vehicle, which can positively prevent unlocking of a door during traveling of the vehicle, to thereby improve the safety of door locking, and to provide a door lock device. SOLUTION: Door lock control for the vehicle is carried out by using a locking means which energizes a lock switching pin to a locking position by the force of a spring, and switches the lock switching pin to an unlocking position by supplying electric power to a solenoid 54. When the traveling speed of the vehicle is below a constant value, a control device 70 on-off-controls power supply from a power source 80 to the solenoid 54, based on a command input from outside. When the traveling speed of the vehicle is equal to or above the constant value, a vehicle speed detecting switch 81 is opened, and power supply from the power source 80 to the solenoid 54 is inhibited in spite of the input of the command.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock control method and a lock device for locking a vehicle door provided in a railway vehicle or the like in a fully closed position.

[0002]

2. Description of the Related Art Conventionally, as a means for opening and closing a door of a railroad vehicle, a device using a fluid pressure such as air pressure as a driving source has been widely used. In recent years, however, driving noise is reduced, control responsiveness and maintainability are improved. From the viewpoint of improvement, development of a door opening / closing device for a railway vehicle using an electric drive source such as a motor is underway.

In an apparatus using such a motor as a drive source, it is necessary to turn off the motor after the door is fully closed in order to prevent the motor from burning and to save electric power. Then, the door may move freely while the output shaft is freely rotating, so that it is necessary to separately provide a lock device for maintaining the fully closed state of the door.

A device disclosed in Japanese Patent Laid-Open No. 4-228788 has been known as a means for fully closing and locking the door. This device opens and closes the door by the feed screw mechanism, and when the door reaches the fully closed position, the locking means automatically operates by the force of the spring to lock the fully closed state. .

[0005]

In recent years, in order to perform the locking more reliably, an electric drive source such as a solenoid is used to lock the door in a fully closed position and to unlock the door. A locking device that can be switched to a new one has been developed (for example, actual Kaihei 9-19).
(See No. 9 microfilm). In such a lock device, lock control is performed such that the electric drive source is turned on / off based on the input of a predetermined lock release command (for example, an unlock command or a door open command).

However, in such an apparatus in which the lock control is performed independently of the door opening / closing drive control, the lock switching is performed in conjunction with the opening / closing of the door as in the apparatus disclosed in Japanese Patent Laid-Open No. 4-228788. Unlike what is done,
The lock may be accidentally released while the vehicle is traveling.

That is, since opening and closing of the vehicle door is prohibited in principle while the vehicle is running, for devices that perform lock switching in conjunction with opening and closing of the door, the door lock is released while the vehicle is running. However, in a lock device in which the lock switching is performed independently of the open / closed state of the vehicle door by a solenoid etc., the lock is released by accidentally inputting an unlock command while the vehicle is running. There is a risk of being destroyed.

In view of the above circumstances, the present invention provides a vehicle door lock control method and a locking device capable of reliably preventing unlocking while the vehicle is traveling to improve safety. With the goal.

[0009]

As a means for solving the above-mentioned problems, the present invention provides a lock position for locking a vehicle door to a fully closed position, and retreating from this lock position to release the vehicle door. A lock switching member that is switched to an unlock position, a spring member that urges the lock switching member to the lock position side, and an electromagnetic force that causes the lock switching member to move the lock switching member to the spring member. A method of performing lock control of a vehicle door using a lock device that includes an electromagnetic drive device that switches to the unlocked position against urging force, and is input from the outside when the traveling speed of the vehicle is less than a certain speed. Based on the command, the power supply to the electromagnetic drive device is turned on and off based on From is to prohibit the power supply to the electromagnetic driving device.

According to this method, in a safe state in which the traveling speed of the vehicle is less than a certain value, the power supply from the power source to the electromagnetic drive device is turned on and off based on a command input from the outside, so that a normal lock control is performed. On the other hand, when the traveling speed of the vehicle is equal to or higher than the certain speed, by prohibiting the power supply from the power source to the electromagnetic drive regardless of the input of the command, the door is accidentally unlocked while the vehicle is traveling. It is possible to reliably prevent the situation.

The release of the power supply prohibition may be performed immediately when the traveling speed of the vehicle becomes less than the certain speed, but in this way, the vehicle is further locked when the traveling speed is less than the certain speed. If the prohibition of power supply is released only when the release command is input, it is possible to prevent the lock from being released without the knowledge of the lock operator (eg, conductor).

The present invention also relates to a lock switching member for switching between a lock position for locking the vehicle door at the fully closed position and an unlock position for retracting the vehicle door and releasing the vehicle door, and the lock switching member. A spring member that biases the member toward the lock position, and an electromagnetic drive device that receives power from a power source to switch the lock switching member to the unlock position against the biasing force of the spring member by its electromagnetic force. And a lock device for a vehicle including a switching device for turning on / off power supply to the electromagnetic drive device, a lock control device for operating the switching device based on a command input from the outside, and a traveling speed of the vehicle at a constant speed. The speed detection means for detecting whether or not it is the above, and the electromagnetic drive device from the power source when it is detected that the traveling speed of the vehicle is a certain speed or more. It is obtained by a lock holding means for holding in the locked position the lock switching member regardless of the input of the instruction by preventing the power supply.

