JP2000095105A - Device for detecting catching in door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for detecting catching in car doors that can, over the long term, accurately detect whether or not anything is trapped in a car door, even when the rubber trim around the door has lost elasticity and hardened. SOLUTION: When the CPU receives a 'teaching start signal,' it records the differential pressures between the air pressure in the hollow part of the door contact and the air pressure inside the fitting during motion between the closed and open positions of the doors as reference values P0 (S24, 25). When the 'measurement start signal' is received, the differential pressure between the air pressure inside the hollow part of the door contact when the car door is closed and the air pressure inside the hollow part of the fitting is detected as a detected value p (S27). Based on the difference between the detected value P and the reference values P0, it is judged whether or not there is anything caught in the door (S28, S29). Even if the rubber trim around the edge of the door loses elasticity and hardens, no influence is made on the difference between the reference values P0 or the detected value P, enabling accurate detection of, over the long term, whether or not anything is caught in a car door is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects whether a vehicle door is in a pinched state when the vehicle door is closed, based on the displacement of an elastic hollow tube formed in the rubber of the door tip of the vehicle door. The present invention relates to a device for detecting a door jam.

[0002]

In vehicles such as trains and buses, in order to ensure the safety of passengers, when a vehicle door is closed, a part of the body or belongings is trapped. A door pinch detection device for detecting is provided. This door pinch detection device is provided with, for example, a door tip rubber at a tip end portion of a vehicle door, and detects a pressed state of the door tip rubber when the vehicle door is closed to determine whether or not the door is pinched. It is to detect whether or not. That is, the door pinch detection device is configured such that when a part of the body or belongings is pinched when the vehicle door is closed, the door rubber is pressed in an unusual state. By detecting a change in the pressed state, it is possible to detect a pinched state of the door.

In this case, as a specific configuration for detecting the pressed state of the door rubber, for example, an elastic hollow tube which can be elastically deformed by an external force is provided on the door rubber and both ends of the elastic hollow tube are provided. A light emitting element and a light receiving element are provided facing each other,
A sensor that detects based on the change in the amount of light received by the light receiving element, or a pressure sensor that seals the inside of the elastic hollow tube and detects the pressure in the elastic hollow tube is provided. There is one that detects based on such information.

However, in such a construction in which an elastic hollow tube is provided in the door rubber, the elasticity of the door rubber, that is, the elastic hollow tube is reduced due to aging due to continuous use. There is a problem of curing. In that case, even if the same object is in the state of being pinched, even in the initial state, it can be detected that it is in the state of being pinched,
In a state where the elastic force is reduced and the resin is hardened, there is a problem that it is not possible to detect the state of pinching the door.

Further, there is a fear that the elastic hollow tube may not return to the original state while being elastically deformed.
For example, there is a problem that the operation of the vehicle is delayed or the vehicle diagram is confused because the start of the vehicle is prohibited.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to close a vehicle door even when the elasticity of a door tip rubber is reduced and hardened. Provide a door-jam detection device that can accurately detect whether or not a door-jam is in place for a long time, thereby ensuring the safety of passengers and improving reliability. Is to do.

[0007]

According to the present invention, there is provided a door jam detecting device having a structure in which a door of a vehicle body is opened and closed in response to a vehicle door reciprocating between a door closing position and a door opening position. It is used to detect whether or not the vehicle door is in a pinched state when the vehicle door is closed based on a displacement amount of an elastic hollow tube provided in a door rubber of the vehicle door, Each time the vehicle door performs a door closing operation that moves from the door opening position to the door closing position, a displacement amount of the elastic hollow tube is detected at a time point before the door closing operation is started. Each time the vehicle door performs the door closing operation, the displacement amount of the elastic hollow tube at the time when the vehicle door is located at the door closing position is detected. Detecting means for detecting as a value, and Based on comparing the out reference value and the detected value has a characteristic where constructed and a determination means for determining whether said door pinch state (claim 1).

[0008] According to such a configuration, when executing the door closing operation in which the vehicle door is moved from the door opening position to the door closing position, the detecting means is provided before the door closing operation is started. The displacement amount of the elastic hollow tube at the time is detected and stored as a reference value, and the displacement amount of the elastic hollow tube at the time when the vehicle door is located at the door closing position is detected as a detection value. Then, the determination means determines whether or not the vehicle is in the door-jam state based on comparing the reference value and the detected value.

