JPH07274318A - Fire alarm receiver - Google Patents

Abstract

PURPOSE:To decrease the number of components by mounting an indicating/ operating unit on the surface of front door hinged to the body containing a power supply board and electronic components and fixed with a back plate for forming a wiring chamber while opposing thermally susceptible electronic components to the power supply board and providing vents at the board containing part. CONSTITUTION:A front door 4 is hinged to the body of a fire alarm receiver 1 through a cut part 15 and a hinge mechanism 16. An indicating/operating unit 20 is mounted on the surface of the front door 4 whereas a control board 26, an LCD board 26, and the like are mounted on the inner face thereof. A wiring duct 74, a power supply board 75, and a power supply transformer 76 are mounted on the back plate 6 of the body 3. Thermal susceptible electronic components are opposed to the power supply board 75 and vents are provided at the part for containing the board 75. This structure decreases the number of components.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire receiver in which a front door of a box is provided with a display section and an operation section, and has a fire monitoring function, a gas leak monitoring function, a smoke prevention / exhaust gas emission interlocking control function and the like. It concerns a fire receiver.

[0002]

2. Description of the Related Art FIGS. 7 and 8 are diagrams for explaining the construction of a conventional fire receiver. The fire alarm device disclosed in Japanese Patent Laid-Open No. 5-62080 and the fire alarm receiver disclosed in Japanese Utility Model Publication No. 63-39826 are examples. Listed. In FIG. 7, 1 is a metal housing, 2 is a door, 3 is an operation plate, 4 is a display plate, and 5 is an additional display plate. 6 is a holding metal fitting, 7 is a reinforcing plate, 8a and 8b are printed circuit boards, 9 is insulating paper, and 10 is a handset. Two
2 is a window hole (not shown) of the door 2. The operation plate 3, the display plate 4, and the additional display plate 5 are fitted in the window holes 22 and attached to the door 2.

Reference numeral 11 is a back plate, 12 is a wiring duct, 13 is a power supply board, and 16 is a power transformer, which are attached to the back board 11 made of steel plates and housed inside the housing 1. Reference numerals 18a and 18b are through holes for the power supply wiring and the signal wiring. Reference numeral 20 denotes a mounting hole provided in the back plate 11, and the housing 1 is mounted on the wall surface by using the mounting hole 20.
Then, the wiring for power supply and the wiring for signals are once drawn out from the wall surface into the gap between the wall surface and the housing on the back side of the back plate 11,
It is adapted to be inserted into the insertion holes 18a and 18b and guided into the housing 1.

In the fire alarm receiver shown in FIG.
Reference numeral 1 is a main body, 2 is a lid, 3 is a printed circuit board, 6 is a metal plate radiator, 8 is a shield plate, 10 is a bottom rear surface, T is a power transformer, and W is a wall. The main body 1 and the lid body 2 are formed of synthetic resin, and the lower portion of the radiator 6 is fixed to the transformer T through the opening 12 and is provided on the back surface of the bottom portion with a gap from the wall W. Then, while the heat generated by the power transformer T is shielded by the shield plate 8, the heat is radiated to the outside through the radiator 6 on the back surface 10 as shown by B so that the inside of the housings 1 and 2 does not become a high temperature. It is configured.

[0005]

As described above, in the conventional fire alarm device shown in FIG. 7, the power supply board 13 and the power supply transformer 15 which easily generate heat are attached to the metal back plate 11. Therefore, various electronic components such as semiconductors such as a rectifier circuit and a constant voltage circuit are incorporated in the power supply board 13, and the influence of the heat generated by the power supply transformer 15 through the metal back plate 11 having a high thermal conductivity. I'm more likely to get When a heat-sensitive electronic component undergoes a thermal change, the input / output relationship changes, causing malfunction.

On the other hand, in the fire alarm receiver shown in FIG. 8, a radiator 6 having a wide area as much as possible is provided on the bottom rear surfaces 10 of the synthetic resin casings 1 and 2 so that the inside thereof does not become a high temperature. A shielding plate 8 that surrounds around T is also provided. Therefore, in the apparatus of FIG. 8, the number of parts increases and the cost increases.

