JPH07139249A - Vehicle door closing device - Google Patents

Abstract

PURPOSE:To reduce as much of the time for the door to reach its full-closed position as possible even if a vehicle is full and to escape from the door without reopening or reclosing the door. CONSTITUTION:A vehicle door closing device using a double-acting fluid pressure cylinder 20 as a door closing machine is provided with a door driving force decrease means 14 for decreasing the force to open or close the door by increasing the internal pressure of a low- pressure side pressure chamber during the movement of the cylinder and a control portion 16 for controlling the door driving force decrease means by outputting a command to decrease the door driving force according to detection of someone being caught in doors 29, 30 during opening and closing stroke or detection of the full-open or full-closed state of the doors. The door driving force decrease means comprises a door driving force decrease valve 60 which is a solenoid valve by which a passage for connection to the low-pressure side pressure chamber is switched in response to a command from a discharging state to a state of being connected to a pressure fluid source. A pressure regulating valve 61 is provided between the door driving force decrease valve and the pressure fluid source. Direction-switching solenoid valves provided to correspond to both pressure chambers are switched by the door driving force decrease means so that the pressure chamber being connected to the discharge side is switched to the pressure fluid source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door tightening device having a safety function for temporarily weakening a force for opening and closing a door when a vehicle door is opened and closed by a person or an object being caught.

[0002]

2. Description of the Related Art
There is one described in the issue. This is a structure in which a pressure reducing valve is provided in the door driving fluid pressure cylinder in the middle of a closing operation supply / discharge pipe line to which pressure fluid is supplied when the door is closed, and the door closing force is opened when the door is closed. Since the pressure reducing valve is set to be weaker than the door opening force when the door is closed, even if a person is pinched when the door is closed, it can easily escape without receiving a strong impact force.

There is also a method of reopening and closing the door when a person or an object is caught when the door is closed. That is, generally, a door closing device for a vehicle door opens and closes the door by turning on and off an opening and closing switch provided in a passenger compartment, and when the door reaches a fully closed position, a door closing switch provided in a drive device. Detects this and outputs a signal to the driver's cab and the conductor's cab to enable power running (driving) of the vehicle. In the opening and closing process of the door of such a door tightening device,
When a person or an object is caught in the door, the door is reopened and closed by a door pinch switch provided on the door end side of the door and a door pinch detection device such as an encoder provided in the drive device. This door tip switch or door pinch detection device performs door pinch control until the door close switch is turned on, and when the door close switch is turned on, the door pinch control is performed assuming that the door has reached the fully closed position. Is configured to release. However, the door close switch is mounted so as to be turned on before the actual fully closed position of the door in order to reliably detect the fully closed position of the door. For this reason, when a thin thing such as a handbag string or infant's limbs is caught in the door, it cannot be detected by the door tip switch or the door pinch detection device because the door close switch is turned on, and the vehicle starts running and drags. There was a risk of causing an accident.

As a conventional means for solving such a problem, the one disclosed in Japanese Utility Model Laid-Open No. 1-129384 is a door tightening device which keeps the door end switch effective for a predetermined time even after the door close switch (limit switch) is turned on. was there. The outline is that the control circuit as shown in Fig. 8 is provided for the solenoid of the solenoid valve that supplies and discharges pressurized air to the cylinder that opens and closes the door, and opens the door even when a thin and small one is sandwiched. It is designed so that it can be inverted. That is, immediately before the door is in the closed position, if the door close switch 3 is switched to the closed position 3a while sandwiching a part of the passenger's body, the input terminal 8a of the timed relay 8 is not energized. Since the output is output to the output terminal 8b for a predetermined time period, if the door tip switch 4 is operating, it is output to the output terminal 5b of the time relay 5 to excite the solenoid valve solenoid 6 to immediately open and reverse the door. Is. In the figure, 1 is a power supply, 2 is a driver operation switch, and 7 is a thyristor.

In addition to this, in the case of a pneumatic door-closing machine, when the door is caught, the supply air pressure is reduced for a predetermined time set by a timer to facilitate the escape of a passenger who is caught. There are also things.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the case of No. 330, when the door is closed, the pressure of the fluid pressure cylinder for driving the door is always 5 kgf / cm ² to 1.5 kgf / cm ²
The door closing force becomes weak because the pressure is reduced to, for example, when the vehicle is full of passengers, the door closing speed decreases due to the pressure with which this passenger abuts the door, and it takes time for the door to reach the fully closed position. There was a problem that delayed the operation of the vehicle.

Further, the device disclosed in Japanese Utility Model Laid-Open No. 1-129384 is configured to reopen and close the door when the door tip switch 4 detects a door jam after the door close switch 3 is turned on. As a result, the door close switch 3 is set to the open position, so that the vehicle does not start. For example, if this device is used for a commuter train, train departure will be delayed by the amount of time required for re-opening and closing, which has been a cause of disturbed train schedules.

Further, when the door closing force is reduced for a predetermined time only by the timer, if the time is too short, the door closing force may increase before the state of the door pinching is resolved. When a person is pinched, I feel pain, and when a person is inside and the bag is outside, I don't have enough time to open the door to pull in the bag. In addition, since the time required to remove the door is not constant depending on the situation in the door-to-door state, there is a problem that the train departure time is delayed because the door is eventually lengthened with some allowance. The present invention makes it possible to shorten the time for the door to reach the fully closed position as much as possible even when the door is fully closed, and to allow the door to escape from the door-jamming state without reopening and closing the door. , It is intended to prevent train departure delays.

