JP2898275B1 - Door movement obstruction detection device - Google Patents

Abstract

An object of the present invention is to provide a door movement obstruction detecting device capable of accurately detecting that an opening / closing operation of a door is obstructed by an obstacle or the like. A receiving member is fixed to a slide door (not shown). When the door is closed, the ball screw 52 rotates to slide the door driving unit 63 in the direction indicated by the arrow 81, and the spring 7 moves from the tubular portion 62 a of the door driving unit 63 to the spring 7.
The force is transmitted to the receiving member 71 via 3 and the door is closed. The sensor 76 fixed to the door side detects a distance between the sensor 76 and the detection plate 75 fixed to the door driving unit 63 side. When closing the door,
If the movement of the door stops and only the door driving unit 63 continues to move with an obstacle or the like sandwiched therebetween, the spring 73 contracts, and the distance between the sensor 76 and the detection plate 75 becomes wider than usual.
The presence or absence of the obstruction of the closing operation can be detected based on the distance detected by 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door movement obstruction detecting device for detecting whether or not an opening / closing operation of a door is obstructed.

[0002]

2. Description of the Related Art When automatically closing various doors, it is preferable from a safety standpoint to detect that a person or luggage has been caught and stop the door closing operation. A sensor for detecting that a person or baggage has been caught by a rush ride on a train or the like is attached to a movable door provided on a platform fence that separates a train from the track side.

FIG. 10 shows an obstacle detection sensor 100 conventionally used for a movable door or the like of a platform fence.
The sensor 100 has a waterproof tape switch 102 built in an extruded rubber 101, and is usually attached to the front end of the door over the entire vertical direction.

[0004]

However, the above-mentioned obstacle detection sensor has excellent detection characteristics when a force is applied from the front of the sensor as shown by an arrow 103 in FIG. When a force is applied slightly obliquely as shown in the figure, there is a problem that the detection sensitivity is not good.

Further, when a flat surface of an obstacle comes into contact with the sensor over a large area, a large force is required to compress the rubber on the surface, and it is determined that the obstacle has been sandwiched. A great deal of force was applied to baggage and passengers before the sensor detected and the door closing operation was stopped.

Further, since caps are provided at both ends in the longitudinal direction of the sensor to protect a terminal processing portion of the cable and a terminal processing portion such as rubber, an obstacle can be detected in a portion where the cap exists. Can not. For this reason, for example, when the height of the platform fence is about 130 cm, the shoulder portion where the passenger is most likely to be caught is exactly the height of the cap portion, and it may not be possible to accurately detect that the passenger is being caught. In particular, there is a problem that it is difficult to sufficiently protect the weak, such as the physically handicapped and the elderly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to accurately detect that the opening / closing operation of the door is obstructed by an obstacle or the like. It is intended to provide an interference detection device.

[0008]

The gist of the present invention to achieve the above object lies in the following inventions. [1] In a door movement obstruction detecting device for detecting whether or not an opening / closing operation of a door (21) is obstructed, the door (21)
A door driving unit (63) that moves by receiving a force from a predetermined driving source (53) to open and close the door, and is interposed between the door driving unit (63) and the door (21). ) From the door drive unit (63) to the door (21).
And a distance detecting means (75, 76) for detecting a distance between the door driving section (63) and a predetermined portion of the door (21). The resilient connecting member (73) is provided with the door driving unit (6) when the opening and closing operation of the door (21) is not hindered.
3) The elasticity is set so that the length when moving the door and the length when moving the door driving unit (63) in a state where the opening / closing operation of the door (21) is obstructed are different. The opening / closing operation of the door (21) is obstructed based on the distance between the door driving section (63) detected by the distance detecting means (75, 76) and a predetermined portion of the door (21). A door movement obstruction detection device, which determines whether or not the door has been received.

