JP6246045B2 - Sprinkler head - Google Patents

Description

  The present invention relates to a sprinkler head.

  A conventional sprinkler head includes a main body connected to a pipe through which fire extinguishing water flows, a valve body that closes the water outlet of the main body, a frame that is attached to the lower side of the main body, a mechanism that closes the valve body, and solder. Have been proposed which have a heat sensitive plate for transferring heat to the surface (for example, see Patent Documents 1 and 2).

  The mechanism that closes the valve body described in Patent Document 1 regulates a slider in which a disc spring for biasing the valve body is installed, a ball (spherical portion) restrained from above by the slider, and the movement of the ball And a set screw in which the slider and the balancer are inserted, and a cylinder connected to the set screw and provided with a heat sensitive body (solder or the like). In the sprinkler head described in Patent Document 1, a cylindrical cylinder is attached to a set screw extending vertically, and the shape of the heat sensitive body is also ring-shaped corresponding to the cylinder shape.

  The mechanism for closing the valve body described in Patent Document 2 includes a ball that is locked to the inner peripheral surface of the water discharge cylinder of the main body, a cylinder that houses the heat sensitive body, and a piston that presses the solder in the cylinder. have. The cylinder described in Patent Document 2 is formed in a bottomed cylindrical shape, and a columnar heat sensitive body is accommodated in a cylindrical recess.

Japanese Patent Laying-Open No. 2009-2226014 (for example, see FIG. 1) JP 2009-291272 A (see, for example, FIG. 1)

  The sprinkler head described in Patent Document 1 is a so-called all-round support type in which a plurality of balls are arranged in a circumferential direction of a balancer on a step portion formed on the inner circumference (all circumference) on the lower end side of the frame. It is a sprinkler head. In the sprinkler head described in Patent Document 1, the shape of the heat sensitive body is a ring shape. In sprinkler heads having a ring-shaped heat sensitive body, the gap between the heat sensitive body and the cylinder is generally large, and the amount of change with time (creep amount) with respect to the load applied to the heat sensitive body is larger than that of a cylindrical heat sensitive body. In addition, the sprinkler head with balls in the thermal decomposition part is more difficult to reduce the load applied to the thermal element (the lever ratio is smaller) than the sprinkler head with two arms in the thermal decomposition part, and the thermal element creeps. The structure is easy to do. Therefore, in order to operate the sprinkler head reliably without malfunction even if the creep amount is large, it is necessary to enlarge the heat sensitive element. However, if the heat sensitive element is enlarged, the heat capacity of the heat sensitive element increases and the speed of operation increases. There is a problem that the property is impaired.

  The technique described in Patent Document 2 has a structure in which a plurality of balls are locked to a water discharge cylinder formed in a main body and having a diameter smaller than that of a frame. For this reason, since the technique described in Patent Document 2 is difficult to creep because the shape of the heat sensitive body is a columnar shape, the heat sensitive body can be made smaller, thereby reducing the heat capacity of the heat sensitive body. Although it is excellent in the speed of operation, it is inferior in rigidity as compared with the all-round support type because of the structure in which the ball is locked by the water discharge tube.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sprinkler head that can ensure high speed operation while suppressing the loss of rigidity. .

  The sprinkler head according to the present invention has a main body having a water outlet, a frame connected to the main body, a valve body disposed at the water outlet in the frame, a frame, a balancer and a set screw, A valve body support mechanism for supporting the valve body, a piston provided so as to contact the lower surface side of the balancer, and a cylinder in which a columnar heat-sensitive body pressed against the piston is housed and the lower side of the set screw is connected. It is provided.

In the sprinkler head according to the present invention, the frame has a locking step at the lower end of the inner periphery, the valve body support mechanism is provided on the lower side of the valve body, a slider for supporting the valve body, and a locking step The balancer is provided on the lower side of the slider, and is provided on the inner side of the spherical portion so as to restrict the movement of the spherical portion. The set screw is provided on the slider. with contact to, those that are inserted movably in the balancer.

Sprinkler head according to the present invention, the set screw is formed slit extending downward from the lower surface side of the balancer, the piston is to abut the balancer, the extending portion is inserted into the slit, extending portion of the A first piston having a base to which one end is connected, and a projecting portion extending downward from the base ; a second piston housed in a cylinder whose upper surface is pressed against the first piston and whose lower surface presses the heat sensitive body; It is what has.