As described above, the displacement amount of the elastic hollow tube before the vehicle door starts the door closing operation is stored as the reference value, and the vehicle door executes the door closing operation to close the door. Since the displacement amount of the elastic hollow tube at the time of being located at the position is detected as a detection value, and the reference value and the detection value are compared to determine whether or not the door is in a pinched state, Even if the elasticity of the door rubber has been reduced and hardened, the comparison value obtained by comparing the reference value and the detected value is not affected by the hardening of the door rubber at all. By this, it is possible to accurately detect whether or not it is in the state of being pinched for a long time,
The safety of passengers can be reliably ensured, and reliability can be improved.

[0010] In the door pinch detection device having the above-described configuration, the detection means may include the elastic hollow when the vehicle door is performing a door opening operation of moving from the door closing position to the door opening position. A configuration may be such that the displacement of the tube is stored as the reference value.

[0011] According to such a configuration, the detecting means stores the displacement amount of the elastic hollow tube as a reference value when the vehicle door is performing the door opening operation of moving from the door closing position to the door opening position. I do.

As described above, since the displacement amount of the elastic hollow tube when the vehicle door is performing the door opening operation is stored as the reference value, the detection accuracy can be improved and the reliability can be improved. Sex can be further enhanced. That is, when the reference value is the displacement amount of the elastic hollow tube at the time when the vehicle door is located at the door closing position by the previous door closing operation, the minimum detection target position that can be detected at that time is assumed. If the object to be sandwiched is smaller than the object, that amount will be included as an error in the reference value. Thus, the displacement amount of the elastic hollow tube during the execution of the door opening operation as described above. Is set as the reference value, it is possible to eliminate an error caused by an object smaller than the minimum detection object.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a train will be described below with reference to the drawings. ◎ First, Figure 2
In the vehicle 1, a vehicle door 3 is provided on a vehicle body 2 of the vehicle. The entrance 4 of the vehicle body 2 is opened and closed in response to the vehicle door 3 reciprocating in the directions of arrows A1 and A2 in FIG.

The door jam detector 5 includes a controller 6, a terminal 7, and a unit 8. The controller 6 is mounted below the floor of the vehicle body 2, and the terminal 7 is mounted above the entrance 4 of the vehicle. The unit 8 is mounted on the upper part of the vehicle door 3.
The controller 6 and the terminal 7 are connected to the cable 9, the nylon connectors 10, 11 and the cable 12
Connected through. In FIG. 2, the controller 6 and the terminal 7 corresponding to the vehicle door 3 on the left side in FIG.
And only the unit 8 and the like, and the controller, terminal, unit and the like corresponding to the vehicle door 3 on the right side are omitted in the figure.

Next, a specific configuration of the terminal 7 will be described with reference to FIGS. FIG.
Shows a plan view (a) and a front view (b) of the terminal 7, and FIG. 4 shows an exploded view of the terminal 7. The case 13 of the terminal 7 is formed by combining an iron main case 14a and a resin cover 14b. Inside the main case 14a, a capacitor, a resistor, an NPN transistor, etc. A cover 14b is bolted to a main case 14a by bolts 18 in a state where a printed wiring board 15 on which various electronic components are mounted and a coil 17 wound around a bobbin 16 are provided. .

The cable 12 is connected to a predetermined portion of the terminal 7, and the nylon connector 11 is provided at the tip of the cable 12 (see FIG. 2). In FIG. 4, the cable 12 is omitted. In this case, when electric power is supplied to the coil 17 and an electromagnetic field is generated from the coil 17, the electromagnetic field is transmitted to the space through the cover 14b because the main case 14a is made of iron and the cover 14b is made of resin. It is radiated.

Next, a specific configuration of the unit 8 will be described with reference to FIGS. FIG.
FIG. 6 shows a plan view (a), a front view (b), and a side view (c) of the unit 8, and FIG. 6 shows an exploded view of the unit 8. The case 19 of the unit 8 includes a mounting portion 20.
a is formed by combining an iron main case 20b integrally formed with a resin cover 20c. Inside the main case 20b, various components such as a capacitor, a resistor, and an NPN transistor are described in detail. Printed circuit board 21 on which electronic components are mounted is bolt 22
Is bolted through the nut 22a by
A pressure sensor 23 electrically connected to the printed wiring board 21 is screwed by a screw 24,
The cover 20c is bolted to the main case 20b with bolts 27 in a state where the coil 26 wound around 5 is provided.

The pressure sensor 23 is provided with nylon connectors 28 and 29 as two pressure ports.
The nylon connectors 28 and 29 are connected to the main case 2
0b. In this case, when power is supplied to the coil 26 and an electromagnetic field is generated from the coil 26, the electromagnetic field is transmitted to the space through the cover 20c because the main case 20b is made of iron and the cover 20c is made of resin. It is radiated.

