JP4167758B2 - Foreign door detection method and device for automatic doors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for detecting foreign object pinching when a door is closed for an open / close door of a passenger train or other vehicle.
[0002]
[Prior art]
A limit switch that detects whether or not the door is fully closed when the door is closed is provided on an automatic opening / closing door of a railway vehicle or the like. When the door is not fully closed, a signal from the limit switch An abnormality detection device that outputs an abnormality signal is provided. Therefore, when a person's body or its luggage is sandwiched between doors, an abnormal signal is generated, the door is opened once, and the opening / closing operation is performed again.
[0003]
Furthermore, the method of detecting the opening and closing of the door with a limit switch is limited to a large foreign object that can be detected, and if it is small, it cannot be detected even if there is a slight gap, and the limit switch method has a limit. In order to cope with this, Japanese Patent Application Laid-Open No. 3-99972 discloses that two of the iron core coils that can be inductively coupled are fixed to one of the fixing members outside the door, and an alternating current is applied. The coil is fixed to the door side, and closes to the primary coil when the door is closed to form a transformer, and a method is disclosed in which the primary coil detects the change in current. If a foreign object is caught in the door, the primary and secondary coils are separated from each other, and electromagnetic coupling becomes insufficient, thereby detecting a change in current.
[0004]
Japanese Patent Application Laid-Open No. 10-81234 discloses a sensor in which a corresponding electrode is attached to an end surface of a door and a surface of a door stop that mates with the door, and both electrodes are in contact with each other when the door is completely closed. Thus, the abnormality detection device is configured by utilizing the current flow. The foreign matter sandwiched between the door and the door stopper can be detected because the electrodes do not contact each other.
[0005]
In Japanese Utility Model Laid-Open No. 4-11772, a rubber joint having a rubber optical fiber is attached along an edge of a door, and a light emitting part is guided to one end of the rubber optical fiber and a light detecting part to the other end. An optically fixed foreign object detection device is disclosed, and this device acts as a pressure sensor because the cross section of the rubber optical fiber contracts when the foreign object is caught in the door and the light guide amount is reduced. By measuring the change, the presence of a foreign object is detected.
[0006]
[Problems to be solved by the invention]
Most doors used in passenger trains are fitted with cushioning members that show soft rubber elasticity along the edges of the doors so that they will not damage the body even if they are caught by the doors when they are closed. ing. For example, a double sliding door type door is fixed such that a rubber cushioning member is in phase contact with the edge of the pair of doors.
[0007]
If a small foreign object such as a person's finger, an edge of clothing, or a string of belongings is caught in the door provided with such a buffer member, the foreign object is held without being pulled out by deformation of the rubber of the buffer member. Moreover, since the doors are completely closed, pinching cannot be detected by the detection method using the above limit switch or the method using a pair of induction coils. On the other hand, the above-described method using a rubber optical fiber is difficult to detect without deformation that causes the rubber cross section to contract considerably, and cannot be effectively detected for small foreign substances.
[0008]
In view of the above problems, the present invention intends to provide a method and an apparatus for effectively detecting a small foreign object sandwiched between buffer members even when the door is completely closed.
[0009]
[Means for Solving the Problems]
The foreign object detection method for an open / close door according to the present invention is a method for detecting that a foreign object is caught in an automatic open / close door of a vehicle or the like when the door is closed. A buffer member made of an elastic soft cylinder having a hollow portion is attached along the longitudinal direction of the door , and the buffer member is fixed along the longitudinal direction of the end surface of the door main body. The hollow portion is formed by a thin cylindrical portion covering the both ends of the fixing portion in a tubular shape, and the space between the protruding portion having a rectangular cross section protruding forward from the fixing portion and the inner surface of the cylindrical portion is defined as the hollow portion. Thus, a space without the protruding portion is provided on one end side of the buffer member, and light from the light emitting portion that is internally fixed in the space is provided in the hollow portion. possible blocking part or all, passed through is received by the light detecting portion of the other end of the buffer member, the light detection The detection signal from the section and detects a foreign object sandwiched between the cushioning member.