According to this device, the lock holding means does not operate in a safe state in which the traveling speed of the vehicle is less than a certain value, and the lock control means controls the electromagnetic wave from the power source based on a command input from the outside. The power supply to the drive is turned on and off. That is, the lock is switched. On the other hand, when it is detected that the traveling speed of the vehicle is equal to or higher than the predetermined speed, the lock holding means blocks the power supply from the power source to the electromagnetic drive device, so that the lock switching is performed regardless of the input of the command. The member is held in the locked position. Therefore, it is possible to reliably prevent the situation where the door is unlocked accidentally while the vehicle is traveling.

Further, the command input switch for inputting the unlock command and the blockage of the power supply are performed only when the input operation of the command input switch is performed while the traveling speed of the vehicle is less than the predetermined speed. If the lock holding release means for releasing the lock is provided, it becomes possible to return to the state where the lock can be switched based on the intention of the lock operator (for example, the conductor), and at the It is possible to prevent the situation where the lock is released.

The operation of prohibiting the power supply may be performed by a program of a microcomputer, for example, but the vehicle speed is opened when the traveling speed of the vehicle is equal to or higher than a certain speed, and is closed when the traveling speed of the vehicle is less than the certain speed. If the vehicle speed detection switch is provided with a detection switch and the vehicle speed detection switch is incorporated in a power supply circuit of the electromagnetic drive device such that power supply from the power supply to the electromagnetic drive device is disabled when the vehicle speed detection switch is opened. The vehicle speed detection switch can be used both as the vehicle speed detection means and the lock holding means, and the power supply can be reliably prevented when the vehicle is traveling with a simple configuration.

For example, if the vehicle speed detection switch is interposed between the power source and the electromagnetic drive device, the power supply to the electromagnetic drive is surely blocked by opening the switch.

In this case, a command input switch for inputting an unlock command, an opening / closing switch provided in series with the vehicle speed detection switch, and the opening / closing only when the input operation of the command input switch is performed. If the switch drive means for closing the switch is provided, the opening / closing switch is opened only by closing the vehicle speed detection switch due to a decrease in traveling speed, and thus the blocking of power supply to the electromagnetic drive device is not released. In addition, since the blocking of the power supply is released only when the opening / closing switch is closed by the input operation of the command input switch, it is possible to prevent the lock from being released without the knowledge of the lock operator.

That is, the opening / closing switch and the switch driving means release the lock holding release for releasing the blocking of the power feeding only when the input operation of the command input switch is performed in a state where the traveling speed of the vehicle is less than the certain speed. Constitutes a means.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings. Although the embodiment shown here is for locking a sliding door type vehicle door,
INDUSTRIAL APPLICABILITY The lock means according to the present invention can be effectively applied to locks of other types of doors such as hinged doors and folding doors.

In FIG. 1, a lock unit 30 is provided at a position immediately above the left and right sliding doors 10 (a position near the door tip in the illustrated example).
Is provided. The lock unit 30 locks the both sliding doors 10 in the fully closed position.

As shown in FIGS. 3 to 5, the lock unit 30 is provided with a vertical mounting plate 32, and the mounting plate 32 is fixed to the structure side by bolts or the like not shown.

A supporting shaft 34 protruding forward from a front side surface (right side surface in FIG. 5) of the mounting plate 32 is fixed to a predetermined portion (lower left side in FIG. 3) of the mounting plate 32. 36 is supported so as to be rotatable around the support shaft 34. Specifically, a circular through hole is provided in the intermediate portion of the rotating member 36, and the retaining ring 35 is attached to the tip of the support shaft 34 in a state where the through hole and the support shaft 34 are fitted together. .

A pair of left and right fork portions 36a and 36b are bifurcated at the lower end of the rotating member 36, and an engagement groove 36c is formed between the fork portions 36a and 36b. The engagement groove 36c has a substantially inverted U shape that is opened downward.

On the other hand, a bracket 17 (FIG. 5) protruding upward is fixed to the upper end of the one-side sliding door (the left sliding door in FIG. 1) near the door tip, and the bracket 17 (FIG. 5) is projected from the front side (FIG. 5, the engaging pin 18 projects to the right).

The engaging pin 18 is, as shown in FIG.
When the sliding door 10 is in the fully closed position, it has a diameter that allows the fork portions 36a and 36b to enter the engagement groove 36c with almost no space between the tip portions of the fork portions 36a and 36b.
3 is moved to the left side in FIG. 3 as the sliding door 10 moves in the opening direction from the fully closed position (two-dot chain line in the figure). Then, when the sliding door 10 is in the vicinity of the fully closed position (when the engagement pin 18 is in the area between the solid line position and the alternate long and two short dashes position in FIG. 3), the engagement pin 18 actually moves. In addition, it can enter (that is, can engage) into the engaging groove 36c.

Further, in this engaged state, as the sliding door 10 is opened and closed (that is, the engaging pin 18 is moved horizontally), the rotating member 36 is rotated around the support shaft 34. Mating groove 36c and both fork portions 36a, 36b
The shape of is set. Therefore, the rotating member 36 is located at the rotating angle position (upright position) shown by the solid line in FIG. 3 in the state where the sliding door 10 is fully closed, and from this position, the sliding door 10 is moved.
The rotational angle position shown by the chain double-dashed line in FIG. 3 as the lever opens (an inclined position where the engaging pin 18 is disengaged from the engaging groove 36c)
To the clockwise direction in FIG.

