JP3716351B2 - Fire detector removal device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a fire detector, and more particularly, to a preparative disconnect device attached fire detector to rectangular opening provided in the mounting to the strip-shaped opening and the ceiling plate formed in a system ceiling .
[0002]
[Prior art]
In recent years, the construction industry has created a flat interior design with few protrusions by using a beam member with a special unit structure on the ceiling of a high-rise building or the like. A metal beam called “T-bar” is used for the beam member of the unit structure. “T-bars” are connected in a reverse T-shape with an interval in pairs. A ceiling plate is placed on the overhanging portion of the inverted T-shape of a plurality of beam members in which “T bars” are connected in a pair structure, and a strip-shaped opening formed between the inside overhanging portions is usually It is opened as it is and used as an exhaust or ventilation passage.
[0003]
FIG. 23 is an explanatory diagram showing the configuration of a conventional exposed fire detector attached to the ceiling plate of the system ceiling.
In FIG. 23, 101 is a ceiling hole drilled in the ceiling plate 102, and 103 is a wiring such as a power / signal line. Reference numeral 104 denotes a cylindrical fire detector body having a cylindrical smoke detector 105 therein, and 106 denotes an insect repellent wire net provided at the smoke inlet of the main body 104. Reference numeral 107 denotes an exposed base for attaching the main body 104 to the ceiling plate 102 side, and is fixed to the ceiling plate 102 by fixing means (not shown) such as screws, bolts and nuts.
[0004]
In the conventional fire detector configured as described above, smoke flowing in the horizontal direction along the ceiling surface flows into the smoke detector 105 from the smoke inlet of the main body 104 via the wire mesh 106, and a fire is detected. It has become so.
[0005]
[Problems to be solved by the invention]
By the way, in order to make the ceiling surface as clean as possible, it is required to reduce the size of the fire detector. In particular, in the case of the above-described system ceiling that has recently been put into practical use, Installing a cylindrical fire detector with a hole has a problem that goes against the idea of a system ceiling that makes the ceiling surface as clean as possible.
[0006]
The present invention has been made to solve such conventional problems, the exposed portion is small size cuboid shaped ceiling surface, yet a suitable fire sensor particularly to a system ceiling design surface or design surface An object of the present invention is to provide a removal device for removing the ceiling surface .
[0007]
[Means for Solving the Problems]
A fire detector detaching apparatus according to the present invention includes a stepladder-shaped fixing member straddling a mounting opening provided on a ceiling, and a hook piece locked to the opening by the fixing member. and attached mounting member to a body of the parallelepiped type fire detector to be mounted on said mounting member, for fixing said body to extractable to the contact surface between the outer wall and the inner wall of the mounting member of the body fixed In the mounting structure of the fire detector, the arm being inserted between the contact surfaces of the main body and the mounting member and releasing the locking of the fixing means, and fixed to the released fixing means A hooking claw, and a substantially U-shaped puller for pulling out the main body mounted on the mounting member from the mounting member .
[0011]
[Action]
To remove the main body of the fire detector from the mounting member, a U-shaped extractor is used. Insert the open arm of the extractor into the gap on both sides of the body. When the arm is inserted into the gap, the tip of the arm cuts between the spring plate and the drop portion to push the spring plate apart. When the arm is further advanced, the two claws inside the arm drop into the drop-in portion, and if the puller is pulled out as it is, the main body is held by the puller and is automatically removed.
[0016]
【Example】
Example 1.
Embodiments of the present invention will be described below with reference to the drawings.
1 is a diagram for explaining the configuration of Embodiment 1 of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a rear view of FIG. 1, FIG. 4 is a bottom view of FIG. It is sectional drawing which shows an assembly | attachment state. In the embodiment of the present invention, there are many components including a fire detector mounting device, and the structure and arrangement of the main body of the detector are not common to the above-described devices. To explain.
[0017]
1 to 5, reference numeral 1 denotes a system ceiling, and 11 denotes the above-described T bar. As shown in the figure, the T bar 11 is composed of a vertical flange portion 12 and a horizontal flange portion 13, and a long molding material having a substantially T-shaped cross section obtained by drawing a light metal alloy such as aluminum is used. Two T-bars 11 are arranged in an inverted T shape with a strip-shaped opening 14 having a constant width of 25 mm (or 19 mm or 12.5 mm, etc.), and are connected in a pair structure with a bracket (not shown). Is configured.
[0018]
Each beam member 10 in which the T-bars 11 are combined in a pair structure is vertically arranged at a uniform height in a ceiling space in a row from a roof set, a floor beam on an upper floor, or the like, using a vertical flange 12. . A ceiling-mounted ceiling plate 15 is placed and held on a horizontal ridge 13 that protrudes in the horizontal direction between adjacent rows of the beam members 10 that are suspended.