[0010]
Moreover, the foreign material detecting device for opening and closing a door of the present invention is a device for detecting a foreign matter is caught when the door closing the automatic door of the vehicle or the like, its features, said end edge edge of the door is attached along the longitudinal direction, Ri consists tubular body of elastic soft with a hollow portion therein, a fixed portion tube body is fixed along the longitudinal direction of the end face of the door body, the fixed A buffer member having a hollow space between a protrusion having a rectangular cross section protruding forward from the fixed portion and the inner surface of the tube portion, and a buffer member. A space without the protrusion is provided on one end side of the member, and a light-emitting portion that is internally fixed in the space to irradiate light to the hollow portion, and light of the hollow portion on the other end side of the buffer member A light detection unit that receives light, and a control that detects that a foreign object is caught by a buffer member when closed by a detection signal from the light detection unit , It is made of the capital.
[0011]
In this method and apparatus, if a foreign object is caught in the buffer member when the door is closed, the cylindrical body is dented, the hollow part is narrowed, the light in the hollow part is blocked, and the light is not detected by the light detection part. The presence of a foreign substance is known from the detection signal. By reducing the thickness of the cylindrical body and bringing the light closer to the inner surface of the cylindrical body, it is possible to cause a slight dent with a small foreign substance to block the light and detect it.
[0013]
Furthermore, it is preferable that the light emitting part and the light detecting part are disposed in the hollow part with a required distance.
[0014]
In the present invention, a semiconductor laser device for irradiating the hollow portion with a laser beam is preferably selected as the light emitting portion.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is widely applied to single-open and double-open sliding door type and double door type doors used in railway vehicles and other transportation devices used for passengers getting on and off. When these doors are attached to the edge of the cushioning member having soft rubber elasticity along the longitudinal direction of the edge, and when the door is normally closed, the door is normally closed with the cushioning member and the other doors. A door stop member (for example, a pillar or the like) is brought into contact with each other, and in a double door, the buffer members are usually in contact with each other.
[0016]
As shown in FIG. 1A, the buffer member 2 has a cylindrical portion 21 having a thin rubber elasticity toward at least the outer side, and a hollow portion 20 is formed as a through-hole through the vertical direction inside the cylindrical portion. ing. The cylindrical portion 21 is formed of a soft elastic material, such as rubber or elastomer, and is thin and soft enough to be easily recessed by a foreign object when the door is closed. The buffer member 2 is preferably provided with a fixing portion 22 fixed to the door body 10 and fixed to the cylinder portion 21 integrally or separately.
[0017]
In the detection method of the present invention, the hollow portion 20 of the above-described buffer member attached to the door is used as a passage for the light 40. For this purpose, the light emitting portion 4 is placed on one end side of the hollow portion 20 (in FIG. 1). , On the upper end side), the light detection unit 5 is disposed on the other end side (on the lower end side in the example of FIG. 1), and the light 40 emitted from the light emitting unit is allowed to pass through the hollow portion 20, The light detector 5 receives the light.
[0018]
The light 40 passing through the hollow part 20 from the light emitting part 5 and the light emitting part 4 so that the hollow of the cylindrical part can block part or all of the light 40 when a foreign object is caught between the buffer members when the door is closed. The arrangement of the detection unit 5 is adjusted.
[0019]
In a normal door closed state without pinching, the light detection unit 5 always receives the light in the hollow portion, so the detection signal from the light detection unit is a constant output, but when a foreign object is caught in the buffer member, Even if the light is blocked by the dent of the cylindrical portion, the output of the light detection portion changes, and the foreign matter is detected by the change of the output. A detection signal from the light detection unit 5 is easily processed by a control unit (not shown) including a microprocessor.
[0020]
In the detection device of the present invention, the light emitting unit 4 is disposed on one end side of the hollow portion and the light detection unit 5 is disposed on the other end side in the hollow portion 20 of the buffer member 2 attached to the door as described above. It is made up of.
The light emitting unit 4 includes a light emitting body, and allows light from the light emitting body to pass through the hollow portion. Preferably, the light emitting portion 4 includes an optical lens system that converges appropriately so that the light 40 is formed into a thin light beam in the hollow portion 20. Passing through is preferable to increase detection sensitivity. An incandescent lamp, a discharge tube, a light emitting diode, a laser diode, and other light sources can be used for the light emitting portion.
The other light detection unit 5 is an optical sensor that can convert light into an electrical signal. For example, a photodiode or a phototransistor is preferably used.
[0021]
The light emitting unit 4 and the light detecting unit 5 are formed by the depression of the cylindrical part 21 when the light 40 that passes through the hollow part from the light emitting unit and reaches the light detecting unit 5 is caught in the buffer member 2 when the door is closed. It is arranged to be blocked by.