In addition to this, although not shown in the drawing, the actual open flat 3-8
In the case of the shaft support structure of the opening / closing part applied to the fire alarm and the like described in Japanese Patent No. 6973, a complicated polygonal hole 8 into which the shaft body 1 having a shape similar to the outer shape of a bolt is inserted is provided. Further, not only the E ring is used for retaining, but also a groove for letting the E ring escape is formed. Therefore, also in the shaft supporting structure of Japanese Utility Model Laid-Open No. 3-86973, the structure is complicated, the number of parts is large, and the cost is high, as in the case of the conventional device shown in FIGS. There were problems such as.

The present invention has been made in order to solve the problems of the above-mentioned three conventional devices. It has a small number of parts, a low manufacturing cost, and a heat dissipation structure that effectively uses the internal space. It is intended to realize a fire receiver having various features such as easy operation.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided a main body in which a rear plate for forming a wiring chamber is mounted on the rear side and electronic components including a power supply board are accommodated therein, and a front door which is openably and closably held by the main body. In a fire receiver including a box formed of a metal plate composed of and, a fire receiver is configured by providing a substrate storage portion on a back plate and projecting the wiring chamber side. Further, the fire receiver is configured such that an electronic component having a high thermal influence mounted on a power supply board faces a board housing portion. In addition, the fire receiver is configured by providing a ventilation hole in the board housing portion.

Further, a box body composed of a main body and a front door both of which are molded from a plate material and formed with a bent piece along the opening / closing surface on the side of the opening / closing fulcrum side, and a cylindrical bearing at the tip are provided to fold the main body and the front door. In a fire receiver having an inner hinge forming a U-shaped arm surrounding a bent piece and a hinge mechanism including an outer hinge forming a plate bearing interposing a cylindrical bearing of the inner hinge, the fire receiver is surrounded by the U-shaped arm. The fire receiver is configured to change the opening / closing angle of the front door depending on the cutting depth of the cut portion of the bent piece on the front door side.

A box body composed of a main body and a front door, both of which are molded from a plate material and formed with a bent piece along the opening / closing surface on the side of the opening / closing fulcrum side, and a cylindrical bearing at the tip are provided to fold the main body and the front door. In a fire receiver including an inner hinge having a U-shaped arm surrounding a curved piece and a hinge mechanism including an outer hinge having a plate-shaped bearing interposing a cylindrical bearing of the inner hinge, a cylindrical bearing and a plate-shaped bearing are provided. This is a fire receiver in which a hinge shaft to be inserted is provided with a retaining screw.

[0012] Further, a box body including a main body having a back plate attached thereto and accommodating electronic components including a power supply substrate therein, and a front door which is held by the main body so as to be openable and closable and has a display operation unit mounted in a front mounting hole. In the fire receiver having the above, the fire receiver is configured by providing a retaining ring for retaining the wire bundle on the inner wall surface of the box. Further, the fire receiver is configured to hold the wiring bundle arranged in the front door by the holding ring.

[0013]

The bent piece on the hinge side of the front door is made wider than the other side, and the cut width is formed deeper. A small screw is screwed at the insertion end of the hinge shaft of the hinge mechanism that opens and closes the front door to prevent it from coming off. A retaining ring for wiring is also provided at several points on the back surface of the front door. further,
The rear plate provided on the main body side has a board housing portion projecting to the back side, and the board housing portion faces an additional board of a switching circuit mounted on the power supply board in a two-layer structure.

The front door rotates about the hinge shaft as a fulcrum and is opened at a large rotation angle according to the cutting depth of the cutting portion. When removing the front door, if the small screw is loosened and removed, the hinge shaft comes off and the front door is separated from the main body. In addition, the wires guided from the main body side are tied up with fasteners and belts and tied to the retaining ring so that they are neatly organized and not cluttered. Further, the additional board on the power board is cooled in the board housing portion having the ventilation hole, and the heating is suppressed.

