JP3047262B2 - Fire alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm apparatus having a display unit and an operation unit provided on a door of a casing, such as a fire receiver and an interlocking operation panel.

[0002]

2. Description of the Related Art FIG. 11 is an exploded perspective view showing an example of a door portion of a conventional fire receiver, and FIG. 12 is a longitudinal sectional view thereof. In the figure, reference numeral 101 denotes a door made of a metal plate which is attached to a main body (not shown) via a hinge so as to be openable and closable.
A square window hole 103 is provided slightly above the center of the window 2, and a shine trim 104 of a synthetic resin molded product is attached to an edge of the window hole 103. 105 is the front panel 1
A number of stud bolts erected by spot welding on the back surface of the stud.

[0006] Reference numeral 106 denotes a frame for an operation unit made of a metal plate. A switch plate provided with a hole 107 fitted in a stud bolt 105, the front surface of which is in contact with the shine trim 104 of the door 101, and further provided with a number of switches and the like. 10
Nine holes 110 are fitted and fixed by nuts 111. Reference numeral 112 denotes a printed circuit board support frame having a Z-shaped cross section.
, And fixed with a nut 111, the printed board 115 is brought into contact with the other piece and the frame 106, and the screw hole 10 is
Screws 116 are screwed into 8,114 and fixed.

Reference numeral 117 denotes a display plate made of a metal plate and having an L-shaped cross section. The display plate 117 is provided with a large number of display windows 118, and these display windows 118 are provided with a window frame 119 and a window plate 1 made of a synthetic resin.
20, respectively. Reference numeral 122 denotes a printed circuit board support frame having a Z-shaped cross section. A hole 121 provided in the display panel 117 is fitted into the stud bolt 105 of the door 101 and its front surface is brought into contact with the shine trim 104. Hole 12 in one piece
3 is fitted into the stud bolt 105 and fixed with the nut 111. Then, the printed circuit board 124 is brought into contact with the other piece of the printed circuit board support frame 122, a screw 116 is inserted into the hole 125, screwed into the screw hole 123a, and fixed.

In this manner, the operation unit and the display unit are the door 1
01 and is connected to a printed circuit board or the like provided in the main body. Then, when a required operation is performed by the operation unit and a fire occurs, an alarm is issued and the indicator lamp of the area on the display board is turned on.

[0006]

The conventional fire receiver configured as described above has the following problems. (1) Since a large number of stud bolts 105 are attached to the back of the front plate 102 of the door 101 by spot welding,
The surface plate 102 is distorted, and welding marks remain on the surface, which is unsightly. (2) The parts and tools may hit the stud bolts 105 during assembly work to damage the parts, and the stud bolts 105 may bend, making the repair troublesome. (3) Shine trim 1 at the edge of window hole 103 of door 101
04, and a window frame 119 is attached to the display window 118 of the display panel 117. Further, since the operation unit and the display unit are inserted into the stud bolts 105 and fixed with nuts or screws, there are many cases. Parts are required, and assembling also requires many man-hours, which leads to an increase in cost.

(4) A shine trim 104 is attached to the edge of the window hole 103 of the door 101 to form a window frame. However, aligning the four corners of the shine trim 104 at right angles is troublesome and requires a lot of time. In addition, the central part of the shine trim 104 attached above and below the window hole 103 may bend and impair the aesthetic appearance. (5) The display panel 117 is provided with, for example, 20 display windows 118 to display fires in 20 districts. (~ 80 districts). Therefore, when the number of display windows 118 increases, a display unit corresponding to each increase must be manufactured each time, which is not only extremely troublesome but also increases the cost.