FIG. 7 is a plan view (a), a front view (b) and a side view (c) of a state where the terminal 7 is mounted on the vehicle body 2 and a state where the unit 8 is mounted on the vehicle door 3. ). Iron plate 3 constituting body 2
0, two mounting plates 31 are fixedly mounted on the inner wall surface 30a by welding.
By being screwed to 1, it is attached and fixed to the inner wall surface 30a of the iron plate 30. The unit 8 is fixedly mounted on the upper part of the vehicle door 3 by screwing the mounting part 20a of the main case 20b to the upper part of the vehicle door 3. In this case, when the vehicle door 3 reciprocates in the directions of arrows A1 and A2 in FIG.
Are reciprocated along the longitudinal direction of the terminal 7.

When the vehicle door 3 is in the door-closing position that closes the entrance 4, that is, in the state shown in FIG. 2, the terminal 7 and the unit 8 are connected to each other as shown in FIG.
As shown in the middle (a), the coil 17 is disposed in a facing relationship, that is, the coil 17 disposed in the terminal 7 and the coil 26 disposed in the unit 8 are opposed to each other. On the other hand, when the vehicle door 3 is at the door opening position where the entrance 4 is opened, the terminal 7 and the unit 8
Means that the coils 17 and 26 do not face each other as shown in FIG. 8B.

FIG. 9 shows the structure of a main part of the vehicle door 3. At the front end (door tip) of the vehicle door 3, a door rubber 32 is provided over substantially the entire upper end to lower end of the vehicle door 3. As shown in FIG. 10, the door tip rubber 32 integrally has a door stop portion 33 having a substantially semicircular cross section and a mounting portion 34 having a substantially rectangular cross section. The mounting portion 34 is inserted and fixed in a concave portion formed at the front end portion of the vehicle door 3, whereby the door rubber 3
2 is fixed to the tip of the vehicle door 3. In addition, the door stop 33 protrudes from the end surface of the vehicle door 3,
Thereby, when the vehicle door 3 is closed, that is, when the vehicle door 3 collides with the vehicle door 3 that is paired with the vehicle door 3, an impact is reduced.

In FIG. 10, a first connecting portion 33a is integrally formed on the inner bottom wall of the door stop portion 33 and on the vehicle inner side, and is formed on the inner peripheral wall of the door stop portion 33 on the vehicle inner side. Is integrally formed with a second connecting portion 33b. A cylindrical portion 33c is integrally formed at the tip of each of the first connecting portion 33a and the second connecting portion 33b. The inside of the cylindrical portion 33c extends from the upper end to the lower end of the door rubber 32. The hollow portion 33d (the elastic hollow tube according to the present invention) penetrates through. Further, a regulating wall portion 33e is integrally formed on the inner bottom wall of the door stop portion 33 and outside the vehicle.

The upper end of the hollow portion 33d of the door stop 33 is
One end of the “L” -shaped silicon tube connecting tube 35 is inserted and closed, and the lower end of the hollow portion 33 d is double closed by closing members 36 and 37.
Thereby, the air in the hollow portion 33d is sealed.
The other end of the silicon tube connecting pipe 35 is connected to a nylon connector 28 as one pressure port of the pressure sensor 23 disposed in the unit 8 via a silicon tube 38, whereby the pressure is reduced. Sensor 2
3 is the pressure of the air in the hollow part 33d of the door stop part 33,
Silicon tube connecting pipe 35 and silicon tube 3
8 so that it can be detected.

On the other hand, the mounting portion 34 has a hollow portion 34a penetrating from the upper end to the lower end of the door rubber 32. The upper end of the hollow portion 34a of the mounting portion 34 is
One end of the “L” -shaped silicon tube connecting tube 39 is inserted and closed, and the lower end of the hollow portion 34 a is double closed by closing members 40 and 41.
Thereby, the air in the hollow portion 34a is sealed.
The other end of the silicon tube connecting pipe 39 is connected to the nylon connector 29 as the other pressure port of the pressure sensor 23 via the silicon tube 42, whereby the pressure sensor 23 The pressure in the air in the hollow portion 34a is increased by the silicon tube connecting pipe 3.
9 and the silicon tube 42.

Further, a core rubber 43 is provided above the door rubber 32, and a core rubber 44 (see FIG. 10) is provided below the door rubber 32. The core rubbers 43 and 44 function as reinforcing members for the door stop portion 33 of the door rubber 32.

