JP2013006469A - Detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detecting device capable of detecting dragging.SOLUTION: First pressure chambers 11a, 21a are formed outside a vehicle, respectively, to door top rubber 5, 6 attached to ends of doors 2, 3 opening and closing an entrance of the vehicle, and second pressure chambers 11b, 21b are formed inside the vehicle, respectively. A pressure detecting part outputs signals corresponding to the internal pressure of the respective pressure chambers 11a, 21a. A controller determines dragging when pressure in both pressure chambers 11a, 21a increases, and then the pressure of one of the pressure chambers 11a, 21a decreases on the basis of the pressure of the respective pressure chambers 11a, 21a.

Description

  The present invention relates to a detection device for a vehicle.

  2. Description of the Related Art Conventionally, some vehicles such as railways are provided with a detection device that detects that a belonging or the like is caught when the vehicle door is closed. For example, this detection device is provided with a door rubber at the tip of the vehicle door, and detects whether the door rubber is pressed by detecting the pressing state of the door rubber when the vehicle door is closed. To detect. In other words, this detection device detects a change in the pressing state of the door rubber because the door rubber is pressed in a state different from normal when a belonging or the like is caught when the vehicle door is closed. Thus, the door-slipping state is detected. For example, a detection device that detects a deformation of the door rubber, that is, a pressed state by forming a space in the door rubber and detecting a pressure change in the space has been proposed (see, for example, Patent Document 1). .

JP 2008-8121 A

  By the way, for example, when a person's belongings (for example, a bag) outside the vehicle are caught, the objects are dragged along with the belongings as the vehicle starts. On the other hand, when a person's belongings (for example, a bag) are caught in the vehicle, door pinching is also detected when the caught object is pulled inside the vehicle, so the vehicle is stopped to open and close the door, There was a risk of hindering operation.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a detection device capable of detecting a drag.

  To achieve the above object, according to the present invention, there is provided a first embodiment in which a pair of doors that open and close a doorway of a vehicle are respectively attached to opposite ends and elastically deformable hollow portions are formed on the outer sides of the respective vehicles. The door rubber and the second door rubber, a pressure detection unit that outputs a pressure signal corresponding to the internal pressure of the hollow portion, and the first door rubber and the first door rubber based on the output signal of the pressure detection unit After the pressure of the hollow portion of the second door-end rubber has increased, when the pressure of the hollow portion of either the first door-end rubber or the second door-end rubber has decreased A determination unit that determines dragging.

  A plurality of the hollow portions are formed in at least one of the first door-end rubber and the second door-end rubber, and the pressure detection unit includes the first door-end rubber and the second door-end rubber. Pressure signals corresponding to the internal pressures of the plurality of hollow portions formed in the rubber tip are respectively output, and the determination unit determines dragging based on the plurality of output signals output from the pressure detection unit.

  Further, the determination unit stores a difference in internal pressure of each of the hollow portions when the door is closed and opened as a reference pressure difference, and when the door is opened and closed based on output signals of the plurality of pressure detection units. The detected pressure difference is calculated by measuring a change in the internal pressure of each hollow portion, and the drag is determined based on a result of comparing the reference pressure difference and the detected pressure difference.

  Further, the determination unit is configured such that a detected pressure difference with respect to each of a hollow portion formed on the outer side of the first door rubber and a hollow portion formed on the outer side of the second door rubber is the reference pressure. The detected pressure difference of at least one of the hollow portion formed inside the first door rubber and the hollow portion formed inside the second door rubber is larger than the difference. When the pressure difference is equal to the reference pressure difference, the drag determination is canceled.

  In addition, the determination unit includes at least one of a detected pressure difference with respect to each of a hollow portion formed inside the first door rubber and a hollow portion formed inside the second door rubber. One is larger than the reference pressure difference, and the detected pressure difference between the hollow portion formed on the vehicle exterior side of the first door-end rubber and the hollow portion formed on the vehicle exterior side of the second door-end rubber is the reference pressure difference. The drag determination is canceled when the pressure difference is equal.

