Fire extinguisher detection unit

Abstract

To provide a fire extinguisher detection unit capable of minimizing a value of the depth dimension (a value of the dimension in the front-back direction) of a box body of a fire extinguisher box for tunnels.SOLUTION: A fire extinguisher detection unit 1 includes: a fire extinguisher installation section 15 provided in a box body 13 and in which a fire extinguisher 11 is installed; a limit switch 17 provided in the box body 13 and at least a part of which overlaps with a fire extinguisher body 39 of the installed fire extinguisher 11, when viewed in a lateral direction; and a moving body 19 provided in the box body 13, including a fire extinguisher contact part 55 and a limit switch contact part 57, and moving between a first position P1 and a second position P2, where the moving body 19 is located at a first position P1 when the fire extinguisher 11 is not installed in the fire extinguisher installation section 15, and is located at a second position P2 when the fire extinguisher 11 is installed, which allows the limit switch 17 to detect whether or not the fire extinguisher 11 is installed.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to a fire extinguisher detection unit, and for example, to a unit for detecting a fire extinguisher housed in a fire box for a tunnel.

Background Art

[0002] Conventionally, a fire extinguisher detection unit for confirming the presence or absence of a fire extinguisher housed in a fire box (box body) for a tunnel has been known (see Patent Document 1 and Patent Document 2). When the presence or absence of a fire extinguisher is confirmed in this way and the fire extinguisher is removed or the like, a notification is made.

[0003] Also, as a fire extinguisher detection unit 301 for detecting a fire extinguisher 309 in a fire box (box body) 303 for a tunnel, for example, the one shown in FIG. 21 may be adopted. The fire extinguisher detection unit 301 includes a box body 303, a limit switch 305 installed in the box body 303, and a rotating body 307 installed in the box body 303 and rotating with respect to the box body 303.

[0004] Then, as shown in FIG. 21(b), when a fire extinguisher 309 is installed in the box body 303, the rotating body 307 abuts against the actuator 311 of the limit switch 305, and the installation of the fire extinguisher 309 is detected. On the other hand, as shown in FIG. 21(a), when the fire extinguisher 309 in the box body 303 is removed, the rotating body 307 rotates from the state shown in FIG. 21(b), and the rotating body 307 moves away from the actuator 311 of the limit switch 305. Thereby, the presence or absence of the installation of the fire extinguisher 309 is detected.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] By the way, in recent years, as shown in FIG. 3, the depth dimension D of the cutout 315 provided in the body of the tunnel 313 may be restricted (there is a tendency to reduce the value of the dimension D). As shown in FIGS. 3 and 4, a tunnel fire extinguisher box 303 is installed in the cutout 313. Further, as shown in FIG. 5, there is also a case where the tunnel fire extinguisher box 303 is installed by exposing it on the wall surface of the tunnel 313 where the cutout 313 is not provided in the body of the tunnel 313 without providing the cutout 313.

[0007] Therefore, there is a demand for thinning the tunnel fire extinguisher box (reducing the value of the dimension in the front-back direction in FIG. 5 of this specification). However, in the box body 303 provided with the fire extinguisher detection unit 301 shown in FIG. 21, the limit switch 305 is installed on the back plate portion 317 of the box body 303. Further, since the limit switch 305 and the rotating body 307 are provided between the fire extinguisher 309 and the back plate portion 317, a dimension W1 for providing the limit switch 305 and the rotating body 307 is required, and the value of the dimension W3 in the front-back direction (depth direction) of the box body becomes large.

[0008] An object of the present invention is to provide a fire extinguisher detection unit capable of minimizing the value of the depth dimension (the value of the dimension in the front-back direction) of the box body of the tunnel fire extinguisher box.

Means for Solving the Problems

[0009] The fire extinguisher detection unit according to an aspect of the present invention includes a box body configured to include a back plate portion, side plate portions, and an upper plate portion, a fire extinguisher installation portion provided in the box body where a fire extinguisher is installed, a limit switch provided in the box body and at least partially overlapping with the fire extinguisher body of the fire extinguisher installed in the fire extinguisher installation portion when viewed in the thickness direction of the side plate portion, and a fire extinguisher contact portion provided in the box body near the back plate portion and contacting the fire extinguisher body, and a limit switch contact portion contacting the actuator of the limit switch. The moving body is configured to be supported by the box body and move between a first position and a second position with respect to the box body. When the fire extinguisher is not installed in the fire extinguisher installation portion, the moving body is located at the first position with a biasing force. When the fire extinguisher is installed in the fire extinguisher installation portion, the fire extinguisher body contacts the fire extinguisher contact portion and is pushed by the fire extinguisher body to be located at the second position. The limit switch contact portion pushes the actuator of the limit switch, and the limit switch is configured to detect whether the fire extinguisher is installed in the fire extinguisher installation portion.

[0010] Further, in the fire extinguisher detection unit according to an aspect of the present invention, the moving body rotates with respect to the box body about a first axis extending in a lateral direction that is orthogonal to the thickness direction of the side plate portion, and moves between the first position and the second position. The limit switch is a roller lever type limit switch, and this roller lever type limit switch includes a limit switch body supported by the box body and containing an internal switch, a lever portion protruding from the limit switch body, and a roller provided at the tip of the lever portion. The lever portion rotates with respect to the limit switch body about a second axis extending in the lateral direction at the base end portion thereof. The roller rotates with respect to the lever portion about a third axis extending in the lateral direction at the tip of the lever portion, and the roller is configured to contact the limit switch contact portion of the moving body and push the lever portion to rotate.

[0011] Further, in the fire extinguisher detection unit according to an aspect of the present invention, the protruding direction of the operating lever from the fire extinguisher body and the extending direction of the hose from the fire extinguisher body are oblique with respect to the thickness direction of the back plate portion, and moreover, the hose is located on the back plate portion side and the operating lever is located on the side opposite to the back plate portion, so that the fire extinguisher is configured to be installed in the fire extinguisher installation portion.

[0012] Further, in the fire extinguisher detection unit according to an aspect of the present invention, the limit switch contact portion of the moving body covers the limit switch.

[0013] Further, in the fire extinguisher detection unit according to an aspect of the present invention, as the limit switch, a first limit switch for sending a signal indicating whether or not the fire extinguisher is installed in the fire extinguisher installation portion to the disaster prevention receiving board, and a second limit switch for changing the display on the display unit according to whether or not the fire extinguisher is installed in the fire extinguisher installation portion are provided, and the first limit switch and the second limit switch are provided in the front-back direction which is the thickness direction of the back plate portion.

[0014] Further, in the fire extinguisher detection unit according to an aspect of the present invention, a frame is configured to include an upper plate portion different from the upper plate portion of the box body and a side plate portion different from the side plate portion of the box body and is installed in the box body inside the box body, the moving body is supported by the box body via the frame, the limit switch is provided in the box body via the frame, and a notch is provided in the upper plate portion of the frame to avoid interference between the fire extinguisher body and the hose of the fire extinguisher installed in the fire extinguisher installation portion.