[0008] As a solution to the above-mentioned problems such as the traces caused by spot welding of stud bolts and the complicated assembling work using shine trims, bolts, nuts, and screws, a device disclosed in Japanese Utility Model Publication No. 58-40265. There is. Panel products such as the fire detection device according to the present invention are:
A side wall having an open edge with a step is formed on a door attached to the outer box by squeezing, and a first hook nail is provided on one open edge, and a second hook nail is provided on the other open edge. A display plate provided with an engaging hole through which the first hooking claw is inserted and an operation plate provided with an engaging hole through which the second hooking claw is inserted are provided. It is integrated by holding and joining, these are engaged with the first and second hooking claws, and are respectively attached to the open edges of the door by the stoppers.

According to the panel product having the above structure, the problems of the shine trim and the stud bolt are caused by providing the side wall at the edge of the opening of the door and providing the hooking claw to engage the display plate with the operation plate. The problem was solved by engaging the holes, but since the display board and the operation board are installed inside the width of the side wall from the surface of the door, the door, and thus the entire product, becomes thicker by that amount,
We cannot respond to the demand for thinning. Further, a gap is easily formed between the side wall provided at the opening of the door and the display plate and the operation plate attached to the side wall, and there is a problem that dust and the like enter the main body from the gap. Further, as described above, when the number of reception areas increases, a display unit must be manufactured each time, and this problem has not yet been solved.

The present invention has been made in order to solve the above-mentioned problems, and has a small number of parts, is easy to assemble, can easily add a display panel, and can further reduce the size and cost. The purpose of the present invention is to obtain a fire alarm device that can perform the operation.

[0011]

In the fire alarm device according to the present invention, a window hole having a plurality of engagement pieces projecting inward at predetermined intervals is formed on a side edge of a door attached to a housing. And
At least a flange is formed on the side edge, and an operation plate and a display plate having a groove formed on the back surface of the flange are inserted into the window hole of the door, and the flange is locked on the periphery of the window hole, and the side edge is formed. The provided groove is engaged with the engaging piece of the window hole.

Further, in the fire alarm device according to the present invention, the door attached to the housing is provided with a window hole having a plurality of engaging pieces projecting inward at predetermined intervals on both side edges. And an operation plate having a flange formed on the lower edge and grooves formed on the back and upper edges thereof is inserted into the window hole of the door, and the flange is locked on the periphery of the window hole, and provided on the side edge. The groove is engaged with the engagement piece of the window hole, and the groove provided on the lower edge is engaged with the lower edge of the window hole, respectively, and a flange is formed on the side edge and the upper edge, and the back of the flange on the side edge In addition, a display plate with a groove formed on the lower edge is inserted into the window hole of the door and its flange is locked on the periphery of the window hole, and the groove provided on the side edge is engaged with the window hole. In this case, a protruding piece provided at the lower edge of the piece is engaged with a groove of the operation plate.

Further, in the above fire alarm device, a flange is formed on a side edge portion, and a groove is formed on a back surface of the flange.
In addition, at least one additional display panel provided with a protruding piece at a lower edge portion is interposed between the operation panel and the display panel.
Further, the display plate is fixed to the door with a holding bracket, or a reinforcing plate is provided on the back surface of the display plate or the additional display plate,
A spring is provided for pressing a display plate, an operation plate, and the like mounted in a window hole of the door downward. Furthermore, a plurality of concave display portions are provided on the surfaces of the display plate and the additional display plate, and a window plate is fitted to the display portions.

A door attached to the housing has a window formed with a plurality of engaging pieces projecting inward at predetermined intervals on a side edge, and the side is engaged with the engaging piece of the window. The display panel is divided into a plurality of pieces, and the display boards are sequentially engaged from the engagement pieces below the window hole, and a required number of display boards are attached to the window hole.

[0015]

The operation plate is inserted into the window hole of the door, and the groove is fitted to the lower edge of the window hole and the engaging piece. At this time, the flange of the operation plate contacts the outer peripheral surface of the window hole. Next, the display plate is inserted into the window hole, the groove is engaged with the engaging piece of the window hole, and the protruding piece is fitted into the groove provided on the upper edge of the operation plate. As a result, the operation plate and the display plate are integrated and mounted in the window hole, and the outer peripheral front surface of the window hole is covered in a frame shape by the flange.

