JP4077265B2 - Wall-mounted gas alarm device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wall surface fixed gas alarm device.
[0002]
[Prior art]
For example, in a semiconductor device or liquid crystal device manufacturing factory, or various chemical factories, etc., when a specific hazardous gas is contained in a high concentration in the environmental atmosphere, for example, when it becomes dangerous to workers, A gas alarm device is used to warn that. And as a gas alarm device, a wall surface fixed type gas alarm device is widely used, and various types of dangerous gases are detected by arranging a large number of them in a state of being arranged side by side on the wall surface. To be done.
[0003]
The wall surface fixed type gas alarm device includes a communication circuit board having a communication device as a communication means in the inside thereof, and thereby, for example, between the central management means via a gas management network. Communication is possible. And in the wall surface fixed type | mold gas alarm apparatus provided with the communication means, the light emission indicator which concerns on a communication device is provided, and, thereby, displaying the connection state etc. of the communication link in the said communication device is requested | required.
[0004]
However, it is necessary to provide a display means for displaying the gas detection result on the front surface of the wall-fixed gas alarm device. In order to secure a region where the luminescent indicator is disposed, the front surface has a large area. As a result, there is a problem that the installation area of the wall surface fixed gas alarm device on the wall surface becomes large. In addition, when the light emitting indicator is disposed on the front surface of the wall surface fixed type gas alarm device, there is a problem that there is a high possibility of causing misrecognition as a display by the gas detection result display means.
[0005]
On the other hand, since the communication cable for connecting to the central management means is often arranged on the wall surface, the communication circuit board is usually arranged at the rear portion of the wall surface fixed type gas alarm device. As a result, in the configuration in which the luminescent indicator is disposed on the front surface of the wall surface-fixed gas alarm device, for example, it is necessary to dispose a connection wire or the like. There's a problem.
[0006]
[Problems to be solved by the invention]
The present invention has been made based on the circumstances as described above, and its purpose is to make the whole small in size and to have a small installation area, and to turn on / flash the lighting indicator of the communication device from the front. An object of the present invention is to provide a wall surface fixed gas alarm device that can be easily visually recognized.
[0007]
[Means for Solving the Problems]
The wall surface-fixed type gas alarm device of the present invention is horizontally extended so as to extend in the front-rear direction on a rectangular parallelepiped outer casing fixed so that the rear and rear surfaces face the wall surface, and on the gas detection unit stored in the outer casing. A main circuit board disposed; a communication circuit board constituting a communication device that communicates with the central management means; and at least one light-emitting indicator that indicates a connection state of a communication link in the communication device. In the fixed wall type gas alarm device,
The communication circuit board is disposed above the rear region of the main circuit board in a state of being stacked with the main circuit board.
A display window for displaying the gas detection results is provided on the front of the outer casing.
The light emission indicator is positioned so that at least a part of the light emission part is above the top plate of the outer casing,
The top plate of the outer casing is formed with a top plate deforming portion having an opening on the front, which is formed to protrude upward from the top plate so as to cover the side and upper side of the light emitting unit. .
[0008]
In the above, it is preferable that the top plate deformation portion is formed by cutting and raising the top plate material. Further, the communication circuit board includes a light emitting indicator that indicates an operation state of the communication device, and at least a part of the light emitting portion exceeds the top plate of the outer casing, and the side and the upper side of the light emitting unit are the top plate. It is preferable to be disposed so as to be covered with the deformed portion .
[0009]
[Action]
According to the wall surface fixed gas alarm device having the above-described configuration, the light emitting indicator is positioned so that at least a part of the light emitting portion is located above the top plate constituting the outer casing, and the light emitting portion is disposed on the side. Since the front is facing the front of the wall-mounted gas alarm device in the state where the upper part is covered, the overall size is small and the installation area is small. It is easy to visually recognize.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is an explanatory perspective view showing the overall appearance of an example of a wall surface-fixed gas alarm device according to the present invention. FIG. 2 is a partial view of a gas detection unit in an example of a wall surface-fixed gas alarm device according to the present invention. FIG. 3 is a side view for explanation showing the configuration of the gas detection unit with a part thereof omitted, and FIG. 4 is a description showing a part of FIG. 3 in detail. FIG. 5 is an enlarged sectional view for explanation taken along the line AA in FIG. 4, FIG. 6 is an explanatory perspective view showing a part of the top plate deforming portion in an enlarged manner, and FIG. It is an expanded sectional view for description which expands and shows some cross sections along the front-back direction of the opening in a part.
