JPH0681538A - Car door closing system - Google Patents

Abstract

PURPOSE:To shorten a span of time of up to being fully closed since door- bitingness has occurred by lowering the extent of pressure in a fluid out of a driving pressure source so as to reduce the driving force of a door after detecting such a state only at a time when a man or article is pinched in the door, and when nothing is caught in the door, feeding a door driving part with a pressure fluid at usual high pressure. CONSTITUTION:When door-bitingness is detected, a selector signal is outputted out of a decompressive command output part 26. This selector signal is given to a selector solenoid valve 4, and a pressure air supply source 10 is connected to a driving cylinder 12 via a pipeline 30 and a pressure reducing value 3. Air pressure to be fed to this driving cylinder 12 is decompressed, whereby force acting on a door is reduced to some extnet. After the elapse of the specified time so far set to a timer 25, output of the selector signal is stopped and the solenoid valve 4 is selected to its origonal state, thereby turning to a supply state of high pressure air.

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 of detecting a person or an object being caught during the closing operation of a vehicle door and weakening the force for closing the door.

[0002]

2. Description of the Related Art As a conventional technique, the Japanese Utility Model Publication 57-45
There is a No. 330. 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.

[0003]

This is because the pressure of the fluid driving cylinder for driving the door is normally 5 kg / cm when the door is closed.
^The door closing force becomes weak because the pressure is reduced to 2.5 kg / cm ² which is half of ^2. 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 the entire door is closed. It took time to reach the closed position, which was a cause of delay in vehicle operation.

[0004]

DISCLOSURE OF THE INVENTION The present invention is directed to a drive control section for controlling a drive cylinder by supplying and discharging a pressure fluid to open and close the door, and a door sandwiched state by a pulse from an encoder provided in the drive cylinder. A door-closing device for a vehicle door having a door-pinching detection control section for detecting, in the middle of a pipeline between a pressure fluid source of the drive control section and a drive cylinder,
A branch pipeline having a pressure reducing valve is provided in parallel with this pipeline, and a switching solenoid valve for selecting the pipeline and the branch pipeline and connecting to the drive cylinder is provided. Decompression by comparing the speed detection means for detecting the moving speed of the door by the pulse from the encoder with the speed data from the speed detection means and the setting data from the speed setting part in which the threshold value at the time of pinching the door is set. A speed comparison unit that outputs a command signal, and a pressure reduction command output unit that outputs a switching signal to the switching solenoid valve to connect the branch pipe line to a drive cylinder based on the pressure reduction command are provided. To do.

[0005]

[Function] Only when the door pinch detection control unit detects the door pinch state, the drive cylinder is connected to the branch pipe line provided with the pressure reducing valve, and the drive force of the drive cylinder is reduced at that time. It enables people and objects to escape from the trapped state. Until the door-clamping state is detected, the drive cylinder is supplied with the pressure fluid that generates a normal door closing force, so that the door closing speed is secured to some extent even when a full passenger comes into contact with the door.

[0006]

FIG. 1 shows an embodiment of the present invention. This door tightening device is provided with a door pinch detection control unit 2, a pressure reducing valve 3, a switching solenoid valve 4 and the like in association with a drive control unit 1 for opening and closing the door.

The drive control unit 1 controls the drive cylinder 12 by supplying and discharging the pressure fluid from the pressure fluid source 10 to control the door 13.
Open and close. That is, the pressure fluid source 10 to the pipeline 14
The pressure fluid supplied via the
The door 13 is opened and closed by switching and supplying by. Switching of the opening / closing direction switching valve 15 is performed by applying an electric signal to the solenoid valve 16 which turns on / off the pilot pressure of the switching portion.

The door pinch detection control section 2 includes a drive cylinder 12
By the pulse from the encoder 17 provided in the door 13
Of the door, that is, a state in which a person or an object is caught in the door 13 is detected, and when the door is caught, a switching signal is given to the switching solenoid valve 4 described later. .