When an additional display panel is installed, the additional display panel is inserted into the window hole after the operation plate is mounted, and the groove is engaged with the engagement piece, and the projection is inserted into the groove of the operation plate. Fit. Next, the display plate is inserted into the window hole to engage the groove with the engaging piece, and the protruding piece is fitted into the groove of the additional display plate to integrally connect them. Further, the display plate, the operation plate, and the like are held and fixed at predetermined positions by engaging the legs of the presser fitting with the engaging portions provided on the display plate and fixing the main body to the door.

Further, by providing a reinforcing plate fixed to the door at both ends across the display panel or the additional display panel and fixed to the back of the display panel or the additional display panel, Even if the display unit is pressed from the front for replacement or the like, the display panel or the additional display panel does not warp or bend. Further, by providing a spring that presses a display plate or the like mounted in the window hole downward in the vicinity of the window hole, the display plate or the like does not move up and down in the window hole and is always held at a predetermined position. .

Further, since a concave display portion is provided on the surface of the display panel and the additional display panel, there is no need to mount a window frame on the display window as in the conventional case.

[0019]

FIG. 1 is a perspective view of an embodiment of the present invention showing a state in which a door is opened, FIG. 2 is an exploded perspective view of a main part of FIG. 1, and FIG. 3 is a perspective view showing a connection relation of each part. In this embodiment, an example is shown in which the present invention is applied to a fire receiver. In the figure, 1 is a box-shaped housing made of a metal plate, and 2 is a door made of a metal plate which is attached to the housing 1 via a hinge so as to be openable and closable. 3 is an operation plate provided on the door 2, 4 is a display plate, 5
Reference numeral denotes an additional display panel, 6 denotes a holding member of the display panel 4, 7 denotes a reinforcing plate of the display panel 4, 8a and 8b denote printed boards, 9 denotes insulating paper, 10 denotes a receiver, and 10a denotes a holder thereof.

Reference numeral 12 denotes a wiring duct fixed to the back plate 11 of the housing 1, 13 denotes a printed board, 14 denotes a terminal block mounted on the printed board 13, and 15 denotes a protection plate for the printed board 13. 16 is a transformer mounted on the back plate 11, 17 is a discharge resistor, 18a is a power line insertion hole provided on the back plate 11, 18b is a signal line insertion hole, 19 is a standby power supply, and 20 is the housing 1. A mounting hole for mounting on a wall or the like.

In the door 2 (refer to FIG. 2 in particular), reference numeral 22 denotes a window hole provided slightly above the center of the front plate 21, and a plurality of engaging members projecting inward at predetermined intervals on both side edges thereof. A combination piece 23 is provided. The height h of the window hole 22 in the vertical direction is determined by the operation plate 3, the display plate 4, and the additional operation plate 5.
Are formed slightly longer than the total height of. In addition, window hole 2
2 shows an example in which a narrow engaging piece 23 is provided above and a wide engaging piece 23 is provided below, but all the engaging pieces 23 may have the same width. 24 is a stud nut provided on the back of the front plate 21 above the window hole 22;
Reference numeral 5 denotes a stud bolt provided on the rear surface of the front plate 21 slightly above both sides of the window hole 22.

The operation plate 3 (particularly, see FIG. 3) is made of a synthetic resin molded product.
Is formed to a width W ₁ which is substantially matched to the width W, the side edges and the lower edge of the main body 30, a flange is formed by bending outwardly after forming the side walls and bottom wall to project to the front An L-shaped bezel 31 is provided integrally with the main body 30. A plurality of protrusions 32 are provided on the side wall of the bezel 31 and the upper edge of the main body 30, and a protrusion 33 is provided on the lower wall over substantially the entire length. Grooves 34, 3 are provided between the flange and the main body 30, respectively.
5, 36 are formed. The length L ₁ of the projection 32 provided on the side wall of the bezel 31 is slightly shorter than the interval g of the engagement piece 23 provided below the window 22 of the door 2, and
The interval g1 of ₂ is slightly larger than the length L of the engagement piece 23.

