Fire alarm system

Abstract

To provide a fire alarm system that can improve the work efficiency when installing district name forms. [Solution] The fire alarm receiver 100 is a fire alarm receiver equipped with a display unit (area display unit 15) that displays the location of an abnormality. The display unit (area display unit 15) comprises a main body 20, an area name sheet 90 on which the area name is written and placed on the surface of the main body 20, and an area window cover 30 attached to the main body so as to overlap the area name sheet 90 and having light-transmitting properties in at least the portion that overlaps the area name. Multiple area window covers 30 are provided, and each of the multiple area window covers 30 has a portion that overlaps the area name and a portion that does not overlap the area name, and at least the portion that does not overlap the area name has a different color depending on whether the overlapping area name indicates the location of a fire or whether the overlapping area name indicates the location of an abnormality other than a fire.

Description

Technical Field

[0001] This disclosure relates to fire alarm equipment.

Background Art

[0002] There is known fire alarm equipment that receives information from a plurality of fire detectors and a plurality of fire transmitters installed for each warning area. The fire alarm equipment operates based on the information received from the fire detectors and the fire transmitters. The fire alarm equipment includes a display unit having a plurality of zone windows. Each zone window displays an abnormality for each warning area. For example, Patent Document 1 and Patent Document 2 describe an example of a display panel having a plurality of zone windows. As described in Patent Document 1 and Patent Document 2, a paper (zone name paper) on which the name of the monitored area is written is attached to each zone window. The zone name paper is fixed to the zone window by a transparent cover. The zone name paper and the transparent cover are arranged to correspond one-to-one.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when installing or replacing the zone name paper, etc., the number of attachment operations for the zone name paper and the transparent cover increases in proportion to the number of zone windows. Therefore, it may take time for the attachment work of the zone name paper.

[0005] This disclosure has been made in view of the above problems, and an object thereof is to provide a fire alarm equipment capable of improving the working efficiency when installing the zone name paper. [Means for solving the problem]

[0006] To achieve the above objective, the fire alarm system of this disclosure is a fire alarm system equipped with a display unit for indicating the location of an abnormality, wherein the display unit comprises a main body, a district name sheet on which a district name is written and placed on the surface of the main body, and a district window cover attached to the main body so as to overlap the district name sheet and having light-transmitting properties in at least the portion that overlaps the district name, wherein a plurality of district window covers are provided, each having a portion that overlaps the district name and a portion that does not overlap the district name, wherein at least the portion that does not overlap the district name is a different color depending on whether the overlapping district name indicates the location of a fire or whether the overlapping district name indicates the location of an abnormality other than a fire.

[0007] This makes it possible to change the color of the district window displaying the district name depending on the type of anomaly that has occurred. Furthermore, by coloring the district window cover instead of the district name sheet, color fading over time can be reduced. In addition, compared to printing the color on the district name sheet, variations in how people perceive the color can be reduced (making it easier to maintain color universal design).

[0008] A fire alarm system in another aspect of the present disclosure is a fire alarm system comprising a display unit for indicating the location of an abnormality, wherein the display unit comprises a main body, a district name sheet on which a district name is inscribed and placed on the surface of the main body, and a district window cover attached to the main body so as to overlap the district name sheet and having light-transmitting properties in at least the portion overlapping the district name, wherein a plurality of district window covers are provided, each having a portion that overlaps the district name and a portion that does not overlap the district name, and at least one of the portions that overlap the district name and the portion that does not overlap the district name is a different color depending on whether the overlapping district name indicates the location of a fire or whether the overlapping district name indicates the location of an abnormality other than a fire.

[0009] This makes it possible to change the color of the district window displaying the district name depending on the type of anomaly that has occurred. Furthermore, by coloring the district window cover instead of the district name sheet, color fading over time can be reduced. In addition, compared to printing the color on the district name sheet, variations in how people perceive the color can be reduced (making it easier to maintain color universal design).

[0010] Another embodiment of the fire alarm system of the present disclosure is a fire alarm system comprising a display unit for indicating the location of an abnormality, wherein the display unit comprises a main body, a district name sheet on which a district name is inscribed and placed on the surface of the main body, and a district window cover attached to the main body so as to overlap the district name sheet and having light-transmitting properties in at least the portion overlapping the district name, wherein the display unit comprises a plurality of district window covers, each having a portion that overlaps the district name and a portion that does not overlap the district name, and each of the plurality of district window covers has at least one different color depending on whether the overlapping district name indicates the location of a fire or whether the overlapping district name indicates the location of an abnormality other than a fire.

[0011] This makes it possible to change the color of the district window displaying the district name depending on the type of anomaly that has occurred. Furthermore, by coloring the district window cover instead of the district name sheet, color fading over time can be reduced. In addition, compared to printing the color on the district name sheet, variations in how people perceive the color can be reduced (making it easier to maintain color universal design). [Effects of the Invention]

[0012] The fire alarm system described herein can improve work efficiency when installing district name labels. [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a front view of the fire alarm receiver according to this embodiment. [Figure 2]Figure 2 is a left side view of the fire receiver of the present embodiment. [Figure 3] Figure 3 is a perspective view of the roller and the receiving member of the housing of the present embodiment. [Figure 4] Figure 4 is a front view of the district window panel of the present embodiment. [Figure 5] Figure 5 is a front view of the district window panel of the present embodiment with the top cover removed. [Figure 6] Figure 12 is a front view of the district window panel of the present embodiment with the top cover and the district window cover removed. [Figure 7] Figure 7 is a perspective view of the main body of the district window panel of the present embodiment. [Figure 8] Figure 8 is an enlarged perspective view of the periphery of the first holding claw and the second holding claw in Figure 7. [Figure 9] Figure 9 is a perspective view of the first holding claw of the present embodiment. [Figure 10] Figure 10 is a perspective view of the second holding claw of the present embodiment. [Figure 11] Figure 11 is a front view of the district window cover of the present embodiment. [Figure 12] Figure 12 is an enlarged view of the district window cover of the present embodiment. [Figure 13] Figure 13 is an enlarged view of the district window cover of the present embodiment in a state attached to the main body. [Figure 14] Figure 14 is a front view showing an example of the state where the district window cover of the present embodiment is divided. [Figure 15] Figure 15 is a front view of the top cover of the present embodiment. [Figure 16] Figure 16 is a schematic diagram showing the working process when attaching the district name paper of the present embodiment to the main body. [Figure 17] Figure 17 is a schematic diagram showing the working process when attaching the district name paper of the present embodiment to the main body. [Figure 18] Figure 18 is a schematic diagram showing the working process when attaching the district name paper of the present embodiment to the main body. [Modes for carrying out the invention]