  As described above, according to the present invention, it is possible to provide a detection device capable of detecting drag.

The partial side view of a vehicle. (A) is a plane cross-sectional view of the door rubber, (b) is a vertical cross-sectional view of the door rubber. The schematic block diagram of a detection apparatus. Explanatory drawing of an operation state. Explanatory drawing of an operation state. Explanatory drawing of an operation state. Explanatory drawing of an operation state.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, two doors 2 and 3 are attached to a vehicle body 1 of a train corresponding to a vehicle so as to be slidable in the front-rear direction of the vehicle body 1 (left-right direction in FIG. 1). Both doors 2 and 3 are mechanically connected to an actuator (not shown) such as a door motor, and slide in the front-rear direction based on driving of the actuator to open and close the entrance / exit 4 of the vehicle body 1.

  Door end rubbers 5 and 6 are attached to the front ends of the doors 2 and 3 over substantially the entire height of the doors 2 and 3. The door-end rubbers 5 and 6 are configured by elastically deformable members. The door rubbers 5 and 6 are in close contact with each other when the doors 2 and 3 are closed. Specifically, the door end rubbers 5 and 6 are in close contact with each other and elastically deformed due to their tips interfering with each other. Close without gaps.

  As shown in FIG. 2A, the door rubber 5 is formed with two pressure chambers 11a and 11b. Both the pressure chambers 11a and 11b are formed in a circular shape, for example, when the door rubber 5 is cut along a plane perpendicular to the longitudinal direction thereof. The first pressure chamber 11 a and the second pressure chamber 11 b are formed at the distal end portion 5 a of the door rubber 5. The first pressure chamber 11a is located inside the door rubber 5 and is formed on the outside of the vehicle (denoted [outside the vehicle]), and the second pressure chamber 11b is located inside the door rubber 5 and It is formed on the inside (indicated as [inside the car]). The first pressure chamber 11a and the second pressure chamber 11b are arranged along an axis perpendicular to the door 2, for example.

  As shown in FIG. 2 (b), the first pressure chamber 11 a is formed in a vertically long space in which the upper and lower end portions are open along the longitudinal direction of the door rubber 5. The lower end of the first pressure chamber 11a is sealed in an airtight state by a stopper 12a. Similarly, the second pressure chamber 11b is formed in a vertically long space in which upper and lower end portions are opened along the longitudinal direction of the door rubber 5. The lower end of the second pressure chamber 11b is sealed in an airtight state by a plug 12b.

  As described above, the door rubber 5 is formed of an elastically deformable member. Accordingly, the door rubber 5 is deformed by a force applied from the outside. The deformation of the door rubber 5 changes the sectional area of the first pressure chamber 11a and the sectional area of the second pressure chamber 11b. That is, each of the first pressure chamber 11 a and the second pressure chamber 11 b changes in shape (cross-sectional area) due to the force applied to the door rubber 5.

  The deformation amount of the first pressure chamber 11 a and the deformation amount of the second pressure chamber 11 b correspond to the direction of the force applied to the door rubber 5. In FIG. 2A, for example, when force is applied to the door rubber 5 from [outside the vehicle], the deformation amount of the first pressure chamber 11a is larger than the deformation amount of the second pressure chamber 11b. Conversely, when a force is applied to the door rubber 5 from [inside the vehicle], the deformation amount of the first pressure chamber 11a is smaller than the deformation amount of the second pressure chamber 11b.

  Similarly, the door rubber 6 has two pressure chambers 21a and 21b. That is, both the pressure chambers 21a and 21b are formed in a circular shape, for example, when the door rubber 6 is cut by a plane perpendicular to the longitudinal direction. The first pressure chamber 21 a and the second pressure chamber 21 b are formed at the tip 6 a of the door rubber 6. The first pressure chamber 21a is located inside the door rubber 6 and is formed on the outside of the vehicle (denoted [outside the vehicle]), and the second pressure chamber 21b is located inside the door rubber 6 and It is formed on the inside (indicated as [inside the car]). For example, the first pressure chamber 21 a and the second pressure chamber 21 b are arranged along an axis perpendicular to the door 3.