[0009]

According to the means of the present invention, there is provided a door closing device for a vehicle door, wherein a door closing machine for opening and closing a door uses a double-acting fluid pressure cylinder. A door driving force reducing means is provided to increase the internal pressure of the low pressure side pressure chamber when the cylinder is operating to reduce the door closing force, and the door is driven based on the detection of door jamming during the door closing process or the detection of full closing of the door. It is characterized in that a control unit for outputting a force reduction command to control the door driving force reduction means is provided. (Claim 1) According to the means of the present invention, in a door closing device for a vehicle door, the door closing machine for opening and closing the door uses a double-acting fluid pressure cylinder. Based on the detection of door jamming during the opening and closing process of the door, or the detection of full or full closing of the door, a means for reducing the door opening and closing force is provided to increase the internal pressure of the low pressure side pressure chamber during cylinder operation. It is characterized in that a control unit for outputting a door driving force reduction command to control the door driving force reducing means is provided. (Claim 2)

In such a door closing device for a vehicle door, the double-acting fluid pressure cylinder of the door closing machine supplies and discharges the pressure fluid from the pressure fluid source through the door closing solenoid valve. The door driving force reducing means is a door including a solenoid valve that switches a passage connected to the low pressure side pressure chamber from a discharge state to a state connected to the pressure fluid source in response to the door driving force reduction command. It is preferable that the driving force reduction valve is configured. (Claim 3) Further, from the solenoid valve, the door driving force reducing means switches a passage connected to the low pressure side pressure chamber from a discharge state to a state connected to the pressure fluid source in response to the door driving force reduction command. It is preferable that the door drive force reduction valve and the pressure control valve provided between the door drive force reduction valve and the pressure fluid source are formed. (Claim 4) In such a door closing device for a vehicle door, the double-acting fluid pressure cylinder of the door closing machine is provided with directional switching solenoid valves corresponding to both pressure chambers. And a structure for opening and closing the door by switchingly connecting the pressure chamber to the pressure fluid source side and the discharge side via the direction switching solenoid valve, and the door driving force reducing means is
It is preferable that the direction switching solenoid valve is switched in response to the door driving force reduction command to switch the pressure chamber connected to the discharge side to the state connected to the pressure fluid source. (Claim 5)

According to the means of the present invention, a door closing device for a vehicle, wherein the door closing machine for opening and closing the door uses a double-acting fluid pressure cylinder, when the double-acting fluid pressure cylinder operates. A door driving force reduction means for reducing the internal pressure of the high pressure side pressure chamber to reduce the door driving force is provided, and a door driving force reduction command is issued based on the detection of door jamming during the door closing process or the detection of full closing of the door. A control unit for outputting and controlling the door driving force reducing means is provided, and the double-acting fluid pressure cylinder of the door closing machine applies pressure via a direction switching solenoid valve provided corresponding to each of both pressure chambers. The chamber is switched between a pressure fluid source side and a discharge side to open and close the door, and the door driving force reducing means switches the direction switching solenoid valve in response to the door driving force reduction command to switch the pressure fluid. The pressure chamber connected to the source side to the discharge side. Characterized in that it is configured to switch the state of being connected. (Claim 6)

Further, the means of the present invention is a door closing apparatus for a vehicle door, wherein the door closing machine for opening and closing the door uses a double-acting fluid pressure cylinder, when the double-acting fluid pressure cylinder operates. The door driving force reduction means that reduces the inner pressure of the high pressure side pressure chamber to reduce the door driving force is provided, and the door driving force is reduced based on the detection of the door pinching during the opening and closing process of the door or the detection of the door being fully opened or fully closed. A control unit that outputs a command to control the door driving force reducing means is provided, and the double-acting fluid pressure cylinder of the door closing machine is provided with a directional switching solenoid valve provided corresponding to each of the pressure chambers. Is configured to open and close the door by switchingly connecting the pressure chamber to the pressure fluid source side and the discharge side, and the door driving force reducing means switches the direction switching solenoid valve in response to the door driving force reducing command to switch the direction switching solenoid valve. The pressure chamber connected to the pressure fluid source side Characterized in that said a structure for switching the state of being connected to the discharge side. (Claim 7)

Further, in such a door closing device for a vehicle door, the control section performs reverse operation in which at least the door is pushed against the door driving force from the time of detection based on the detection of door jamming. It is preferable that the door driving force decrease command is output during the period so as to maintain the door driving force decreasing state and the door driving force decreasing means is controlled.
(Claim 8) Further, the control unit detects the door has reached the fully closed position, and the vehicle reaches a predetermined speed after a detection signal from the door closing switch is input. It is preferable to further include a fully closed detection control unit that outputs a door driving force reduction command to the door driving force reduction unit. (Claim 9)

[0014]

In the present invention, the door driving force reducing means for increasing the internal pressure of the low pressure side pressure chamber during operation of the double-acting fluid pressure cylinder to reduce the door closing force is a fluid acting on both sides of the piston in the cylinder. The output (the force acting on the door) decreases as both pressures increase. Therefore, the device according to claim 1 of the present invention reduces the door driving force (door closing force) when the door is caught when the door is closed or when the door is fully closed. The device described in (1) reduces the door driving force (door closing force or door opening force) when the door is caught when the door is opened or closed, or when the door is fully closed or opened. You can push the door back in the opposite direction, which allows you to escape from the trapped state.

In the device according to claim 3 of the present invention, when the door driving force is reduced, the door driving force reducing valve is switched so that the internal pressure of the low pressure side pressure chamber during the operation of the double acting fluid pressure cylinder. To increase the pressure fluid source. According to a fourth aspect of the present invention, when the door driving force is reduced, the door driving force reduction valve is switched to change the internal pressure of the low pressure side pressure chamber during the operation of the double-acting fluid pressure cylinder. A fluid source is connected and augmented via a pressure regulating valve. Therefore, the degree of pressure increase can be adjusted by the pressure adjusting valve. In the device according to claim 5 of the present invention, when the door driving force is reduced, the one in which the pressure chambers of the cylinders in the two directional switching solenoid valves are connected to the discharge side is switched, and the pressure chambers are switched. A pressure fluid source is connected to to increase the internal pressure of the pressure chamber.

In the present invention, the door driving force reducing means for reducing the internal pressure of the high pressure side pressure chamber during operation of the double acting fluid pressure cylinder to reduce the door closing force is a fluid acting on both sides of the piston in the cylinder. The output (the force acting on the door) decreases as both pressures are reduced. Also, when the door driving force is reduced, the one that connects the cylinder pressure chamber to the high pressure side in both direction switching solenoid valves is switched, and the discharge side is connected to that pressure chamber. Reduce the internal pressure of. Therefore, in the device according to claim 6 of the present invention, the door driving force (door closing force) is reduced when the door is caught when the door is closed or when the door is fully closed. The device according to item 7, when the door is caught when the door is opened or closed, or when the device is in the fully closed or fully closed state, the door driving force (door closing force or door opening force) is reduced. In either case, the door can be pushed back in the opposite direction, so that the door can be escaped from the trapped state.
In the device according to claim 8 of the present invention, when the door pinching state occurs, the door driving force decreasing state is maintained during the reverse operation period of the door by the passenger for eliminating the door pinching state. Instead of reducing the door closing force for a predetermined time with a margin, the door closing force reducing time for surely eliminating the door clamping state at that time for canceling the door clamping state is provided.