[0014] The present invention will now be described in detail with reference to the drawings. However, the present invention is not limited to the embodiments described below. Furthermore, the components in the embodiments below include those easily conceivable by those skilled in the art, those that are substantially identical, and those that fall within the so-called equivalent range. Moreover, the components disclosed in the embodiments below can be combined as appropriate.

[0015] (Embodiment) In this embodiment, the case where the fire alarm system is a fire alarm receiver is described as an example. Figure 1 is a front view of the fire alarm receiver of this embodiment. The fire alarm receiver 100 of this embodiment is a so-called P-type receiver in which a detector circuit is drawn out for each protected area and the location of the fire is identified for each protected area. The fire alarm receiver 100 of this embodiment receives signals from multiple fire detectors and multiple fire alarm transmitters installed in each protected area. The fire alarm receiver 100 operates based on the signals received from the fire detectors and fire alarm transmitters. Specifically, the fire alarm receiver 100 displays information identifying the protected area where the fire was detected and sounds an alarm based on the detection of a fire by a fire detector or a short circuit in the detector circuit due to the operation of a fire alarm transmitter. The fire alarm receiver 100 is connected to multiple fire detectors and multiple fire alarm transmitters installed in one protected area via a common detector circuit. As shown in Figure 1, the fire alarm receiver 100 comprises a housing 10 and a display panel 14.

[0016] Figure 2 is a left side view of the fire alarm receiver of this embodiment. Figure 3 is a perspective view of the roller and support member of the housing of this embodiment. As shown in Figures 2 and 3, the housing 10 comprises a main body 11, a door 13, a support member 101, a roller support member 103, a roller 105, and a lock 107.

[0017] In the following explanation, the XYZ Cartesian coordinate system is used. The X-axis is parallel to the left-right direction (horizontal direction) when viewing the enclosure 10 from the front. The Y-axis is parallel to the up-down direction (vertical direction) when viewing the enclosure 10 from the front. The Z-axis is perpendicular to both the horizontal and vertical directions (depth direction). In the X direction, the right side when viewing the enclosure 10 from the front is defined as the +X direction, and the left side as the -X direction. In the Y direction, the top side when viewing the enclosure 10 from the front is defined as the +Y direction, and the bottom side as the -Y direction. In the Z direction, the direction from the door 13 toward the main body 11 is defined as the +Z direction, and the direction from the main body 11 toward the door 13 is defined as the -Z direction.

[0018] The main body 11 is roughly rectangular in shape. The main body 11 contains a receiving unit and the like for receiving signals from fire detectors and fire alarms. The door 13 is positioned to close the opening of the main body 11. The door 13 is openable and closable relative to the main body 11. The door 13 is supported by the main body 11 via hinges. The hinges are located at the +X end of the main body 11 and the door 13. The door 13 can rotate around the hinge's axis of rotation (an axis of rotation parallel to the Y direction).

[0019] As shown in Figure 3, the receiving member 101 is provided on the inner edge of the main body 11. The receiving member 101 is positioned at the end of the main body 11 opposite to the hinge supporting the door 13 (the end in the -X direction). The receiving member 101 is positioned approximately in the center in the Y direction at the -X direction end of the main body 11. The receiving member 101 comprises a side plate 101a, a front plate 101b, a top plate 101c, and an inclined plate 101d. The side plate 101a is a plate-shaped member whose thickness direction is parallel to the X direction. The side plate 101a is fixed to the main body 11. The front plate 101b is a plate-shaped member whose thickness direction is parallel to the Z direction. The front plate 101b is connected to the side plate 101a. The top plate 101c is a plate-shaped member whose thickness direction is parallel to the Y direction. The top plate 101c is connected to the front plate 101b. The inclined plate 101d is a plate-shaped member that extends from the front plate 101b in the +X and -Z directions. The inclined plate 101d is connected to the front plate 101b.

[0020] The roller support member 103 is provided on the inner edge of the door 13. The roller support member 103 is located at the end of the door 13 opposite to the hinge that supports the door 13 (the end in the -X direction). The roller support member 103 is located approximately in the center in the Y direction at the -X direction end of the door 13. The roller support member 103 is, for example, a plate-shaped member whose thickness direction is parallel to the X direction.

[0021] The roller 105 is attached to the roller support member 103. The roller 105 can rotate about an axis parallel to the X direction. When the door 13 is open, the -X end of the door 13 moves (shifts) in the -Y direction due to its own weight compared to when it is closed. A part of the roller 105 is positioned in the -Y direction relative to the upper plate 101c of the receiving member 101 when the door 13 is open. When the door 13 is closed, the roller 105 rides up onto the upper plate 101c. This lifts the -X end of the door 13 in the +Y direction. As a result, relative positional displacement between the main body 11 and the door 13 is suppressed when the door 13 is closed.

[0022] The lock 107 is provided on the door 13. The lock 107 is a so-called coin lock that can be operated with, for example, a screwdriver or a coin. The lock 107 has a plate-shaped movable plate whose thickness direction is parallel to the Z direction. The movable plate can rotate about an axis parallel to the Z direction. When the movable plate is rotated with the door 13 closed, the movable plate is inserted into the front plate 101b of the receiving member 101 in the +Z direction. As a result, the opening and closing of the door 13 is restricted by the movable plate catching on the front plate 101b. In other words, the door 13 is locked by operating the lock 107. In this way, the receiving member 101 serves as both the mating member for the roller 105 and the mating member for the lock 107.