  As shown in FIG. 2B, the first pressure chamber 21 a is formed in a vertically long space shape in which the upper and lower end portions are open along the longitudinal direction of the door rubber 6. The lower end of the first pressure chamber 21a is sealed in an airtight state by a plug 22a. Similarly, the second pressure chamber 21b is formed in a vertically long space in which the upper and lower ends are opened along the longitudinal direction of the door rubber 6. The lower end of the second pressure chamber 21b is sealed in an airtight state by a plug 22b.

  As described above, the door rubber 6 is formed of an elastically deformable member. Accordingly, the door rubber 6 is deformed by a force applied from the outside. The deformation of the door rubber 6 changes the cross-sectional area of the first pressure chamber 21a and the cross-sectional area of the second pressure chamber 21b, respectively. That is, the first pressure chamber 21 a and the second pressure chamber 21 b change in shape (cross-sectional area) due to the force applied to the door rubber 6.

  The deformation amount of the first pressure chamber 21 a and the deformation amount of the second pressure chamber 21 b correspond to the direction of the force applied to the door rubber 6. In FIG. 2A, for example, when force is applied to the door rubber 6 from [outside of the vehicle], the deformation amount of the first pressure chamber 21a is larger than the deformation amount of the second pressure chamber 21b. Conversely, when a force is applied to the door rubber 6 from [inside the vehicle], the deformation amount of the first pressure chamber 21a is smaller than the deformation amount of the second pressure chamber 21b.

  The upper end of the door rubber 5 is connected to the pressure sensor 13. As shown in FIG. 2A, the pressure sensor 13 includes two pressure detectors 13a and 13b. The first pressure detector 13a detects the internal pressure of the first pressure chamber 11a. And the pressure detection part 13a outputs the pressure signal of the analog quantity according to the detected pressure to the signal conversion part (signal conversion unit) 14 shown in FIG. Similarly, the second pressure detector 13b detects the internal pressure of the second pressure chamber 11b. And the pressure detection part 13b outputs the pressure signal of the analog quantity according to the detected pressure to the signal conversion part 14 shown in FIG.

  As shown in FIG. 3, the signal converter 14 converts the pressure signal output from the pressure detector 13 a into a digital signal, and outputs the converted signal to the controller 31. The signal conversion unit 14 converts the pressure signal output from the pressure detection unit 13 b into a digital signal, and outputs the converted signal to the controller 31.

  Similarly, as shown in FIG. 2B, the upper end of the door rubber 6 is connected to the pressure sensor 23. As shown in FIG. 2A, the pressure sensor 23 includes two pressure detectors 23a and 23b. The first pressure detector 23a detects the internal pressure of the first pressure chamber 21a. And the pressure detection part 23a outputs the pressure signal of the analog quantity according to the detected pressure to the signal conversion part (signal conversion unit) 24 shown in FIG. Similarly, the second pressure detector 23b detects the internal pressure of the second pressure chamber 21b. And the pressure detection part 23b outputs the pressure signal of the analog quantity according to the detected pressure to the signal conversion part 24 shown in FIG.

  The signal converter 24 converts the pressure signal output from the pressure detector 23 a into a digital signal, and outputs the converted signal to the controller 31. The signal conversion unit 24 converts the pressure signal output from the pressure detection unit 23 b into a digital signal, and outputs the converted signal to the controller 31.

  The controller 31 measures the pressure in each pressure chamber 11a, 11b, 21a, 21b based on signals output from the signal conversion units 14, 24. The controller 31 determines the presence or absence of dragging based on each measured pressure. Then, the controller 31 outputs a signal corresponding to the determination result to a higher-level device, for example, the control device of the vehicle body 1 via the signal line 32. In response to a signal output from the controller 31, the control device controls, for example, lighting of the display lamp.

