JPH09256700A - Locking device in flame-provided area - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically lock/unlock an open/closed body for a structure set up in a flame-prohibited hazardous area, save manpower in management and improve workability. SOLUTION: A locking device has a locking mechanism 5 in a mechanical structure to lock/unlock an open/closed body 4 for a structure set up in a hazardous area I such as a flame-prohibited gas station and an operation part 16 arranged out of a hazardous area 0 and formed with a lever handle to operate the locking/unlocking of the locking mechanism 5 via a wire 12 connected to the locking mechanism 5. It is provided with a controller 14 to electrically control the operation of the operator 16 and a detector 22 to detect the locking/ unlocking condition of the locking mechanism 5. In this way, the locking mechanism 5 in a mechanical structure is remote-controlled, so that there is no possibility of ignition in the flame-prohibited hazardous area I in and possible to perform locking/unlocking operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device in a fire-prohibited area provided on an opening / closing body of a structure for storing petroleum products, etc., which is installed in a dangerous place such as a gas station where fire is strictly prohibited. Is.

[0002]

2. Description of the Related Art Gas stations and the like handle a large number of types of petroleum products and store these petroleum products. Therefore, the storage tank is buried underground and explosive dangerous substances are stored. Therefore, it is a dangerous area where fire is strictly prohibited, and it is stipulated by law that it should be an explosion-proof area. The petroleum products are carried into the storage tank through a carry-in port provided on the ground.

The entrance of this storage tank is surrounded by a generally box-shaped structure installed on the premises of a gas station, and a lid-like opening / closing member is provided so that it cannot be opened and closed easily. As described above, a padlock or the like is used, and the lock is managed by a manager who is a dangerous material handler who works at a gas station. When the petroleum product is put into the tank through the carry-in port, the administrator unlocks the padlock and then the carry-in operator carries it in from the tank truck.

[0004]

However, in the above-mentioned carrying-in method in the handling of dangerous substances such as petroleum products, the manager for managing the carrying-in port of the storage tank corresponds to the carrying-in operator. You have to lock and unlock the padlock, and there is the complexity of managing the key of this padlock.
Further, since workability is low, automation of locking / unlocking the opening / closing body covering the carry-in port has been desired, and such automation has not been realized so far.

In order to solve the above problems, the present invention aims to automate the locking / unlocking of the opening / closing member of the structure installed in a dangerous place where fire is strictly prohibited, and the labor saving and workability of its management. It is an object of the present invention to provide a locking device in a fire-prohibited area, which is capable of improving the above.

[0006]

[Means for Solving the Problems] Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The lock device in the fire prohibition area of the present invention is
A lock mechanism section 5 having a mechanical structure for locking and unlocking the opening / closing body 4 of the structure 1 installed in the dangerous area I where fire is strictly prohibited;
The control unit 14 is disposed outside the dangerous place O, is connected to the lock mechanism unit 5, and electrically controls the locking / unlocking operation of the lock mechanism unit 5.

Further, the lock device in the fire-prohibited area according to the present invention includes a lock mechanism portion 5 having a mechanical system structure for locking and unlocking the opening / closing body 4 of the structure 1 installed in the dangerous area I where the fire is strictly prohibited, A control that has a connecting portion 12 that is disposed outside the dangerous area O and that is connected to the locking mechanism portion 5 and that controls the locking / unlocking operation of the locking mechanism portion 5 by driving the connecting portion 12 by an electric signal. And a section 14 are provided.

Further, the lock device in the fire-prohibited area according to the present invention includes a lock mechanism portion 5 having a mechanical system structure for locking and unlocking the opening / closing body 4 of the structure 1 installed in the dangerous area I where the fire is strictly prohibited, The lock mechanism portion 5 is disposed outside the dangerous area O.
And a control unit 14 electrically connected to the lock mechanism unit 5 for operating the locking / unlocking operation of the lock mechanism unit 5, and electrically controlling the operation of the operation unit 16.

The control unit 14 controls the lock mechanism unit 5
The detection unit 22 for detecting the locked / unlocked state may be provided.