[0022]
The light emitting unit 4 and the light detecting unit 5 may be arranged and fixed so as to ensure an appropriate light 40 at an appropriate position in the hollow portion 20 of the buffer member 2. Thereby, a desired detection height and its detection range can be set. As an example of the arrangement of the light emitting unit and the light detecting unit, a detection range may be set over the entire height of the open / close door as shown in FIGS. In this case, the light emitting unit and the light detecting unit are fixed to the upper end and the lower end of the buffer member. Further, foreign matter may be detected only in a part of the height of the opening / closing door. For example, in a train used for commuting in the city and its suburbs, it may be set to a height range above the knee of the person and below the neck. be able to.
[0023]
The signal line of the light detection unit is connected to the control unit, outputs a foreign object detection signal from the control unit, and the output signal is displayed by an appropriate display means.
[0024]
Furthermore, in trains, foreign object detection devices are installed on all the lift doors of all vehicles, signals from each detection device are sequentially input to the control unit, and the vehicle doors that have detected foreign objects are identified and output from the control unit. You can also display the display device. Monitors are placed in the train cab and conductor's cab, and after the passengers are lifted and lowered at the stop station, the monitor is monitored when the door is closed, and when a foreign object is detected, the door is opened. When the foreign object sandwiched between the doors is removed, the door is closed again.
[0025]
【Example】
FIG. 1 (B) is an example in which the apparatus of the present invention is applied to a double door 1a, 1b for raising and lowering a railway vehicle, but the inside of the hollow portion 20 of the buffer member 2a of the door 1a on one side of both doors. The light emitting unit 4 and the light detecting unit 5 are fixed to the upper end and the lower end, respectively.
[0026]
FIG. 2 shows the details of the buffer member 2, but in FIG. 2 (B, C), the buffer member 2 is swelled forward from the fixed portion 22 for fixing to the edge of the door 1 and the fixed portion 22. It is comprised integrally with the cylinder part 21 to perform, and is extrusion-molded from the rubber material. The buffer member 2 has grooves 24 formed on both sides of the fixing portion 22, and is fixed by fitting bent portions 14 at the front end of the metal plate protruding forward from both edge portions of the door 1 into the groove 24.
[0027]
Further, the hollow portion 20 behind the cylindrical portion 21 is formed with a protruding portion 25 having a rectangular cross section protruding forward from the fixed portion 22, and a space between the tip of the protruding portion 25 and the inner surface of the cylindrical portion 21 is light. Used for This empty space also defines a recess allowance for the cylindrical portion 21 to be recessed when a foreign object is caught. When a foreign object is caught in the door, as shown by a two-dot chain line in FIG. 2C, the inner surface of the cylindrical portion 21 of the buffer member 2 is deformed so as to come into contact with the front surface of the protruding portion 25. 40 is blocked. The dent margin is, for example, in the range of 3 to 20 mm, and preferably 3 to 6 mm. By using such a buffer member, even if the foreign matter sandwiched between the doors is small, it can be sufficiently detected as long as it has a size that allows the cylindrical portion 21 to have a recess of several millimeters. As a result, a detection device having a high detection capability can be obtained.
[0028]
FIG. 2A shows details of fixing the light emitting unit 4 to the buffer member 2, but in this example, the light emitting unit 3 is the upper end side of the buffer member, and the protrusion 25 in the hollow portion 22 is deleted. The light emitting window 401 at the front end of the light emitting unit 4 is accurately fixed in the space between the front end of the protrusion 25 and the inner surface of the tube part 21, and is irradiated with light to pass through the inside of the hollow part. A penetrating light 40 is provided.
[0029]
FIG. 3 shows a fixing base 3 for accommodating the light emitting unit 4 and directing light. The fixing base 3 covers the base 30 and the base 30 for fixing the light emitting unit 4. The base 30 is provided with a pair of parallel projecting pieces 31 and 31, and the side edge 32 is bent upward.
As shown in FIG. 3, the light-emitting unit 4 includes a light-emitting body 41, for example, a semiconductor laser device 41, whose side surface is sandwiched between the projecting pieces 31, 31. The direction of the light 40 from the irradiation port or the light emission window 401, in this case, the direction of the laser beam can be adjusted at the same time.
[0030]
The shape of the cover 36 is a semicircular or mountain shape in cross section that can cover the light emitting part, and its outer shape can be adapted to the inner surface of the hollow part, and its lower piece 361 is folded back horizontally. is there.
