JP2012139252A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head capable of spraying water in the direction of fire source and decreasing a useless water spraying.SOLUTION: The sprinkler head has a head body 10 having a water spraying opening 12 inside of the same, a valve body 40 closing the water spraying opening 12, a deflector 51 connected to the valve body 40, and a thermosensitive disassembling mechanism 70 having a thermosensitive body and supporting the valve body 40, wherein the thermosensitive mechanism 70 is disassembled and falls and the valve body 40 and the deflector 51 falls when operating. A driving part 80 having the valve body 40, the deflector 51, and the thermosensitive disassembling mechanism 70 is constituted of two or more divided driving parts 80A divided radially around the center axis of the water spraying opening 12, divided thermosensitive bodies 72A adjacent to each other in each divided driving parts 80A are arranged while thermally separating the same, a stopper mechanism (divided stoppers 53A and a guide rod 52) for stopping at an operating position, the divided valve bodies 40A and the divided deflectors 51A falling when operating is arranged in each of the divided driving parts 80A.

Description

  The present invention relates to a sprinkler head.

  As a conventional sprinkler head, for example, there is a head provided with a water stop means, a lock means, and a heat sensitive means (see, for example, Patent Document 1). In this sprinkler head, water is sprayed in all directions from the water outlet at 360 ° during operation.

Japanese Patent Laid-Open No. 10-179789 (Claims, FIG. 1)

  Since the sprinkler head is sprinkled in all directions from the water outlet of the sprinkler head regardless of the position of the fire source, the sprinkler head may be unnecessarily discharged without contributing to fire extinguishing.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a sprinkler head that can spray water toward the direction of a fire source and reduce wasteful water discharge.

  A sprinkler head according to the present invention includes a head body having a water discharge port therein, a valve body that closes the water discharge port, a deflector connected to the valve body, a heat sensitive body, and a thermal decomposition mechanism that supports the valve body. In the sprinkler head in which the thermal decomposition mechanism is decomposed and dropped during operation, and the valve body and the deflector descend, the drive unit having the valve body, the deflector and the thermal decomposition mechanism is divided radially about the central axis of the water outlet It is composed of two or more divided drive units, and in each divided drive unit, the divided heat sensitive bodies adjacent to each other are thermally separated from each other, and the divided valve body and the divided deflector descending during operation are stopped at the operating position. A stopper mechanism is provided in each of the divided drive units.

  According to the sprinkler head according to the present invention, among the plurality of divided drive units, the divided drive unit that is close to the fire source and that is strongly influenced by the heat from the fire source operates. Water discharge can be reduced.

It is a longitudinal cross-sectional view of the sprinkler head which concerns on one embodiment of this invention. FIG. 2 is a perspective view of a fixing unit and a split driving unit in FIG. 1. It is a figure which shows the connection state of the division | segmentation valve body of FIG. 1, and a plunger. It is the perspective view which looked at the sprinkler head of FIG. 1 from the downward direction. It is the perspective view which extracted and showed the division | segmentation watering part mainly from the sprinkler head of FIG. It is a figure which shows another example of the thermal separation structure of adjacent division | segmentation heat sensitive bodies. FIG. 2 is a diagram (1/2) illustrating an operation process of the sprinkler head of FIG. 1. FIG. 2 is a diagram (2/2) illustrating an operation process of the sprinkler head of FIG. 1.

  FIG. 1 is a longitudinal sectional view of a sprinkler head according to an embodiment of the present invention. FIG. 2 is a perspective view of the fixing unit and the split driving unit of FIG. In FIG. 2, only one divided drive unit is shown, and the other divided drive units are not shown. 3A and 3B are diagrams showing a connection state between the split valve body and the plunger of FIG. 1, FIG. 3A is a perspective view, and FIG. 3B is a plan view. FIG. 3 shows a split valve body and a plunger in one split drive unit, and illustration of the other split drive units is omitted. FIG. 4 is a perspective view of the sprinkler head of FIG. 1 as viewed from below. FIG. 5 is an operation explanatory diagram of the split watering portion of the sprinkler head of FIG. 1, and illustrations of portions other than the portions necessary for the operation description are omitted.

