JP3091169B2 - Door opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door opening / closing apparatus for closing a part to be opened / closed, such as a constant temperature room such as a refrigerator, an airtight room such as a clean room, and the like, which is an entrance of a building.

[0002]

2. Description of the Related Art Conventionally, as a door opening / closing device of this type, for example, as described in Japanese Patent Publication No. 8-6580, a rail is provided above an opening which is an entrance and exit of a constant temperature room such as a refrigerator. The door is suspended and supported by a hanging wheel that rolls this rail, and the gears rotated by the motor provided on this door are engaged with a chain stretched along the rail to drive the motor forward and reverse. The structure that opens and closes the door was adopted.

[0003]

However, in the door opening / closing device having the above-mentioned structure, when an opening serving as an entrance is open at the time of a power failure due to a fire or the like, the door must be manually moved in the closing direction. There was a problem to be had.

Further, when the door is closed manually, if the gear rotated by the electric motor and the chain mesh with each other, a large force is required to move the door, so that the gear meshes with the chain. An electromagnetic clutch mechanism for disengaging must be provided, which has the problem of being expensive.

In order to open and close the door lightly and to reduce the noise of the opening and closing, if the rail contact surface of the hanging vehicle provided on the door is formed of synthetic resin, the synthetic resin may be used in the event of fire or the like. However, there is a problem that the rail contact surface formed by the method may melt and the hanging wheel may come off the rail and the door may fall off.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the door is automatically closed when a fire occurs or the like, the closed state is reliably maintained, and the door moves in the closing direction. Is provided smoothly.

Further, there is provided a door opening / closing device which can open and close the door without falling off the rail even if the rail contact surface of the hanging wheel formed of a synthetic resin which comes into contact with the rail in the event of a fire is melted. Is what you do.

[0008]

According to a first aspect of the present invention, there is provided a door opening / closing device, comprising: a door; a pushed portion formed on the door; and a movable member along a moving direction of the door. At one end, a pusher that is stretched and engages with the pushed portion is provided at one end, and a weight that biases the door body in the closing direction while the pusher is engaged with the pushed portion is provided at the other end. And a wire-fixed electromagnet attached to a structure having the door body openably and closably attached to one end of the wire and adsorbing a pushing body .

Further, the door opening and closing device comprises a door and a building.
Motor for rotating a gear provided on one of
And transfer the door body to the other of the door body and the building.
Provided along the moving direction and rotated by the drive of the electric motor.
Meshing with the gear to be moved to move the door in the opening and closing direction.
Provided on one of the mating body, the door body and the building
A rotating support plate to which the motor is attached,
The holding plate is attracted against the urging force of the spring and the gear
Motor fixed to maintain the state of engagement with the meshing mechanism
And a magnet.

The pushing body is always fixed to the wire.
This wire fixed electromagnet is attracted to the constant electromagnet
Adsorber is released by the demagnetization of
Is due to the wire drawn by the weight of the weight
Engage with the pushed portion to push the door in the closing direction
Things.

This door opening / closing device is used when a fire occurs or when a power failure occurs.
When the wire fixed electromagnet is demagnetized by
The suction of the pusher at one end is released, and the wire is attached to the weight.
The pusher is engaged with the pushed part of the door.
If the door is open, push the door to the closed position,
In the closed state of the door body, the pushing body engages with the pushed portion of the door body,
The door is held in the closed position.

When the door is opened and closed, the movable support plate on which the motor is mounted is normally attracted to the motor fixed electromagnet, and the gear rotated by the motor is meshed with the meshing member. The gear meshing with the meshing body is driven to rotate, and the door body is moved in the opening direction or the closing direction.

In the event of a fire or power failure, the motor-fixed electromagnet is demagnetized, and the rotating support plate is rotated by the biasing force of the spring to disengage the gear and the meshing member.
When opening the door, manually lift the door against the weight of the weight.
The door can be pushed open and the door can be moved smoothly in the opening and closing direction.

[0014] Door opening and closing device of the invention of claim 2, wherein, in the door opening and closing apparatus according to claim 1, the wire fixing electromagnet and the electric motor fixed electromagnet are those demagnetized by fire detection signal by the fire detection means.

The wire fixed electromagnet and the motor fixed electromagnet are demagnetized by a fire detection signal from the fire detection means of the fire alarm, and the rotating support plate on which the motor is mounted is rotated by a spring to rotate the gear and the meshing member. The meshing is released, the pushing body is moved by the wire drawn by the weight, and the pushing body pushes the door body in the closing direction.