With such a structure, the structure 1 in the hazardous area I can lock and unlock the opening / closing body 4 by the control mechanism 14 outside the dangerous area O in the locking mechanism section 5. That is, in the hazardous area I, there is a lock mechanism section 5 having a mechanical structure without an electrical structure,
An electrical structure is provided outside the hazardous area O, and the lock mechanism unit 5 is remotely operated. As a result, there is no danger of ignition in the dangerous area I where fire is strictly prohibited,
It becomes possible to lock and unlock.

[0011]

1 is a schematic perspective view showing an embodiment of a lock device in a fire strictly prohibited area according to the present invention, and FIG. 2 is a schematic configuration perspective view of the lock device.

The lock device of the present embodiment is used, for example, as described in the prior art, to manage the inlet of petroleum products such as gasoline in a gas station as a dangerous place where fire is strictly prohibited. Specifically, it is disposed in the structure 1 surrounding the carry-in port 2 for this petroleum product.

This structure 1 is installed in a gas station site I and is formed in a rectangular box shape, and an upper surface of a main body 3 is formed with an opening, and a lid body as an opening / closing body covers the opening. 4 is provided, and one side at the back is connected to the main body 3 by a hinge so as to swing and open.

On the side of the free end of the lid body 4, a lock mechanism portion 5 is provided.
The substantially ring-shaped engaging convex portion 6 constituting the above is provided in a protruding manner.
Further, a lock mechanism portion 5 main body is provided on the outer side surface 3a of the opening edge portion of the main body 3 corresponding to the free end edge side of the lid body 4.

The lock mechanism portion 5 has a mechanical structure,
The engaging projection 6 and the claw 7 are generally configured.

As shown in FIG. 1, the claw 7 of the lock mechanism portion 5 is arranged in a substantially concave case 8 having a groove-shaped opening 9 formed at the substantially center of the upper edge thereof. As shown in FIG. 2, the middle portion is bent and formed into a substantially L-shape, and a disk-shaped substrate 10 is provided at the base end, and a shaft support portion 11 provided at the center of the substrate 10 is provided. Thus, the inside of the case 8 can be freely swung, and the tip of the claw 7 can be moved back and forth within the opening 9 at the upper edge of the case 8.

Further, to the base plate 10 of the claw 7, two ends 12a of a pair of wires 12 as connecting parts are connected at two positions in the vicinity of the peripheral edges opposed to each other with the center thereof sandwiched. The wires 12 are covered with a flexible tube 13 and slidable inside the tube 13.

By pulling these wires 12, the claw 7 is rotated.

Each wire 12 extends from the lower side of the case 8 and extends along the main body 3 of the structure, and the other end 12b of the wire 12 is outside the fire prohibition area in the gas station where the structure 1 is installed. O, for example, is guided to the inside of a building on the premises of a gas station or to the outside of the premises of the gas station, and is connected to a control unit 14 arranged outside the fire prohibition area O.

In the present embodiment, the control unit 14 is provided with an operation unit 16 and a detection unit 22, each of which is arranged in one housing 15 as shown in FIG. .

First, the operating portion 16 includes a lever handle 17
And a wire connecting plate 20. The lever handle 17 is formed in a substantially L-shape having a shaft portion 18 and a grip portion 19 and is bent in the middle, and is positioned in the substantially center of the housing 15 so that the shaft portion 18 is horizontally supported. It is arranged so as to be rotatable.

The wire connecting plate 20 is formed in a disk shape, and the center thereof is the shaft portion 18 of the lever handle 17.
Is fixed to the lever handle 17 and is substantially integrated with the lever handle 17. As shown in FIG. 2, the wire connecting plate 20 has an engaging recess 21 formed in a part of the peripheral edge thereof, and the other ends of the pair of wires 12b are located in the vicinity of both peripheral edges sandwiching the plate surface center. Are connected to each of the two locations.