[0023] As shown in Figure 1, the display panel 14 displays various information in response to signals received from fire detectors and fire alarms. The display panel 14 includes a district display unit 15, a type display unit 16, and an operation display unit 17. The district display unit 15 indicates which district has experienced an abnormality based on signals received from fire detectors and fire alarms. The district display unit 15 includes at least one district window panel 19. In this embodiment, the district display unit 15 includes two district window panels 19. Each district window panel 19 includes a plurality of district windows 191 and a plurality of indicator lights 193. The district windows 191 and indicator lights 193 correspond one-to-one. In this embodiment, one district window panel 19 is provided with 20 district windows 191 and 20 indicator lights 193. When a signal is received from a fire detector or fire alarm, the indicator light 193 corresponding to the district window 191 corresponding to the district where the abnormality occurred lights up. The type display unit 16 displays the type of abnormality that occurred in the area. The type display unit 16 is located below the area display unit 15. The operation display unit 17 displays the operations to be performed depending on the situation. The operation display unit 17 is located below the type display unit 16.

[0024] Figure 4 is a front view of the district window panel of this embodiment. Figure 5 is a front view of the district window panel of this embodiment with the top cover removed. Figure 6 is a front view of the district window panel of this embodiment with both the top cover and the district window cover removed. Figure 7 is a perspective view of the main body of the district window panel of this embodiment. Figure 8 is an enlarged perspective view of the area around the first retaining claw and the second retaining claw of Figure 7. Figure 9 is a perspective view of the first retaining claw of this embodiment. Figure 10 is a perspective view of the second retaining claw of this embodiment. Figure 11 is a front view of the district window cover of this embodiment. Figure 12 is an enlarged view of the district window cover of this embodiment. Figure 13 is an enlarged view of the district window cover of this embodiment when attached to the main body. Figure 14 is a front view showing an example of the district window cover of this embodiment in a divided state. Figure 15 is a front view of the top cover of this embodiment.

[0025] As shown in Figures 4 to 6, the district window panel 19 comprises a main body 20, multiple district name sheets 90 (see Figure 6), multiple district window covers 30 (see Figure 5), and a top cover 50 (see Figure 4).

[0026] The main body 20 is a component that supports the district name paper 90, the district window cover 30, and the top cover 50. The main body 20 is attached to the door 13. The material of the main body 20 is, for example, ABS (Acrylonitrile Butadiene Styrene) resin. As shown in Figure 6, the main body 20 comprises a base 21, a plurality of recesses 22, a plurality of first retaining claws 23, a plurality of second retaining claws 24, a plurality of round holes 25, a first fitting portion 26, a second fitting portion 27, a plurality of upper claws 28, and a plurality of lower claws 29.

[0027] As shown in Figure 6, the base portion 21 is formed in a plate shape. The base portion 21 is rectangular when viewed from the Z direction. The multiple recesses 22 are depressions provided on the surface of the base portion 21 in the -Z direction. The depth D22 (length in the Z direction, see Figure 8) of the recesses 22 is preferably 0.4 mm or more. The multiple recesses 22 are arranged side by side in the X direction. Five recesses 22 are provided on one base portion 21.

[0028] The first retaining claw 23 is a member that holds the district window cover 30. The first retaining claw 23 is positioned at a location corresponding to each of the multiple district names arranged in the X direction. As shown in Figure 9, the first retaining claw 23 is a projection that protrudes from the surface of the base 21 in the -Z direction. The first retaining claw 23 is formed in a substantially L shape when viewed from the Y direction. The first retaining claw 23 is open toward the +X direction. The first retaining claw 23 is provided with a chamfer 231. The chamfer 231 is provided at the corner that is both the end in the +X direction and the end in the -Z direction. It can also be said that the chamfer 231 is provided at the corner of the end opposite to the sliding direction of the district window cover 30 (or top cover 50) when attaching the district window cover 30 (or top cover 50) to the main body 20.

[0029] The second retaining claw 24 is a member that holds the district window cover 30 at a different position from the first retaining claw 23 in the X direction. The second retaining claw 24 is positioned at a position corresponding to each of the multiple district names arranged in the X direction. The second retaining claw 24 is positioned on the opposite side from the first retaining claw 23, with the district name paper 90 in between. As shown in Figure 10, the second retaining claw 24 is a projection that protrudes from the surface of the base 21 in the -Z direction. The second retaining claw 24 is formed in a substantially L shape when viewed from the Y direction. The second retaining claw 24 is open toward the -X direction. The second retaining claw 24 is provided with a chamfer 241 and a chamfer 243. The chamfer 241 is provided at the corner that is both the end in the +X direction and the end in the -Z direction. It can also be said that the chamfer 241 is provided at the corner of the end opposite to the sliding direction of the district window cover 30 (or top cover 50) when attaching the district window cover 30 (or top cover 50) to the main body 20. The chamfer 243 is provided at the corner that is both the end in the -X direction and the end in the +Z direction. It can also be said that the chamfer 243 is provided at the corner facing the district name form 90.

[0030] The circular holes 25 are the holes where the lamps are placed. The circular holes 25 are positioned adjacent to each district name listed on the district name sheet 90. There is a one-to-one correspondence between the circular holes 25 and the district names. The circular holes 25 are positioned in the -X direction of the corresponding district name. Multiple circular holes 25 are positioned at equal intervals in the X and Y directions.

[0031] The first fitting portion 26 is a hole provided in the base portion 21 for holding the top cover 50. As shown in Figure 6, in this embodiment, one base portion 21 is provided with one first fitting portion 26. The first fitting portion 26 is located in the base portion 21 in the -X direction and intermediate in the Y direction from the plurality of recesses 22. The first fitting portion 26 holds the -X end of the top cover 50.