[0019]
Reference numeral 2 denotes a fixing member. A metal plate is used as the material of the fixing member 2 and is punched into a rectangular frame as shown in FIG. After punching, it is bent in two stages at the position of the one-dot chain line, leaving a slight flat portion at the center of the two long sides. As a result, a stepladder-shaped fixing bracket 20 as shown in FIG. 7 is formed by projecting a pair of stepladder pieces 21 and 22 that are coupled to each other at the short side on the opposite short side. Reference numerals 23 and 24 denote top portions of the fixing bracket 20, and reference numerals 25 and 26 denote screw holes formed by burring on both top portions 21 and 22. The screw holes 25 and 26 are provided with the two fastening screws 27 and 28 shown in FIGS. Screwed together.
[0020]
In addition, 31 and 32 are legs of the fixing bracket 20, 33 and 34 are legs that are bent inward at the lower ends of the legs 31 and 32, and 35 and 36 are legs when the bracket-shaped punching hole is bent. It is a stop piece formed on the extended surface of the parts 31 and 32. An elastic force is applied to both leg portions 31 and 32 opened in a stepladder shape, and when a pressing force is applied from both sides, the normal interval between the foot portions 33 and 34 is reduced. The fixing bracket 20 is straddled on the left and right lateral ribs 13 across the opening 14 of the system ceiling 1 in a state where the pair of stepladder pieces 21 and 22 keeps a normal interval (see FIG. 1).
[0021]
Reference numeral 4 denotes a mounting member serving as a base for mounting the fire detector on the ceiling 1. In this embodiment, the mounting member 40 is configured by using all metal materials for the mounting member 4. The mounting bracket 40 includes a gate-shaped holding frame 41 having a U-shaped upper side and left and right sides as shown in FIG. 8, and a frame obtained by extruding the body part with a slightly thin plate material leaving a collar part. A frame 42 and two spring-shaped spring plates 43 are provided.
[0022]
The spring plate 43 is fixed to the left and right short sides of the frame frame 42 by spot welding with the arc portion protruding inward, and the frame frame 42 is integrally fixed to the opening end of the holding frame 41 by the same means. The mounting bracket 40 with the 43 portion fixed integrally is provided with a flange 44 at the open end and is formed in a reverse U-shaped longitudinal section, and a rectangular tubular mounting chamber 45 is formed inside. On both sides of the entrance of the mounting chamber 45, the arc portion of the spring plate 43 is exposed.
[0023]
40a is a burr hole penetrating the upper side of the mounting bracket 40, 40b is an upright mounting piece having a burring screw hole, 40c is an L-shaped hinge hole, and 40d and 40e are a pair of differences formed in the left and right shoulders. The insertion hole and the locking hole 40f are small semicircular signs formed on the flange 44 on the bottom surface (frame frame 42). Reference numeral 40g denotes bent pieces on both sides of the U-shape of the mounting bracket 40 (holding frame 41), and reference numeral 40h denotes an upper side cut-out portion.
[0024]
The bent piece 40g is made to have different widths (W1> W2) on the front side and the back side. Both the bent pieces 40g and the signs 40f having different widths indicate the directionality when the main body of the fire detector described below is inserted into the fixing bracket 20. Based on the suggestion of directionality by the bent piece 40g and the sign 40f, the mounting of the main body in the forward direction is guided and the mounting in the reverse direction is prevented.
[0025]
Reference numeral 5 denotes a terminal mechanism, and 5a to 5c denote three sets of input / output wirings. The terminal mechanism 5 is provided in the upper part of the mounting bracket 40 as shown in FIGS. 1 to 3 and connected to the wires 5a to 5c drawn from the back of the ceiling. 9, 50 is a terminal block of the terminal mechanism 5, 51 is a printed board, 52 and 53 are connection terminals and connector plugs fixed to the printed board 51 and electrically connected by soldering on the back side, and 54 is a terminal cover. is there.
[0026]
The terminal block 50 and the terminal cover 54 are made of the same color synthetic resin, and the connection terminal 52 is connected to the common line, the signal line, and the test line input / output terminals, which are color-coded red, blue and white, respectively, to cause incorrect connection. Is prevented. Then, the terminal block 50 is overlapped with the printed board 51 and the two screws 55 inserted into the left and right mounting holes 50a and 51a (FIG. 5) are screwed into the screw holes of the mounting piece 40b to connect the upper side of the mounting bracket 40. It is fixed upright. The connector plug 53 integrated with the fixed printed board 51 has a plurality of plug pins standing in front of the screen piece from the cutout portion 40h of the holding frame 41 toward the inside of the mounting bracket 40.