[0015] Moreover, the fire extinguisher detection unit according to an aspect of the present invention is installed inside a box body configured to include a back plate portion, a side plate portion, and an upper plate portion, and having a fire extinguisher installation portion where a fire extinguisher is installed inside. The fire extinguisher detection unit includes a frame configured to include an upper plate portion different from the upper plate portion of the box body and a side plate portion different from the side plate portion of the box body, a limit switch provided on the side plate portion of the frame inside the frame, and a fire extinguisher contact portion provided inside the frame near the back plate portion of the frame and contacting the fire extinguisher body, and a limit switch contact portion contacting the actuator of the limit switch. The fire extinguisher detection unit has a moving body supported by the frame and moving between a first position and a second position with respect to the frame. When the fire extinguisher is not installed in the fire extinguisher installation portion, the moving body is located at the first position with an urging force. When the fire extinguisher is installed in the fire extinguisher installation portion, the fire extinguisher body contacts the fire extinguisher contact portion, and the moving body is pushed by the fire extinguisher body to be located at the second position. The limit switch contact portion presses the actuator of the limit switch, and the limit switch is configured to detect that the fire extinguisher has been installed in the fire extinguisher installation portion. A notch is provided on the upper plate portion of the frame to avoid interference between the fire extinguisher body and the hose of the fire extinguisher installed in the fire extinguisher installation portion.

Advantages of the Invention

[0016] According to the present invention, there is an effect that the value of the depth dimension of the box body of the fire hydrant box for tunnels can be minimized as much as possible.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Embodiments for Carrying Out the Invention

[0018] The fire extinguisher detection unit (fire extinguisher detection device) 1 according to an embodiment of the present invention is used, for example, for a fire hydrant device 5 installed in a road tunnel 3 as shown in FIGS. 3 and 4. The fire hydrant device 5 is installed in a cutout 7 provided in the road tunnel 3. As shown in FIG. 5, there may be a case where the fire hydrant device 5 is provided in a road tunnel 3 where no cutout 7 is provided.

[0019] Further, the fire hydrant devices 5 are installed at intervals of, for example, 50 m in the extending direction of the road tunnel 3 and are arranged on one side or both sides of the road tunnel 3.

[0020] Here, for the sake of convenience of explanation, a predetermined one direction in the fire extinguisher detection unit 1 (fire hydrant device 5) is defined as the vertical direction, a predetermined position direction orthogonal to the vertical direction is defined as the horizontal direction, and a direction orthogonal to both the vertical direction and the horizontal direction is defined as the front-back direction (depth direction). In a state where the fire hydrant device 5 is installed in the road tunnel 3, the horizontal direction of the fire extinguisher detection unit 1 (fire hydrant device 5) is the extending direction of the road tunnel 3.

[0021] As shown in FIGS. 1 and 2, the fire hydrant device 5 includes a fire hydrant box (road tunnel fire hydrant box) 9 in which a fire hose (not shown) is housed inside, and a box body (road tunnel fire extinguisher box; outer housing) 13 in which a fire extinguisher 11 is housed inside. The fire extinguisher detection unit 1 detects whether or not a fire extinguisher 11 is installed in the box body 13. As shown in FIG. 1, the fire hydrant box 9 and the box body 13 are connected to each other in the horizontal direction, and the appearance of the fire hydrant box 9 and the box body 13 is in a rectangular parallelepiped shape. The fire hydrant box 9 and the box body 13 may be connected to each other in the horizontal direction, or only the box body 13 may be installed in an independent configuration.

[0022] As shown in FIGS. 2(b), 6 to 12, the fire extinguisher detection unit 1 includes a box body 13, a fire extinguisher installation part (fire extinguisher placement part) 15, a limit switch 17, and a moving body (interlocking body) 19. The box body 13 includes a bottom plate part (outer bottom plate part) 21, a back plate part (outer back plate part) 23, side plate parts (outer side plate parts) 25, a top plate part (outer top plate part) 27, and a front plate part 29, and is formed in a rectangular parallelepiped shape.

[0023] More specifically, the box body 13 is composed of a single rectangular plate-shaped bottom plate part 21, a single rectangular plate-shaped back plate part 23, two rectangular plate-shaped side plate parts 25, a single rectangular plate-shaped top plate part 27, and a single rectangular plate-shaped front plate part 29.

[0024] The thickness direction of the bottom plate part 21 and the top plate part 27 is the vertical direction. The bottom plate part 21 is located on the lower side in the vertical direction, and the top plate part 27 is located on the upper side in the vertical direction. The thickness direction of the back plate part 23 and the front plate part 29 is the front-back direction. The back plate part 23 is located on the back side in the front-back direction, and the front plate part 29 is located on the front side in the front-back direction. The thickness direction of the two side plate parts 25 is the horizontal direction. One of the two side plate parts 25 is located on one side in the horizontal direction, and the other side plate part is located on the other side in the horizontal direction. The inside of the box body 13 is a rectangular parallelepiped-shaped space (fire extinguisher accommodation space) 31.

[0025] An opening 33 is provided in the front plate part 29. Also, doors 35, 37 for opening and closing the opening 33 are provided in the front plate part 29. By opening the door 35, the fire extinguisher 11 can be taken in and out of the fire extinguisher accommodation space 31 of the box body 13. The fire extinguisher installation part 15 is provided inside the box body 13. The fire extinguisher 11 stands upright above the bottom plate part 21 and is installed inside the box body 13.

[0026] As shown in Fig. 2, the fire extinguisher 11 includes a fire extinguisher body 39 formed in a cylindrical shape, an operating lever 41 provided on the upper part of the fire extinguisher body 39, and a hose 43 extending from the upper part of the fire extinguisher body 39. The fire extinguisher body 39 is filled with a fire extinguishing agent. The operating lever 41 is composed of a lower lever 41A and an upper lever 41B. The lower lever 41A is integrated with the fire extinguisher body 39. The upper lever 41B rotates with respect to the lower lever 41A and the fire extinguisher body 39 with its base end as the rotation center. When the upper lever 41B is operated and rotates downward, the fire extinguishing agent in the fire extinguisher body 39 is discharged from a nozzle 45 provided at the tip of the hose 43.

[0027] When viewed in plan view (when viewed in the height direction of the cylindrical fire extinguisher body 39 which is in the vertical direction), as shown in Fig. 2(b), the lower lever 41A and the upper lever 41B generally overlap each other, and the lower lever 41A and the upper lever 41B protrude from the central part of the fire extinguisher body 39. Further, the lower lever 41A and the upper lever 41B protrude outside the outer circumference of the fire extinguisher body 39, and the tip portions of the lower lever 41A and the upper lever 41B are located outside the fire extinguisher body 39.

[0028] Also, when viewed in plan view, the hose 43 also extends from the central part of the fire extinguisher body 39. And the hose 43 also protrudes outside the outer circumference of the fire extinguisher body 39, and the middle part and the tip part of the hose 43 are located outside the fire extinguisher body 39.

[0029] Furthermore, when viewed in plan view, in the extending direction of a predetermined straight line L1 passing through the center of the fire extinguisher body 39, the lower lever 41A, the upper lever 41B, and the hose 43 protrude and extend from the central part of the fire extinguisher body 39. However, the protruding direction of the lower lever 41A and the upper lever 41B and the extending direction of the hose 43 are opposite. The straight line L1 is inclined and extends with respect to the front-back direction and the horizontal direction.