Numeral 37 denotes a plurality of power supply holding portions provided on the back surface of the main body 30, and as shown in FIG.
and a substantially L-shaped holding piece 3 erected at a substantially right angle from one edge of the window hole 30a and then bent substantially parallel to the main body 30 and slightly bent inward at the lower end.
7a, a plurality of wires are inserted between the main body 30 and the holding piece 37a and held. Reference numeral 38 denotes a plurality of stud nuts protruding from the rear surface of the main body 30, and 38a denotes a printed circuit board 8a and the main body 30.
A projection for regulating the interval between the projections, 39 is also a locking piece,
39a is a membrane sheet for the operation plate.

The display panel 4 is made of a synthetic resin molded product, and the main body 40 is formed to have a width W ₂ substantially matching the width W of the window hole 22 of the door 2. A bezel 41 is formed integrally with the main body 40. The bezel 41 is formed integrally with the main body 40 by forming a side wall and an upper wall protruding from the front surface and then bending outward to form a flange. An inverted L-shaped projecting piece 42 having a groove 43 formed at the lower side is provided between the side wall and the flange of the bezel 41, and the projecting piece is formed on the lower wall over substantially the entire length. 42a is provided. Note that the projecting piece 42 provided on the side wall may be formed in an I-shape, and the groove 43 having an open top and bottom may be formed.

Reference numeral 44 denotes an indicator light insertion hole 44a.
As shown in Fig. 7, a plurality of display portions each having a rectangular concave portion formed on the front surface thereof, and a window plate 45 having a membrane sheet 45a for a window plate is mounted in the concave portion on the front surface. 46 is the main body 40
A groove 46 provided above the rear surface of the
It is an engaging portion having a. In addition, a stud nut 47, a protrusion 48a for regulating the interval, and a locking piece 48 are provided on the rear surface of the main body 40 in a protruding manner.

The additional display panel 5 is made of a synthetic resin molded product, and the main body 50 is formed to have a width W ₃ substantially matching the width W of the window hole 22 of the door 2. A bezel 51 is formed integrally with the main body 50. The bezel 51 has a flange formed by projecting to the front surface and forming a side wall and then bent outward. An inverted L-shaped protruding piece 52 having a groove 53 formed at its lower part is provided between the side wall of the bezel 51 and the flange.
A protrusion 54 is provided on the upper edge portion, a groove 55 is formed between itself and the main body 50, and a protrusion 52a is provided on the lower edge portion over substantially the entire length. The protruding piece 5 provided on the side wall
2 may be formed in an I-shape, and a groove 55 having an open top and bottom may be formed.

Reference numeral 56 denotes a plurality of display sections having an insertion hole 56a for an indicator light and having a rectangular recess formed on the front surface similarly to the display board 4, and a membrane sheet 45a for a window plate is provided in the recess on the front face. Is mounted. The main body 50
On the back of the stud nut 57, a projection 58 for spacing regulation
a and a locking piece 58 are protruded. 5a and 5b are additional display panels having the same structure as the additional display panel 5 described above.

The holding member 6 is made of a metal material, and comprises a main body 60 and leg portions 61 provided on both sides thereof and fitted into grooves 46a of the engaging portions 46 provided on the display panel 4, as shown in FIG. The upper end and lower sides of the main body 60 are located on the front plate 2 of the door 2.
In order to maintain the distance from the first, it is bent substantially at a right angle. Reference numeral 62 denotes an elongated hole into which a screw screwed into the stud nut 24 provided on the front plate 21 is inserted.