Next, the operation of the detection device will be described.
In the initial setting process, the controller 31 sets a reference pressure difference based on the pressures of the pressure chambers 11a, 11b, 21a, and 21b measured according to the opening and closing of the doors 2 and 3. Specifically, the controller 31 detects the pressure in the first pressure chamber 11a when the doors 2 and 3 are closed without being caught (the pressure value at the time of closing) and the first pressure chamber 11a when the doors 2 and 3 are opened. Measure the pressure (opening pressure value). Then, the controller 31 subtracts the opening pressure value from the closing pressure value, and stores the calculation result in a storage device (not shown) as a reference pressure difference with respect to the first pressure chamber 11a. Similarly, the controller 31 measures the closed pressure value and the open pressure value of the pressure chambers 11b, 21a, and 21b according to the opening and closing of the doors 2 and 3, respectively, and provides a reference for the pressure chambers 11b, 21a, and 21b. The pressure difference is calculated, and each reference pressure difference is stored in the storage device.

  In the normal process, the controller 31 measures the pressure difference according to the pressure change in each of the pressure chambers 11a, 11b, 21a, and 21b, and compares the measurement result with the reference pressure difference to determine the state such as dragging. To do.

  More specifically, the controller 31 measures the pressure in the pressure chamber 11a at a predetermined timing. The predetermined timing is set at a constant time interval by a timer circuit or the like, for example. The controller 31 measures the pressure change in the pressure chamber 11a, that is, the pressure value when the doors 2 and 3 are opened and the pressure value when the doors 2 and 3 are closed, and the pressure value when the doors 2 and 3 are closed. The difference from the pressure value (detected pressure difference) is calculated. Similarly, the controller 31 calculates the detected pressure difference with respect to each pressure chamber 11b, 21a, 21b. Then, the controller 31 compares the detected pressure difference with the reference pressure difference for each of the pressure chambers 11a, 11b, 21a, and 21b, and determines a state such as dragging based on the comparison result.

  The controller 31 determines that there is no abnormality when the detected pressure difference is equal to the reference pressure difference or the detected pressure difference is within an allowable range set for the reference pressure difference. On the other hand, the controller 31 determines that there is an abnormality when the detected pressure difference is not equal to the reference pressure difference or the detected pressure difference is not within the allowable range.

  For example, as shown in FIG. 4, a sandwiched body 41 is sandwiched between the doors 2 and 3. The sandwiched body 41 suspends the main body portion with a thin or thin member such as a string, such as a handbag. In this case, when the main body is sandwiched between the doors 2 and 3, the pressures of all the pressure chambers 11a, 11b, 21a and 21b are higher than usual. Therefore, the controller 31 determines that there is pinching because the detected pressure difference between the pressure chambers 11a, 11b, 21a, and 21b is larger than the reference pressure difference, and outputs a signal corresponding to the determination.

  On the other hand, when only a member such as a string is sandwiched between the doors 2 and 3, the pressure change of all the pressure chambers 11a, 11b, 21a, and 21b, that is, the detected pressure difference is the normal pressure change, that is, the reference pressure difference. A close value. In such a case, as shown by a solid line in FIG. 4, when the sandwiched body 41 sandwiched between the doors 2 and 3 is pulled vertically from the inside of the vehicle with respect to the doors 2 and 3, the pressure chamber 11 a on the outside of the vehicle. , 21a is higher than normal (when there is no pinching). Furthermore, as shown by a one-dot chain line in FIG. 4, when the sandwiched body 41 is pulled leftward with respect to the doors 2 and 3, the pressure in the pressure chamber 11 b on the inside of the vehicle is higher than usual according to the pulling direction. Also gets higher. Similarly, as shown by a two-dot chain line in FIG. 4, when the sandwiched body 41 is pulled rightward with respect to the doors 2 and 3, the pressure in the pressure chamber 21 b inside the vehicle is usually set in accordance with the pulling direction. Higher than time.

