JP6757295B2 - Control system for flow pressure type remote control lock - Google Patents

Description

The present invention relates to a control system for a plurality of pressure-type remote-controlled locks.

When multiple doors are installed in the isolation room of a hospital or various laboratories or the front room of a laboratory, if two or more doors are opened at the same time, air flow through the room is generated, so dust from the outside , It is necessary to prevent the invasion of dust. Therefore, in order to prevent inflow into the room without sufficient air cleaning by an air shower or the like in the front room, when one of the plurality of doors is opened, the other door is opened. In order to prevent the door from being opened, an interlock system is used that locks the doors other than the opened door by remote control. By preventing the passage of air, the front room can be kept clean by the air shower.

Further, in the conventional interlock system, an electric lock is generally used as a lock for each door, and a method of electrically controlling these electric locks is used. However, in laboratories that handle dangerous substances such as flammable gas and high-concentration oxygen, if an electric lock that uses a solenoid or motor as a drive source is used, it may cause ignition or explosion due to contact sparks or coil heating. There is.

Therefore, a control system using air pressure has been proposed without using electric power to control a lock to be controlled (hereinafter referred to as a remote control lock).

Japanese Unexamined Patent Publication No. 10-299307

However, in the control system used in the prior art, the other door is locked and does not open while the one door is open, but once a person enters the room and the one door is closed, the other doors are locked. The door can be unlocked and opened. Therefore, if there is frequent entry and exit, if the timing of closing one door and the timing of opening the other door overlap, there is a risk that the door will be opened at the same time. In addition, the door was opened without the front room being completely clean, and there was a risk of dust and dirt entering.

Therefore, as a means for solving the above problems, the control system for the flow pressure type remote control lock according to the present invention is provided with a plurality of doors provided in one room and corresponding to each of the plurality of doors. A fluid pressure circuit for controlling the locked state and the unlocked state of the remote control lock is provided, and the fluid pressure circuit includes a set of flow pressure switch, a switching unit, and a flow pressure cylinder corresponding to each remote control lock. When one door is opened, the flow pressure switch belonging to the corresponding one control unit detects the opened state of the one door and outputs the control flow pressure. By doing so, the drive flow pressure is output from all the switching units belonging to the other control units, and all the flow pressure cylinders belonging to the other control units driven by the drive flow pressure output from the switching unit are the other. All the remote control locks belonging to the control unit are locked, and the remote control lock belonging to the one control unit corresponding to the one door is held in the unlocked state, and at least one of the switching units is held. The switching unit outputs the drive flow after a predetermined time has elapsed from the time when the change in the flow pressure from the flow pressure switch that senses that the door corresponding to the control unit to which the switching unit belongs has been closed is detected. It is configured as a delay switching unit that unlocks the remote control lock that was locked by the drive flow pressure by changing the pressure, and the other switching units correspond to the control unit to which the switching unit belongs. When a change in the flow pressure from the flow pressure switch that senses that the door is closed is detected, the drive flow pressure that was output immediately is changed, and the remote control lock that was locked by the drive flow pressure. It is characterized in that it is composed of a switching valve that unlocks the door.

The fluid pressure circuit controls the remote control lock by the pressure generated by flowing the fluid in the circuit, and the fluid is preferably air or a nonflammable gas. Further, water or a nonflammable liquid can be used as the fluid.

In the present invention, at least one of the plurality of switching units provided may be a delay switching unit, and all the switching units may be composed of delay switching units.

Further, it is desirable that the flow pressure switch is provided with a sensing mechanism for detecting the opened state of the door by a mechanical mechanism. By not being a sensing mechanism by electrical means, the flow pressure switch can be excluded from the causes of ignition accidents caused by electricity in places where dangerous substances such as flammable gas and high-concentration oxygen are handled, and the safety of the entire system This is because it can be enhanced.

Further, in the present invention, when all the doors are closed, the flow pressure switch and the switching unit constituting the plurality of control units are in the valve closed state, and all the remote control locks are in the unlocked state. It is preferably a pressure type remote control lock control system.

Further, the fluid pressure circuit is composed of a driving fluid pressure circuit and a control fluid pressure circuit, and the delay switching unit is composed of a delay timer valve and a timer switching valve, and the timer switching valve. The output port is connected to the timer operation port of the delay timer valve, and the drive fluid pressure circuit branches from the flow pressure source to supply the delay timer valve, supply port of each timer switching valve, and The supply port of each switching valve is connected in parallel, and the drive flow output port of each delay timer valve and the drive flow output port of each switching valve are connected to the corresponding flow pressure cylinder in each control unit. The control fluid pressure circuit branches from the flow pressure source and connects the supply ports of the flow pressure switches in parallel, and from the control flow output port of each flow pressure switch, other than the control unit to which the flow pressure switch belongs. The pilot port of the timer switching valve belonging to all the other control units or the pilot port of the switching valve is connected in parallel, and the remote control lock is the flow pressure cylinder corresponding to the door on which the remote control lock is installed. It is preferable that the timers are connected.

Here, the delay switching unit can arbitrarily set the delay time until the fluid flows by detecting the change in the flow pressure from the flow pressure switch. Specifically, it is preferable that the delay time can be set by operating the dial or the like provided on the delay timer valve constituting the switching unit according to a predetermined delay time. When the delay switching unit is composed of a delay timer valve and a timer switching valve, when a change in the flow pressure from the flow pressure switch is detected, a change in the flow pressure of the delay timer valve to the pilot port is detected. Is detected by the delay timer valve, and the measurement of the delay time is started from this time.