The reinforcing plate 7 is made of a metal material, and is longer than the width W of the window hole 22 of the door 2 as shown in FIG. The bent main body 70, a mounting piece 71 projecting from the center of the upper edge of the main body 70, and bent outward from the lower edge of the main body 70, and then bent downward substantially in parallel with the main body 70, The reinforcing portion 72 is slightly bent inward, and the both ends of the main body 70, the mounting piece 71 and the reinforcing portion 72 are provided with the screw insertion holes 7.
3, 74, 75 are provided, and a spacer 76 is attached to the inside of the reinforcing portion 72 by a screw inserted from a screw insertion hole.

On the printed circuit boards 8a and 8b, stud nuts 3 provided on the operation plate 3, the display plate 4 and the additional display plate 5 are provided.
Screw insertion holes 81 for screwing screws into 8, 47, 57
a, 81b and locking holes 82a, 82b for locking the locking pieces 39, 48, 58, etc. are provided, and the insertion holes 4 of the display board 4 and the additional display board 5 are provided on the surface of the printed circuit board 8b.
Indicator lights inserted into 4a and 56a are mounted. Reference numeral 83 denotes a buzzer.

Next, an example of an assembling sequence of the present invention configured as described above will be described with reference to FIGS. 1 to 3 and FIG. (1) The operation plate 3 is positioned in front of the window hole 22 of the door 2, and the protruding piece 32 is inserted between the engaging pieces 23 to move the main body 30 to the window hole 22.
Put in. At this time, since g> L ₁ and L <g ₁ are formed, the operation plate 3 can be easily inserted. Then, the operation plate 3 is pushed down. As a result, the groove 35 provided at the lower end of the main body 30 is fitted to the lower edge of the window hole 22, and each engaging piece 23 is fitted to the groove 34 of the bezel 31. The flange of the bezel 31 contacts the side edges and the lower edge of the window hole 22.

(2) Similarly, the main body 5 of the additional display panel 5
0 is put into the window hole 22 and pushed down. This allows
The protrusion 52a provided on the lower edge of the main body 50 fits into the groove 36 provided on the upper edge of the operation plate 3, and the groove 53 provided on the side wall.
Are fitted into the engagement pieces 23 and locked. At this time, the flange of the bezel 51 contacts the front surface of the side edge of the window hole 22 continuously with the flange of the operation plate 3.

(3) Then, the main body 40 of the front plate 4 is put into the window hole 22 and is pushed down. Thereby, the main body 40
The protruding piece 42a provided on the lower edge portion is fitted into the groove 55 provided on the upper edge portion of the additional display panel 5, and the groove 43 provided on the side wall is fitted and locked in the engaging piece 23. You. At this time, bezel 4
The first flange abuts on the side edges of the window hole 22 and the front surface of the upper edge continuously with the flange of the additional display panel 5, and the peripheral edge of the window hole 22 is covered in a frame shape by the flange. FIG. 10 shows the state at this time. It should be noted that no screws or nuts are used in the work so far.

(4) Engaging part 46 provided on the back of display panel 4
The leg 61 of the stopper 6 is fitted into the groove 46a, and the long hole 62 is brought into contact with the stud nut 24 and fixed with the screw 63.
Next, the printed circuit board 8b is brought into contact with the back surface of the display panel 4 to lock the engaging hole 82b with the locking piece 48, and the screw inserted into the screw insertion hole 81b is screwed into the stud nut 47.
Fix it.

(5) Printed circuit board 8a on the back of operation plate 3
And the engaging hole 82a is locked to the locking piece 39,
Screw the stud nut 38 into the screw insertion hole 81a.
And fix it. Next, the insulating paper 9 is attached to the back surface of the printed circuit board 8a using pins or the like. Further, the printed circuit board 8c and the insulating paper 9 are fixed to the lower rear portion of the operation plate 3 with screws. The insulating paper 9 is provided to prevent a tool or the like from contacting a wiring pattern or the like provided on the back surface of the printed circuit board 8a to damage or short-circuit them. Substrate (eg, printed circuit board 8
When b) is used, the insulating paper 9 may be omitted.