An apparatus according to claim 9 of the present invention comprises:
When the door opens, passengers get on and off, and when the door closes,
If a small object that turns on the door close switch is sandwiched between the doors, the fully closed detection control unit drives the door until the vehicle reaches a predetermined speed after the door close switch is turned on. Since a force reduction command is output to reduce the door driving force (door closing force), the door can be pushed slightly against this door driving force, and the door is fully closed. It is possible to escape.

[0018]

FIG. 1 shows a first embodiment of the present invention. The door closing device includes a door closing machine 12, a door closing electromagnetic valve 13, a door closing force reducing means 14, a pressure fluid source 15 and the like which constitute the door closing device 11, and a control section 16 related to the door closing force reducing means 14. Consists of. The door closing device 11 is a fluid pressure type, and is a door closing machine 1.
2, a door closing solenoid valve 13, a door closing force reducing means 14, etc., and is formed as a unit as a Kamoi type door closing device.
In this embodiment, as the pressure fluid source 15, pressure air from a compressed air source provided in the vehicle is used. The door closing machine 12 connects the upper connecting rod and the left door connecting plate 23 to the piston rod 21 of the drive cylinder 20 (air cylinder), and the upper side of the upper part of the belt stretched by the pulleys 24 and 25 axially supported. The right end of the connecting rod is connected, the left end of the lower connecting rod 27 is connected to the lower portion of the stretched belt, and the right end of the lower connecting rod 27 is connected to the right door connecting plate 28.
And a right door 29 and a left door 30 are connected to the right and left door connecting plates 28 and 23, respectively.

The pressure chamber 3 on the right side of the cylinder 20 in the drawing
When pressure air is supplied to 1, the piston rod 21 moves leftward to open the doors 29 and 30, and when pressure air is supplied to the left pressure chamber 32, the piston rod 21 moves rightward to open the door. 29 and 30 are closed. Doors 29 and 3 that can be opened and closed
In the case of 0, the closed state is detected by a door close switch (not shown). The door close switch is fixed at a fixed position, and the switch push rod is attached to the door. When the door is at the fully closed position, the switch push rod pushes the door close switch to turn it on. Like the conventional door closing switch, the door closing switch is adjusted to be turned on slightly before the door is completely closed (the adjustment gauge having a thickness of 20 mm is sandwiched).

The door-closing solenoid valve 13 applies pressure air (5 kgf / cm ² ) from the pressure fluid source 15 to the pressure chamber 31 of the cylinder 20.
The cylinder 20 is operated by supplying / discharging to / from 32, and is constituted by an electromagnetic pilot valve 33 and a switching valve 34 as shown in a circuit diagram in FIG. The electromagnetic pilot valve 33 is adapted to be provided with an opening / closing signal from the passenger compartment, and when an open signal is provided (when the solenoid 33a is excited), the state is switched from the illustrated state to the switching valve 34. Is supplied to switch the valve 34
Also switches. As a result, the cylinder 20 operates and the doors 29 and 30 are opened. When a closing signal (demagnetization of the solenoid 33a) is given to the electromagnetic pilot valve 33, the state is switched to the illustrated state, and the doors 29 and 30 are closed.

The door closing force reducing means 14 comprises a door driving force reducing valve 60 and a pressure adjusting valve 61 which are switching solenoid valves. As shown in the circuit diagram of FIG. 1, the door driving force reduction valve 60 is provided so as to switch the right side pressure chamber 31 between the door closing electromagnetic valve 13 and the pressure fluid source 15 side. A pressure adjusting valve 61 is provided between the port connected to the side and the pressure fluid source 15. The pressure adjusting valve 61 is opened until the outlet pressure on the door driving force reducing valve 60 side drops to a predetermined set pressure (for example, 4 kgf / cm ² ) and the spring pressure is set so that the pressure fluid is discharged from the discharge port. There is. The door driving force reduction valve 60 is provided with a passage 39 connected to the right pressure chamber 31.
Is switched to a state of being connected to the pressure fluid source 15 side by a door driving force reduction command (exciting the solenoid 60a). This raises the pressure in the passage 39 to 4 kgf / cm ² . That is, the pressurized air is supplied to the cylinder 20 to increase the pressure, and the door closing force, which is the force in the closing direction of the doors 29 and 30, decreases.

The control unit 16 detects a door jam and performs a door drive force reduction control, a portion that detects a backward movement of the door in the opening direction and performs a door drive force reduction control, and a door. And a portion for detecting the fully closed state of the door and performing a door driving force reduction control.
In this embodiment, the door driving force reduction control is performed by the door 2
This is a control for reducing the force in the direction of closing 9, 30, that is, a door closing force reduction control. The part that detects the door pinch and performs the door closing force reduction control is the door pinched state of the doors 29 and 30, that is, the doors 29 and 3.
A state in which a person or an object is sandwiched between 0 is detected, and when the door sandwiched state is detected, a door closing force reduction command (pressure increase command) is given to the door driving force reduction valve 60. Has become. Then, the part that detects the backward movement in the opening direction of the door when the door is pinched and performs the door closing force reduction control detects whether or not the vehicle is moving backward, that is, whether the passenger pushes the doors 29 and 30 open. Whether or not it is detected, and at least during the opening operation period when the door is pushed open, the door driving force reduction valve 60 is given a door closing force reduction command (pressure increase command). In addition, the part that detects the full closing of the door and performs the door closing force reduction control is such that the vehicle is at a predetermined speed, for example, 5 km after the door closing signal of the door closing switch is input.
Until / h, is reached, the door driving force reduction valve 60 is given a door closing force reduction command (pressure increase command).

