JPH0611354Y2 - Automatic closing device for sliding doors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an automatic closing device for a sliding door.

[Conventional technology]

Conventionally, in automatic closing devices for sliding doors, for example
As disclosed in Japanese Patent Publication No. 7-39495, there is known an automatic closing device in which a sliding door can be freely opened and closed in normal times and automatically closed when an abnormality such as gas or smoke is detected.

[Problems to be solved by the device]

According to the above-mentioned conventional technique, the sliding door can be freely opened and closed without interfering with the rope and the weight body by fixing the front end of the rope having the weight body at the rear end to the locking device and fixing it in normal times. When abnormalities such as gas and smoke are detected by the abnormalities detector, the locking by the locking device is released to make the rope movable, so that the weight of the weight body pulls the rope, An automatic closing member provided near the tip of the sliding door is brought into contact with a passive member connected to the sliding door so that the sliding door is automatically closed by the weight of the weight.

However, according to this conventional technique, since the passive member on the sliding door side, the automatic closing member and the rope are completely separated in the normal state, the sliding door can be freely opened and closed, while the automatic closing mechanism does not work. Since there is no such thing, once you open the sliding door and release it, the sliding door remains in the open position,
It is necessary to close the sliding door each time.

By the way, in a sliding door, when the sliding door is normally opened, it is desirable to automatically close the sliding door without releasing the operation.

However, for example, when several people pass through the doorway almost continuously, if the automatic closing mechanism is always working, the sliding door will automatically close every time one person passes, so that the succeeding person opens the sliding door again or The operation to hold the open state is necessary, and the operation becomes troublesome. Further, if the operation is neglected, there is a risk of colliding with a sliding door which is going to be closed.
Therefore, it is desirable that the sliding door can be held in an open state as needed.

However, if the above-mentioned open state is maintained even after the last person passes, it makes no sense to provide an automatic closing device, so the last person, etc. artificially sets the above-mentioned open state as necessary. It is desirable to be able to easily release and the sliding door to be closed automatically.

In addition, if an abnormality detector for gas, smoke, etc. is activated in the event of a fire, if the sliding door remains open, there is a danger of fire spread, which is dangerous. It is desirable to prevent the retention mechanism from working and to ensure that the sliding door is automatically closed regardless of its position.

An object of the present invention is to provide a device that can meet the above-mentioned requirements (1) to (3).

[Means for Solving the Problems]

To achieve the above object, the present invention is configured as follows.

(1) In an automatic closing device for a sliding door, in which a sliding door that is openably and closably provided at an entrance / exit is biased in a closing direction by an automatic closing means, a locked tool is attached to the sliding door, and the sliding door is engaged in an open state. The fixed frame is provided with a latch for an open state provisional fixing that engages with the stopper in a detachable manner and releases the engagement with the door opening force that overcomes the locking force due to the engagement, and the latch is provided with the automatic closing means. A backup means is provided so that the position can be freely changed between a temporary fixing action position that urges the latch to the temporary fixing position with a force slightly larger than the urging force in the sliding door closing direction and a temporary fixing release position that supports the latch so that it can move freely. An automatic closing device for a sliding door provided with a switching means for retracting the backup means to a temporary fixing release position when an abnormality is detected by the abnormality detector and holding the backup means in the temporary fixing operating position at other times.

(2) In the device of (1) above, the latch is provided with a spring for urging the latch to a temporarily fixed position, a spring receiver for supporting the spring, and a backup lever that is detachable from the spring receiver. , Input the abnormality detection signal from the abnormality detector to disengage the backup lever from the spring bearing and retract it to a position where the spring bearing can freely move, and otherwise engage the backup lever with the spring bearing. An automatic closing device that is equipped with a solenoid mechanism that holds the spring bearing in the temporarily fixed position.

(3) In the device of (2) above, the case is equipped with a latch, a spring, a spring receiver, a backup lever, and a solenoid mechanism, and a reset lever for returning the backup lever from the temporarily released position to the temporarily operated position is provided in the case. When the sliding door is opened at the sliding door closing side end of the internal space of the rammer, the case is housed in the internal space of the rammer provided at the upper part of the sliding door, and one end of the reset rope is connected to the reset lever. An automatic closing device in which the other end of the reset rope is arranged in the opening of the opening.