According to a third aspect of the present invention, there is provided a door opening / closing device according to the first or second aspect , wherein a rail provided on an upper portion of a to-be-opened / closed portion of a building opened and closed by the door, A plurality of suspension wheels provided on the door body and having a rail contact surface formed of synthetic resin and rolling along the rail; and a plurality of suspension wheels provided on the door body and always floating from the rail. And a spare suspension wheel having a contact surface formed of metal that comes into contact with the rail when the rail contact surface formed of the synthetic resin of the suspension wheel is melted.

In the door body, the rail contact surface formed of a synthetic resin of the suspension wheel always contacts the rail, and the spare suspension wheel having the rail contact surface formed of metal floats from the rail. The body is opened and closed lightly and with little noise.

Further, when the rail contact surface formed of synthetic resin of the hanging wheel is melted due to a fire or the like, the spare hanging wheel having the rail contact surface formed of metal is engaged with the rail, and the preliminary hanging wheel is moved from the rail. The door body can be opened and closed without being detached and falling off.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a door opening / closing device according to an embodiment of the present invention.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a fireproof sliding door that closes an openable / closable portion 3 which is an entrance / exit of a building 2 such as a constant temperature room such as a refrigerator or an airtight room such as a clean room. A plurality of, for example, two right and left suspension wheels 4, 4 each having at least two rail contact surfaces formed of a synthetic resin such as nylon are attached to the upper portion of FIG.
As shown in FIG. 7, the hanging wheels 4, 4 suspend and support the door 1, and are provided above the opened and closed portion 3 of the building 2 in the opening and closing direction of the door 1. 5 is to be rolled.

As shown in FIGS. 1, 6 and 7, a plurality of, for example, two left and right rail contact surfaces are formed on the upper part of the door 1 by a metal such as iron. The spare suspension wheels 6,6 are always lifted off the rails 5 and come into contact with the rails 5 when the rail contact surfaces formed of synthetic resin of the suspension wheels 4,4 are melted. It is supposed to.

Further, a seal member 7 is provided on the inner surface of the door body 1 so as to abut on the peripheral edge of the opened / closed portion 3 to close when closed.

Next, in FIG. 1, FIG. 2 and FIG.
Is a motor that can be driven forward and reverse, such as a geared motor. This motor 10 is mounted on a rotation support plate 11 that is mounted on the upper surface of the door body 1 so as to be rotatable vertically. The other end is urged by a spring 12 mounted on an appropriate portion such as one end of the plate 11 or the other end so that the other end is flipped upward and turned. An adsorption piece formed of an iron plate at the other end of the rotation support plate 11
13 is installed.

Further, on the upper surface of the door 1, a motor fixed electromagnet 15 for attracting the attracting piece 13 of the rotation support plate 11 is attached. The motor fixed electromagnet 15 attaches the suction piece 13 of the rotation support plate 11. The spring 12 is attracted against the spring 12.

The drive shaft 18 of the electric motor 10 is
The drive shaft 18 is mounted so as to protrude to the side. Further, a chain 20 as a meshing body meshing with the gear 19 is stretched and fixed in parallel with the rail 5.

The gear 19 meshes with the chain 20 while the attraction piece 13 of the rotation support plate 11 is attracted to the electric motor fixed electromagnet 15 against the spring 12, and the rotation of the gear 19 causes the door body to rotate. 1 is designed to be opened and closed.

As shown in FIG. 1 and FIG. 2, a pushed portion 21 is formed to protrude upward from an end of the upper surface of the door 1 on the opening movement direction side. A pushing body 22 that engages with the pushed portion 21 is provided at one end of a wire 23 that is stretched so as to be horizontally movable along the moving direction of the door 1.

The wire 23 is inserted into an insertion hole 24 formed in the pushed portion 21, and the wire 23 rotates above a guide column 25 provided at the closed end of the opened / closed portion 3 of the building 2. The wire 23 is suspended and guided by a guide roller 26 which is pivotally supported, and is suspended downward by a weight 27 provided at the other end of the wire 23. The weight 27 is raised and lowered along the guide column 25. It has become.

The pushing body 22 pushes the door 1 in the closing direction by the wire 23 being pulled by the load of the weight 27 in a state of being engaged with the pushed part 21. I have.

A wire fixing electromagnet 28 for attracting the pusher 22 provided at one end of the wire 23 is attached to an upper portion of the open end of the opened / closed portion 3 of the building 2.