[0027]
Further, the terminal cover 54 is attached to the mounting bracket 40 so that the hinge shaft 54a provided on the bottom surface portion is fitted into the hinge hole 40c, and the hinge shaft 54a can be rotated about the fulcrum (see FIGS. 5 and 9). ). When the terminal cover 54 is rotated to cover the connection terminal 52 and the like, the claw piece 54b inside the terminal cover 54 falls into the recess 50c of the terminal block 50, and the terminal cover 54 is locked. In the locked state of the terminal cover 54, a gap 5d is provided between the surface of the upper side of the terminal block 50 and the inner surface of the upper side of the terminal cover 54, and the input / output wirings 5a to 5c are led out through this gap.
[0028]
6 is a main body of the fire detector. Reference numeral 60 denotes a case of the main body 6, which is formed of a synthetic resin in a substantially rectangular parallelepiped shape having a small outline shape as shown in FIGS. The case 60 includes a main case 61 with a lid and no bottom and a secondary (auxiliary) case 62 with a bottom without a lid. The main case 61 is further divided into two parts, a slightly deeper front case 63 and a shallow back case 64. The front case 63 and the back case 64 are fitted from the front and back and fixed with two screws 61a (see FIG. 3), and the sub case 62 is fitted to the bottom so that the openings of the main and sub cases 61 and 62 protrude from each other. Are combined. Incidentally, if the dimensions of the main body are shown, the length, width and thickness are 11 × 6 × 2.4 (cm), respectively.
[0029]
61b is a drop portion of the main case 61, and 61c is a sliding portion. The drop-in portion 61b is provided opposite to the spring plate 43 at the entrance of the mounting chamber 45, and is formed on both side surfaces of the joined main case 61. The width of the sliding portion 61c is formed by cutting off the ridges formed at the four corners on the outer side of the main case 61 at right angles, and the front side is W1 corresponding to the bent pieces 40g of the mounting bracket 40 having different widths. The side is W2. 61d is a fitting portion formed by a stepped portion at the opening end of the main case 61 and into which the sub case 62 is fitted, and 61e (not shown) is a thick portion provided in the center of the fitting portion of the front case 63.
[0030]
In FIG. 11 (a), 63a is a connector chamber surrounded by a U-shaped wall 63b in the front case 63, 63c is two female screw studs, 63d is an arcuate wall, 63e is a C-shaped wall, and 63f is It is a key-shaped piece protruding at the bottom. Both the U-shaped wall 63b and the arcuate wall 63d are provided with long rectangular vent holes 63g and 63h at the center. Then, the smoke conveyed to the air flow flowing into the main body 6 from below is rectified into the square-shaped wall 63e and the arcuate wall 63d and flows out to the outside through the vent holes 63h and 63g. As a result, an air flow containing smoke is induced near the center of the optical bench, which will be described later, and the smoke detection of the main body 6 of the fire detector is effectively performed.
[0031]
In FIG. 11 (b), 64a is a connector chamber surrounded by a parallel wall 64b in the back case 64, 64c is two hollow stepped studs, and 64f is a key-shaped piece projecting to the bottom. The portion corresponds to the connector chamber 63a on the front case 63 side. 64g is a narrow vertical groove formed on both sides of the back case 64, 64h is a step provided on the inside of both sides, 64i is a through-hole provided on the back for testing and adjustment, and 64j Are two positioning pins. Further, 64k is a bottom wall that is the same height as the stepped portion 64h along the opening side, and 64m is a drain outlet provided in the bottom wall 64k. The step 64h and the bottom wall 64k reinforce the synthetic resin case 64 in addition to positioning. In particular, the bottom wall 64k makes the opening of the deep box-shaped case 64 robust.
[0032]
The arrangement state of the storage components inside the main case 61 is shown in FIGS.
65 is a printed circuit board on which electronic components are mounted, 66 is a connector socket, 67 is an optical table, 68 is a thin plate-shaped optical table cover, 69 is an insect screen, 70 is a display lamp that is connected to the printed circuit board 65 and hangs down. (Confirmation light). The printed circuit board 65 is set inside the back case 64 with a gap on the back side by a hollow stepped stud 64c, a stepped portion 64h and a positioning pin 64j.
[0033]
The set printed circuit board 65 divides the internal space of the case 60 into two chambers. By dividing the internal space of the printed circuit board 65, the mounting chamber 72 containing the electronic components on the back side is isolated from the detection chamber 71 on the front side. In addition, the connector socket 66 on the printed circuit board 65 in the set state is accommodated in the connector chamber 64a so as to face the plug pin of the connector plug 53 that stands on the connector socket along the guide plate.
[0034]
Further, the optical bench 67 and the optical bench cover 68 are formed of a black resin and are structured so as to be combined into a cylindrical shape by pins (not shown) of the optical bench cover 68. Inside the cylindrical optical stand 67, a large number of Y-shaped and J-shaped light shielding pieces 67a are provided in the peripheral portion, and a light projecting element 67b and a light receiving element 67c (both accurate display is omitted). ) Is also designed.
[0035]
The inside of the optical bench 67 forms a so-called labyrinth structure so that only smoke generated by a fire can be circulated by blocking external light. In particular, when the fire detector is mounted on the ceiling 1 of the main body 6, the light projecting / receiving elements 67b and 67c are set to be positioned above the horizontal plane passing through the cylindrical axis. With the arrangement of the light projecting / receiving elements 67b and 67c, the detection sensitivity is prevented from being lowered by dust adhering to the lens surface on the optical axis.
[0036]
On the other hand, in the secondary case 62, 62a is an elongated rectangular smoke flow inlet penetrating the side wall, 62b is a parallel partition at the center of the interior, 62c and 62d are six ventilation chambers r1 to r6 that are arranged in the left and right spaces of the parallel partition 62b. [Fig. 10, Fig. 11 (c)]. Further, 62e is a display window provided near the long side in the parallel partition 62b, and 62f is a projection having a stepped portion at the back side with an inclination on the opening side. Two smoke inlets 62a are provided on the long side walls, and one on each short side wall, and each of these smoke inlets 62a corresponds to the ventilation chambers r1 to r6.
[0037]
The Y-shaped partitions 62c and 62d share the function of rectifying the airflow flowing into the ventilation chambers r1 to r6 in the same manner as the above-described C-shaped wall 63e. Reference numeral 62g denotes a narrow gap formed between the front ends of the partitions 62b to d and the four side walls on the front, rear, left and right sides, and 62h and 62i denote a fitting part and a thin part. The sub case 62 incorporates an insect screen 73 that also serves as a dust proof. A developed view of the insect screen 73 and the insect screen 69 is shown in FIG. Insect nets 69 and 73 A film-like metal such as stainless steel with a thickness of about 0.1 mm is used, and a circular hole 62j of about 0.6 mmφ is formed in the two-dot chain line in FIGS. Each row is perforated in multiple rows and multiple rows with a shift of approximately the radius.
[0038]
Reference numeral 69a denotes a connection cut provided symmetrically in the width direction at both ends of the insect screen 69, and 73a denotes a large or small L-shaped or square notch formed on the side of the insect screen 73. An insect repelling net 69 that has a ring shape intersecting the notch 69 a surrounds the circumferential surface of the optical bench 67. On the other hand, the insect repellent net 73 incorporated in the sub case 62 is overlapped with notches 73a at both ends of the extra length in the vicinity of the projection 62f and inserted along the side wall in the gap 62g and is prevented from being pulled out by the projection 62f. Is done.
[0039]
The two-stage insect nets 69 and 73 shut out minute insects, especially in summer when the seasonal pattern occurrence rate is high, so that no false alarms can be generated. The sub case 62 in which the insect net 73 is assembled in the gap 62g is detachably fitted to the bottom of the main case 61 containing the printed circuit board 65 and the optical stand 67.
[0040]
When the sub case 62 is fitted, the protrusion 62f is locked by being locked to the key-shaped pieces 63f and 64f of the main case 61. At the same time, the indicator lamp 70 is faced in the window frame of the display window 62e. At this time, the correctness of the fitting operation is determined from the biased position of the display window 62e and the correspondence between the thick part 61e of the front case 63 and the thin part 62i of the sub case 62, and the same function as the above-described sign 40f is managed. . The case 60 in which the main case 61 and the sub case 62 are combined is closely fitted at all joints, and leakage from the side of the airflow flowing in from the smoke inlet 62a and rising up the vertical air passage is designed. Is designed to be equally configured.
[0041]
The assembly operation and the like of the fire detector according to the embodiment of the present invention having the above-described configuration will be described with reference to FIGS.
Assume that the main body 61 of the fire detector as shown in FIG. 10 is configured by previously connecting the sub case 62 to the bottom of the main case 61 in which the printed circuit board 65 and the like are assembled. A detection unit including an optical bench 67 and an optical bench cover 68 is formed in the detection chamber 71 on the front surface, and a chip component mounted on the printed circuit board 65 is accommodated in the mounting chamber 72 on the rear surface. Further, an input / output terminal mechanism 5 is also fixed to the upper portion of the mounting bracket 40 (FIGS. 1 to 3 and 5).
[0042]
The mounting bracket 40 to which the terminal mechanism 5 is fixed is inserted from the side of the terminal mechanism 5 between the legs 33 and 34 of the fixing bracket 20 that is opened like a stepladder. The fastening screws 27 and 28 are inserted from the inside into the fool holes 40a and 40a of the mounting bracket 40, and only the screw ends are slightly screwed into the screw holes 25 and 26 of the stepladder pieces 21 and 22, respectively. The mounting bracket 40 to which the terminal mechanism 5 is attached by screwing only the screw tip is temporarily attached to the inside of the leg portions 31 and 32 of the fixing bracket 20 with some backlash.
[0043]
In the temporarily assembled state, the mounting bracket 40 in which the tightening screws 27 and 28 are passed through the fool holes 40a and 40a can freely move within the range of the screw portion where the screwing is left.
Accordingly, the fixing bracket 20 is pressed against the mounting bracket 40 side while pressing the opened spring leg portions 31 and 32 from both sides to narrow the interval. The tips of the legs 33 and 34 of the fixed metal fitting 20 thus pressed fit into the frame frame 42, and the stop pieces 35 and 36 come into contact with the frame frame 42 to stop the insertion. Then, by inserting the tips of the legs 33 and 34, the state where the distance between the legs 31 and 32 is contracted and thinned as shown in FIG.
[0044]
On the other hand, when the above-described temporary mounting of the mounting bracket 40 to the fixing bracket 20 is finished, the input / output wirings 5a to 5c are pulled out from the opening 14 of the system ceiling 1. The exposed core wires of the drawn wires 5a to 5c are connected to the connection terminals 52 of the terminal block 50 by opening the terminal cover 54 as shown in FIGS. Since the terminal block 50 is displayed by color according to the signal line, connection work is easy and there is no fear of incorrect connection. The terminal cover 54 is raised in the direction of the arrow and locked with a pair of claw pieces 54b and a recess 50c.
[0045]
Here, the fixing bracket 20 and the mounting bracket 40 in a state where the wiring is completed and held in the thin width are inserted into the opening 14 of the system ceiling 1 from the floor surface side. When the flange 44 of the mounting bracket 40 comes into contact with the T-bar 11 and is inserted to the back, and the fixing bracket 20 is pushed up, the fixing bracket 20 expands the leg portions 31 and 32 and returns to the normal interval by the play of temporary assembly. . The state of both the metal fittings 20 and 40 at this time is shown in FIG.
[0046]
After inserting the fixing bracket 20 and the mounting bracket 40, a slightly long screwdriver is inserted from below, and the two tightening screws 27 and 28 are tightened. By tightening the tightening screws 27 and 28, the mounting bracket 40 is attached to the system ceiling 1 by opening the mounting chamber 45 to the floor side by the fixing bracket 20 straddling between the T-bars 11 of the pair structure. Thereafter, the main body 6 of the fire detector is inserted into the mounting chamber 45 of the mounting bracket 40 from the main case 61 side. In this case, as described above, the bent pieces 40g and the signs 40f having different widths teach the insertion direction of the main body 6, so that there is no fear of erroneous insertion even in the dark.
[0047]
In this way, the main body 6 of the rectangular parallelepiped fire detector is mounted in the opening 14 of the system ceiling 1. In a similar operation, fire detectors in the same hierarchy are installed on the system ceiling 1 for each monitoring area. And the fire detector group attached to the system ceiling 1 of each hierarchy is connected to the fire receiver installed in the monitoring room for each line via wiring 5a-5c, respectively.
[0048]
When a fire occurs, the heated smoke rises indoors and flows into the ventilation chambers r1 to r6 from each smoke inlet 62a of the fire detector 6 attached to the opening 14 of the system ceiling 1. Smoke that has flowed into the ventilation chambers r1 to r6 rises through the vertical Y-shaped partition and rises up the ventilation path that cuts through the detection chamber 71 without interfering with each other, and is discharged to the outside. The rising smoke is guided toward the center of the labyrinth of the optical bench 67 provided in the detection chamber 71 under the influence of the C-shaped wall 63e and the arcuate wall 63d projecting from the left and right in the middle of the air passage.
[0049]
On the other hand, the light projecting element 67b in the optical bench 67 is periodically pulsed. Then, the light projected from the light projecting element 67b is scattered according to the concentration of the smoke that flows in, and the light receiving element 67c detects this scattered light. The detection signal of the light receiving element 67c is amplified by an electronic circuit on the printed circuit board 65, and when the smoke concentration exceeds a set value, it is sent to the receiver via the wirings 5a to 5c. As a result, the fire area is displayed, and alarms provided in various places in the house are sounded to notify the occurrence of the fire. At the same time, the indicator lamp 70 is turned on, and the fire detector activated by the fire can be viewed through the display window 62e.