In the portion of the mounting plate 32 away from the support shaft 34 (upper right side in FIG. 3), the support shaft 34 is provided.
A support shaft (support member) 38 different from the above is fixed. This support shaft 38 also projects forward from the front surface of the mounting plate 32, and a lock arm (interlocking member) 40 is attached to the projecting portion.

More specifically, a cylindrical portion 40a having a circular through hole is formed at one end (base end) of the lock arm 40, and the cylindrical portion 40a is fitted to the outside of the support shaft 38. A retaining ring 42 is attached to the support shaft 38, and with this structure, the base end portion of the lock arm 40 (cylindrical portion 40
A) is supported by the support shaft 38 so as to be rotatable around the support shaft 38.

A torsion coil spring 44 is provided around the cylindrical portion 40a. This torsion coil spring 44
One end of the lock arm 40 is stopped by a pin 40b protruding from the back surface of the lock arm 40, and the other end is stopped by a pin 32b protruding from the front surface of the mounting plate 32. The lock arm 40 is biased by a force in a counterclockwise direction (counterclockwise direction in FIG. 3) when viewed from the front.

The other end (tip) of the lock arm 40
An engagement roller 48 is attached to the rotatably rotatable shaft about the axis in the front-rear direction. Specifically, as shown in FIG. 4, the shaft portion 46 projects rearward (upward in FIG. 4) from the back surface (rear side surface) of the lock arm 40, and the engagement roller 48 is rotatably fitted to the shaft portion 46. Has been done.

On the other hand, a pair of left and right fork portions 36d and 36e are formed in a bifurcated shape in the upper half of the rotating member 36, and the engaging roller 48 enters between the fork portions 36d and 36e. It is possible.

The inner surface of one fork portion 36d serves as a guide surface 36f for the engaging roller 48. The other end of the fork portion 36e is bent in a hook shape, and the end surface of the hook portion serves as a contact surface 36g capable of contacting the engagement roller 48.

Specifically, the engaging roller 48 contacts the end of the guide surface 36f at the rear side (the base side of the fork portion 36d) with the rotating member 36 in the inclined position shown by the chain double-dashed line in FIG. The contact roller (two-dot chain line in the figure), and the engagement roller as the rotation member 36 rotates from this position in the counterclockwise direction in the figure (direction in which the sliding door 10 moves toward the fully closed position). 48 rolls on the guide surface 36f in the direction toward the tip side of the fork portion 36d (that is, the engaging roller 48 rises as the lock arm 40 rotates), and finally the sliding door 10 is at the fully closed position. The state in which the rotation member 36 has reached
(In the state where it has reached the upright position indicated by the solid line in FIG. 3), the engaging roller 48 moves to the fork portion 36e as shown by the solid line in FIG.
The shape of the rotating member 36 is set so that it is guided to a position where it abuts against the abutment surface 36g at the tip of the.

In the illustrated example, the contact surface 36g is an arc surface having a radius of curvature slightly larger than the radius of the engaging roller 48. Then, the rotating member 36 at the portion (contact point) P where the engagement roller 48 contacts the contact surface 36g.
Of the rotation tangent direction (horizontal direction in the illustrated example) L (see FIG. 3).
The arrangement of the respective members is set so that the support shaft 38 is located on the alternate long and short dash line), and the position of the lock arm 40 in this state (the position shown by the solid line in FIG. 3) is referred to in the present invention as " It corresponds to the position corresponding to the fully closed position. That is, at this fully closed position, the lock arm 40 is interposed between the contact surface 36g of the rotating member 36 and the support shaft 38, and the rotating member 36 moves in the sliding door opening direction (clockwise direction in FIG. 3). Prevent it from turning.

The lock arm 40 is urged in the counterclockwise direction in FIG. 3 (the direction in which the engaging roller 48 is lowered) by its own weight and the elastic force of the torsion coil spring 44, but it is a rotating member. When 36 reaches the inclined position shown by the chain double-dashed line in FIG.
The engaging roller 48 is sandwiched between the d and 36f so that the engaging roller 48 cannot descend further (the lock arm 40 cannot rotate in the counterclockwise direction in FIG. 3).

That is, this inclined position is the movement limit position of the rotating member 36. Then, at this inclined position, the engaging groove 36c of the rotating member 36 is opened obliquely downward, and the engaging pin 18 on the side of the sliding door 10 can be received in the engaging groove 36c. The shape of the member 36 is set.

Further, the lock unit 30 is provided with a lock switching mechanism 50, and the lock switching mechanism 50 is
A lock state in which the lock arm 40 is held at the fully closed corresponding position and an unlock state in which the lock arm 40 is released can be switched.

The lock switching mechanism 50 includes a housing 52 as shown in FIG. 4, and the housing 52 is provided on the lower surface of a support plate portion 32a extending forward from the upper end of the mounting plate 32 (to the right in FIG. 5). It is fixed. As a result, the lock switching mechanism 50 as a whole is suspended and supported on the mounting plate 32 side, and is arranged in front of the mounting plate 32.

A solenoid 54, which is an electromagnetic drive device, and a guide member 58 that slidably supports a lock switching pin (lock switching member) 56 are fixed to the housing 52, and the driving force of the solenoid 54 is lock-switched. A drive transmission mechanism 60 that transmits to the pin 56 is incorporated.

The solenoid 54 has an output shaft 54a which moves relative to the main body in the protruding / retracting direction, and when an exciting current is input (power is supplied) from a control device 70, which will be described later, the electromagnetic force thereof is generated. The output shaft 54a is configured to project.

A sleeve 55 is provided around the output shaft 54a.
Is installed. The sleeve 55 is relatively immovable in the axial direction with respect to the output shaft 54a, and is relatively rotatable with respect to the output shaft 54a within a predetermined angle range about its central axis. The sleeve 55 has a pin 55a protruding from the outer peripheral surface thereof.

On the other hand, in the vicinity of the sleeve 55, there is provided a support shaft 51 projecting upward (toward this side in FIG. 4) from the bottom surface of the housing 50, and a torsion coil spring (spring member) is provided around the support shaft 51. 53 is attached.
One end of the torsion coil spring 53 is the pin 55.
a and the other end is fixed to a pin 52a provided on the housing 52 side.
By the elastic force of the sleeve 55 and the solenoid 54.
The output shaft 54a and the lock switching pin 56 are urged toward the side retracted into the solenoid body (the unlock position side).

The lock switching pin 56 extends in the front-rear direction (vertical direction in FIG. 4) and is supported by the guide member 58 so as to be movable in the front-rear direction. The lock position shown by the solid line in FIG.
As shown by the chain double-dashed line in FIG. 4, the lock position can be switched to the unlock position where the lock position is retracted.

The lock position is a position that projects to a position directly below the lock arm 40 at the fully closed corresponding position, and the lock switching pin 56 is present at this lock position, so that the lock arm 40 is fully closed. Rotation downward from the corresponding position is prevented. That is, the lock arm 40 is constrained to the fully closed corresponding position. On the other hand, the unlock position is a position retracted from the lock position to the extent that the lock switching pin 56 and the lock arm 40 do not interfere with each other, and the lock switching pin 56 is located at the unlock position. The lock arm 4 in the state
A downward rotation of 0 is allowed.

The drive transmission mechanism 60 includes the solenoid 54.
The movement of the sleeve 55 provided on the upper and lower sides is converted into the movement of the lock switching pin 56 in the front-rear direction, and is provided with a rotation link 62 as shown in FIG.

The rotation link 62 is supported by the support shaft 51 so as to be rotatable around the support shaft 51, and a predetermined portion thereof is coupled to the pin 55a of the sleeve 55 and the pin 55a. An elongated hole 62a penetrating the rotation link 62 is formed at a position deviated from.

On the other hand, a link connecting plate 64 is fixed to the rear end of the lock switching pin 56, and the link connecting plate 64 is also formed with a long hole 64a penetrating the link connecting plate 64. A common pin 66 is vertically inserted through the slot 64a and the slot 62a.

In this lock switching mechanism 50, when the output shaft 54a of the solenoid 54 and the sleeve 55 are in the retracted position as shown by the solid line in FIG. 4 by the elastic force of the torsion coil spring 53 (that is, the solenoid 54 is off). At this time, the lock switching pin 56 is switched to the lock position shown by the solid line in the figure, while the solenoid 54 is switched on from this state to output the output shaft 54a and the sleeve 55.
Along with the protruding position shown by the two-dot chain line in the figure,
The rotation link 62 rotates and the lock switching pin 56 is pulled in to the unlock position indicated by the chain double-dashed line in FIG.

In the vicinity of the link connecting plate 64,
A lock detection switch 68 for detecting whether or not the lock switching pin 56 is switched to the lock position is provided. The lock detection switch 68 is a limit switch in the illustrated example, and is a contactor 68a made of a roller.
have. Then, when the lock switching pin 56 advances to the lock position, its link coupling plate 64 contacts the contact 68a, and the lock detection switch 68 is switched from off to on.

FIG. 6 shows a control device 70 for controlling the operation of the opening / closing drive device 20 and the lock unit 30. The control device 70 includes an opening / closing drive control means 72 and a lock control means 74 which are shown in the figure.

The opening / closing drive control means 72 is the door closing switch 1
5, the detection signal output by the switch 5, the command signal output by the open command switch 76 and the simultaneous unlock switch 78, the motor 22
A signal is output to the motor drive circuit 21 based on the output signal of the encoder (i.e., the sliding door opening / closing drive amount detection signal), etc., and the drive control of the motor 22, namely the opening / closing drive control of the sliding door 10 is performed.

The lock control means 74 has a built-in timer and receives output signals of the vehicle speed detection switch 81 and the lock detection switch 68 in the lock unit 30 to supply power to the solenoid 54 of the lock unit 30 at a predetermined timing. On / off switching, that is, lock switching is performed.