[0032] The second fitting portion 27 is a hole provided in the base portion 21 for holding the top cover 50. As shown in Figure 6, in this embodiment, one base portion 21 is provided with two second fitting portions 27. The second fitting portions 27 are positioned in the +X direction relative to the plurality of recesses 22 in the base portion 21. The two second fitting portions 27 are positioned side by side along the Y direction. The Y-direction positions of the two second fitting portions 27 are different from the Y-direction positions of the first fitting portion 26. The second fitting portions 27 hold the -X end of the top cover 50.

[0033] The multiple upper claws 28 are members that hold the top cover 50. The upper claws 28 are projections that protrude from the surface of the base 21 in the -Z direction. The upper claws 28 are formed in a substantially L shape when viewed from the X direction. The upper claws 28 are positioned in the +Y direction relative to the multiple recesses 22 on the base 21. The upper claws 28 are open toward the -Y direction.

[0034] The multiple lower claws 29 are members that hold the top cover 50. The lower claws 29 are projections that protrude from the surface of the base 21 in the -Z direction. The lower claws 29 are formed in a substantially L shape when viewed from the X direction. The lower claws 29 are positioned in the -Y direction relative to the multiple recesses 22 on the base 21. The lower claws 29 are open toward the +Y direction.

[0035] As shown in Figure 6, the district name sheet 90 is a sheet on which multiple district names are listed in the Y direction. In this embodiment, four district names are listed on one district name sheet 90. On the district name sheet 90, the district names are listed along the X direction. The district names are printed by a printer using a predetermined program. For example, 60 district names are printed on an A4 sheet of paper. One district name sheet 90 is manufactured by cutting the A4 sheet with the district names printed on it to a predetermined size.

[0036] The district name paper 90 is placed on the surface of the main body 20. More specifically, the district name paper 90 is placed in the recess 22 of the main body 20. The thickness of the district name paper 90 is less than the depth D22 of the recess 22 (see Figure 8). The entire district name paper 90 is housed in the recess 22. In the district window panel 19, multiple district name papers 90 are arranged in a line in the X direction. There is a one-to-one correspondence between the district name paper 90 and the recess 22. Five district name papers 90 are attached to one main body 20. The five district name papers 90 are arranged at equal intervals in the X direction.

[0037] As shown in Figure 5, the district window cover 30 is attached to the main body 20 so as to overlap the district name sheet 90. The -X end of the district window cover 30 is held by the first retaining claw 23. The +X end of the district window cover 30 is held by the second retaining claw 24. The district window cover 30 is detachable from the main body 20. The district window cover 30 is translucent. Therefore, the district name written on the district name sheet 90 is visible through the district window cover 30. The material of the district window cover 30 is, for example, polyethylene terephthalate (PET), polyvinyl chloride, or polycarbonate (PC).

[0038] The district window cover 30 overlaps multiple district name sheets 90 arranged in the X direction. In this embodiment, the district window cover 30 overlaps all district name sheets 90 (five district name sheets 90) in the same row. In the district window panel 19, multiple district window covers 30 are arranged in the Y direction. Four district window covers 30 are attached to one main body 20. The four district window covers 30 are arranged at equal intervals in the Y direction.

[0039] As shown in Figure 5, multiple district window covers 30 include end covers 49. The end cover 49 is a district window cover 30 that overlaps with a district name located at the +Y direction end of one district name sheet 90. In one district window panel 19, the end cover 49 overlaps with five district names located at the +Y direction end of the 20 district names.

[0040] As shown in Figure 5, the multiple district window covers 30 include a first cover 41 and a second cover 42. The first cover 41 is a district window cover 30 that overlaps with and is colored with the district name indicating the location of the fire. In this embodiment, the first cover 41 is, for example, uncolored and transparent.

[0041] The second cover 42 is colored such that it overlaps with the district name indicating the location of an abnormality other than a fire and is a different color from the first cover 41. In this embodiment, the second cover 42 is, for example, colored and translucent. Locations of abnormalities other than fires include locations where smoke control equipment is activated, locations where gas leaks occur, locations where alarm devices are activated, etc. When the second cover 42 overlaps with the district name indicating the location where smoke control equipment is activated, it is colored, for example, yellow. When the second cover 42 overlaps with the district name indicating the location where gas leaks occur, it is colored, for example, blue. When the second cover 42 overlaps with the district name indicating the location where an alarm device is activated (location of the equipment from which a transfer signal was transmitted from the fire receiver 100), it is colored, for example, orange.

[0042] As shown in Figure 11, the district window cover 30 comprises a plurality of covering portions 31, a plurality of connecting portions 33, end projections 35, end recesses 37, a plurality of intermediate recesses 38, and a plurality of perforations 39. The covering portion 31 is the portion that overlaps with the district name paper 90. The district window cover 30 comprises five covering portions 31. The connecting portion 33 connects two covering portions 31. The width of the connecting portion 33 in the Y direction is smaller than the width of the covering portion 31 in the Y direction. The end projection 35 is a projection that protrudes in the -X direction from the covering portion 31 at the end in the -X direction. The end projection 35 fits into the first retaining claw 23 of the main body 20. The end recess 37 is a notch provided at the end in the +X direction of the covering portion 31 at the end in the +X direction. The end recess 37 opens toward the +X direction. The intermediate recess 38 is a hole located at the end of the covering portion 31 in the +X direction. The second retaining claw 24 fits into the end recess 37 and the intermediate recess 38. In the following description, when it is not necessary to distinguish between the end recess 37 and the intermediate recess 38, they will be referred to as claw fitting recesses.