[2] The door driving section (63) is driven by the door (2).
1) Only when the door drive unit (6) is moved in the opening direction.
The door (21) is provided with an abutting member (71) for receiving a force for opening the door (21) directly from the door drive unit (63) in contact with the door (21) [3]. A device for detecting movement of a door according to the above.

The present invention operates as follows. The door drive unit (63) moves by receiving a force from a predetermined drive source (53) to open and close the door (21). For example, in the case of the sliding door (21), the door driving unit (63)
3) Reciprocates horizontally under the force from 3). The door driving unit (63) and the door (21) are connected to each other by an elastic connecting member (7).
When the door driving unit (63) moves, a force for opening and closing the door (21) is applied to the door (21) via the connecting member (73).

At this time, if there is no obstacle obstructing the opening / closing operation of the door (21), the force applied to the connecting member (73) is reduced to a predetermined magnitude required for moving the door (21). Therefore, the amount of expansion and contraction of the elastic connecting member (73) also falls within a predetermined range. On the other hand, when an obstacle is sandwiched, the door (21) does not move with the movement of the door driving unit (63), so that a larger force is applied to the connecting member (73) than in the normal state, The amount of expansion and contraction increases.

The distance detecting means (75, 76) includes a door (2)
The distance between the predetermined position of 1) and the door driving unit (63) is detected, and the distance detected by the distance detecting means (75, 76) changes according to the amount of expansion and contraction of the connecting member (73). I do.
Therefore, it is possible to determine whether or not the opening / closing operation of the door (21) is obstructed based on the distance detected by the distance detecting means (75, 76).

In addition to the case where an obstacle is pinched when the door (21) is closed, and the case where something is pulled into the door pocket and the opening operation of the door (21) is obstructed, the connecting member ( Since 73) expands and contracts by a certain amount or more, it is possible to detect the disturbance during the opening operation based on the distance.
Further, since the connecting member (73) has elasticity, it is possible to reduce an impact applied to the obstacle when the door (21) comes into contact with the obstacle.

Further, only when the door (21) is closed, the force from the door drive section (63) is applied to the door (2) via the connecting member (73).
1), and when the door (21) is opened, an abutment member (71) provided on the door (21) side causes the door drive unit (6) to open.
The force from 3) may be directly received, and the detection function of disturbance may be activated only when the door (21) is closed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Each drawing shows an embodiment of the present invention. 2 to 4 show a door movement obstruction detection device 10.
FIG. 2 shows the movable platform fence 20 from above, and FIG. 3 shows the movable platform fence 2.
FIG. 4 shows a state where the movable platform fence 20 is viewed from the side, and FIG. The movable platform fence 20
It is erected near the end 31 of the platform 30 and separates the track side where the railway train passes from the platform side to ensure the safety of passengers waiting for the train.

The movable platform fence 20 has a sliding movable door 21 which is opened when a passenger gets on and off the train, and a door pocket 22 thereof. Further, the movable door 21 is open right and left, and its height is about 130 cm. In addition, a tip rubber 23 for impact mitigation is attached to the tip of the movable door 21.

FIGS. 5 and 6 show the interior of the door pocket 22. FIG. 5 shows the interior of the door pocket 22 from the front, and FIG. 5 shows the interior of the door pocket 22 from the side. .
An upper frame 41 and a lower frame 42 are provided in the upper part and the lower part of the inside of the door pocket 22 so as to extend horizontally over substantially the entire width of the door pocket 22. An upper guide rail 43 for guiding the movable door 21 when opening and closing is mounted on an upper surface of the upper frame 41, and a lower guide rail 44 for guiding the movable door 21 is also mounted on a lower surface of the lower frame 42. It is.

An upper door guide roller 45 meshing with the upper guide rail 43 from above the movable door 21 is provided above the movable door 21 near the end near the door pocket 22.
A lower door guide roller 46 that engages with the lower guide rail 44 from below is attached to the lower portion near the end on the second side. When these guide rollers 45 and 46 roll along the guide rails 43 and 44, the movable door 21
Is designed to smoothly slide horizontally to open and close.