[0030] The limit switch 17 is provided inside the box body 13. As shown in FIG. 16, at least a part of the limit switch 17 overlaps with the fire extinguisher main body 39 of the fire extinguisher (installed fire extinguisher) 11 installed in the fire extinguisher installation part 15 when viewed in the thickness direction (lateral direction) of the side plate part 25 of the box body 13.

[0031] Since at least a part of the limit switch 17 overlaps with the fire extinguisher main body 39 of the installed fire extinguisher 11 when viewed in the lateral direction, it is desirable that the limit switch 17 be supported by the box body 13 at the side plate part 25 of the box body 13 in order to avoid complication of the structure.

[0032] Also, in the aspect where at least a part of the limit switch 17 overlaps with the fire extinguisher main body 39 of the installed fire extinguisher 11 when viewed in the lateral direction, as shown in FIG. 16, the front side part of the limit switch 17 overlaps with the fire extinguisher main body 39. Note that when viewed in the lateral direction, all of the limit switch 17 may overlap with the fire extinguisher main body 39 of the installed fire extinguisher 11.

[0033] When viewed in the front-back direction, as shown in FIG. 9, the limit switch 17 is provided in the space between the side plate part 25 of the box body 13 and the installed fire extinguisher 11. When viewed in the up-down direction, the limit switch 17 and the installed fire extinguisher 11 are separated from each other.

[0034] As shown in FIGS. 16 to 18, the limit switch 17 includes a limit switch main body 47 in which an internal switch is housed, and an actuator 49 protruding from the limit switch main body 47. The limit switch main body 47 is supported by the box body 13 and is integrated with the box body 13. If the limit switch 17 is a roller lever type limit switch, the actuator 49 includes a lever part 51 and a roller 53 provided at the tip of the lever part 51. The roller 53 rotates with respect to the lever part 51. The lever part 51 rotates (swings) with respect to the limit switch main body 47 with its base end part as the rotation center.

[0035] In the normal state (a state where no force is applied to the lever part 51 to rotate the lever part 51), the lever part 51 is located at a predetermined rotation position (normal rotation position) with a predetermined biasing force (see Fig. 17). When an object (moving body 19) contacts the roller 53 of the lever part 51 and the roller 53 is pushed, the lever part 51 rotates from the normal rotation position. When the value of the rotation angle of the lever part 51 reaches a predetermined magnitude, the limit switch 17 detects the object (see Fig. 18). When the object disappears, the lever part 51 returns to the normal rotation position. Limit switches 17A and 17B are provided as limit switches 17 for detecting one fire extinguisher 11. As the limit switch 17A, for example, "type D4CC-1060" manufactured by Omron Corporation is adopted. As the limit switch 17B, for example, "type D4CC-3060" manufactured by Omron Corporation is adopted. The protection structure of these limit switches 17 is IP67.

[0036] The limit switch 17A is a DC48V, non-voltage a-contact, and when the fire extinguisher 11 is moved (removed), it signals on and notifies a signal to a disaster prevention receiving panel (not shown). These limit switches 17 are AC100V or DC48V, non-voltage a-contact, and when the fire extinguisher 11 moves, they are energized and the indicator lamp 59 lights up.

[0037] The moving body 19 is provided in the box body 13 near the back plate part 23 and is configured to include a fire extinguisher contact part 55 and a limit switch contact part 57 as shown in Figs. 13 to 15, 17, and 18. The fire extinguisher contact part 55 contacts the side surface of the fire extinguisher main body 39. The limit switch contact part 57 contacts the actuator 49 (roller 53) of the limit switch 17. Also, the moving body 19 is supported by the box body 13 and moves (rotates) between a first position P1 (see Fig. 17) and a second position P2 (see Fig. 18) with respect to the box body 13.

[0038] As shown in FIGS. 17 and 18, in the front-back direction, most of the moving body 19 is located on the back side of the fire extinguisher installation part 15 and the installed fire extinguisher 11. Further, the movement of the moving body 19 includes not only the translational movement of the moving body 19 but also the rotational movement of the moving body 19 in which the posture of the moving body 19 changes. As the movement of the moving body 19, there can be mentioned a mode in which the moving body 19 only makes a translational movement, or a mode in which the moving body 19 only makes a rotational movement, or a mode in which the moving body 19 makes a translational movement and a rotational movement. In the fire extinguisher detection unit 1 according to the present embodiment, as already understood, the moving body 19 is in a mode of only rotating with respect to the box body 13.

[0039] When the fire extinguisher 11 is not installed in the fire extinguisher installation part 15, the moving body 19 is located at the first position (first rotation position) P1 with an urging force (see FIG. 17). When the fire extinguisher 11 is installed in the fire extinguisher installation part 15, the moving body 19 is pushed by the fire extinguisher main body 39 to the second position (second rotation position) P2 even though the above-mentioned urging force is applied due to the fire extinguisher main body 39 abutting against the fire extinguisher abutting part 55 (see FIG. 18). In FIG. 18, the display of the fire extinguisher 11 is omitted.

[0040] The limit switch 17 detects whether the fire extinguisher 11 is installed in the fire extinguisher installation part 15 according to the change in the position of the moving body 19. That is, when the moving body 19 is located at the second position P2, the limit switch abutting part 57 presses the actuator 49 of the limit switch 17, and the limit switch 17 detects that the fire extinguisher 11 has been installed in the fire extinguisher installation part 15.

[0041] To explain further, when the fire extinguisher 11 is installed in the fire extinguisher installation part 15, the moving body 19 is pushed by the fire extinguisher 11 and located at the second position P2, the lever part 51 of the limit switch 17 rotates, and the limit switch 17 is in a state of detecting the fire extinguisher 11. Also, when the fire extinguisher 11 is removed from the fire extinguisher installation part 15, the moving body 19 is located at the first position P1 by the above-mentioned urging force, the lever part 51 of the limit switch 17 returns to the normal rotation position, and the limit switch 17 is in a state of not detecting the fire extinguisher 11.

[0042] Further, as shown in FIGS. 1 and 6, the fire extinguisher detection unit 1 is provided with a display unit 59 that indicates whether or not a fire extinguisher 11 is installed in the fire extinguisher installation section 15. A display lamp (lamp) is adopted as the display unit 59, and the display lamp 59 is provided on the outer surface (front side surface) of the box body 13 so as to be visible from the outside of the box body 13. The display lamp 59 goes out when the limit switch 17 detects the fire extinguisher 11 (when the fire extinguisher 11 is installed in the fire extinguisher installation section 15). The display lamp 59 lights up when the limit switch 17 does not detect the fire extinguisher 11 (when no fire extinguisher is installed in the fire extinguisher installation section).

[0043] Further, the moving body 19 is located in the vicinity of the back plate portion 23 and rotates only with respect to the box body 13 about a first axis C1 (see FIGS. 17 and 18) that extends in the lateral direction, which is a direction orthogonal to the thickness direction of the side plate portion 25. Thereby, the moving body 19 rotates between a first position P1 and a second position P2. Note that most of the moving body 19 is located below the first axis C1. Also, the axis C1 is located on the back side of the installed fire extinguisher 11 in the front-back direction.