[0043] As shown in Figure 12, a fitting confirmation indicator 36 is provided in the claw fitting recess. The fitting confirmation indicator 36 is a print that is distinguishable from other parts and is provided around the claw fitting recess. The fitting confirmation indicator 36 is exposed when the second retaining claw 24 is not fitted into the claw fitting recess. As shown in Figure 13, when the second retaining claw 24 is fitted into the claw fitting recess, at least a part of the fitting confirmation indicator 36 corresponding to the claw fitting recess is not exposed. Even when the second retaining claw 24 is fitted into the claw fitting recess, it is preferable that at least a part of the fitting confirmation indicator 36 is exposed in order to facilitate confirmation of the fitting confirmation indicator 36.

[0044] The perforations 39 are straight lines extending in the Y direction. The perforations 39 are located at the +X direction end of the covering portion 31, excluding the covering portion 31 at the X direction end. The district window cover 30 has three perforations 39. The perforations 39 are located on both sides of the intermediate recess 38 in the Y direction. As shown in Figure 14, the district window cover 30 can be divided in the X direction by the perforations 39. A portion of the divided district window cover 30 can be attached to the main body 20. Specifically, the district window cover 30 is divided into a first district window cover piece 301 and a second district window cover piece 302 by the perforations 39. The first district window cover piece 301 can be attached to the main body 20 at any position by a pair of first retaining claws 23 and second retaining claws 24. For example, the first district window cover piece 301 can be attached to the first retaining claw 23 located furthest to the -X direction and the second retaining claw 24 located midway in the X direction, or it can be attached to the first retaining claw 23 located midway in the X direction and the second retaining claw 24 located furthest to the +X direction. The second district window cover piece 302 is discarded.

[0045] As shown in Figure 15, the top cover 50 is attached to the main body 20 so as to overlap the district window covers 30. The top cover 50 overlaps all of the district window covers 30 (four district window covers 30) attached to one main body 20. The -X end of the top cover 50 is held in the first fitting portion 26. The +X end of the top cover 50 is held in the second fitting portion 27. The top cover 50 is detachable from the main body 20. The material of the top cover 50 is, for example, polycarbonate (PC).

[0046] The top cover 50 comprises a plurality of translucent sections 51, a lamp window 55, a shielding section 53, a first projection 56, and a second projection 57. The translucent sections 51 are light-transmitting and overlap with the district name. Therefore, the district name written on the district name sheet 90 is visible through the district window cover 30 and the translucent sections 51. For example, the translucent sections 51 are uncolored and transparent. The length W51 of the translucent section 51 in the X direction is smaller than the length W90 (see Figure 6) of the district name sheet 90 in the X direction. The length H51 of the translucent section 51 in the Y direction is smaller than the length H30 (see Figure 11) of the district window cover 30 in the Y direction. The plurality of translucent sections 51 are arranged at equal intervals in the X and Y directions. The lamp window 55 is light-transmitting and overlaps with the lamp placed in the round hole 25 of the main body 20. For example, the lamp window 55 is uncolored and transparent. Multiple lamp windows 55 are arranged at equal intervals in the X and Y directions.

[0047] The shielding portion 53 has a lower transmittance than the transmittance of the transparent portion 51 and the lamp window 55. The portions of the main body 20, the district name paper 90, and the district window cover 30 that overlap with the shielding portion 53 are difficult to see or not visible at all. The shielding portion 53 is positioned at least between adjacent transparent portions 51. The shielding portion 53 is positioned around the transparent portion 51 and around the lamp window 55. In this embodiment, all portions other than the transparent portion 51 and the lamp window 55 are the shielding portion 53.

[0048] The first projection 56 is a projection that protrudes from the -X end of the shielding portion 53. The first projection 56 fits into the first fitting portion 26 of the main body 20. The second projection 57 is a projection that protrudes from the +X end of the shielding portion 53. The second projection 57 fits into the second fitting portion 27 of the main body 20. In addition, the +Y end of the shielding portion 53 catches on the upper claw 28 of the main body 20. The -Y end of the shielding portion 53 catches on the lower claw 29 of the main body 20. This prevents the top cover 50 from falling off the main body 20.

[0049] Figures 16 to 18 are schematic diagrams showing the work process when attaching the district name sheet of this embodiment to the main body. In Figures 16 to 18, hatching is added to the district window cover 30 for clarity. When attaching the district name sheet 90 to the main body, as shown in Figure 16, first the district window covers 30, excluding the end cover 49, are attached to the main body 20. That is, three of the four district window covers 30 in the -Y direction are attached to the main body 20. The district window cover 30 is slid in the -X direction. The end projection 35 is inserted into the back of the first retaining claw 23 at the end in the -X direction. Multiple second retaining claws 24 fit into the intermediate recess 38. After that, the district window cover 30 is slid slightly in the +X direction. As a result, the district window cover 30 is caught on both the first retaining claw 23 and the second retaining claw 24. With the three district window covers 30 attached, the district name paper 90 is inserted between the main body 20 and the district window covers 30. The district name paper 90 is stored in the recess 22 of the main body 20.

[0050] Next, as shown in Figure 17, the end cover 49 is attached to the main body 20. The end cover 49 is attached to the main body 20 by sliding it in the -X direction, similar to the other district window covers 30. This ensures that all the district names written on the district name sheet 90 are superimposed on the district window covers 30. In addition, the four district window covers 30 prevent the district name sheet 90 from falling out.

[0051] Next, as shown in Figure 18, the top cover 50 is attached to the main body 20. The top cover 50 is slid in the -X direction. The top cover 50 is slid in the -X direction at a position in the +Z direction relative to the upper claws 28 and lower claws 29 of the main body 20. This causes the top cover 50 to catch on the upper claws 28 and lower claws 29. The first projection 56 is inserted into the first fitting portion 26. Then, by bending the top cover 50, the second projection 57 is moved in the -X direction. The second projection 57 is inserted into the second fitting portion 27. This results in the state shown in Figure 4.