[0011]
As shown in FIGS. 1 to 3, this wall-fixed gas alarm device (hereinafter also simply referred to as “gas alarm device”) 10 is provided on a wall surface that defines a target space for gas detection in factories and other buildings. The fixed side unit 20 to be fixed, the gas detection unit 30 that is detachably mounted by sliding to the fixed side unit 20 by, for example, an appropriate engagement mechanism, and fixed as described later. The gas detection unit 30 attached to the side unit 20 is provided with a cover 10A engaged and attached to the fixed side unit 20 so that the gas detection unit 30 is housed therein, and an outer casing is constituted by the fixed side unit 20 and the cover 10A. Yes.
[0012]
The fixed-side unit 20 is composed of an L-shaped chassis 21 as a whole by a bottom plate 23 extending in the horizontal direction and a vertical portion 22 extending continuously in a vertical direction at one end of the bottom plate 23. .
[0013]
A plurality of (four in the example shown in FIG. 3) through-holes are formed in the bottom plate 23 of the chassis 21, and each of them has two fluid connectors 24 and two in the example shown in FIG. The cable lead-in protectors 25 are arranged so as to protrude downward.
Here, the fluid connector 24 is connected to a pump unit, which will be described later, to form a flow path for introducing and discharging detected air, and the cable lead-in protector 25 is drawn into the gas detection unit 30, for example, power supply It protects various cables such as industrial cables.
[0014]
In the figure, 131 is a display window for displaying the display contents on the display unit 341, 132 is an operation state monitoring window for visually confirming the operation state in the flow meter unit 42, and 26 is formed on the cover 10A. An engaging claw that fits into the slit 141 and engages the fixed side unit 20 and the cover 10A.
[0015]
As shown in FIG. 3, the gas detection unit 30 includes a control unit 31 disposed in the upper part thereof and a gas detection operation unit 40 disposed in an arrangement space below the control unit 31. ing.
[0016]
The control unit 31 includes a main circuit board 32 and a communication circuit board 33 that extend in the front-rear direction of the gas alarm device 10 and are connected to the fixed unit 20 via the connector 221 and disposed horizontally. It is said that.
[0017]
Specifically, above the rear region of the main circuit board 32, the communication circuit board 33 is stacked by the vertical part 22 of the chassis 21 in a state of being stacked with a gap portion between the main circuit board 32 and the main circuit board 32. The communication circuit board 33 constitutes a communication device that communicates with central management means for managing, for example, a plurality of gas alarm devices.
[0018]
The communication circuit board 33 is provided with various communication mounting elements (not shown), and LED indicators 35 (two in the illustrated example) as light emitting indicators are vertically suspended at the front edge thereof. Has been. In addition, a connection pin group 331, a part of which acts as a support stud, is disposed on the side edge so as to extend downward, whereby electrical connection and electronic connection with the main circuit board 32 are achieved. Has been.
[0019]
The LED indicator 35 has a cylindrical light-emitting portion 351 supported by a stud 352 at the base end and having a hemispherical tip, and a part of the light-emitting portion 351 crosses the top plate 11 upward. It is arranged to be located.
That is, in FIG. 3, the chain line B indicates the height position of the top plate 11 on the outer casing, and is supported by the stud 352 having an appropriate height so that the upper end of the light emitting unit 351 has the chain line B upward. An LED indicator 35 is disposed so as to be located beyond the above.
[0020]
As the LED indicator 35, two modules, a module status LED and a network status LED, are provided, each of which corresponds to an operating state in a communication device or a connection state of a communication link in the communication device, for example, as described later. In addition, they are lit or blinking red.
[0021]
At the front edge of the main circuit board 32, a detection result display panel 34 provided with a display unit 341 (4-digit number display) is provided so as to hang upward along the edge. Further, below the front region, a ceiling plate 37 that divides an arrangement space of the gas detection operation unit 40 is supported through a support stud 321 in a suspended manner. An operation unit 38 including appropriate operation buttons is provided between the main circuit board 32 and the ceiling board 37.
[0022]
As shown in FIGS. 4 and 5, the upper and lower surfaces of the main circuit board 32 are provided with printed wiring and various mounting elements 36 that constitute a circuit required for detection of a detection target gas and generation of a gas detection alarm. For example, a large volume element such as a coil 361 that constitutes a noise filter and an electrolytic capacitor 362 that constitutes a power supply voltage stabilizing circuit and a pump driving voltage stabilizing circuit is suspended in the rear region on the lower surface of the main circuit board 32. The sensitivity adjustment circuit part which concerns on detection of detection object gas is provided in the front part field of the upper surface. Here, the upper space of the front region is configured to be accessible so that various maintenance operations in the region can be easily performed.
[0023]
The gas detection operation unit 40 includes a pump unit 41 (see FIG. 2) including a pump mechanism for introducing and discharging the detected air to supply the detected air to the gas sensor via the fluid connector 24, and the pump. A flow meter unit 42 that measures the flow rate of the air to be detected introduced by the unit 41 and a gas sensor unit 43 that includes a gas sensor that measures the concentration of the gas to be detected contained in the supplied air to be detected. ing.
[0024]
The gas sensor unit 43 only needs to be provided with an appropriate gas sensor according to the type of target gas to be detected. Examples of such a gas sensor include phosphine, silane, diborane, hydrogen chloride, hydrogen selenide, Hydrogen fluoride, bromine, carbon tetrachloride, ammonia, fluorine, chlorine, ozone, sulfur dioxide, oxygen, hydrogen sulfide, carbon monoxide, acetylene, acetone, isobutane, ethanol, ethylene, vinyl chloride, xylene, hydrogen, toluene, butane , Propane, methane, methanol, gasoline, or the like may be detected as a detection target gas and the concentration thereof may be measured.
[0025]
In the wall-mounted gas alarm device 10 having the above-described configuration, the cover 10A has a front-rear direction consisting of four surfaces, a top plate 11, a front surface portion 13, and two side surface portions 14, as shown in FIG. It has a vertical rectangular parallelepiped shape extending in the direction. A slit 141 extending in the front-rear direction from the rear end edge portion is formed in the side surface portion 14, and the cover 10 </ b> A has an engagement claw 26 provided in the fixed side unit 20 inserted into the slit 141. The gas detection unit 30 is engaged with the fixed side unit 20 so as to be stored, and is further fixed to the fixed side unit 20 by being fixed by the screw 15, whereby the outer casing in which the gas detection unit 30 is accommodated. Configure.
[0026]
On the surface of the top plate material forming the top plate 11 of the cover 10A, for example, a position corresponding to the front end edge of the communication circuit board 33 is a boundary C, the front region Fw is ahead of the boundary C, and the rear region is a rear region. Bw (see FIG. 4).
As shown in FIGS. 1, 4 to 7, the gas alarm is provided from the position of the boundary C to the last edge of the cover 10 </ b> A at a position displaced so as to be close to the one side surface portion 14 in the rear region Bw. A top plate deformation portion 12 having a rectangular projecting surface 121 extending long in the front-rear direction of the apparatus 10 is provided.
[0027]
The top plate deforming portion 12 is a top plate for forming the top plate 11 such that the projecting surface 121 protrudes above the top plate 11 and forms a gap G (see FIG. 6) with the top plate 11. A part of the plate material is deformed by cutting and raising, so that it is formed so as to cover both sides and the upper side of the tip portion of the light emitting part 351 located above the level at which the top plate 11 extends as described above. Yes.