(4) In the device of (2) or (3) above, an automatic closing device comprising a temporary lock release confirmation switch that is activated when the backup lever is in the temporary lock release position.

[Action]

With the configuration of (1) or (2) above, the sliding door is always biased in the closing direction by the automatic closing means, so in normal times, within a range until the locked tool engages with the latch,
Even if you open the sliding door, if you release your hand, the sliding door will be closed automatically.
Also, in normal times, if the locked tool is released to the position where it engages with the latch, the locked tool engages with the latch and the engagement state is held by the backup means, that is, the backup lever, and the sliding door is in the open state. Is held (temporarily fixed).

After that, if the sliding door is operated in the closing direction with a force slightly stronger than the holding force by the latch via the backup means, the locked tool is disengaged from the latch, and the above automatic closing function is exerted. Further, when an abnormal condition is detected by the abnormal detector for gas, smoke, etc., the backup means is displaced to the temporary release position, and at this time, the sliding door is opened and the latched tool is engaged. However, the temporary fixing function by the latch is not exerted, and the sliding door is automatically closed by the urging force of the automatic closing means in the closing direction. This makes it possible to satisfy all the above-mentioned requirements (1) to (3).

With the configuration of (3) above, each member of the temporary fastening mechanism is housed in a case to be compact, easy to assemble to a sliding door, etc. It can be easily returned to the stoppable state.

With the configuration of (4) above, after detecting an abnormal situation, you can easily confirm that the backup lever is in the temporary tack release state via the temporary tack release confirmation switch, and based on this, return to the original temporary tack enable state. Can be performed more easily.

〔Example〕

First, the outline of the supporting structure of the sliding door will be described with reference to FIGS. 1 and 2. In the figure, 1 is a doorway, 2 is a sliding door provided at the doorway so as to be freely openable and closable, 11 is a column that stands upright and left at a predetermined interval,
12 is a door pocket provided on one side of the doorway 1 and 13 is a doorway 1
Rammer provided over the upper part of the door and the upper part of the door pocket 12, 14
Indicates a ceiling rail, and 15 indicates a floor rail.

The door pocket 12 has a pair of door pocket panels 121 on one side of the doorway 1.
Are arranged at predetermined intervals in the front and rear, and a sliding door storage space 122 is formed inside thereof, that is, between both panels 121, which is open to the entrance 1 side and the rammer 13 side. The double door bag panel 121 is detachably attached to the column 11 or the like. In addition,
Only one panel may be detachable.

The rammer 13 is formed by arranging a pair of rammer panels 131 at a predetermined interval in the front and rear direction over the upper part of the doorway 1 and the upper part of the door pocket 12, and inside thereof, that is, between the two panel 131, on the doorway 1 side and the door pocket 12 side. A space 132 that opens is formed. Both rammer panels 131 are detachably attached to the column 11 or the fixed frame 16 inside. Note that only one panel may be detachable.

In the internal space 132 of the rammer 13, as shown in FIG. 3 to FIG. 5, mounting seats 111 are provided on the inner surfaces of both columns 11, and both ends of a horizontally long fixed frame (fixed frame) 16 are attached to both mounting seats 111. It is mounted via a vertical adjustment bolt 161 and a front-rear fixing bolt 162 so that the horizontal level can be adjusted. And this fixed frame 16
The sliding door 2 is supported by the support device 22 so as to be openable and closable in the left-right direction.

