JPH08151877A - Structure for preventing malfunction in electric switchgear for construction - Google Patents

Abstract

(57) [Abstract] [Purpose] When two electric switchgear are installed so that the other electric switchgear can be opened and closed only when one electric switchgear is closed, Be sure to prevent the malfunction of opening both electric switchgear within the contact recovery range. An opening / closing control circuit of each of the electric shutter devices 2 and 3 is interlock-connected by first and second interlock circuits X and Y, and the first interlock circuit is connected to a lower limit of the second electric shutter device 3. Limit switch LSD
Structure for outputting an openable signal to the first AND circuit 14 only when the second electric shutter device 3 is ON and the open signal is not input to the second electric shutter device 3. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erroneous operation preventive structure for an electric opening / closing device for construction such as electric shutters, electric seat shutters, electric hangar doors, etc. which are installed at entrances and exits of buildings such as factories and warehouses.

[0002]

2. Description of the Related Art Today, in order to improve the performance of shutting off the air conditioned in the room from the outside air, a waiting room for waiting a passerby is provided at the entrance and exit of the room, and the room of the waiting room is provided. Install electric shutters, electric seat shutters, electric hangar doors, and other electrically-operated building opening and closing devices at the inside entrance and outside entrance, respectively, and
For example, when a passerby enters the room from the outdoors, the electric switchgear on the outdoor side opens and closes with the indoor electric switchgear closed, so that the passer first enters the spare room, and then
There is an outdoor electric switchgear that allows a passerby to enter a room by opening and closing the indoor electric switchgear in a closed state.

In the case where the electric switchgear of the double internal / external type is installed in this way, the desired breaking performance cannot be achieved if the electric switchgear of the internal / external dual stations are opened at the same time. Unless one of the inside and outside is in the fully closed state, it is necessary to set the other so as not to open. Therefore, conventionally, when one of the full-close limit switches is in the detection state, the other full-close limit switches are connected to each other in an interlocking relationship so that the opening operation of the other electric shutter is allowed. .

In this case, however, when the electric switchgear is opened from the fully closed state, there is inevitably a time loss until the fully closed limit switch returns from the fully closed detection state to the non-fully closed state. For this reason, when a passerby tries to enter and exit from the inside and outside of the room at the same time, both the inside and outside of the electric switchgear are opened during the above-mentioned time loss, and the limit switches for full closing close the contacts. By switching to the non-fully opened state by the operation, the interlock circuits of the two electric switchgears are mutually opened and stopped together. Then, when both the limit switches for full closing are switched to the non-full open state in this way, both electric shutters are locked and cannot be opened. To release this, either one of them must be released. There is a problem that a troublesome and complicated work of turning off the power source of the electric switchgear to disguise the fully closed limit switch to a fully closed detection state and thereby opening and closing the other electric switchgear is required.

[0005]

SUMMARY OF THE INVENTION The present invention was devised with the object of providing an erroneous operation preventive structure in an electric switchgear for a building which can eliminate these drawbacks in view of the above circumstances. At this time, an electric opening / closing device is provided at each of the indoor side entrance and the outdoor side entrance of the standby room provided at the indoor / outdoor entrance, and each of the electric opening / closing devices is provided with an opening / closing control unit for controlling opening / closing. When controlling the opening operation of the other electric switchgear when one of the electric switchgear is in the non-fully closed state, each opening / closing control unit controls the opening / closing control section of the corresponding electric switchgear from the limit switch for full closing. An openable signal output means for outputting an openable signal to the other open / close control unit under the condition that a fully closed detection signal is input and an open signal of the electric switchgear is not input,
An opening / closing permitting means for bringing the electric switchgear into the opening permitting state when an opening enabling signal is input from the counterpart side opening / closing control unit is provided.

According to the present invention, both the inside and outside electric switchgears are prevented from being simultaneously opened within the range of contact recovery of the limit switches for full closing.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a standby chamber which follows the wind-preventing chamber and is designed to enter through the standby chamber 1 when entering the wind-preventing chamber from the outside. First and second shutter devices 2 and 3 that operate at high speed are provided at the openings of the avoidance room side entrance and the outdoor side entrance, respectively. First, second shutter curtain 4,
5 is guided to open and close by forward and reverse driving of the respective opening and closing switches 6 and 7. In this case, these first and second shutter curtains 4 and 5 are in a state in which one shutter curtain is closed. The interlock wiring is arranged so that the other shutter curtain is opened only when the time is set, and these configurations are the same as the conventional ones. still,
Reference numeral 8 is a shutter case in which the shutter curtains 4 and 5 are wound and housed, and 9 is a guide rail for guiding opening and closing of the shutter curtains 4 and 5.