  Therefore, when the detected pressure difference with respect to the pressure chambers 11a and 21a on the outside of the vehicle is larger than the reference pressure difference, the controller 31 determines that the person's belongings in the vehicle are sandwiched between the doors 2 and 3, and the determination is made. A corresponding signal is output. In addition, when the detected pressure difference between the pressure chambers 11a and 21a on the outside of the vehicle is larger than the reference pressure difference, and the detected pressure difference on one of the pressure chambers 11b and 21b on the inside of the vehicle is larger than the reference pressure difference, It is determined that a person's belongings in the vehicle are sandwiched between the doors 2 and 3, and a signal corresponding to the determination is output.

  Moreover, as shown in FIG. 5, when the to-be-clamped body 41 is pinched | interposed between the doors 2 and 3, the pressure of each pressure chamber 11a, 11b, 21a, 21b becomes higher than usual (when there is no pinching). . Thereafter, when the vehicle departs, the pressure in the pressure chamber 21a formed at the doorway rubber 5 of the door 3 in the traveling direction at the entrance / exit is relative to the traveling direction of the vehicle (the direction indicated by the arrow in FIG. 5). descend. Therefore, after the pressure in each of the pressure chambers 11a, 11b, 21a, and 21b has increased, the controller 31 determines that the drag has occurred when the pressure in any one of the pressure chambers 11a and 21a on the outside of the vehicle has decreased. A signal corresponding to the determination result is output.

  It should be noted that a person's belongings outside the vehicle (personal belongings of the person who got off the vehicle), such as a drawstring bag, is a thing in which the sandwiched body 41 is suspended by a thin string-like member, and the string-like member is between the doors 2 and 3. When sandwiched, the sandwiched body 41 is pulled toward the outside of the vehicle. Accordingly, the pressure in the pressure chambers 11b and 21b on the vehicle interior is higher than the pressure in the pressure chambers 11a and 21a on the vehicle exterior. Thereafter, when the vehicle departs, the pressure in the pressure chamber formed in the door rubber of the door opposite to the traveling direction of the vehicle becomes higher than normal. In addition, the pressure of the pressure chamber formed in the door-end rubber of the door on the traveling direction side may be lower than usual. In such a case, the controller 31 detects that the detected pressure difference with respect to the pressure chambers 11b and 21b inside the vehicle is larger than the reference pressure difference, and the detected pressure difference between any one of the pressure chambers 11a and 21a outside the vehicle. Is larger than the reference pressure difference, it is determined as dragging, and a signal corresponding to the determination is output.

  Further, as shown in FIG. 6, when a person or object in the vehicle is pressed against the door rubbers 5, 6, the pressure in the pressure chambers 11b, 21b inside the vehicle is higher than normal (when there is no pinching). Thus, the pressure in the pressure chambers 11a, 21a on the vehicle exterior side is substantially equal to that in the normal state. Therefore, the controller 31 determines that there is no dragging based on the detected pressure difference and the reference pressure difference of each pressure chamber 11a, 11b, 21a, 21b, and cancels the dragging determination.

  Further, as shown in FIG. 7, when sunlight such as the western sun is applied to the door rubbers 5 and 6, the pressures in the pressure chambers 11a and 21a outside the vehicle gradually increase. However, the pressure in the pressure chambers 11a and 21a when the doors 2 and 3 are closed (pressure value at the time of closing) and the pressure of the pressure chambers 11a and 21a when the doors 2 and 3 are opened (the pressure value at the time of opening) are respectively solar. Since the pressure is due to the gas warmed by light, the change in the difference between the closed pressure value and the open pressure value (detected pressure difference) is compared to the case where the object 41 is sandwiched between the doors 2 and 3. And few. In this case, the pressure in the pressure chambers 11b and 21b inside the vehicle does not increase. Therefore, the controller 31 determines that the pressure change due to the irradiation of sunlight is not dragging.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The first pressure chambers 11a and 21a are formed on the outside of the vehicle on the door rubbers 5 and 6 attached to the ends of the doors 2 and 3 that open and close the entrance / exit 4 of the vehicle body 1, respectively. Second pressure chambers 11b and 21b are formed inside the vehicle, respectively. The pressure detectors 13a, 13b, 23a, and 23b output signals corresponding to the internal pressures of the pressure chambers 11a, 11b, 21a, and 21b. The controller 31 determines the state of dragging and the like based on the pressures of the pressure chambers 11a, 11b, 21a, and 21b detected by the pressure detection units 13a, 13b, 23a, and 23b. After the pressure in each of the pressure chambers 11a, 11b, 21a, and 21b has increased, the controller 31 has a pressure chamber 11a formed in the door rubber 5 of the door 2 and a pressure chamber 21a formed in the door rubber 6 of the door 3. When the pressure of any one of these drops, it is determined to be dragging. By determining in this way, dragging can be detected.