Opening / closing handles 30, 31 are provided on the front and inner surfaces of the door 1, respectively.

Further, as shown in FIG. 1, a connector 33 for connecting a wire 32 for supplying DC power to the motor 10 and the motor fixed electromagnet 15 provided on the door body 1 is attached. Electromagnet 28
Is connected to a control device 34, which is connected to fire detection means 35 of a fire alarm.

Next, the operation of this embodiment will be described.

Usually, a rotation support plate to which the motor 10 is attached
11 attracting pieces 13 are attracted to the motor fixed electromagnet 15,
The gear 19 rotated by 10 meshes with the chain 20 of the meshing body. The gear 19 meshing with the chain 20 is driven to rotate by the forward / reverse switching drive of the electric motor 10, and the door 1 is opened or closed or closed. Be moved.

When the door 1 is closed, the electric motor 10 is driven in the forward direction so that the drive shaft of the electric motor 10 is driven.
A gear 19 pivotally supported by 18 meshes with the chain 20 and rotates, and the door 1 is suspended along rails 5 and 5 provided above the opened and closed portion 3 of the building 2 toward the closing direction. The wheels 4, 4 are rolled and moved to close the opened / closed portion 3.

At this time, the insertion hole 24 of the pushed portion 21 of the door 1
The pusher 22 attached to one end of the wire 23 inserted into the wire is attracted to the wire fixed electromagnet 28 so that the weight of the weight 27 is not applied to the door 1 when the door 1 moves.

When the door 1 is opened, the hanging wheels 4,
When the motor 4 is driven in the reverse direction, the gear 19 meshes with the chain 20 and rotates, so that the door 1 moves in the closing direction to open the opened / closed portion 3.

The controller 34 cuts off the supply of DC power to the wire fixed electromagnet 28 and the motor fixed electromagnet 15 in response to a fire detection signal from the fire detection means 35 of the fire alarm and in the event of a power failure, so that the wire fixed electromagnet 28 And the motor fixed electromagnet 15 are demagnetized.

When the wire fixed electromagnet 28 is demagnetized, the attracted portion 21 provided at one end of the wire 23 is released, the wire 23 is pulled by the weight 27, and the pushed body 22 is covered by the door 1. When the door 1 is in the open state, the door 1 is pushed to the closed position, and the doors 1 are rotated by the hanging wheels 4, 4 along the rails 5, 5. The door 1 is closed.

When the door 1 is closed, the pusher 22 engages with the pushed portion 21 of the door 1 to hold the door 1 in the closed position.

When the motor-fixed electromagnet 15 is demagnetized, the rotation support plate 11 is rotated by the urging force of the spring 12, the mesh between the gear 19 and the chain 20 is released, and the door 1 is opened and closed. Can be smoothly moved in the closing direction.

Further, in this state, when the door 1 is opened, if the door 1 is moved in a direction to open the opened / closed part 3 by manual operation of the handles 30 and 31, the pushed part of the door 1 is moved. twenty one
Can be pushed open against the weight of the weight 27 hanging on the pusher 22 engaged with the pusher 22. At this time, since the rotation support plate 11 to which the electric motor 10 is attached is rotated by the spring 12 to disengage the gear 19 and the chain 20, the door 1 is moved lightly.

In the door body 1, the rail contact surfaces formed of synthetic resin of the suspension wheels 4 and 4 are always in contact with the rails 5 and 5, and the auxiliary suspension wheel 6 and the rail contact surface formed of metal. 6
Are raised from the rails 5 and 5, the door 1 is opened and closed lightly and with little noise.

When the rail contact surfaces formed of the synthetic resin of the suspension wheels 4 and 4 are melted due to a fire or the like, the spare suspension wheel whose rail contact surfaces are formed of metal engages the rails 5 and 5, Lifting wheels 4, 4 are disengaged from rails 5, 5 and door 1
The door 1 can be opened and closed without falling off.

According to the above embodiment, the meshing member meshing with the gear 19 rotated by the electric motor 10 is formed by the chain 20. However, the meshing member meshing with the gear 19 can be formed by rack teeth.

Further, in the above-described embodiment, the chain 20 of the meshing member is provided on the side of the structure 2 and the rotation support plate 11 to which the electric motor 10 for rotating the gear 19 is mounted is provided on the door 1. Can be attached to the door 1 and the electric motor 10 can be attached to the building 2 side.

