JP3443524B2 - Door electric switchgear - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric door opening / closing device for opening / closing doors such as an entrance / exit of a train in which all doors can be manually opened in an emergency.

[0002]

2. Description of the Related Art Conventionally, the door of a train entrance / exit has been driven to open and close by an air cylinder that reciprocates with compressed air supplied from an air pressure source through a pipe. In an emergency, the passenger opens the emergency cock of the vehicle or the conductor opens the emergency cock of the conductor's compartment to release the compressed air from the air cylinders on the door-closing side of all the doors on one side of the vehicle to the atmosphere to close the door. The disappearance of the force allowed passengers to open each door manually and escape to the outside of the vehicle. However, in such a pneumatic door opening / closing device, since the working fluid is air, a sealing structure is required in each part. Further, there is a problem that the viscosity of the seal lubricating oil changes due to the change of the temperature in summer and winter, and the opening / closing speed of the door changes. Further, if the piping or the air tank is damaged for some reason, compressed air escapes from the air cylinder, the door loses the door closing force, and passengers may fall.

[0003]

On the other hand, in European countries where the safety of passengers is prioritized, a door opening / closing device for opening / closing a door by a microcomputer-controlled electric motor is prevalent. Such an electric door opening / closing device has a screw shaft horizontally arranged at the upper edge of the entrance / exit, and a feed nut is screwed into the screw shaft. It is opened and closed by. At the other end of the screw shaft is provided an electromagnetic lock device that locks the screw shaft immovably by de-energizing and unlocks it by energizing. In an emergency, the door can be opened manually by pushing the lock release button of this electromagnetic lock device with the tip of the wire moved by the emergency handle to unlock the screw shaft. However, in the above-mentioned electric door opening / closing device in Europe, since the wire is moved by the emergency handle and the lock release button of the electromagnetic lock device is pressed, it takes a lot of time and effort to stretch the wire and adjust the operation, and it is necessary to manually operate the wire. The door that can be opened with one handle is one or two
There is a problem that it is limited to one. Japanese commuter cars have 3 to 6 doors on one side, so it is not possible to unlock all the doors on one side of the train at once in an emergency like a conventional pneumatic emergency opening device, so as a railway company, There was a problem that a wire type vehicle could not be operated in the same way as a conventional vehicle.

Therefore, an object of the present invention is to easily bring a large number of doors together in an emergency in the same manner as a conventional pneumatic emergency opening device while taking advantage of various advantages such as safety of an electric door opening / closing device. It is to provide an inexpensive door electric opening / closing device that can be opened.

[0005]

In order to achieve the above object, the invention of claim 1 is a forward and reverse rotation of a motor in which a door suspended from a feed nut screwed to a screw shaft is connected to one end of the screw shaft. In an electric door opening / closing device that opens and closes by means of an electromagnetic lock that locks the other end of the screw shaft when not energized, unlocks the other end when energized, and unlocks the lock by activating the emergency unlocking part. A locking device,
An air cylinder for activating the emergency unlocking portion of the electromagnetic lock device and an air supply pipe connecting the air cylinder and the air pressure source are provided so as to switch and communicate the air cylinder with the air pressure source and the atmosphere. It is characterized by having an opening and closing cock.

In the electric door opening / closing device, a screw shaft is screwed into a feed nut that suspends the door, and a motor for forward and reverse rotation is connected to one end of the screw shaft, while the other end of the screw shaft is connected to an electromagnetic The lock device has a fail-safe structure that locks when not energized, unlocks when energized, and prevents the door from being opened manually by locking the screw shaft when de-energized. Now, in the event of a power failure in an emergency, the screw shaft is locked by the electromagnetic locking device, and the door cannot be opened manually. If the air cylinder is of a type that unlocks by supplying compressed air,
When the open / close cock is opened and compressed air is supplied to the air cylinder from the air pressure source through the air supply pipe, this air cylinder
The emergency lock release portion of the electromagnetic lock device is activated to release the lock of the screw shaft. This allows a person to manually open the door and evacuate through the open door. Also, in the case of the type where the air cylinder is unlocked by opening to the atmosphere, by switching the open / close cock so that the air cylinder communicates with the atmosphere, the return force of the spring in the air cylinder causes the electromagnetic lock device to screw. The axle can be unlocked as well, and a person can open the door manually to evacuate. Both the compressed air supply type and the atmospheric release type have a cock that can release all the doors on one side of one vehicle and a cock that can release individual doors. in this way,
Unlike the pneumatic door opening / closing device, the door opening / closing device does not fluctuate in opening / closing speed due to temperature changes, has excellent safety, is easy to maintain without a pneumatic seal member, and has been widely used in trains and the like. Since the emergency forced opening system similar to the pneumatic type has been applied, emergency evacuation at power failure can be secured at low cost and with good operability.