On the upper surface side of the lower frame 42, a bearing 5
1, a ball screw 52 whose both ends are rotatably supported is disposed. The length of the ball screw 52 is set slightly longer than the opening / closing stroke distance of the movable door 21.
At one end of the ball screw 52, a rotating shaft of a motor 53 attached to the upper surface side of the lower frame 42 is provided with a shaft coupling 54.
Connected through.

The portion including the ball screw nut 61 engaged with the ball screw 52 applies a driving force for opening and closing to the movable door 2.
1 and an opening / closing force transmitting unit 60 having a function as a door movement obstruction detecting device 10 for detecting that the opening / closing operation of the movable door 21 is obstructed. Further, various electric parts for determining whether or not the opening / closing operation of the movable door 21 is obstructed and controlling the driving of the motor 53 based on a signal from the door movement obstruction detection device 10 are provided inside the door pocket 22. Is mounted on the control panel 90. The sensor unit of the door movement obstruction detection device 10 and the control panel 90 are connected by a sensor lead wire 91. In addition, the control panel 90 and the motor 53 are electrically wired by a cable (not shown).

FIGS. 1 and 7 to 9 show an opening / closing force transmitting section 60 having a function as a door movement obstruction detecting device 10. FIG. 1 shows the opening / closing force transmitting section 60 from the front, FIG. 7 shows the side view from the top rubber 23 side of the movable door 21, and FIG.

The opening / closing force transmitting section 60 includes a ball screw nut 61 which meshes with the ball screw 52, and a ball screw nut 61.
A door driving unit 63 composed of a metal fitting 62 extending from the movable door 21, a receiving tool 71 fixed to the movable door 21 side, and a slide shaft 72.
, A spring 73 as a connecting member having elasticity, a stopper 74, a detection plate 75, a sensor 76, and a slide shaft 7.
Nuts 77a, 77 for fixing 2 and the like to the receiving member 71
b. In the figure, the arrow 81 indicates the direction in which the door 21 closes.

The metal fitting 62 constituting the door driving part 63 has a cylindrical part 62a parallel to the ball screw 52 at the tip. The bearing 71 has a bearing hole for supporting the slide shaft 72 in parallel with the ball screw 52. The slide shaft 72 is fixed to the receiving member 71 by a nut 77a with one end thereof being slightly passed through the bearing hole from the side of the movable door 21 where the rubber tip 23 is located.

Further, after the cylindrical portion 62a of the metal fitting 62 and the spring 73 are passed through the slide shaft 72 from the side where the tip rubber 23 of the movable door 21 is located in this order, the nut 77b is stopped, and the nut 77b and the bearing hole are formed. The cylindrical part 62a and the spring 73 are assembled between the peripheral part and the receiving member 71. In such a state, the spring 73 is compressed to some extent, and the cylindrical portion 62a is received with a force slightly larger than the force required to close the movable door 21 in a state where the spring 73 is not obstructed by an obstacle or the like. The spring constant is set so as to press against the nut 77a).

A sensor 76 is attached to the receiver 71, and a detection plate 75 is attached to the cylindrical portion 62a so as to face the sensor 76. The sensor 76 includes a detection plate 75
In this case, a proximity sensor for detecting whether or not the distance is substantially zero is used. Note that FIG. 8 shows a side surface with the bearing 51 removed, and FIG. 9 is a view from the same direction as FIG.
The side surface of the opening / closing force transmission unit 60 with the spring 73, the nut 77b, the bearing 51, and the like removed is shown.

Next, the operation will be described. In a stop state in which the movable door 21 is not opened and closed, the cylindrical portion 62a is pressed against the receiving member 71 by the spring 73, and the distance 82 between the sensor 76 and the detection plate 75 is a predetermined minimum distance (here, approximately State).