The configuration of the portion for detecting the door jam and performing the door closing force reduction control is as shown in FIG. 1 by the position detecting means 42, the door nipping detection or fully closed detection setting section 43, the speed detecting means 44, and the speed setting section 45. , A speed comparison unit 46, a timer 47, a door closing force reduction command output unit 48, and the like. The position detection means 42 is
The moving positions of the doors 29 and 30 are detected based on the pulse from the rotary encoder 41 provided on the support shaft of the pulley 25 of the door closing machine 12. The door pinch detection or fully closed detection setting unit 43 receives the open command signal, the door close switch signal, and the pressure increase mode signal (mode signal for selecting whether to perform door pinch detection) to detect the door pinch detection state ( It is determined whether or not it is in a state of detecting a door pinch. Further, the door pinch detection or full-closed detection setting unit 43 sets the door pinch detection region within the movement range of the door, and until the doors 29 and 30 are closed to some extent (for example, more than the width of a person). A knob 50A is provided for setting a dead region (see FIG. 2) in which door pinch detection is not performed (during a large opening width).
Further, when the door is turned over by the conductor's operation, there is an inversion insensitive region where door pinch detection is not performed in order to prevent erroneous operation between the inversion position and the door closing speed above a certain level. Is set to.

This door pinch detection or fully closed detection setting section 43
Is based on the signal from the position detecting means 42, the doors 29, 30.
Is located in the door pinch dead area, and when the door pinch detection state and the doors 29 and 30 are not in the door pinch dead area, a door pinch ON signal indicating the door pinch detection area is sent to the speed comparison unit 46. It is designed to output. The speed comparison unit 46
Only when the door-pinch ON signal is input, the moving speed of the doors 29, 30 from the speed detecting means 44 and the reference speed set as the door-pinch detection speed threshold value in the speed setting section 45 by the threshold value setting device 49. If it is smaller than the threshold value as a result of comparing
Is output to. FIG. 2 shows an example of the relationship between the threshold value for detecting the door pinch and the normal door speed (speed in the closing direction).
Shown in. In the figure, the range in which the door speed is decreasing near the fully closed position is the cushion area, and the threshold value is set low corresponding to this. The higher one is the threshold (H),
The lower one is the threshold value (L). Note that the door-closed switch-on area in the figure is a dead area. This is because when the door reaches the fully closed position, the speed becomes 0 and it is detected as a door pinched state. However, when the fully-closed decompression described below is performed, it is not necessary to set it as a dead area because it becomes an automatic door closing force decrease area.

The timer 47 has a set time (1) knob 5
It has 0B and a set time (2) knob 50C. The knob 50B sets a time T1 at which the door closing force reduction command output unit 48 outputs the door-nipting door-closing force reduction command signal, and the knob 50C sets a time T2 at which the door-nip detection is not performed after the time T1 has elapsed. Is to be set. The door closing force decrease command output unit 48 gives a door closing force decrease command (pressure increase command) to the door driving force decrease valve 60 according to the timer 47. Without this door closing force reduction command (pressure increase command), the normal door closing force command (pressure reduction command) is used. The time T1 is the time during which the door closing force is being reduced, and is the time required for a person or an object to escape when the door pinching state occurs. As shown in FIG. 3, this time T
After the lapse of 1, the original depressurized state is restored, but after that time T2
During that period, the door pinch detection is not performed. This is to determine whether a person or object in the door-jammed state has escaped. After the time T2, the door-jamming detection is restarted, and if the door speed is equal to or higher than the reference speed, the door is fully closed. If the moving speed of the door is less than or equal to the reference speed, the door-closing state continues, so a door closing force reduction command is issued.

The position detecting means 4 is provided for the structure of the portion for detecting the backward movement of the door in the opening direction when the door is pinched and performing the door closing force reduction control.
2, speed detection means 44, door-pinch detection or full-closed detection setting unit 43, and the like. Door pinch detection or fully closed detection setting unit 4
3 detects the door stop due to the door pinch based on the signals from the position detecting means 42 and the speed detecting means 44, stores the stop position, detects the backward movement of the door, and reverses the door sandwiching during the backward movement of the door. The door closing force decrease command signal is given to the door closing force decrease command output unit 48. When the signal from the timer 47 is interrupted and the backward door closing force decrease command signal is still generated, the door closing force decrease command output unit 48 continuously outputs the door closing force decrease command. That is, as shown in FIG. 3, when the set time T1 set by the timer 47 is insufficient for the door closing force reduction time (pressure increase time) for eliminating the door jam, the time Tx is extended.

The configuration of the portion for detecting the fully closed door and controlling the pressure increase is constituted by the door pinch detection or fully closed detection setting portion 43 and the door closing force reduction command output portion 48 in FIG.
The door pinch detection or fully closed detection setting unit 43 receives a door closed signal (door closed detection signal) from a door closed switch in addition to the above-mentioned function, and receives a door open / close command (door open command, door close command) from the palm room. In response to the vehicle speed detection signal from the speed detection unit, the door closing force decrease command output unit 48 outputs a fully closed door closing force decrease signal, and the door driving force decrease valve 60 outputs a door closing force decrease command (pressure increase command). ) Is given. Door pinch detection or fully closed detection setting unit 4
As shown in FIG. 3, 3 outputs the fully-closed door closing force decrease signal from when the door closing switch signal is input until the vehicle starts and reaches a predetermined speed, for example, 5 km / h. However, if a situation occurs where the door close switch does not turn on, that is, if the door is forcibly opened until the door close switch is turned off to allow the fingers or small objects to be caught and to escape, increase With the pressure timer, the pressure increase state is maintained for only 2 seconds, and then the fully closed door closing force reduction (fully closed pressure increase) is interrupted, the pressure is once reduced, and the fully closed pressure increase is performed again.

The door pinch detection or fully closed detection setting section 43 has an interlock circuit. The interlock circuit is for the solenoid 60a of the door driving force reduction valve 60, and can issue a fully closed pressure increasing command in the interlock released state, but cannot issue a fully closed pressure increasing command in the interlock set state. . This interlock circuit is set when the interlock is released when an open command is issued and then the vehicle speed exceeds 5 km / h, but when the power is turned off and then turned on again, Even if the door is fully closed (the door close switch is on), the pressure will not increase. Even if the vehicle arrives at the next station after the vehicle starts or if the red light causes the vehicle speed to drop below 5 km / h, the pressure will increase. This is because it does not. In FIG. 1, reference numeral 51 is a pressure increase mode switching section, which is used to set the modes of the door pinch detection or fully closed detection setting section 43 to the door pinch pressure increase mode, the fully closed pressure increase mode, the door pinch increased pressure and the fully closed pressure increase. It switches to the pressure mode.