(6) The holes 74 of the reinforcing plate 7 are fitted into the stud bolts 25 provided on the back of the front plate 21 of the door 2 to bridge the printed circuit board 8b, and the main body 70 is added via the printed circuit board 8b. Abuts on the back of the display panel 5 and is fixed with a nut. In this case, since the reinforcing portion 72 is bent rearward and is in contact with the insulating paper 9 via the spacer 76, there is no adverse effect on the wiring pattern and the like of the printed circuit board 8a.

FIG. 9A is a cross-sectional view of a main part of another embodiment of the present invention. In this embodiment, the rear end of the front plate 21 of the door 2 is close to the window hole 22 and the front end thereof is formed. A spring 65 is provided so as to be located in the window hole 22. As described above, the vertical length h of the window hole 22 provided in the door 2 is slightly longer than the total height of the operation plate 3, the display plate 4, and the additional display plate 5. Therefore, when these are attached to the window hole 22, a slight gap is generated between the display panel 4 and the upper edge of the window hole 22. In the present embodiment, since the display plate 4 and the like are always urged downward by the spring 65, there is no possibility that the display plate 4 and the like will move up and down even if the display plate 4 and the like are shaken during transportation. Can be held in position. FIG.
(B) shows still another embodiment of the present invention. In this embodiment, a spring piece 65a extending obliquely upward toward the front surface integrally with the display plate 4 at the upper edge of the display plate 4. When the display panel 4 or the like is mounted in the window hole 22, the front end thereof is locked to the upper edge of the window hole 22 to urge the display panel 4 or the like downward. .

In the above-described embodiment, the case where one additional display panel 5 is used has been shown. However, the number can be appropriately increased or decreased according to the number of reception areas. When the number of reception areas is small, the operation panel 3 is displayed. The fire receiver may be constituted only by the plate 4. Further, the reinforcing plate 7 may be omitted when the fire receiver is constituted only by the operation plate 3 and the display plate 4, and two or more reinforcing plates may be provided when many additional display plates are used.

[0039]

As described above in detail, according to the present invention, a window hole having a plurality of engaging pieces projecting inward at predetermined intervals is formed on a side edge of a door attached to a housing, A flange is formed on at least a side edge portion, and an operation plate and a display plate having a groove formed on the back surface of the flange are inserted into a window hole of the door,
The flange is locked on the periphery of the window hole, the groove provided on the side edge is engaged with the engagement piece of the window hole, and the engagement pieces are provided at both sides of the window hole of the door at predetermined intervals. The operation plate, which has flanges on both side edges and the lower edge, and has grooves on the back and upper edges, respectively, is inserted into the window of the door, and the flange is locked on the front of the window to lower the edge. The groove provided on the window hole is fitted to the lower edge of the window hole, and the groove provided on the side edge is engaged with the engaging piece. Insert a display panel with a groove on the back of the flange and a projection on the lower edge into the window hole of the door, lock the flange on the front of the window hole and operate the projection on the lower edge Fit into the groove provided on the board,
The grooves provided on the both side edges are engaged with the engaging pieces, and these are integrated and mounted in the window hole. Further, if necessary, flanges are provided on both side edges, and grooves are provided on the back and upper edges thereof. Is provided, and an additional display panel having a protruding piece provided on the lower edge portion is appropriately interposed between the operation panel and the display panel, so that the following remarkable effects can be obtained.

(1) Since no bolt or nut is used for mounting the operation panel, the display panel, and the additional display panel to the door, the assembly operation can be performed easily and in a short time. (2) Since stud bolts for mounting operation plates etc. are unnecessary,
The front plate of the door does not warp or leave traces due to spot welding. (3) The operation plate or the like is provided with a bezel having a flange, and the flange is used to cover the outer peripheral surface of the window hole in a frame shape. This eliminates the need for a shine trim as in the related art, thereby reducing the number of work steps. In addition, the design can be improved. Further, since the outer peripheral surface of the window hole is covered with the flange, there is no possibility that dust or the like may enter from between the operation plate or the like and the edge of the window hole.