[0044] As described above, for example, a roller lever type limit switch is adopted as the limit switch 17. The roller lever type limit switch 17 includes a limit switch main body 47 in which an internal switch is housed, a lever portion 51 protruding from the limit switch main body 47, and a roller 53 provided at the tip of the lever portion 51. The limit switch main body 47 is integrally provided on the box body 13 as described above.

[0045] The lever portion 51 rotates with respect to the limit switch main body 47 about a second axis C2 that extends in the lateral direction at the base end portion thereof. The roller 53 rotates with respect to the lever portion 51 about a third axis C3 that extends in the lateral direction at the tip of the lever portion 51. Then, when the roller 53 abuts against the limit switch abutting portion 57 of the moving body 19, the lever portion 51 is pushed and rotated.

[0046] When the moving body 19 is at the first position P1 and the second position P2, the fire extinguisher contact portion 55 is located below the first axis C1 in the vertical direction, closer to the front side than the first axis C1 in the front-back direction, and at the center of the installed fire extinguisher 11 in the lateral direction. Also, when the moving body 19 is at the first position P1 and the second position P2, the limit switch contact portion 57 is located below the first axis C1 in the vertical direction, closer to the front side than the first axis C1 in the front-back direction, and on the side plate portion 25 side rather than the fire extinguisher main body 39 in the lateral direction.

[0047] Note that when the moving body 19 is at the second position P2, as shown in FIGS. 17 and 18, the fire extinguisher contact portion 55 and the limit switch contact portion 57 are located on the back side in the front-back direction compared to when at the first position P1.

[0048] Also, as shown in FIG. 2(b) described above, in the installed fire extinguisher 11, the protruding direction of the operating lever 41 from the fire extinguisher main body 39 and the extending direction of the hose 43 from the fire extinguisher main body 39 are oblique with respect to the front-back direction. Moreover, in the installed fire extinguisher 11, the hose 43 is located on the back plate portion 23 side, and the operating lever 41 is located on the side opposite to the back plate portion 23 (front plate portion side). Note that the installed fire extinguisher 11 is in the form at the time of factory shipment before use.

[0049] When viewing the installed fire extinguisher 11 in plan view, the protruding direction of the operating lever 41 from the center of the fire extinguisher main body 39 and the extending direction of the hose 43 from the center of the fire extinguisher main body 39 are inclined obliquely with respect to the front-back direction by about 30° to 60°. More preferably, it is inclined by about 40° to 50°, and even more preferably by about 45°.

[0050] When looking at the installed fire extinguisher 11 from a position away from the front side of the box body 13 toward the back side, as shown in FIGS. 7 to 9, for example, the operating lever 41 is located on the right side of the fire extinguisher main body 39, and the hose 43 is located on the left side of the fire extinguisher main body 38.

[0051] Further, in the fire extinguisher detection unit 1, the limit switch contact portion 57 of the moving body 19 covers the limit switch 17. To explain further, for example, the limit switch contact portion 57 of the moving body 19 and the portion in the vicinity of the limit switch contact portion 57 are located above the limit switch 17 and cover the actuator 49 of the limit switch 17.

[0052] View the moving body 19 and the limit switch 17 from above the moving body 19 downward. Then, regardless of the position of the moving body 19, the limit switch contact portion 57 of the moving body 19 and the portion in the vicinity of the limit switch contact portion 57 cover the entire actuator 49 of the limit switch 17.

[0053] Further, in the fire extinguisher detection unit 1, as the limit switch 17, as shown in FIGS. 17 and 18 described above, a first limit switch 17A and a second limit switch 17B are provided.

[0054] The first limit switch 17A is provided to send a signal indicating whether or not the fire extinguisher 11 is installed in the fire extinguisher installation portion 15 to a disaster prevention receiving panel (not shown). The second limit switch 17B is provided to change the display on the display unit 59 according to whether or not the fire extinguisher 11 is installed in the fire extinguisher installation portion 15. That is, the second limit switch 17B is provided to turn off the indicator lamp 59 when the fire extinguisher 11 is installed in the fire extinguisher installation portion 15 and to turn on the indicator lamp 59 when the fire extinguisher 11 is not installed in the fire extinguisher installation portion 15.

[0055] The first limit switch 17A and the second limit switch 17B are arranged in the same position in the vertical direction and the horizontal direction, and are also provided in the front-back direction which is the thickness direction of the back plate portion 23.

[0056] Further, as shown in FIG. 12, the fire extinguisher detection unit 1 includes a frame (inner housing) 61. The frame 61 includes a back plate portion (inner back plate portion) 63 different from the back plate portion 23 of the box body 13, an upper plate portion (inner upper plate portion) 65 different from the upper plate portion 27 of the box body 13, and side plate portions (inner side plate portions) 67 different from the side plate portions 25 of the box body 13. Further, the frame 61 is integrally installed in the box body 13 inside the box body 13.

[0057] More specifically, the frame 61 includes a single rectangular plate-shaped back plate portion 63, two rectangular plate-shaped side plate portions 67, and a single rectangular plate-shaped upper plate portion 65.

[0058] When the frame 61 is installed in the box body 13, the thickness direction of the upper plate portion 65 is the vertical direction, the thickness direction of the back plate portion 63 is the front-back direction, and the thickness direction of the two side plate portions 67 is the horizontal direction. When the frame 61 is installed in the box body 13, one of the two side plate portions 67 is located on one side in the horizontal direction, and the other side plate portion is located on the other side in the horizontal direction.

[0059] The moving body 19 is supported by the box body 13 via the frame 61, and the limit switch 17 (limit switch body 47) is integrally provided on the box body 13 via the frame 61. Further, a rectangular notch 69 is provided in the upper plate portion 65 of the frame 61 to avoid interference with the fire extinguisher body 39 and the hose 43 of the fire extinguisher 11 installed in the fire extinguisher installation portion 15.

[0060] When the frame 61 is installed in the box body 13, the back plate portion 63 of the frame 61 is slightly separated from the back plate portion 23 of the box body 13, but the back plate portion 63 of the frame 61 may be in contact with the back plate portion 23 of the box body 13 so as to overlap. When the frame 61 is installed in the box body 13, each of the two side plate portions 67 of the frame 61 is separated from each of the two side plate portions 25 of the box body 13. It should be noted that when the frame 61 is installed in the box body 13, each of the side plate portions 67 of the frame 61 may be in contact with each of the two side plate portions 25 of the box body 13 so as to overlap.

[0061] Furthermore, with the frame 61 installed on the box body 13, one side plate portion 67 of the frame 61 may contact and overlap one side plate portion 25 of the box body 13, and the other side plate portion 67 of the frame 61 may be separated from the other side plate portion 25 of the box body 13. When the frame 61 is installed on the box body 13, the upper plate portion 65 of the frame 61 is separated from the box body 13.