In the above-described embodiment, the door opening / closing device operated by the electric motor 10 has been described. However, the door opening / closing device is not limited to the electric door opening / closing device. In such a case, the pusher 22 normally attracted to the wire-fixed electromagnet 28 is released by the demagnetization of the wire-fixed electromagnet 22, and the released pusher 22 is attracted by the weight of the weight 27. Wire
The door 23 can be engaged with the pushed portion 21 to push the door 1 in the closing direction.

[0048]

According to the first aspect of the present invention, the wire fixed electromagnet is demagnetized in the event of a fire or a power failure, so that the door is open when the weight of the weight applied to the wire is open. When the door is closed, the pushed body is engaged with the pushed portion of the door in the closed state of the door, the door can be held in the closed position, and when the door is opened. The door can be manually pushed open against the weight of the weight.

Further, when the door is opened and closed, the motor is normally meshed with the meshing body, and the door is moved in the opening direction or the closing direction by meshing the gear rotated by driving the motor and the meshing body. it can.

In the event of a fire or power failure, the motor-fixed electromagnet is demagnetized, and the rotating support plate is rotated by the urging force of the spring to disengage the gear and the meshing member.
The door body can move smoothly in the opening and closing directions.

According to the second aspect of the present invention, the door is automatically closed by demagnetizing the wire-fixed electromagnet and the motor-fixed electromagnet according to a fire detection signal from the fire detection means of the fire alarm. Can be.

According to the third aspect of the present invention, the door body is always in contact with the rail contact surface made of synthetic resin of the suspension wheel, and can be opened and closed lightly and with little noise, and can be suspended by fire or the like. When the rail contact surface formed of the synthetic resin of the car melts, the spare suspension wheel that forms the rail contact surface with metal is engaged with the rail, the suspension car comes off the rail, and the door body does not fall off, The door can be opened and closed.

[Brief description of the drawings]

FIG. 1 is a front view of a door opening and closing device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a part of the door opening and closing device.

FIG. 3 is a plan view of the door opening and closing device.

FIG. 4 is a side view of the door opening and closing device.

FIG. 5 is an enlarged plan view of a part of the door opening and closing device.

FIG. 6 is an enlarged front view of a part of the door opening and closing device.

FIG. 7 is an enlarged side view of a part of the door opening and closing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door body 2 Structure 3 Opening / closing part 4 Hanging wheel 5 Rail 6 Preliminary hanging wheel 10 Electric motor 11 Rotation support plate 12 Spring 15 Electric motor fixed electromagnet 19 Gear 20 Meshed chain 21 Pushed part 22 Pushing body 23 Wire 27 Weight 28 Wire fixed electromagnet 35 Fire detection means

Claims (3)

(57) [Claims] 1. A door, a pushed portion formed on the door, and a pushing body which is movably stretched along a moving direction of the door and is engaged with the pushed portion. And a wire provided at the other end with a weight that urges the door in the closing direction in a state in which the pushing body is engaged with the pushed portion, and a building provided with the door so that it can be opened and closed. A wire-fixed electromagnet attached to one end of the wire and attached to a pushing body, and a gear provided on one of the door and the building is turned.
The motor to be rotated, and the other of the door and the building
Provided along the direction and rotated by the drive of the electric motor
Meshing with the gear to move the door in the opening and closing direction
And had body, the electric provided on one of said door body and erecting thereof
Rotating support plate with machine installed, and attracts this rotating support plate against the urging force of the spring
An electric power for maintaining the state in which the gear is engaged with the meshing mechanism.
The pusher is always attracted to the wire-fixed electromagnet, and is released by the demagnetization of the wire-fixed electromagnet, and the pusher released from the attraction is attracted by the weight of the weight. A door opening / closing device, wherein the door body is pushed by the wire to be engaged with the pushed portion in the closing direction. 2. A door closing device according to claim 1, wherein the wire fixing electromagnet and the electric motor fixed electromagnet, characterized in that it is demagnetized by fire detection signal by the fire detection means. 3. A rail provided on an upper part of a to-be-opened / closed part of a structure opened and closed by a door body, and a rail contact surface provided on an upper part of the door body and formed of a synthetic resin. And a plurality of hanging wheels that roll over, and a metal that is provided at the upper part of the door body and normally floats from the rail and that comes into contact with the rail when a rail contact surface formed of synthetic resin of the hanging wheel is melted. The door opening / closing device according to claim 1 or 2 , further comprising a spare hanging wheel having a contact surface formed by molding.