JPH0399972A - Door jam detecting device - Google Patents

Abstract

PURPOSE:To detect the jamming of a relatively small foreign object by providing a transformer separated into the primary coil and secondary coil and a foreign object sensor connected to the secondary coil, and increasing or decreasing the current flowing in the secondary coil in response to the detected result of the foreign object sensor. CONSTITUTION:When a large foreign object is jammed between doors 5 and 7 of a railroad car and doors 5 and 7 are kept at the opened state, the primary coil 13 and the secondary coil 15 are separated, and a current sensor 43 provided on the primary coil 13 side shows a large value 1a. When a foreign object is jammed between doors 5 and 7 although the primary coil 13 and the secon dary coil 15 are closely stuck to each other and doors 5 and 7 are in the closed state, a pressure sensitive sensor 35 is set to the on-state, and a load current flows in the secondary coil 15. The current flowing in the primary coil 13 is increased by the mutual induction action of the secondary coil 15, and the current sensor 43 likewise shows a large value 1c. A door jam is detected based on the output of the current sensor 43.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a door jamb detection device for detecting foreign matter caught in a door used in a vehicle or the like.

[Prior art] Conventionally, as such a door jamming detection device, a device that uses a limit switch to detect whether or not the upper door has been reliably advanced to the end of its stroke when closing has been put into practical use, for example in railway vehicles. has been made into

However, if a small foreign object is caught in the door, the foreign object may get stuck in the rubber installed at the edge of the door, and the door may reach the end of its stroke when closing. As a result, the foreign object cannot be detected. Therefore, as a countermeasure to this problem, a pressure sensor is installed inside the rubber installed in the door, and detects whether a foreign object is caught by changing the pressure. A device has been proposed (``Railroad Vehicle Door Detection Device'' described in Japanese Utility Model Application Publication No. 59-131362).

[Problems to be Solved by the Invention] By the way, such a door jamb detection device is capable of detecting a door jamb.Since a pressure-sensitive sensor is installed on a door that moves relative to a main body such as a car body, The transfer of signals to and from the pressure sensor is done electrically using a movable contact.For this reason, the movable contact is prone to poor contact and has poor durability. Table 1 of the present invention has been developed in view of these problems.
A door jam detection device that can detect even relatively small foreign objects that would cause the door to remain closed even if it gets caught, and can also send and receive signals from the sensor installed in the door with high reliability. is intended to provide.

[Means for Solving the Problems] In order to achieve the above object, as means for solving the problems, the present invention has the following configuration. That is, as set forth in claim 1. invention (hereinafter referred to as the first invention)
(In a door jamming detection device equipped with a foreign object sensor that detects when a foreign object is caught in the tip of a sliding door, the transformer is divided into two, with the primary coil and secondary coil separated. The primary coil of the divided transformer is placed on the main body side outside the door, and the secondary coil is placed on the door side, so that they face each other in close contact with each other when the door is closed, and are separated when the door is open. and connect the foreign object sensor to the secondary coil so that the current flowing through the secondary coil is increased or decreased according to the detection result of the foreign object sensor (2 configurations), and supply power to the primary coil. Additionally, a current sensor is provided to measure the current flowing through the primary coil.

In addition, the invention according to claim 2 (hereinafter referred to as the second invention) (door jamb detection device equipped with a foreign object sensor that detects that a foreign object is caught in the tip of a sliding door) The transformer is provided with a transformer in which the length of the magnetic core in the longitudinal direction is longer than the moving distance of the door, the magnetic core and the primary coil of the transformer are arranged on the main body side outside the door, and the secondary coil of the transformer is provided. is arranged on the door side so as to move integrally with the door on the magnetic core, the foreign object sensor is connected to the secondary coil, and a current flows through the secondary coil in accordance with the detection result of the foreign object sensor. The primary coil is configured such that the current is increased or decreased, and is characterized in that it is provided with a current sensor that supplies electric power to the primary coil and measures the current flowing through the primary coil.

[Function] In the door jamming detection device of the first invention, when a large foreign object is caught in the door and the door is open, the primary coil and secondary coil of the transformer are separated, and as a result, magnetic The circuit is not configured and the current sensor installed on the primary coil side shows a large value.On the other hand, when the door is closed (the primary coil and secondary coil of the transformer are in close contact with each other, The current sensor installed on the primary coil side shows a smaller value than the value when the door is open.Furthermore, when the door is closed, the detection result of the foreign object sensor shows that a foreign object is caught. The current flowing through the secondary coil of the transformer increases or decreases depending on whether the foreign object is in the .

That is, the transformer L is divided into two, a primary coil and a secondary coil.
t. The foreign object sensor can detect whether a large foreign object that would cause the door to open is detected by determining whether or not the coils are separated from each other, and can detect even small foreign objects. It acts to magnetically transmit the results to the main body side without using an electrical movable contact. Therefore, since signals are transmitted magnetically, the signal line will not be disconnected even if there is some degree of poor adhesion between the two coils constituting the transformer.