(4) Since the operation plate or the like is directly mounted on the window hole provided in the front plate of the door, the door, that is, the entire device can be made thinner. (5) Since the number of additional display boards is increased or decreased according to the number of reception areas, it is extremely easy to cope with an increase or decrease in reception areas.

Further, since the display plate mounted in the window hole is fixed to the door by the holding metal, the display plate, the additional display plate and the operation plate can be securely held and fixed at predetermined positions. Furthermore, since a reinforcing plate is provided on the back side of the display panel or the additional display panel so as to bridge over them, even if the display panel is pushed from the front to replace the window panel of the display panel of the display panel or the like, the display panel or the display panel cannot be replaced. The additional display panel does not warp or bend. In addition, since the display plate and the like are urged downward by a spring provided near the window hole, there is no possibility that the display plate or the like moves in the vertical direction, and these can always be held at a predetermined position. it can.

Further, since a concave display portion is provided on the surface of the display panel and the additional display panel, and the window panel is directly mounted on the concave display section, it is necessary to mount a window frame on each display window as in the related art. Absent. Therefore, the number of work steps and parts can be reduced. As described above, according to the present invention, the structure is simplified, the number of parts is significantly reduced, and the number of assembling steps can be reduced as compared with the conventional apparatus. Therefore, a fire alarm apparatus which is low in cost and excellent in design can be obtained.

A window attached to the door has a plurality of engaging pieces protruding inward at predetermined intervals on a side edge, and the side is engaged with the engaging piece of the window hole. The display panel is divided into a plurality of sections, and the display boards are engaged sequentially from the engagement pieces below the window hole, and as many display boards as necessary are attached to the window hole. It is easy to increase or decrease the number of corresponding display boards.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention showing a state where a door is opened.

FIG. 2 is an exploded perspective view of a main part of the embodiment of FIG.

FIG. 3 is a perspective view showing a connection relation of respective parts in the embodiment of FIG. 1;

FIG. 4 is a front perspective view of an embodiment of the display panel.

FIG. 5 is a perspective view of an embodiment of an electric wire holding unit.

FIG. 6 is a perspective view of an embodiment of the presser fitting.

FIG. 7 is a perspective view of an embodiment of a reinforcing plate.

FIG. 8 is a cross-sectional view showing a state where an operation plate or the like is mounted on a door.

FIGS. 9A and 9B are cross-sectional views showing a main part of another embodiment of the present invention.

FIG. 10 is a front view of the embodiment of the present invention.

FIG. 11 is an exploded perspective view of a door portion of an example of a conventional fire receiver.

FIG. 12 is a longitudinal sectional view showing an assembled state of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Door 22 Window hole 23 Engagement piece 3 Operation plate 30 Main body 31 Bezel 32,33 Projection piece 34,35,36 groove 37 Wire holding part 4 Display plate 40 Main body 41 Bezel 42a Projection piece 43 Groove 44 Display part 45 Window plate 46 Engagement part 5 Display panel for extension 50 Main body 51 Bezel 52a Protrusion piece 53, 55 Groove 56 Display part 6 Holder 65, 65a Spring 7 Reinforcement plate 8a, 8b Printed circuit board

Claims (10)