As shown in FIG. 4, the sliding door supporting device 22 generally has a long outer fixed rail 221 formed in a substantially U-shaped cross section, and a relatively short inner movable rail 22 formed in a substantially U-shaped cross section.
2 and are provided. A slide bearing including a plurality of balls 223 rotatably provided via a retainer (not shown) is interposed between the outer fixed rail 221 and the inner movable rail 222. Then, the outer fixed rail 221 is fixed to the fixed frame 16, and the inner movable rail 2
By connecting the sliding door 2 to 22 via the hanging metal fitting 23, the sliding door 2 can be opened and closed in the left-right direction between the columns 11 in a hanging door type. In addition, near the door pocket 12 on the floor corresponding to the movement path of the sliding door 2, a swing roller 17 is provided via a vertical axis.
(See FIG. 1) is rotatably mounted, and the guide groove 24 provided in the left and right direction on the lower end surface of the sliding door 2 is engaged with the roller 17 to prevent the lower end portion of the sliding door 2 from swinging in the front-rear direction. is doing. The structure of the sliding door supporting device 22 is not particularly limited, and a door type hanging door using an upper rail, a door type sliding door using a lower rail, or any other type may be used.

As a means for automatically closing the sliding door 2, a pair of pulleys 32 are provided near the left and right ends of the fixed frame 16 via brackets 31, respectively.
Is rotatably supported, and an automatic closing rope 3 is movably provided between the pulleys 32 so as to be movable in the opening / closing direction of the sliding door 2.
A separation preventing piece 311 is continuously provided on each placket 31 so that the rope 3 does not come off from the bracket 31 due to vibration or the like. The front end of the rope 3 is connected to the sliding door 2 via a fastener 33, and the rear end of the rope 3 is hung in the door pocket 12 and a weight 34 is attached to the tip thereof, so that the sliding door 2 always has the weight of the weight 34. Is biased in the closing direction. The weight body 34 is housed in the door pocket 12 in a tubular reinforcement and guide portion 35 formed on the inner surface of the door pocket panel 121 so as to be vertically movable. The automatic closing means is not limited to the structure using the weight body 34 and the rope 3, and any device such as a cord reel type having an automatic winding mechanism or a damper mechanism can be used.

A temporary fixing roller (locked tool) 4 is rotatably attached via a bracket 41 near the upper end of the sliding door 2 on the side opposite to the doorway 1. On the other hand, when the sliding door 2 is opened (for example, fully opened), the temporary fixing latch 5 that engages with the roller 4 is rotatable in the up-down direction on the case 51 via the pivot shaft 52 as shown in FIGS. 6 and 7. The case 51 is supported and is attached to the inner surface of the fixed frame, that is, the column 11 (3rd
See figure). Reference numeral 53 indicates a stopper of the latch 5.

A latch retainer 61, a spring 62, a guide shaft 63, a spring receiver 64, and a backup lever 6 are provided in the case 51 as backup means for the latch 5. The latch presser 61 is movably supported in the case 51 so as to move up and down as the latch 5 rotates around the pivot shaft 52 in a state of being mounted on the back surface, that is, the upper surface of the latch 5, and the latch presser 61 has a guide shaft 63. The lower end of the guide shaft 63 is fixed, the spring 62 is fitted into the guide shaft 63 between the latch retainer 61 and the spring receiver 64, the spring receiver 64 is fitted to the upper end portion of the guide shaft 63 so as to be vertically movable, and It is supported so that it can be raised and lowered. Reference numeral 54 denotes a guide hole of the spring receiver 64.

The backup lever 6 is rotatably supported on the case 51 via a pivot 66, and the locking claw 6 attached to the lever 6 is attached.
The position 5 can be freely changed between a temporary fastening action position where the spring bearing 64 is engaged (see FIG. 6) and a temporary fastening release position where the spring bearing 64 is disengaged (see FIGS. 8 and 9).