In addition, when a foreign object is caught in the door, the current flowing in the secondary coil of the transformer increases or decreases, so the value of the current flowing in the primary coil due to mutual induction. changes, and the current sensor shows different values depending on the detection result of the foreign object sensor.

That is, by knowing the value indicated by the current sensor, it is possible to detect whether the foreign object sensor is detecting a foreign object, that is, whether a foreign object is caught in the door.

When moving the door, the secondary coil of the transformer moves over the magnetic core of the transformer together with the door, and the detection results of the foreign object sensor are transferred magnetically without using an electrical movable contact. It acts to transmit to the main body side.

Therefore, even if the movement of the door causes some play between the transformer's magnetic core and the secondary coil, which is the contact area of the signal line between the door side and the main body side, the signal line will not break. do not have.

[Embodiments] Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of the area around the door of a railway vehicle equipped with a door jamming detection device as an embodiment of the first invention.

As shown in the figure, two doors 5 and 7, which serve as both-side sliding doors, are suspended via pulleys 9 from a door hanging rail 3 fixed to the vehicle body. 7 is adapted to move the hanging rail 3 from side to side.

At the top of the door 5 on the left side in the figure, a fixture]1 is erected. At the tip of the fixture 11, a secondary coil 15, which will be paired with a primary coil]3, which will be described later, is fixedly installed.

On the other hand, a primary coil 13 is fixed to the vehicle body 1 via a fixture 17 so as to face the secondary coil 5.

These primary coil 13 and secondary coil 15F are shown in Fig. 2.1: A transformer 27 is a transformer 27 in which conductor wires 23°25 are wound in three places around a mouth-shaped iron core 21, and each conductor wire is divided into separate pieces. The respective positions are determined so that the doors 5 and 7 are in close contact with each other in the closed state, and are separated from each other when the doors 5 and 7 are open.

In addition, the $5.7 door has a rubber door (31.33 mm) to prevent gaps when the door is closed and to prevent fingers from getting caught.
is attached and t size is 1:% s5 on the left side of the figure
A pressure-sensitive sensor 35 is provided in the door-tip rubber 31 to detect foreign objects caught in the door-tip.
5 (Dai) It is a tape-shaped switch that turns on when a foreign object is caught and receives pressure, and turns off when no foreign object is caught. connected in series.

On the other hand, an AC power source 41 mounted on the vehicle body 1 is connected to the primary coil 13, and a current sensor 43 for measuring the value of the current flowing through the primary coil 13 is further provided in the primary circuit.

The operation of this embodiment configured as described above will be explained next.

When a large foreign object is caught between the doors 5 and 7 and the doors 5 and 7 are open, the primary coil 13 and the secondary coil 15 are separated, and as a result, a magnetic circuit is not formed and the primary coil 1
The current sensor 43 provided on the third side shows a large value 1a.

On the other hand, when the doors 5 and 7 are closed, the next coil 1
3 and the secondary coil 15 are in close contact with each other, forming the relationship shown in the electrical circuit diagram of FIG. 3, and as a result, both coils 13 and 15 constitute a magnetic circuit.

In this state, if no foreign object is caught between the doors 5 and 7, the pressure sensor 35 is turned off, so the secondary coil 1
No load current flows through the coil 5, and the current sensor 43 provided on the primary coil 13 side indicates a predetermined value 1b which is smaller than the value 1a when the door 5.7 is open.

In addition, even though the primary coil 13 and the secondary coil 15 are in close contact with each other and the doors 5 and 7 are closed, the J15
, 7, the pressure sensor 35 is turned on and a load current flows through the secondary coil 15. Then, due to the increase in the load current of the secondary coil 15, a mutual induction effect is activated and the current flowing to the primary coil 13 increases, and the current sensor 43 (Table 1) has a predetermined value larger than the value 1b when the pressure sensor 35 is off. 1c (la
(is smaller than).

Therefore, the door jamb detection device of this embodiment configured as described above (fS) detects not only large foreign objects that cause the doors 5 and 7 to open, but also large foreign objects that cause the doors 5 and 7 to open. Even small foreign objects that become closed can be detected.

Moreover, the transmission and reception of the signal of the pressure sensor 35 is performed by the primary coil]
3 and the secondary coil 15, the conventional Unlike electrical movable contacts, there is no possibility of disconnection of the signal line, and it is highly reliable.

Next, an embodiment of the second invention will be described.

The door jamming detection device of this embodiment is different from the embodiment of the first invention described above, except that the structure of the transformer which is the signal transmission part of the pressure sensor 35 is different. are exactly the same.