As shown in the figure, the structure of the door jamming detection control unit 2 includes a position detecting unit 18, a door jamming detection setting unit 19, a speed detecting unit 21, a speed setting unit 22, a speed comparing unit 24, a timer 25, and a decompression command. The output unit 26 and the like are included. The position detection means 18 detects the moving position of the door 13 based on the pulse from the encoder. The door pinch detection setting unit 19
A door opening command signal, a door closing switch signal, and a pressure reduction mode signal (a mode signal for selecting whether or not to detect the door pinch) are input to determine whether the door pinch detection state or not. The door pinch detection setting unit 19 sets a door pinch detection region, and a dead region in which door pinch detection is not performed until the door 13 is closed to a certain extent (for example, an opening width larger than the width of a person). A knob 20A for setting is set. Further, when the door is inverted, there is an inversion insensitive area in which the door pinch detection is not performed in order to prevent erroneous operation from the inversion position until the door closing speed reaches a certain level or more, and in this embodiment, it is set to 3 mm. ing. This door pinch detection setting unit 1
Reference numeral 9 determines based on a signal from the position detection means 18 whether or not the door 13 is located in the door pinch dead area, and when the door pinch is detected and the door 13 is not in the door pinch dead area, the door pinch detection area. Is output to the speed comparison unit 24. The speed comparing unit 24 sets the moving speed of the door 13 from the speed detecting unit 21 and the threshold setting knob 23 in the speed setting unit 22 as the door-pinching detection speed threshold value only when the door-pinching ON signal is input. The pressure reduction command signal is output based on the result of comparison with the reference speed.

The pressure reducing valve 3 is provided in a branch pipeline 30 provided in parallel with the pipeline 14. And the switching solenoid valve 4
Selects either the pipeline 14 or the branch pipeline 30 having the pressure reducing valve 3 and drives the drive cylinder 2 via the drive controller 1.
It is provided to connect to. The switching solenoid valve 4 is switched so as to connect the branch conduit 30 to the drive cylinder 2 by the pressure reduction command signal output from the door pinch detection control unit 2.

The door fastening device having the above-mentioned structure is provided with the door 13
When a door pinch is detected in the closing stroke of step 1, the air pressure from the pressure fluid source 10 is, for example, from 5 kg / cm ² to 1.
Lower to 5-2 kg / cm ² . This allows a person or object to escape from the trapped state.

A description will be added to the determination of the state of being pinched.
First, the speed detecting means 21 detects the moving speed of the door 13 from the pulse signal from the encoder 17, and the speed comparing unit 24
Then, this moving speed is compared with the reference speed set in the speed setting unit 22 by the threshold value setting knob 23, the moving speed is slower than the reference speed, and the door pinch detection setting unit 1
When the door pinch-on signal indicating the door pinch detection area is output from 9, the door pinch state is detected and the pressure reduction command signal is output. The reference speed V1 is a door pinch detection speed threshold value shown by a dotted line in FIGS. 2 and 3, and is set to a value close to a stopped state. A curve Vc in FIG. 2 indicates the moving speed of the door 13 in the door closing direction which is not in the door-closed state, and a curve Vcx in FIG. Shows the moving speed in the closing direction from the reverse position. In any case, there is a speed V1 or less at the acceleration position at the beginning of closing,
In order not to detect this as a door-trapped state, when the speed starts from 0, the dead zone is set until the door moves 3 mm.

Further, the interval from the fully opened position of the door to the closed position thereof by the knob 20A is set as a dead region. This occurs when the door is closed and the remaining opening width is less than or equal to the size of the person after the door is closed. 2 is provided as a dead zone (variable) as shown in FIG. 2 and FIG.

Further, when the door reaches the fully closed position, the speed becomes 0 and it is detected as a door pinching state. Therefore, in order to eliminate this, the stroke after the door closing switch is turned on is set as a dead zone.

When the door pinching state is detected outside such a dead zone, the pressure reduction command output section 26 outputs a switching signal. This switching signal is given to the switching solenoid valve 4,
The switching solenoid valve 4 is switched from the state shown in FIG. 1 to connect the pressure air source 10 to the drive cylinder 12 via the conduit 30 and the pressure reducing valve 3 thereof. Air pressure supplied to the driving cylinder 12 is depressurized from 5 kg / cm ² to 1.5~2.0kg / cm ^2, 15~20kg force acting on the door, for example from 51kgf
fall to f. This value is a size that allows a person to get out when the person is in a state of being trapped. This switching solenoid valve 4
The time to switch is set time (1) knob 20B
Set by. This is the time required for a person to escape when the door-jammed state occurs, and the timer 25 is set by the set time (1) knob 20B. When the switching solenoid valve 4 is switched back to the original state, the door pinch detection is not performed for a predetermined time thereafter. This is to determine whether a person or an object in the door-jammed state has escaped.After that time, the door-jamming detection is restarted, and if the moving speed of the door is higher than the reference speed, the door is fully closed and the door is closed. If the moving speed is less than the reference speed, the switching signal is output again because the state of the door pinching continues. This time is the set time (2) knob 2
It is set in the timer 25 by 0C and is the escape confirmation time.

