JP2015134003A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head that can stop water discharge as required and can be readily installed.SOLUTION: A sprinkler head 1 includes: a water stop mechanism 5 provided to a head body 2 to stop flow of fire extinguishing water W to an outlet 2a when a valve body 3 is opened and the fire extinguishing water W is discharged from the outlet 2a; and an activating wire 6 to activate the water stop mechanism 5. The activating wire 6 is suspended below the head body 2 when a thermosensitive releasable mechanism unit 4 is released.

Description

  The present invention relates to a fire extinguishing sprinkler head.

  If the sprinkler head breaks due to an impact in the event of an earthquake or an impact, it will cause false water discharge. As a result, a large amount of fire-extinguishing water may be sprinkled, resulting in significant water damage.

  As a technique for reducing such water loss, for example, the technology described in Japanese Utility Model Publication No. 5-4846 (Patent Document 1) uses a sprinkler as a water stop mechanism for stopping the inflow of fire-extinguishing water to the sprinkler head. An emergency water discharge stop device is proposed which is provided between the head and the pipe and is provided by extending an activation wire for activating the mechanism to an operation box on the wall surface of the installation site.

Japanese Utility Model Publication No. 5-4846

  However, since the emergency water discharge stop device needs to be provided with a water stop mechanism, a starter wire, and the like separately from the sprinkler head, there is a problem that labor during construction increases. In addition, since the water stop mechanism is structured between the sprinkler head and the pipe, the connection distance from the pipe to the head becomes long, and the installation place is a narrow place on the back of the ceiling, a place with a bare ceiling, etc. If it is a place where the long connection distance cannot be secured in the installation space, there is a problem that the installation cannot be performed. Furthermore, since the activation wire is always exposed on the wall surface of the installation location, there is a problem that the beauty of the installation location is impaired.

  In the case of the emergency water discharge stop device described above, it is necessary to bend the activation wire at a plurality of locations in order to be provided along the wall surface, but in order to ensure that the force for operating the activation wire is transmitted to the water stop mechanism. It is understood that it is necessary to provide a power transmission mechanism such as a pulley and a wire guide in the middle. In other words, it is understood that the labor during construction will actually increase.

  In view of the circumstances described above, an object of the present invention is to provide a sprinkler head that can be stopped freely and can be easily installed.

  The present invention includes a head body having a water discharge port at a tip, a valve body that closes the water discharge port, and a thermal decomposition mechanism that always supports the valve body and decomposes by heat in the event of a fire. In the sprinkler head that discharges fire-fighting water from the water discharge port by disassembling the decomposition mechanism and the valve body opening the water discharge port, the valve body is opened and the water discharge port is opened. A water stop mechanism for stopping the flow of the fire extinguishing water to the water outlet when the fire extinguishing water is discharged from the water outlet, and a starting wire for operating the water stop mechanism, the thermal decomposition mechanism A sprinkler head, further comprising an activation wire that is suspended below the head body when the part is disassembled.

  In this invention, by providing the water stop mechanism portion and the starter wire configured as described above, the thermal decomposition mechanism portion is decomposed, the valve body is opened, and fire extinguishing water is discharged from the water outlet. Even in this state, if necessary, by operating the starting wire suspended from the head body, the water stop mechanism is operated to stop the flow of the fire water to the water outlet, and the fire water is discharged from the water outlet. Can be stopped.

  And while being able to stop the discharge of fire extinguishing water arbitrarily as described above, both the water stop mechanism part and the starting wire which are the mechanism parts necessary for that are provided in the sprinkler head, The starting wire as well as the water stop mechanism can be always stored in the sprinkler head, and the work can be completed simply by attaching the sprinkler head itself at the time of installation.

  Therefore, according to the present invention, it is possible to provide a sprinkler head that can be easily installed while water discharge can be stopped arbitrarily.

  More specifically, in comparison with the conventional example, the present invention does not require a water stop mechanism in the joint between the sprinkler head and the pipe, and increases the connection distance between the sprinkler head and the pipe. Therefore, it can be installed even if the installation place is a narrow place behind the ceiling or a place with a bare ceiling. Further, unlike the conventional example, it is not necessary to provide the activation wire along the wall surface of the installation location, and the aesthetic appearance of the installation location is not impaired by the activation wire. Further, as described above, the activation wire can be always built in the sprinkler head, thereby preventing the activation wire from being erroneously operated. Furthermore, since the starting wire is suspended below the head, the force for operating the starting wire can be transmitted linearly to the water stop mechanism, and no power transmission mechanism such as a pulley or wire guide is provided in the middle. In both cases, the force can be reliably transmitted to the water stop mechanism.

This is an example of the sprinkler head of the present invention, in a normal standby state, when the thermal decomposition mechanism is not disassembled, the valve body is closed, and the water stop mechanism is open. FIG. FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 (including a side surface on the drive mechanism side of the water stop mechanism). FIG. 2 is a cross-sectional view taken along the line B-B in FIG. 1 (including a side surface on the ratchet mechanism side of the water stop mechanism). It shows the same as above, and is in an operating state such as in a fire, and the thermal decomposition mechanism is disassembled (the state when the thermal decomposition mechanism is separated from the head body and in the middle of dropping with the starter wire) It is a longitudinal cross-sectional view when the valve body is in an open state, the water stop mechanism is also in an open state, and water discharge is continued. FIG. 4 shows only the water stop mechanism in the state of FIG. 4, and both (a) and (b) schematically show the appearance when in the open state. Are attached with an arrow indicating the state of running water. For convenience of illustration, only the rotating valve body is colored. It shows the same as above, and is in an operating state such as a fire, and the thermal decomposition mechanism is disassembled (the thermal decomposition mechanism separates from the head body and falls with the starter wire, and the total length of the starter wire is It shows the state when fishing down below the main body.) Although the valve body is in the open state, the water stop mechanism is in the closed state and the water discharge is stopped. is there. FIG. 7 shows only the water stop mechanism in the state of FIG. 6, and both (a) and (b) schematically show the appearance when in the closed state, Are attached with an arrow indicating the state of running water stop. For convenience of illustration, only the rotating valve body is colored.

  Hereinafter, an example in which one aspect of the embodiment of the present invention is applied to a sprinkler head having a ball-supporting thermal decomposition mechanism will be described with reference to FIGS.

  The sprinkler head 1 includes a head body 2 having a water discharge port 2a for extinguishing water at the tip, a valve body 3 that closes the water discharge port 2a, and a valve body 3 that is always supported. (See FIG. 1 to FIG. 3). When the thermal decomposition mechanism 4 is disassembled, the valve body 3 is displaced to open the water outlet 2a, whereby the fire water W is discharged from the water outlet 2a. (See FIG. 4).

  And the sprinkler head 1 is provided in the head main body 2, and when the valve body 3 is opened and the fire water is discharged from the water outlet 2a, the sprinkler head 1 is stopped to stop the flow of the fire water to the water outlet 2a. It further includes a water mechanism unit 5 and an activation wire 6 that hangs below the head body 2 when the thermal decomposition mechanism unit 4 for operating the water stop mechanism unit 5 is disassembled (FIGS. 4 and 6). reference).

  Since the sprinkler head 1 includes the water stop mechanism 5 and the starter wire 6, the thermal decomposition mechanism 4 is disassembled in the event of a fire (including malfunction), and the valve body 3 is opened. Even in a state where the fire-extinguishing water W is discharged from the water outlet 2a, by operating the activation wire 6 suspended from the head main body 2 as necessary, the water-stopping mechanism portion 5 flows into the water outlet 2a. The fire extinguishing water W can be stopped from being discharged from the water outlet 2a (see FIG. 6).

  In addition, as described above, even when the valve body 3 is opened and the fire-extinguishing water W is released from the water outlet 2a, the discharge of the fire-extinguishing water W can be arbitrarily stopped. The water stop mechanism 5 and the starter wire 6 which are the mechanical parts are provided in the sprinkler head 1, and the starter wire 6 is always a sprinkler head as well as the water stop mechanism 5 provided in the head body 2. 1 can be stored in the machine 1, and the installation can be completed only by attaching the sprinkler head 1 itself.

  That is, the sprinkler head 1 includes the water stop mechanism 5 and the starter wire 6, so that the sprinkler head 1 can arbitrarily stop water discharge and can be easily installed. Yes.

  The sprinkler head 1 of this embodiment will be described in more detail.

  In the sprinkler head 1, the head main body 2 has an inlet 2b through which extinguishing water flows at the upper end, and has a threaded portion with a pipe for supplying extinguishing water on the outer periphery, and a connecting portion provided on the upper side of the main body. 2c, and has a water discharge port 2a at the lower end, a water discharge tube 2d provided on the lower side of the main body, and a flange 2e formed between the connection portion 2c and the water discharge tube 2d, A fire-extinguishing water flow path 2f is formed that penetrates the entirety in the axial direction and communicates the inflow port 2b and the water discharge port 2a. The valve body 3 and the thermal decomposition mechanism 4 are provided below the head body 2, but the upper part is screwed inside the peripheral wall of the flange 2e so that the valve body 3, the thermal mechanism 4 and the like. A frame 7 extending below the flange 2e is also provided so as to surround the frame.

  The valve body 3 is always supported by the thermal decomposition mechanism 4 and is maintained in a state where it is seated on a valve seat provided at the edge of the water outlet 2a, and the water outlet 2a is closed. Although it is maintained, it is provided so as to be movable in the vertical direction. When the thermal decomposition mechanism 4 is disassembled and the support by it is released, it moves downward to open the water outlet 2a. Yes. The vertical movement of the valve body 3 is guided by a moving mechanism 8 having a spring member 8a having an elastic force in the vertical direction. The movement of the moving mechanism 8 is the frame described above. 7 is guided.

  The thermal decomposition mechanism 4 is a so-called ball type, and a plurality of balls 4a, 4a,. . . A heat-sensitive element 4e such as solder that melts and displaces the link mechanism by heat during a fire is decomposed at the bottom, and the assembled state is always maintained and the valve body 3 is supported. In this case, the valve body 3 is disassembled in the event of a fire, and the valve body 3 is opened.

  Specifically, the thermal decomposition mechanism unit 4 includes the balls 4a, 4a,. . . Is located between the slider 4b, the balancer 4c, which is supported from below, the disc spring 4d which is located between the slider 4b and the valve body 3, and has a vertical elastic force, and the heat collecting plate 4i at its center. Penetrates through the recess 4j and also through the balancer 4c, and penetrates the slider 4b with a plunger 4g having a flange 4f that annularly defines a housing portion for housing the thermal element 4e together with the central recess 4j of the heat collecting plate 4i, The upper part is in contact with the lower surface of the valve body 3, and the lower part is provided with a set screw 4h that is screwed onto the upper part of the plunger 4g. Normally, the balls 4a, 4a,. . . Is supported from below by an inner flange 7a provided at the lower part of the frame 7, and the position is fixed. Thereby, the balls 4a, 4a,. . . Functions as a locking means of the link mechanism, the whole is maintained in the assembled state, and the valve body 3 is supported and maintained in the closed state. On the other hand, in the event of a fire, the heat collecting plate 4i moves downward due to the melting displacement of the heat sensitive element 4e, and the balancer 4c moves downward accordingly, thereby causing the balls 4a, 4a,. . . Is unlocked and the balls 4a, 4a,. . . All of the portions below the valve body 3 fall downward. Thereby, the support state of the valve body 3 is released, and the valve body 3 is brought into an open state (see FIGS. 4 and 6). The change of the valve body 3 to the open state is performed by moving the valve body 3 downward. However, the downward movement of the valve body 3 is guided by the moving mechanism 8 as described above. The movement mechanism 8 has a spring member 8a having a resilient force in the vertical direction, so that the movement is performed immediately.

  In this embodiment, the water stop mechanism 5 is provided with a rotary valve mechanism as a mechanism for the water stop.