In the thus configured door rubber 32, when a force to the outside of the vehicle acts on the door stop portion 33, the door stop portion 33 is elastically deformed, and the cylindrical portion 33c is connected to the second connecting portion 33b. However, at this time, since the movement is regulated by the regulating wall portion 33e, the cylindrical portion 33c is crushed, that is, the pressure of the air in the hollow portion 33d is reduced. Changes greatly. On the other hand, when a force to the vehicle interior acts on the door stop portion 33, the cylindrical portion 33c is pulled to the vehicle interior via the second connecting portion 33b, but at this time, since the movement is not restricted, The cylindrical portion 33c is not crushed, that is, the pressure of the air in the hollow portion 33d does not significantly change.

Even when a force acting on the door stop 33 is applied to the outside of the vehicle or a force acting on the inside of the vehicle, the mounting portion 34 is, as described above, Since it is inserted and fixed in the recess of the vehicle door 3, it is not elastically deformed, that is, the pressure of the air in the hollow portion 34a does not change.

In the door rubber 32, the core rubbers 43, 4
In the section in which the door stop portion 4 is provided, the door stop portion 33 is not affected even when a force to the outside of the vehicle acts on the door stop portion 33 or even when a force to the inside of the vehicle acts on the door stop portion 33. It is not elastically deformed, and it is possible to detect whether or not a section other than this section, that is, a section in which the door rubber 32 is not provided with the core rubbers 43 and 44 is in a door sandwiching state which will be described in detail later. It is a section that is.

Next, the controller 6 and the terminal 7
The electrical configuration of the unit 8 will be described with reference to FIG. First, the controller 6 controls the vehicle body 2
Power is supplied from a power supply device 45 disposed at a predetermined position. The input circuit 46 receives the “door open signal” in response to the conductor performing the door open operation,
A "door opening signal" is output to the CPU 47, and when a "door closing signal" is given in response to the conductor performing a door closing operation, the "door closing signal" is output to the CPU 47.

The output circuit 48 receives the "door entrapment detection signal" from the CPU 47 indicating that the door is entrapped, and outputs the "door entrapment detection signal" to, for example, an output means (L
ED). When receiving the demodulated data from the demodulation circuit 50 of the terminal 7, the filter circuit 49 removes a noise component from the demodulated data and converts the demodulated data from which the noise component has been removed to the oscillation frequency output from the oscillation circuit 51 of the terminal 7. Synchronously CPU4
7 is output.

The CPU 47 is constituted by a microcomputer, and executes a stored program to execute processing described later in detail.

The terminal 7 is supplied with power from a power supply device 45 in the same manner as the controller 6. The oscillating circuit 51 generates power at a predetermined oscillating frequency and outputs the given power to the frequency dividing circuit 52. The frequency dividing circuit 52 includes an oscillation circuit 51
When power is supplied from the power supply, the supplied power is frequency-divided and the frequency-divided power is output to the booster 53.

When the divided power is supplied from the frequency dividing circuit 52, the booster 53 amplifies the power, and supplies the amplified power to a series resonance circuit 55 in which a capacitor 54 and the coil 17 are connected in series. Output. The series resonance circuit 55 generates an electromagnetic field by the coil 17 when the amplified power is supplied from the booster 53. Note that the other of the series resonance circuit 55 is
It is grounded via a resistor 56.

When a base current is supplied from the CPU 47 of the controller 6 via the buffer 58 to the NPN transistor 57, the NPN transistor 57 is turned on, and a part of the electric power charged in the capacitor 54 of the series resonance circuit 55 is transferred to the resistor 59.
, So that the power supplied to the coil 17 of the series resonance circuit 55 is reduced.

With such a configuration, the CPU 47 of the controller 6 controls on / off of the base current supplied to the NPN transistor 57,
By controlling the power supplied to the coil 17 of No. 5, the level of electromagnetic induction coupling can be controlled. For example, a state where the level is larger than a predetermined level corresponds to data “1”, and By associating a state smaller than the level with data "0", a signal pattern composed of the data "1" and "0" can be transmitted by electromagnetic induction coupling. That is, the CPU 47 of the controller 6, the NPN transistor 57 of the terminal 7, and the series resonance circuit 55 constitute a signal pattern generating means 60 for transmitting a signal pattern composed of data "1" and "0" by electromagnetic induction coupling. I have.

The demodulation circuit 50 demodulates the received data received by the coil 17 of the series resonance circuit 55 to generate demodulated data at the time of electromagnetic induction coupling, and outputs the demodulated data to the filter circuit 49 of the controller 6. It is supposed to.