[0052] The fire alarm receiver 100 does not necessarily have to be equipped with a display panel 14 as shown in Figure 1. The type of fire alarm receiver 100 is not particularly limited. The materials of each component of the fire alarm receiver 100 do not necessarily have to be those described above. For example, the material of the main body 20 is not limited to ABS resin, but may be other plastics, for example. The material of the zone window cover 30 is not limited to polyethylene terephthalate (PET), polyvinyl chloride, or polycarbonate (PC), but may be other light-transmitting plastics. The material of the top cover 50 is not limited to polycarbonate (PC), but may be other light-transmitting plastics. Regarding the zone window cover 30, the first cover 41 may be colored and the second cover 42 may be uncolored.

[0053] It should be noted that fire alarm systems are not limited to fire alarm receivers. Display panels connected to fire alarm receivers that show the area where a fire has occurred based on signals from the fire alarm receivers are also included in fire alarm systems.

[0054] The district names do not necessarily have to be arranged in a row of four in the Y direction on a single district window panel 19. At least two district names are required to be arranged in the Y direction. Furthermore, the district names do not necessarily have to be arranged in a row of five in the X direction on a single district window panel 19. The number of district names arranged in the X direction may be one or multiple. Also, the number of district window panels 19 provided by a single district display unit 15 does not necessarily have to be two; it may be one or three or more.

[0055] As described above, the fire alarm receiver 100 of this embodiment is a fire alarm receiver equipped with a display unit (area display unit 15) that displays the location of an abnormality. The display unit comprises a main body 20, an area name sheet 90 on which multiple area names are arranged vertically (Y direction) and placed on the surface of the main body 20, and a plurality of area window covers 30 that are attached to the main body 20 so as to overlap the area name sheet 90 and are translucent.

[0056] This makes it possible to place multiple district names on a single district name sheet 90 at once. As a result, the number of times the district name sheets 90 need to be attached is reduced. Also, because multiple district names are listed side by side in the vertical direction (Y direction), the district name sheet 90 becomes larger. As a result, unintended movement of the district name sheet 90 due to static electricity when attaching the district window cover 30 to the main unit 20 is suppressed. Therefore, the fire alarm receiver 100 of this embodiment can improve the work efficiency when installing the district name sheets 90.

[0057] In the fire alarm receiver 100 of this embodiment, the district name is written along the horizontal direction (X direction).

[0058] This reduces the difference between the horizontal (X-direction) and vertical (Y-direction) lengths of the district name sheet 90. Therefore, the fire alarm receiver 100 of this embodiment can reduce the possibility of the district name sheet 90 being bent or folded when it is installed.

[0059] In the fire alarm receiver 100 of this embodiment, each of the district window covers 30 is equipped with an end cover 49 that overlaps with the district name located at the vertical (Y-direction) end of one district name sheet 90 and is detachable from the main body 20.

[0060] This makes it possible to insert the district name paper 90 into the gap between the other district window cover 30 and the main body 20 with the end cover 49 removed. The fire alarm receiver 100 of this embodiment makes it easier to install the district name paper 90. In addition, since the district name paper 90 is temporarily fixed by the other district window cover 30, it is less likely that the district name paper 90 will shift or fall when the end cover 49 is attached to the main body 20.

[0061] In the fire alarm receiver 100 of this embodiment, the multiple district window covers 30 include a first cover 41 that overlaps with the district name indicating the location of a fire and is either uncolored or colored, and a second cover 42 that overlaps with the district name indicating the location of an abnormality other than a fire and is either uncolored or colored in a different color from the first cover 41.

[0062] As a result, the fire alarm receiver 100 of this embodiment can change the color of the district window 191, which displays the district name, depending on the type of abnormality that has occurred. Furthermore, by coloring the district window cover 30 instead of the district name paper 90, the deterioration of the color over time can be reduced. In addition, compared to printing the color on the district name paper 90, the variation in how people perceive the color can be reduced (making it easier to maintain color universal design).

[0063] In the fire alarm receiver 100 of this embodiment, the display unit (area display unit 15) includes a plurality of area name sheets 90 arranged horizontally (in the X direction) on the main unit 20.

[0064] As a result, the fire alarm receiver 100 of this embodiment can display a large number of district names. In addition, the difference between the horizontal (X direction) length and the vertical (Y direction) length of the display unit (district display unit 15) becomes smaller. Therefore, the fire alarm receiver 100 of this embodiment can improve the readability of multiple district names.

[0065] In the fire alarm receiver 100 of this embodiment, the district window cover 30 overlaps with a plurality of district name sheets 90 arranged in a horizontal direction (X direction).

[0066] This allows one district window cover 30 to cover multiple district name sheets 90. As a result, the number of times the district window cover 30 needs to be attached to the main body 20 is reduced. The fire alarm receiver 100 of this embodiment can further improve the work efficiency when installing the district name sheets 90.

[0067] In the fire alarm receiver 100 of this embodiment, the zone window cover 30 is separable in the lateral direction (X direction). A portion of the separable zone window cover 30 can be attached to the main body 20.

[0068] This makes it possible to use multiple district window covers 30 of the same shape and layer district window covers 30 of different colors for each district name. Therefore, since there is no need to prepare multiple types of district window covers 30 with different shapes, the fire alarm receiver 100 of this embodiment can be manufactured more easily.

[0069] In the fire alarm receiver 100 of this embodiment, the main body 20 is provided with retaining claws (first retaining claw 23 and second retaining claw 24) for holding the district window cover 30 at positions corresponding to each of the multiple district names arranged in the horizontal direction (X direction).

[0070] As a result, the district window cover 30 is held in place at multiple points in the horizontal direction (X direction), thus suppressing deformation (bending) of the district window cover 30. The fire alarm receiver 100 of this embodiment can reduce the possibility of the district window cover 30 shifting or falling. Furthermore, if there are multiple types of abnormalities to display in a single row composed of district names arranged horizontally (X direction), it becomes possible to attach district window covers 30 of different colors to each district name.