A mover (not shown) is fixed to each wire 12 near the other end so that the wire 12 can move in the housing 15 as the wire 12 slides. The wires 12 are arranged so as to extend outward from the bottom plate of the housing 15.

Next, the detecting section 22 is disposed in the housing 15 below the operating section 16, and is connected to the wire connecting plate 20 and extends downwardly as shown in FIG. Is arranged in the vicinity of. The detection unit 22 is composed of, for example, a pair of micro switches and the like, and is arranged in the housing 15 so as to be able to come into contact with the mover fixed to each wire 12 described above.

That is, each microswitch 22 can detect the movement of the mover caused by the sliding of the wire 12 by the lever handle 17 or the like, and the movement state of the wire 12 can be detected. In addition, this detection unit,
An indicator lamp (not shown) is connected, and when each micro switch 22 detects it, the indicator lamp is lit to indicate its state.

Next, the control section 14 comprises a linear actuator 23 and a control means such as a control circuit for controlling the linear actuator 23. As shown in FIG. 2, the direct-acting actuator 23 is disposed in the housing 15 above the operating portion 16, is close to the wire connecting plate 20, and has a tip end of an actuator 23a on the periphery thereof. The restriction pieces 24 are arranged so as to face each other.

Although not shown as a control means,
A power source connected to the linear actuator 23, for example, a battery or a commercial power source, and a switch or the like interposed therebetween are generally configured.

In this embodiment, the linear actuator 23 of the control unit 14 is such that, in a non-energized state, the regulating piece 24 at the tip of the operator is formed on the peripheral edge of the wire connecting plate 20. The wire connecting plate 20 and the lever handle 17 can be fitted in the recess 21, that is, the restricting piece 24 is fitted in the engaging recess 21.
Cannot rotate, and when the power is turned on, the restriction piece 2
4 is retracted, the fitting state with the engaging recess 21 is released, and the lever handle 17 becomes rotatable.

In the present embodiment, a transmission / reception unit (not shown) is connected to the control unit 14, and the opening / closing of the switch is controlled by the signal output from the transmission / reception unit. By using a wireless transceiver (not shown) that is separate from the control unit 14, it is possible to wirelessly operate the opening and closing of the switch.

Next, the operation of the lock device constructed as above will be described. Normally, the lid 4 of the structure 1 surrounding the oil product inlet 2 is in a closed state, and the closed state is locked by the locking mechanism 5.

That is, the direct-acting actuator 23 in the control unit 14 is in a non-energized state, and the regulating piece 24.
Is fitted into the engaging recess 21 of the wire connecting plate 20,
The lever handle 17 cannot rotate.

As a result, the claw 7 of the locking mechanism 5 projects into the opening 9 in the upper part of the case, so that the claw 7 is engaged with the engaging projection 6 of the lid 4 and the lid 4 is opened. Considered impossible.

Further, the locked state is detected by the detection section 22 arranged near the other end 12b of the wire, and the state is displayed by a display lamp or the like.

Next, when a petroleum product is introduced into the storage tank from the petroleum product carry-in port 2, that is, a tank truck arrives, and the operator of the tank truck carries a refueling hose to the carry-in port. When connecting, the control unit 14 first confirms the arrival by a wireless transceiver carried by the driver.
Wirelessly transmitted to.

Upon receiving the signal, the transmission / reception section of the control section 14 closes the switch of the control means to bring it into the energized state, and actuates the linear actuator 23. Then, the restriction piece 24 of the linear motion actuator 23 retracts, the fitting state with the engaging recess 21 of the wire connecting plate 20 is released, and the lever handle 17 becomes rotatable.

Next, when the lever handle 17 is rotated, the wire 12 slides in accordance with the rotation, and the claw 7 of the lock mechanism section 5 rotates via the wire 12.

When the claw 7 rotates, the lid 4
The locked state with the engaging convex portion 6 is released, that is, the unlocked state is achieved, and the lid body 4 of the structure 1 can be opened, whereby the refueling hose is connected to the carry-in port 2 and refueling is performed.