In the unit 8, a parallel resonance circuit 62 in which the coil 26 and the capacitor 61 are connected in parallel.
Is connected to the series resonance circuit 55 of the terminal 7 by electromagnetic induction coupling, and charges the capacitor 61 with AC power generated by the coil 26 at the time of electromagnetic induction coupling.

The full-wave rectifier circuit 63 rectifies the AC power charged in the capacitor 61 to generate DC power, and outputs the DC power to the constant voltage circuit 64. When DC power is supplied from the full-wave rectifier circuit 61, the constant voltage circuit 64 converts the supplied DC power to a constant voltage,
The power converted to the constant voltage is output to the CPU 65.

The clock extraction circuit 66 includes the parallel resonance circuit 6
A clock signal synchronized with the AC power charged in the second capacitor 61 is generated, and the clock signal is output to the AND circuit 67. Further, the demodulation circuit 68 generates demodulated data by demodulating the received data received by the coil 26 of the parallel resonance circuit 62 at the time of electromagnetic inductive coupling,
The demodulated data is output to the CPU 65.

The NPN transistor 69 is connected to the CPU 65
When the base current is supplied from the AND circuit 67 through the above-described AND circuit 67, the transistor is turned on, and a part of the electric power charged in the capacitor 61 of the parallel resonance circuit 62 is changed to the collector current through the resistor 70. The power supplied to the coil 26 of the resonance circuit 62 is reduced.

With such a configuration, the CPU
65 controls the base current supplied to the NPN transistor 69 on and off, and controls the power supplied to the coil 26 of the parallel resonance circuit 62, thereby controlling the level of electromagnetic induction coupling. Are associated with the data “1” while the state where the level is smaller than the predetermined level is associated with data “0”.
A signal pattern consisting of "0" can be transmitted by electromagnetic induction coupling. That is, the CPU 65, the NPN transistor 69, and the parallel resonance circuit 62 constitute a signal pattern generation unit 71 for transmitting a signal pattern including data "1" and "0" by electromagnetic induction coupling.

As described above, the pressure sensor 23 is provided with two nylon connectors 28 and 29 as pressure ports. In addition to detecting the pressure, the pressure of the air in the hollow portion 34a of the mounting portion 34 is detected, and the detection results are output to the CPU 65.

The variable resistor 72 is provided as sensitivity adjusting means, and will be described in detail later.
5 adopts a value set by the variable resistor 72 as a judgment value, and executes a predetermined process.

The CPU 65 corresponds to the determination means in the present invention, and is constituted by a microcomputer. By executing a stored program, the CPU 65 executes processing described later in detail. I have. The detecting means 73 according to the present invention is constituted by each electronic component in the unit 8 described above.

Next, the operation of the above configuration will be described with reference to FIGS. FIG. 12 shows the contents of processing executed by the CPU 47 of the controller 6, and FIG.
This shows the contents of the processing executed by the CPU 65 of the unit 8.

First, the CPU 47 of the controller 6
It is determined whether a "door open signal" has been input (step S
1). Here, when the conductor performs an operation to open the vehicle door 3, the CPU 47 of the controller 6 inputs a "door open signal".
S ", and waits for a predetermined time (step S2). Here, the predetermined time is a time from when the vehicle door 3 starts moving from the door closing position to the door opening position until a certain time elapses.
Is longer than the time required to move in the direction of the door opening position by the size of the minimum detectable object to be detected.

When the CPU 47 of the controller 6 detects that a predetermined time has elapsed, it supplies electric power to the series resonance circuit 55 of the terminal 7 to generate an electromagnetic field from the coil 17 of the series resonance circuit 55 (step S).
3). At this time, the vehicle door 3 is moving from the door closing position to the door opening position.

Now, in response to the generation of an electromagnetic field from the coil 17 of the series resonance circuit 55 in the terminal 7, the electromagnetic field is generated between the coil 17 of the series resonance circuit 55 and the coil 26 of the parallel resonance circuit 62 in the unit 8. When the inductive coupling is established, AC power is induced in the coil 26, the AC power is rectified by the full-wave rectifier circuit 63 to generate DC power, and the DC power is converted to a constant voltage by the constant voltage circuit 64. And is given to the CPU 65 of the unit 8.