The cover 36 can be easily fixed to the base 30 by fitting the lower piece 361 inside the side edge 32 of the base 30 to which the light emitting part is fixed. .
The fixing base 3 formed in this way is inserted into the hollow portion 20 and fixed from the upper end portion of the buffer member 2 as shown in FIGS.
[0031]
Although the other light detection unit 5 is not particularly illustrated, a fixing base similar to that of the light emitting unit 4 can be used, and is inserted into the hollow portion 20 from the lower end portion of the buffer member 2 and fixed. . In this case, the light receiving window (not shown) of the light detection unit 5 is adjusted to face the light emitting unit 4 side so that the light 40 can be sensed.
[0032]
【The invention's effect】
The foreign matter detection method for an open / close door according to the present invention uses an elastic soft cylinder having a hollow portion of a buffer member attached to an edge of the open / close door, and allows light from a light emitting portion to pass through the hollow portion. Since it is detected by the detection unit, it is designed to detect the depression of the cylinder due to foreign matter caught when the door is closed, so even small objects can be detected with high sensitivity, and accidents caused by pinching of the door will occur. Can be effectively prevented.
[0033]
Furthermore, the foreign object detection device for an opening / closing door according to the present invention uses an elastic soft cylinder having a hollow portion of a buffer member attached to an edge of the opening / closing door, and passes through a light emitting portion that transmits light into the hollow portion. A light detection unit that receives light, and detects foreign objects pinched when the door is closed by blocking light by the depression of the cylindrical body. Can be detected.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a door provided with a foreign object detection device according to an embodiment of the present invention, showing an example of a single door (A) and an example of a double door (B).
FIG. 2 is a schematic longitudinal cross-sectional view (B) of a buffer member attached to a door of a foreign object detection device according to an embodiment of the present invention, and a partial cross-sectional view indicated by arrows YY and XX in the figure. (A, C).
FIG. 3 is an external view of a light emitting unit of a foreign object detection device according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door 10 Door main body 2 Buffer member 20 Hollow part 21 Cylinder part 4 Light emission part 40 Light 5 Light detection part

Claims (5)

In a method for detecting that a foreign object is caught in an automatic opening / closing door such as a vehicle when the door is closed,
A shock-absorbing member made of an elastic soft cylinder having a hollow portion is attached to the end edge of the open / close door along the longitudinal direction of the end edge. And a thin cylindrical portion that covers the both ends of the fixing portion in a tubular shape, and a space between a projection having a rectangular cross section protruding forward from the fixing portion and the inner surface of the cylindrical portion. Where the above-mentioned hollow part is,
A space without the protrusion is provided on one end side of the buffer member, and the light from the light emitting unit fixed internally in the space is hollowed, and a part of the light is trapped when the buffer member is sandwiched when closed Alternatively, it is possible to block all, allowing the light detection unit on the other end side of the buffer member to receive light, and detecting a foreign matter sandwiched between the buffer members by a detection signal from the light detection unit. A foreign object detection method for opening and closing doors.   The open / close door is a double door with the buffer member attached to an opposing edge, and a detection device including the light emitting unit and the light detection unit is disposed on one or both of the buffer members. 1 method. In an apparatus for detecting that a foreign object is caught in an automatic opening / closing door such as a vehicle when the door is closed,
Is attached along the longitudinal direction of the end edges the edge of the door, Ri consists tubular body of elastic soft with a hollow portion therein, the cylindrical body along the longitudinal direction of the end face of the door body The fixed portion and a thin cylindrical portion that covers the both ends of the fixed portion in a tubular shape, and a space between the protruding portion having a rectangular cross section protruding forward from the fixed portion and the inner surface of the cylindrical portion is described above. A cushioning member to be a hollow part ;
A light emitting part for providing a space without the protrusion on one end side of the buffer member, being fixed to the space, and irradiating the hollow part with light;
A light detection unit that receives light of the hollow portion on the other end side of the buffer member;
And a control unit for detecting that a foreign material is caught in the buffer member when closed by a detection signal from the light detection unit. The apparatus according to claim 3, wherein the light emitting unit and the light detecting unit are disposed in the hollow portion with a predetermined distance therebetween. The device according to claim 3, wherein the light emitting unit is a semiconductor laser device for guiding a laser beam into the hollow portion.

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