The sprinkler head according to the present invention has a main body having a water outlet, a frame connected to the main body, a valve body disposed at the water outlet in the frame, a frame, a balancer and a set screw, A valve body support mechanism for supporting the valve body, a piston pushed downward by a balancer, and a cylinder containing a columnar heat sensitive body pressed against the piston are provided .
In the sprinkler head according to the present invention, the piston has a base portion in which a slit is formed, and the lower side of the set screw is inserted into the slit of the base portion.

  Since the sprinkler head according to the present invention has the above-described configuration, it is possible to ensure the quickness of operation while suppressing the loss of rigidity.

It is a longitudinal cross-sectional view of the sprinkler head which concerns on embodiment of this invention. It is a principal part enlarged view, such as a 1st piston and a 2nd piston shown in FIG. It is explanatory drawing of the 1st piston of the sprinkler head which concerns on embodiment of this invention. It is explanatory drawing of the set screw of the sprinkler head which concerns on embodiment of this invention. It is a disassembled sectional view of the state which looked at the 1st piston of the sprinkler head concerning an embodiment of the present invention, the 2nd piston, and the balancer from the undersurface side of a balancer. It is operation | movement explanatory drawing of the sprinkler head which concerns on embodiment of this invention. It is explanatory drawing of the modification of the sprinkler head which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment.
FIG. 1 is a longitudinal sectional view of a sprinkler head 1 according to the present embodiment. FIG. 2 is an enlarged view of a main part of the first piston 70 and the second piston 90 shown in FIG. FIG. 2 is a view showing a state in which the heat sensitive body 55 made of solder or the like is melted and the balancer 63, the first piston 70, and the second piston 90 are moved downward. The configuration of the sprinkler head 1 will be described with reference to FIGS. 1 and 2.

[Description of configuration]
The sprinkler head 1 includes a head main body 10, a frame 20, a valve body 30, a water sprinkling part 40, and a valve body support mechanism 50 (spherical part holding mechanism 60).

(Head body 10)
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 on the upper side of the flange 13. On the inner side surface of the side, a screw portion 15 for attaching a frame 20 described later is formed.
A cylindrical water discharge cylinder 16 is formed on the inner side of the head body 10 so as to protrude downward. Further, for example, a flat valve seat 17 is formed at the lower end of the water discharge cylinder 16 and is closed by the valve body 30. You may make it provide the step part which the outer periphery of the valve body 30 fits in the lower end part of this water discharge pipe | tube 16. As shown in FIG. In the head body 10, a substantially hole-shaped or ring-shaped space 18 is formed between the lower inner peripheral portion of the flange 13 and the water discharge cylinder 16, and a guide rod 42 described later is formed in the space 18. Is stored.

(Frame 20)
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 spherical portion 61 described later is locked to the locking step portion 22.

(Valve 30)
The valve body 30 is formed in a convex shape, and has a flange portion 31 at the lower portion. The flange portion 31 closes the valve seat 17 of the head body 10. The valve seat 17 is provided with, for example, a Teflon (registered trademark) sheet or a Teflon (registered trademark) coating. A recess 32 is formed in the lower center of the valve body 30 and a head of a set screw 80 described later is inserted. The valve body 30 is supported by a valve body support mechanism 50 described later.

(Watering part 40)
The water sprinkling unit 40 includes a deflector 41, a guide rod 42, and a stopper ring 43 (and the valve body 30).

  The deflector 41 is constituted by a disc having an opening at the center, and is attached to the lower surface of the flange portion 31 of the valve body 30 with the lower portion of the valve body 30 inserted into the opening (fixed). Have been). Further, the deflector 41 is provided with insertion holes 41a (for example, three) into which guide rods 42 (for example, three) are inserted, and the lower end of the guide rod 42 protrudes from the insertion holes 41a. 41 is fixed. Therefore, the valve body 30, the deflector 41, and the guide rod 42 are integrally formed.

  In addition, the attachment state of the deflector 41 to the valve body 30 will be described in detail. The valve body 30 is in contact with the valve seat 17, and has a flange portion 31 for maintaining water stop, and a cylindrical attachment portion protruding below the flange portion 31. The leg part 30A and the groove part 30B are configured by inserting the attachment part of the valve body 30 into the central opening of the deflector 41 and crushing the lower part of the attachment part of the valve body 30. The groove 30B is slightly smaller in diameter than the central opening (hole) of the deflector 41. The leg portion 30A formed on the lower side of the groove portion 30B has a cylindrical shape slightly larger in diameter than the hole diameter of the central opening of the deflector 41. For this reason, the deflector 41 is rotatable when attached to the valve body 30.