[0062] The limit switch 17 is provided on the side plate portion 67 inside the frame 61. That is, the limit switches 17 are provided so as to face each other inside the frame 61. Further, the limit switch 17 is integrally provided on the side plate portion 67 of the frame 61 with the limit switch body 47 directly contacting the side plate portion 67 of the frame 61.

[0063] The moving body 19 is supported by the frame 61 inside the frame 61. Further, the moving body 19 is supported by the upper plate portion 65 of the frame 61, but the moving body 19 may be supported by the back plate portion 63 or the side plate portion 67 of the frame 61.

[0064] The limit switch 17 installed on the frame 61 and the moving body 19 are located between the upper plate portion 65 and the lower ends of the back plate portion 63 and the side plate portion 67 in the vertical direction. The limit switch 17 installed on the frame 61 and the moving body 19 are located between the two side plate portions 67 in the horizontal direction, and are located between the back plate portion 63 and the front ends of the upper plate portion 65 and the side plate portion 67 in the front-back direction.

[0065] The notch 69 in the upper plate portion 65 of the frame 61 penetrates the web portion of the upper plate portion 65 in the thickness direction of the upper plate portion 65 of the frame 61 and is formed in a rectangular shape when viewed in the vertical direction. Further, the notch 69 in the upper plate portion 65 extends longitudinally in the lateral direction at the middle portion in the lateral direction of the upper plate portion 65. Furthermore, the notch 69 in the upper plate portion 65 is provided from the front side end of the upper plate portion 65 to the middle portion of the upper plate portion 65 in the front-back direction. Thereby, when viewed in the vertical direction, the upper plate portion 65 of the frame 61 has a "U" shape. By providing the "U"-shaped notch 69, a margin is created in the installation space for the fire extinguisher 11, and fire extinguishers 11 of various forms can be installed in the fire extinguisher installation portion 15.

[0066] In a state where the frame 61 is installed in the box body 13 and the fire extinguisher 11 is installed in the fire extinguisher installation portion 15, the frame 61 is located at the middle portion of the fire extinguisher body 39 in the vertical direction. Also, in a state where the frame 61 is installed in the box body 13 and the fire extinguisher 11 is installed in the fire extinguisher installation portion 15, as shown in FIG. 2(b), the notch 69 in the upper plate portion 65 is penetrated by the fire extinguisher body 39 and the hose 43 of the fire extinguisher 11 in the vertical direction. Furthermore, in a state where the frame 61 is installed in the box body 13 and the fire extinguisher 11 is installed in the fire extinguisher installation portion 15, the hose 43 of the fire extinguisher 11 penetrates the notch 69 near the corner of the rectangular notch 69.

[0067] Note that, in a state where the moving body 19 and the limit switch 17 are installed on the frame 61, the frame 61 can be separated from the box body 13 together with the moving body 19 and the limit switch 17. That is, the moving body 19, the limit switch 17, and the frame 61 are unitized. And the moving body 19, the limit switch 17, and the frame 61 can be easily installed on the box body 13 from a state where they are not installed on the box body 13. Also, the moving body 19, the limit switch 17, and the frame 61 can be easily removed from a state where they are installed on the box body 13. The frame 61 is fixed to the box body 13 using, for example, fasteners such as bolts.

[0068] Also, in the above description, the frame 61 is configured to include the back plate portion 63, the upper plate portion 65, and the side plate portion 67, but the back plate portion 63 may be deleted.

[0069] Here, the fire extinguisher detection unit 1 will be described in more detail. As shown in FIG. 7 and the like, two fire extinguishers 11 are installed in the fire extinguisher installation section 15. Note that the configuration may be such that one or three or more fire extinguishers 11 are installed in the fire extinguisher installation section 15.

[0070] In the configuration where two fire extinguishers 11 are installed in the fire extinguisher installation section 15, two limit switches 17 are installed on one side plate portion 67 of the frame 61, and two limit switches 17 are installed on the other side plate portion 67 of the frame 61. As a result, four limit switches 17 are installed on one frame 61. Also, in FIG. 7 and the like, the two installed fire extinguishers 11 are arranged horizontally and in contact with each other, but as shown in FIG. 2(b), the two installed fire extinguishers 11 may be arranged horizontally and separated from each other.

[0071] Here, with reference to FIG. 16, the positional relationship between the two limit switches 17A and 17B installed on one side plate portion 67 and the installed fire extinguisher 11 when viewed in the horizontal direction will be described in more detail. In the aspect shown in FIG. 16, when viewed in the horizontal direction, all of the limit switches 17A overlap the installed fire extinguisher 11. On the other hand, for the limit switch 17B, only about half of the front side portion overlaps the installed fire extinguisher 11.

[0072] Also, as shown in FIG. 9 and the like, a rectangular flat fire extinguisher carrier 71 is provided inside the box body 13. The fire extinguisher carrier 71 is integrally installed on the lower end portion of the box body 13 such that its thickness direction is the vertical direction. Two circular through holes 73 are provided in the fire extinguisher carrier 71. The two through holes 73 are arranged horizontally and penetrate the fire extinguisher carrier 71 in this thickness direction.

[0073] At the lower end of the fire extinguisher body 39, a low cylindrical small-diameter portion 75 is provided. A stepped portion 77 is formed at the upper end of the small-diameter portion 75. In a state where the fire extinguisher 11 is installed in the fire extinguisher installation portion 15, the small-diameter portion 75 of the fire extinguisher body 39 enters the through-hole 73 of the fire extinguisher placement body 71, and the stepped portion 77 abuts against the upper surface of the fire extinguisher placement body 71. Thereby, the fire extinguisher 11 is positioned and installed in the fire extinguisher installation portion 15. Note that a configuration in which the fire extinguisher placement body 71 is deleted may also be adopted.

[0074] Here, the fire extinguisher placement body 71 will be described with reference to FIG. 19. The fire extinguisher placement body 71 shown in FIG. 19 is, for example, a separate component from the box body 13. That is, the fire extinguisher placement body 71 is configured by connecting two fire extinguisher placement body components 89 shown in FIG. 19 to each other in the horizontal direction. One fire extinguisher placement body component 89 includes one placement body upper plate portion 91, a pair of placement body side plate portions (lateral side plate portions) 93, a pair of placement body side plate portions (front-back direction side plate portions) 95, and a pair of folded plate portions 97. In the fire extinguisher placement body 71 shown in FIG. 19, the through-hole 73 shown in FIG. 9 is not provided.

[0075] The placement body upper plate portion 91 is formed in a rectangular flat plate shape with the thickness direction being the vertical direction. The through-hole 74 is provided at the center of the placement body upper plate portion 91 when viewed in the vertical direction. The through-hole 74 is a handle used for lifting the fire extinguisher placement body component 89 or the like.

[0076] The placement body side plate portion 93 is in a rectangular flat plate shape with the thickness direction being the horizontal direction and the value of the dimension in the vertical direction being smaller than the value of the dimension in the front-back direction. The value of the dimension in the front-back direction of the placement body side plate portion 93 is equal to the value of the dimension in the front-back direction of the placement body upper plate portion 91. One of the pair of placement body side plate portions 93 protrudes downward from one end in the horizontal direction of the placement body upper plate portion 91. The other placement body side plate portion 93 of the pair of placement body side plate portions 93 protrudes downward from the other end in the horizontal direction of the placement body upper plate portion 91.