According to another aspect of the present invention, there is provided an electric door opening / closing device in which the inner ring is fixed to the other end of the screw shaft, and only the rotational force of the screw shaft in the door opening direction is transmitted to the outer ring, and the electromagnetic lock device is connected to the outer ring. It is characterized by including a one-way clutch that locks and unlocks the screw shaft separately.

In the above electric door opening / closing device, a one-way clutch is provided between the other end of the screw shaft and the electromagnetic lock device so that only the rotational force of the screw shaft in the door opening direction is transmitted to the electromagnetic lock device. Therefore, when the screw shaft, that is, the inner ring is rotated by the motor, the rotation in the door closing direction is not transmitted to the outer ring, that is, the electromagnetic lock device side. While the door is driven to close, the rotation in the door opening direction is transmitted to the electromagnetic lock side, so that the door is driven to open only when the electromagnetic lock device is unlocked by energization. For the same reason, the door can be closed by hand regardless of whether the electromagnetic lock device is locked or unlocked, and the door can be opened by hand only when the electromagnetic lock device is unlocked. That is, thanks to the one-way clutch above, the door can never be opened manually. However, in the event of a power failure, the electromagnetic locking device unlocks the screw shaft and allows you to manually open the door,
In addition to being excellent in safety, the door can be driven to open by unlocking the screw shaft by energizing the electromagnetic lock device when an object is caught when the door is driven to close, which is excellent in convenience.

According to a third aspect of the present invention, there is provided an electric door opening / closing device, wherein a plurality of doors are respectively provided with the electromagnetic lock device, the air cylinder and the opening / closing cock, and one inlet port is used as the opening / closing cock and the other inlet port is used as the pneumatic pressure. The source is provided with a plurality of switching valves whose outlet ports are connected to the air cylinders, the outlet ports communicating with the inlet ports on the high-pressure side or the low-pressure side, and the other inlet ports of these switching valves are connected to the air pressure source. At least one integrated opening / closing cock is provided in the collective air supply pipe.

In the door electric opening / closing device, an electromagnetic lock device for locking the other end of the screw shaft to a plurality of doors and an air cylinder for activating the emergency unlocking portion are provided respectively. From the outlet port of the switching valve, through one inlet port, through each opening and closing cock to the air pressure source,
In addition, the outlet ports are connected to the air pressure sources through the other inlet port and the collective air supply pipe having the integrated opening / closing cock. When each of the switching valves is of a type in which the outlet port communicates with the high-pressure side inlet port, and each of the air cylinders is of the type that unlocks by the supply of compressed air, the switching valve is set to the pneumatic When it is switched to communicate with the power source, compressed air is supplied to the air cylinder via one of the inlet port and outlet port of the switching valve, and one of the air cylinders is connected to one of the electromagnetic lock devices in the emergency unlocking section. To unlock the screw shaft. Therefore, even if the electromagnetic lock device is locked due to a power failure, the lock will be released, so if you push the door open by hand, the screw shaft can rotate freely and you must open either door by hand to evacuate. You can When the integrated opening / closing cock is switched to communicate with the air pressure source, compressed air is supplied to all air cylinders on one side through the other inlet port and outlet port of all switching valves on one side of the vehicle.
All the electromagnetic lock devices on one side unlock the screw shafts, so that even in the event of a power failure, all doors on one side can be opened by hand to evacuate.

In the case where each of the switching valves is of a type in which the outlet port communicates with the low pressure side inlet port, and each of the air cylinders is of the type in which the lock release operation is performed by opening to the atmosphere, any one of the opening / closing cocks Or if you switch the integrated open / close cock so that the air cylinder side communicates with the atmosphere,
The air cylinders belonging to the open / close cock or all the air cylinders on one side are released to the atmosphere, and the electromagnetic lock device unlocks the screw shaft or all the electromagnetic shafts on one side, respectively. Even in the event of a power failure, you can evacuate by manually opening that door or all doors on one side. As described above, in the above-mentioned door electric opening / closing device, since the pneumatic emergency opening system that has been widely used for trains and the like has been applied, the conductor can easily take the same measures as a conventional train in an emergency. In addition, a large number of doors can be opened all at once, and can be applied more easily and cheaply than wire-type lock release devices.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is an overall view showing an example of an electric door opening / closing device according to claim 3, wherein the door electric opening / closing device is provided on the upper edge of each entrance / exit of a train, and from the center to the left with a left screw 1a, On the right side, the screw shafts 1 provided with the right-hand screws 1b are arranged horizontally, and the left-hand feed nut 2a screwed on the left-hand side.
And the left-hand feed nut 2b screwed to the right,
The right doors 3a and 3b are respectively hung, and the doors 3a and 3b are rotated by the forward and reverse rotation of a motor (not shown) connected to the right end of the screw shaft 1.
It is designed to open and close. An inner ring is fixed to the left end of each screw shaft 1, and the screw shaft 1 is placed between the inner ring and the outer ring.
One-way clutch (not shown) fitted with a sprag that transmits only the rotational force in the door opening direction to the outer ring, and the outer ring of this one-way clutch is pressed into contact when not energized to lock, and separated from the outer ring when energized. And an electromagnetic lock device 4 for releasing the lock by depressing the emergency lock release button 4a at the left end.

On the left side of each electromagnetic lock device 4, there is provided an air cylinder 6 for pushing down the lock release button 4a of the electromagnetic lock device 4 by the projection of the piston rod 6b biased in the retracting direction by the spring 6a. The cylinder chamber 6c of the air cylinder 6 is connected to an outlet port C of a shuttle valve 7 as a switching valve, and one inlet port A of this shuttle valve 7 is connected.
Is connected to an air supply main 10 connected to an air pressure source (not shown) through each air supply branch pipe 9 provided with an opening / closing cock 8, while the other inlet ports B of all the shuttle valves 7 are supplied with air. It is connected to a collective air supply pipe 11 branching from the main pipe 10.
Two shuttle valves 12, 13 are provided on the side of the main air supply pipe 10 of the collective air supply pipe 11, and the shuttle valve 12 has an outlet port C for the collective air supply pipe 11 and one inlet port A.
Is connected to the main air supply pipe 10 via a pipe 15 provided with a common emergency cock 14 in the vehicle, and the other inlet port B is connected to an outlet port C of a shuttle valve 13 via a pipe 16. Further, the shuttle valve 13 has one inlet port A passing through a pipe 18 having an exterior cock 17 interposed, and the other inlet port B.
Piping 20 with a common emergency cock 19 in the crew cabin
And are connected to the air supply mains 10, respectively.

All of the shuttle valves 7, 12, 13 are such that the outlet port C communicates with the high pressure side of the inlet ports A, B, and the pipes 15, 16, 18, 20 connect the air supply pipe 10 to each other. Since it is connected to the collective air supply pipe 11 via the shuttle valves 12 and 13, any one of the common emergency cock 14, the exterior cock 17, and the common emergency cock 19 provided on the pipes 15, 18 and 20 can be used. Even when opened, each air cylinder 6 is operated by the compressed air that passes through the other inlet port B and the other outlet port C of each shuttle valve 7 from the collective air supply pipe 11, so that each becomes an integrated open / close cock. On the other hand, the opening / closing cock 8 provided in each air supply branch pipe 9 individually operates only the air cylinder 6 at that location by opening. In a vehicle without a crew room, the pipe 20 having the shuttle valve 13 and the common emergency cock 19 is omitted, and the pipe 1 having the exterior cock 17 is provided.
The downstream side of 8 is directly connected to the pipe 16.

3 (A) and 3 (B) show the opened / closed states of all the above-mentioned opening / closing cocks represented by the opening / closing cock 8. 3A shows a closed position in which the air cylinder side 8b is disconnected from the air pressure source side 8a and is open to the atmosphere, and FIG. 3B shows the air cylinder side 8b communicated with the air pressure source side 8a. The open positions are shown respectively.

The operation of the electric door opening / closing device having the above structure will be described below with reference to FIG. First, the normal opening / closing operation of the doors 3a, 3b by the electromagnetic lock device 4 incorporating the motor (not shown) at the right end of the screw shaft 1 and the one-way clutch at the left end is as follows. Rotate the motor forward and close the doors 3a, 3b
When opening, the one-way clutch built in the electromagnetic lock device 4 transmits the normal rotation of the inner ring externally fitted and fixed to the screw shaft 1 to the outer ring by the sprag, so that the electromagnetic lock device 4 releases the lock of the outer ring by energization. Left screw 1a, only when
The screw shaft 1 having the right-hand screw 1b rotates in the forward direction, and opens the doors 3a, 3b via the left-hand screw and the right-hand screw feed nuts 2a, 2b so as to be separated from each other. Therefore, when the electromagnetic lock device 4 is in a non-energized normal condition or during a power failure, the outer ring is locked and the doors 3a, 3b cannot be opened by hand, so that power consumption can be suppressed and fail safety can be improved. Further, when an object or a person is caught when the door is closed, the motor can be opened and opened by energizing the electromagnetic lock device 4 to unlock the outer ring. Station staff no longer need to push the door open with mighty force. When reversing the motor and closing the doors 3a and 3b, the sprag of the one-way clutch is
Since the reverse rotation of the screw shaft 1 is not transmitted to the outer ring, the screw shaft 1 freely rotates reversely regardless of whether the electromagnetic lock device 4 locks the outer ring when not energized or unlocks the outer ring when energized. 3a and 3b can be manually closed or driven by a motor.

Next, the electromagnetic lock device 4 at the left end of the screw shaft 1
The operation of pressing the emergency lock release button 4a with the air cylinder 6 to open the doors 3a and 3b is as follows. From the closed position in FIG. 3 (A), one of the opening / closing cocks 14, 17, and 19 provided on the pipes 15, 18, and 20 extending from the air supply main 10 connected to the air pressure source (not shown) to the collective air supply pipe 11 is shown. Switch to the open position shown in 3 (B). Then, in the case of the common opening / closing cock 14 in the vehicle, it goes through the inlet port A and the outlet port C of the shuttle valve 12, and in the case of the outside cock 17, the inlet port A, the outlet port C of the shuttle valve 13, the pipe 16, the shuttle valve. In the case of the common opening / closing cock 19 in the passenger compartment through the inlet port B and the outlet port C of 12, the inlet port B and the outlet port C of the shuttle valve 13, the pipe 16, the inlet port B and the outlet port C of the shuttle valve 12 are connected. After that, compressed air is supplied to the collective air supply pipe 11, and the compressed air is supplied to the inlet port B and the outlet port C of the shuttle valve 7 of each door.
Enters the cylinder chamber 6c of each air cylinder 6 and causes the piston rod 6b to project against the spring 6a. As a result, the emergency lock release buttons 4a of all the electromagnetic lock devices 4 on one side are pressed, and the lock of each screw shaft 1 by the electromagnetic lock devices 4 is released. Therefore, which door 3a
Even if 3b is opened by hand, the screw shaft 1 freely rotates through the feed nuts 2a and 2b, so that passengers can immediately evacuate to the outside through the open doors 3a and 3b. Further, even if all the electromagnetic locking devices 4 keep the screw shaft 1 locked due to a power failure due to an accident or the like, simply opening one of the opening / closing cocks 14, 17 and 19 causes the compressed air in the air cylinder 6 to be removed. All locks can be released by operation, so it is highly safe.

On the other hand, when the opening / closing cock 8 of the air supply branch pipe 9 provided for each door is switched from the open position shown in FIG. 3 (A) to the open position shown in FIG. 3 (B), the inlet port A and the outlet of the shuttle valve 7 of the door are switched. Compressed air is supplied to only the cylinder chamber 6c of the air cylinder 6 through the port C. Therefore, the operation of the air cylinder 6 unlocks only the electromagnetic lock device 4, and the passenger can open the doors 3a and 3b by hand to evacuate to the outside. Thus, in the electric door opening / closing device, the screw shaft 1
One-way clutch is built in the other end of the screw shaft 1 to open / close the doors 3a, 3b via the feed nuts 2a, 2b by rotating one end of the motor forward / reversely and to transmit only the rotational force in the door opening direction to the outer ring. Since the electromagnetic lock device 4 that locks the outer ring when not energized and has the emergency lock release button 4a is provided, the opening and closing speed does not fluctuate due to changes in temperature unlike the pneumatic type opening and closing device, and the door can be opened during a power failure. Since it does not open, it is fail-safe and excellent in safety, and when the door is pinched, the electromagnetic lock device can be unlocked by energizing, the motor can be rotated in the forward direction to drive the door open, and the door can be pushed open with powerful force. There is no need, and the motor as the door driving means has the advantage that it is easy to maintain because the wear member is only a brush and the wear member is much smaller than the pneumatic switchgear that has parts such as packing and piston cylinder. is there. In addition, since the emergency unlock button 4a is pressed by a pneumatic air cylinder that has been widely used in the past, it is easy and inexpensive to apply, and many doors can be opened all at once in the event of a power failure. .

In FIG. 2, the handle of the open / close cock of FIG. 1 is shifted in phase by 90 °, and the shuttle valve 7 of FIG. 1 is used as a switching valve 27 of the type in which the outlet port communicates with the low pressure side inlet port. Another embodiment of the electric door opening / closing device in which the cylinder 6 is an air cylinder 26 of a type in which the piston rod projects when it is opened to the atmosphere is shown. Therefore, FIG.
The same members as those described above are designated by the same reference numerals and the description thereof will be omitted. Figure 4
In the open / close cocks 28, 34, 37, 39 of FIG. 2 represented by the open / close cock 28 shown in FIG. 4, the air cylinder side 28b is disconnected from the air pressure source 28a side in the closed position of FIG. 4 (A). It is open to the atmosphere and at the open position in Fig. 4 (B), the air cylinder side 2
8b is connected to the air pressure source side 28a. Therefore, the open / close cocks 28, 34, 37, 39 in FIG. 2 are all in the open position where compressed air from the air supply main 10 is passed to the air cylinder side.

2 represented by the switching valve 27 shown in FIG.
Of the switching valves 27, 32, 33 of the inlet ports A, B at both ends,
A valve body 27b is slidably fitted in a valve chamber 27a provided with an outlet port C at the center, and the valve body 27b slides by the air pressure of an inlet port (A in this example) on the high pressure side. Then, the high pressure side valve seat is seated, and the low pressure side inlet port (B in this example) communicates with the outlet port C. The air cylinder 26 causes the piston rod 26b, which is biased by the spring 26a in the projecting direction, to project when the rod chamber 26c is opened to the atmosphere to press the lock release button 4a of the electromagnetic lock device 4, while the rod chamber 26c is pressed. Compressed air is supplied to 26c so as to be immersed therein.

In the embodiment of FIG. 2, the air cylinder 26
However, when the rod chamber 26c is opened to the atmosphere, the piston rod 2
6b protrudes, and the switching valves 27, 32, 33 are connected to the outlet port C.
Is a pipe similar to that of FIG. 1 except that is communicated with the low pressure side inlet port A or B. Therefore, one of the opening / closing cocks 34, 37, 39 provided on the pipes 15, 18, 20 extending from the main air supply pipe 10 to the collective air supply pipe 11 is changed from the open position shown in FIG. ) To open the air cylinder side 28b to the atmosphere, the inlet port A of the switching valve 32, the inlet port A of the switching valve 33 and the inlet port B of the switching valve 32, and the inlet port B of the switching valve 33 are changed. The rod chamber 26 of the air cylinder 26 of each door passes through either the inlet port B of the switching valve 32 and the outlet port C of the switching valve 27 of each door that is connected to the outlet port C of the switching valve 32.
Since c is released to the atmosphere, the piston rod 26b is projected by the urging force of the spring 26a, and the emergency lock release buttons 4a of all the electromagnetic lock devices 4 are pushed down, so that the electromagnetic lock devices 4 can lock the screw shafts 1 of the respective screw shafts 1. The lock is released.

On the other hand, when the opening / closing cock 28 of the air supply branch pipe 9 provided for each door is switched from the open position of FIG. 4 (B) to the closed position of FIG. 4 (A) to open the air cylinder side 28b to the atmosphere,
Since only the rod chamber 26c of the air cylinder 26 is opened to the atmosphere through the inlet port A and the outlet port C of the door switching valve 27, only the lock of the electromagnetic lock device 4 is released. Therefore, also in the embodiment of FIG. 2, the same operation and effect as those described in paragraphs “0017” and “0018” of FIG. 1 can be obtained.

The electric door opening / closing device of the present invention is not limited to the electric train door of the above-mentioned embodiment, but can be applied to other doors.

[0024]

As is apparent from the above description, claim 1
The invention of, in a door electric opening / closing device for opening and closing a door suspended by a feed nut screwed to a screw shaft by forward / reverse rotation of a motor connected to one end of the screw shaft, wherein the other end of the screw shaft is opened when not energized. An electromagnetic lock device that locks and unlocks the other end when energized, and that unlocks when the emergency lock release part is activated, and the air that operates the emergency lock release part of the electromagnetic lock device. Since the cylinder and the air supply pipe connecting this air cylinder and the air pressure source are provided with an opening and closing cock that is provided so as to switch and communicate the air cylinder with the air pressure source and the atmosphere, the door opening and closing drive is pneumatically operated. Since it does not use a motor, it does not fluctuate in opening and closing speed due to temperature changes, has excellent safety, has few wear parts, and is easy to maintain. Since using air pressure system in an emergency open, allowing emergency the door manual opening comprising power failure with at a lower cost than good operability and wire type or the like.

According to another aspect of the present invention, in the electric door opening / closing device, the inner ring is fixed to the other end of the screw shaft, and only the rotational force of the screw shaft in the door opening direction is transmitted to the outer ring, and the electromagnetic lock device is connected to the outer ring. Since it is equipped with a one-way clutch that locks and unlocks the screw shaft separately, the outer ring is locked and the door cannot be opened by hand during normal non-energization or during a power failure. It is possible to improve safety while suppressing it, and when an object is pinched when the door is closed, the lock can be released by energizing and the motor can open and drive it, eliminating the need to push the door open with a powerful force of human convenience. Excellent in.

According to another aspect of the present invention, there is provided an electric door opening / closing device, wherein each of a plurality of doors is provided with the electromagnetic lock device, the air cylinder and the opening / closing cock, and one inlet port is the opening / closing cock and the other inlet port is the pneumatic pressure. The source is provided with a plurality of switching valves whose outlet ports are connected to the air cylinders, the outlet ports communicating with the inlet ports on the high-pressure side or the low-pressure side, and the other inlet ports of these switching valves are connected to the air pressure source. Since at least one integrated opening / closing cock is provided in the collective air supply pipe, the introduction of the pneumatic emergency open system that has been widely used in trains and the like has made it possible to easily install many by simply taking the conventional emergency measures. The doors can be opened all at once, and moreover, it can be applied more easily and at a lower cost than a lock release device such as a wire type.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of an electric door opening / closing device according to claim 3.

FIG. 2 is an overall view showing another embodiment of the electric door opening / closing device.

FIG. 3 is a diagram showing an open / closed position of the opening / closing cock of FIG. 1.

FIG. 4 is a diagram showing open and closed positions of the opening / closing cock of FIG.

5 is a diagram showing details of the switching valve in FIG. 2. FIG.

[Explanation of symbols]

1 ... Screw shaft, 2a, 2b ... Feed nut, 3a, 3b ... Door, 4
... electromagnetic lock device, 4a ... emergency release button, 6 ... air cylinder, 6a ... spring, 6b ... piston rod, 6c ... cylinder chamber, 7, 12, 13 ... shuttle valve, 9 ... air supply branch pipe,
10 ... Air supply main, 11 ... Collective air supply piping, 8, 14, 17,
19,28,34,37,39 ... Opening / closing cock, 15,16,1
8, 20 ... Piping, 27, 32, 33 ... Switching valve, A ... One inlet port, B ... Other inlet port, C ... Outlet port.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-7-186946 (JP, A) JP-A-6-263030 (JP, A) JP-A-9-301160 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) E05F 15/14 B61D 19/02

Claims (3)

(57) [Claims] 1. An electric door opening / closing device for opening and closing a door suspended by a feed nut screwed to a screw shaft by forward / reverse rotation of a motor connected to one end of the screw shaft, wherein the other end of the screw shaft is not energized. And an electromagnetic lock device that unlocks the other end of the electromagnetic lock device when the power is energized and the emergency lock release part is activated, and the emergency lock release part of the electromagnetic lock device is activated. An electric door opening / closing device, characterized in that an air cylinder and an air supply pipe connecting the air cylinder and an air pressure source are provided with an opening / closing cock provided so as to switch and communicate the air cylinder with the air pressure source and the atmosphere. . 2. The door electric opening / closing device according to claim 1, wherein an inner ring is fixed to the other end of the screw shaft, and only the rotational force of the screw shaft in the door opening direction is transmitted to the outer ring, and the electromagnetic force is applied to the outer ring. An electric door opening / closing device having a one-way clutch that locks and unlocks a screw shaft by connecting and separating a locking device. 3. The door electric opening / closing device according to claim 1 or 2, wherein each of the plurality of doors is provided with the electromagnetic lock device, the air cylinder and the opening / closing cock, and one inlet port is provided to the opening / closing cock and the other is provided. Is connected to the air pressure source, the outlet port is connected to the air cylinder, the outlet port is provided with a plurality of switching valves communicating with the inlet port on the high pressure side or the low pressure side, and the other inlet port of these switching valves. An electric door opening / closing device, wherein at least one integrated opening / closing cock is provided in a collective air supply pipe connecting the air pressure source.