[0028]
An opening 122 is formed in the gap Gf formed in front of the gas alarm device 10 in the gap G formed by the projecting surface 121 and the top plate 11 (see FIGS. 6 and 7). The aspect which the part 351 faces the front direction of the gas alarm apparatus 10 through the said opening 122 is achieved.
In addition, an opening 123 facing the rear of the gas alarm device 10 is formed in the gap located at the rear end of the top plate deforming portion 12 while facing the opening 122 in parallel.
Here, in FIGS. 4 and 7, reference numeral 124 denotes a back plate for improving the visibility of the light emitting unit 351.
[0029]
As such a top plate deformable portion 12, the size and shape of the top plate deforming portion 12 are not particularly limited as long as it forms the opening 122 that allows the LED indicator 35 to be easily visually recognized from the front. For example, the width of the projecting surface 121 is 10.0 to 20.0 mm, and the height of the stepped portion is 1.5 to 4.0 mm.
Here, the top plate deformation | transformation part 12 can be formed also by appropriate methods other than a cutting and raising process, and the shape of the opening 122 is not restrict | limited in particular.
[0030]
In the above-described wall-mounted gas alarm device 10 of the present invention, for example, the dimensions of the outer casing are 153.5 mm, the depth is 152.0 mm, and the width is 70.0 mm. The depth length of 12 is 57.0 mm, the width is 18.0 mm, and the protruding height is 2.7 mm.
[0031]
According to the gas alarm device 10 configured as described above, the communication cable drawn into the cover 10A via the cable lead-in protector 25 is connected to the communication circuit board 33, and the communication device becomes the central management means. The air to be detected is introduced by the action of the pump in the pump unit 41, and this air to be detected is supplied to the gas sensor unit 43. Further, in the flow meter unit 42, the flow rate of the detected air introduced by the pump unit 41 is continuously measured, and the flow rate of the detected air is controlled by the pump unit 41 according to the measurement result. .
[0032]
In the gas sensor unit 43, detection of a specific detection target gas and measurement of the concentration of the detection target gas are performed for the air to be detected, and the concentration of the detection target gas obtained thereby is displayed on the display unit 341.
When the concentration of the detection target gas measured by the gas sensor unit 43 exceeds a preset reference value, an alarm signal is generated and the alarm signal and various information corresponding to the alarm signal are generated by the communication device. Is transmitted to the central management means.
[0033]
In the above, according to the connection state of the communication link concerning the communication device, the operation state of the communication device, and the like, the LED indicator 35 is turned on or blinked in a manner described later.
That is, the network status LED indicates the connection state of the communication link related to the communication device. For example, when the communication device is offline (OFF-LINE), the network status LED is turned off, and the communication device is online (ON- LINE) state, and when the link with the central management means is normal, it lights in green, an error occurs in the communication device, and an error that prevents communication with the central management means occurs. Lights red when detected by the device.
[0034]
The module status LED indicates the operation state of the communication device. For example, when the communication device is in an off state, the module status LED is turned off. When the communication device is operating normally, the module status LED is lit in green. However, when an unrecoverable abnormality has occurred in the communication device, it lights in red.
[0035]
Thus, according to the above wall surface fixed type gas alarm device, the light emission indicator according to the communication device is positioned so that at least a part of the light emitting portion thereof is located above the top plate constituting the outer casing, and the light emission is performed. Since the part faces the front of the wall-mounted gas alarm device, that is, in the front direction, with its side and upper part covered by the top plate deformation part, the light emission indicator has high visibility from the front. In addition, the whole wall-mounted gas alarm device is small, and its outer casing has no protrusion in the side direction and is almost flat, so that it has a small installation area when many are installed side by side. It is.
[0036]
Furthermore, even when a large number of them are arranged in the horizontal direction, it is easy to visually confirm the luminescent indicators according to the individual wall-fixed gas alarm devices from the front direction. The operation state in the communication device or the connection state of the communication link in the communication device can be easily and accurately grasped.
[0037]
Moreover, since the two openings formed in the top plate of the cover by the top plate deforming portion act as air circulation ports, the air circulation property in the upper space of the wall surface fixed type gas alarm device is improved. Heat dissipation in the mounting element such as an electrolytic capacitor is surely performed. Therefore, deterioration due to heat in the mounting element is suppressed, and a long life is achieved.
[0038]
Although the configuration of the wall surface fixed type gas alarm device of the present invention has been specifically described above, the present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, the wall surface fixed type gas alarm device may be configured to include a plurality of gas sensors that detect different types of gases.
[0039]
【The invention's effect】
According to the wall surface-fixed gas alarm device of the present invention, the light emission indicator is positioned so that at least a part of the light emission part is located above the top plate constituting the outer casing, and the light emission part is disposed on the side and Because it faces the front of the wall-mounted gas alarm device, ie, in front of the wall-mounted gas alarm device, the overall size is small, the installation area is small, and the lighting state is visible from the front of the wall-mounted gas alarm device. Easy to do.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view showing the appearance of an example of a wall surface fixed type gas alarm device of the present invention.
FIG. 2 is an explanatory perspective view showing a gas detection unit in an example of a wall surface fixed type gas alarm device of the present invention with a part thereof omitted.
FIG. 3 is a side view for explaining a gas detection unit with a part thereof omitted.
FIG. 4 is an explanatory side view showing a part thereof in detail in FIG. 3;
5 is an explanatory enlarged sectional view taken along line AA in FIG. 4. FIG.
FIG. 6 is an explanatory perspective view showing a part of the top plate deforming portion in an enlarged manner.
FIG. 7 is an explanatory enlarged cross-sectional view showing an enlarged part of a cross section along the front-rear direction of the opening in the top plate deforming portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Wall surface fixed type gas alarm apparatus 10A Cover 11 Top plate 12 Top plate deformation | transformation part 121 Projection surface 122 Opening 123 Opening 124 Back plate 13 Front surface part 131 Display window 132 Operation state monitoring window 14 Side surface part 141 Slit 15 Screw 20 Fixed side unit 21 Chassis 22 Vertical portion 221 Connector 23 Bottom plate 24 Fluid connector 25 Cable lead-in protector 26 Engagement claw 30 Gas detection unit 31 Control unit 32 Main circuit board 321 Support stud 33 Communication circuit board 331 Connection pin group 34 Detection result display panel 341 Display unit 35 LED indicator 351 Light emitting unit 352 Stud 36 Mounting element 361 Coil 362 Electrolytic capacitor 37 Ceiling panel 38 Operation unit 40 Gas detection operation unit 41 Pump unit 42 Flow meter unit 43 Gas sensor unit C Boundary G Gap Gf Gap w front region Bw after area

Claims (3)

A rectangular parallelepiped outer casing that is fixed so that the rear and rear surfaces face the wall surface, a main circuit board that is horizontally disposed to extend in the front-rear direction at the upper part of the gas detection unit stored in the outer casing, and a central management In a wall-fixed gas alarm device comprising a communication circuit board that constitutes a communication device that communicates with a means, and at least one light emitting indicator that indicates a connection state of a communication link in the communication device,
The communication circuit board is disposed above the rear area of the main circuit board in a state of being stacked with the main circuit board.
A display window for displaying the gas detection results is provided on the front of the outer casing.
The light emission indicator is positioned so that at least a part of the light emission part is above the top plate of the outer casing,
The top plate of the outer casing is formed with a top plate deforming portion having an opening on the front and formed so as to protrude upward from the top plate so as to cover the side and upper side of the light emitting unit. Wall-mounted gas alarm device.   2. The wall surface fixed gas alarm device according to claim 1, wherein the top plate deforming portion is formed by cutting and raising the top plate material.   The communication circuit board includes a light emitting indicator that indicates an operation state of the communication device, and at least a part of the light emitting portion extends above the top plate of the outer casing, and the side and the upper side of the light emitting portion are the top plate deformed portions. The wall-fixed gas alarm device according to claim 1 or 2, wherein the gas alarm device is fixed so as to be covered with the wall.

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