The solenoid 7 includes an electromagnetic coil and a movable shaft 71,
The movable shaft 71 is formed of a permanent magnet, or a permanent magnet is attached to the lower end of the movable shaft 71. The movable shaft 71 is attached to a predetermined position in the case 51 via a holding frame 70, and a pin is attached to the tip of the movable shaft 71. The plunger 73 is connected via 72, and the backup lever 6 is connected to the tip of the plunger 73 via a pin 74. Then, in a normal state, the electromagnetic coil is OFF, the movable shaft 71 and the plunger 73 are pushed downward against the spring 75, and the movable shaft 71 and the like are attracted and held in the lowered position by the magnetic force of the permanent magnet. , The backup lever 6 is held in the temporary fixing action position via the plunger 73, and when an abnormality detection signal from an abnormality detector (not shown) such as gas or smoke is input, the electromagnetic coil is turned on to reverse the magnetic field of the permanent magnet. After the movable shaft 71 is repulsed upward by generating the magnetic field of, the movable shaft 71 and the plunger 73 are further raised by the spring 75, and the backup lever 6 is moved to the temporary release position (see FIGS. 8 and 9). It is configured to be evacuated. Reference numeral 67 denotes a switch for confirming the temporary fixing release position of the backup lever 6.

The reset lever 8 is for returning the backup lever 6 retracted to the temporary tacking release position to the original temporary tacking operation position, and is pivotally supported by the case 51 via a pivot shaft 81 and is not acted by a spring 82. Retracted to the position. 55
Indicates a stopper for the reset lever. Reset rope 8
A rear end of the sliding door 3 is connected to the reset lever 8, and an intermediate portion is stretched over the fixed frame 16 so as not to interfere with the opening and closing of the sliding door 2 in the inner space 132 of the rammer, and the leading end of the sliding door closing side of the space 132. When the sliding door 2 is opened at the end, the sliding door 2 is arranged in the mounting seat 111 on the side of the pillar 11 on the closing side of the sliding door, which is visible from below.
The operation knob 84 is connected to the end of the operation.

Next, the operation of the above device will be described.

First, in normal times, the abnormality detector detects a normal state, the solenoid 7 is turned off accordingly, the backup lever 6 is pulled down, and the locking claw 65 of the lever 6 engages with the spring receiver 64. However, the spring receiver 64 is held at the lower limit position, that is, the temporary fixing action position. On the other hand, the sliding door 2 has a weight 34.
Is urged in the closing direction by the weight of the rope 3 and is held in the closed state.

Here, when the sliding door 2 is opened, the rope 3 is pulled and the weight 3
4 is raised. At this time, the weight 34 is under its own weight and is in the door pocket 12.
Since it only hangs inside, the sliding door 2 is opened smoothly by opening it with a force larger than the urging force in the closing direction due to the weight of the weight body 34. When the sliding door 2 is opened and the hand is released, the weight body 34 descends by its own weight, the rope 3 is pulled, and the sliding door 2 is automatically closed by the pulling force. Further, after closing, the sliding door 2 is held in a closed state by the urging force of the weight body 34. In this way, the sliding door 2 can be freely opened and closed in normal times, and there is no possibility that the sliding door 2 will be left open, and the sliding door 2 can be reliably held in the closed state.

On the other hand, when the sliding door 2 is fully opened during normal operation, as shown in FIG.
As shown in FIG. 6, the roller 4 connected to the sliding door 2 is engaged with the temporary fixing latch 5. At this time, since the spring receiver 64 is held in the temporary fixing position by the backup lever 6, the latch 5 is biased downward by the spring 62, and therefore the roller 4 pushes up the latch 5 against the spring 62. On the other hand, under the latch 5, the latch 5 returns to its original position by the force of the spring 62 after the passage, and engages with the roller 4. If the hand is released from the sliding door 2 after the engagement, the biasing force of the weight body 34 in the closing direction acts on the sliding door 2, but the latch 5 when the spring receiver 64 is fixed to the temporary fixing action position. Since the spring constant and the like are set so that the engaging force of the spring 62 on the roller 4 is larger than the urging force in the closing direction by the weight body 34, there is no fear that the roller 4 will be disengaged from the latch 5. The engaged state of is surely maintained. With this, when the sliding door 2 is fully opened, the fully opened state of the sliding door 2 can be automatically and reliably maintained by the engagement of the latch 5 and the roller 4, and the hand is blocked when a large object is held. This is very convenient when passing through the entrance / exit 1 in a state, and when several people pass through the entrance / exit 1 almost continuously.