(57) [Claims] A door attached to a housing is provided with a window hole having a plurality of engagement pieces projecting inward at predetermined intervals on a side edge, and a flange is formed on at least the side edge. An operation plate and a display plate having a groove formed on the back surface of the flange are inserted into a window hole of the door, the flange is locked on a peripheral edge of the window hole, and a groove provided on the side edge portion is inserted into the window hole. A fire alarm device characterized by engaging with an engagement piece of (1). 2. A door attached to a housing is provided with a window hole having a plurality of engaging pieces projecting inward at predetermined intervals on both side edges, and a flange is formed on the side edge and the lower edge. An operation plate having grooves formed on the back and upper edges thereof is inserted into the window hole of the door, and the flange is locked on the periphery of the window hole. With the engagement piece and the groove provided on the lower edge portion respectively engaged with the lower edge portion of the window hole,
A display plate having a flange formed at a side edge and an upper edge, a groove formed at the back of the flange at the side edge, and a projection formed at a lower edge is inserted into a window hole of the door, and the flange is inserted into the window. The groove provided on the side edge portion is engaged with the engagement piece of the window hole, and the projection provided on the lower edge portion is engaged with the groove of the operation plate. Fire alarm. 3. An at least one additional display panel having a flange formed on a side edge thereof, a groove formed on the back and upper edges of the flange, and a protruding piece provided on a lower edge thereof. The fire alarm device according to claim 1 or 2, wherein the fire alarm device is interposed between the fire alarm device and the fire alarm device. 4. A door which is provided on a side edge thereof with a plurality of engagement pieces projecting inward at predetermined intervals and which is provided on a housing so as to be openable and closable, and a width of the window hole. Side walls and a lower wall projecting orthogonally from both side edges and a lower edge of the main body having a width substantially matching with the main body, and front ends of the side walls and the lower wall extend outwardly perpendicular to the side walls and the lower wall. When the main body is inserted into the window hole, a bezel comprising a flange abutting on the outer peripheral surface of the window hole is formed integrally with the main body, and a locking piece and a lower edge portion of the window hole are provided on the back surface of the flange. An operation plate having a groove to be engaged and having a groove formed in the upper edge of the main body; and a side plate and an upper edge which are orthogonal to the side edges and the upper edge of the main body having a width substantially matching the width of the window hole. The protruding side wall and the upper wall, and the front end of the side wall and the upper wall extend outward perpendicular to the side wall, and the main body is inserted into the window hole. A bezel comprising a flange abutting on the outer peripheral surface of the window hole is formed integrally with the main body, and a groove is provided on the rear surface of the flange provided on the both side walls, with a groove in which the engagement piece of the window hole is engaged. A fire alarm device, comprising: a display panel provided with a protruding piece that engages with a groove of the operation plate at a lower edge portion of the main body. 5. A side wall protruding orthogonally from both side edges of a main body having a width substantially matching the width of a window hole, and a front end of the side wall extending outwardly perpendicular to the side wall. When the main body is inserted into the window hole, a bezel consisting of a flange abutting on the outer peripheral surface of the window hole is formed integrally with the main body, and a groove on the rear surface of the flange is provided with a groove with which the engaging piece of the window hole engages. At least one groove is provided at the upper edge of the main body and a projection is provided at the lower edge thereof.
The fire alarm device according to claim 4, further comprising a plurality of additional display panels. 6. A main body having an elongated hole and a leg extending downward from the main body. The leg is engaged with an engaging portion provided on a back surface of the display panel, and the main body is attached to a door. The fire alarm device according to any one of claims 1 to 5, further comprising a presser fitting for fixing. 7. A reinforcing plate fixed to both sides of a display plate or an additional display plate and fixed to a back surface of the display plate or the additional display plate. 6
The fire alarm device according to any one of the above. 8. The apparatus according to claim 1, further comprising a spring for pressing a display plate, an operation plate and the like mounted in the window hole downward.
8. The fire alarm device according to any one of items 1 to 7. 9. The display panel according to claim 1, wherein a plurality of concave display portions are provided on a surface of the display plate and the additional display plate, and a window plate is fitted to the display portions. Fire alarm device. 10. A door attached to a housing is formed with a window hole having a plurality of engagement pieces projecting inward at predetermined intervals on a side edge, and the side part is provided with an engagement piece of the window hole. The display plate to be engaged is divided into a plurality, and sequentially from the engagement piece below the window hole,
A fire alarm device, wherein a display board is engaged and a required number of display boards are attached to the window holes.