When closing the movable door 21, the ball screw 52 is rotated in a predetermined direction by the motor 53,
3 is the exit side of the door pocket 22 (the direction indicated by the arrow 81 in FIG. 1).
Go to As a result, the cylindrical portion 62a pushes the spring 73 in the direction of arrow 81, and the force is applied to the spring 73, the nut 77b,
The movable door 21 moves in the closing direction 81 by being transmitted to the slide shaft 72, the nut 77a, and the receiving member 71.

The spring 73 presses the cylindrical portion 62a against the receiving member 71 with a force slightly larger than the force required to close the movable door 21 without being obstructed by an obstacle or the like. When closing the door, if no obstruction such as pinching of a person or baggage is received, the movable door 21 closes without the spring 73 bending. Therefore, the distance between the sensor 76 and the detection plate 75 is maintained at a predetermined minimum distance.

On the other hand, if the movable door 21 does not move in the closing direction and only the door driving unit 63 moves in the closing direction if the movable door 21 is obstructed by a person or baggage during the closing operation, the spring 7
3 exerts a greater force than usual. As a result, the spring 73 bends by several millimeters, and the space between the detection plate 75 and the sensor 76 becomes wider than the minimum distance.

When the sensor 76 detects that the distance 82 between the detection plate 75 and the sensor 76 is larger than the minimum distance, the control panel 90 stops the closing operation of the movable door 21 and Move in the opening direction to ensure safety.

When the movable door 21 is opened, the cylindrical portion 6 is opened.
The receiving member 71 is pushed by 2a, and the force for opening the movable door 21 is directly transmitted from the door driving portion 63 to the receiving member 71 without the intervention of the spring 73. That is,
The receiving member 71 functions as an abutting member that receives the door driving unit that moves in the opening direction.

As described above, whether or not the closing operation of the movable door 21 has been hindered is determined by the distance between the detection plate 75 and the sensor 76,
That is, since the detection is performed based on the distance between the door driving unit 63 and the predetermined position of the movable door 21, any method including the case where the person or the baggage is obliquely inserted or the upper end portion of the movable door 21 is inserted can be used. Even if obstacles are sandwiched in a proper state, these can be detected accurately.

Further, since the force from the door driving unit 63 is transmitted to the movable door 21 via the spring 73, when the movable door 21 hits a person or baggage during the closing operation, the spring 73 is closed.
Absorbs the impact force and reduces the impact on people and baggage.

In the embodiment described above, the rotary motion of the motor 53 is converted into a reciprocating motion by the ball screw 52 and the ball screw nut 61 to move the door driving unit 63 to open and close the movable door 21. The door driving unit 63 may be moved by a drive, a hydraulic or pneumatic cylinder, a link type, or the like. The door does not have to be a sliding door.

Further, in the embodiment, the proximity sensor is used as the sensor 76, but a limit switch for detecting that the detection plate 75 or the like is separated by a certain distance or more may be used. Further, in addition to measuring whether or not the detection plate 75 and the sensor 76 are substantially in contact with each other, the distance to the detection plate 75 may be measured using an optical sensor, an ultrasonic sensor, or the like. Good. That is, if the distance between the predetermined position of the door and the door driving unit 63 falls within a predetermined allowable range, it is determined that no interference has occurred, and if the distance exceeds this allowable range, it is determined that interference has occurred. What should I do?

In the embodiment, the spring 73 is set to be contracted for the first time when it is disturbed. However, a spring which contracts to a certain length without being disturbed is used. You may make it detect.

In addition, in the embodiment, the force is transmitted from the door driving unit 63 to the movable door 21 via the spring 73 only when the movable door 21 is closed. The force may be transmitted through a connecting member having elasticity such as a spring. For example, one end of the spring 73 is fixed to the nut 77b, and the other end is fixed to the cylindrical portion 62a, the slide shaft 72 is lengthened, and the cylindrical portion 62a is stopped.
And the receiving tool 71 do not come into contact with each other. The spring 73 is set such that the spring 73 contracts when obstructed when closing the movable door 21 and expands when obstructed when the movable door 21 is opened.