After that, when the sliding door 2 is desired to be closed, the sliding door 2 is operated in the closing direction with a force slightly larger than the engaging force between the latch 5 and the roller 4 by the spring 62, and the roller 4 resists the latch 5 against the spring 62. While pushing it up, it disengages from the latch 5,
The above engagement is released, and the fully open holding of the sliding door 2, that is, the temporary fixing is released. In this case, a large force may be applied only at the moment when the roller 4 is disengaged from the latch 5. After that, the above-mentioned automatic closing function is exerted, and when the hand is released from the sliding door 2, the weight 3
The sliding door 2 is automatically closed by the force of 4.

Next, when an abnormality such as a fire occurs and the abnormality detector operates, the solenoid 7 is excited by the signal from the detector, and the movable shaft (made of a permanent magnet or with a permanent magnet) 71
Is repulsed and pushed up. The amount of pushing up of the movable shaft 71 at this time is small, and thereafter, it is pushed up largely by being assisted by the spring 75 (see FIG. 8). Then, the plunger 73 is raised by the rise of the movable shaft 71, the backup lever 6 is rotated in the clockwise direction, the locking claw 65 is disengaged from the spring bearing 64, and the spring bearing 64 becomes freely movable, so that the spring 62 force is latch 5
Will not work.

Therefore, after that, fully open the sliding door 2 for evacuation,
Even when the roller 4 reaches the engagement position of the latch 5, the latch presser 61, the spring 62, the shaft 63, and the spring receiver 64 are integrally raised by the rotation of the latch 5, and then they are simply lowered by their own weight. The latch 5 only engages with the roller 4 by its own weight, and the temporary fixing action is not exerted. For this reason,
When the sliding door 21 is released, the sliding door 2 is immediately and automatically closed by the urging force of the weight body 34 in the closing direction.

Further, when the sliding door 2 is fully opened and the roller 4 is engaged with the latch 5 to hold (temporarily fix) the sliding door 2, if the above-mentioned abnormality occurs, the backup lever 6 is operated by the same action as described above. The spring receiver 64 is displaced to the temporary release position, and the spring receiver 64 is allowed to freely move, the fully open holding of the sliding door 2 is released, and the sliding door 2 is immediately and automatically closed by the closing force of the weight body 34.

This allows the sliding door 2 to be freely opened and closed in the event of a fire, etc., the temporary locking function in the fully open state can be released, and the automatic closing function can automatically close the sliding door 2 so that the sliding door 2 can be left open. It is safe because it can prevent the spread of fire and so on.

When the backup lever 6 is displaced to the temporary release position in the abnormal state, the lever 6 turns on the switch 67. Therefore, this switch 6
By providing an indicator lamp or the like connected to 7 on the surface of the rammer 13 or on the centralized control room, it is possible to easily confirm the above-mentioned temporary release state from the outside or from a remote position.

After the abnormal situation is released, the solenoid 7 is demagnetized, the sliding door 2 is slightly opened, and the reset rope 83 hanging in the rammer 13 is pulled above the doorway 1, so that the reset lever 8 moves to the first position. As shown by the chain double-dashed line in FIG. 8, the backup lever 6 is rotated counterclockwise by this lever 8 to return to the temporary fixing action position, and the locking claw 65 is attached to the spring receiver 64. It is engaged and is returned to the normal state shown in FIG. At this time, the plunger 73 and the movable shaft 71 of the solenoid 7 are interlocked with the rotation of the backup lever 6 and are pushed down against the spring 75, and then are held in the lowered position, that is, the temporary fixing position by the magnetic force of the permanent magnet. . This allows repeated use.

Note that the reset rope 83 is not necessarily the rammer 113.
It is not necessary to stop the inside of the rammer, and it may be projected from the lower end of the rammer.