  A stepped portion 42a having an enlarged diameter for a stopper is formed at the upper end of the guide rod 42, and a stopper ring 43 formed in a donut shape is attached to the guide rod 42 so as to be movable up and down. The stopper ring 43 is provided with insertion holes (for example, three) through which the guide rod 42 is inserted. The guide rod 42 is attached to the stopper ring 43 so as to be movable downward along the insertion hole of the stopper ring 43 during the water discharge operation. In addition, this insertion hole is formed smaller than the step part 42a. That is, when the guide rod 42 moves downward, the step 42a formed on the upper end side of the guide rod 42 is caught in the insertion hole, so that the guide rod 42 does not fall. The stopper ring 43 is installed on the deflector 41 at the time of monitoring, and is disposed, for example, approximately in the middle of the frame 20 in the height direction.

When the sprinkler head 1 is monitored, the lower surface of the stopper ring 43 is pressed by the coil spring 44 and substantially overlaps the upper surface of the deflector 41. During the water discharge operation, the deflector 41 and the guide rod 42 are lowered, and the step 42a at the upper end of the guide rod 42 is lowered until it hits the stopper ring 43 (see FIG. 6B). The outer diameter of the stopper ring 43 is formed to be larger than the inner diameter of the locking step portion 22 of the frame 20, and when the valve body support mechanism 50 is dropped during the water discharge operation, the stopper ring 43 is pushed by the coil spring 44. The locking step 22 is lowered.
The coil spring 44 has a size (outer diameter) so as to contact the inner peripheral surface of the frame 20, and is provided between the lower part of the outer peripheral part of the head body 10 and the outer peripheral part of the stopper ring 43. Yes. For this reason, even if the coil spring 44 is installed in the frame 20, the limited space in the frame 20 can be used effectively.

  The inner diameter of the hole provided in the center of the stopper ring 43 is slightly larger than the outer diameter of the water discharge cylinder 16. The stopper ring 43 is provided with guide members 43a having an L-shaped cross section at, for example, three locations on the inner peripheral side by bending a part of the inner periphery upward through a notch groove. When the stopper ring 43 is lowered, the stopper ring 43 is guided by the guide member 43a to the outer periphery of the water discharge cylinder 16 formed in the lower portion of the head body 10. Since the guide member 43a is bent upward, it is less likely to cause a watering trouble at the time of water discharge. Note that the number and pitch of the guide members 43a are appropriately set so that the stopper ring 43 can be lowered in a balanced manner.

(Valve support mechanism 50)
The valve body support mechanism 50 includes a heat sensitive part 51, a spherical part holding mechanism 60, a disc spring 64, and a set screw 80, and is provided on the frame 20.

The heat-sensitive part 51 urges the cylinder 53A in which the heat-sensitive body 55 is accommodated, the plurality of heat-sensitive plates 53 formed integrally with the cylinder 53A, and the heat-sensitive body 55 in the cylinder 53A to be pressed downward. A first piston 70 and a second piston 90 are provided. The cylinder 53A has a recess in which the heat sensitive body 55 is accommodated. The cylinder 53A is formed in a cylindrical shape, and the space in which the heat sensitive body 55 is accommodated is also cylindrical. That is, in the present embodiment, the heat sensitive body 55 has a cylindrical shape. Further, the lower end side of the set screw 80 is connected to the upper portion 53A1 of the cylinder 53A by screwing. The heat sensitive plate 53 is a disk-like member formed so as to extend in the horizontal direction from the cylinder 53A. The cylinder 53A and the heat sensitive plate 53 are made of, for example, copper so that heat in a space where the sprinkler head 1 is installed is quickly transmitted to the heat sensitive body 55.
The first piston 70 is provided on the lower side of the balancer 63. The first piston 70 is pushed downward by the balancer 63. The second piston 90 is accommodated in the cylinder 53 </ b> A and is pushed downward by the first piston 70. The second piston 90 presses the heat sensitive body 55 downward.