At the same time, the unlocked state is set to the other end 12b of the wire.
A detection unit (micro switch) 22 arranged in the vicinity detects the state, and the state is displayed by a display lamp or the like.

When locking again, after closing the lid 4, the lever handle 17 of the operating portion 16 is rotated to rotate the claw 7 via the wire 12 to engage the engaging convex portion 6. The lever handle 17 is made non-rotatable by engaging and locking the lever 14 and releasing the power supply to the controller 14. This will lock it.

Therefore, in the lock device constructed as described above,
The locking / unlocking mechanism 5 is configured to have no electrical structure, and the locking / unlocking control of the locking mechanism 5 is arranged at a position (O) separated from the locking mechanism 5 to be electrically operated. Since it is configured to do so, there will be no electric components in the facility I called a gas station, which is a hazardous material handling station that is strictly prohibited from fire and is defined as an explosion-proof area, and there is no fear of ignition. Thereby, the lid 4 of the construct 1
It is possible to automate the locking and unlocking of the.

Further, from the above, it is unnecessary to manage keys such as a padlock as in the prior art, the complexity is eliminated, and the manpower can be saved and the workability is improved.

Particularly, in the above-described embodiment, the control unit 1
Since the transmitting / receiving unit is connected to 4 and the control unit 14 can be controlled by the wireless transmitting / receiving unit, the locking / unlocking of the lock mechanism unit 5 can be remotely operated, and labor saving can be achieved. .

In the above-described embodiment, an example in which the structure of the lock mechanism unit 5 is composed of the rotating claw 7 has been described, but the structure of the lock mechanism unit 5 is not limited to this. For example, it may be configured to have a barbed structure. In this case, since the barbed structure is a linear motion mechanism, for example, a compression coil spring is provided at the base end of the barbed portion,
The tip side is always projected, and the operation section of the control section pulls the projection through a wire or the like to retract the projection to unlock. According to this structure, one wire as a connecting portion that connects the lock mechanism unit 5 and the control unit 14 can be configured, and the structure can be simplified.

Further, as shown in FIG. 3, an air cylinder 30 is arranged in the lock mechanism section 5, an air compressor 31 and a solenoid valve 32 are provided in the control section 14, and the lock mechanism section 5 and the control section 14 are connected to each other. May be connected by an air pipe 33. In this case, the claw 7 is connected to the tip of the piston rod 34 of the air cylinder 30 so that the claw 7 oscillates in conjunction with the sliding of the piston rod 34. A compression spring 35 or the like is provided so that the piston rod 34 projects, and the piston rod 34 is retracted by air to unlock the piston rod 34. According to this, it is not necessary to provide a mechanical structure as the connecting portion.

Furthermore, the above-mentioned lock mechanism section 5 has the structure 1
Although the structure is provided on the outer side of the structure 1, the structure may be arranged on the inner side of the structure 1 or the like, or the structure may be such that a plurality of locking mechanism parts 5 are arranged. According to such a configuration, damage is avoided and the reliability of the locked state of the lock mechanism unit 5 is improved.

In the above-described embodiment, the control unit 1
The example in which the lock mechanism unit 5 is unlocked by manually rotating the operation unit 16 constituting the 4 has been described, but the lock mechanism unit 5 is connected to and unlocked. A configuration for performing the locking operation via the connecting portion 12 such as a wire,
The structure may be configured by a rotary actuator such as a motor, or may be configured by a linear actuator. In this case, the operation unit is not provided, and the control unit 14 can directly electrically perform the locking / unlocking operation of the lock mechanism unit 5, and the operation can be facilitated.
In addition, it is possible to further improve the operability of the wireless transceiver described in the above embodiment.

Further, in the case where a plurality of constructs 1 are installed, each construct 1 has a lock mechanism section 5 and the lock device of the present invention is provided to manage each, the bar is provided in each construct 1. If the code is displayed and the wireless transmitter / receiver is provided with a function such as a barcode reader, the barcode of the structure 1 is read by the wireless transmitter / receiver and the information is wirelessly transmitted. A configuration such as unlocking the unit 5 can be realized.

Further, in the above-mentioned embodiment, the control unit 1
The configuration in which the transmitting / receiving unit is connected to the control means constituting the unit 4 to operate the wireless transmitting / receiving unit has been described.
4 is connected to a magnetic card reader or a numeric keypad, and the control unit is operated by the magnetic card, or the personal identification number is input by the numeric keypad, the control unit 14 is controlled, and the locking / unlocking operation of the lock mechanism unit 5 is performed. Alternatively, a bar code reader or the like may be connected to the control unit 14 to control the control unit 14 by inputting a control signal by light to perform the locking / unlocking operation of the lock mechanism unit 5. Good.

Furthermore, in the above-described embodiment, an example in which the detection unit is constituted by the micro switch 22 has been described, but the present invention is not limited to this, and for example, the rotation state of the operation unit 16 such as the lever handle 17 or the like. An optical sensor or the like may be provided so as to directly detect.

Further, in the above-described embodiment, the gas station is taken as an example of the dangerous place where the fire is strictly prohibited, and the structure 1 surrounding the carry-in port 2 of the petroleum product is described as a target to be locked and unlocked. The present invention is not limited to this, and may be configured as, for example, a lock for managing or handling a chemical substance that is strictly prohibited from burning in a chemical plant, or a lock used for storing a dangerous substance having a risk of explosion.

[0051]

As described above, in the lock device in the fire prohibition area according to the present invention, the locking mechanism for locking and unlocking is configured as a mechanical system structure having no electrical structure. Since the control of locking / unlocking is arranged electrically at a position separated from the lock mechanism, it has a remote operation structure in which no electrical components are arranged in the area where fire is strictly prohibited. For example, there is an effect that it is possible to automate locking / unlocking of the opening / closing body without fear of igniting a structure storing a dangerous substance.

Further, from the above, it is unnecessary to manage keys such as a conventional padlock and the like, and the complexity is eliminated, and only the locked / unlocked state is managed, so that the labor can be saved. In addition, the workability is improved.

Furthermore, if the detector is provided, the locked / unlocked state of the lock mechanism can be confirmed, and the confirmation can be performed by the control unit separate from the construction. This has the effect of improving operability and workability.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a lock device in a fire strictly prohibited area according to the present invention.

FIG. 2 is a schematic configuration perspective view of the lock device.

FIG. 3 is a schematic front view of a lock device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Construct 2 ... Carry-in port 4 ... Opening / closing body (lid) 5 ... Lock mechanism part 12 ... Connection part (wire) 14 ... Control part 16 ... Operation part 22 ... Detection part (micro switch) I ... Danger area O ... Outside hazardous area

Claims (4)

[Claims] 1. A lock mechanism unit having a mechanical system structure for locking and unlocking a structure opening / closing body installed in a dangerous place where fire is strictly prohibited; and a lock mechanism unit disposed outside the dangerous place and connected to the lock mechanism unit. And a control unit for electrically controlling the locking / unlocking operation of the locking mechanism unit. 2. A lock mechanism unit having a mechanical system structure for locking and unlocking a structure opening / closing body installed in a dangerous place where fire is strictly prohibited; and a lock mechanism unit disposed outside the dangerous place and connected to the lock mechanism unit. A lock device in a fire strictly prohibited area, comprising: a control part for controlling locking / unlocking operation of the locking mechanism part by driving the connection part by an electric signal. 3. A lock mechanism unit having a mechanical system structure for locking and unlocking a structure opening / closing body installed in a dangerous place where fire is strictly prohibited; and a lock mechanism unit disposed outside the dangerous place and connected to the lock mechanism unit. A lock device in a fire strictly prohibited area, comprising: an operation unit for operating a locking / unlocking operation of the lock mechanism unit; and a control unit for electrically controlling an operation of the operation unit. 4. The lock device in the fire strictly prohibited area according to claim 1, 2 or 3, wherein the control unit includes a detection unit that detects a locked / unlocked state of the lock mechanism unit.