[Effect of device]

INDUSTRIAL APPLICABILITY As described above, the present invention allows the sliding door to be freely opened and closed, and in normal times, it can be automatically closed by releasing the hand without opening and closing the sliding door. If it is released to the fully open position, the sliding door can be securely held or temporarily fixed at the predetermined open position by the engagement of the temporary latch and the locked tool such as the roller, for example, when several people pass almost continuously. It is possible to pass through the doorway at will without the need to open or maintain the open state one by one when the hand is blocked. In addition, since the fully opened state is temporarily fixed, the opened (fully opened) holding state can be easily and artificially released by strongly pulling the sliding door, and the sliding door can be automatically closed. Further, in the event of an abnormality such as a fire, the function of holding the open door of the sliding door can be automatically canceled and the sliding door can be closed immediately. Also, even if the evacuee opens the sliding door in the event of an abnormality, and even if the sliding door is normally opened to the position where this open state is maintained, the backup means once the temporary fixing function is released will not be reset. Even if the evacuees do not work and evacuees pass through the sliding doors and evacuate, the sliding doors are automatically closed by the function of the automatic closing means, and it is possible to effectively prevent fire spread and evacuation. It is also convenient in terms of securing an evacuation passage for people.

[Brief description of drawings]

FIG. 1 is a conceptual view of the overall structure showing an embodiment of the present invention with the front side panel of the rammer and door pocket removed, FIG. 2 is its external front view, and FIG. 3 is III-III of FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. 4, FIG. 5 is a sectional view taken along line VV of FIG. 3, FIG. 6 is a longitudinal sectional view of the latch mechanism portion, and FIG. 6 is a sectional view taken along the line VII-VII, and FIGS. 8 and 9 are views corresponding to FIG. 6 showing the temporary fastening released state. 1 ... Doorway, 2 ... Sliding door, 3 ... Rope for automatic closing,
4 ... Temporary fixing roller (locked tool), 5 ... Temporary fixing latch, 6 ... Backup lever, 7 ... Solenoid,
8 ... Reset lever, 11 ... Support (fixed frame), 16 ... Fixed frame (fixed frame), 34 ... Weight, 51 ... Case, 61 ... Latch retainer, 62 ... Spring, 63 ... Guide shaft, 64 ... Spring receiver, 65 ... Locking claw, 67 ... Temporary fastening release confirmation switch, 83 ... Reset rope.

Claims (4)

[Scope of utility model registration request] 1. An automatic closing device for a sliding door, wherein a sliding door openably and closably provided at an entrance / exit is biased in a closing direction by an automatic closing means, and a locked tool is attached to the sliding door to open the sliding door. The fixed frame is provided with a latch for open state that temporarily engages with the locked tool and releases the engagement with the door opening force that overcomes the locking force due to the above-mentioned engagement, and the latch is automatically closed. The backup means that can change the position between the temporary locking action position that biases the latch to the temporary locking position with a force slightly greater than the biasing force in the sliding door closing direction by the means and the temporary locking release position that supports the latch so that it can move freely. A switching means is provided for retracting the backup means to the temporary fixing release position when the abnormality is detected by the abnormality detector, and for holding the backup means in the temporary fixing operating position at other times. Automatic closure device of the door. 2. The latch is provided with a spring for urging the latch to a temporarily fixed position, a spring receiver for supporting this spring, and a backup lever which can be engaged with and disengaged from the spring receiver. By inputting an abnormality detection signal, the backup lever is disengaged from the spring bearing and retracted to a position where the spring bearing is free to move, and at other times, the backup lever is engaged with the spring bearing to temporarily fix the spring bearing. The automatic closing device for a sliding door according to claim 1, further comprising a solenoid mechanism for holding the position. 3. A latch lever, a spring, a spring receiver, a backup lever, and a solenoid mechanism are mounted on a case, and a reset lever for returning the backup lever from a temporarily released position to a temporarily operated position is provided on the case. The case is stored in the inner space of the rammer provided at the upper part, one end of the reset rope is connected to the reset lever, and the opening that opens when the sliding door is opened at the sliding door closing side end of the inner space of the rammer. The automatic closing device for a sliding door according to claim 2, wherein the other end of the reset rope is arranged. 4. The automatic closing device for a sliding door according to claim 2, further comprising a temporary lock release confirmation switch that is activated when the backup lever is in the temporary lock release position.