  (2) The pressure in each of the pressure chambers 11a, 11b, 21a, and 21b is increased in the pulling direction of the sandwiched body 41, for example, when the sandwiched body 41 sandwiched between the doors 2 and 3 is pulled from the inside of the vehicle body 1. Will change accordingly. Therefore, for each of the pressure chambers 11a, 11b, 21a, and 21b, by detecting the difference between the pressure when the doors 2 and 3 are opened and the pressure when the doors are closed (detected pressure difference), the determination is canceled. It is possible to reliably determine a necessary state, that is, to improve detection accuracy.

  (3) The controller 31 stores the difference in internal pressure between the pressure chambers 11a, 11b, 21a, 21b when the doors 2, 3 are closed and opened as reference pressure differences. The controller 31 measures and detects changes in the internal pressures of the pressure chambers 11a, 11b, 21a, and 21b when the doors 2 and 3 are opened and closed based on the output signals of the pressure detectors 13a, 13b, 23a, and 23b. Calculate the pressure difference. Then, the controller 31 detects the presence or absence of dragging based on the result of comparing the reference pressure difference and the detected pressure difference. Therefore, for example, it is possible to cancel the change in the internal pressure of each pressure chamber 11a, 11b, 21a, 21b, such as the pressure change due to the temperature change, and to accurately detect the pressure change due to being sandwiched between the doors 2, 3. It becomes possible. Further, it is possible to prevent erroneous detection by canceling the change in the internal pressure.

  (4) The controller 31 has a detected pressure difference with respect to each of the pressure chambers 11a and 21a outside the vehicle larger than the reference pressure difference, and the detected pressure difference between at least one of the pressure chambers 11b and 21b inside the vehicle is the reference pressure. Cancel dragging determination when equal to difference. Accordingly, when the object to be clamped 41 is pulled from the inside of the vehicle body 1, it is determined that the object is not dragged, thereby detecting that the object to be clamped 41 is pulled from the outside of the vehicle body 1, that is, improving the detection accuracy. Can do.

  (5) The controller 31 determines that at least one of the detected pressure differences with respect to the pressure chambers 11b and 21b inside the vehicle is larger than the reference pressure difference, and the detected pressure difference between the pressure chambers 11a and 21a outside the vehicle is the reference pressure difference. Cancels dragging judgment when equal to. Therefore, for example, when the door rubbers 5 and 6 are pressed from the inside of the vehicle, such as when an object hits the door rubber from inside the vehicle, it is determined that the object is not dragged from the outside of the vehicle. Can be detected, that is, the detection accuracy can be improved.

In addition, you may implement the said embodiment in the following aspects.
In the above embodiment, two pressure chambers 11 a and 11 b are formed in one door rubber 5, and two pressure chambers 21 a and 21 b are formed in one door rubber 6. On the other hand, each pressure chamber may be formed in different door rubbers. That is, the doorside rubber on the outside of the vehicle in which one pressure chamber is formed and the doorside rubber on the inside of the vehicle in which one pressure chamber is formed are attached to the tips of the doors 2 and 3. Even if it does in this way, the effect similar to the said embodiment can be acquired.

  In the above embodiment, the pressure sensors 13, 23 are connected to the upper ends of the door rubbers 5, 6, but are connected to the lower ends of the door rubbers 5, 6, and the upper ends of the pressure chambers 11a, 11b, 21a, 21b are connected. You may make it close.