[0077] The mounting body side plate portion 95 is in a rectangular flat plate shape with its thickness direction being the front-back direction and the value of the dimension in the vertical direction being smaller than the value of the dimension in the horizontal direction. The value of the dimension in the horizontal direction of the mounting body side plate portion 95 is equal to the value of the dimension in the horizontal direction of the mounting body upper plate portion 91. One of the pair of mounting body side plate portions 95 protrudes downward from the front-side end in the front-back direction of the mounting body upper plate portion 91. The other mounting body side plate portion 95 of the pair of mounting body side plate portions 95 protrudes downward from the back-side end in the front-back direction of the mounting body upper plate portion 91. Note that the value of the dimension in the vertical direction of the mounting body side plate portion 95 is larger than the value of the dimension in the vertical direction of the mounting body side plate portion 93.

[0078] The folding plate portion 97 is formed in a rectangular flat plate shape with its thickness direction being the vertical direction. The folding plate portion 97 is in a rectangular plate shape with the value of the dimension in the front-back direction being smaller than the value of the dimension in the horizontal direction. Note that the value of the dimension in the front-back direction of the folding plate portion 97 is smaller than the value of the dimension in the vertical direction of the mounting body side plate portion 95.

[0079] One of the pair of folding plate portions 97 protrudes from the lower end of the mounting body side plate portion 95 on the front side in the front-back direction to the back side in the front-back direction. The other folding plate portion 97 of the pair of folding plate portions 97 protrudes from the lower end of the mounting body side plate portion 95 on the back side in the front-back direction to the front side in the front-back direction.

[0080] When looking at the fire extinguisher mounting body structure 89 in the vertical direction, it has substantially the same shape as the mounting body upper plate portion 91. In a state where the fire extinguisher mounting body structure 89 is installed in the box body 13, the pair of folding plate portions 97 are in contact with the bottom plate portion 21 of the box body 13. Also, in the installed fire extinguisher 11, the step portion 77 of the fire extinguisher main body 39 abuts against the mounting body upper plate portion 91. Then, the installed fire extinguisher 11 and the mounting body upper plate portion 91 are in a state of being raised and separated from the bottom plate portion 21 of the box body 13, and the installed fire extinguisher 11 and the mounting body upper plate portion 91 are less likely to rust.

[0081] In the fire extinguisher placement body structure 89, a space is formed below the upper plate portion 91 of the placement body. Also, an opening of the above space is formed below the side plate portion 93 of the placement body. And cables such as wiring can be passed through the above space.

[0082] Note that in the fire extinguisher placement body 71 (the fire extinguisher placement body structure 89 shown in Fig. 19), the through hole 73 is not provided, but a through hole 73 may be provided in the fire extinguisher placement body structure 89 shown in Fig. 19. That is, the through hole indicated by reference numeral 74 in Fig. 19 may be used as the through hole 73 into which the small diameter portion 75 of the fire extinguisher 11 enters. Also, in the fire extinguisher placement body structure 89, the side plate portion 93 of the placement body, the side plate portion 95 of the placement body, and the folded-back plate portion 97 may be interchanged. That is, the thickness direction of the side plate portion 93 of the placement body may be the front and back direction, and the thickness direction of the side plate portion 95 of the placement body may be the lateral direction.

[0083] Furthermore, as shown in Fig. 20, the fire extinguisher placement body structure 89 may be extended to twice the length in the lateral direction, and two through holes 73 may be provided at appropriate intervals in the lateral direction. And two fire extinguishers 11 may be installed in one structure 89. What is indicated by reference numeral 74 in Fig. 20 is, for example, a handle composed of a through hole and used for lifting the fire extinguisher placement body structure 89.

[0084] As shown in Fig. 12, the "U" - shaped edge of the notch 69 in the upper plate portion 65 of the frame 61 is covered with a cushioning material 79 made of an elastic material such as rubber. The cushioning material 79 is provided to prevent the fire extinguisher 11 from hitting the frame 61 and being damaged.

[0085] The moving body 19 is in a state where a flat - plate - shaped material of a predetermined shape has been appropriately processed such as bent. As shown in Figs. 13 to 15, the moving body 19 includes a fire extinguisher contact portion component 81 that constitutes the fire extinguisher contact portion 55, a limit switch contact portion component 83 that constitutes the limit switch contact portion 57, and a contact portion connecting portion 85. The contact portion connecting portion 85 connects the fire extinguisher contact portion component 81 and the limit switch contact portion component 83.

[0086] The fire extinguisher contact portion component 81 and the limit switch contact portion component 83 are separated from each other in the lateral direction. The moving body 19 is supported by the frame 61 via a spring hinge 87 as shown in FIGS. 17 and 18. The spring hinge 87 is provided at the upper end portion of the fire extinguisher contact portion component 81. The portion of the fire extinguisher contact portion component 81 that directly contacts the installed fire extinguisher 11 is formed at the lower end portion of the fire extinguisher contact portion component 81. The moving body 19 is positioned at the first position P1 with a biasing force by the spring hinge 87.

[0087] One moving body 19 is provided for one fire extinguisher 11. Therefore, in the mode where two fire extinguishers 11 are installed in the fire extinguisher installation portion 15, two moving bodies 19 are provided on one frame 61. When one moving body 19 contacts the fire extinguisher body 39, the limit switch contact portion 57 of one moving body 19 simultaneously contacts the actuators 49 of the two limit switches 17A and 17B as already understood.

[0088] Also, the installed fire extinguisher 11 is symmetric with respect to the central plane of the frame 61 (a plane including the center of the frame 61 and orthogonal to the lateral direction). The limit switch 17 and the moving body 19 provided on the frame 61 are symmetric with respect to the central plane of the frame 61.

[0089] The indicator light 59 lights up when one of the two fire extinguishers 11 is removed from the fire extinguisher installation portion 15, but may be made to emit light when both of the two fire extinguishers 11 are removed from the fire extinguisher installation portion 15. Further, one moving body 19 and two limit switches 17A and 17B may be provided on one frame 61. And when both of the two fire extinguishers 11 contact one moving body 19 and both of the two fire extinguishers 11 are removed from the fire extinguisher installation portion 15, the indicator light 59 may be made to light up.

[0090] Here, the operation of the fire extinguisher detection unit 1 will be described. In the initial state, as shown in FIG. 7 and the like, two fire extinguishers 11 are installed in the fire extinguisher installation section 15. As shown in FIG. 18, the moving body 19 is located at the second rotation position P2, the moving body 19 abuts against the limit switch 17, and the indicator light 59 is turned off.

[0091] In the above initial state, open the door 35 and remove one of the two fire extinguishers 11. Then, one of the two moving bodies 19 rotates from the first rotation position P2 to the second rotation position P1, and two of the four limit switches 17 detect that the one fire extinguisher 11 has been removed. Then, the indicator light 59 lights up to indicate that the fire extinguisher 11 has been removed, and the fact that the fire extinguisher 11 has been removed is notified to a disaster prevention receiving board (not shown).