The switches 6 and 7 are connected to and controlled by the first and second switching control circuits. These switching control circuits are connected to the first and second switching control circuits. Therefore, the first opening / closing control circuit will be described. In the first opening / closing control circuit, opening, closing, and stopping operation switches PBU, PBD, PBS, upper and lower limit switches LSU, LSD, ascending / descending deceleration position detection switches 10 and 11, obstacle detection switch SF
T, various switches such as a passing object detection switch 12 provided inside and outside the opening are connected, and the opening / closing machine 6 performs corresponding forward / reverse drive or drive stop based on ON / OFF switching of these switches. It is supposed to be done. Here, the passing object detection switch 12 is configured by using a switch such as a photoelectric tube switch and a proximity switch, but when at least one of the passing object detection switches 12 inside and outside the shutter curtain 4 is in a detection state, it is determined that an open signal is input. However, it is set to judge the closing signal only when both the detection switches 12 are in the non-detection state.

Further, the first and second interlock circuits X and Y are connected between the first and second opening / closing control circuits, whereby the mutual shutter curtains 4,
5, the first and second interlock circuits X and Y will be described with reference to FIG. That is, the interlock wiring A of the first opening / closing control circuit is connected to the interlock connection terminal R1b of the first opening / closing control circuit via the terminal LS2c of the second opening / closing control circuit and the lower limit limit switch LSD of the second shutter device 3. And the lower limit limit switch LSD is connected to switch O
When it is switched to the N state (the state where the second shutter curtain 5 reaches the lower limit), the limit terminal LS
2a is set to be wired. Further, the interlock wiring A is wired so as to reach from the limit terminal LS2a to the terminal S2b of the second opening / closing control circuit and the openable signal output switch contact 13 when the lower limit switch LSD is in the ON state, It is wired so that the terminal S2a is connected to the connecting terminal R1a of the first opening / closing control circuit when the switch contact 13 is closed.

The switch contact 13 for outputting the openable signal is opened when the open signal is input to the second shutter device 3, and the interlock circuit X is provided.
Is the lower limit limit switch L of the second shutter device 3.
When SD is in the ON state and the openable signal output switch contact 13 is closed, the first interlock circuit X is energized, whereby an openable signal that allows the opening of the first shutter curtain 4 is generated. It is configured to be output to the first AND circuit 14. Then, in the first AND circuit 14 to which the openable signal is input, the open signal of the first shutter device 2 is input and the switch contact 2
When 1 is closed, the first AND circuit 14 outputs to close the opening circuit of the first opening / closing control circuit so as to open the first shutter curtain 4, whereby the opening / closing device 6 is driven to open. Is set to.

On the other hand, when the lower limit switch LSD of the second shutter device 2 is switched to the OFF state (the state where the first shutter curtain 4 is not in the fully closed state), or when the second shutter device 3 receives the release signal. Is input and the switch contact 13 is opened, the first interlock circuit X is in the open circuit state, the first AND circuit 14 is not energized, and the first shutter curtain 4 is opened. First, the interlock relationship with the second opening / closing control circuit is set to be ignored.

The interlock circuit Y connected to the second opening / closing control circuit is wired between the terminals by the interlock wiring B, like the interlock circuit X of the first opening / closing control circuit. When the second lower limit switch LSD is in the ON state and the openable signal output switch contact 15 is closed, it is determined that the second shutter curtain 4 is allowed to be opened and the second AND circuit 16 is opened. Is configured to be output. In this way, both opening / closing control circuits are provided with opening / closing permission means for both shutter curtains 4, 5.

In the embodiment of the present invention constructed as described above, one shutter curtain is closed in the first and second shutter devices 2 and 3 provided inside and outside the standby chamber 1, respectively. It will be opened only when there is,
In this case, for example, in the case of opening the first shutter curtain 4, the first lower limit switch LSD of the second shutter device 3 is in the ON state, and the first shutter curtain 3 does not receive the opening signal. AND circuit 1
4, an openable signal is output, and the first AND circuit 6 is driven to open by the output of the first AND circuit 14 which receives the openable signal and the open signal of the first shutter device 2 to open the first shutter curtain 4. It will be opened. In this way, one shutter curtain can be opened only when the other shutter curtain is fully closed and there is no open signal, so when there is a simultaneous open signal as in the past. , The lower limit switch is OF
Until the F state is restored, the opening operation is not performed simultaneously, the precedence order of the input of the opening signal is judged, and the opening operation of the preceding shutter curtain 1 is performed. , It is possible to prevent both shutter curtains from malfunctioning.

Of course, the present invention is not limited to the above-mentioned embodiment, and it is not controlled by electric circuit like the first embodiment, but the opening / closing device of each shutter device is controlled by a microcomputer. The present invention can also be implemented in a device configured to be opened / closed by being used for a control command from a control unit configured to be used. In this case, the case where the opening / closing control of each of the switches 6 and 7 is performed by the control command from the corresponding first and second opening / closing control units 17 and 18 is referred to as a second embodiment, and one control is performed. A case where the control is performed by the unit 19 will be described as a third embodiment. First, the control procedure of the first and second opening / closing control units 17 and 18 in the second embodiment will be described with reference to the flow chart shown in FIG.
In this case, since the control procedure of both opening / closing control units 17 and 18 is the same, the control procedure of the first opening / closing control unit 17 will be described here, and the control procedure of the second opening / closing control unit 18 will be shown in parentheses in the figure. The details are omitted as they are shown only by writing. Here, the first opening / closing control unit 17 starts the system by turning on the main switch (not shown),
Initially set, but in this state, the first shutter device 2
If the lower limit limit switch LSD is judged to be in the ON state, and if it is judged to be in the OFF state, that is, not in the fully closed state, the signals from the various switches input to the first opening / closing control unit 17 The first shutter curtain 4 opens and closes based on the input.