Furthermore, the remote-controlled lock has a lock rod that is urged in a direction protruding from the door front surface, and in the locked state, the lock rod protruding from the door front surface functions as a dead bolt that cannot be retracted. It is preferable that the door lock is used.

In the present invention, the locked state of the remote-controlled lock means a state in which the protruding lock rod cannot be retracted by the operation of the handle or the like interlocking with the lock rod, and the closed door cannot be opened. However, the operation of the handle or the like does not include a means for directly canceling the cause of the inability to open the closed door by thumb turn or key operation. Further, the unlocked state of the remote-controlled lock means that the lock rod is in a state where it can move forward and backward. The door in which the remote-controlled lock is unlocked can be opened from the closed state by retracting the protruding lock rod by operating the handle or the like.

Further, the flow pressure cylinder is driven by receiving a drive flow pressure from the corresponding switching unit, and a locking piece is attached to the lock rod protruding from the door end surface via a transmission mechanism provided in the remote control lock. The remote-controlled lock can be locked by interfering with each other and fixing the lock.

According to the present invention, even after one door that has been opened is closed, the locked state of the other door is not unlocked and the other door cannot be opened until a predetermined time delay elapses. As a result, it is possible to effectively prevent the other doors from being opened at the same time as the timing when one door is closed, and to prevent the generation of airflow through the room provided with a plurality of doors.

According to the present invention, when one of the plurality of doors is opened, the lock can be made to function as a latch bolt that can freely appear and disappear by holding the unlocked state of the remote control lock of the opened door. , A flow pressure type remote control lock control system capable of reliably closing the opened door can be provided.

Further, when all the doors are closed and all the remote control locks are unlocked, the opened door can be surely closed, and when all the doors are closed, no matter what. You can open one of the doors to enter the room without any obstacles.

It is a top view of the interior which shows the outline of a room L1 and a door D11, D12. It is a perspective view which shows an example of the structure of a door D. The outline of the fluid pressure circuit 2A is shown, and it is the circuit diagram when all the doors D11 and D12 are closed. It is a figure which shows the outline of the pneumatic switch 6 installed in the sensing mechanism case 48. It is a top view of the interior which shows the outline of a room L2 and doors D21-D23. The outline of the fluid pressure circuit 2B is shown, and it is the circuit diagram when all the doors D21 to D23 are closed.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted. In the following embodiment, the fluid pressure switch is a pneumatic switch controlled by the air pressure (pneumatic pressure) obtained from the air supplied from the pneumatic source, and the fluid pressure cylinder is a pneumatic switch. A case where a pneumatic cylinder is used will be described. Further, the switching valve, the timer switching valve, and the delay timer valve constituting the switching unit will also be described as having pneumatic specifications.

<First Embodiment>
[Overview of Pneumatic Circuit 2A]
FIG. 1 is a plan view showing an outline of the arrangement of two doors D (D11, D12) provided in one room L1 with the floor surface of the room L1 as the front. According to FIG. 1, doors D11 and doors D12 are arranged on two walls in a room L1 having walls on all sides. Remote control locks 4 (411, 412) are installed on the doors D, and together with the remote control locks 4, a pneumatic switch 6 (which detects that each door D has been changed from the closed state to the open state) ( 611, 612) are provided.

FIG. 2 shows a perspective view of the door D11 installed in the room L1. A remote control lock 411 is installed inside the door D11 on the door end side, and the lock rod 15 protrudes from the door end surface 14 so as to be able to appear and disappear. The lock rod 15 is interlocked with the handle H, and when the remote control lock 411 is in the unlocked state, the door D1 can be opened by immersing the lock rod 15 by turning the handle H. Further, a pneumatic switch 611 housed in the sensing mechanism case 48 is installed at the upper end of the inner surface of the door D11, and the tip of the lever 50 that transmits the open / closed state of the door D11 to the pneumatic switch 611. Is projected from the inner surface of the door D11. On the other hand, a backing plate 52 is provided at the upper end of the door frame W at a position facing the pneumatic switch 611, and when the door D11 is closed, the lever 50 is pressed against the backing plate 52. The pneumatic switch 611 is closed. The mechanism of the door D11 is the same for the door D12.

FIG. 3 is a circuit diagram showing an outline when the door D11 and the door D12 of the control system 1A (hereinafter referred to as the control system 1A) of the flow pressure type remote control lock are closed. The control system 1A according to the present embodiment is composed of a pneumatic circuit 2A as a fluid pressure circuit, and is a pneumatic remote control lock based on the air pressure (pneumatic pressure) obtained from the air supplied from the pneumatic source 3. The locked state and unlocked state of 4 can be controlled remotely.

The pneumatic circuit 2A of FIG. 3 is a control composed of a set of pneumatic switches 6 corresponding to each remote control lock 4, a switching unit 7 (delay switching unit 71, a switching valve 73), and a pneumatic cylinder 8. Two sets of units 91 (control units 911 and 912) are provided. Specifically, the pneumatic switch 611, the delay switching unit 71 composed of the timer switching valve 711 as the switching unit 7, and the delay timer valve 712, and the pneumatic cylinder 811 constitute the control unit 911, and the control unit 911. Corresponds to the door D11 and the remote control lock 411. The pneumatic switch 612, the switching valve 73 as the switching unit 7, and the pneumatic cylinder 812 constitute the control unit 912, and the control unit 912 corresponds to the door D12 and the remote control lock 412. In FIG. 3, the control units 911 and 912 are shown by each range in which the control system 1A is roughly divided into two ranges by a two-dot chain line. Further, in FIG. 3, the delay switching unit 71 is represented by a small range surrounded by the alternate long and short dash line, which is represented within the range of the alternate long and short dash line indicating the corresponding control unit 911.