[0092] Of course, when the two fire extinguishers 11 are removed from the fire extinguisher installation section 15, the indicator light 59 also lights up to indicate that the fire extinguisher 11 has been removed, and the fact that the fire extinguisher 11 has been removed is notified to a disaster prevention receiving board (not shown).

[0093] In the fire extinguisher detection unit 1, when viewed in the horizontal direction, as shown in FIG. 16, at least a part of the limit switch 17 overlaps the installed fire extinguisher 11. When the fire extinguisher 11 is not installed in the fire extinguisher installation section 15, the moving body 19 is located at the first rotation position P1 with a biasing force. When the fire extinguisher 11 is installed in the fire extinguisher installation section 15, the fire extinguisher body 39 abuts against the fire extinguisher abutting portion 55. Due to this abutment, the moving body 19 is pushed by the fire extinguisher body 39 and is located at the second position P2, and the actuator 49 of the limit switch 17 is pushed by the limit switch abutting portion 57. Then, the limit switch 17 detects that the fire extinguisher 11 is installed in the fire extinguisher installation section 15.

[0094] As a result, it is possible to accurately detect that the fire extinguisher 11 is installed in the fire extinguisher installation part 15. Also, when viewed in the lateral direction, at least a part of the limit switch 17 overlaps the installed fire extinguisher 11. Thereby, compared with the mode shown in FIG. 21, the value of the dimension W5 (the value of the dimension in the depth direction) of the box body 13 in which the limit switch 17 and the moving body 19 are provided in the front-rear direction can be reduced.

[0095] Also, in the fire extinguisher detection unit 1, the moving body 19 moves between the first position P1 and the second position P2 by rotating only with respect to the box body 13 about the first axis C1 that is located in the vicinity of the back plate portion 23 and extends in the lateral direction. In the fire extinguisher detection unit 1, the lever portion 51 rotates with respect to the limit switch main body 47 about the second axis C2 that extends in the lateral direction. Also, in the fire extinguisher detection unit 1, the roller 53 rotates with respect to the lever portion 51 about the third axis C3 that extends in the lateral direction, and the roller 53 abuts on the limit switch contact portion 57 of the moving body 19.

[0096] Thereby, with a simple and reasonable configuration, malfunctions of the actuators 49 of the moving body 19 and the limit switch 17 are suppressed as much as possible, and it is possible to detect that the fire extinguisher 11 is installed in the fire extinguisher installation part 15 and that the fire extinguisher 11 has been removed from the fire extinguisher installation part 15. In the movement from the first position P1 to the second position P2, the movement of the roller 53 of the limit switch 17 that abuts on the limit switch contact portion 57 of the moving body 19 is configured such that the limit switch 17 operates when it is 4 mm or more and 15 mm or less when viewed from the lateral direction. Thereby, it is possible to surely detect that the fire extinguisher 11 is installed in the fire extinguisher installation part 15 and that the fire extinguisher 11 has been removed from the fire extinguisher installation part 15 without malfunctioning.

[0097] Also, in the fire extinguisher detection unit 1, the protruding direction of the operating lever 41 from the fire extinguisher main body 39 and the extending direction of the hose 43 are inclined, the hose 43 is located on the back plate portion side, and the operating lever 41 is located on the front plate portion side, so that the fire extinguisher 11 is installed in the fire extinguisher installation part 15.

[0098] This makes it possible to avoid interference between the hose 43 of the fire extinguisher 11 and the moving body 19, and facilitates the installation of the fire extinguisher 11 in the fire extinguisher installation section 15 and the removal of the fire extinguisher 11 from the fire extinguisher installation section 15. That is, the fire extinguisher 11 can be lifted by holding the operation lever 41 with the right hand, facilitating the transportation of the fire extinguisher 11. Also, when installing the fire extinguisher 11 in the fire extinguisher installation section 15, since the extending direction of the hose 43 facing the back plate portion 23 side (the side of the moving body 19) is inclined, interference between the hose 43 and the moving body 19 can be avoided.

[0099] Further, since the operation lever 41 and the hose 43 are inclined and protrude from the fire extinguisher body 39, the value of the dimension in the front-back direction of the fire extinguisher accommodation space can be reduced, and the value of the dimension W5 in the front-back direction of the box body 13 can be reduced.

[0100] Furthermore, the operation lever 41 is located on the right side of the fire extinguisher body 39 and the hose 43 is located on the left side of the fire extinguisher body 39. This makes it easier for right-handed people, who account for a large proportion, to remove the installed fire extinguisher 11 from the fire extinguisher installation section 15 and install the fire extinguisher 11 in the fire extinguisher installation section 15.

[0101] Note that in the fire extinguisher detection unit 1, the fire extinguisher 11 can be installed in the fire extinguisher installation section 15 in the reverse direction. Look at the state where the fire extinguisher 11 is installed in the fire extinguisher installation section 15 in the reverse direction from a position away from the front side of the box body 13 toward the back side. Then, the operation lever 41 is located on the left side of the fire extinguisher body 39, and the hose is located on the right side of the fire extinguisher body 39.

[0102] Also, in the fire extinguisher detection unit 1, the limit switch contact portion 57 of the moving body 19 and the portion in the vicinity of the limit switch contact portion 57 cover the actuator 49 of the limit switch 17. Thereby, the limit switch contact portion 57 and the portion in the vicinity of the limit switch contact portion 57 can serve as a rain shield or an umbrella. This can protect the limit switch 17 (especially the actuator 49 which is a movable part) from dust, water droplets, etc.

[0103] Further, in the fire extinguisher detection unit 1, as the limit switch 17, a first limit switch 17A for sending a signal to the disaster prevention receiving panel and a second limit switch 17B for turning on or off the indicator lamp 59 are provided.

[0104] Thus, even if a malfunction occurs in either the first limit switch 17A or the second limit switch 17B, it is possible to detect the installation of the fire extinguisher 11 in the fire extinguisher installation section 15 and the removal of the fire extinguisher 11 from the fire extinguisher installation section 15.

[0105] Further, in the fire extinguisher detection unit 1, the first limit switch 17A and the second limit switch 17B are arranged side by side in the front - back direction. Thereby, the space inside the box body 13 can be effectively utilized, and the value of the lateral dimension W7 of the box body 13 can be reduced.

[0106] Further, in the fire extinguisher detection unit 1, the moving body 19 is supported by the box body 13 via the frame 61, and the limit switch 17 is provided on the box body 13 via the frame 61. Further, a notch 69 is provided on the upper plate portion 65 of the frame 61 to avoid interference between the fire extinguisher body 39 and the hose 43 of the fire extinguisher 11 installed in the fire extinguisher installation section 15.

[0107] Thus, even though the frame 61 is provided, the fire extinguisher 11 with the hose 43 extending from the fire extinguisher body 39 can be installed in the fire extinguisher installation section 15 while avoiding interference with the frame 61.

[0108] Further, in the fire extinguisher detection unit 1, the limit switches 17A and 17B are arranged in series side by side in the front - back direction, installed on the side plate portion 67 of the frame 61 and brought close to the end of the frame 61. Thereby, interference between the fire extinguisher 11 and the limit switch 17 can be avoided when the fire extinguisher 11 is installed or removed.