[0015]

1 is an exploded perspective view showing the structure of the main part of a fire receiver to which the embodiment of the present invention is applied, FIG. 2 is a front view, and FIG. 3 is a rear view. 1-3, 1 is a fire receiver, 2
Is a box. A metal plate such as a steel plate is used for the box body 2 and is formed into a shallow rectangular box shape, and its disassembled structure is shown in FIG. Reference numeral 3 is a main body of the box body 2 and 4 is a front door.

Reference numeral 5 denotes a frame body which surrounds the periphery of the main body 3 in a rectangular shape, 6 is a back plate, 7 and 8 are wiring openings and mounting holes penetrating the back plate 6, and 9a and 9b are L-shaped in section. Upper and lower mounting rods, 1
Reference numeral 0 is a square hole, and 11 is a substrate housing portion (FIG. 3). Frame 5
Both sides of the upper, lower, left and right sides in the width direction are bent to the inside at a right angle, and a constant strength is given by the right angle component of the formed bent piece 5a. The back plate 6 is vertically arranged midway in the depth direction of the main body 3 by the mounting rods 9a and 9b.
A wiring room R1 having a shallow depth is formed on the back side of the internal space of the. The wiring for the power supply and the signal is once drawn from the wall surface to the wiring room R1 and then led to the accommodation room R2 inside. The board housing portion 11 projects into the wiring room R1 to the extent that it does not hit the wall surface when the fire receiver 1 is installed on the wall surface or the like, and a large number of ventilation holes 11a are provided on the projecting surface.

On the other hand, as shown in FIG. 4, the front door 4 is formed by bending each side of a rectangular metal plate in two steps at right angles to provide a depth in the depth. By the two-stage bending process, the front door 4 that is opened and closed by mounting the unit parts is given a further load bearing function. In particular, the bent piece 4b folded back on the opening / closing fulcrum side of the front door 4 (on the left side in FIGS. 1 and 4) is made wider than the other three sides and is given more strength.

Reference numerals 12 and 13 denote two large and small mounting holes provided on the front surface 4a of the front door 4, and 14 is provided on the left and right sides of the larger mounting hole 12 so as to partially widen the LCD. Light-blocking wall that prevents light from leaking to the outside, 1
Reference numeral 5 denotes a notched portion which is slightly deeply cut above and below the folded piece 4b of the front door 4, and d denotes a notched depth of the notched portion 15.
16 is a hinge mechanism of the front door 4, 17 is a plurality of retaining rings, 1
8 is a lock.

The hinge mechanism 16 includes an inner hinge 16a, an outer hinge 16b, and a hinge shaft 16c, each of which is formed by bending a plate material.
And a set screw 16d. As shown in FIG. 5, the inner hinge 16a is formed by bending a plate material slightly thicker than the outer hinge 16b, and has a U-shaped arm 16f having a cylindrical bearing 16e at its tip. The U-shaped arm 16f includes the bent piece 5a of the frame body 5 (main body 3) and the front door 4.
The inner hinge 1 is surrounded by the bent piece 4b (see also FIG. 6).
6a are fixed to the upper and lower sides of the inner wall on the main body 3 side. The outer hinge 16b is provided with two parallel plate-shaped bearings 16g with a cylindrical bearing 16e interposed therebetween.
It is fixed at position 5.

The cylindrical bearing 16e and the plate-shaped bearing 16g
The hinge shaft 16c is inserted with the hole of the same on the same axis, and the screw 16d is screwed into the insertion end to prevent the screw from being pulled out. On the other hand, the wires guided from the main body 3 to the front door 4 are bundled by a fastener made of resin or the like, and the bundle of wires is held by a holding ring 17 provided at several places with a margin (shown in the figure). Absent). And, the front door 4 is almost the bent piece 4
Within the angular range corresponding to the size of the cut depth d of b, the hinge shaft 16c can be rotated and opened and closed around the hinge shaft 16c as a fulcrum without hindering the bundle of wires.

Although the lock 18 is not shown in detail,
A lock shaft having a minus groove is loosely fitted in a cylindrical cylinder 18a protruding from the front door 4. Then, when the tip of an instrument such as a screwdriver is engaged with the minus groove in the cylinder and rotated, the inner holding plate 18b connected to the lock shaft is rotated by 90 degrees to open the front door 4. There is.
By adopting such a structure, the safety of the fire receiver as a public safety device is maintained.

Reference numeral 20 is a display operation unit. The display operation unit 20 is incorporated in the front door 4. Reference numeral 21 is a resin-molded unit board, and 22 and 23 are covers and membrane sheets. A cover 22 and a membrane sheet 23 are provided on the front surface of the unit board 21 to form an operation panel Pa including a display window and a touch switch.

Reference numeral 24 is a control board mounted on the back side of the unit board 21, 25 is an IC card, and 26 is an LCD (Liquid).
d Crystal Display) substrate, 27 is a speaker, and 28 is a synthetic resin insulating sheet. The control board 24 has many electronic parts corresponding to the display of the membrane sheet 23, and R
A microcomputer including an AM, a ROM and a CPU is mounted. Further, the insulating sheet 28 made of resin covers the back side of the display operation unit 20 to electrically and mechanically seal it. Reference numeral 36 is a speaker mounting portion, 37 is a sound passage groove, 38 is a filter, and 39 is a ring, and the speaker 27 is attached in an annular portion surrounding the sound passage groove 37 with the filter 38 and the ring 39 interposed.

Reference numeral 41 is a large-sized window hole provided in the unit board 21, and 42 is two medium-sized window holes. The large-sized window 41 is provided with the LCD board 26 for displaying menus and the like.
The area number and the like are numerically displayed in the display frame of the membrane sheet 23 by the LEDs mounted on the control board 24 in the one middle-sized window 42. Although not labeled, the unit panel 21 is also provided with a large number of small window holes, and each small window hole has a single L
It is used to display the color of the operating state by red or green facing the ED.

In addition to this, the unit board 21 is also formed with a large beak-shaped locking piece or a small locking piece, or a fixing projection into which a positioning protruding piece or a nut is inserted. Then, the control board 24, the LCD board 26, the speaker 27, and other unit components are positioned and attached to the rear surface of the unit board 21 by using the small locking pieces effectively and using the minimum number of screws. The unit board 21 having unit components mounted on the back surface and the operation panel Pa formed on the front surface is detachably mounted on the mounting hole 12 of the front door 4 using a large locking piece.

A printing unit 60 is provided below the front door 4. 61 is a synthetic resin case, 62 is a flange, 63 is an opening / closing lid, 65 is a chart feeding port, 6
6 is a feeder button (FIG. 2), and 68 is a lock claw that is elastically displaced. When the print unit 60 is inserted into the mounting hole 13, the elastic force causes the lock claw 68 to return to the normal state, and the peripheral front door 4 is clamped in the gap between the lock claw 68 and the flange 62, so that the print unit 60 is removed. It is automatically locked and installed. Then, a printing mechanism is built in the case 61, and the display data and the like on the LCD substrate 26 are printed and recorded on a roll chart.

Reference numeral 73 in FIG. 1 designates a handset which is hung from the rear plate 6 by a holder, 74 is a triangle type wiring duct whose left and right sides are open to a double door, and 75 is a power board. On the power supply board 75, a terminal block in which screw terminals are arranged stepwise, a fuse, and the like are attached. Further, as shown in FIG. 3, an additional board 75a, which is a printed board having a narrow mounting surface, is attached to the opposite surface of the power supply board 75 in a two-layer structure. A circuit that easily generates heat, for example, a constant voltage circuit is incorporated in the extension board 75a and faces the board housing portion 11 provided on the back plate 6 described above. 76 is a power transformer. 6 in FIG. 6 is the rotation angle of the front door 4.

An example of assembling the box 2 of the fire receiver of the present invention having such a configuration is as follows. For example, from the large steel plate to the mounting holes 12 and 13 by pressing.
The holes and contour shapes of the same are punched out to produce a master plate in which the front door 4 is developed in a plane. At this time, the bending piece 4b on the fulcrum side of the opening / closing operation is made wider than the other side, and the cutting depth d is selected to be a predetermined width. Four sides of the punched original plate are bent in two steps, and the left and right sides and the lower side of the mounting hole 12 are bent into an L shape. Similarly, the frame 5, the back plate 6 and the upper and lower mounting rods 9a, 9b
After punching, bend it. However, frame 5
Is subjected to a welding process for forming a frame.

Next, the inner hinge 16a and the outer hinge 16b, which are preliminarily processed using a plate material as shown in FIG. 5, are welded to the inner surface of the frame 5 and the front door 4. Further, the mounting rods 9a and 9b are welded to the upper and lower inner surfaces of the frame body 5, and the square hole 10 of the rear plate 6 is fixed and molded by projecting the board housing portion 11 toward the wiring chamber R1 side. After that, after installing the lock 18 in the mounting hole,
The front door 4 is openably and closably connected to the main body 3 by connecting the two pairs of the inner hinge 16a and the outer hinge 16b and inserting the hinge shaft 16c.

A screw 16d is screwed into the tip of the hinge shaft 16c to prevent it from coming off. Since it is retained by a small screw, the front door 4 can be easily removed and can be reused unlike the E-ring. The back plate 6 is fixed to the mounting rods 9a and 9b of the main body 3 with screws, and a wiring room R1 having a shallow depth is formed on the back side of the fixed back plate 6 and the box 2 is assembled. On the back plate 6 of the completed box 2, a holder for the handset 73, a wiring duct 74, a power transformer 76, an insulating plate 7
A power supply board 75 is attached together with the board 9 and the like. Power board 7
The additional board 75a protruding to the back of the
It is interposed in the internal space of the substrate housing portion 11 provided with 1a. The wiring room R1 requires a certain depth for wiring the signal line and the power supply line, but since these wirings do not occupy the entire wiring room R1, a dead space occurs. Therefore, in the present embodiment, the dead space of the wiring room R1 can be used to house a part of the substrate or the like in the receiver, and the inside of the receiver can be cleaned, and the box can be made thinner. Further, the heat generated by the additional board 75a is effectively dissipated from the ventilation hole 11a. Moreover, the heat-generating component can be stored separately from the other components in the board housing portion 11, and the influence of heat generation on other circuit components can be prevented.

On the other hand, as described above, the unit board 21 made of resin is integrally formed with the window hole 41 on the front surface and the locking piece 47, the mounting portion 36 and the like on the back surface. A membrane sheet 23 is provided on the front side of the unit board 2 which is integrally molded.
Is attached to form an operation panel Pa, and unit parts such as a control board 24, a speaker 27, and other alarm devices are effectively used by the locking pieces 47 on the rear surface side with a minimum number of fixing screws. It is attached. Then, the display operation unit 20 together with the printing unit 60 is installed from the front to the mounting hole 1 of the front door 4.
It is removably attached to 2 and 13.

Display operation unit 2 mounted on front door 4
The 0 and the printing unit 60 are connected to electronic parts such as the power supply board 75 in the main body 3 by a connector and connected to terminal equipment such as a fire detector, a repeater or a gas leak detector by a line.
As described above, the connecting wire bundle is held in order by being closely attached to the inner surface of the front door 4 by the holding ring 17. The fire receiver 1 configured as described above is installed in the wall surface of a disaster prevention center or the like with a mounting hole 8 and connected to a terminal device such as a fire detector, a repeater, or a gas leak detector by a line to form a disaster prevention system. Will be.

When a fire is reported by the detection signal of the fire detector in the monitoring area, the CPU mounted on the control board 24 of the display operation unit 20 controls based on the setting data stored in the ROM in advance. Output a signal. At the same time, the display of the fire status on the operation panel Pa of the display operation unit 20 and the sounding of the alarm device by the speaker 27 are executed, and the terminal device such as the smoke proof / smoke control device is controlled by a predetermined program in association with the fire. Countermeasures against gas leaks have been implemented.

When inspecting the inside of the fire receiver 1, the front door 4 is opened by inserting a driver or the like into the minus groove of the lock 18. When the door is unlocked and the free end of the front door 4 is pulled to the front, the front door 4 rotates around the hinge shaft 16c as a fulcrum and opens after the process shown in FIGS. 6 (a) to 6 (d). To be done. According to the configuration of the embodiment in which the notch 15 of the front door 4 is deep, the inspection work is performed by enlarging the rotation angle θ of the front door 4 while widening the width of the bending piece 4b and maintaining a certain strength. It's getting easier. In addition, it is aesthetically desirable to set the cutting depth d of the cut portion 15 so that the cut is not visible from the side of the box 2 when cutting to the end of the bent piece 4b.

In the above-mentioned embodiment, the case where the notch of the bent piece of the front door is deepened to increase the opening / closing angle is explained. However, the contact between the notch and the U-shaped arm is stopped by the stopper of the front door. It may be used for. Further, the configuration in which the additional board of the printed board for the constant voltage circuit is provided in the board housing portion is illustrated, but the electronic board is not limited to the printed circuit board as long as it is an electronic component that is easily affected by heat. Further, although the wire bundle of the front door is held by the holding ring having a substantially convex shape, it is sufficient to have a holding hole or the like, and the place and shape of the embodiment are not necessarily limited.

[0036]

According to the present invention, there is provided a metal body including a main body in which a rear plate forming a wiring chamber is mounted on the rear side and electronic components including a power supply substrate are accommodated therein, and a front door which is openably and closably held in the main body. In a fire receiver equipped with a box molded with a plate,
A fire receiver was constructed by providing a board housing on the back plate and projecting it toward the wiring room. In addition, a fire receiver was constructed in which electronic components having a high thermal influence mounted on a power supply board were exposed to the board housing. In addition, a fire receiver having a ventilation hole in the board housing was constructed.

Further, a box body composed of a main body and a front door both of which are molded from a plate material and formed with a bent piece along the opening / closing surface on the side of the opening / closing fulcrum side, and a cylindrical bearing at the tip are provided to fold the main body and the front door. In a fire receiver having an inner hinge forming a U-shaped arm surrounding a bent piece and a hinge mechanism including an outer hinge forming a plate bearing interposing a cylindrical bearing of the inner hinge, the fire receiver is surrounded by the U-shaped arm. We constructed a fire receiver that changes the opening and closing angle of the front door depending on the depth of cut in the bent piece on the front door side.

Further, a box body composed of a main body and a front door both of which are molded from a plate material and formed with a bent piece along the opening / closing surface on the side of the opening / closing fulcrum side, and a cylindrical bearing at the tip are provided to fold the main body and the front door. In a fire receiver including an inner hinge having a U-shaped arm surrounding a curved piece and a hinge mechanism including an outer hinge having a plate-shaped bearing interposing a cylindrical bearing of the inner hinge, a cylindrical bearing and a plate-shaped bearing are provided. A fire receiver was constructed with a retaining screw on the hinge shaft that is inserted.

Further, a box body comprising a main body having a rear plate attached thereto and containing electronic components including a power supply substrate therein, and a front door which is openably and closably held by the main body and has a display operation unit mounted in a front mounting hole. In the fire receiver provided with, a fire receiver having a retaining ring for holding a bundle of wires is provided on the inner wall surface of the box. Furthermore, a fire receiver that holds a bundle of wires arranged in the front door by means of a retaining ring was constructed.

As a result, since the heat-generating components are radiated by the board accommodating portion projecting into the wiring chamber on the back side along the installation surface of the fire receiver, the heat is generated while keeping the thickness of the box equal to the conventional one. It is possible to prevent malfunction due to. The board housing portion is only a part of the back plate that is processed, and the number of parts increases and the cost does not increase.

Also, the hinge mechanism is the actual open flat 3-86973.
Since there is no complicated polygonal hole like the shaft support structure described in Japanese Patent Publication, and the E-ring is not used for retaining, the structure is simple and the retaining screw can be used repeatedly, resulting in higher cost. You can hold things down. In particular, the rotation angle of the front door can be increased by a simple process of changing the cutting depth of the cut portion of the bent piece. In this case, since many wirings that connect the electrical components inside the box are held close to the inner wall surface by the retaining ring, they do not burden the opening and closing of the front door, and they are bundled and organized. This is convenient for checking the connection status. Further, the cut portion can also be used as it is as a stopper of the front door.

Therefore, according to the present invention, the number of parts is small, the manufacturing cost is low, the heat dissipation structure effectively utilizes the internal space, and there are various features such as no malfunction and easy assembly. A fire receiver can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a main part of a fire receiver according to an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a rear view of FIG. 1.

FIG. 4 is an exploded perspective view showing the configuration of the box of the embodiment of the present invention.

FIG. 5 is an exploded perspective view showing the vicinity of the hinge mechanism of the embodiment of the present invention in an enlarged manner.

FIG. 6 is an operation explanatory diagram of the embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which a door of a conventional fire alarm device is opened.

FIG. 8 is a cross-sectional view of a conventional fire alarm receiver.

[Explanation of symbols]

 1 Fire Receiver 2 Box 3 Main Body 4 Front Door 4a Front 4b Bending Piece 5 Frame 5a Bending Piece 6 Rear Plate 10 Square Hole 11 Board Storage 11a Vent 12, 13 Mounting Hole 15 Notch 16 Hinge Mechanism 16a Inner hinge 16b Outer hinge 16c Hinge shaft 16d Set screw 16e Cylindrical bearing 16f C-shaped arm 16g Plate bearing 17 Holding ring 18 Lock 20 Display operation unit 22 Cover 23 Membrane sheet 24 Control board 26 LCD board 60 Printing unit 73 Handset 75 Power supply board 75a Additional board Pa Operation panel R1 Wiring room R2 Storage room d Depth of cut θ Rotation angle

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H02B 1/38 1/20 N H05K 5/03 B 7362-4E

Claims (7)

[Claims] 1. A main body in which a back plate that forms a wiring chamber is attached to the back side, and an electronic component including a power supply board is housed therein,
A fire receiver comprising a box formed of a metal plate composed of a front door that is openably and closably held in the main body, wherein the rear plate is provided with a substrate storage part and protrudes toward a wiring chamber. Fire receiver. 2. The fire receiver according to claim 1, wherein an electronic component having a high thermal influence mounted on the power supply board is made to face a board housing portion. 3. The fire receiver according to claim 1, wherein the board housing portion is provided with a ventilation hole. 4. A box body composed of a main body and a front door, both of which are molded from a plate material and formed with a bent piece along the opening / closing surface on the side of the opening / closing fulcrum side, and a cylindrical bearing is provided at the tip of the main body and the front door. A fire receiver comprising an inner hinge formed with a U-shaped arm surrounding a bent piece and a hinge mechanism including an outer hinge formed with a plate-shaped bearing interposing a cylindrical bearing of the inner hinge, wherein the U-shaped arm comprises: A fire receiver characterized in that the opening and closing angle of the front door is changed by the cutting depth of the cut portion of the bent piece on the side of the enclosed front door. 5. A box body composed of a body and a front door, both of which are molded from a plate material, and a bent piece along the opening / closing surface is formed on the side of the opening / closing fulcrum side, and a cylindrical bearing is provided at the tip of the body and the front door. A fire receiver comprising an inner hinge formed with a U-shaped arm surrounding a bent piece and a hinge mechanism including an outer hinge formed with a plate bearing interposing a cylindrical bearing of the inner hinge, wherein the cylindrical bearing and the plate are provided. A fire receiver characterized in that a hinge shaft, which is inserted into the roller bearing, is provided with a retaining screw. 6. A box including a main body having a rear plate attached thereto and containing electronic components including a power supply board therein, and a front door which is openably and closably held by the main body and has a display operation unit mounted in a front mounting hole. A fire receiver including a body, wherein a retaining ring for retaining a bundle of wires is provided on an inner wall surface of the box. 7. The fire receiver according to claim 6, wherein the holding ring holds a wire bundle arranged in the front door.