[0071] In the fire alarm receiver 100 of this embodiment, the zone window cover 30 is provided with one or more claw-fitting recesses (end recess 37 and intermediate recess 38) into which retaining claws (first retaining claw 23 and second retaining claw 24) are fitted. At least one of the claw-fitting recesses is provided with a fitting confirmation indicator that is exposed when the retaining claw is not fitted and is not exposed when the retaining claw is fitted.

[0072] This makes it possible to check at a glance whether the retaining claws are properly engaged with the district window cover 30. In particular, when a single district window cover 30 is held in place at multiple locations in the lateral direction (X direction), it is possible to reliably prevent the retaining claws from failing to engage properly.

[0073] In the fire alarm receiver 100 of this embodiment, the main body 20 is provided with a recess 22 into which the district name sheet 90 is fitted.

[0074] This makes it less likely for the district name paper 90 to get caught in the gap between the district window covers 30 when inserting it into the gap between the main body 20 and the district window cover 30. The fire alarm receiver 100 of this embodiment can further improve the work efficiency when installing the district name paper 90. In addition, the district name paper 90 catches on the inner wall of the recess 22. For this reason, the fire alarm receiver 100 of this embodiment can reduce the possibility of the district name paper 90 falling out of the gap between the main body 20 and the district window cover 30.

[0075] In the fire alarm receiver 100 of this embodiment, the depth of the recess 22 is greater than the thickness of the district name paper 90.

[0076] This makes it less likely for the district name paper 90 to get caught on the district window cover 30 when inserting it into the gap between the main unit 20 and the district window cover 30. The fire alarm receiver 100 of this embodiment can further improve the work efficiency when installing the district name paper 90.

[0077] The fire alarm receiver 100 of this embodiment can also be described as follows. The fire alarm receiver 100 of this embodiment is a fire alarm receiver equipped with a display unit (area display unit 15) that displays the location of an abnormality. The display unit comprises a main body 20, an area name sheet 90 on which the area name is written and placed on the surface of the main body 20, an area window cover 30 attached to the main body 20 so as to overlap the area name sheet 90 and which is translucent, and a top cover 50 attached to the main body 20 so as to overlap the area window cover 30. The top cover 50 comprises a translucent transparent portion 51 that overlaps the area name and is translucent, and a shielding portion 53 arranged around the transparent portion 51 and having a lower transmittance than the transparent portion 51. The length W51 of the transparent portion 51 in the lateral direction (X direction) is smaller than the length W90 of the area name sheet 90 in the lateral direction (X direction).

[0078] As a result, the top cover 50 can conceal both ends of the district name sheet 90 in the horizontal direction (X direction). Therefore, the fire alarm receiver 100 of this embodiment can make any horizontal misalignment (X direction) of the district name sheet 90 less noticeable.

[0079] In the fire alarm receiver 100 of this embodiment, the length H51 in the vertical direction (Y direction) of the transparent section 51 is smaller than the length H30 in the vertical direction (Y direction) of the district window cover 30.

[0080] As a result, the top cover 50 can conceal both ends of the district window cover 30 in the vertical direction (Y direction). Therefore, the fire alarm receiver 100 of this embodiment can make the gaps between the district window covers 30 less noticeable.

[0081] In the fire alarm receiver 100 of this embodiment, the main body 20 includes retaining claws (first retaining claw 23 and second retaining claw 24) for holding the district window cover 30, and fitting parts (first fitting part 26 and second fitting part 27) for holding both ends of the top cover 50 in the lateral direction (X direction). The retaining claws are provided with chamfers (chamfers 231 and chamfers 241) at their ends in the lateral direction (X direction).

[0082] This makes it less likely for the top cover 50 to catch on the retaining claws when sliding it laterally (in the X direction) to fit it into the mating part. Therefore, the installation of the top cover 50 of the fire alarm receiver 100 in this embodiment can be made easier.

[0083] The fire alarm receiver 100 of this embodiment can also be described as follows. The fire alarm receiver 100 of this embodiment is a fire alarm receiver equipped with a display unit (area display unit 15) that displays the location of an abnormality. The display unit comprises a main body 20, an area name sheet 90 on which the area name is written and placed on the surface of the main body 20, and an area window cover 30 that is attached to the main body 20 so as to overlap the area name sheet 90 and is translucent. The main body 20 comprises a first retaining claw 23 that holds the area window cover 30, and a second retaining claw 24 that holds the area window cover 30 at a position laterally different from the first retaining claw 23 with respect to the area name sheet 90. The first retaining claw 23 has a chamfer 231 at the end facing the second retaining claw 24. The second retaining claw 24 has a chamfer 241 at the end opposite to the end facing the first retaining claw 23.

[0084] This allows the district window cover 30 to be held at multiple locations in the lateral direction (X direction). In this case, when sliding the district window cover 30 in the lateral direction (X direction), there is a possibility that the district window cover 30 may get caught on the first retaining claw 23 or the second retaining claw 24. To address this, by providing the first retaining claw 23 with a chamfer 231 and the second retaining claw 24 with a chamfer 241, the district window cover 30 becomes easier to overcome the first retaining claw 23 or the second retaining claw 24. Therefore, the fire alarm receiver 100 of this embodiment can hold the district window cover 30 at multiple locations in the lateral direction (X direction) and reduces the possibility of the district window cover 30 getting caught on the first retaining claw 23 or the second retaining claw 24.

[0085] In the fire alarm receiver 100 of this embodiment, the second retaining claw 24 is provided with a chamfer 243 at the corner facing the district name sheet 90.

[0086] This makes it easier to insert the district window cover 30 inside the second retaining claw 24. Also, the two chamfers on the second retaining claw 24 (the chamfer 241 on the end opposite to the end facing the first retaining claw 23, and the chamfer 243 on the corner facing the district name sheet 90) are less likely to overlap in the lateral direction (X direction). Therefore, in this embodiment, the fire alarm receiver 100 can suppress the second retaining claw 24 from becoming thicker in the depth direction compared to the case where the two retaining claws on the second retaining claw 24 overlap in the depth direction (Z direction).