[0109] Note that the above - described fire extinguisher detection unit 1 may be understood as the following fire extinguisher detection unit.

[0110] That is, it is installed inside a box body configured to include a back plate portion, a side plate portion, and a top plate portion, and having a fire extinguisher installation portion where a fire extinguisher is installed inside. It may be understood as a fire extinguisher detection unit having a frame configured to include a back plate portion different from the back plate portion of the box body, a top plate portion different from the top plate portion of the box body, and a side plate portion different from the side plate portion of the box body, a limit switch provided on the side plate portion of the frame inside the frame, and provided inside the frame near the back plate portion of the frame, and configured to include a fire extinguisher contact portion that contacts the fire extinguisher body and a limit switch contact portion that contacts the actuator of the limit switch, and a moving body that moves between a first position and a second position with respect to the frame by being supported by the frame.

[0111] In this fire extinguisher detection unit, when the fire extinguisher is not installed in the fire extinguisher installation portion, the moving body is located at the first position with an urging force. When the fire extinguisher is installed in the fire extinguisher installation portion, the fire extinguisher body contacts the fire extinguisher contact portion, and thus is pushed by the fire extinguisher body to be located at the second position, and the actuator of the limit switch is pushed by the limit switch contact portion, and the limit switch is configured to detect that the fire extinguisher has been installed in the fire extinguisher installation portion. A notch is provided on the top plate portion of the frame to avoid interference between the fire extinguisher body and the hose of the fire extinguisher installed in the fire extinguisher installation portion.

[0112] The above describes the present embodiment, but the present embodiment is not limited thereto, and various modifications are possible within the scope of the gist of the present embodiment. For example, the frame 61 may be deleted, and the limit switch 17, the moving body 19, etc. may be directly provided on the box body 13.

Description of Reference Numerals

[0113] 1 Fire extinguisher detection unit 11 Fire extinguisher 13 Box body 15 Fire extinguisher installation portion 17 Limit switch 17A First limit switch 17B Second limit switch 19 Moving body 23 Rear plate part 25 Side plate part 27 Upper plate part 39 Fire extinguisher body 47 Limit switch body 49 Actuator 51 Lever part 53 Roller 55 Fire extinguisher contact part 57 Limit switch contact part 59 Display part 61 Frame 65 Upper plate part 67 Side plate part 69 Notch C1 First axis C2 Second axis C3 Third axis P1 First position (first rotation position) P2 Second position (second rotation position)

Claims

Claim 1 a box body configured to include a back plate portion, a side plate portion, and an upper plate portion; a fire extinguisher installation portion provided in the box body for installing a fire extinguisher; a limit switch provided in the box body and overlapping at least a part of a fire extinguisher body of the fire extinguisher installed in the fire extinguisher installation portion when viewed in the thickness direction of the side plate portion; a moving body provided in the box body near the back plate portion, including a fire extinguisher contact portion that contacts the fire extinguisher body and a limit switch contact portion that contacts an actuator of the limit switch, and configured to move between a first position and a second position with respect to the box body by being supported by the box body; having; when the fire extinguisher is not installed in the fire extinguisher installation portion, the moving body is located at the first position with a biasing force, and when the fire extinguisher is installed in the fire extinguisher installation portion, the fire extinguisher body contacts the fire extinguisher contact portion and is pushed by the fire extinguisher body to be located at the second position, and the limit switch contact portion pushes the actuator of the limit switch, and the limit switch is configured to detect whether the fire extinguisher is installed in the fire extinguisher installation portion. A fire extinguisher detection unit. Claim 2 The moving body rotates with respect to the box body about a first axis extending in a lateral direction that is perpendicular to the thickness direction of the side plate portion, so as to move between the first position and the second position. The limit switch is a roller lever type limit switch, and this roller lever type limit switch includes a limit switch body supported by the box body and containing an internal switch, a lever portion protruding from the limit switch body, and a roller provided at a tip portion of the lever portion. The lever portion rotates with respect to the limit switch body about a second axis extending in the lateral direction at a base end portion thereof, and the roller rotates with respect to the lever portion about a third axis extending in the lateral direction at a tip end portion of the lever portion. The fire extinguisher detection unit according to claim 1, wherein the roller contacts a limit switch contact portion of the moving body and the lever portion is pushed and rotated. Claim 3 The protruding direction of the operating lever from the fire extinguisher body and the extending direction of the hose from the fire extinguisher body are oblique with respect to the thickness direction of the back plate portion, and moreover, the hose is located on the side of the back plate portion and the operating lever is located on the side opposite to the back plate portion, and the fire extinguisher is configured to be installed in the fire extinguisher installation portion. The fire extinguisher detection unit according to claim 1.

4. The fire extinguisher detection unit according to claim 1, wherein the limit switch contact portion of the moving body covers the limit switch.

5. As the limit switch, a first limit switch for sending a signal indicating whether or not the fire extinguisher is installed in the fire extinguisher installation portion to the disaster prevention receiving board and a second limit switch for changing the display on the display unit according to whether or not the fire extinguisher is installed in the fire extinguisher installation portion are provided. The fire extinguisher detection unit according to claim 1, wherein the first limit switch and the second limit switch are provided in the front-rear direction which is the thickness direction of the back plate portion.

6. A frame configured to include an upper plate portion different from the upper plate portion of the box body and a side plate portion different from the side plate portion of the box body and installed in the box body inside the box body. The moving body is supported by the box body via the frame, and the limit switch is provided on the box body via the frame. The fire extinguisher detection unit according to any one of claims 1 to 5, wherein a notch for avoiding interference between the fire extinguisher body and the hose of the fire extinguisher installed in the fire extinguisher installation portion is provided on the upper plate portion of the frame.

7. Installed inside a box body configured to include a back plate portion, a side plate portion, and an upper plate portion and having a fire extinguisher installation portion inside which a fire extinguisher is installed. The box body includes an upper plate portion different from the upper plate portion of the box body and a side plate portion different from the side plate portion of the box body. A frame configured to include, A limit switch provided on the side plate portion of the frame inside the frame. A moving body configured to include a fire extinguisher contact portion provided in the vicinity of the back plate portion of the frame inside the frame and contacting the fire extinguisher body and a limit switch contact portion contacting the actuator of the limit switch, and moving between a first position and a second position with respect to the frame by being supported by the frame. having When the fire extinguisher is not installed in the fire extinguisher installation part, the moving body is located at the first position with a biasing force. When the fire extinguisher is installed in the fire extinguisher installation part, the fire extinguisher body abuts against the fire extinguisher abutting part and is pushed by the fire extinguisher body to be located at the second position, and the actuator of the limit switch is pushed by the limit switch abutting part, and the limit switch is configured to detect that the fire extinguisher has been installed in the fire extinguisher installation part. A fire extinguisher detection unit provided with a notch for avoiding interference between the fire extinguisher body and the hose of the fire extinguisher installed in the fire extinguisher installation part on the upper plate part of the frame.

Images