The CPU 65 of the unit 8 includes a constant voltage circuit 6
When a constant voltage equal to or higher than a predetermined level is given from 4, that is, when the power supply voltage becomes OK, "YES" is determined in step S21, and a "wake-up signal" is transmitted by electromagnetic induction coupling (step S22). At this time, as described above, the CPU 65 of the unit 8
By controlling the base current supplied to the N-type transistor 69 on and off, a signal pattern including data “1” and “0” is generated, which is referred to as a “wake-up signal”.
As a transmission.

Next, the "wake-up signal" transmitted from the unit 8 is received by the terminal 7 as reception data by electromagnetic induction coupling, the reception data is subjected to demodulation processing, and the demodulation data is provided to the CPU 47 of the controller 6. The CPU 47 of the controller 6 determines in step S
In step S4, "YES" is determined, and a "teaching start signal" is transmitted by electromagnetic induction coupling (step S4).
5). At this time, as described above, the CPU 47 of the controller 6 generates a signal pattern including data “1” and “0” by controlling on / off of the base current supplied to the NPN transistor 57 and outputs the signal pattern as “teaching”. As a “start signal”.

Next, the “teaching start signal” transmitted from the terminal 7 is transmitted to the unit 8 by electromagnetic induction coupling.
When the received data is demodulated and given to the CPU 65 of the unit 8, the CPU 65 of the unit 8 determines “YES” in step S 23, and , The air pressure in the hollow portion 33d of the door stop portion 33 and the air pressure in the hollow portion 34a of the mounting portion 34 are measured, and the differential pressure is detected as a detection value P (step S24). It is stored as the value P0 (step S25).
That is, the CPU 65 of the unit 8 determines the air pressure in the hollow portion 33d of the door stop portion 33 and the air pressure in the hollow portion 34a of the mounting portion 34 while the vehicle door 3 is moving from the door closing position to the door opening position. Is stored as the reference value P0.

Next, the CPU 47 of the controller 6
It is determined whether a "door closing signal" has been input (step S
6). Here, when the conductor performs an operation of closing the vehicle door 3, the CPU 47 of the controller 6 outputs a “door closing signal”.
Is entered, so that “Y” is entered in step S6.
ES ”and start the timer (step S
7). At this time, the vehicle door 3 moves from the door opening position to the door closing position.

Next, the “wake-up signal” transmitted from the unit 8 is received by the terminal 7 as reception data by electromagnetic induction coupling, the reception data is subjected to demodulation processing, and the demodulation data is provided to the CPU 47 of the controller 6. The CPU 47 of the controller 6 determines in step S
In step S8, "YES" is determined, and a "measurement start signal" is transmitted by electromagnetic induction coupling (step S9). At this time, the CPU 47 of the controller 6 generates a signal pattern including data “1” and “0” different from the above “teaching start signal” by controlling the base current supplied to the NPN transistor 57 on and off. Is transmitted as a “measurement start signal”.

Next, the "measurement start signal" transmitted from the terminal 7 is received by the unit 8 by electromagnetic induction coupling as received data, and the received data is demodulated.
When the demodulated data is given to the CPU 65 of the unit 8,
The CPU 65 of the unit 8 determines “YES” in step S26, and determines the air pressure in the hollow portion 33d of the door stop portion 33 of the
And the air pressure in the hollow portion 34a is measured, and the differential pressure is calculated as a detection value P (step S27). That is, the CPU 65 of the unit 8 detects the differential pressure between the air pressure in the hollow portion 33d of the door stop portion 33 and the air pressure in the hollow portion 34a of the mounting portion 34 when the vehicle door 3 is closed, by the detection value P. Detected as

Next, the CPU 65 of the unit 8 reads the resistance value of the variable resistor 72, calculates the read resistance value as a judgment value P1 (step S28), and calculates the difference between the reference value P0 and the detection value P described above. Is compared with the determination value P1 (step S29).

When the vehicle door 3 is not in the pinched state, the reference value P0, which is the value before the vehicle door 3 is moving, that is, the value before the vehicle door 3 is closed, and the value when the vehicle door 3 is closed. Is smaller than or equal to the determination value P1, the CPU 65 of the unit 8 determines in step S2
9, “NO” is determined, and a “detection off signal” is transmitted by electromagnetic induction coupling (step S30). At this time, the CPU 65 of the unit 8 generates a signal pattern including data “1” and “0” different from the “wakeup signal” by controlling on / off of the base current supplied to the NPN transistor 57. , And transmit it as a “detection off signal”.

Then, the "detection off signal" transmitted from the unit 8 is received by the terminal 7 by electromagnetic induction coupling, the received data is demodulated, and when the demodulated data is given to the CPU 47 of the controller 6, The CPU 47 determines “NO” in the step S10, determines “YES” in the step S11,
The output of the "door entrapment detection signal" is turned off, that is, the "door entrapment detection signal" is not output (Step S1).
2).