[0050]
Also, during regular maintenance and inspection, a tester for alarming called a smoke tester is used.
In FIG. 15, 86 is a tester, 86a is a surrounding cylinder of the tester 86, 86b is a generating part provided in the surrounding cylinder 86a, and 86c is a gripping rod. The surrounding tube 86a is formed in a square tube shape, and a test hole 86d that matches the contour shape of the main body 6 of the fire detector is provided on the upper surface.
[0051]
When the alarm test is performed, the exposed smoke inflow portion of the main body 6 attached to the system ceiling 1 is covered with the test hole 86d of the tester 86. Then, for example, by operating the switch of the gripping rod 86c, pseudo smoke is generated inside the enclosing cylinder 86a via the generator 86b, and the alarm test is performed. Although FIG. 15 shows a rectangular tube-shaped envelope, a cylindrical envelope may be used. Further, as shown in FIGS. 16A and 16B, cap-shaped adapters 87 and 88 are used in the conventional cylindrical envelope. 87a in the figure (a) is a rectangular test hole provided in the adapter 87, and 88a in the figure (b) is a pair of closing claws formed in the adapter 88. The gap between the pair of closing claws 88a is made slightly wider than the width of the long side of the frame 42 so as to close the openings 14 on both sides of the system ceiling 1. The adapters 87 and 88 make it possible to use a conventional cylindrical shape as it is for testing the system ceiling 1.
[0052]
When it is necessary to remove the main body 6 as a result of the inspection, the exposed portion of the main body 6 of the fire detector is picked and pulled down. Then, depending on the concave-convex fitting structure, the engagement between the spring plate 43 and the drop-in portion 61b is released, and the main body 6 can be manually pulled out from the mounting chamber 45. The main body 6 removed from the mounting chamber 45 is disengaged from the projection 62f and the key pieces 63f and 64f, and the sub case 62 is removed from the main case 61. Furthermore, if one or two screws 61a are loosened, the main case 61 is separated into a front case 63 and a back case 64, and the inside is easily disassembled. The disassembled optical bench 67, insect screen 69, etc. are maintained, and the printed circuit board 65 is inspected for electronic circuits.
[0053]
If necessary, a U-shaped hard resin puller 9 as shown in FIG. 17 is used for removal. The width W of the open arm 91 of the extractor 9 is made substantially equal to that of the main body 6. The arm 91 is inserted into the gap between the side surfaces of the main body 6 and the mounting chamber 45 while somewhat expanding the space between the tips. When the arm 91 is inserted into the gap, the tip of the arm 91 cuts between the spring plate 43 and the drop-in portion 61b and pushes the spring plate 43 apart. When further advanced, the two hooking claws 92 inside the arm 91 drop into the drop portion 61b and stop. If the extractor 9 is pulled out as it is, the main body 6 is held by the extractor 9 and automatically removed.
[0054]
In the unlikely event that the rain leaks in the attic or on the upper floor, water drops from the ceiling of the system ceiling 1 may be transmitted to the wirings 5a to 5c. However, when the cover 54 of the terminal mechanism 5 is rotated and covered with the hinge shaft 54a as a fulcrum, the flexible wires 5a to 5c are pressed against the terminal block 50 and automatically bent at right angles or acute angles at the outlet ( FIG. 1). For this reason, the water drops transmitted to the wirings 5a to 5c fall directly to the floor surface from the bent portions. Therefore, water droplets transmitted to the wirings 5a to 5c do not enter the main body 6 of the fire detector. Even if a water droplet enters the mounting chamber 72, the intruded water is discharged from the drain port 64m.
[0055]
Modification 1
In the above description, the case where the stepladder pieces 21 and 22 of the fixing bracket 20 are integrated is described, but a modification of the fixing bracket is prepared. In the modified example, the configuration different from the above is the fixing bracket 20 for fixing the mounting bracket 40, and different structures are shown in FIGS.
As shown in FIG. 18, in the modified example, the fixing bracket 20 is configured by a pair of divided stepladder pieces 21 and 22. The divided stepladder pieces 21 and 22 are somewhat changed in shape to form U-shaped holding portions 21a and 22a whose top portions 23 and 24 are narrowed and opened downward. Further, the screw holes 25 and 26 of the top portions 23 and 24 of the stepladder pieces 21 and 22 are replaced with the fool holes 25a and 26a.
[0056]
In order to connect the separated stepladder pieces 21 and 22 to the mounting bracket 40, a connecting bracket as shown in FIG. 19 is provided.
Reference numerals 81 and 82 denote a pair of connecting metal fittings, and 83 and 84 denote a thumbscrew with a pinch. The connecting fittings 81 and 82 are bent into a U-shape similar to the sandwiching portions 21a and 22a of the stepladder pieces 21 and 22, and are sized to be inserted slightly between the sandwiching portions 21a and 22a [FIG. 18 (a)].
[0057]
Reference numeral 81a denotes a screw hole provided at the top of the connection fitting 81, and reference numerals 81b and 81c denote stopper arms and stopper claws provided on both side surfaces. The stopper arm 81b and the stopper claw 81c prevent the connection fitting 81 from rotating and withdrawing, and are provided corresponding to the insertion hole 40d and the locking hole 40e of the mounting fitting 40. 82a is a screw hole provided at the top of the other connecting fitting 82, and 82b and 82c are stopper arms 82b and stopper claws 82c provided on both side surfaces.
[0058]
In the modified example of such a configuration, first, the mounting bracket 40 is inserted into the opening 14 of the system ceiling 1 from the floor surface side, and the upper part protrudes from the ceiling. A pair of stopper arms 81b and stopper claws 81c are inserted into the insertion hole 40d and the locking hole 40e of the mounting bracket 40 protruding from the ceiling while the connecting bracket 81 is slightly inclined. With the insertion of the stopper arm 81b and the stopper claw 81c, the connecting fitting 81 is connected to one shoulder portion of the mounting fitting 40 by protruding in the horizontal direction. The clamping portion 21a is fitted from above so as to sandwich the coupled fitting 81, and then a thumbscrew 83 is passed through the fool hole 25a and a part of the tip is screwed into the screw hole 81a of the coupling fitting 81. Tighten.
[0059]
Similarly, when the other thumbscrew 84 is temporarily tightened, the separation type fixing bracket 20 is preliminarily assembled to the mounting bracket 40. Then, the thumbscrews 83 and 84 are tightened in a state where the leg portions 31 and 32 of the stepladder pieces 21 and 22 are straddled on the opening 14. When the thumbscrews 83 and 84 are alternately tightened, the side edges of the opening 14 are pinched by the flanges 44 of the mounting bracket 40 and the legs 33 and 34 at the lower ends of the legs 31 and 32 of the fixing bracket 20 in the same manner as in the first embodiment. Is done. As described above, in the modified example, the mounting bracket 40 is fixed to the system ceiling 1 with a tightening operation on the back side of the ceiling. The mounting bracket 40 has a feature that it can be shared between an integrated type and a separated type of the stepladder pieces 21 and 22.
[0060]
Modification 2
In FIGS. 20A and 20B showing the second modification, reference numeral 85 denotes a shielding plate. Although the shielding plate 85 is rectangular, a square hole into which the main body 6 is inserted is provided at the center, although not shown in the drawing. The shield plate 85 is fitted into the square hole from the front before the fixing bracket 20 and the mounting bracket 40 are assembled. When the mounting bracket 40 is attached to the system ceiling 1 by a fixing bracket, the shielding plate 85 is fixed to the ceiling surface by being sandwiched between the flange 44 and the T bar 11.
[0061]
The left and right openings 14 of the main body 6 of the fire detector are closed by the shielding plate 85 fixed to the ceiling surface. The smoke generated at the time of the fire intensively flows into the detection chamber 71 from the smoke inlet 62a, and the ignition can be detected promptly and with high sensitivity. Reference numeral 85a in FIG. 1 (a) denotes an engagement piece for elastically engaging the shielding plate 85 with the T-bar, and is provided so as to protrude from the back side of the shielding plate 85. Since the engagement piece 85a is provided, the shielding plate 85 is attached in close contact with the ceiling surface without any gap. FIG. (B) is a modification of the shield 44 (shielding piece) 85 integrated with the collar piece 44 of the mounting bracket 40.
[0062]
Application Example In another application example of the present invention, unlike the description in Example 1, the main body 6 of the fire detector has a finite long side instead of the infinite band-shaped opening 14 formed in the system ceiling 1 described above. It is attached to a rectangular opening.
[0063]
The configuration of the application example is shown in FIGS. 21 and 22.
Reference numeral 16 in FIGS. 21 and 22 denotes a rectangular opening for mounting the main body 6 of the fire detector. The opening 16 has a slightly larger outline shape than the transverse cross section of the mounting bracket 40, and is provided in the ceiling plate 15, for example. Since other configurations of the mounting bracket and the like are the same as those described above, re-explanation is omitted.
[0064]
In each of the embodiments of the present invention described above, the case where the fire detector is attached to the ceiling has been described as an example. However, the present invention can also be applied to a side wall other than the ceiling. Further, although the case where metal is used for the material of the fixing member and the mounting member has been described, it is also possible to use a synthetic resin member in which a nut, a leaf spring, or a reinforcing metal thin plate is insert-molded.
[0065]
Furthermore, the fire detector that detects the occurrence of a fire based on the change in the amount of light received by the light-receiving element associated with the reflected light of smoke generated during a fire inside the labyrinth has been explained, but the resistance change of the semiconductor accompanying the generation of heat during a fire A fire detector using the above may be used, and the material and shape of other parts are not necessarily limited to those in the embodiments.
[0066]
【The invention's effect】
Removal device of fire detector according to the present invention, mounted solid with a constant member which is straddled on the opening for mounting provided in the ceiling, on the ceiling engages the flange piece to the opening by the fixed member A mounting member, a rectangular parallelepiped fire detector body mounted on the mounting member, and a fixing means for removably fixing the body to a contact surface between the outer wall of the case and the inner wall of the mounting member. In the fire detector mounting structure provided with a pull-out device for releasing the locking means of the main body mounted on the mounting member from the mounting member, it is easy to use without using a step The main body can be removed, and handling is convenient and less dangerous.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an embodiment of the present invention.
FIG. 2 is a front view of FIG. 1;
3 is a rear view of FIG. 1. FIG.
4 is a bottom view of FIG. 1. FIG.
FIG. 5 is a sectional view showing an assembled state of the embodiment of the present invention.
FIG. 6 is a development view of a fixing metal fitting according to an embodiment of the present invention.
FIG. 7 is a perspective view of a fixture according to an embodiment of the present invention.
FIG. 8 is a perspective view of a mounting bracket according to an embodiment of the present invention.
FIG. 9 is a perspective view of a terminal mechanism according to an embodiment of the present invention.
FIG. 10 is a perspective view of a main body according to an embodiment of the present invention.
FIG. 11 is an exploded inner view of the case of the embodiment of the present invention.
FIG. 12 is a plan view showing an assembled state in the case of the embodiment of the present invention.
FIG. 13 is a development view of an insect screen according to an embodiment of the present invention.
FIG. 14 is an operation explanatory diagram of the embodiment of the present invention.
FIG. 15 is a perspective view of a tester according to an embodiment of the present invention.
FIG. 16 is a perspective view of a tester adapter according to an embodiment of the present invention.
FIG. 17 is a perspective view of an extractor according to an embodiment of the present invention.
FIG. 18 is a configuration explanatory view of a stepladder piece according to a modification of the present invention.
FIG. 19 is a configuration explanatory view of a connecting piece according to a modification of the present invention.
FIG. 20 is a diagram illustrating the configuration of another modification of the present invention.
FIG. 21 is a diagram illustrating the configuration of an application example of the present invention.
22 is a bottom view of FIG. 21. FIG.
FIG. 23 is a diagram illustrating the configuration of a conventional fire detector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 System ceiling 2 Fixing member 4 Mounting member 5 Terminal mechanism 6 Fire detector main body 9 Pull-out device 11 T-bar 14 Opening 15 Ceiling board 16 Opening 20 Fixing brackets 21 and 22 Step stand pieces 27 and 28 Tightening screw 40 Mounting bracket 40f Marking 41 holding frame 42 frame frame 43 spring plate 44 collar 45 mounting chamber 50 terminal block 51 printed board 60 case 61 main case 61a screw 61b drop part 61c sliding part 62 sub (auxiliary) case 62a smoke inlet 62e display window 63 surface Case 63f Key-shaped piece 63g Vent hole 63h Vent hole 64 Back case 64f Key-shaped piece 64m Drain port 65 Printed circuit board 67 Optical stand 67b Light emitting element 67c Light receiving element 68 Optical stand cover 69 Insect screen 70 Indicator light (confirmation light)
71 Detection chamber 72 Mounting chamber 73 Insect screen 81, 82 Connecting metal fitting 83 Wing screw 84 Wing screw 85 Screening plate 86 Tester 87, 88 Adapter

Claims (1)

A stepladder-shaped fixing member straddling the mounting opening provided on the ceiling, a mounting member attached to the ceiling by locking the collar piece to the opening by the fixing member, and the mounting member In a fire detector mounting structure comprising: a main body of a rectangular parallelepiped fire detector to be mounted; and a fixing means for removably fixing the main body to a contact surface between an outer wall of the main body and an inner wall of the mounting member. ,
An arm that is inserted between contact surfaces of the main body and the mounting member to release the locking of the fixing means, and a hooking claw that is fixed to the released fixing means, and is attached to the mounting member An apparatus for removing a fire detector, comprising a substantially U-shaped puller for pulling out the main body from a mounting member .

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