The vehicle door-fastening device thus constructed is
When the pressure increase mode switching unit 51 is in the door-pinched pressure increase mode and the fully closed pressure increase mode, the operation is as follows. Doors 29 and 30
When the door is caught during the closing process, the control unit 1
6, the door-closing detection door closing force reduction control (pressure increase) is performed as described above, and the door closing force reduction command (pressure increase command) of the switching signal is performed.
Is issued. By this command, the door driving force reducing valve 60 of the door closing force reducing means 14 is switched to increase the pressure in the right pressure chamber 31 of the cylinder 20 from the exhausted state to 4 Kgf / cm ² . As a result, the door closing force is weakened, so that a person or an object in a state of being caught in the door can easily escape. The pressure increase at this time is performed at time T1 shown in FIG. 3, and if the escape is not completed during this time, it is performed again after time T2, and the pressure increase and exhaust of the right pressure chamber 31 are performed until the escape is completed. Is repeated. However, when the state in which the door is pushed open while the door closing force is decreasing exceeds the range of time T1,
During the time period Tx which is exceeded, a door closing force decrease command (pressure increase command) is issued by the door-jamming retrograde door closing force decrease command signal, and the door closing force decrease state continues.

When the doors 29 and 30 are in the fully closed state in which the door close switch is turned on, the control unit 16 performs the fully closed detection door closing force reduction control (pressure increase control) as described above, and the door jamming occurs. A door closing force reduction command (pressure increase command) is issued regardless of the state. In response to this command, the air pressure supplied to the right pressure chamber 31 of the cylinder 20 is also increased, so that the door closing action force is weakened, and if there is a person or thing in a door-jammed state, it easily escapes. become able to. As shown in FIG. 3, this pressure increase is performed until the vehicle speed reaches 5 km / h after the door close switch is turned on, and the pressure increase command disappears, that is, the pressure reduction signal is given to the cylinder 20. The air pressure supplied to the right side pressure chamber 31 is reduced to an exhaust state. It should be noted that the doors 29, 3 are opened in order to escape from the door-clamped state while the pressure increase control for fully closed detection is being performed.
When 0 is pushed open to the extent that the door close switch is turned off, the pressure increase timer (not shown) maintains the pressure increase state for 2 seconds, and then the pressure is temporarily reduced to perform the fully closed detection pressure increase control again.

FIG. 4, FIG. 5, and FIG. 6 are flow charts showing the operation of the control section 16 more specifically, which will be described. When the power is turned on in step S1, it is determined in step S2 whether or not the door close switch is on, and if it is on, the process proceeds to step S3, and full close is detected and stroke 0 is set in step S3. . Next step S4
Initial setting is performed in step S5, the setting value is read in step S5, and the setting mode of the pressure increase mode switching unit 51 is step S6 for detecting the door jam detection pressure increase mode (the mode for detecting the door jam and increasing the pressure). Determine whether it is the full-closed detection pressure increase mode (a mode to increase the pressure by detecting full-closed) or the door pinch detection and full-closed detection pressure increase mode. If it is the pinch detection and full-closed detection pressure increasing mode, the process proceeds to step S7, and if it is the full-closed detection pressure increasing mode, the process proceeds to step S32.

In step S7, it is judged whether it is an open command or a close command. When the open command is issued, the process proceeds to step S8, the open setting and interlock release are performed, and the process returns to step S7.
When the close command is issued, the process proceeds to step S9. In step S9, the closed setting is performed, and the process proceeds to step S10. In step S10, it is determined whether or not the door close switch is on. If the switch is on, the process proceeds to step S11, and it is determined whether or not the fully closed pressure increase is performed. When it is determined in step S11 that the fully closed pressure increase is not performed, the process proceeds to step S12, the interlock is set, and the process returns to step S5. Step S
When it is determined in 11 that the fully closed pressure increase is to be performed, the process proceeds to step S32. When it is determined in step S10 that the door close switch is not on, the process proceeds to step S13. When it is determined in steps S13 to S15 that the interlock is released, the stroke is not insensitive, and it is not within 3 mm from the start of closing, the process proceeds to step S16. In step S16, if it is the cushion region, the process proceeds to step S17 to set the threshold value (L), and if it is not the cushion region, the process proceeds to step S18 to set the threshold value (H). Next step S19
Move to. When the interlock is not released in step S13, the stroke is insensitive in step S14, and when the stroke is within 3 mm from the start of closing in step S15, the process returns to step S7.

In step S19, when it is determined that the door speed is less than or equal to the threshold value, this is when the person or object is sandwiched between the doors and is in the door-sandwich state, and the process proceeds to step S20. The stop position of the door is memorized, the timer is started, and the process proceeds to step S21 where a pressure increase command (door closing force decrease command) is issued and the door drive force decrease valve 60 operates to switch the pressure adjustment valve in the passage 39. The pressure air source 15 is connected via 61 to increase the pressure in the right pressure chamber 31 of the cylinder 20 to reduce the door closing force. Therefore, it becomes possible to escape a person or an object in a state of being trapped in the door. Step S1
If the speed is not equal to or less than the threshold value in step 9, the process returns to step S7. From step S21, the process proceeds to step S22 to determine whether or not the pressure boosting time (T1 in FIG. 3) is completed. If not completed, the process proceeds to step S23, and if an open command is issued, the process proceeds to step S24. After the shift, a pressure reduction command (no door closing force reduction command) is issued to reduce the pressure, and the process returns to step S7.
When the close command is issued in step S23, step S2
Return to 2. When the pressure boosting time is completed in step S22, the process proceeds to step S25, and it is determined whether the stored stop position is opened. When it is opened, the process proceeds to step S26, and it is determined whether the push-opening is being performed. When the push-opening is not performed (when Tx in FIG. 3 ends), the step S2 is performed.
Move to 7. In step S27, the closing operation or stop is performed, and the process proceeds to step S28. The pressure increase is completed in step S28, and a pressure reduction command (no door closing force reduction command, that is, no pressure increase command) is issued in step S29, and the timer is started to reduce the pressure. Next step S3
At 0, it is determined whether or not the depressurization time (T2 in FIG. 3) is completed. If not completed, the process proceeds to step S31, and if an open command is issued, the process returns to step S7. When the close command is issued in step S31, the process returns to step S30.

When the process moves from step S6 or step S11 to step S32, it is judged whether it is an open command or a close command. If an open command is issued, the process moves to step S33 to set open, and the interlock is released to step S6. Move to. If it is the close command in step S32, the process proceeds to step S34 to set the close, and if the interlock is released in the next step S35, then the next step S36.
When the door close switch is on, the pressure increase command (door close force decrease command) is issued in step S37. By this command, pressure increase near the fully closed position in FIG. 3 is performed. Therefore, even if a finger, a thin object, or the like is in a state of being caught in the door, it can be escaped. If the interlock is not released in step S35, or if the door close switch is not turned on in step S36, the process returns to step S32. In step S38 subsequent to step S37, it is determined whether or not the door closing switch is on. If it is on, the process proceeds to step S42, and if the door closing switch is not on, that is, a small object is squeezed to escape. Therefore, when the door is opened until the door close switch is turned off, the process proceeds to step S39 to start the pressure increase timer. In step S40 following step S39, it is determined whether the command is an open command or a close command. If the command is a close command, the process proceeds to step S41 and step S41.
It is determined whether or not the pressure boosting timer is completed, and if not completed, the process returns to step S40. If the open command is issued in step S40, or if the pressure boosting timer is completed (two seconds have passed) in step S41, the process goes through step S46 to step S32.
Return to. That is, the fully closed pressure increase is performed again.

When the process moves from step S38 to step S42, it is judged whether the command is an open command or a close command. If the command is an open command, the process returns to step S32 through step S46, and if the command is a close command, the process moves to step S43. In step S43, it is determined whether or not the train has started and the vehicle speed has reached 5 km / h. If it has not reached 5 km / h, the process returns to step S38,
If it has reached 5 Km / h, the process proceeds to step S44 and the pressure is reduced (no door closing force reduction command is issued). In the next step S45, the interlock is set and the process returns to step S5.

In the first embodiment described above, the pressure increasing mode switching unit 51 of the control unit 16 has been described as the door pinching pressure increasing mode and the fully closed pressure increasing mode. Is only for door pinch detection pressure increase control or only fully closed detection pressure increase control. It is conceivable that the control unit 16 may be a door-pinch detection control unit that performs only the door-pinch detection pressure increase control, that is, only the door-pinch detection door closing force decrease control. Good.

Further, in the first embodiment, the passage 61a connected to the pressurized air source 15 of the door closing force reducing means 14 may be connected in the middle of the passage 59 connected to the left pressure chamber 32 of the cylinder 20. Further, the pressure adjusting valve 61 of the door closing force reducing means 14 can be omitted. In that case, the acting force of the air pressure acting on the piston due to the pressure increase in the right pressure chamber 31 increases in the door opening direction by the integral of the cross section of the piston rod 21. For this reason, if the pressure increasing time is long, the door will try to open, but the control time by the timer 47 causes practically little problem. When the door-jamming retrograde detection control is enabled, a pressure sensor is provided in the right pressure chamber 31 of the cylinder 20 so as to prevent retrogression due to increased pressure, and the boosted pressure is limited by the signal of this pressure sensor. It may be configured.

Further, in the first embodiment, the state of the door-clamping is considered in the door-closing stroke in which the door is closed and in the door-closing state, but the door-clamping between the door and the door pocket is also performed in the door-opening stroke in which the door is opened. Can be considered. In order to cope with the door jamming in the door opening stroke, the door opening force reducing means having the same structure as the door closing force reducing means 14 is connected to the middle of the passage 59 connecting the right pressure chamber 32 and the pressure air source 15. The control section 16 may detect the door jamming during the door opening stroke as well as the door jamming during the door closing stroke and output it as a door opening force reduction command to control the door opening force reducing means. You can do this. Even when the door is caught in the fully open state, it can be dealt with by performing the fully open control as in the fully closed control described above.

The second embodiment of the present invention will be described with reference to FIG. In this embodiment, the door closing machine 12 of the first embodiment is used.
Using the same door closing machine 12 as above, the door closing solenoid valve 1 of the first embodiment
3 and the door closing force reducing means 14 are provided with two-position / three-way switching solenoid valves 71 and 72 and an OR circuit 75 as a signal circuit, and the control unit that outputs the door closing force reduction command is the first.
The configuration of the control unit 16 of the embodiment is applied as it is. Therefore, the difference from the first embodiment is mainly the related configuration of the two-position three-way switching solenoid valves 71, 72. The two-position / three-way switching solenoid valves 71, 72 are provided in the cylinder 20 as shown.
One of the pressure chambers 31 and 32 is connected to the pressure chambers 31 and 32 via passages 73 and 74, respectively, and the other is switched to the pressure air source 15 and the exhaust port. The illustrated state is a state in which the door is in the door closing stroke or the door closing position due to the door closing command (no signal). A drive signal is applied to the solenoid of the solenoid valve 71 via the OR circuit 75.
A door opening command and a door closing force decrease command are given to the. A door opening command is given to the solenoid of the solenoid valve 72 as a drive signal.

In this door tightening device, the solenoid valves 71 and 72 are in the switching positions shown in the drawing without the door opening command and the door closing force reduction command, and the pressure air from the pressure air source 15 is left side pressure chamber 3
2, the right pressure chamber 31 is in the exhaust state, the piston rod 21 moves to the right side in the figure, and the door closes. When a door open command is issued from the passenger compartment, the command causes the solenoid valve 7
1, 72 are switched from the illustrated switching position, the right pressure chamber 31 is supplied with pressurized air, the left pressure chamber 32 is in an exhaust state, and the door is opened. Then, as described in the first embodiment, the control unit 16 detects when the door is pinched during the door closing stroke (when there is no door opening command) and when the fully closed state is detected.
Since the door closing force decrease command is output from the solenoid valve 71, the electromagnetic valve 71 is switched from the switching position shown in the figure by the door closing force decrease command to supply the pressure air to the right pressure chamber 31. As a result, the door closing force is reduced, and it becomes possible to escape from the state of being pinched. Since the effective pressure receiving area of the piston is different between the side where the piston rod 21 is present and the side where the piston rod 21 is not present, the door may move a little in the direction of opening, but there is no problem in practice. If necessary, the door closing force decrease command should be canceled when the time set by the timer has elapsed, or the controller should be set to an appropriate pressure using a pressure sensor to limit the pressure increase. Since this is possible, this may be done. This is more cost effective than providing the pressure regulating valve as in the first embodiment.

In the construction using the solenoid valves 71 and 72 of the second embodiment, when the door jamming detection control or the full opening detection control of the door opening stroke is performed, the control unit controls the door jamming detection and the full opening detection. In order to output the door opening force reduction command by substantially the same configuration as the control unit 16 of the first embodiment, a drive signal given to the solenoid of the solenoid valve 71 is opened as shown in FIG. 7B. The command may be based on a command, and the drive signal to be given to the solenoid of the solenoid valve 72 may be given to the door opening command and the door opening force reduction command via the exclusive OR circuit 76. This exclusive OR circuit outputs the solenoid drive signal when only one of the door opening command and the door opening force reduction command is given, but when both commands are given and both commands are given. When it is not given, the solenoid drive signal is not output. Thus, when the door opening force decrease command is given to the solenoid valve 72 side in the state where the solenoid valves 71 and 72 are in the switching position according to the illustrated open command, only the solenoid valve 72 is switched, and the left pressure chamber 32 is supplied with the pressure air source. Since 15 is connected to increase the pressure and the door opening force is reduced, it is possible to escape from the state of the door being pinched. Further, in the second embodiment, the solenoid valve 72 of FIG. 7A is used in order to perform the door pinch detection control for both the closed stroke and the open stroke and the fully closed and full open detection control.
The signal circuit for driving the solenoid of FIG. 7 may be the one having the exclusive OR circuit 76 of the solenoid valve 72 of FIG. 7B.

A third embodiment of the present invention will be described with reference to FIG. This embodiment is a modification of the second embodiment, and the door closing force is reduced by decompressing the high pressure side of the pressure chamber of the cylinder. The difference from the second embodiment shown in FIG. 7A is only the circuit of the drive signal given to each solenoid of the solenoid valves 71 and 72, and the solenoid valve 71 of FIG. This is a configuration in which only the valve 72 is replaced. With this configuration, in the illustrated door closing stroke or door closing state, when the door closing force decrease command is given, the solenoid valve 72 switches, and the left side pressure chamber 32 on the high pressure side is in the exhaust state and the pressure is reduced. Since it decreases, the door closing force is reduced. Therefore, it becomes possible to escape from the state of being pinched.

Further, in the case where the high pressure side of the pressure chamber of this cylinder is depressurized and the door opening force is reduced so as to correspond to the door pinching during the door opening stroke, as shown in FIG. 8 (b), Figure 7
The exclusive OR circuit 76 described in (b) is applied to the drive signal circuit of the solenoid of the solenoid valve 71. The switching state of the solenoid valves 71 and 72 (right side pressure chamber is high pressure) switched by the door opening command of FIG. 8B is given to the solenoid of the solenoid valve 71 by the door opening force decrease command to the solenoid valve 71 side. The drive signal to be removed disappears, the solenoid valve 71 returns to the original state, and the right pressure chamber 31 is put into the exhaust state. As a result, both pressure chambers 31 and 32 are in an exhausted state, the door opening force is reduced, and it becomes possible to escape from the door-clamped state. Further, in the third embodiment, in order to perform the door pinch detection control for both the closed stroke and the open stroke and the fully closed and fully open detection control,
The exclusive OR circuit 76 of the solenoid valve 71 of FIG. 8B is added to the signal circuit that drives the solenoid of the solenoid valve 71 of FIG. 8A.
What has "" may be applied.

[0044]

According to the invention as set forth in claim 1, when the door is caught, the door closing force that causes the door is reduced, so that it is possible to escape from the door. It is possible to prevent the passengers from being continuously tightened by the normal door closing force. Also, since the door closing force is reduced when the door is fully closed, the door closing force is reduced when the door is caught when it cannot be detected in the fully closed state. It is possible to escape from the state, and it is possible to prevent the passenger from being continuously tightened by the normal door closing force. According to the invention of claim 2, when the door-jamming state occurs, the door closing force or the door-opening force that causes the door-jamming is reduced, so that it is possible to escape from the door-jagging state, It is possible to prevent the passenger from being continuously tightened by the door closing force or the door opening force. Further, since the door driving force is reduced when the door is fully opened or fully closed, the door opening / closing force is reduced when the door is jammed when it cannot be detected in the fully opened or fully closed state. Therefore, it is possible to escape from the state of being pinched by the door, and it is possible to prevent the passenger from being continuously tightened by the normal door driving force. Further, according to the first and second aspects of the present invention, the pressure fluid that generates the normal door closing force is supplied without decreasing the door closing force until the door pinching state is detected. Normal door speed is secured. Therefore, the door closing time is shortened as compared with the conventional case where the pressure fluid is always decompressed and supplied when the door is closed, even if the door is caught. This shortened time has the effect of preventing departure delays at train stations, and can be applied to vehicles on overcrowded routes in urban areas to prevent delays in vehicle operation.

According to the invention described in claims 6 and 7, the same effect as that of the invention described in claims 1 and 2 can be obtained. According to the invention described in claim 8, when the door-jamming state occurs, the door-closing force decreasing state is maintained during the period from the reduction of the door-driving force to the cancellation of the door-clapping state. Rather than reducing the door closing force for a predetermined time with a margin only by using the timer, the door driving force reduction time for surely canceling the door pinching state which is the actual condition for eliminating the door pinching state at that time becomes. Therefore, it is possible to eliminate a useless door closing force reduction time, so that the train stop time can be shortened by that much and a train departure delay can be prevented. Further, it is possible to prevent the door closing force from returning to the normal state and tightening the passengers even though the door is still in the door-clamping state after the set time set by the conventional timer. According to the invention described in claim 9, the pressure fluid supplied to the door-closing machine is depressurized until the vehicle reaches a predetermined speed after the door-closing switch is turned on when the door is closed. Since it is possible to escape the object from the door-sandwich state, it is possible to escape from the door-sandwich when a small object whose door-closing switch is turned on is sandwiched. Therefore, when the door close switch is turned on, the vehicle can perform power running, so that it is possible to prevent an accident in which the vehicle is dragged in the state of the door being caught.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a graph showing a relationship between a normal door closing speed and a door pinch detection speed threshold value with respect to a door position in the embodiment.

FIG. 3 is a graph showing a change in the thrust of the door with respect to the passage of time when the door is closed from the fully closed position, for explaining the door pinching control state of the embodiment.