Further, the pneumatic circuit 2A is composed of a driving pneumatic circuit 211 and a control pneumatic circuit 212. Further, a pneumatic source 3 is connected to the base end of the driving pneumatic circuit 211. The pneumatic source is arranged at a position separated from the room L1 via the driving pneumatic circuit 211, and in the room L1, the mechanism connected to the pneumatic circuit 2A and the pneumatic circuit 2A is electrically connected. What is controlled can be excluded.

In the present embodiment, as shown in FIG. 3, a 3-port type single-acting normally open mechanical valve is used for the pneumatic switch 6. The pneumatic switch 6 is opened when the plunger 49 is brought into a protruding state by the door opening operation of the door D, which will be described later. A master valve (NO type) was used for the timer switching valve 711, and a master valve (NC type) was used for the switching valve 73. The timer switching valve 711 is closed by pressurizing the air pressure from the control pneumatic circuit 212 to the pilot port 7PBa. The switching valve 73 is opened by pressurizing the air pressure from the control pneumatic circuit 212 to the pilot port 7PBc. For the pneumatic switch 6, the timer switching valve 711, and the switching valve 73, other types of mechanical valves and master valves can be used as long as the problems of the present invention can be solved.

As the delay timer valve 712, an off-delay timer type was used in which the air flow in the delay timer valve 712 was cut off after a set time when the pilot port 7PBb was pressurized.

In the state where the pilot port 7PBa of the timer switching valve 711 is not pressurized, the timer switching valve 711 is in the valve open state, and the air pressure from the air pressure source input to the supply port 7Pa of the timer switching valve 711 causes. , The control flow is output from the corresponding timer operation port 7Aa, and pressurizes the pilot port 7PBb of the corresponding delay timer valve 712.

The drive pneumatic circuit 211 branches from the pneumatic source 3 and connects the supply port 7Pb of the delay timer valve 712 and the supply port 7Pc of the switching valve 73 in parallel, and the drive flow output port 7Ab of the delay timer valve 712. The corresponding pneumatic cylinder 811 is connected in the control unit 911, and the corresponding pneumatic cylinder 812 is connected in the control unit 912 from the drive flow output port 7Ac of the switching valve 73.

The control pneumatic circuit 212 branches from the pneumatic source 3 and connects the supply port 7Pa of the timer switching valve 711 and the supply ports 6P (6Pa, 6Pb) of each pneumatic switch 6 in parallel, and each pneumatic pressure. From the control flow output port 6A (6Aa, 6Ab) of the switch 6, the pilot port 7PBa of the timer switching valve 211 that constitutes the switching unit 7 belonging to the control unit 91 other than the control unit 91 to which the pneumatic switch 6 belongs, or the switching. Connect to the pilot port 7PBc of the valve 73. In the present embodiment, the control pneumatic circuit 212 that connects the pneumatic source 3 to the supply port 7Pa of the timer switching valve 711 and the supply port of each pneumatic switch 6 is the drive pneumatic circuit 211. Share the pipeline with a part of.

Specifically, the pipeline connected to the control flow output port 6Aa of the pneumatic switch 611 belonging to the control unit 911 is connected to the pilot port 7PBc of the switching valve 73 belonging to the other control unit 912.
Further, the pipeline connected to the control flow output port 6Ab of the pneumatic switch 612 belonging to the control unit 912 is connected to the pilot port 7PBa of the timer switching valve 711 belonging to the other control unit 911.

Further, the control flow output port 7Aa of the timer switching valve 711 constituting the delay switching unit 71 is connected to the pilot port 7Pb of the delay timer valve 712 also forming the delay switching unit 71 by a control pneumatic circuit 212. In the present embodiment, since the timer switching valve 711 is a master valve (NO type), the pneumatic switch 612 is opened in the closed state to pressurize the pilot port 7PBb of the delay timer valve 712.

Each pneumatic switch 6 is provided with an exhaust port 6R (6Ra, 6Rb), and is connected to the silencer NC from the exhaust port via the exhaust circuit 213. When the door D, which has been opened, is closed, the pneumatic switch 6 installed on the door D is closed, and the pneumatic pressure applied to the control pneumatic circuit 212 is applied to the exhaust port 6R. Is exhausted from the silencer NC via the exhaust circuit 213. Further, the switching valve 73 is provided with an exhaust port 7Rc, and when the air pressure in the control air pressure circuit 212 is exhausted from the air pressure switch 611, the air pressure is received from the air pressure switch 611. As the switching valve 73 is closed, the air pressure pressurized to the drive pneumatic circuit 211 is exhausted from the exhaust port 7Rc from the silencer NC via the exhaust circuit 213. In FIG. 3, the exhaust circuit 213 connected to the exhaust ports 7Ra and 7Rc is omitted in the middle.

[Explanation of operation of pneumatic switch 6]
As shown in FIG. 2, a sensing mechanism case 48 containing a pneumatic switch 6 for detecting the opening / closing of the door D is attached to the inner surface of the door D.