FIG. 4 is a flow chart showing the operation of the door pinch detection control section 2 of the door tightening device more specifically. To explain this, when the power is turned on in step 31, the closed position is detected in step 32, the initial setting is performed in step 33, that is, the set value is read, and in step 34, whether the door 13 is an open stroke or a closed stroke. If it is the opening stroke, the process proceeds to step 35, and if it is the closing stroke, the step 3
Go to 6. The process returns from step 35 to step 34. In step 36, since the door 13 is in the closing stroke, the result of the determination in steps 37 to 41 below is that the door close switch is not on, the pressure can be reduced, the door movement position is outside the dead zone, and the door speed is As a result of the determination that is smaller than the threshold value, it is determined that the door is in the state of being caught in the door, and the process proceeds to step 42 to start outputting the switching signal. The switching signal causes the switching solenoid valve 4 to switch to the reduced pressure air supply state to the drive cylinder 12 described above, and the switching signal continues until a certain time set in the timer 25 in step 43, that is, the escape required time has elapsed. The output of the switching signal is stopped, the solenoid valve 4 is switched to the original state, and the high pressure air is supplied. When the output of the switching signal is stopped, the process proceeds to step 45, and when a certain time set in the timer 25, that is, the escape confirmation time elapses, the process returns to step 34 to enter the state of detecting the door-jamming state, When the state is detected, the same process as above is followed.

[0017]

The device of the present invention detects the trapping of a person or thing between doors and reduces the driving force of the door to reduce the pressure of the fluid from the driving pressure source so that the door is closed. Since it is supplied to the drive unit, and when a person or an object is not sandwiched by the door, it is supplied to the door drive unit at a normal high pressure,
Compared with the conventional one in which the driving fluid pressure is constantly reduced and supplied when the door is closed, the time from the occurrence of the door pinching state to the full closing is shortened. The reduction in time has the effect of shortening the stop time of the vehicle at the station. Therefore, it is extremely effective when applied to vehicles on overcrowded routes in urban areas.

[Brief description of drawings]

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

FIG. 2 is a graph showing the relationship between the door speed from the fully opened position to the front closed position of the door in the embodiment and the threshold value of the door pinch detection speed.

FIG. 3 is a graph showing a relationship between a door speed from a state in which the door starts moving from an intermediate position to a front closed position and a door pinch detection speed threshold value in the embodiment.

FIG. 4 is a flow chart for explaining the operation of the door jam detection control unit of the same embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive control unit 2 Door jam detection control unit 3 Pressure reducing valve 4 Switching solenoid valve 10 Fluid pressure source 12 Door drive cylinder 13 Door 14 Pipeline 17 Encoder 19 Speed setting unit 21 Speed detecting unit 22 Speed setting unit 24 Speed comparison unit 26 Pressure reduction Command output unit 30 Branch line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Makoto Seki, Makoto Seki, 1-6-5 Marunouchi, Chiyoda-ku, Tokyo Within East Japan Railway Company (72) Yoshiyuki Oiwa, 6-1, Nakamichi, Tarumi-ku, Kobe-shi, Hyogo No. 35 (72) Inventor Kenji Kawado 1-8-13 Higashiooike, Kita-ku, Kobe-shi, Hyogo

Claims (1)

[Claims] 1. A drive control unit for controlling a drive cylinder by opening and closing a door by supplying and discharging a pressure fluid, and a door pinch detection control unit for detecting a door pinch state by a pulse from an encoder provided in the drive cylinder. And a branch pipeline having a pressure reducing valve in parallel with the pipeline between the pressure fluid source of the drive control unit and the drive cylinder. At the same time, a switching solenoid valve for selecting the pipe line and the branch pipe line and connecting to the drive cylinder is provided, and the door pinch detection control unit detects the moving speed of the door by the pulse from the encoder. When,
A speed comparison unit that outputs a pressure reduction command signal by comparing the speed data from the speed detection unit with the setting data from the speed setting unit that sets the threshold value when the door is caught, and based on this pressure reduction command, A pressure reduction command output unit for outputting a switching signal to the switching solenoid valve so as to connect the branch line to the drive cylinder,
A door fastening device for a vehicle, characterized by being provided with.