That is, as shown in FIG. The AC power source 41 and the current sensor 43 are fixedly connected to the primary coil 57 of the transformer 51 (above).
9], a pressure sensor 35 and a resistor 37 are connected to each other. Note that the winding portion of the secondary coil 59 (9) is fixed to the door 5 via a fixture 61, and
It is configured to move over the iron core 53 together with the iron core 53.

The operation of this embodiment configured as described above will be explained next.

If no foreign object is caught between the doors 5 and 7, the pressure sensor 35 is turned off, so no load current flows to the secondary coil 15, and the current sensor 43 provided on the primary coil 13 side Indicates a predetermined value 1d.

In addition, if a foreign object is caught between the doors 5 and 7,
Since the pressure sensor 35 is turned on, the secondary coil 15
Load current flows through. Then, the secondary coil 15
Due to the increase in the load current, mutual induction occurs and the current flowing through the primary coil 13 increases, and the current sensor 43 (component) exhibits a predetermined value 1e larger than the value 1d when the pressure sensor 35 is off.

Therefore, according to the door jamb detection device of this embodiment configured as described above, (f), from the detected value of the current sensor 43,
The detection result of the pressure sensor 35, that is, the pinching of a foreign object can be detected. In addition, since the pressure sensor 35 is configured to send and receive signals magnetically without using an electrical movable contact, the contact portion of the signal line between the door 5 side and the vehicle body 1 side is Iron core 53 and secondary coil 5 of transformer 51
Even if some play occurs between the two, the signal line will not be disconnected, and the reliability is excellent like the first protection embodiment described above.

In addition, in these embodiments, a pressure-sensitive sensor 35 that is controlled to turn on and off when a foreign object is caught is used as a foreign object sensor.
However, instead of this, a pressure-sensitive sensor whose resistance value changes linearly according to the pressure received when a foreign object is caught, such as a rubber optical fiber sensor, can be used. Also, by comparing the current value detected by the current sensor 43 with the threshold value, a foreign object can be detected, and the same effects as in these embodiments can be achieved.

Furthermore, in an embodiment of the second invention described above,
One side of the iron core on which the secondary coil 59 moves may be configured so that the cross-sectional area changes linearly from one end to the other, and it is possible to detect whether a foreign object is caught and how far the door is.

Although the embodiments of the first invention and the second invention have been described above, these inventions are not limited to these embodiments in any way, and can be used for elevator doors instead of the structure used for railway vehicle doors. It goes without saying that the present invention may be implemented in various forms without departing from the spirit of the invention, such as configurations.

As detailed above, the door jamming detection devices of the first and second inventions are suitable for detecting not only large foreign objects that would cause the door to open, but also those that would cause the door to close even if the door was caught. It is possible to detect even small foreign objects.Moreover, it is possible to reliably transmit and receive signals from the sensor section provided on the door, and the device has excellent reliability.

[Brief explanation of drawings]

Figure 1 shows a schematic configuration of the area around the door of a railway vehicle equipped with a door jamming detection device as an embodiment of the first invention. Figure 2 shows a primary coil and a secondary coil formed by a transformer. Strabismus doctor Fig. 3 shows a circuit diagram showing the electrical configuration of the door jamb detection device. Fig. 4 shows a circuit diagram around the door of a railway vehicle equipped with a door jamb detection device as an embodiment of the second invention. It is a schematic block diagram. 15.59... Secondary coil 21.53... Iron core 31.33... Door tip rubber 41... AC power supply

Claims (1)

[Claims] 1. In a door jamming detection device equipped with a foreign object sensor that detects when a foreign object is caught in the tip of a sliding door, the transformer is configured to have a primary coil and a secondary coil separated. The primary coil of the divided transformer is placed on the main body side outside the door, and the secondary coil is placed on the door side, facing each other in close contact with each other when the door is closed, and when the door is open. and the foreign object sensor is connected to the secondary coil so that the current flowing through the secondary coil is increased or decreased depending on the detection result of the foreign object sensor, and A door jamming detection device characterized by being provided with a current sensor that supplies electric power and measures the current flowing through the primary coil. 2. In a door jamming detection device equipped with a foreign object sensor that detects when a foreign object is caught in the tip of a sliding door, a transformer whose magnetic core in the longitudinal direction is longer than the moving distance of the door is used. A magnetic core and a primary coil of the transformer are arranged on the main body side outside the door, and a secondary coil of the transformer is arranged on the door side so as to move over the magnetic core integrally with the door. , the foreign object sensor is connected to the secondary coil, and the current flowing through the secondary coil is increased or decreased depending on the detection result of the foreign object sensor, and power is supplied to the primary coil, and the foreign object sensor is connected to the secondary coil. A door scissor detection device characterized by being provided with a current sensor that measures the current flowing through a coil.