Accordingly, the distance between the door driving unit 63 and the predetermined position of the movable door 21 is reduced based on whether the distance exceeds a predetermined allowable value or conversely, is increased based on whether the distance exceeds the allowable value. , It is possible to detect both the disturbance in the closing operation and the disturbance in the opening operation. For example, if a hand is caught in the gap between the movable door 21 and the door pocket 22 when the movable door 21 is opened, the spring becomes longer than the allowable value, and this is detected, and the opening operation of the movable door 21 is stopped. can do.

[0039]

According to the door movement obstruction detection device of the present invention, the force from the door drive unit moving to open and close the door is transmitted to the door via the elastic connecting member. Since it is determined whether or not the opening / closing operation has been interrupted based on the distance between the predetermined position of the door and the door driving unit, even if an obstacle such as a person or baggage is sandwiched in any state, These disturbances can be accurately detected.

Further, since the force from the door drive unit is transmitted to the movable door via the elastic connecting member, when the door collides with a person or baggage during the closing operation, the door is moved to these persons or the like. The applied shock can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a door movement obstruction detection device according to an embodiment of the present invention.

FIG. 2 is a top view showing a movable platform fence to which the door movement obstruction detection device according to one embodiment of the present invention is applied.

FIG. 3 is a front view showing a movable platform fence to which the door movement obstruction detection device according to one embodiment of the present invention is applied.

FIG. 4 is a side view showing a movable platform fence to which the door movement obstruction detection device according to one embodiment of the present invention is applied.

FIG. 5 is an explanatory diagram showing an internal structure of a door pocket of a movable platform fence to which the door movement obstruction detection device according to one embodiment of the present invention is applied.

FIG. 6 is a side view showing the inside of the door pocket.

FIG. 7 is a top view showing a door movement obstruction detection device according to one embodiment of the present invention.

FIG. 8 is a side view showing a door movement obstruction detection device according to one embodiment of the present invention.

FIG. 9 is a side view showing a partially disassembled state of the door movement obstruction detection device according to one embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a conventionally used door stop sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Door movement obstruction detection device 20 ... Movable platform fence 21 ... Movable door 22 ... Door pocket 23 ... Tip rubber 30 ... Platform 41 ... Upper frame 42 ... Lower frame 43 ... Upper guide rail 44 ... Lower guide rail 45 ... Upper door guide Roller 46: Lower door guide roller 51: Bearing 52: Ball screw 53: Motor 54: Shaft coupling 60: Opening / closing force transmitting section 61: Ball screw nut 62: Metal fitting 62a: Cylindrical section 63: Door driving section 71: Receiver 72: Slide Shaft 73: Spring 74: Stopper 75: Detection plate 76: Sensor 77a, 77b: Nut 81: Door closing direction 82: Detection distance 90: Control panel 91: Sensor lead wire

Claims (2)

(57) [Claims] 1. A door movement obstruction detecting device for detecting whether or not an opening / closing operation of a door is obstructed, comprising: a door driving section moving by receiving a force from a predetermined driving source to open and close the door; A resilient connecting member interposed between the door drive unit and the door to transmit a force for opening and closing the door from the door drive unit to the door; and a predetermined portion of the door drive unit and the door. And a distance detecting means for detecting a distance between the door driving unit and the elastic connecting member, the length when the door driving unit is moved in a state where the opening and closing operation of the door is not hindered, and The elasticity is set so that the length of the door drive unit when the door drive unit is moved in a state where the opening and closing operation of the door is obstructed is different, and the door drive unit and the door detected by the distance detection unit The opening and closing operation of the door is obstructed based on the distance between Mobile interference detecting device of the door, characterized in that to determine whether. 2. The abutment member, which contacts the door drive unit only when the door drive unit moves in a direction to open the door and receives a force for opening the door directly from the door drive unit, The door movement obstruction detection device according to claim 1, wherein: