JP6767817B2 - Gas detector - Google Patents

Description

The present invention comprises a main body casing having an explosion-proof structure, which has a battery accommodating space for accommodating a working battery in a state of being partitioned from other spaces.
The present invention relates to a gas detection device including a gas detection unit that detects a predetermined detection target gas.

As a conventional gas detection device, a device having an explosion-proof main body casing that can be used in an environment containing flammable gas and having an external power supply operation type in which power for operation is supplied through a power cable is known. (See, for example, Patent Document 1).
However, in recent years, such an external power supply type gas detection device cannot be installed in a place where it is difficult to secure an external power supply, or it requires complicated laying work of a power supply cable. , A battery-operated type that can use an operating battery as a power source may be required.

When a gas detection device provided with a main body casing having such an explosion-proof structure is battery-operated, the detection result or the like is displayed on a display unit provided on the front side in the space on the front side inside the main body casing. Since the control circuit and the like for the operation are arranged, the battery accommodating space for accommodating the operating battery is arranged in the space on the rear side separated from the space on the front side thereof, and is arranged in the battery accommodating space. On the other hand, an opening for attaching / detaching the operating battery is generally provided on the back side of the main body casing.

JP-A-2007-127594

In the gas detection device provided with an opening for attaching / detaching the operating battery on the back side of the main body casing as described above, the operating battery is replaced while it is installed at a predetermined installation location such as in a factory. It is necessary to go around to the back side of the main body casing to carry out. However, such a gas detection device is often installed in a place where sufficient space cannot be secured on the back side, and the operation battery cannot be easily replaced, resulting in poor workability. There is a problem.

In view of this situation, a main object of the present invention is to provide a technique for improving the workability of the replacement work of the operating battery in the battery-operated gas detection device having an explosion-proof structure.

The first characteristic configuration of the present invention is a main body casing having an explosion-proof structure having a battery accommodating space for accommodating a working battery in a state of being partitioned from other spaces.
A gas detection device equipped with a gas detection unit that detects a predetermined detection target gas.
The main body casing has an access opening on the front side and has a lid that can open and close the access opening.
The battery accommodating space is configured such that the operating battery can be attached and detached through the access opening .
The point is that a battery accommodating case having the battery accommodating space is detachably provided in the main body casing through the access opening .

According to this configuration, since the main body casing has an access opening that can be opened and closed by the lid, the internal space of the main body casing is accessed through the access opening from which the lid is removed, and the operating battery is used. Predetermined work such as replacement work can be carried out.
Then, the access opening is arranged on the front side of the main body casing, and the battery storage space partitioned from other spaces in order to realize the explosion-proof structure in the internal space of the main body casing is the access opening on the front side. The operating battery is detachably configured through the unit. As a result, the operation battery can be efficiently replaced through the access opening in a stable posture on the front side of the main body casing without wrapping around to the back side of the main body casing.
Therefore, according to the present invention, it is possible to provide a technique for improving the workability of the replacement work of the operating battery in a battery-operated gas detection device having an explosion-proof structure.
Further, according to this configuration, not only the operating battery but also the battery accommodating case having the battery accommodating space can be attached and detached through the access opening provided on the front side of the main body casing. As a result, it is possible to efficiently carry out work involving attaching and detaching the battery accommodating case through the access opening in a stable posture on the front side of the main body casing, and workability can be further improved.

The second characteristic configuration of the present invention includes a main body casing having an explosion-proof structure, which has a battery storage space for accommodating a working battery in a state of being partitioned from other spaces.
A gas detection device equipped with a gas detection unit that detects a predetermined detection target gas.
The main body casing has an access opening on the front side and has a lid that can open and close the access opening.
The battery accommodating space is configured such that the operating battery can be attached and detached through the access opening.
A battery storage case having the battery storage space is detachably provided in the main body casing.
The point is that the battery accommodating case has a battery insertion port into which the operating battery can be inserted into the battery accommodating space through the access opening of the main body casing in a state of being mounted in the main body casing.

According to this configuration, since the main body casing has an access opening that can be opened and closed by the lid, the internal space of the main body casing is accessed through the access opening from which the lid is removed, and the operating battery is used. Predetermined work such as replacement work can be carried out.
Then, the access opening is arranged on the front side of the main body casing, and the battery storage space partitioned from other spaces in order to realize the explosion-proof structure in the internal space of the main body casing is the access opening on the front side. The operating battery is detachably configured through the unit. As a result, the operation battery can be efficiently replaced through the access opening in a stable posture on the front side of the main body casing without wrapping around to the back side of the main body casing.
Therefore, according to the present invention, it is possible to provide a technique for improving the workability of the replacement work of the operating battery in a battery-operated gas detection device having an explosion-proof structure.
Further, according to this configuration, the battery accommodating case is configured to have a battery insertion port on the access opening side when mounted in the main body casing. As a result, even when the battery accommodating case is mounted in the main body casing, the operation battery can be replaced on the front side of the main body casing through the access opening and the battery insertion port.

The third characteristic configuration of the present invention is that when the lid is attached with the access opening closed by the lid, the back cover portion of the lid abuts on the edge of the battery insertion port of the battery housing case. At the point.

According to this configuration, when the lid is attached, the back cover of the lid comes into contact with the edge of the battery housing case on the access opening side. As a result, the battery accommodating space provided in the battery accommodating case and other spaces can be reliably partitioned, and the explosion resistance in the main body casing can be improved.

Perspective view of gas detector Front view with the lid of the gas detector removed Side sectional view of the gas detector An exploded perspective view of the sensor unit and communication connector with respect to the main body casing An exploded perspective view of the front side of the battery housing case Perspective view of the back side of the battery housing case Rear view of battery housing case An exploded perspective view of the battery housing case with respect to the main body casing An exploded perspective view of the battery housing case with respect to the main body casing An exploded perspective view of the operating battery with respect to the main body casing An exploded perspective view of the lid with respect to the main body casing Conceptual side sectional view showing the state of space division in the main body casing

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the gas detection device 100 of the present embodiment is a gas detection unit that detects a predetermined detection target gas such as a flammable gas or a toxic gas, and detects various types of gas such as a constant potential electrolytic sensor. A known sensor unit U1 equipped with a sensor is provided, and the detection result of the sensor unit U1 is centrally monitored separately through a communication connector U2 and a communication device (not shown) connected to the communication connector U2. It is configured to output to the system (not shown). Such a gas detection device 100 is installed in as many detection target areas as possible in the plant facility, for example, in order to quickly detect a gas leak generated in the plant facility.

Some of this type of gas detection device is configured to be operated by an external power source that is operated by electric power supplied from the outside, but the gas detection device 100 of the present embodiment has a built-in operating battery B (FIG. 2). It is configured as a battery-powered electrical device that is powered by power supplied from (see). The detailed configuration of the battery-operated gas detection device 100 will be described below.

As shown in FIGS. 1 to 3, the gas detection device 100 has a state in which the battery accommodation space 31a accommodating the operating battery B (see FIG. 8) is partitioned from the other spaces A1 and A2 (see FIGS. 3 and 12). The main body casing 10 having the explosion-proof structure, the battery storage case 30 which has the battery storage space 31a and is detachably provided in the main body casing 10, and the lid 20 which can open and close the access opening 10a of the main body casing 10 and the like. It is composed of. Hereinafter, the details of each component will be described in order. In the gas detection device 100 of the present application, the side on which the display unit 28 is arranged (lower right side in FIG. 1) is called the front side, and the side attached to the mounting plate P (upper left side in FIG. 1) is the back side. Called.

(Main body casing)
As shown in FIGS. 1 to 4, the main body casing 10 has a bottomed cylindrical shape composed of a cylindrical body portion 13 extending in the horizontal direction and a bottom portion 14 that closes the back surface side of the cylindrical body portion 13. Has a shape. Further, the front edge portion of the cylindrical body portion 13 is formed as a ring-shaped lid mounting portion 12 having a threaded portion formed on the outer peripheral surface of the outer lid 21 of the lid body 20 described later. A circular opening surrounded by the lid mounting portion 12 is formed as an access opening 10a that can be opened and closed by the lid body 20 described later. A battery accommodating case 30, which will be described later, is detachably provided in the main body casing 10, and the internal space of the main body casing 10 is divided into the battery accommodating space 31a and other spaces A1 and A2 (FIG. 3 and FIG. 12).

A sensor unit U1 and a communication connector U2 are mounted on the upper and lower parts of the main body casing 10, respectively, and the cable U1c of the sensor unit U1 and the cable U2c of the communication connector U2 are pulled into the main body casing 10 and each cable is used. The U1c and U2c plugs U1p and U2p are connected to connectors 49 and 50 (see FIG. 7), which will be described later, arranged in the main body casing 10, respectively.

On the left and right side portions of the main body casing 10, external device connecting portions 15 to which external devices such as alarm lamps (not shown) can be connected are provided at two upper and lower positions, respectively. The external device connecting portion 15 is formed as a tubular portion extending laterally, and is closed by the lid member 16 when not in use, and the lid member 16 is removed when in use to connect the external device. The predetermined external device connector 17 of the above is attached. Further, the cable of the external device (not shown) connected to the external device connector 17 passes through the external device connecting portion 15 and is drawn into the external device space A1a (see FIGS. 3 and 12) in the main body casing 10. Then, it is connected to the external device connector 42 (see FIG. 2) described later.

(Battery storage case)
As shown in FIGS. 2, 3 and 5 to 7, the battery accommodating case 30 has a square tubular body 31 having a battery accommodating space 31a in which a substantially rectangular parallelepiped operating battery B is accommodated. It is configured to have. The opening on one side (front side) of the square tubular body portion 31 is a battery insertion port 30a through which the operating battery B can pass. Further, as shown in FIGS. 8 and 9, the battery accommodating case 30 is in a posture in which the end on the side where the battery insertion port 30a is formed is arranged on the front side and the end on the other side is arranged on the back side. , The lid 20 is inserted into the main body casing 10 through the removed access opening 10a.
That is, as shown in FIG. 10, the battery accommodating case 30 is a battery in which the operating battery B can be inserted into the battery accommodating space 31a through the access opening 10a of the main body casing 10 while being mounted in the main body casing 10. It will have an insertion slot 30a.

The battery housing case 30 is made of a material having electrical insulation such as resin. Then, as shown in FIGS. 3 and 12, the battery accommodating case 30 housed in the main body casing 10 allows the internal space of the main body casing 10 to be in the access direction (for access) from the access opening 10a to the internal space. A battery storage space 31a formed inside the square tubular body 31 and another space formed outside the square tubular body 31 at right angles to the opening surface of the opening 10a). It will be partitioned into A1 and A2 while maintaining electrical insulation. That is, the square tubular body portion 31 which is the peripheral wall portion of the battery accommodating space 31a in the battery accommodating case 30 forms the battery accommodating space 31a on the outside of the other spaces A1 and A2 (see FIGS. 3 and 12). On the other hand, it functions as an insulating wall body that partitions while maintaining electrical insulation.

That is, the battery storage space 31a is partitioned with respect to the other spaces A1 and A2 in which various cables (wiring) and the like are housed while maintaining electrical insulation, thereby realizing an explosion-proof structure inside the main body casing 10. Has been done. Further, as shown in FIG. 4, an insulating bottom plate 37 made of a material having electrical insulation such as resin is mounted in the main body casing 10 before the battery housing case 30 is housed. That is, in the main body casing 10, the bottom portion 14 of the main body casing 10 and the rear end side end portion of the battery accommodating case 30 are partitioned by the insulating bottom plate 37 in a state where electrical insulation is maintained.

As shown in FIG. 10, with the battery accommodating case 30 mounted in the main body casing 10, the operation is performed through the access opening 10a provided on the front side of the main body casing 10 and the battery insertion port 30a of the battery accommodating case 30. The battery B can be attached to and detached from the battery accommodating space 31a. Further, as shown in FIGS. 8 and 9, the battery accommodating case 30 is also detachable through the access opening 10a provided on the front side of the main body casing 10. As a result, the operator who performs the work of attaching / detaching the battery storage case 30 to the inside of the main body casing 10, the work of replacing the operating battery B in the battery storage space 31a, and the work of wiring the other spaces A1 and A2, etc. On the front side of the main body casing 10 without wrapping around to the back side of the casing 10, access the inside of the main body casing 10 in the same direction through the access opening 10a from which the lid 20 is removed, and work efficiently in a stable posture. You will be able to implement it.

As shown in FIGS. 5 to 7, a board mounting portion 33 is erected upward on the upper surface of the square tubular body 31 of the battery housing case 30, and is located on the front side of the board mounting portion 33. The external device board 41 is fixed with screws.
Similarly, a board mounting portion 34 is erected downward on the lower surface of the square tubular body 31 of the battery housing case 30, and a relay connector board is placed on the front side of the board mounting portion 33. 45 is fixed with screws.
Then, as shown in FIG. 2, the shape of the outer peripheral edge portion of the substrate mounting portions 33 and 34 to which the respective substrates 41 and 45 are fixed is the shape along the inner wall surface of the cylindrical body portion 13 of the main body casing 10. As a result, these board mounting portions 33 and 34 are internally fitted into the cylindrical body portion 13 of the main body casing 10 in a state where the battery accommodating case 30 is mounted in the main body casing 10. Then, as shown in FIGS. 3 and 12, these board mounting portions 33, 34 are other spaces A1 of the internal space of the main body casing 10 partitioned by the battery accommodating case 30 with respect to the battery accommodating space 31a. An access space A1 facing the access opening 10a on the front side and directly accessible through the access opening 10a, and a wiring accommodation space on the back side where access through the access opening 10a is prohibited. It functions as a compartment to partition A2. Further, the front side of these substrates 41 and 45 is covered with electrically insulating insulating plates 44 and 51, whereby the partition of the internal space of the main body casing 10 described above is maintained in a state of maintaining electrical insulation. It can be carried out.

The space located on the front side of the board mounting portion 33 in the access space A1 communicates with the access opening 10a and the external device connecting portion 15, and the cable of the external device is drawn through the external device connecting portion 15. It is a space A1a for external devices. That is, the internal space of the main body casing 10 is composed of the battery accommodating space 31a and the wiring accommodating space A2 partitioned by the square tubular body portion 31 by the battery accommodating case 30 having the substrate mounting portion 33 functioning as the compartment. The space for permanent equipment and the space for external equipment A1a in which wiring to the external equipment in the access space A1 is accommodated will be partitioned. With this configuration, when accessing the external device space A1a through the access opening 10a and performing wiring work for connecting the external device, it is possible to prevent accidentally accessing the battery storage space 31a and the wiring storage space A2. , The adverse effect on the permanent equipment due to the incorrect access is avoided.

As shown in FIGS. 5 and 9, a cable of the external device drawn into the space A1a for the external device is connected to the front side of the board 41 for the external device fixed to the board mounting portion 33 to the external device. An external device connector 42 for outputting an operation signal is arranged.
On the other hand, on the back side of the board 41 for external devices, as shown in FIGS. 6 and 7, a plug on one side of the relay cable 55 for external devices laid in the wiring accommodation space A2 (see FIGS. 3 and 12). A relay connector 43 for an external device to which 55p is connected is arranged.

On the front side (access space A1 side) of the relay connector board 45 fixed to the board mounting portion 34, as shown in FIGS. 5 and 8, a control circuit 27 built in the lid 20 (see FIG. 11). A control circuit relay connector 46 (an example of a relay connector) connected to the control circuit and a power connector 47 to which a plug Bp (see FIG. 10) of the power cable Bc of the operating battery B is connected are arranged.
Then, when the lid body 20 closes the access opening 10a of the main body casing 10 with the lid body 20, the control circuit relay connector 46 automatically connects the lid body 20 and the control circuit relay connector 46. It is configured to do. With this configuration, it is prevented that the wiring for connection or the like interferes with the attachment / detachment of the operating battery B through the access opening 10a.

On the other hand, on the back side of the relay connector board 45, as shown in FIGS. 6 and 7, the plug on the other side of the relay cable 55 for external equipment laid in the wiring accommodation space A2 (see FIGS. 3 and 12). The relay connector 48 for an external device to which 55p is connected, the relay connector 49 for the sensor unit to which the plug U1p of the sensor unit U1 drawn into the wiring accommodation space A2 (see FIGS. 3 and 12) is connected, and the wiring accommodation space. A communication relay connector 50 to which the plug U2p (see FIG. 12) of the communication connector U2 drawn into A2 (see FIGS. 3 and 12) is connected is arranged.

By arranging various connectors on the external device board 41 and the relay connector board 45 as described above and connecting various cables to them, a control circuit is provided for the sensor unit U1, the communication connector U2, and the external device. It is possible to send and receive control signals by 27 and to supply power by the operating battery B.

As shown in FIG. 8, on the left side of the square tubular body 31 of the battery storage case 30, the side surface of the other space, which is the outer surface facing the wiring storage space A2 (see FIGS. 3 and 12), is used for external devices. A wiring guide 35 for holding the relay cable 55 in a predetermined holding posture is provided. On the other hand, as shown in FIG. 9, on the right side of the square tubular body 31 of the battery accommodating case 30, the communication connector U2 is on the side surface of the other space which is the outer surface facing the wiring accommodating space A2 (see FIG. 3). A wiring guide 36 for holding the cable U2c of the above in a predetermined holding posture is provided.

Further, another wiring guide 39 is formed so as to project rearward on the back surface side of the board mounting portion 33, and the wiring guide 39 has a portion on the communication connector U2 side of the wiring guide 36 in the cable U2c. Is held in a posture along the outer surface of the square tubular body portion 31. Further, the board mounting portion 33 is provided with a guide wall 38 for preventing the cable U2c drawn from the communication connector U2 into the wiring accommodation space A2 from bending to the side opposite to the wiring guides 36 and 39. The cable U2c is held by the wiring guides 36 and 39 and the guide wall 39 in an appropriate posture along the outer peripheral surface of the square tubular body 31 of the battery accommodating case 30.
The wiring guides 35, 36, and 39 form recesses with the outer peripheral surface of the square tubular body 31 of the battery housing case 30, and various cables 55 and U2c are fitted into the recesses so as to be sandwiched. It is configured.

That is, in the method of assembling the gas detection device 100 of the present embodiment, as shown in FIGS. 8 and 9, when the battery accommodating case 30 is mounted in the main body casing 10 through the access opening 10a, the battery housing case 30 is mounted in the main body casing 10. In the step of mounting the battery storage case 30, the wiring storage space A2 on the back side of the outer peripheral surface of the square tubular body 31 of the battery storage case 30 that functions as an insulating wall in advance before mounting the battery storage case 30. On the side surface of the other space facing (see FIGS. 3 and 12), the relay cable 55 for external equipment as wiring is held by the wiring guide 35, and the cable U2c of the communication connector U2 as wiring is connected to the wiring guides 36 and 39. To hold it. As a result, it is suppressed that these cables 55 and U2c are caught between the tip end portion (rear end side end portion) of the battery accommodating case 30 and the inner wall portion of the main body casing 10, and the battery accommodating space 31a due to the biting is suppressed. Poor insulation between the space A1 and A2 (see FIGS. 3 and 12) and the other spaces A1 and A2 are suppressed.

Further, at the four corners of the edge 30b on the access opening 10a side (front side) of the battery storage case 30 housed in the main body casing 10, a pedestal portion 32 for screwing and fixing the inner lid unit 24 described later is provided. Each is provided. Further, these pedestal portions 32 are composed of rod-shaped portions extending in the horizontal direction from the back side to the front side, and when the battery accommodating case 30 is mounted in the main body casing 10, the outer peripheral surface thereof is the main body casing. It is arranged close to the inner wall surface of the cylindrical body portion 13 of 10. The pedestals 32 arranged at the four corners of the battery accommodating case 30 provide a plurality of access spaces A1 formed on the front side of the board mounting portions 33 and 34 in the circumferential direction along the inner wall surface of the cylindrical body portion 13. For example, the space A1a for external equipment on the upper side is preferably partitioned with respect to the other access space A1 on the lower side.

(Lid)
As shown in FIGS. 1, 3 and 11, the lid 20 is a pedestal portion 32 of a battery accommodating case 30 housed in the main body casing 10 in a state of being internally fitted in the access opening 10a of the main body casing 10. It is composed of an inner lid unit 24 screwed to the inner lid unit 24 and an outer lid 21 fixed to the main body casing 10 so as to cover the access opening 10a.

The inner lid unit 24 has a structure in which the front side cover portion 25 and the back side cover portion 26 are entirely covered, and a control circuit 27 for performing operation control is built in the inner lid unit 24. As a result, the installation location of the control circuit 27 can be omitted in the main body casing 10, and a large space is secured.
Further, on the front side (outer surface side) of the front side cover portion 25 of the inner lid unit 24, a display unit 28 capable of displaying information such as detection results by the sensor unit U1 and various operating states, switching of operating states, and the like are performed. Operation switch 29 and the like for this purpose are arranged. With this configuration, it is not necessary to arrange these display portions 28 and the like on the front side of the main body casing 10, so that a wide access opening 10a is formed over substantially the entire front surface of the main body casing 10.

On the other hand, the back cover portion 26 of the inner lid unit 24 is connected to the control circuit relay connector 46 provided in the main body casing 10 in a state where the inner lid unit 24 is fitted in the access opening 10a. The lid side terminal (not shown) is arranged.

The outer lid 21 is a ring-shaped outer frame portion 22 that fits into a screw portion formed on the outer peripheral surface of the lid mounting portion 12 of the main body casing 10, and a transparent glass window that closes the inner opening of the outer frame portion 22. It is composed of a part 23. Then, as shown in FIG. 11, when the lid 20 is attached to the access opening 10a of the main body casing 10, the inner lid unit 24 is first fitted in the access opening 10a of the main body casing 10. By fixing the outer lid 21 to the lid mounting portion 12 with screws, the display portion 28 and the like of the inner lid unit 24 can be visually recognized from the front side of the main body casing 10 through the window portion 23. The internal space of the casing 10 is in a sealed state partitioned from the external environment space in which the gas detection device 100 is installed.

Further, as shown in FIGS. 3, 11, and 12, when the lid body 20 closes the access opening 10a of the main body casing 10 and the lid body is attached, the edge portion of the battery insertion port 30a of the battery storage case 30 30b (in other words, the edge 30b on the access opening 10a side of the battery housing case 30) comes into contact with the back cover 26 of the lid 20.
That is, in the method of assembling the gas detection device 100 of the present embodiment, after the battery accommodating case 30 is mounted in the main body casing 10, the access opening 10a is closed by the lid 20 to cover the back side of the lid. By bringing the portion 26 into contact with the edge portion 30b on the access opening 10a side of the battery accommodating case 30, the internal space of the main body casing 10 becomes the battery accommodating space 31a provided in the battery accommodating case 30 and another space. Explosion resistance is improved because it is surely divided into A1 and A2.

[Another Embodiment]
(1) In the above embodiment, a detachable battery accommodating case 30 is provided in the main body casing 10, and the internal space of the main body casing 10 is divided into a battery accommodating space 31a and other spaces A1 and A2 by the battery accommodating case 30. Although it is configured to be partitioned, the gas detection device according to the present invention is not limited to the configuration provided with such a battery accommodating case 30, for example, a wall portion provided integrally with the main body casing and the like. The battery accommodating space may be configured to be partitioned from the other space by another wall body.

(2) In the above embodiment, with the battery accommodating case 30 mounted in the main body casing 10, the operating battery B is passed through the access opening 10a of the main body casing 10 and the battery insertion port 30a of the battery accommodating case 30. Although it is inserted into the casing 10, for example, after mounting the operating battery B in the battery housing case 30 before mounting, the battery housing case 30 is placed in the main body casing 10 through the access opening 10a of the main body casing 10. It may be configured to be attached.

(3) In the above embodiment, when the lid body with the access opening 10a closed by the lid body 20 is attached, the internal space of the main body casing 10 is reliably divided into the battery accommodating space 31a and the other spaces A1 and A2. Therefore, the back side cover portion 26 of the lid body 20 is configured to be in contact with the edge portion on the battery insertion port 30a side of the battery storage case 30, but the lid is provided as long as the minimum necessary space can be realized. The contact of the edge portion of the battery accommodating case 30 with the back surface side cover portion 26 of the body 20 may be simplified or omitted. Further, the contact of the edge portion of the battery accommodating case 30 with respect to the back side cover portion 26 does not have to be direct, and may be configured so as to abut with a seal member or the like interposed in the gap. Absent.

10 Main body casing 10a Access opening 15 External device connection part 20 Lid body 26 Back side cover part 27 Control circuit 28 Display part 30 Battery storage case 31 Square tubular body (insulating wall)
30a Battery insertion slot 30b Edge 31a Battery storage space (space for permanent equipment)
33 Board mounting part (compartment body)
34 Board mounting part (compartment body)
35 Wiring guide 36 Wiring guide 46 Relay connector for control circuit (relay connector)
55 Relay cable for external equipment (wiring)
100 Gas detector (electrical equipment)
A1 access space (other space)
A1a Space for external devices (other space)
A2 Wiring accommodation space (other space, space for permanent equipment)
B Operating battery U1 sensor unit (gas detector)
U1c cable (wiring)
U2c cable (wiring)

Claims (3)

A main body casing with an explosion-proof structure that has a battery storage space that houses the operating battery in a state of being partitioned from other spaces.
A gas detection device equipped with a gas detection unit that detects a predetermined detection target gas.
The main body casing has an access opening on the front side and has a lid that can open and close the access opening.
The battery accommodating space is configured such that the operating battery can be attached and detached through the access opening .
A gas detection device in which a battery storage case having the battery storage space is detachably provided in the main body casing through the access opening . A main body casing with an explosion-proof structure that has a battery storage space that houses the operating battery in a state of being partitioned from other spaces.
A gas detection device equipped with a gas detection unit that detects a predetermined detection target gas.
The main body casing has an access opening on the front side and has a lid that can open and close the access opening.
The battery accommodating space is configured such that the operating battery can be attached and detached through the access opening.
A battery storage case having the battery storage space is detachably provided in the main body casing.
A gas detection device having a battery insertion port into which the operating battery can be inserted into the battery storage space through an access opening of the main body casing while the battery storage case is mounted in the main body casing . The gas detection device according to claim 2, wherein the back cover portion of the lid body comes into contact with the edge portion of the battery insertion port of the battery storage case when the lid body is attached with the access opening closed by the lid body. ..

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