As shown in FIG. 4, the pneumatic switch 6 includes a plunger 49 that is constantly urged in the protruding direction, a lever 50 that pushes the plunger 49, and a valve body that opens by the protrusion of the plunger 49 (not shown). Does not) and consists of. Further, a drive pneumatic circuit 211 is connected to the supply port 6P of the pneumatic switch 6, a control pneumatic circuit 212 is connected to the control flow output port 6A, and an exhaust circuit 213 is connected to the exhaust port 6R. Being done.

The lever 50 is formed in the shape of a leaf spring whose base end is fixed to the end surface of the outer shell of the pneumatic switch 6 and is installed so as to sandwich the plunger 49, and the tip portion 50a provided with a rotating body is provided. It is projected from the opening 51 of the sensing mechanism case 48.

When the door D is in the closed state, as shown in FIG. 4A, the lever 50 is pressed against the backing plate 52 provided on the door frame W to push the plunger 49 and close the pneumatic switch 6. Hold in valve state. Then, when the door D is opened, the lever 50 is separated from the backing plate 52, so that the pressing force from the plunger 49 loaded on the lever 50 is released as shown in FIG. 4B, and the plan is released. The jar 49 protrudes and the pneumatic switch 6 is opened.

[Explanation of operation of pneumatic circuit 2A]
In FIG. 1, when all of the doors D11 and D12 provided in the room L1 are closed, air pressure is always supplied from the air pressure source 3 in FIG. 3, but the air pressure switches 611 and 612 All of them are closed. At this time, the pilot port 7PBa of the timer switching valve 711 is not pressurized, and the timer switching valve 711 is in the open state. Therefore, the air pressure from the air pressure source input to the supply port 7Pa of the timer switching valve 711 is output as a control flow from the timer operation port 7Aa, and pressurizes the pilot port 7PBb of the delay timer valve 712.

As a result, since the delay timer valve 712 and the switching valve 73 are in the closed state, the pneumatic cylinders 811 and 812 are not pressurized. That is, when both the doors D11 and D12 are closed, the remote control locks 411 and 412 are all unlocked, and the occupant can enter the room L1 through any of the doors D11 and D12. can do.

1. 1. Explanation when the door D12 is opened and the room L1 is entered (Explanation of unlocking delay operation by the delay timer valve 712)
The case where the entrant opens the door D12 to enter the room L1 and then leaves the room L1 will be described. A person entering the room can grab and turn the handle H of the door D12 in the closed state, open the door D12, and enter the room L1. At this time, since the remote control lock 412 is in the unlocked state, the lock rod 15 can be retracted by turning the handle H. Then, when the door D12 is pulled, the lever 50 is separated from the backing plate 52, so that the pneumatic switch 612 belonging to the control unit 912 corresponding to the door D12 is opened, and the pneumatic pressure is output from the control flow output port 6Ab. .. The air pressure output from the control flow output port 6Ab is transmitted to the pilot port 7PBa of the timer switching valve 711 belonging to the control unit 911 via the control air pressure circuit 212.

The timer switching valve 711 closes by receiving the air pressure to the pilot port 7PBa, and stops the pressurization from the timer operation port 7Aa to the pilot port 7PBb of the delay timer valve 712. At this time, the air pressurized to the pilot port 7PBb is exhausted from the exhaust port 7Ra of the timer switching valve 711 to the exhaust circuit 213. Immediately after the pressurization to the pilot port 7PBb is stopped, the air flow from the air pressure source 3 passes through the delay timer valve 712, and from the control flow output port 7Ab via the drive pneumatic circuit 211, the control unit 911. Pneumatic pressure is transmitted to the pneumatic cylinder 811 belonging to.

The pneumatic cylinder 811 that has received the pneumatic pressure projects the rod 10 to lock the remote control lock 411 belonging to the control unit 911. As a result, since the door D11 cannot be opened while the door D12 is open, the two doors do not open at the same time in the room L1 and the generation of air flow passing through the room L1 can be prevented.

On the other hand, when the door D12 is opened, the remote control lock 411 is locked and the door D11 is held in the closed state as described above. Therefore, from the circuit diagram shown in FIG. 3, the air pressure is output from the switching valve 73. Not done. Therefore, since the remote control lock 412 installed on the door D12 is held in the unlocked state, the lock rod 15 functions as a latch bolt that can freely appear and disappear. As a result, when the opened door D12 is closed again, the lock 15 is pushed into the door frame W and immerses itself in the remote control lock 412. Therefore, the door D12 is housed in the door frame W and the door is closed. can do.

When the occupant enters the room L1, the opened D12 fits in the door frame W again and is closed. When the door D12 is in the closed state, the lever 50 presses against the backing plate 52 and the plunger 49 is pushed in to close the pneumatic switch 612. From the pneumatic switch 612 in the closed valve state, the pneumatic pressure for control is released from the pneumatic pressure circuit 212 for control via the exhaust port 6Rb.

As a result, the timer switching valve 711 is opened to pressurize the pilot port 7PBb of the delay timer valve 712 again. At this time, the delay timer valve 712, which has detected the pressurization of the pilot port 7PBb, closes the valve after the set delay time elapses, and releases the pneumatic pressure applied to the pneumatic cylinder 811.

When the pneumatic pressure is released from the pneumatic cylinder 811, the rod 10 is immersed in the original state by the spring provided inside the cylinder body 11, and the remote control lock 411 is unlocked. Therefore, even after the entrant enters the room L1 from the door D12 and the door D12 is closed, the door D11 remains locked for the set delay time, and the occupant has elapsed the delay time. You cannot leave the room L1 by opening the door D11 until you do.