On the other hand, the lower limit switch LSD
When it is determined that is the ON state (fully closed state), it is determined whether the opening signal is input, and when it is determined that the opening signal is not input, the second opening / closing control unit 18 is opened. The enable signal is output. On the other hand, when it is determined that the open signal is input, it is subsequently determined whether the openable signal is input from the second opening / closing control unit 18, and when it is determined that the openable signal is input, the first shutter is released. Curtain 4
In this way, it is possible to prevent the shutter curtains 4 and 5 from being simultaneously opened.

Further, FIGS. 6 and 7 show the third embodiment.
In this example, the main routine of the controller 19 is constructed by using the opening / closing control routine of each shutter curtain 4, 5 as a subroutine. Here, the control procedure of the first shutter curtain 4 will be described, and the control procedure of the second shutter curtain 18 will only be shown in parentheses in FIG. 7, and the details thereof will be omitted. Here, in the opening / closing operation of the first shutter curtain 4, first, it is determined whether or not the lower limit switch LSD of the first shutter device 2 is in the ON state, and if it is judged in the OFF state, the opening / closing operation of the first shutter curtain 4 is performed. If it is determined that the ON signal is ON, it is determined whether or not the opening signal is input to the first shutter device 2. If not, the operation is stopped. On the other hand, when the open signal is input to the first shutter device 2, the lower limit switch LSD of the second shutter device 3 is turned on.
The first shutter curtain 4 is set to be opened and closed when it is determined that the state is the state and the release signal is not input to the second shutter device 3. By doing so, The single control unit 19 can control the first and second shutter devices 2 and 3.

Incidentally, in each of the above-mentioned embodiments, when the shutter curtain is opened, only one of them is opened as in the above-mentioned embodiments, and an automatic control mode from the other side. The shutter curtain may be switched to a manual control mode in which the operator can arbitrarily operate the opening regardless of the input of the openable signal. For this purpose, an automatic-manual switch 20 is provided and this switching is performed. The automatic control and the manual control may be selectively used according to the above. By doing so, even if both shutter devices 2 and 3 are stopped at the same time when the opening signals are input to both shutter devices 2 and 3 at the same time. By switching the automatic-manual switch 20 of the shutter device of the above to the manual state, the opening and closing operation can be performed regardless of the other shutter device. It will be possible.

[0018]

In summary, since the present invention is constructed as described above, one of the two electric switchgears provided in the standby chamber is opened only when the other electric switchgear is closed. In this case, one electric switchgear must be allowed to open only when the other electric switchgear is fully closed and no open signal is input to the other electric switchgear. become. As a result, if there is a simultaneous opening signal as in the past, the electric switchgear may open simultaneously until the full-close limit switch is switched. Only the electric switchgear on the side to which the release signal is input earlier is opened, and the malfunction of both electric switchgears can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic side view of a shutter device.

FIG. 2 is an explanatory diagram of a shutter device.

FIG. 3 is an explanatory diagram of an interlock circuit.

FIG. 4 is a block diagram showing a control state of an opening / closing control unit.

FIG. 5 is a flowchart showing a control procedure by first and second opening / closing control units.

FIG. 6 is a flowchart showing a control procedure by one control unit.

FIG. 7 is a flowchart showing a control procedure by one control unit.

FIG. 8 is a flowchart showing an operation procedure of automatic / manual mode switching.

[Explanation of symbols]

 1 Standby Room 2 First Shutter Device 4 First Shutter Curtain 6 Opener 8 Shutter Case 9 Guide Rail 12 Passing Object Detection Switch 13 Switch Contact for Openable Signal Output 14 AND Circuit

Claims (2)

[Claims] 1. An electric switchgear is provided at each of an indoor entrance and an outdoor entrance of a standby room provided at an indoor entrance and an outdoor entrance, and each electric opening and closing device is provided with an opening and closing control unit for controlling opening and closing. When controlling the opening operation of the other electric switchgear when either one of the electric switchgear is in the non-fully closed state, each opening / closing control section has a limit switch for full closing of the corresponding electric switchgear. An openable signal output means for outputting an openable signal to the other opening / closing control unit under the condition that a full-closed detection signal is input from the same and the opening signal of the electric switchgear is not input, and the other-side opening / closing control unit A structure for preventing malfunction in an electrically-operated switchgear for a building, comprising: an opening-closing permitting means for bringing the electrically-operated switchgear into an opening permitting state when an openable signal is input thereto. 2. The opening / closing control unit according to claim 1, wherein
A structure for preventing malfunction of an electrically-operated switchgear for a building, comprising a manual control mode in which opening / closing control can be manually performed even when there is no input of an openable signal from a partner side opening / closing control unit.