On the other hand, when the vehicle is in the door-jamming state, the difference between the reference value P0 and the detection value P exceeds the determination value P1, so that the CPU 65 of the unit 8 returns "YES" in step S29. Judge and transmit a “detection ON signal” by electromagnetic induction coupling (step S3)
1). At this time, the CPU 65 of the unit 8 controls on / off of the base current supplied to the NPN transistor 57, so that the data “1” and “0” different from the above “wake-up signal” and “detection off signal” are obtained. A signal pattern is generated and transmitted as a “detection ON signal”.

Then, the "detection ON signal" transmitted from the unit 8 is received by the terminal 7 by electromagnetic induction coupling, the received data is subjected to demodulation processing, and when the demodulated data is given to the CPU 47 of the controller 6, CPU 47 determines “YES” in step S10.
And turns on the output of the "door entrapment detection signal", that is, outputs the "door entrapment detection signal" to the output circuit 48 (Step S13).

Next, the CPU 47 of the controller 6
It is determined whether or not the timer has expired (step S14).
It is determined “NO” in 14 and the above-described step S1
Return to 0. On the other hand, when the time is up, "YES" is determined in the step S14, the supply of the electric power to the series resonance circuit 55 of the terminal 7 is stopped (step S15), and the process returns to the above-described step S1.

That is, while the power as the power supply voltage is held, the CPU 65 of the unit 8 repeatedly executes the above-described determination processing and transmits the “detection ON signal” or the “detection OFF signal” ( Steps S27 to S3
1) The CPU 47 of the controller 6 monitors whether a “detection on signal” or a “detection off signal” has been received until the timer expires (step S1).
0 to S13), when the timer expires, the monitoring is stopped and the supply of power to the series resonance circuit 55 of the terminal 7 is stopped (step S15).

As described above, according to the present embodiment, the unit 8
CPU 65 receives the "teaching start signal" and receives the air pressure and the air pressure in the hollow portion 33d of the door stop 33 while the vehicle door 3 is moving from the door closing position to the door opening position. The differential pressure from the air pressure in the hollow portion 34a of the portion 34 is stored as a reference value P0, and in response to receiving the "measurement start signal", the door stop portion 33 when the vehicle door 3 is closed is received. A differential pressure between the air pressure in the hollow portion 33d and the air pressure in the hollow portion 34a of the attachment portion 34 is detected as a detection value P, and whether or not the door is in the state of being pinched based on the difference between the reference value P0 and the detection value P is determined. Is determined, the difference between the reference value P0 and the detection value P is due to the hardening of the door rubber, even if the elasticity of the door rubber 32 is reduced and hardened. Without any effect, Tohasami whether or not the state can be accurately detected over long, it is possible to reliably ensure the safety of passengers, it is possible to improve the reliability.

Particularly, in this case, the CPU 6 of the unit 8
5 is the time during which the vehicle door 3 is moving from the door closing position to the door opening position, specifically, by the size of the minimum detection target object that the vehicle door 3 can detect. Since the differential pressure between the air pressure in the hollow portion 33d of the door stop portion 33 and the air pressure in the hollow portion 34a of the mounting portion 34 after moving toward the door opening position is set to the reference value P0, the minimum detectable value is obtained. It is possible to eliminate the error due to the object to be detected,
Detection accuracy can be improved, and reliability can be further improved.

The present invention is not limited to the above embodiment, but can be modified or expanded as follows. When detecting whether or not it is in the state of being pinched,
The method is not limited to the method of detecting a change in the air pressure in the door rubber, but may be a photoelectric method using a light emitting element and a light receiving element, or an ultrasonic method using an ultrasonic sensor.

By forming the hollow portion for detecting the detected pressure from the inside of the cylindrical portion, the hollow portion is not limited to the double structure of the inner peripheral wall of the door stop portion and the cylindrical portion. The inside of the inner peripheral wall may be a hollow portion for detecting the detection pressure, that is, may have a single-layer structure.

The terminal and the unit are not limited to two-way communication between them, but may be at least one-way communication in which a "detection ON signal" indicating that the terminal is in a door-to-door state is transmitted from the unit. Is also good.
The configuration is not limited to the configuration in which the supply of power is stopped when the vehicle door is at the door closing position, but may be a configuration in which power is always supplied.