  The water stop mechanism 5 of the present embodiment will be described from its outline. A valve body 5a having a cylindrical shape and having a through-hole 5b formed through the body in the radial direction is long. It has a cylindrical shape that is housed so as to be rotatable about a direction axis, and includes an inlet 5d and a sleeve 5c having an outlet 5e that are formed at symmetric positions in the radial direction of the valve body 5a. The water stop mechanism 5 is configured such that the valve body 5a has a state in which the inlet 5d and the outlet 5e of the sleeve 5c communicate with each other through the through-hole 5b of the valve body 5a and a state in which the peripheral wall 5w of the valve body 5a blocks the state. It can be switched by rotating. That is, if the inflow port 5d and the outflow port 5e of the sleeve 5c and the through hole 5b of the valve body 5a coincide with each other, the inflow port 5d is opened by the through port 5b. It will be in the state which communicates between the outflow ports 5e via 5b (refer FIG. 5 (a)), and will be in the state which accept | permits the flow of the fire-extinguishing water W (refer FIG.5 (b)). And if the valve body 5a rotates and the inflow port 5d and outflow port 5e of the sleeve 5c and the through-hole 5b of the valve body 5a are displaced, the inflow port 5d is closed by the peripheral wall 5w of the valve body 5a. It will be in the state which interrupts | blocks between outlets 5e (refer Fig.7 (a)), and will be in the state which stops the flowing water of the fire extinguishing water W. FIG.

  The water stop mechanism 5 is provided in the head body 2 above the valve body 3 as described above. Specifically, the water stop mechanism 5 crosses over the valve body 3 in the flow path 2f. The inlet 5d and the outlet 5e of the sleeve 5c are fixed in a direction facing the channel 2f so as to penetrate the water discharge pipe 2d in the radial direction. If the water stop mechanism 5 is in an open state in which the through hole 5b is located at the position coincident with the inflow port 5a and the outflow port 5e as described above, the inflow port 5d, the through port 5b, and the outflow port 5e in the flow path 2f. Are in a state of allowing the fire-fighting water to flow to the water outlet 2a opened and closed by the valve body 3 (see FIGS. 1 to 5). Then, if the valve body 5a rotates and the inflow port 5d and the outflow port 5e and the through-hole 5b are in the closed state as described above, the inflow port 5d is closed by the peripheral wall 5w of the valve body 5a. Then, the flow of the fire-extinguishing water reaching the water outlet 2a opened and closed by the valve body 3 is stopped (see FIGS. 6 and 7).

  Further, as described above, the water stop mechanism 5 operates to stop the flow of the fire-extinguishing water W to the water discharge port 2a by operating the starter wire 6, but is started to operate in such a manner. A drive mechanism 5 f that rotates the valve body 5 a through the wire 6 is provided. In this embodiment, the drive mechanism 5f is provided at one end of the valve body 5a in the length direction, and is provided with a drive shaft 5g integral with the valve body 5a, and integral with the drive shaft 5g. 6 has a drive lever 5h that is engaged with the base wire 6 and transmits the force by which the starting wire 6 is pulled as a force that rotates the drive shaft 5g. The water stop mechanism 5 is configured such that when the starter wire 6 is pulled, the tip of the drive lever 5h rotates downward, and the valve body 5a can be rotationally driven via the drive shaft 5g (see FIG. 1 and FIG. 1). (See FIG. 2). Reference numeral 5i denotes a spring member for rotating the tip of the drive lever 5h above the initial position to return it. In FIG. 2, the drive lever 5h does not rotate by the spring 5i even if the thermal decomposition mechanism 4 falls, but rotates about 90 degrees clockwise when the activation wire 6 is pulled with a certain amount of force.

  In this embodiment, the water stop mechanism 5 can maintain the rotated state when the valve body 5a is rotated, and the reverse rotation prevention mechanism 5j is used as a mechanism for that purpose. I have. The reverse rotation prevention mechanism 5j is provided at the end opposite to the drive mechanism 5f. In this embodiment, the reverse rotation prevention mechanism 5j is swingable to the ratchet gear 5k provided integrally with the valve body 5a and the sleeve 5c. It is provided and has a pair of ratchet arms 5m and 5m which are located around the ratchet gear 5k and engage with the ratchet gear 5k to prevent reverse rotation of the valve body 5a. Reference numeral 5n denotes a spring member that urges the ratchet arms 5m and 5m toward the ratchet gear 5k.

  The starter wire 6 is suspended below the head body 2 when the thermal decomposition mechanism 4 is disassembled as described above, but is normally stored in the sprinkler head 1 (FIGS. 1 to 3). (See FIG. 3). Specifically, one end of the starting wire 6 is locked to the water stop mechanism 5 as described above, while the other end is locked to the thermal decomposition mechanism 4 and wound around it. The activation wire 6 is accommodated in the sprinkler head 1 over its entire length. In this embodiment, the locking position on the water stop mechanism 5 side of the starting wire 6 is the drive lever 5h as described above, and the locking position and winding position on the thermal decomposition mechanism section 4 side are cylindrical. Although the plunger 4g is formed, the locking position and the winding position can be changed as appropriate.

  In addition, the starter wire 6 is suspended below the head body 2 when the thermal decomposition mechanism 4 is disassembled and dropped below the head body 2 in the event of a fire (including malfunction). However, the length of the suspension can be such that the thermal decomposition mechanism 4 can be suspended in the space (see FIG. 6). Although it is good also as a thing of the grade which falls to a floor surface with the thermal decomposition mechanism part 4, it can also be a thing of the grade which suspends the thermal decomposition mechanism part 4 in space with the starting wire 6. FIG. Thereby, it is possible to make it easy to visually recognize the position of the activation wire 6 serving as the operation means of the water stop mechanism 5, and to operate the activation wire 6 by grasping the suspended thermal decomposition mechanism 4. The operation can be facilitated.

  The starting wire 6 can be made of metal, but is preferably resistant to corrosion. For example, stainless steel, titanium, or alloys thereof can be used. Further, in the drawing, the starting wire 6 is indicated by a bold line for the sake of convenience, but the actual thickness is suspended below the head body 2 when the fire-extinguishing water is discharged from the water outlet 2a. However, it is preferable to use a thin one so as not to obstruct the discharge. For example, the thickness may be about 0.3 mm.

  The sprinkler head 1 of this embodiment is configured as described above, and its operation will be briefly described at the end.

  In the normal standby state, the water stop mechanism 5 is open, but the thermal decomposition mechanism 4 is not disassembled, the valve body 3 is closed, and the fire-extinguishing water W is not released (FIGS. 1 to 5). 3). When the thermal decomposition unit 4 is decomposed in a fire (including malfunction) operation, the valve body 3 is opened, and the fire-extinguishing water W is discharged from the discharge port 2a. As the mechanism unit 4 falls downward, the activation wire 6 hangs below the head body 2 (see FIG. 4). Even when the fire-extinguishing water W is discharged, if it is necessary to stop the discharge, the starter wire 6 suspended below the head body 2 is pulled downward to operate the water stop mechanism 5 in the closed state. If the flow path 2f is closed, the discharge of the fire-extinguishing water W from the discharge port 2a is stopped (see FIG. 6). Specifically, when the starting wire 6 is pulled downward, the drive lever 5h of the water stop mechanism 5 rotates, and the drive shaft 5g rotates accordingly, whereby the valve body 5a rotates and the inflow port 5d. And the outflow port 5e and the through-hole 5b will be in the closed state from which the position has shifted | deviated, and discharge | release of the fire-extinguishing water W from the discharge port 2a is stopped.

  Here, in the sprinkler head 1 of the present embodiment, the water stop mechanism 5 has the valve body 5a in an open state in the initial state, the thermal decomposition mechanism section 4 is disassembled, and the valve body 3 is opened. Then, the fire-extinguishing water W is immediately discharged from the water outlet 2a (see FIG. 4). However, the water stop mechanism 5 is kept in the closed state in the initial state, and thermal decomposition is performed. It is assumed that the valve body 5a is opened through the starting wire 6 due to a drop load when the mechanism unit 4 is dropped, whereby the flow path 2f is opened and the fire-extinguishing water W may be discharged from the water outlet 2a. . By doing so, as long as the thermal decomposition mechanism unit 4 does not fall, the water stop mechanism unit 5 can be prevented from being opened, the sprinkler head 1 is deformed by an external force, and the valve body 3 is displaced. Even if it occurs, it is possible to prevent leakage of fire water.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment.

  For example, as the thermal member, a thermal decomposition part composed of a ball, a balancer, etc. was used. However, the present invention is a thermal sensor composed of a fusible link using a glass valve that bursts in a fire or a molten metal that melts in a fire. The present invention can also be applied to a sprinkler head provided with a disassembly mechanism. In that case, the water stop mechanism can be provided in the water discharge cylinder 2d as in the present embodiment, and the activation wire can be provided in the valve body or the fusible link. Further, the activation wire may be pulled out from a slit provided in the frame so that the activation wire can be pulled from the outside.

  In the above-described embodiment, the valve mechanism configured as described above is used as the water stop mechanism 5. However, the water stop mechanism 5 may be closed through the activation wire 6. For example, other valve mechanisms may be used. For example, in the water stop mechanism 5, the closing operation may be performed by rotating the sleeve 5 c as a valve body instead of the closing operation by rotating the valve body 5 a. Further, instead of the rotary type, a slide type valve mechanism that opens and closes the flow path 2f by moving the valve body 5a in a direction perpendicular to the flow direction of the flow path 2f (horizontal direction in the drawing) may be used. . Further, the entire valve mechanism may be changed, for example, a throttle mechanism type composed of a plurality of blades. The valve body is provided with a taper portion on the inner wall of the flow path 2f, and is slidable in the vertical direction along the inner wall of the flow path 2f, and has an annular base portion and a circumferential direction of the base portion. And a plurality of flexible pieces each having a tapered shape, and slides downward along the tapered portion of the inner wall of the flow path 2f. It is good also as a valve mechanism comprised by the valve body which a flexible piece part deform | transforms so that the flow path 2f may be narrowed in the case. Moreover, it is good also as a valve mechanism comprised by the elastic film | membrane which becomes narrow like the opening | mouth of a drawstring bag and deform | transforms so that the flow path 2f may be narrowed when a wire is pulled.

1: Sprinkler head 2: Head body 2a: Water outlet 2b: Inlet
2c: Connection part 2d: Water discharge pipe 2e: Flange 2f: Fire extinguishing water flow path 3: Valve body
4: Thermal decomposition mechanism 4a: Ball 4b: Slider 4c: Balancer 4d: Belleville spring 4e: Thermal element 4f: Flange 4g: Plunger 4h: Set screw 4i: Heat collecting plate 4j: Central recess 5: Water stop mechanism 5a: Valve body 5b: Through-hole 5c: Sleeve 5d: Inlet 5e: Outlet 5f: Drive mechanism 5g: Drive shaft 5h: Drive lever 5i: Spring member 5j: Reverse rotation prevention mechanism 5k: Ratchet gear 5m: Ratchet arm 5n: Spring Member 5w: Peripheral wall 6: Activation wire 7: Frame 7a: Inner flange 8: Moving mechanism 8a: Spring member

Claims (5)

A head body having a water outlet at the tip; a valve body that closes the water outlet; and a thermal decomposition mechanism that always supports the valve body and decomposes by heat in the event of a fire. In the sprinkler head that decomposes and releases the fire water from the water outlet by opening the water outlet by the valve body,
A water stop mechanism provided in the head main body for stopping the flow of the fire-extinguishing water to the water outlet when the valve body is opened and the fire water is discharged from the water outlet; A sprinkler head, further comprising an activation wire for operating a mechanism portion, the activation wire hanging below the head body when the thermal decomposition mechanism portion is disassembled.   The said water stop mechanism part has a valve body which rotates by the said starting wire, and stops the flow of the fire-extinguishing water to the said water discharge port, when the valve body rotates. The sprinkler head according to 1.   The water stop mechanism has a valve body that moves in a direction crossing the flow path to the water discharge port by the activation wire, and stops the flow of the fire-extinguishing water to the water discharge port by moving the valve body. The sprinkler head according to claim 1, wherein:   One end of the activation wire is locked to the water stop mechanism and the other end is locked to the thermal decomposition mechanism. The sprinkler head according to any one of claims 1 to 3, wherein the sprinkler head is suspended from the water stop mechanism portion below the head main body when dropped.   The water stop mechanism part is released from a state in which the flow of the fire-extinguishing water to the water outlet is stopped by the thermal decomposition mechanism part being decomposed and dropped, and the fall load transmitted through the activation wire. The sprinkler head according to claim 4, wherein the sprinkler head operates in a state.

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