  The sprinkler head 1 includes a head main body 10 having a water discharge port 12 therein, a frame 20, a fixing unit 30, and a drive unit 80. The drive unit 80 is centered on the central axis of the water discharge port 12. As shown in FIG. 2, it is divided into two or more, for example, three, and is divided into three divided drive units 80A (see FIG. 2), each of which is characterized by being independently operable. Hereinafter, each component will be described in order. Note that the number of divisions of the drive unit 80 is not limited to three and can be divided into two or more.

  The head body 10 has an opening at the center. The opening 11 forms a water discharge port 12 together with a water discharge tube 16 described later. A flange 13 is formed on the outer peripheral portion of the head main body 10, and a screw portion 14 connected to the water supply pipe is formed on the outer peripheral portion of the head main body 10 above the flange 13. A threaded portion 15 for attaching a frame 20 to be described later is formed on the inner peripheral portion on the side.

  A cylindrical water discharge cylinder 16 is formed on the inner side of the head body 10 so as to protrude downward. A locking step portion 16a protruding inward is provided at the lower end portion of the water discharge tube 16 of the head body 10, and a nozzle 31 described later is locked to the locking step portion 16a. The nozzle 31 is locked to the lower end of the head body 10 above a valve body 40 to be described later.

  The frame 20 is formed in a cylindrical shape. A screw portion 21 is formed on the outer periphery of the upper portion of the frame 20 and is attached to the screw portion 15 formed on the lower side of the head body 10. A locking step portion 22 protruding inward is provided at the lower portion of the frame 20, and a ball 61 described later is locked to the locking step portion 22.

  The fixing unit 30 includes a nozzle 31, a plunger 32, and a set screw 33.

  The nozzle 31 is integrally formed with a cylindrical portion 31 a that is locked to the locking step portion 16 a of the water discharge cylinder 16 and a separator 31 b that divides the inside of the cylindrical portion 31 a into the same number as the number of divisions of the driving unit 80. . The separator 31b has a shape in which a flat plate extends radially from the circumferential surface of the columnar central portion 31c located at the center of the cylindrical portion 31a to the inner surface of the cylindrical portion 31a, and the water discharge port 12 is substantially fan-shaped. For each 40A, this embodiment is divided into three. A concave portion is formed on the lower surface of the central portion 31c, and a female screw 31d to which a set screw 33 described later is screwed is formed on the peripheral surface of the concave portion.

  The plunger 32 passes through the center of the drive unit 80 and is formed at a shaft part 32a fixed to the nozzle 31 at the lower end of the shaft part 32a. The plunger 32 locks the drive part 80 during monitoring and is described later during operation. The split valve body 40A and the split deflector 51A have a flange portion 32b that prevents the fall, and the upper surface of the shaft portion 32a is in contact with the lower surface of the central portion 31c of the nozzle 31. A through hole penetrating in the axial direction is formed inside the plunger 32, and a set screw 33 is inserted into the through hole from the opposite side of the nozzle 31, and a male screw at the tip of the shaft portion of the set screw 31 The set screw 33, the plunger 32, and the nozzle 31 are coupled by screwing the female screw 31 d of the nozzle 31. Further, as shown in FIG. 3, a pair of locking grooves 32d, which are locked by a pair of protrusions 40d of a split valve body 40A described later, extend in the axial direction on the outer peripheral surface of the shaft portion 32a of the plunger 32. And provided in three locations in the circumferential direction.

  On the upper surface of the flange portion 32b of the plunger 32, a heat insulating partition plate 32e (see FIG. 3, not shown in FIG. 2) is erected at a position facing the separator 31b of the nozzle 31. In each region on the upper surface of the flange portion 32b partitioned by the heat insulating partition plate 32e, a substantially fan-shaped divided thermal body 72A (see FIG. 2) described later is placed, and the divided thermal bodies 72A are thermally connected to each other. Try to separate.

  As a method of thermally separating the divided heat sensitive bodies 72A adjacent to each other, it is effective to merely separate the adjacent divided heat sensitive bodies 72A spatially, but in this example, the flange 32b of the plunger 32 On the upper surface, a heat insulating partition plate 32e was erected at the position of the boundary between the divided heat sensitive bodies adjacent to each other in each divided driving unit 80A. Thus, since it was set as the structure which partitions off the mutually adjacent division | segmentation heat sensitive bodies 72A positively, the thermal isolation effect, in other words, the heat transfer prevention effect is high. In addition, for example, as shown in FIG. 6, a structure in which the separator 31 (comprising a heat insulating material) 31 b of the nozzle 31 is extended until it contacts the upper surface of the plunger 32 may be used.

  Hereinafter, the configuration of the drive unit 80 will be described. The drive unit 80 includes a water spray unit 50 having a valve body 40 and a deflector 51, and a thermal decomposition mechanism 70. Each of the water spray unit 50 and the thermal decomposition mechanism 70 has a central axis of the water outlet 12 as described above. Is divided into three parts radially, and three divided drive units 80A are configured. The configuration of each divided drive unit 80A is the same. Hereinafter, each component will be described in order.

  The valve body 40 is arranged below the nozzle 31 and has a shape in which a plurality of cylinders having different diameters are coaxially stacked and integrated, and is radially divided into three according to the divided region of the nozzle 31. Yes. Each divided valve body 40 </ b> A (see FIG. 2) closes each water outlet 12 that is radially divided by the nozzle 31. The diameter of the uppermost column of the valve element 40 is smaller than the inner diameter of the cylindrical portion 31a of the nozzle 31 and is a convex portion 40a projecting into the nozzle 31, and the two-stage column below the convex portion 40a is the uppermost column. The flange portion 40b has a larger diameter than the upper column. The valve seat 17 of the head body 10 is blocked by the flange portion 40b. The valve seat 17 is provided with an annular Teflon (registered trademark) sheet or is coated with a Teflon (registered trademark) to prevent water leakage from the water outlet 12. When an annular Teflon (registered trademark) sheet is used, when only a part of the divided drive unit 80A is operated, it remains in the current position together with the divided valve body 40A of the other non-operated divided drive unit 80A. Teflon (registered trademark) sheet is soft and does not interfere with water discharge.

  A through hole 40c penetrating in the vertical direction is formed in the central portion of the valve body 40. The central portion 31c of the nozzle 31 is inserted into the upper side inside the through hole 40c, and the plan is formed in the lower side of the through hole 40c. The shaft portion 32a of the jar 32 is inserted. The valve body 40 is supported by a thermal decomposition mechanism 70, which will be described later, and is held at the position shown in FIG. In each divided valve body 40A, a pair of protrusions 40d projecting in the vertical direction are formed on the inner peripheral surface of the through hole 40c as shown in FIG. It is latched by the provided pair of latching grooves 32d. The pair of protrusions 40d are formed so as to project in directions intersecting with each other, and fall off in the radial direction from the shaft portion 32a of the plunger 32 when the split valve body 40A descends during the water discharge operation. Is preventing. As a result, the divided valve body 40A is stably guided to the operating position where the divided valve body 40A is locked to the flange portion 32b of the plunger 32 (see FIG. 5B). In addition, the structure as a stopper mechanism which is provided in each of the divided drive units 80A and stops the divided valve body 40A and the divided deflector 51A which are lowered at the time of operation is not limited to this structure, and the water spray unit 50 described below. The structure around the guide rod 52 is also possible. This structure will be described later.

The water sprinkling part 50 is provided with the above-mentioned valve body 40, the deflector 51, and the guide rod 52, and is divided | segmented into the three division | segmentation watering part 50A, and each is comprised so that watering is possible independently. The structure of each division | segmentation watering part 50A is the same. Hereinafter, it demonstrates in order.
The deflector 51 is configured by a disk having an opening at the center and having a sprinkling groove formed at the peripheral edge, and the flange of the valve body 40 is inserted in a state where the lower part of the valve body 40 is inserted into the opening. It is connected (fixed) to the lower surface of the portion 40b. Similarly to the valve body 40, the deflector 51 is also radially divided into three according to the divided region of the nozzle 31, and each divided deflector 51A is provided with an insertion hole 51a into which the guide rod 52 is inserted. The lower end of the guide rod 52 is a stepped portion 52 a having an enlarged diameter. The guide rod 52 is fixed to the deflector 51 with the upper surface of the stepped portion 52 a being in contact with the lower surface of the deflector 51. Therefore, the divided valve body 40A, the divided deflector 51A, and the guide rod 52 are integrally configured.

  The stopper 53 is formed in a cylindrical shape whose upper and lower ends are closed as a whole, and has a structure in which a through-hole penetrating in the vertical direction is formed in the center, and like the valve body 40 and the deflector 51, It is divided into three radially according to the divided area. Each of the divided stoppers 53A includes an upper annular flat portion 53b and a lower annular portion extending radially inward from the peripheral surface portion 53a along the inner peripheral surface of the frame 20 and the upper and lower ends of the peripheral surface portion 53a to the outer periphery of the water discharge tube 16. It has a flat part 53c and is formed in a U-shaped cross section. The outer diameter of the stopper 53 as a whole is formed to be larger than the inner diameter of the locking step portion 22 of the frame 20, and the divided stopper 53A has a divided thermal decomposition mechanism 70A, which will be described later, drops below the divided water spraying portion 50A during the water discharge operation. Then, it is comprised so that it may descend | fall to the latching step part 22 of the flame | frame 20 with dead weight.

  The lower annular flat portion 53c of the division stopper 53A is provided with an insertion hole 53d at a position facing the insertion hole 51a of the division deflector 51A, and the shaft of the guide rod 52 is inserted into the insertion hole 53d. At the upper end of the shaft of the guide rod 52, a stepped portion 52b having an enlarged diameter for a stopper larger than the insertion hole 53d is formed. With the above configuration, the division stopper 53A is attached to the guide rod 52 so as to be able to slide to the locking step portion 22a by sliding on the guide rod 52 during the water discharge operation. In other words, the guide rod 52 is attached to the split stopper 53A so as to be movable downward along the insertion hole 53d of the split stopper 53A during the water discharge operation.

  The upper annular flat portion 53b of the split stopper 53A is located above the lower end of the water discharge tube 16 in a state where the lower annular flat portion 53c is locked to the locking step portion 22 of the frame 20, and the split stopper 53A is lowered. The inner peripheral surface of the upper annular flat portion 53 b is guided by the outer periphery of the water discharge cylinder 16, and the peripheral surface portion 53 a is guided by the inner peripheral surface of the frame 20. In this way, the split valve body 40A and the split deflector 51A are locked via the guide rod 52 so as to move up and down to the split stopper 53A that is guided in the frame 20 and descends to the stop step 22a and stops during the water discharge operation. Has been. The split stopper 53A and the guide rod 52 constitute a stopper mechanism that lowers the split deflector 51A and the split valve body 40A during the water discharge operation and stops them at the operating position.

  In the gap between the lower annular flat portion 53c of the division stopper 53A and the deflector 51, a leaf spring (not shown) for urging the lower annular flat portion 53c upward is disposed. The division stopper 53A is pressed by a leaf spring (not shown) and arranged on the upper side in the frame 20 (see FIG. 5A). During the water discharge operation, the split stopper 53A is lowered until it is locked to the locking step portion 22a, and the split valve body 40A is lowered together with the split deflector 51A and the guide rod 52 until the split valve body 40A is locked to the flange portion 32b of the plunger 32. At this time, the step 52b at the upper end of the guide rod 52 is locked to the lower annular flat portion 53c of the division stopper 53A (see FIG. 5B). Further, the water discharge operation is possible without the leaf spring between the lower annular flat portion 53c and the deflector 51. However, when the leaf spring is present, the force that pushes the valve body 40 downward through the deflector 51. Therefore, it assists that the valve body 40 separates from the nozzle 31 during the water discharge operation. Thereby, it becomes possible to make it operate | move more reliably at the time of a water discharge operation | movement.

  The lower annular flat portion 53 c of the stopper 53 is provided at a position approximately in the middle of the frame 20 in the height direction and facing a slit provided in the frame 20. The slit does not necessarily have to be provided at a position facing the stopper 53.

  The thermal decomposition mechanism 70 includes a thermal plate 71, a thermal body 72, a heat insulating material 73, a ball holding mechanism 60, and a leaf spring 64. The thermal decomposition mechanism 70 is also radially divided into three, and can be operated independently for each divided thermal decomposition mechanism 70A. Hereinafter, each component will be described in order.

  The heat sensitive body 72 is made of, for example, solder, and has an annular shape as a whole, and the three substantially fan-shaped divided heat sensitive bodies 72A divided in the radial direction are arranged below the shaft portion 32a of the plunger 32 as described above. It is mounted on the upper surface of the formed flange portion 32b. Between the adjacent divided heat sensitive bodies 72A, the heat insulating partition plate 32e is positioned and thermally separated as described above. In this way, by arranging the adjacent divided thermal bodies 72A to be thermally separated, it is possible to prevent the heat received by any of the divided thermal bodies 72A during a fire from being transmitted to the adjacent divided thermal bodies 72A. Thus, the operation of the split drive unit 80A only at necessary portions can be performed. A split heat sensitive plate 71A that is substantially fan-shaped and has a crank-shaped cross section is provided above each of the split heat sensitive bodies 72A. That is, each of the divided heat sensitive plates 71A includes a protrusion 71a that covers the divided heat sensitive body 72A provided on the flange portion 32b of the plunger 32, and the protrusion 71a, and is orthogonal to the axis of the head body 10. And a disc portion 71b extending in the direction of the movement. A force is applied to the divided thermal plate 71A so as to compress the divided thermal body 72A by a divided ball holding mechanism 60A described later.

  On the upper part of the divided heat sensitive plate 71A, fan-shaped divided heat insulating materials 73A provided corresponding to the respective divided heat sensitive members 72A are provided, and heat received by the divided heat sensitive plate 71A escapes to the divided balancer 63A described later. There is no way. In addition, you may make it provide another division | segmentation thermal plate 74A with a large diameter between the division | segmentation heat insulating material 73A and the division | segmentation thermal plate 71A as needed. The divided heat sensitive plates 74A are also provided in the same number as the divided heat sensitive plates 71A and facing the divided heat sensitive plates 71A corresponding to the divided heat sensitive members 72A, respectively.

  The ball holding mechanism 60 includes a ball 61, a slider 62, a balancer 63, and a leaf spring 64. The lower outer periphery of the ball 61 is locked to the locking step 22 of the frame 20. In this state, it is the slider 62 that presses the ball 61 from above, and when a force is applied from the slider 62 to the ball 61, a force acts on the ball 61 in the direction of entering the inside.

  The balancer 63 is provided inside the ball 61, and regulates the movement of the ball 61 trying to enter the inside of the ball 61. Both the slider 62 and the balancer 63 are formed in a disk shape as a whole, and are radially divided into three parts corresponding to the respective divided watering portions 50A. A through hole having the same diameter is formed at the center of the slider 62 and the balancer 63, and a plunger 32 is passed through the through hole of the slider 62 and the balancer 63. The outer diameter of the plunger 32 is slightly smaller than the inner diameters of the through holes of the slider 62 and the balancer 63, and both are not coupled.

  The balancer 63 has a shape in which a cylindrical portion having a through hole and a disk portion provided above the cylindrical portion are combined. A step portion is formed at the lower outer periphery of the balancer 63. The outer peripheral lower step portion is configured to abut on the inner lower portion of the locking step portion 22 of the frame 20. When an external force is applied from below the balancer 63, Absorb the shock at the part. Further, a stepped portion 63a into which the heat insulating material 73 is fitted protrudes from the lower portion of the cylindrical portion of the balancer 63 around the central through hole, and the ball 61 hits the ball 61 at the upper portion of the disc portion of the balancer 63. The step 63b is formed so as to protrude.

  The surface with which the ball 61 on the lower outer peripheral side of the slider 62 comes into contact is formed in a tapered shape (inclined portion) so as to incline downward. It is even better if the recess 62a is formed on the surface of the slider 62 on the outer peripheral side of the lower surface where the ball 61 comes into contact because it becomes easier to assemble.

  As described above, a force is applied to the ball 61 so that the ball 61 always moves inward. Therefore, in each divided ball holding mechanism 60A, the force is applied to move the divided balancer 63A downward and the divided slider 62A upward. Works. Therefore, if the solder, which is the divided heat sensitive body 72A, melts and flows out, the divided balancer 63A moves downward, and accordingly, the ball 61 enters inside and is engaged with the engagement step portion 22 of the frame 20. Is released, the split ball holding mechanism 60A falls together with the split heat sensitive plate 71A. If the split ball holding mechanism 60A falls, the split valve body 40A, the split stopper 53A, etc. constituting the split water sprinkling part 50A will drop accordingly, and water will be discharged.

  One leaf spring 64 is provided between the valve body 40 and the slider 62 corresponding to each of the divided water sprinkling portions 50A, and is arranged in a compressed manner to bear most of the load during assembly. . Further, the leaf spring 64 has a role of facilitating the drop of the split slider 62A by pressing the split slider 62A downward when the split ball holding mechanism 60A is dropped.

  In the sprinkler head 1 as described above, in the state of FIG. 1, the water pressure of the fire extinguishing water at the outlet 12 and the assembly load of the parts act on the ball 61, and the ball 61 tends to move inward (center side). However, the movement of the ball 61 is blocked by the balancer 63, and the ball holding mechanism 60 holds the ball 61. In this state, the leaf spring 64 presses the valve body 40 upward, and the valve body 40 seals the water outlet 12 of the head body 10. For this reason, although the fire extinguishing water pressurized is supplied to the sprinkler head 1, the fire extinguishing water does not leak. In the water sprinkling unit 50, the deflector 51 is fixed to the valve body 40, and the guide rod 52 is fixed to the deflector 51. When the valve body 40 seals the water outlet 12, the guide rod 52 is a frame. 20 is stored in the upper space.

  FIGS. 7A to 7D and FIGS. 8E to 8H are views showing an operation process of the sprinkler head 1. In the sprinkler head 1 of this example, since the operation when the divided drive unit 80A is sensitive to heat is the same in any divided drive unit 80A, only one divided drive unit 80A is shown in FIGS. The operation will be described with reference to FIG.

  In the monitoring state of the sprinkler head 1 (FIG. 7A), pressurized fire extinguishing water is supplied to the water outlet 12 of the head body 10, and the pressure of the fire extinguishing water is applied to the valve body 40. (See FIG. 1). When a fire occurs and the hot airflow hits the heat sensitive plate 71, the heat sensitive plate 71 is heated and the heat of the heat sensitive plate 71 propagates to the heat sensitive body 72. At this time, in the heat sensitive plate 71, heat propagates from the divided heat sensitive plate 71A close to the fire source to the corresponding divided heat sensitive member 72A. When the divided thermal body 72A is heated from the surroundings and starts to melt, the molten divided thermal body 72A flows out from the gap formed between the plunger 32 and the divided thermal plate 71A (projection 71a), and The volume decreases (FIG. 7 (b)).

  Then, when the divided balancer 63A descends, the ball 61 pushed from above moves inward, and the divided slider 62A descends. Even if the divided slider 62A descends, the divided valve body 40A remains in the valve seat 17. To maintain the state where the water outlet 12 is closed. This is due to the action of the leaf spring 64 and prevents the divided valve body 40A from separating from the valve seat 17 until the divided ball holding mechanism 60A completely drops.

  When the divided thermal body 72A is melted and flows out, the divided thermal plate 71A descends corresponding to the outflow amount of the divided thermal body 72A. When the divided heat sensitive plate 71A is lowered, the divided heat insulating material 73A and the divided balancer 63A attached on the divided heat sensitive plate 71A are lowered (FIG. 7C). When the split balancer 63A is lowered, a gap between the split balancer 63A and the split slider 62A is widened, and the ball 61 urged inward moves inward beyond the step portion 63b of the split balancer 63A. The engagement between the locking step 22 and the ball 61 is released, and the entire split thermal decomposition mechanism 70A falls (FIG. 7D). Here, since the divided thermal plate 71A, the divided thermal plate 74A, the divided balancer 63A, and the divided slider 62A of the divided thermal decomposition mechanism 70A have a center of gravity on the outside, they are tilted to the outside and operate away from the shaft portion 32a of the plunger 32. Fall.

  When the split thermal decomposition mechanism 70A falls, the split watering part 50A descends. That is, the divided valve body 40A, the divided deflector 51A attached to the divided valve body 40A, and the guide rod 52 attached to the divided deflector 51A are lowered. When the guide rod 52 is lowered, the urging force of a leaf spring (not shown) between the divided deflector 51A and the lower annular flat portion 53c of the divided stopper 53A is released, and the divided stopper 53A is also lowered (FIG. 8 (e). )). The division stopper 53A is further lowered, and the lower annular flat portion 53c is locked to the locking step portion 22 of the frame 20 (FIG. 8 (f)). The split valve body 40A and the split deflector 51A are further lowered from that position and stopped at the operating position locked to the flange portion 32b of the plunger 32, and are suspended from the frame 20 by the guide rod 52 and the split stopper 53A. A state is reached (FIG. 8G).

  In the present embodiment, the split valve body 40A and the split deflector 51A descend together with the guide rod 52 while being guided by the locking groove 32d (see FIG. 3) on the outer peripheral surface of the plunger 32 during the water discharge operation. The lowering operation of the valve body 40A and the divided deflector 51A is performed smoothly. Further, by providing the lower annular flat portion 53c of the division stopper 53A substantially in the middle of the frame 20 in the height direction, the amount of lowering of the division stopper 53A itself can be reduced, so that the operation at the time of water discharge becomes smooth.

  When the divided valve body 40A descends as described above, the divided area of the water outlet 12 corresponding to the divided valve body 40A is opened, and the pressurized fire extinguishing water is sprayed from the divided deflector 51A (FIG. 8 (h)). ) Extinguish the fire. 7 and 8, the other split drive unit 80A is omitted, but the non-actuated split drive unit 80A is maintained at the position shown in FIG. Accordingly, water is discharged only from the divided water spraying part 50A of the activated split driving part 80A.

  As described above, according to the present embodiment, each of the divided drive units 80A operates independently. Therefore, in the event of a fire, of the plurality of divided drive units 80A, the fire source is close to the fire source. The split drive unit 80A that is strongly affected by the heat of the is activated. That is, the split heat sensitive body 72A of the surface in the direction of the hot air flow from the fire source melts, the split drive unit 80A having the split heat sensitive body 72A operates, and water can be intensively sprayed toward the fire source. Therefore, fire extinguishing efficiency improves, useless water discharge is reduced, and water loss can be reduced.

  In addition, since the divided heat sensitive bodies 72A adjacent to each other are arranged in each divided drive unit 80A in a thermally separated manner, the heat received by any of the divided heat sensitive bodies 72A during a fire is transmitted to the adjacent divided heat sensitive bodies 72A. This makes it possible to actuate only the split drive unit 80A at a required location. In addition, as a structure for thermally separating the divided heat-sensitive bodies 72A adjacent to each other, when a heat insulating partition plate 32e is provided, or when the separator 31b of the nozzle 31 is extended to contact the upper surface of the plunger 32 The thermal separation effect can be further enhanced.

  In the case of the nozzle 31 having the separator 31b that is locked to the lower end portion of the head body 10 above the valve body 40 and divides the water discharge port 12 for each divided valve body 40A, the upper end passes through the center of the drive unit 80 and the upper end is the nozzle. A plunger 32 having a shaft portion 32 a fixed to 31 and having a flange portion 32 b on which the heat sensitive body 72 is placed is formed at the lower end of the shaft portion 32 a, and the separator 31 b of the nozzle 31 is the plunger 32. It has the structure extended below until it reached the upper surface of the flange part 32b, and between the division | segmentation thermal bodies 72A adjacent to each other in each division | segmentation drive part 80A is thermally insulated by the extended front-end | tip part.

  DESCRIPTION OF SYMBOLS 1 Sprinkler head, 10 Head main body, 11 Opening part, 12 Water discharge port, 13 Flange, 14 Screw part, 15 Screw part, 16 Water discharge cylinder, 16a Locking step part, 17 Valve seat, 20 Frame, 21 Screw part, 22 Engagement Stopped part, 22a Locking step part, 30 Fixed part, 31 Nozzle, 31a Cylindrical part, 31b Separator, 31c Center part, 31d Female thread, 32 Plunger, 32a Shaft part, 32b Flange part, 32c Female thread, 32d Locking groove , 32e heat insulation partition plate, 33 set screw, 40 valve body, 40A split valve body, 40a convex part, 40b flange part, 40c through hole, 40d protrusion, 50 water spray part, 50A split water spray part, 51 deflector, 51A split Deflector, 51a Insertion hole, 52 Guide rod, 52a Step, 52b Step, 53 Strike Par, 53A division stopper, 53a peripheral surface portion, 53b upper annular flat portion, 53c lower annular flat portion, 53d insertion hole, 60 ball holding mechanism, 60A division ball holding mechanism, 61 balls, 62 slider, 62A division slider, 62a recess 63 balancer, 63A split balancer, 63a stepped portion, 63b stepped portion, 64 leaf spring, 70 thermal decomposition mechanism, 70A divided thermal decomposition mechanism, 71 thermal plate, 71A divided thermal plate, 71a protrusion, 71b disc portion, 72 Heat sensitive body, 72A divided heat sensitive body, 73 heat insulating material, 73A divided heat insulating material, 74A divided heat sensitive plate, 80 drive unit, 80A divided drive unit.

Claims (3)

A head main body having a water outlet, a valve body that closes the water outlet, a deflector connected to the valve body, and a thermal decomposition mechanism that has a heat sensitive body and supports the valve body, In the sprinkler head in which the thermal decomposition mechanism is decomposed and dropped, and the valve body and the deflector descend,
The drive unit having the valve body, the deflector, and the thermal decomposition mechanism is composed of two or more divided drive units that are radially divided around the central axis of the water outlet, and each of the divided drive units A sprinkler in which each of the divided drive units is provided with a stopper mechanism that arranges the divided divided thermal bodies separately from each other and stops the divided valve body and the divided deflector that are lowered during operation at the operating position. head. A nozzle that is locked to the lower end of the head body above the valve body and divides the water outlet for each of the divided valve bodies;
A shaft portion penetrating through the center of the drive portion and having an upper end fixed to the nozzle; and a plunger having a flange portion on which the heat sensitive body is placed at the lower end of the shaft portion. ,
The sprinkler head according to claim 1, wherein a heat insulating partition plate is erected on an upper surface of the flange portion at a position of a boundary between the divided heat sensitive bodies adjacent to each other in each of the divided driving units. A nozzle having a separator that is locked to a lower end portion of the head body above the valve body and divides the water outlet for each of the divided valve bodies;
A shaft portion penetrating through the center of the drive portion and having an upper end fixed to the nozzle; and a plunger having a flange portion on which the heat sensitive body is placed at the lower end of the shaft portion. ,
The separator of the nozzle extends downward until it reaches the upper surface of the flange portion of the plunger, and between the divided heat-sensitive bodies adjacent to each other in the divided drive portions by the extended tip portion. The sprinkler head according to claim 1, wherein the head is partitioned in an adiabatic manner.

Images