The positional relationship between the terminal and the unit is
Electromagnetic induction only in a limited range of movement of the vehicle door by adopting a configuration in which the vehicle door faces when the door is in the door closing position and does not face when the vehicle door is in the door opening position. Not only in the configuration for establishing the connection, but also when the vehicle door is in the door-closed position, and also when the vehicle door is in the door-open position, the vehicle door is moved. A configuration in which electromagnetic induction coupling is established in the entire range of the range may be adopted.

The present invention is not limited to the configuration in which the controller and the terminal are separately provided, but may be a configuration in which the controller and the terminal are integrally provided. May be provided in a plurality), that is, a configuration for centralized control may be used.

[0069]

As is apparent from the above description, according to the door jam detecting device of the present invention, the displacement amount of the elastic hollow tube at the time before the vehicle door starts the door closing operation is determined. The displacement value of the elastic hollow tube at the time when the vehicle door is positioned at the door closing position by executing the door closing operation is detected as a detected value, and the reference value and the detected value are compared. Since it is configured to determine whether or not the door is in a pinched state, even when the elasticity of the door tip rubber is reduced and hardened, it can be obtained by comparing the reference value and the detected value. The comparative value is not affected by the hardening of the door rubber at all, whereby it is possible to accurately detect whether or not the door is in a pinching state for a long period of time, thereby ensuring the safety of passengers. Can increase the reliability .

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a flowchart showing processing contents of a CPU on a unit side.

FIG. 2 is a front view showing a main part of the vehicle.

FIG. 3 is a plan view (a) and a front view (b) of a terminal.

FIG. 4 is an exploded view of the terminal.

FIG. 5 is a plan view (a), front view (b), and side view (c) of the unit.

FIG. 6 is an exploded view of the unit.

FIG. 7 is a plan view (a), a front view (b), and a side view (c) showing a mounting state of a terminal and a unit.

FIG. 8 is a diagram showing a positional relationship between terminals and units.

FIG. 9 is a front view showing a main part of the vehicle door.

FIG. 10 is a sectional view of a door rubber.

FIG. 11 is a block diagram showing an electrical configuration.

FIG. 12 is a flowchart showing processing contents of a CPU on a controller side;

[Explanation of symbols]

In the drawings, 1 is a vehicle, 2 is a vehicle body, 3 is a vehicle door, 4 is a doorway, 5 is a door pinch detection device, 32 is a door tip rubber, 33a is a hollow portion (elastic hollow tube), 65 is a CPU ( Determination means), 7
3 is a detecting means.

Continuing from the front page (72) Inventor Kazuo Sagae Sankus Co., Ltd. 3-53-3 Akebonocho, Tachikawa-shi, Tokyo (72) Inventor Tsuneishi Tomita 3-5-2-3 Akebonocho 3-chome, Tachikawa-shi, Tokyo (72) Inventor Tomonori Imai 3-5-3, Akebonocho, Tachikawa-shi, Tokyo Inside Sunks Co., Ltd. (72) Inventor Hideyuki Kobayashi 3-53-3, Akebonocho, Tachikawa-shi, Tokyo Inside Sunks Co., Ltd. (72) Inventor Toshiro Toda 3-5-3 Akebonocho, Tachikawa-shi, Tokyo F-term in Sankus Co., Ltd. (reference) 2E052 AA09 BA02 BA07 EA15 EB01 EC03 GA00 GA02 GA05 GA06 GA07 GA09 GB06 GC01 GC07 HA01 KA01 KA08 KA10 KA12 KA13 KA17

Claims (2)

[Claims] 1. A vehicle having a structure in which a door of a vehicle body is opened and closed according to a reciprocating movement of a vehicle door between a door closing position and a door opening position, wherein a door tip rubber of the vehicle door is used. A door pinch detection device that detects whether the vehicle door is in a pinched state when the vehicle door is closed based on a displacement amount of an elastic hollow tube provided in the door, wherein the vehicle door is moved from the door open position. Each time a door closing operation movable to the door closing position is performed, the displacement amount of the elastic hollow tube at a time before the door closing operation is started is detected and stored as a reference value, and Detecting means for detecting, as a detection value, a displacement amount of the elastic hollow tube at a time when the vehicle door is located at the door closing position each time the vehicle door performs the door closing operation; Compare the reference value detected by the means with the detected value Tohasami detecting apparatus characterized by comprising a judging means for judging whether or not the door pinching state based on Rukoto. 2. The detecting means stores the displacement of the elastic hollow tube as the reference value when the vehicle door is performing a door opening operation of moving from the door closing position to the door opening position. The door jam detector according to claim 1, wherein: