JP5830418B2 - Sprinkler head fitting - Google Patents

Description

  The present invention relates to a sprinkler head fitting for connecting a sprinkler head to a fire extinguishing pipe of a sprinkler fire extinguishing equipment in which the inside of the fire extinguishing pipe is always at a negative pressure.

  For the purpose of preventing damage caused by water that is released when the sprinkler head malfunctions, it is equipped with an open valve that causes the fire alarm of the fire detector to open, and the secondary side pipe (hereinafter referred to as the open valve) There is negative pressure type sprinkler fire extinguishing equipment that always uses negative pressure (fire extinguishing pipe), and prevents the sprinkler head from malfunctioning even if water enters the fire extinguishing pipe.

  In such a negative pressure type sprinkler fire extinguishing equipment, unless the fire detector detects a fire, the open valve is not opened, and the negative pressure state in the fire extinguishing pipe is controlled, so that the fire extinguishing is controlled. Even if the sprinkler head connected to the piping is accidentally opened due to damage, water in the fire extinguishing piping is sucked in by negative pressure and water is not discharged from the sprinkler head that has been accidentally opened. (See Patent Document 1).

International Publication No. WO00 / 61238

  However, a predetermined negative pressure may not be obtained at the position of the sprinkler head connected to the end of the fire extinguishing pipe. In such a case, if the sprinkler head malfunctions, water may leak from the malfunctioning sprinkler head.

  For example, when the downfall pipe that connects the sprinkler head to the main pipe of the fire extinguishing pipe is long and water is accumulated in the downdraft pipe, if the accumulated water drop exceeds the suction force due to negative pressure, Negative pressure cannot be maintained up to the sprinkler head. Even if the length of the downpipe does not become a problem, the negative pressure cannot be maintained if the suction device that makes negative pressure in the fire extinguishing pipe breaks down.

  If the sprinkler head malfunctions in such a case, if water accumulates in the downcomer pipe, the water will flow out from the malfunctioning sprinkler head even when there is no fire, and the target to be protected Invite water damage.

However, there is no means for determining whether or not a predetermined negative pressure can be maintained at the position of the sprinkler head, and it has not been easy to cope with it.
In view of the above circumstances, the present invention can easily determine whether or not a predetermined negative pressure is maintained at the position of the sprinkler head connected to the negative pressure type sprinkler fire extinguishing equipment as described above. The object is to obtain a sprinkler head fixture.

The present invention, so as not to be water discharge even opened incorrectly sprinkler head, negative pressure at all times a secondary side of the release valve by suction means to cause the opening of the fire alarm fire detector In a sprinkler head fixture interposed between a fire extinguishing pipe of a negative pressure type sprinkler fire extinguishing equipment and a sprinkler head connected to the fire extinguishing pipe, a pipe connecting port connected to the fire extinguishing pipe at an upper end, and a lower end A head connection port to which the sprinkler head is connected, and pressure detection means on a side surface, the pressure detection means comprising: an internal opening communicating with the interior of the sprinkler head fixture; and the internal opening provided in a recess communicating, and bellofram to stretch by internal pressure of the sprinkler head fittings, negative pressure is maintained extended by the predetermined said bellofram A display means for displaying whether it is a, when said negative pressure inside the sprinkler head fixture is lost, by the bellofram extending toward the outside by the restoring force due to elasticity, of the sprinkler head position The negative pressure disappears , and it is easy to visually recognize that there is a risk of water leakage if the sprinkler head malfunctions .

  Further, according to the present invention, the display means includes a transparent member that is disposed on the surface of the sprinkler head fixture, and whose inner surface is surface-finished in a frosted glass shape and is always clouded and visually recognized, When elongates and adheres, the cloudiness disappears and the adhered belofram is visually recognized.

  Further, according to the present invention, the display means includes an external opening that communicates with the outside of the sprinkler head fixture, and a protrusion that extends from the tip of the bellophram toward the external opening. It is characterized by not projecting from the external opening at all times and projecting from the external opening when the belofram is extended.

Further, according to the present invention, the display means includes an electrode that conducts when the bellophram extends to a position of an external opening that communicates with the outside of the sprinkler head fixture, and a negative pressure inside the sprinkler head fixture. When the light disappears, the electrode is made conductive, and an indicator lamp connected to the electrode together with a power source is turned on or blinked.

  Further, the present invention is characterized in that the indicator lamp is provided in a window provided in a sealing plate that covers a gap between a sprinkler head attached to the head connection port and a ceiling plate.

  Further, according to the present invention, the indicator lamp includes a battery as a power source for driving the light emitting unit, and a flashing circuit for periodically flashing the light emitting unit, and the light emission time of the light emitting unit by the flashing circuit is turned off. It is set to be shorter than time, and the light emitting unit can be driven for a longer time than continuous lighting.

  According to the configuration described in claim 1 of the present invention, when the negative pressure at the position of the closed sprinkler head attached to the sprinkler head fixture according to the present invention disappears, the fact is displayed by the pressure detection means. The effect that the negative pressure at the sprinkler head position has disappeared can be easily visually confirmed.

  Further, according to the configuration of the second aspect, when the negative pressure at the position of the closed sprinkler head attached to the sprinkler head fixture according to the present invention disappears, the display means is always white and cloudy and can be visually confirmed. Therefore, it is possible to easily visually recognize that the negative pressure at the sprinkler head position has disappeared.

  Further, according to the configuration described in claim 3 of the present invention, when the negative pressure at the position of the closed sprinkler head attached to the sprinkler head fixture according to the present invention disappears, the protrusion that does not normally protrude is displayed. Since it protrudes from the means, it is possible to easily visually recognize that the negative pressure at the sprinkler head position has disappeared.

  In addition, according to the configuration of claim 4 of the present application, when the negative pressure at the position of the closed sprinkler head attached to the sprinkler head fixture according to the present invention disappears, the indicator lamp lights up or blinks and displays. The effect that the negative pressure at the sprinkler head position has disappeared can be easily visually confirmed.

  Moreover, according to the structure of Claim 5 of this application, even if the sprinkler head fixture which concerns on this invention is arrange | positioned by the ceiling back, the lighting or blinking of the said indicator lamp is carried out by the sealing plate part attached to the ceiling surface. There exists an effect that it can visually recognize easily by visual observation.

  Moreover, according to the structure of Claim 6 of this application, since power consumption is reduced, there exists an effect that the said indicator lamp can be driven for a long time.

It is an external view of the sprinkler head fixture 1 according to Embodiment 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of the sprinkler head fixture 1 concerning Embodiment 1 of this invention, A figure (a) is a cross section containing the pressure detection means 2 of the sprinkler head fixture main body 1, A figure (b) is predetermined negative. FIG. 4C is an enlarged view of a cross section of the pressure detecting means 2 in the pressure state, and FIG. 3C is an enlarged view of a cross section of the pressure detecting means 2 in a state where the predetermined negative pressure state is not satisfied. It is an external view of the sprinkler head fixture 10 according to Embodiment 2 of the present invention. FIG. 4 is a longitudinal sectional view of a sprinkler head mounting tool 10 according to Embodiment 2 of the present invention, in which FIG. (A) is a cross section including the pressure detection means 20 of the sprinkler head mounting body 10, and FIG. FIG. 4C is an enlarged view of a cross section of the pressure detecting means 20 in the pressure state, and FIG. 5C is an enlarged view of a cross section of the pressure detecting means 20 in a state where the predetermined negative pressure state is not satisfied. It is a longitudinal cross-sectional view of the sprinkler head mounting tool 100 concerning Embodiment 2 of this invention, A figure (a) is a cross section containing the pressure detection means 200 of a sprinkler head main body, A figure (b) is in a predetermined negative pressure state. FIG. 4C is an enlarged view of a cross section of the pressure detecting means 200, and FIG. 3C is an enlarged view of the cross section of the pressure detecting means 200 in a state where the predetermined negative pressure state is not reached. It is a figure which shows the state which attached the sprinkler head fixture 100 which concerns on Embodiment 3 of this invention to the sprinkler head 7 arrange | positioned on the ceiling surface, and was connected to the display means 12 provided in the sealing plate 8. FIG. It is an external view of the sprinkler head fixture 101 which concerns on Embodiment 4 of this invention. It is a longitudinal cross-sectional view of the sprinkler head fixture 101 which concerns on Embodiment 4 of this invention. It is an exploded view of the sprinkler head fixture 101 which concerns on Embodiment 4 of this invention.

  The sprinkler head fitting according to the present invention includes an open valve that causes a fire alarm of a fire detector to open, for the purpose of preventing damage caused by water that is released when the sprinkler head malfunctions, Fire extinguishing pipe of negative pressure type sprinkler fire extinguishing equipment equipped with suction means that always sucks the secondary side pipe (hereinafter referred to as fire extinguishing pipe) of the open valve into negative pressure and stops suction from the fire extinguishing pipe in case of fire The sprinkler head is provided so as to be connected to the fire extinguishing pipe.

The negative pressure type sprinkler fire extinguishing equipment to be connected is a wet type in which the fire extinguishing pipe is filled with fire extinguishing water (see, for example, International Publication No. WO 00/61238), the fire extinguishing pipe is not filled with fire extinguishing water, and negative pressure air. Any of the dry methods (for example, refer to Japanese Utility Model Laid-Open No. 1-130756 and Japanese Patent Application Laid-Open No. 2011-152269) may be used. Furthermore, it is desirable that the sprinkler fire extinguishing equipment to be connected is the negative pressure type and the pre-actuated sprinkler fire extinguishing equipment in order to prevent water loss due to malfunction of the sprinkler head. The pre-actuated sprinkler fire extinguishing equipment is a sprinkler fire extinguishing equipment that has a pre-acting valve that is an open valve that opens due to the fire alarm of the fire detector, and that the sprinkler head is not opened to discharge water. There is a general type in which an open valve is opened in conjunction with a fire alarm of a fire detector (see, for example, International Publication No. WO00 / 61238), a fire alarm of a fire detector, and the heat of the fire A type in which the open valve is opened by detecting that the sprinkler head is opened and the pressure in the fire extinguishing pipe is changed (for example, see Japanese Utility Model Laid-Open No. 1-130756 and Japanese Patent Application Laid-Open No. 2011-152269); There is.
[Embodiment 1]

First, the configuration of the sprinkler head mounting tool 1 according to Embodiment 1 will be described with reference to FIGS. 1 and 2.
The sprinkler head mounting tool 1 has a pipe connection port 3 that is screwed to a fall pipe 6 connected to a fire extinguishing pipe of a sprinkler fire extinguishing equipment that is a connection target, and a closed sprinkler head 7 is screwed. It has a head connection port 4 and has pressure detection means 2 on the side surface (see FIGS. 1 and 2A).

  The pressure detection means 2 includes a window portion 2a which is a display means formed of a transparent member whose inner surface is processed into a ground glass shape, a bellophram 2c formed of a substantially cylindrical elastomer with a closed end portion, The sprinkler head fixture 1 is housed in a side surface of the sprinkler head fixture 1, and the outer side of the sprinkler head fixture 1 is configured with a recess that is opened in a substantially circular shape.

  The window portion 2a is formed in a substantially cylindrical shape with a closed end portion, and its inner diameter is larger than the outer diameter of the bellophram 2c, and its outer diameter is smaller than the inner diameter of the recess. And the height is made to be the same as the outer peripheral surface of the sprinkler head mounting tool 1 when fitted into the recess. Or you may make the window part 2a protrude from the outer peripheral surface of the sprinkler head fixture 1 as the height beyond it.

  The recess of the sprinkler head fixture 1 is provided with an internal opening 2d, and the internal opening 2d communicates with the inside of the sprinkler head fixture 1. Further, the window 2a is provided with an external opening 2b, and the inside of the window 2a that is fitted and fixed in the recess communicates with the outside of the sprinkler head fixture 1 through the external opening 2b. Yes.

  The external opening 2b provided in the window 2a and the internal opening 2d provided in the recess are provided so as to communicate with each other, and the space between them is shielded by the bellophram 2c. That is, the bellophram 2c is sandwiched between the concave portion of the sprinkler head mounting tool 1 main body and the peripheral portion of the window portion 2a, and is fixed so as to shield between the outer opening portion 2b and the inner opening portion 2d. Is done.

  Since the space between the external opening 2b and the internal opening 2d is thus shielded, water does not leak from the external opening 2b when water is discharged from the sprinkler head connected to the sprinkler head mounting tool 1.

  As for the method of attaching the window portion 2a to the main body of the sprinkler head fixture 1, the periphery of the window portion 2a may be adhered to the concave portion of the main body of the sprinkler head 1, or the window portion 2a is attached to the concave portion of the sprinkler head fixture 1. The window part 2a may be clamped with the sprinkler head mounting tool 1 by a pressing plate outside the window part 2a (not shown) fixed to the sprinkler head 1.

  And between the recessed part of sprinkler head fixture 1 main body and window part 2a, when the inside of sprinkler head fixture 1 is not a negative pressure, it is provided so that the front-end | tip part surface of Bellofram 2c may contact the inner surface of window part 2a. Due to the pressure difference between the external opening 2b and the internal opening 2d, that is, the pressure difference between the inside and the outside of the sprinkler head fitting 1, the bellophram 2c is formed between the external opening 2b and the internal opening 2d. It can be expanded and contracted.

  Since the window portion 2a is formed of a transparent member whose inner surface is processed into a ground glass shape, the window portion 2a itself is a member that appears cloudy. When the bellophram 2c comes into contact with the inner surface of the window portion 2a, the cloudiness disappears, and the bellophram 2c can be visually recognized from the outside of the window portion 2a.

  Next, operation | movement of the sprinkler head fixture 1 in this Embodiment is demonstrated.

  When the inside of the sprinkler head fitting 1 is at a predetermined negative pressure, the belofram 2c is sucked from the internal opening 2d and contracts, and comes into close contact with the internal opening 2d (see FIG. 2B). At this time, since the bellophram 2c is separated from the inner surface of the window portion 2a, the window portion 2a viewed from the outside is visually recognized as cloudy.

  When the negative pressure inside the sprinkler head fitting 1 disappears, the differential pressure between the internal opening 2d and the external opening 2b disappears, so that the Bellofram 2c is on the side of the external opening 2b by the restoring force due to its own elasticity. And is in close contact with the inner surface of the window portion 2a (see FIG. 2C). When the bellophram 2c formed of an elastomer extends and adheres to the inner surface of the window portion 2a that has been processed into a frosted glass shape, the cloudiness of the window portion 2a disappears and the adherent bellophram 2c is visually recognized from the outside. As a result, the window portion 2a of the pressure detecting means 2 acts as a display means for indicating that the negative pressure in the sprinkler head fixture 1 has disappeared, and the position of the closed sprinkler head 7 attached to the sprinkler head fixture 1 It can be easily visually confirmed that the negative pressure has disappeared.

The external opening 2b of the window 2a can be omitted.
That is, the bellophram 2c communicates with the inside of the sprinkler head fixture 1 through the internal opening 2d. When the inside of the sprinkler head fixture 1 has a negative pressure, the bellophram 2c is sucked from the internal opening 2d. When the negative pressure in the sprinkler head fitting 1 disappears, the belofram 2c expands toward the window 2a by the restoring force of its own elasticity. What is necessary is just to make it closely_contact | adhere to the inner surface of the part 2a.
[Embodiment 2]

  The configuration of the sprinkler head mounting tool 10 according to Embodiment 2 will be described with reference to FIGS. 3 and 4. In addition, the same code | symbol is attached | subjected about the location with the same structure as Embodiment 1, and the description is abbreviate | omitted.

  The difference between the second embodiment and the first embodiment is only the pressure detection means 20. The pressure detection means 2 of the first embodiment shown in FIG. 1 is replaced with the pressure detection means 20 of the present embodiment.

  The pressure detecting means 20 includes a bellophram 20c having a protrusion 20e at the tip, a bellofram fixing member 20f, a protrusion support 20g having an external opening 20b through which the protrusion 20e passes, and a sprinkler head mounting tool that houses these. 10, a recess provided on the side surface, a pressing plate 20 h, and a screw 20 i.

  The recess has an internal opening 20d that communicates with the inside of the sprinkler head fixture 10, and the protrusion support portion 20g has an external opening 20b that communicates with the outside of the sprinkler head fixture 10, which communicate with each other. To be provided. The bellophram 20c is provided so as to shield the openings 20b and 20d.

  The belofram 20c is formed of a substantially cylindrical elastomer having a closed end, and a protrusion 20e formed in a rod shape is projected outward from the substantially cylindrical end. On the peripheral edge of the opening side end portion of the substantially cylindrical shape, there is a hook-shaped portion protruding in a hook shape. The hook-shaped portion is sandwiched between the main body of the sprinkler head fixture 10 and the bellophram fixing member 20f having an opening larger than the diameter of the bellophram 20c. The thickness of the bellophram fixing member 20f formed in a substantially cylindrical shape is the same as the distance between the outer opening 20b and the inner opening 20d, and when the inside of the sprinkler head mounting tool 10 is not negative pressure, the bellofram 20c. The tip end surface is provided in contact with the inner surface of the protrusion support portion 20g, and the space between the outside and inside of the sprinkler head mounting tool 10 allows the bellophram 20c to expand and contract.

  Further, the bellofram fixing member 20f is sandwiched between the plate portion on the periphery of the external opening portion of the protrusion support portion 20g having the external opening portion 20b through which the protrusion portion 20e of the bellophram 20c passes and the main body of the sprinkler head mounting tool 10. Further, the protrusion support portion 20g is sandwiched between the sprinkler head fixture 10 and the body of the sprinkler head fixture 10 together with the bellophram fixing member 20f by a pressing plate 20h fixed to the sprinkler head fixture 1 with screws 20i from the outside. In order to be visible from the outside of the fixture 10, the sprinkler head fixture 10 is provided at the same height or higher than the outer peripheral portion.

  When the inside of the sprinkler head fixture 10 has a predetermined negative pressure, the belofram 20c is sucked from the internal opening 20d and contracts, and comes into close contact with the internal opening 20d. At this time, the protrusion 20e at the tip of the bellofram 20c is set to a length that does not protrude from the external opening 20b provided in the protrusion support 20g. That is, it is set so that it cannot be seen from the outside (see FIG. 4B).

  When there is no differential pressure between the inner opening 20d and the outer opening 20b, the belofram 20c extends toward the outer opening 20b due to its own elastic restoring force. Then, the protrusion 20e provided at the tip is set so as to protrude from the external opening 20b (see FIG. 4C).

  Next, the operation of the sprinkler head fixture 10 configured as described above according to the second embodiment will be described.

  As is apparent from the above configuration, the space between the main body of the sprinkler head fixture 10 and the inner surface of the protrusion support portion 20g can be expanded and contracted, that is, the space between the external opening 20b and the internal opening 20d. There is a height corresponding to the separation distance and an opening portion of the bellophram fixing member 20f larger than the diameter of the bellophram 20c, and a pressure difference between the outer opening portion 20b and the inner opening portion 20d, that is, the inside of the sprinkler head mounting tool 10. The bellophram 20c can be expanded and contracted between the external opening 20b and the internal opening 20d by a pressure difference with the outside.

  When the inside of the sprinkler head fixture 10 is at a predetermined negative pressure, the belofram 20c is sucked from the internal opening 20d and contracts, and is in close contact with the internal opening 20d. At this time, the protrusion 20e at the tip of the bellophram 20c is set so as not to protrude from the external opening 20b provided in the protrusion support 20g, that is, not visible from the outside. The protrusion 20e is not visible from the outside at a constant negative pressure.

  When the negative pressure inside the sprinkler head fitting 10 disappears, the differential pressure between the inner opening 20d and the outer opening 20b disappears, so that the bellofram 20c is caused by its own elastic restoring force to cause the protrusion support 20g. Until it is in close contact with the inner surface of the outer opening 20b. At this time, the protrusion 20e provided at the tip of the bellofram 20c is also moved toward the external opening 20b and protrudes from the external opening 20b. Therefore, the protrusion 20e of the pressure detection means 20 is set. And the protrusion support portion 20g act as a display means for indicating that the negative pressure inside the sprinkler head mounting tool 10 has disappeared, and the negative pressure at the position of the closed sprinkler head 7 attached to the sprinkler head mounting tool 10 disappears. This can be easily visually confirmed.

In addition, although the pressure detection means 20 was attached to the main body of the sprinkler head fixture 10 using the screw 20i and the pressing plate 20h, the pressure detection means 20 may be configured as follows.
That is, the side surface of the sprinkler head mounting tool 10 is formed in a ring shape, and a cylindrical mounting member (not shown) whose front end is closed, which can be screwed to the portion, is provided. The mounting member has a bellophram 20c and a bellophram fixing member 20f. The pressure detecting means is configured by providing a recess capable of accommodating the protrusion, and after receiving the belofram fixing member 20f, a protrusion supporting portion having a male screw formed on the outer periphery is coupled to a female screw formed inside the mounting member. An inner opening 20d is provided on the closing side of the mounting member, and a jig insertion hole for rotating the mounting member is formed on the opposite side.
[Embodiment 3]

  The configuration of the sprinkler head mounting tool 100 according to Embodiment 3 will be described with reference to FIGS. 5 and 6. The third embodiment is different from the second embodiment in that the pressure detection means 200, the display lamp 12 as a display means electrically connected to the pressure detection means 200, and the ceiling provided with the display lamp 12 On the plate. In addition, the same code | symbol is attached | subjected about the location with the same structure as Embodiment 2, and the description is abbreviate | omitted.

  The belofram 200c is different from the belofram 20c of the second embodiment in that the protrusion 20e is eliminated and the tip of the belofram 200c formed of an elastomer having a closed tip is substantially made of a conductive material. The conductive plate 200j formed in a disk shape is provided.

  Correspondingly, in place of the protrusion supporting portion 20g of the second embodiment, two electrodes 200e facing the conductive plate 200j are provided in the vicinity of the outer opening 200b corresponding to the outer opening 20b of the second embodiment. An electrode support member 200g provided to be separated is provided.

  Corresponding to the above changes, the pressing plate 20h is the pressing plate 200h, the bellophram fixing member 20f is the bellophram fixing member 200f, the internal opening 20d is the internal opening 200d, and the screw 20i is the screw 200i. Only the sign is changed.

  Further, the electrode 200 e is electrically connected to the indicator lamp 12 by two electric wires 11. The indicator lamp 12 includes a light emitting element 12a such as an LED as a light emitting unit, a battery 12b as a power source, and a flashing circuit (not shown), and a sprinkler head 7 and a ceiling plate C installed on the ceiling surface. It attaches to the sealing plate 8 which covers the gap | interval of this. Then, the light emitting element 12a is installed so that the display window 9 is positioned in the direction in which the light emitting element 12a projects light, and the light emitted from the light emitting element 12a is transmitted through the display window 9 provided on the sealing plate 8 to the ceiling plate 8. It is designed to irradiate downward. The display window 9 may be formed of a transparent member. However, if the display window 9 is formed of a member or structure that diffuses light, the directivity can be lost for visual recognition. It becomes easy to visually recognize.

  Alternatively, the display window 9 may be formed in a ring shape with the center of the sealing plate 8 as the center so that the entire ring-shaped display window shines. If comprised in this way, since it becomes easy to visually recognize light emission from all directions, visibility improves remarkably.

  The battery 12b is preferably a battery with low self-discharge, such as a lithium battery. In other words, in the periodic inspection cycle of about once a year, periodic replacement is possible by inspection. However, if the power is consumed in a time shorter than the inspection interval due to self-discharge, power is actually consumed when the indicator lamp 12 is driven. This is because there is a possibility that it does not remain.

  In addition, a flashing circuit for periodically flashing the light emitting element 12a is provided, and by setting the light emitting time of the light emitting element 12a to be shorter than the turn-off time, the power consumption when driving the indicator lamp can be greatly reduced. At least the light emitting element 12a can be driven for a longer time than continuous lighting.

  In addition, when the inside of the sprinkler head mounting tool 100 has a predetermined negative pressure, the belofram 200c is sucked and contracted from the internal opening 200d and is in close contact with the internal opening 200d. At this time, the conductive plate 200j provided at the tip of the bellophram 200c is set so as to be separated from the electrode 200e (see FIG. 5B).

  In addition, when there is no differential pressure between the internal opening 200d and the external opening 200b, the belofram 200c extends toward the external opening 200b due to its own elastic restoring force. At the same time, the conductive plate 200j provided at the tip is set so as to contact the electrode 200e (see FIG. 5C).

  Next, the operation of the sprinkler head mounting tool 100 according to Embodiment 3 configured as described above will be described.

  The inside of the sprinkler head mounting tool 100 is always maintained at a predetermined negative pressure, and the belofram 200c is sucked through the internal opening 200d, so that the belofram 200c contracts toward the internal opening 200d and the conductive plate 200j. Is separated from the electrode 200e and does not conduct between the electrodes 200e. Therefore, the indicator lamp 12 is not driven.

  When the negative pressure inside the sprinkler head mounting tool 100 disappears, that is, when the differential pressure between the inner opening 200d and the outer opening 200b disappears, the bellophram 200c is restored to its conductive plate by its own elastic restoring force. The conductive plate 200j is in contact with the two electrodes 200e until the electrode 200e contacts the electrode 200e, so that the two electrodes 200e are electrically connected. In other words, this corresponds to a state where the switch is turned on. Thereby, since the two electric wires 11 connected to the electrode 200e are electrically connected, the indicator lamp 12 having the battery 12b as a power source can be turned on or blinked.

  By operating in this way, it is possible to easily visually recognize that the negative pressure at the position of the closed sprinkler head 7 attached to the sprinkler head fixture 100 has disappeared.

Since the indicator lamp 12 is easier to visually recognize than blinking, and power consumption can be reduced, it is desirable to provide the indicator lamp 12 with a blinking circuit. Furthermore, if the light emission time of the flashing circuit is set shorter than the light extinction time, the power consumption is further reduced, so that the light emitting element 12b can be driven for a much longer time than when the light emitting element 12b is continuously lit.
[Embodiment 4]

  The configuration of the sprinkler head mounting tool 101 according to the fourth embodiment will be described with reference to FIGS. The fourth embodiment is different from the first embodiment in that the window 2a as the display means is provided in a strip shape over the entire circumference of the outer periphery of the sprinkler head fixture 101 so that the window 2a can be viewed from any direction. The sprinkler head mounting tool 101 is divided into a main body upper part 101a and a main body lower part 101b so as to sandwich and fix a substantially cylindrical pressure detecting means 201 including the window part 201a. There is. In addition, the same code | symbol is attached | subjected about the location with the same structure as Embodiment 1, and the description is abbreviate | omitted.

  The pressure detecting means 201 has a cylindrical shape having the same outer diameter as the sprinkler head mounting tool 101 and has an outer opening 201b that is a plurality of openings communicating the inner peripheral portion and the outer peripheral portion. A window portion 201a, which is a display means formed of a transparent member, a bellophram 201c formed of an elastomer in a substantially tire shape so as to be inscribed in the inner surface of the window portion 201a, and an inner peripheral portion of the bellophram 201c And a bellophram fixing member 201k having an outer peripheral portion formed substantially in the shape of a tire wheel.

  The belofram 201c is inscribed in a donut shape inwardly at the upper and lower ends of the cylindrical portion inscribed in the inner surface of the window portion 201a and having a height smaller than the height of the window portion 201a. The disk portion is formed in a substantially tire shape, and has a flange portion protruding inwardly in parallel with the cylindrical portion at the inner peripheral side end portion of the disk portion.

  The bellophram fixing member 201k is substantially cylindrical with an outer diameter smaller than the inner surface of the cylindrical portion of the bellophram 200c, and the height is set such that the upper and lower end surfaces of the outer periphery of the substantially cylindrical shape are inscribed in the flange portion of the bellophram 201c. The upper and lower end surfaces of each of the bellophrams 201c are opened with an inner diameter smaller than the opening of the disk part and penetrate vertically. The inner surface of the opening that penetrates the upper and lower ends of the bellophram fixing member 201k is threaded so that the main body upper part 101a and the main body lower part 101b are screwed to the upper end side and the lower end side, respectively. A plurality of internal openings 201d are provided on the inner surface, and the inside and outside of the bellophram fixing member 201k are communicated (see FIG. 5C).

  The pressure detection means 201 concentrically covers the peripheral portion of the bellophram fixing member 201k with the bellophram 201c, covers the cylindrical portion of the bellophram 201c with the window portion 201a, and has a stepped portion. It is formed between the flanges 101c and 101d.

  Then, from the upper end side of the pressure detecting means 201, the main body upper part 101a threaded on the outer peripheral side is screwed to the upper end of the belofram fixing member 201k, the upper end side flange 101c is sandwiched, and the lower end side of the pressure detecting means 201 Then, the lower body portion 101b whose outer peripheral portion is threaded is screwed to the lower end of the belofram fixing member 201k and assembled so as to sandwich the flange 101d on the lower end side. That is, the flange 101c has an opening that allows the threaded portion of the main body upper portion 101a to pass through so that the main body upper portion 101a can be screwed to the bellophram fixing member 201k, and the flange 101d screws the main body lower portion 101b to the bellophram fixing member 201k. In order to be able to do so, the screwed portion of the main body lower portion 101b has an opening that can be penetrated.

  The step portions of the flanges 101c and 101d correspond to the difference between the height of the window portion 201a and the height of the bellophram 201c when the pressure detection means 201 is assembled by combining the heights of both step portions. Actually, the combined length of the step portions of the flanges 101c and 101d is set to be slightly larger than the difference between the height of the window portion 201a and the height of the bellowram 201c, and the outer peripheral portions of the flanges 101c and 101d. When the window portion 201a is sandwiched, the upper and lower end portions of the bellophram 201c are pressed against the outer peripheral upper surface and the outer peripheral lower surface of the bellophram fixing member 201k at the stepped portions projecting inward of the flanges 101c and 101d. . That is, the bellophram 201c formed of elastomer is sandwiched between the bellophram fixing member 201k and the flanges 101c and 101d, and is compressed and sealed (see FIG. 8).

  The sprinkler head fixture 101 assembled in this way acts so that the cylindrical portion of the belofram 201c is in contact with the inner surface of the window portion 201a when the inside thereof is not under negative pressure. There is a gap between the bellophram 201c and the bellophram fixing member 201k, and the external opening is caused by the pressure difference between the external opening 201b and the internal opening 201d, that is, the pressure difference between the inside and the outside of the sprinkler head fixture 101. Between the portion 201b and the internal opening 201d, the bellophram 201c expands and contracts in the diametrical direction so that the cylindrical portion can move.

  Since the window 201a is formed of a transparent member whose inner surface is processed into a ground glass shape, the window itself is a member that appears clouded. When the bellophram 201c contacts the inner surface of the window portion 201a, the cloudiness disappears, and the bellophram 201c can be visually recognized from the outside of the window portion 201a.

  Next, the operation of the sprinkler head mounting tool 101 in the present embodiment will be described.

  When the inside of the sprinkler head attachment 101 is at a predetermined negative pressure, the belofram 201c is sucked from the internal opening 201d and contracts, as in the first embodiment, and is in close contact with the internal opening 201d. At this time, since the belofram 201c is separated from the inner surface of the window 201a, the window 201a viewed from the outside is visually recognized as cloudy.

  Even when the negative pressure inside the sprinkler head attachment 101 disappears, the differential pressure between the inner opening 201d and the outer opening 201b disappears as in the first embodiment. Due to the restoring force due to, it expands in the diametrical direction toward the external opening 201b and is in close contact with the inner surface of the window 201a. When the bellophram 201c formed of an elastomer expands and adheres to the inner surface of the window portion 201a that has been processed into a ground glass shape, the cloudiness of the window portion 201a disappears and the closely attached bellophram 201c is visually recognized from the outside. As a result, the window portion 201a of the pressure detecting means 201 acts as a display means for indicating that the negative pressure in the sprinkler head mounting tool 101 has disappeared, and the position of the closed sprinkler head 7 attached to the sprinkler head mounting tool 101. The disappearance of the negative pressure can be easily visually recognized from any surrounding direction.

The external opening 201b of the window 201a may not be provided.
That is, the bellofram 201c communicates with the inside of the sprinkler head fixture 101 through the internal opening 201d. When the inside of the sprinkler head fixture 101 has a negative pressure, the bellofram 201c is sucked from the internal opening 201d. When the negative pressure in the sprinkler head fixture 101 disappears, the belofram 201c expands toward the window 201a due to its own elastic restoring force. What is necessary is just to make it closely_contact | adhere to the inner surface of the part 201a.

  In addition, the description content of the patent document described as a prior art can be introduce | transduced or used by reference as description of the technical element described in this specification.

1, 10, 100, 101 Sprinkler head fitting,
2, 20, 200, 201 pressure detection means, 2a, 201a window,
2c, 20c, 200c, 201c belofram,
20e protrusion, 200e electrode,
20f 200f Bellofram fixing member,
20b electrode support member, 20i conductive plate,
2b, 20b, 200b, 201b external opening,
2d, 20d, 200d, 201d internal opening,
20g protrusion support part, 20f, 200f, 201k belofram fixing member,
20h, 200h holding plate, 20i, 200i screw,
100a upper body, 100b lower body, 100c, 100d flange,
3 Piping connection port, 4 Head connection port,
12 indicator lamp, 12a light emitting element, 12b battery, 11 electric wire,
6 Falling pipe, 7 Closed sprinkler head,
8 Sealing plate, 9 Display window, C ceiling

Claims (6)

Spray incorrectly linked La head so as not to be water discharge even opened, the negative always a secondary side of the open valve to cause the opening of the fire alarm fire detector is to be a negative pressure state by a suction means In a sprinkler head fixture interposed between a fire extinguishing pipe of a pressure type sprinkler fire extinguishing equipment and a sprinkler head connected to the fire extinguishing pipe,
A pipe connection port connected to the fire extinguishing pipe at the upper end, a head connection port connected to the sprinkler head at the lower end, and a pressure detection means on the side surface,
The pressure detecting means includes
An internal opening communicating with the interior of the sprinkler head fixture;
A bellophram that is provided in a recess communicating with the internal opening and expands and contracts by an internal pressure of the sprinkler head fixture;
Display means for displaying whether or not a predetermined negative pressure is maintained by the expansion of the bellophram;
Have
When the negative pressure inside the sprinkler head fitting disappears, the negative pressure at the sprinkler head position disappears due to the bellophram that extends outward due to elastic restoring force, and water leaks if the sprinkler head malfunctions. A sprinkler head mounting tool characterized in that there is a possibility that it can be easily visually confirmed.   The display means includes a transparent member that is disposed on the surface of the sprinkler head fixture, and whose inner surface is processed into a ground glass shape and is always clouded and visible, and when the bellophram expands and adheres to the inner surface. The sprinkler head mounting tool according to claim 1, wherein the white turbidity disappears and the closely attached belofram is visually recognized.   The display means includes an external opening that communicates with the outside of the sprinkler head fixture, and a protrusion that extends from the tip of the belofram toward the external opening, and the protrusion is normally the external opening. The sprinkler head mounting tool according to claim 1, wherein the sprinkler head mounting tool protrudes from the external opening when the belofram extends without protruding from the portion. The display means includes an electrode that conducts when the bellophram extends to a position of an external opening communicating with the outside of the sprinkler head fixture, and the negative pressure inside the sprinkler head fixture disappears. The sprinkler head mounting tool according to claim 1 , wherein an electrode is made conductive, and an indicator lamp connected to the electrode together with a power source is turned on or blinked.   5. The sprinkler head mounting tool according to claim 4, wherein the indicator lamp is provided in a window provided in a sealing plate that covers a gap between the sprinkler head attached to the head connection port and the ceiling plate. The indicator lamp includes a battery as a power source for driving the light emitting unit, and a flashing circuit for periodically flashing the light emitting unit, and the light emitting time of the light emitting unit by the flashing circuit is set shorter than the turn-off time. The sprinkler head mounting tool according to claim 4 or 5, wherein the light emitting unit can be driven for a longer time than when the light emitting unit is continuously lit.