[0087] In the embodiment described above, the top cover 50 is slid laterally (in the X direction) and fitted into the fitting portion (first fitting portion 26 and second fitting portion 27), but the method of fitting the top cover 50 is not limited to this.

[0088] The top cover 50 is made of an elastically deformable material. For example, the top cover 50 is made of a thin sheet of polycarbonate (PC). When fitting the top cover 50 into the fitting portion (first fitting portion 26 and second fitting portion 27), it is also possible to push the top cover 50 in from the front and elastically deform the first projection 56, the second projection 57 and the surrounding area to fit the top cover 50.

[0089] Furthermore, the first retaining claw 23 may be provided with a chamfer for the district window cover that corresponds to the chamfer 243 of the second retaining claw 24. The chamfer for the district window cover is provided at the corner that is both the +X and +Z end of the first retaining claw 23. It can also be said that the chamfer for the district window cover is provided at the corner facing the district name sheet 90.

[0090] As mentioned above, if the general procedure is to push the top cover in from the front, the chamfer 231 may be omitted, and the first retaining claw 23 may be provided only with a chamfer for the district window cover.

[0091] In the above embodiment, perforations 39 are arranged on both sides of the intermediate recess 38 in the Y direction, but the items placed in that location are not limited to perforations. For example, the items placed in that location may consist of printing or the like, and may be configured to function as markers when dividing the area window cover 30 in the X direction.

[0092] The depth D22 of the recess 22 is preferably 0.4 mm or more, but is not limited to this. Since the thickness of the district name paper 90 is, for example, about 0.1 mm, the district name paper 90 can be placed in the recess 22 if the depth D22 is about 0.1 mm or more. The ease of installation can be improved by making the depth D22 of the recess 22 larger than the thickness of the district name paper 90, but if the depth D22 of the recess 22 is made larger, the district name paper 90 may fall out, so it is desirable to set it to an appropriate value. Alternatively, the district name paper 90 may be held without providing a recess 22. In this case, for example, measures such as moving the first retaining claw 23 and the second retaining claw 24 toward the -Z direction can be taken so that the district window cover is positioned toward the -Z direction of the district name paper 90.

[0093] The first retaining claw 23 and the second retaining claw 24 located between the two recesses 22 are in different positions in the lateral direction (X direction), but are not limited to this. The first retaining claw 23 and the second retaining claw 24 located between the two recesses 22 may be configured as a single common retaining claw. In this case, the +X direction end of the common retaining claw engages with a part of the district window cover 30, and the -X direction end of the common retaining claw engages with the -X direction end of the intermediate recess 38. [Explanation of symbols]

[0094] 10 cabinets 11 Main unit 13 Doors 14 Display Panel 15 District display section 16. Type display section 17 Operation display section 19 District Window Panels 20 Main unit 21 Base 22 recess 23 1st holding claw (holding claw) 24 2nd holding claw (holding claw) 25 round holes 26. First mating section (matting section) 27. Second mating section (matting section) 28 Upper claw 29 Lower claw 30 District Window Covers 31 Covering part 33 Connecting part 35 End protrusion 36. Display section for confirming fitting 37 End recess (claw fitting recess) 38 Intermediate recess (claw-fitting recess) 39 perforations 41 Cover 1 42. Second cover 49 End cover 50 Top Cover 51 Transparent part 53 Shielding part 55 Lamp window 56 1st protrusion 57 Second protrusion 90 District name paper 100 Fire alarm receiver 101 Receiving member 101a Side plate 101b Front panel 101c Top board 101d inclined plate 103 Roller support member 105 Laura 107 tablets 191 District Window 193 Indicator light 231, 241, 243 Chamfer 301 Window cover piece for District 1 302 Second District Window Cover Piece

Claims

1. A fire alarm system equipped with a display unit that shows the location of an abnormality, The aforementioned display unit is The main unit and A district name sheet is provided, which is placed on the surface of the main body, A district window cover is attached to the main body so as to overlap the district name sheet, and has light-transmitting properties in at least the portion that overlaps the district name. Equipped with, The aforementioned area is equipped with multiple window covers, Multiple of the aforementioned district window covers are It comprises a portion that overlaps with the aforementioned district name and a portion that does not overlap with the aforementioned district name, At least the portion that does not overlap with the aforementioned district name is colored differently depending on whether the overlapping district name indicates the location of a fire or whether the overlapping district name indicates the location of an abnormality other than a fire. Fire alarm system.

2. A fire alarm system equipped with a display unit that shows the location of an abnormality, The aforementioned display unit is The main unit and A district name sheet is provided, which is placed on the surface of the main body, A district window cover is attached to the main body so as to overlap the district name sheet, and has light-transmitting properties in at least the portion that overlaps the district name. Equipped with, The aforementioned area is equipped with multiple window covers, Multiple of the aforementioned district window covers are It comprises a portion that overlaps with the aforementioned district name and a portion that does not overlap with the aforementioned district name, At least one of the parts of the district name that overlaps with it and the part that does not overlap with it is colored differently depending on whether the overlapping district name indicates a fire location or an abnormality location other than a fire. Fire alarm system.

3. A fire alarm system equipped with a display unit that shows the location of an abnormality, The aforementioned display unit is The main unit and A district name sheet is provided, which is placed on the surface of the main body, A district window cover is attached to the main body so as to overlap the district name sheet, and has light-transmitting properties in at least the portion that overlaps the district name. Equipped with, The aforementioned area is equipped with multiple window covers, It comprises a portion that overlaps with the aforementioned district name and a portion that does not overlap with the aforementioned district name, Each of the multiple district window covers has at least a different color depending on whether the overlapping district names indicate a fire location or a location of an abnormality other than a fire. Fire alarm system.

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