As a result, it is possible to effectively prevent the other door D11 from being opened at the same time as the timing when the one door D12 is closed, and to prevent the generation of airflow passing through the room L1.

2. 2. Description of the Case of Opening the Door D11 and Entering the Room L1 On the other hand, in the present embodiment, a case where the entrant tries to enter the room L1 by opening the door D11 will be described. A person entering the room can grab and turn the handle H of the door D11 in the closed state, open the door D11, and enter the room L1. At this time, since the remote control lock 411 is in the unlocked state, the lock rod 15 can be retracted by turning the handle H. Then, when the door D11 is pulled, the lever 50 is separated from the backing plate 52, so that the pneumatic switch 611 belonging to the control unit 911 corresponding to the door D11 is opened, and the pneumatic pressure is output from the control flow output port 6Aa. .. The air pressure output from the control flow output port 6Aa is transmitted to the pilot port 7PBc of the switching valve 73 belonging to the control unit 912 via the control air pressure circuit 212.

The switching valve 73 opens in response to the air pressure to the pilot port 7PBc, and transmits the air pressure from the drive flow output port 7Ac to the air pressure cylinder 812 belonging to the control unit 912 via the drive air pressure circuit 211.

The pneumatic cylinder 812 that has received the pneumatic pressure projects the rod 10 to lock the remote control lock 412 belonging to the control unit 912. As a result, since the door D12 cannot be opened while the door D11 is open, the two doors do not open at the same time in the room L1 and the generation of air flow passing through the room L1 can be prevented.

On the other hand, even if the door D11 in the present invention is opened, the timer switching valve 711 is not opened, so that the remote control lock 411 is held in an unlocked state in which the lock rod 15 can freely appear and disappear.

When the entrant enters the room L1, the door of the opened D11 fits in the door frame W again and is closed. When the door D11 is in the closed state, the lever 50 presses against the backing plate 52 and the plunger 49 is pushed in to close the pneumatic switch 611. From the pneumatic switch 611 in the closed valve state, the pneumatic pressure for control is released from the pneumatic pressure circuit 212 for control via the exhaust port 6Ra. As a result, the switching valve 73 is closed, the air pressure is released from the drive pneumatic circuit 211 from the exhaust port 7Rc of the switching valve 73, and the air pressure is also released from the pneumatic cylinder 812.

When the pneumatic pressure is released from the pneumatic cylinder 812, the rod 10 is immersed in the original state by the spring provided inside the cylinder body 11, and the remote control lock 412 is unlocked. Therefore, when the entrant enters the room L1 through the door D11, the door D12 is immediately unlocked again after the door D11 is closed, and the entrant can leave the room L1 from the door D12.

According to the first embodiment, it is effective when passing through the room L1 from the one door D12 to the other door D11, particularly when it is desired to prevent the generation of an air flow passing through the room L1. It is not necessary to provide a delay switching unit 71 for passing through the room L1 from the other door D11 to the one door D12, and the pneumatic circuit 2A can be simplified by using the switching valve 73.

<Second embodiment>
[Overview of Pneumatic Circuit 2]
FIG. 5 is a plan view showing an outline of the arrangement of a plurality of doors D (D21, D22, D23) provided in one room L2 with the floor surface of the room L2 as the front. According to FIG. 5, the door D21, the door D22, and the door D23 are arranged on the three walls of the room L2 having walls on all sides, respectively. Remote control locks 4 (421, 422, 423) are installed on each door D, and together with each remote control lock 4, a pneumatic switch that detects that each door D has been changed from the closed state to the open state. 6 (621, 622, 623) is provided.

FIG. 2 shows a perspective view of the door D21 installed in the room L2. A remote control lock 421 is installed inside the door D21 on the door end side, and the lock rod 15 projects from the door end surface 14 so as to be able to appear and disappear. The lock rod 15 is interlocked with the handle H, and when the remote control lock 421 is in the unlocked state, the door D21 can be opened by immersing the lock rod 15 by turning the handle H. Further, a pneumatic switch 621 housed in the sensing mechanism case 48 is installed at the upper end of the inner surface of the door D21, and the tip of the lever 50 that transmits the open / closed state of the door D21 to the pneumatic switch 621. Is projected from the inner surface of the door D21. On the other hand, a backing plate 52 is provided at a position facing the pneumatic switch 621 at the upper end of the door frame W, and when the door D21 is closed, the lever 50 is pressed against the backing plate 52. The pneumatic switch 621 is closed. The mechanism of the door D21 is the same for the doors D22 and D23.

FIG. 6 is a circuit diagram showing an outline when the doors D21 to D23 of the control system 1B (hereinafter referred to as the control system 1B) of the flow pressure type remote control lock are closed. The control system 1B according to the present embodiment is composed of a pneumatic circuit 2B as a fluid pressure circuit, and is a pneumatic remote control lock based on the air pressure (pneumatic pressure) obtained from the air supplied from the pneumatic source 3. The locked state and unlocked state of 4 can be controlled remotely.

The pneumatic circuit 2B of FIG. 6 includes three sets of control units 92 (control units 921, which are composed of a set of pneumatic switches 6, a switching valve 7, and a pneumatic cylinder 8 corresponding to each remote control lock 4. 922, 923) Prepare. Specifically, the pneumatic switch 621, the delay switching unit 72A composed of the timer switching valve 721A as the switching unit 7, and the delay timer valve 722A, and the pneumatic cylinder 821 constitute the control unit 921, and the control unit 921. Corresponds to the door D21 and the remote control lock 401. The pneumatic switch 622, the delay switching unit 72B composed of the timer switching valve 721B as the switching unit 7, and the delay timer valve 722B, and the pneumatic cylinder 822 form the control unit 922, and the control unit 922 is the door D22 and the remote. Corresponds to the operation lock 422. The pneumatic switch 623, the delay switching unit 72C composed of the timer switching valve 721C as the switching unit 7, and the delay timer valve 722C, and the pneumatic cylinder 823 constitute the control unit 923, and the control unit 923 is the door D23 and the remote. Corresponds to the operation lock 423. In FIG. 6, the control units 921, 922, and 923 are shown by each range in which the control system 1B is roughly divided into three ranges by a two-dot chain line. Further, in FIG. 6, the delay switching units 72A, 72B, and 72C are represented by a small range surrounded by the alternate long and short dash line, which is represented within the range of the alternate long and short dash line indicating the control unit 92 corresponding to each.

Further, the pneumatic circuit 2B is composed of a driving pneumatic circuit 221 and a control pneumatic circuit 222. Further, a pneumatic source 3 is connected to the base end of the drive pneumatic circuit 221. The pneumatic source is arranged at a position separated from the room L2 via the driving pneumatic circuit 221. In the room L, the pneumatic circuit 2B and the mechanism connected to the pneumatic circuit 2B are electrically connected to the pneumatic circuit. What is controlled can be excluded.

In the present embodiment, as shown in FIG. 6, a 3-port type single-acting normally open mechanical valve is used for the pneumatic switch 6. The pneumatic switch 6 is opened when the plunger 49 is brought into a protruding state by the door opening operation of the door D, which will be described later. A master valve (NO type) was used for the timer switching valve 721 (721A, 721B, 721C). The timer switching valve 721 is closed by pressurizing the air pressure from the control pneumatic circuit 222 to the respective pilot ports 7PBd, 7PBe, and 7PBf. For the pneumatic switch 6 and the timer switching valve 721, other types of mechanical valves and master valves can be used as long as the problems of the present invention can be solved.

The delay timer valve 722 (722A, 722B, 722C) has an off-delay timer type in which the air flow in the delay timer valve 722 is cut off after a set time when the pilot ports 7PBg, 7PBh, and 7PBi are pressurized. I used the one.

In the state where the pilot port of the timer switching valve 721 is not pressurized, the timer switching valve 721 is in the valve open state, and the air pressure source input to the supply ports 7Pd, 7Pe, 7Pf of the timer switching valve 721 is used. Due to the air pressure, the control flow is output from the corresponding timer operation ports 7Ad, 7Ae, 7Af, and the pilot port of the corresponding delay timer valve 722 is pressurized.

The drive pneumatic circuit 221 branches from the pneumatic source 3 and connects the supply ports 7Pg, 7Ph, 7Pi of the delay timer valve 722 in parallel, and from the drive flow output ports 7Ag, 7Ah, 7Ai of the delay timer valve 722. The corresponding pneumatic cylinder 8 is connected in the control unit 92.

The control pneumatic circuit 222 branches from the pneumatic source 3 and connects the supply ports 7Pd, 7Pe, 7Pf of the timer switching valve 721 and the supply ports 6P (6Pd, 6Pe, 6Pf) of each pneumatic switch 6 in parallel. At the same time, from the control flow output ports 6A (6Ad, 6Ae, 6Af) of each pneumatic switch 6, the pilot port of the timer switching valve 721 belonging to all the control units 92 other than the control unit 92 to which the pneumatic switch 6 belongs. Connect in parallel. In the present embodiment, the control pneumatic circuit 222 that connects the pneumatic source 3 to the supply port of the timer switching valve 721 and the supply port of each pneumatic switch 6 is the drive pneumatic circuit 221. Share the pipeline with some.

Specifically, the pipeline connected to the control flow output port 6Ad of the pneumatic switch 621 belonging to the control unit 921 branches in the middle, and the pilot port 7PBe of the timer switching valve 721B belonging to the other control unit 922, and It is connected to the pilot port 7PBf of the timer switching valve 721C belonging to the control unit 923.
Further, the pipeline connected to the control flow output port 6Ae of the pneumatic switch 622 belonging to the control unit 922 branches in the middle, and the pilot port 7PBd of the timer switching valve 721A belonging to the other control unit 921 and the control unit 923. It is connected to the pilot port 7PBf of the timer switching valve 721C belonging to.
Further, the pipeline connected to the control flow output port 6Af of the pneumatic switch 623 belonging to the control unit 923 branches in the middle, and the pilot port 7PBd of the timer switching valve 721A belonging to the other control unit 921 and the control unit 922. It is connected to the pilot port 7PBe of the timer switching valve 721B belonging to.

An OR element 521 is arranged in front of the upstream side of the pilot port 7PBd, and the air pressure sent from the control flow output port 6Ae or the control flow output port 6Af is integrated into one pipeline to the pilot port 7PBd. introduce.
An OR element 522 is arranged in front of the upstream side of the pilot port 7PBe, and the air pressure sent from the control flow output port 6Ad or the control flow output port 6Af is integrated into one pipeline to form the pilot port 7PBe. introduce.
An OR element 523 is arranged in front of the upstream side of the pilot port 7PBf, and the air pressure sent from the control flow output port 6Ad or the control flow output port 6Ae is collected in one pipeline to the pilot port 7PBf. introduce.

Each pneumatic switch 6 is provided with an exhaust port 6R (6Rd, 6Re, 6Rf) and is connected to the silencer NC from the exhaust port via the exhaust circuit 223. When the door D, which has been opened, is closed, the pneumatic switch 6 installed on the door D is closed, and the pneumatic pressure applied to the control pneumatic circuit 222 is applied to the exhaust port 6R. Is exhausted from the silencer NC via the exhaust circuit 223.

[Explanation of operation of pneumatic switch 6]
As shown in FIG. 2, a sensing mechanism case 48 containing a pneumatic switch 6 for detecting the opening / closing of the door D is attached to the inner surface of the door D.

As shown in FIG. 4, the pneumatic switch 6 includes a plunger 49 that is constantly urged in the protruding direction, a lever 50 that pushes the plunger 49, and a valve body that opens by the protrusion of the plunger 49 (not shown). Does not) and consists of. Further, a drive pneumatic circuit 221 is connected to the supply port 6P of the pneumatic switch 6, a control pneumatic circuit 222 is connected to the control flow output port 6A, and an exhaust circuit 223 is connected to the exhaust port 6R. Being done.

The lever 50 is formed in the shape of a leaf spring whose base end is fixed to the end surface of the outer shell of the pneumatic switch 6 and is installed so as to sandwich the plunger 49, and the tip portion 50a provided with a rotating body is provided. It is projected from the opening 51 of the sensing mechanism case 48.

When the door D is in the closed state, as shown in FIG. 4A, the lever 50 is pressed against the backing plate 52 provided on the door frame W to push the plunger 49 and close the pneumatic switch 6. Hold in valve state. Then, when the door D is opened, the lever 50 is separated from the backing plate 52, so that the pressing force from the plunger 49 loaded on the lever 50 is released as shown in FIG. 4B, and the plan is released. The jar 49 protrudes and the pneumatic switch 6 is opened.

The pneumatic switch 6 belonging to one control unit 92 is opened, and pneumatic pressure is applied from the delay switching unit 72 belonging to the other control unit 92 to the corresponding pneumatic cylinder 8 via the driving pneumatic circuit 221. Then, the remote control lock 4 is locked.

[Explanation of operation of pneumatic circuit 2B]
In FIG. 5, when all the doors D21 to D23 provided in the room L2 are closed, the air pressure is always supplied from the air pressure source 3 in FIG. 6, but the air pressure switches 621 to 623 Both are in a closed state. At this time, the pilot ports 7PBd, 7PBe, and 7PBf of the timer switching valve 721 are not pressurized, and the timer switching valve 721 is in the open state. Therefore, the air pressure from the air pressure source input to the supply ports 7Pd, 7Pe, 7Pf of the timer switching valve 721 is output as a control flow from the timer operation ports 7Ad, 7Ae, 7Af, and the pilot of the delay timer valve 722. Pressurize the port.

As a result, the delay timer valves 722A to 722C are closed, so that the pneumatic cylinders 821 to 823 are not pressurized. That is, when all the doors D21 to D23 are closed, all the remote control locks 421 to 423 are unlocked, and the entrant enters the room L2 from any of the doors D21 to D23. be able to.

1. 1. Explanation when the door D21 is opened and the room L2 is entered (Explanation of unlocking delay operation by the delay timer valve 722)
Here, a case where a resident tries to enter the room L2 by opening the door D21 will be described. A person entering the room can grab and turn the handle H of the door D21 in the closed state, open the door D21, and enter the room L2. At this time, since the remote control lock 421 is in the unlocked state, the lock rod 15 can be retracted by turning the handle H. Then, when the door D21 is pulled, the lever 50 is separated from the backing plate 52, so that the pneumatic switch 621 belonging to the control unit 921 corresponding to the door D21 is opened, and the pneumatic pressure is output from the control flow output port 6Ad. .. The air pressure output from the control flow output port 6Ad is simultaneously transmitted to the pilot ports 7PBe and 7PBf of the timer switching valves 721B and 721C belonging to the control units 922 and 923 other than the control unit 921 via the control air pressure circuit 222. To.

The timer switching valves 721B and 721C are closed by receiving air pressure to the pilot ports 7PBe and 7PBf, and stop the pressurization from the timer operation port 7Ad to the pilot port 7PBh of the delay timer valve 722B and the pilot port 7PBi of the 722C. At this time, the air pressurized to the pilot ports 7PBe and 7PBf is exhausted to the exhaust circuit 223 from the exhaust ports 7Re and 7Rf of the timer switching valves 721B and 721C. Immediately after the pressurization to the pilot ports 7PBh and 7PBi is stopped, the air flow from the air pressure source 3 passes through the delay timer valves 722B and 722C, and the drive pneumatic circuit 221 from the control flow output ports 7Ah and 7Ai. Pneumatic pressure is transmitted to the pneumatic cylinder 822 belonging to the control unit 922 and the pneumatic cylinder 823 belonging to the control unit 923 via. In FIG. 6, the exhaust circuit 223 connected to the exhaust ports 7Rd, 7Re, and 7Rf is omitted in the middle.

The pneumatic cylinders 822 and 823 that have received the pneumatic pressure project their respective rods 10 to lock the remote control locks 422 and 423 belonging to the control units 922 and 923. As a result, since the doors D22 and D23 cannot be opened while the door D21 is open, two or more doors are not opened at the same time in the room L2, and the generation of air flow passing through the room L2 is prevented. Can be done.

On the other hand, when the door D21 is opened, the remote control locks 422 and 423 are locked and the doors D22 and D23 are held in the closed state as described above. Therefore, from the circuit diagram shown in FIG. 6, the delay timer valve 722A No air pressure is output from. Therefore, since the remote control lock 421 installed on the door D21 is held in the unlocked state, the lock rod 15 functions as a latch bolt that can freely appear and disappear. As a result, when the opened door D21 is closed again, the lock rod 15 is pushed into the door frame W and immerses itself in the remote control lock 421. Therefore, the door D21 is housed in the door frame W and the door is closed. Can be.

When the entrant enters the room L2, the opened D21 fits in the door frame W again and is closed. When the door D21 is in the closed state, the lever 50 presses against the backing plate 52 and the plunger 49 is pushed in to close the pneumatic switch 621. From the pneumatic switch 621 in the closed valve state, the pneumatic pressure for control is released from the pneumatic pressure circuit 222 for control via the exhaust port 6Rd.

As a result, the timer switching valves 721B and 721C are opened to pressurize the pilot ports 7PBh and 7PBi of the delay timer valves 722B and 722C again. At this time, the delay timer valves 722B and 722C that detected the pressurization to the pilot ports 7PBh and 7PBi were closed after the set delay time had elapsed, and the air was pressurized to the pneumatic cylinders 822 and 823. Relieve pressure.

When the pneumatic pressure is released from the pneumatic cylinders 822 and 823, the rod 10 is immersed in the original state by the spring provided inside the cylinder body 11, and the remote control locks 422 and 423 are unlocked. Therefore, even after the entrant enters the room L2 from the door D21 and the door D21 is closed, the doors D22 and D23 remain locked during the set delay time, and the entrant stays in the locked state for the delay time. The door D22 or the door D23 cannot be opened to leave the room L2 until the time has passed.

As a result, it is possible to effectively prevent the other door D22 or the door D23 from being opened at the same time as the timing when the one door D21 is closed, and it is possible to prevent the generation of an air flow passing through the room L2. Further, according to the present invention, the effect of preventing the generation of air flow passing through the room L2 can be exerted on the other door D when entering the room L2 from either the door D22 or the door D23. it can.

In the present embodiment, it is also possible to replace a part of the delay switching unit 72 with the switching valve 73 used in the first embodiment.

1A, 1B Control system 2A, 2B Pneumatic circuit 4 Remote control lock 611, 612 Pneumatic switch 7 Switching unit 711, 721 Timer switching valve 712, 722 Delay timer valve 73 Switching valve 8 Pneumatic cylinder 9 Control unit 15 Lock 杆 211 , 212 Pneumatic circuit for drive 212, 222 Pneumatic circuit for control D door L1, L2 Room

Claims (3)

Multiple doors in one room,
A fluid pressure circuit for controlling the locked state and the unlocked state of the remote-controlled lock, which is installed corresponding to each of the plurality of doors, is provided.
The fluid pressure circuit includes a plurality of control units composed of a set of flow pressure switches, switching units, and flow pressure cylinders corresponding to the remote control locks.
When one door is opened, the flow pressure switch belonging to the corresponding one control unit senses the opened state of the one door and outputs the control flow pressure to output all the control flow pressures belonging to the other control units. The drive flow pressure is output from the switching unit, and all the flow pressure cylinders belonging to the other control unit driven by the drive flow pressure output from the switching unit lock all the remote control locks belonging to the other control unit. In addition to the locked state, the unlocked state of the remote control lock belonging to the one control unit corresponding to the one door is maintained.
A predetermined time has elapsed since at least one of the switching units detected a change in flow pressure from the flow pressure switch that sensed that the door corresponding to the control unit to which the switching unit belongs was closed. Later, it was configured as a delay switching unit that changes the output drive flow pressure to unlock the remote-controlled lock that was locked by the drive flow pressure.
When the other switching unit detects a change in the flow pressure from the flow pressure switch that senses that the door corresponding to the control unit to which the switching unit belongs is closed, the drive flow pressure that was output immediately changes. A control system for a flow pressure type remote control lock, which comprises a switching valve that unlocks the remote control lock that was locked by the drive flow pressure. The claim is characterized in that, when all the doors are closed, the flow pressure switches and the switching units constituting the plurality of control units are in the closed state, and all the remote control locks are in the unlocked state. The control system for the flow pressure type remote control lock according to 1. The fluid pressure circuit is composed of a driving fluid pressure circuit and a control fluid pressure circuit.
The delay switching unit is composed of a delay timer valve and a timer switching valve.
The output port of the timer switching valve is connected to the timer operation port of the delay timer valve.
The drive fluid pressure circuit branches from the flow pressure source to connect the supply port of each delay timer valve, the supply port of each timer switching valve, and the supply port of each switching valve in parallel, and each delay. The drive flow output port of the timer valve and the drive flow output port of each switching valve are connected to the corresponding flow pressure cylinder in each control unit.
The control fluid pressure circuit branches from the flow pressure source and connects the supply ports of the flow pressure switches in parallel, and from the control flow output port of each flow pressure switch, other than the control unit to which the flow pressure switch belongs. Connect the pilot port of the timer switching valve belonging to all the other control units or the pilot port of the switching valve in parallel.
The control system for a flow pressure type remote control lock according to claim 1 or 2, wherein the remote control lock is connected to a flow pressure cylinder corresponding to a door on which the remote control lock is installed.

Images