FIG. 4 is a flowchart for explaining the operation of the control unit of the embodiment.

FIG. 5 is a flowchart following FIG. 5 of the same embodiment.

FIG. 6 is a flowchart following FIG. 5 of the same embodiment.

7A is a schematic view of a main part showing a second embodiment of the present invention, and FIG. 7B is a schematic view of a main part showing a modified example of the second embodiment.

FIG. 8A is a schematic view of a main part showing a third embodiment of the present invention, and FIG. 8B is a schematic view of a main part showing a modified example of the third embodiment.

FIG. 9 is a circuit diagram showing an example of a control circuit of a conventional door fastening device.

[Explanation of symbols]

 11 Door Closing Device 12 Door Closing Machine 13 Door Closing Solenoid Valve 14 Door Closing Force Reducing Means 15 Pressure Fluid Source 16 Control Unit 20 Drive Cylinder 29 Right Door 30 Left Door 31 Right Pressure Chamber 32 Left Pressure Chamber 60 Door Driving Force Reduction Valve 61 Pressure adjustment valve 41 Rotary encoder

Claims (9)

[Claims] 1. A door closing apparatus for a vehicle door, wherein a door closing machine for opening and closing a door uses a double-acting fluid pressure cylinder, wherein the low-pressure side pressure chamber of the double-acting fluid pressure cylinder is in operation. A door driving force reducing means for increasing the internal pressure to reduce the door closing force is provided, and the door driving force reduction command is output based on the detection of the door jamming during the door closing process or the detection of the door fully closed to drive the door. A door closing device for a vehicle door, comprising a control unit for controlling the force reducing means. 2. A door closing apparatus for a vehicle, wherein a door closing machine for opening and closing a door uses a double-acting fluid pressure cylinder, wherein the low-pressure side pressure chamber of the double-acting fluid pressure cylinder is in operation. A door driving force reducing means for increasing the internal pressure to reduce the door opening / closing force is provided, and a door driving force reduction command is output based on the detection of door jamming during the door opening / closing stroke or the detection of the door being fully opened or fully closed. A door fastening device for a vehicle door, which is provided with a control unit for controlling the door driving force reducing means. 3. The door closing apparatus for a vehicle door according to claim 1, wherein the double-acting fluid pressure cylinder of the door closing machine applies pressure fluid from a pressure fluid source to a door closing solenoid valve. It is configured to open and close the door by being supplied and discharged via
The door driving force reducing means is constituted by a door driving force reducing valve that is an electromagnetic valve that switches a passage connected to the low pressure side pressure chamber from a discharge state to a state connected to the pressure fluid source in response to the door driving force reduction command. A door closing device for a vehicle door, which is characterized in that 4. The door closing apparatus for a vehicle door according to claim 1, wherein the double-acting fluid pressure cylinder of the door closing machine applies pressure fluid from a pressure fluid source to a door closing solenoid valve. It is configured to open and close the door by being supplied and discharged via
The door driving force reducing means is a door driving force reducing valve that is an electromagnetic valve that switches a passage connected to the low pressure side pressure chamber from a discharge state to a state connected to the pressure fluid source in response to the door driving force reducing command, and A door fastening device for a vehicle door, comprising a door driving force reduction valve and a pressure adjusting valve provided between the pressure fluid source. 5. The door closing device for a vehicle door according to claim 1 or 2, wherein the double-acting fluid pressure cylinder of the door closing machine corresponds to each of the pressure chambers, and a direction switching electromagnetic valve is provided. A valve is provided, and the door is opened and closed by switchingly connecting the pressure chamber to the pressure fluid source side and the discharge side via the direction switching electromagnetic valve, and the door driving force reducing means is configured to open and close the door. A door door fastening device for a vehicle, characterized in that the direction switching solenoid valve is switched by a reduction command to switch the pressure chamber connected to the discharge side to a state connected to the pressure fluid source. 6. A door closing apparatus for a vehicle, wherein a door closing machine for opening and closing a door uses a double-acting fluid pressure cylinder, wherein the high-pressure side pressure chamber of the double-acting fluid pressure cylinder is in operation. A door driving force reducing means for reducing the internal pressure to reduce the door driving force is provided, and the door driving force reduction command is output based on the detection of the door pinching during the door closing process or the detection of the door fully closed. A double acting fluid pressure cylinder of the door-closing machine is provided with a control unit for controlling the force reducing means, and the pressure chambers are connected to the pressure fluid source side via directional switching solenoid valves provided corresponding to the respective pressure chambers. A state in which the door driving force reduction means switches the direction switching solenoid valve in response to the door driving force reduction command and is connected to the pressure fluid source side. Switching the pressure chamber in the state of being connected to the discharge side A door locking device for a vehicle door, which is characterized in that 7. A door closing apparatus for a vehicle, wherein a door-closing machine for opening and closing a door uses a double-acting fluid pressure cylinder, wherein a high-pressure side pressure chamber of the double-acting fluid pressure cylinder is in operation. A door driving force reducing means for reducing the inner pressure to reduce the door driving force is provided, and the door driving force reduction command is output based on the detection of the door pinching during the door opening and closing process or the detection of the door being fully opened or fully closed. A control unit for controlling the door driving force reducing means is provided, and the double-acting fluid pressure cylinder of the door closing machine causes the pressure chambers to be pressure fluid through the direction switching solenoid valves provided corresponding to the respective pressure chambers. The door is opened and closed by being switched and connected to the source side and the discharge side, and the door driving force reducing means switches the direction switching solenoid valve in response to the door driving force reducing command and connects to the pressure fluid source side. The pressure chamber in the closed state was connected to the discharge side. A door fastening device for a vehicle door, which is configured to switch to a state. 8. The door fastening device for a vehicle door according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7, wherein the control unit comprises: Based on the detection of door jamming, a door driving force decrease command is output so that the door driving force decrease state is maintained at least during the reverse operation period when the door is being pushed against the door driving force. A door fastening device for a vehicle door, which is configured to control the door driving force reducing means. 9. The door tightening device for a vehicle door according to claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7, or claim 8, wherein: The control unit
A door close switch that detects when the door has reached the fully closed position,
A full-closed detection control unit that outputs a door driving force reduction command to the door driving force reduction means during a period from when the detection signal from the door closing switch is input until the vehicle reaches a predetermined speed, Door locking device for vehicles.