The opening command switch 76 and the simultaneous unlocking switch 78 are provided at a specific operation place (for example, a passenger's cabin). The opening instruction switch 76 inputs an opening instruction signal for each door to the control device 70 by receiving an ON operation.
The simultaneous unlock switch 78 inputs an unlock command signal for simultaneously unlocking the doors to the control device 70 by receiving an ON operation during an emergency evacuation, for example. Both the switches 76 and 78 correspond to command input switches for inputting a lock release command.

Next, a specific example of a circuit incorporating the control device 70 will be described with reference to FIG.

The circuit shown in the figure is a power source (DC power source in the illustrated example).
80 and three relays R1, R2, R3.
The negative electrode of the power supply 80 is connected to the ground, while the power supply 80
A vehicle speed detection switch 81, a contact RS1 'of the relay R1, a solenoid 54 of the lock unit 30 and a transistor 82 as a switching means are arranged in series between the positive electrode of the above-mentioned and the ground. The relay contact RS1 'corresponds to the open / close switch according to the present invention.

The vehicle speed detection switch 81 is for detecting whether or not the traveling speed of the railway vehicle provided with the sliding door 10 is a certain speed or more, and the traveling speed is a certain speed (for example, 5 km / h) or more. When the speed is less than the certain speed, it opens, and when it is less than the certain speed, it closes.

The transistor 82 turns on / off the energization between the solenoid 54 and the ground according to the control signal output from the control device 70. Specifically, the transistor 82
Has a collector connected to the solenoid 54, an emitter connected to ground, and a base connected to the controller 70.

The open command switch 76 and the simultaneous unlock switch 78 are the vehicle speed detection switch 81 and the relay contact R.
It is provided in parallel with S1 ′, the solenoid 54, and the transistor 82. Both switches 76, 78
Is composed of a toggle switch, for example, and is configured to be closed when operated in the ON direction and conversely opened when operated in the OFF direction. Then, the open command switch 76
The coil RC2 of the relay R2 is provided in series with, and the coil RC3 of the relay R3 is provided in series with the simultaneous unlock switch 78.

The coil RC1 of the relay R1 is provided in parallel with the contact RS1 'of the relay R1, the solenoid 54, and the transistor 82. Then, the contacts R of the relays R2, R3 and R1 are connected in series with the relay coil RC1.
S2, RS3, RS1 are provided, and these relay contacts RS2, RS3, RS1 are arranged in parallel with each other.

The relay contacts RS1 and RS1 'are closed only when the relay coil RC1 is energized, and are opened when the coil RC1 is not energized. Similarly, relay contact RS
2 and RS3 are the relay coils RC2 and RC, respectively.
3 is closed only when power is supplied to each coil RC2, RC
Open when 3 is not energized.

These relays R1, R2 and R3 have a function as a switch driving means for closing the relay contact RS1 'when the open command switch 76 and the simultaneous unlock switch 78 are turned on ( Details below).

Next, the operation of the circuit including the control device 70 and the lock unit 30 will be described with reference to the time charts of FIGS. 8 and 9. The time chart of FIG. 8 shows the operation when the sliding door 10 is opened from the fully closed position, and the flowchart of FIG. 9 shows the operation when the sliding door 10 is returned to the fully closed position.

First, in a state before the vehicle reaches the stop position and the traveling speed thereof is equal to or higher than a certain speed, the vehicle speed detection switch 81 shown in FIG.
The power supply path from the solenoid to the solenoid 54 is forcibly cut off.

Therefore, in this state, even if the open command switch 76 and the simultaneous unlock switch 78 are erroneously turned on as shown at the left end of FIG. 8, the solenoid 54 is not supplied with power and the lock switching pin 56 is It is held in the locked position by the tensile force of the torsion coil spring 53. That is, each switch 7
A situation in which the door lock is released during traveling due to an erroneous operation of 6, 78 is reliably prevented.

At this time, the lock detection switch 68 is turned on, and the door closing switch 15 is turned on because the sliding door 10 is at the fully closed position.

After that, when the vehicle almost reaches the stop position and its traveling speed becomes less than a certain speed, the vehicle speed detection switch 81 is closed. However, at this stage, power supply to the solenoid 54 is impossible because the relay contact RS1 'is still open. By turning on the open command switch 76 in addition to closing the vehicle speed detection switch 81,
A door open command signal is input to the control device 70 (time T1 in FIG. 8), and the relay contacts RS1 'are closed by the action of the relays R1 and R2.

Specifically, when the open command switch 76 is closed, the relay coil RC2 is energized, the relay contact RS2 is closed along with the energization, and the relay contact R2 is closed.
The relay coil RC1 arranged in series with S2 is energized, so that the relay contact RS1 'is closed. At the same time, the relay contact RS1 is closed, and the relay R1 maintains the ON state (self-holding) regardless of whether the relay contact RS2 is opened or closed.

On the other hand, the control device 70 outputs a control signal to the transistor 82 at the time when the open command signal is input, and turns on the transistor 82. At this time,
Since the vehicle speed detection switch 81 and the relay contact RS1 'are both closed, power is supplied from the power supply 80 to the solenoid 54. That is, the solenoid 54 is switched on.

By the electromagnetic driving force of the solenoid 54,
The lock switching pin 56 retracts to the unlock position shown by the chain double-dashed line in FIG. 4 to release the lock of the lock arm 40. Along with this, the lock detection switch 68 is turned off. The control device 70 confirms the switch-off of the switch 68, that is, the lock release detection, and outputs a door drive signal for opening the sliding door 10 to the motor drive circuit 21 of the opening / closing drive device 20 (time T2).

The output of this door drive signal starts driving the sliding door 10 in the opening direction. Specifically, the driving pulley 23 shown in FIG. 1 rotates counterclockwise in FIG. 1 and the left and right sliding doors 10 slide in a direction in which they are separated from each other.
At this time, the engagement pin 18 provided on the sliding door 10 side
Since the rotating member 36 is engaged with the rotating member 36, the rotating member 36 moves from the upright position shown by the solid line in FIG. 3 to the inclined position shown by the chain double-dashed line in FIG. 3 in conjunction with the opening operation of the sliding door 10. The engaging pin 18 is disengaged from the rotating member 36 and the sliding door 10
Only the opening operation of is continued. Further, with the rotation of the rotating member 36, the lock arm 40 descends from the horizontal position (the position corresponding to the fully closed position) shown by the solid line in FIG.

Although the door drive signal is a pulse signal,
In order to gradually accelerate the sliding door 10 by this door drive signal, the duty ratio of the signal is gradually increased from 0% to the maximum value (70% in the illustrated example). Then, when the duty ratio reaches 70%, that is, when the acceleration in the opening direction of the sliding door 10 is completed (time T3), the transistor 82 is turned off. That is, the interruption of the power supply to the solenoid 54 is started, and the solenoid 54 is once turned off.

Due to this interruption of power supply, the solenoid 5
The driving force of No. 4 disappears, and the lock switching pin 56 tries to project to the lock position by the urging force of the torsion coil spring 53, but since the lock arm 40 that has moved to the movement limit position exists beyond that. The lock switching pin 56 does not reach the lock position and is pressed against the back surface of the lock arm 40 by the biasing force. That is,
The lock switching pin 56 contacts the lock arm 40 in the axial direction (operating direction).

After that, the duty ratio of the door drive signal is gradually reduced (the opening drive is decelerated), the duty ratio is maintained at 20%, and the slow running operation for the opening cushion is performed. When the sliding door 10 reaches the fully open position (time T
4) Switch the duty ratio to 4% and hold the fully open position.

When the open command switch 76 is turned off in this fully open state, the relay R2 is turned off and the input signal to the control device 70 is interrupted. That is,
The door open command signal is turned off, that is, switched to the close command signal (time T5 in FIG. 9).

Along with this, the control device 70 controls the sliding door 10
A door drive signal for closing the door is output to the motor drive circuit 21. Also at this time, the duty ratio of the door drive signal is gradually increased so that the maximum value is maintained when the maximum value (70% in the illustrated example) is reached.

Thereafter, the duty ratio is gradually reduced to decelerate the closing drive, and when the sliding door 10 reaches a predetermined position before the fully closed position, the duty ratio is 20%.
Simultaneously with the start of the closed cushion creeping operation maintained at, the transistor 82 is turned back on and the power supply to the solenoid 54 is restarted (time T6). As a result, the lock switching pin 56 is pulled back from the previously locked position to the unlocked position shown by the chain double-dashed line in FIG.

When the left sliding door 10 approaches the fully closed position, the engaging pin 18 thereof enters the engaging groove 36c of the rotating member 36 at the inclined position as shown by the chain double-dashed line in FIG. From the time when the engaging pin 18 enters the engaging groove 36c, the rotating member 36 moves upright as indicated by the solid line in FIG. 3 as the engaging pin 18 moves in the closing direction (moves to the right in FIG. 3). Start turning in the direction toward the position (counterclockwise direction in the figure).
Therefore, the lock arm 40 engaged with the rotating member 36 starts rotating in the clockwise direction in the figure against the elastic force (biasing force) of the torsion coil spring 44. At this time, since the lock switching pin 56 is retracted to the unlock position, it does not affect the movement of the lock arm 40.

As described above, the closing drive proceeds, the door closing switch 15 is turned on, and further, the position detection signal of the encoder built in the motor 22 is stopped and the sliding door 10 is stopped.
When it is detected that the doors have stopped, it is determined that the two sliding doors 10 have reached the position (temporary closed position) in which they are in contact with each other, and the duty ratio of the door drive signal is changed from 20% to 30%.
% To increase the closing driving force (time T7). As a result, the sliding doors 10 are strongly pressed against each other with the elastic deformation of the elastic member 11 provided at the door end, and reach the completely closed position.

At this time, in the lock unit 30, the rotating member 36 reaches the complete upright position shown by the solid line in FIG.
The contact surface 36g of the fork portion 36e and the lock arm 4
The lock arm 40 is automatically positioned at the position corresponding to the fully closed position where the engagement roller 48 of 0 abuts at the point P in FIG.

At this fully closed position, the support shaft 3 is located on the extension line L of the rotary member 36 at the contact point P in the rotational tangential direction.
8 is located, and the lock arm 40 is located at a so-called dead point. Therefore, the elastic force of the elastic member 11 of the sliding door 10 moves from the contact point P to the lock arm 40.
Even if it acts as a reaction force (a reaction force in the opening direction) T on the lock arm 40, the reaction force T does not act as a force for rotating the lock arm 40, but acts as a compression load exclusively on the lock arm 40.
In other words, the reaction force T is supported on the support shaft 38 side through the lock arm 40.

After the sliding door 10 has been completely closed in this way, the duty ratio of the door drive signal is reduced to 4% and the closing drive force is weaker than the normal drive force. At the same time as reducing the force, the timer built into the control device is started.

As a result of the lowering of the closing driving force in this way, the reaction force T transmitted from the rotating member 36 shown in FIG. 3 to the lock arm 40 is lowered, and the lock arm 40 maintains the position corresponding to full closing. However, at this point, the lock switching pin 5
Since 6 is still in the unlocked position, for example, when foreign matter such as clothes is caught between the sliding doors 10 in the fully closed position, the torsion coil spring 44 is attached by manually applying a force in the opening direction to the sliding door 10. It is possible to open the sliding door 10 while rotating the rotating member 36 and the lock arm 40 in a direction opposite to the above with the assistance of the force, whereby the foreign matter can be escaped. In this way, when the door close switch 15 is turned off,
The opening / closing drive control means 20 determines that an emergency opening operation has been performed and drives the sliding door 10 in the opening direction for a predetermined time.

On the other hand, when the door opening operation is not performed after the closing driving force is reduced to F2 and the timer is up with the door closing switch 15 kept ON (0.5 seconds has elapsed from the time point when the driving force decreased in the illustrated example). Then, the duty ratio of the door drive signal is raised to 30% again to push both the sliding doors 10 to the completely closed position again, and at the same time, the transistor 82 is turned off to turn off the solenoid 54 (time T).
8). As the electromagnetic driving force of the solenoid 54 disappears in this way, the lock switching pin 56 is moved from the unlocked position up to that point by the elastic force of the torsion coil spring 53 as shown in FIG.
And project to the lock position shown by the solid line in FIG. Due to the presence of the lock switching pin 56, the lock arm 40 cannot be disengaged from the fully closed corresponding position, so that the sliding door 10 connected to the lock arm 40 via the rotating member 36 is at the fully closed position. Locked. After such a lock operation is detected by the lock detection switch 68, the duty ratio of the door drive signal is set to 0% (that is, the motor 22 is de-energized) and the closing drive is ended.

After that, when the vehicle starts and the traveling speed becomes a certain speed or more, the vehicle speed detection switch 81 is opened and the power supply from the DC power supply 80 to the solenoid 54 is forcibly cut off again. At the same time, the coil RC1 of the relay R1 is also de-energized, and the contacts RS1, RS1 'are opened.

The operation shown above is performed by the open command switch 7
Operation when 6 is operated, but simultaneous unlock switch 7
When 8 is operated, the basic lock operation does not change.

That is, since the vehicle speed detection switch 81 is opened when the vehicle travels at a speed equal to or higher than a certain speed,
Even if the simultaneous unlock switch 78 is erroneously turned on, the solenoid 54 is not energized, and the situation where the lock is released during traveling can be reliably prevented. On the other hand, when the vehicle traveling speed is less than a certain speed or when the vehicle is substantially stopped, the vehicle speed detection switch 81 is closed, and when the simultaneous unlock switch 78 is turned on in this state, the coil RC of the relay R3 is turned on.
3 is energized, the contact RS3 is closed, and the coil R of the relay R1
1 is energized to open the contacts RS1 and RS1 ', a control signal is input from the control device 70 to the transistor 82, the transistor 82 is turned on, and the solenoid 54 is energized to release the lock.

When both the open command switch 76 and the simultaneous unlock switch 78 are turned off (that is, the relay coils RC2 and RC3 are not energized), the traveling speed decreases to less than a certain speed and the vehicle speed is detected. Switch 8
Even if 1 is closed, the solenoid 54 is not immediately energized (that is, unlocked) at that time. Contact RS2, RS3, RS1 are open and relay coil R
This is because the relay contact RS1 'is open because C1 is not energized.

In other words, the blocking of power supply to the solenoid 54 is released only when one of the switches 76 and 78 is turned on while the vehicle speed detection switch 81 is closed. Therefore, the situation in which the solenoid 54 is switched on (the lock is released) without the knowledge of the lock operator such as the conductor is surely prevented.

The present invention is not limited to the above embodiment, and the following forms can be taken as an example.

In the above-mentioned embodiment, two of the open command switch 76 and the simultaneous unlock switch 78 are used as command input switches.
Although one switch is provided, only one switch may be used as the command input switch. When the open command switch 76 is a command input switch, the timing and period for unlocking after the switch 76 is turned on may be set appropriately. For example, the solenoid 54 is always turned on during opening and closing of the door. You may make it hold | maintain.

In the above embodiment, the vehicle speed detection switch 8
Although 1 is used both as the vehicle speed detecting means and the lock holding means, for example, even if a sensor dedicated to detecting the vehicle speed is provided and the control device 70 performs the control to forcibly stop the power supply to the solenoid 54 based on the signal thereof. Good. However, by using the vehicle speed detection switch 81 as both the vehicle speed detection means and the lock holding means as shown in the figure, it is possible to reliably prevent unlocking during traveling with a simple configuration.

Further, even when the vehicle speed detection switch 81 is used both as the vehicle speed detection means and the lock holding means, the position is not limited to the position between the power source 80 and the solenoid 54 as shown in the drawing, but may be, for example, the control device 70. The vehicle speed detection switch 81 may be arranged at a position between the base of the transistor 82 and a position between the emitter of the transistor 82 and the ground.

In the present invention, regardless of the specific mechanism of the lock device, for example, the interlocking member is omitted, and the lock switching member is directly engaged with the engaging portion provided on the vehicle door to lock the same. However, it does not prevent application of the configuration of the conventionally known locking means. Further, the lock switching pin 56 may be directly connected to the plunger of the solenoid 54.

[0094]

As described above, according to the present invention, when the traveling speed of the vehicle is less than a certain speed, the power supply from the power source to the electromagnetic drive device is turned on / off based on a command input from the outside, and the traveling speed of the vehicle is reduced. When the speed is equal to or higher than the predetermined speed, the power supply from the power source to the electromagnetic drive device is prohibited regardless of the input of the command, so that the unlocking is surely prevented while the vehicle is traveling and the safety is improved. There is an effect that can be achieved.

[Brief description of drawings]

FIG. 1 is a front view showing an opening / closing drive device for a vehicle door according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a partial cross-sectional plan view of a lock unit for locking the door in a fully closed position.

FIG. 5 is a side view of the lock unit.

FIG. 6 is a block diagram showing a functional configuration of a control device that controls opening / closing driving and locking of the door.

FIG. 7 is a diagram showing a lock control circuit including the control device.

FIG. 8 is a time chart showing a control operation of the control device when the door is opened.

FIG. 9 is a time chart showing a control operation of the control device when the door is closed.

[Explanation of symbols]

10 Sliding door (vehicle door) 20 Open / close drive 30 lock unit 50 lock switching mechanism 53 Torsion coil spring (spring member) 54 Solenoid (Electromagnetic drive device) 56 Lock switching pin (Lock switching member) 70 Control device 74 Lock control means 76 Open command switch (command input switch) 78 Simultaneous unlock switch (command input switch) 80 power 81 Vehicle speed detection switch 82 transistor (switching means) R1, R2, R3 relay (switch drive means) RS1 'Relay contact (open / close switch)

Claims (7)

[Claims] 1. A lock switching member for switching between a lock position for locking a vehicle door at a fully closed position and an unlock position for withdrawing from the lock position to release the vehicle door, and the lock switching member. A spring member for biasing to the lock position side; and an electromagnetic drive device for switching the lock switching member to the unlock position against the biasing force of the spring member by the electromagnetic force of the spring member by receiving power supply from the power source. A method of performing lock control of a vehicle door using a lock device, when the traveling speed of the vehicle is less than a certain speed, based on a command input from the outside to turn on and off power supply to the electromagnetic drive device, When the traveling speed of the vehicle is equal to or higher than the predetermined speed, the power supply from the power source to the electromagnetic drive device is prohibited regardless of the input of the command. Lock control method. 2. The vehicle door lock control method according to claim 1, wherein the prohibition of power supply is released only when an unlock command is input in a state where the vehicle traveling speed is lower than the certain speed. A lock control method for a vehicle door, comprising: 3. A lock switching member for switching between a lock position for locking the vehicle door to a fully closed position and an unlock position for retracting the vehicle door to release the vehicle door, and the lock switching member. A spring member for urging the lock position side; and an electromagnetic drive device for switching the lock switching member to the unlock position against the urging force of the spring member by the electromagnetic force of the spring member by receiving electric power from the power source. In a vehicle lock device including a switching means for turning on / off power supply to an electromagnetic drive device, a lock control means for operating the switching means based on a command input from the outside, and a traveling speed of the vehicle is a certain speed or more. And a speed detecting means for detecting whether or not the traveling speed of the vehicle is equal to or higher than a certain speed, and blocking the power supply from the power source to the electromagnetic drive device. And a lock holding means for holding the lock switching member at the lock position regardless of the input of the command. 4. The vehicle door locking device according to claim 3, wherein a command input switch for inputting an unlock command and a command input switch for inputting the command input switch when the vehicle traveling speed is less than the predetermined speed. A lock device for a vehicle door, comprising lock holding release means for releasing the blocking of the power supply only when an operation is performed. 5. The vehicle door lock device according to claim 3, further comprising a vehicle speed detection switch that opens when the traveling speed of the vehicle is equal to or higher than a certain speed and closes when the traveling speed of the vehicle is less than the certain speed. A vehicle door lock device characterized in that the vehicle speed detection switch is incorporated in a power supply circuit of the electromagnetic drive device so that power supply from the power source to the electromagnetic drive device is disabled when the detection switch is opened. . 6. The vehicle door locking device according to claim 5, wherein the vehicle speed detection switch is interposed between the power supply and the electromagnetic drive device. 7. The vehicle door locking device according to claim 6, wherein a command input switch for inputting an unlock command, an opening / closing switch provided in series with the vehicle speed detection switch, and the opening / closing switch are provided. A lock device for a vehicle door, comprising: a switch driving means for closing the opening / closing switch only when an input operation of the command input switch is performed in a closed state.