  The arrangement of the pressure chambers 11a, 11b, 21a, 21b may be changed as appropriate with respect to the above embodiment. For example, the second pressure chambers 11b and 21b may be formed on the front end sides of the door rubbers 5 and 6 with respect to the first pressure chambers 11a and 21a. Further, the second pressure chambers 11b and 21b may be formed close to the base end side of the door rubbers 5 and 6, that is, close to the tips of the doors 2 and 3, respectively.

  -You may change suitably the number of the pressure chambers formed in each door rubber | gum 5 and 6 with respect to the said embodiment. Further, the number of pressure chambers formed in the door rubber 5 and the number of pressure chambers formed in the door rubber 6 may be set to different numbers.

  In addition, when three or more pressure chambers are formed in the door rubber, the plurality of pressure chambers are arranged along an axis perpendicular to the door, arranged along the tip of the door rubber, etc. You may make it set suitably.

In the above embodiment, the entrance / exit 4 is opened and closed by the two doors 2 and 3, but the present invention is not limited to this, and for example, the entrance / exit may be opened and closed by one door.
In the above embodiment, the present invention is applied to a sliding door, but may be applied to a folding door. In the above embodiment, the present invention is applied to a train door. However, the present invention is not limited to this. For example, the present invention can be applied to vehicle doors such as a bus door, a ship door, and an airplane door.

  DESCRIPTION OF SYMBOLS 2,3 ... Door, 5,6 ... Door rubber | gum, 11a ... 1st pressure chamber (1st hollow part), 11b ... 2nd pressure chamber (2nd hollow part), 21a ... 1st pressure Chamber (third hollow portion), 21b ... second pressure chamber (fourth hollow portion), 13a, 23b ... first pressure detector, 13b, 23b ... second pressure detector, 31 ... controller ( Determination unit), 41.

Claims (5)

A first door-end rubber and a second door-end rubber that are attached to the opposite ends of a pair of doors that open and close the entrance / exit of the vehicle and that have elastically deformable hollow portions formed on the outer sides of the respective vehicles. When,
A pressure detector that outputs a pressure signal corresponding to the internal pressure of the hollow portion;
After the pressure of the hollow portion of the first door rubber and the second door rubber is increased based on the output signal of the pressure detector, the first door rubber and the second door A determination unit that determines dragging when the pressure of the hollow portion of any one of the rubber tips decreases;
A detection device comprising: A plurality of the hollow portions are formed in at least one of the first door-end rubber and the second door-end rubber,
The pressure detector outputs pressure signals corresponding to internal pressures of a plurality of hollow portions formed in the first door rubber and the second door rubber,
The determination unit determines drag based on a plurality of output signals output from the pressure detection unit,
The detection apparatus according to claim 1.   The determination unit stores, as a reference pressure difference, a difference between internal pressures of the hollow portions when the door is closed and opened, and each of the plurality of pressure detection units is opened and closed based on output signals of the pressure detection units. 3. The drag is determined based on a result of comparing a difference between the reference pressure difference and the detected pressure difference by measuring a change in internal pressure of the hollow portion. The detection device according to 1.   The determination unit is configured such that a detected pressure difference with respect to each of a hollow portion formed on the outer side of the first door-end rubber and a hollow portion formed on the outer side of the second door-end rubber is greater than the reference pressure difference. And the detected pressure difference of at least one of the hollow portion formed inside the first door rubber and the hollow portion formed inside the second door rubber is the reference pressure. The detection apparatus according to claim 3, wherein the drag determination is canceled when equal to the difference.   The determination unit is configured such that at least one of the detected pressure differences between the hollow portion formed on the inner side of the first door-end rubber and the hollow portion formed on the inner side of the second door-end rubber is The detected pressure difference between the hollow part formed outside the first door rubber and the hollow part formed outside the second door rubber is larger than the reference pressure difference. The detection apparatus according to claim 3, wherein the drag determination is canceled when equal to.

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