(Spherical part holding mechanism 60)
The spherical portion holding mechanism 60 includes a spherical portion 61, a slider 62, a balancer 63, and a disc spring 64. The balancer 63 has a function of pressing the second piston 90 against the heat sensitive body 55 via the first piston 70.
The lower peripheral portion of the spherical portion 61 is locked to the locking step portion 22 of the frame 20. In this state, the slider 62 presses the spherical portion 61 from above, and force is applied to the spherical portion 61 from the slider 62, so that a force acts on the spherical portion 61 in the inward direction. The balancer 63 is provided on the inner side of the spherical portion 61 and regulates the movement of the spherical portion 61 trying to enter the inner side.

The slider 62 and the balancer 63 are formed in a disk shape, for example, and a through hole is formed in the center. A set screw 80 is inserted into the through hole 62 </ b> A of the slider 62 and the through hole 63 </ b> C of the balancer 63.
The slider 62 abuts on the upper surface thereof a ridge 83 described later provided on the set screw 80. On the other hand, the diameter of the through hole 63C of the balancer 63 is larger than the outer diameter of the body 81 of the set screw 80, and the balancer 63 and the set screw 80 are not coupled. That is, the balancer 63 is movable up and down with respect to the set screw 80.

On the lower surface side of the balancer 63, a recess 63A to which the first piston 70 is attached is formed around the opening of the through hole 63C. A base 71 and an extension 72 of the first piston 70 described later are installed in the recess 63A.
The balancer 63 is formed with a step portion 63 </ b> B that restricts the movement of the spherical portion 61. The step part 63 </ b> B is formed on the upper part of the disk part of the balancer 63. And the step part 63B has a taper (inclined surface) so that the diameter of the contact surface with the spherical part 61 increases from the upper side to the lower side. As described above, since the stepped portion 63B has an inclined surface, a force is applied to the balancer 63 so as to be pushed downward by the spherical portion 61 and move downward. For this reason, a force that moves downward also acts on the first piston 70 that contacts the lower surface of the balancer 63 and the second piston 90 that is pushed to the lower end side of the first piston 70.
The step portion 63B further has a step portion 63D on the lower side, and the step portion 63D is configured to abut against the locking step portion 22 at the lower inner periphery of the frame 20, and below the balancer 63. When an external force is applied from the side, this part absorbs the impact.

  As described above, since the force is applied to the spherical portion 61 so as to move inward when the sprinkler head 1 is monitored, the balancer 63, the first piston 70 and the second piston 90 are moved downward, A force acts to move the slider 62 upward.

As shown in FIG. 2, for example, when the heat sensitive body 55 made of solder or the like is melted, the balancer 63, the first piston 70, and the second piston 90 move downward. Thereby, the heat sensitive body 55 flows out from the clearance S formed between the inner surface of the cylinder 53A and the outer surface of the second piston 90.
Further, when the balancer 63, the first piston 70, and the second piston 90 move downward, the spherical portion 61 enters inside. As a result, the spherical portion 61 is released from the locked state with the locking step portion 22 of the frame 20, so that the spherical portion holding mechanism 60 falls together with the heat-sensitive portion 51. If the spherical part holding mechanism 60 falls, the valve body 30, the stopper ring 43, etc. which comprise the water sprinkling part 40 will fall in connection with it, and water discharge will be performed.

  The set screw 80 includes a body 81 inserted into the slider 62 and the balancer 63, a head 82 formed on the upper side of the body 81, and inserted into the disc spring 64 and the recess 32 of the valve body 30, and the body 81. And a plurality of leg portions 84 formed on the lower side. The lower portion of the leg portion 84 is connected to the upper portion 53A1 of the cylinder 53A of the heat sensitive portion 51. Further, at the boundary between the body portion 81 and the head portion 82, a ridge portion 83 (details will be described later) that is engaged with the upper surface of the slider 62 is provided. That is, the set screw 80 is locked to the slider 62 and is coupled to the cylinder 53A.

  The disc spring 64 is provided between the valve body 30 and the slider 62 by inserting the head 82 of the set screw 80 into the through hole 64A. That is, the through hole 64 </ b> A of the disc spring 64 is formed to be approximately the same as or slightly larger than the outer diameter of the head 82 of the set screw 80. Further, the height of the head 82 of the set screw 80 is formed to be larger than the height of the disc spring 64. For this reason, the set screw 80 serves to guide the disc spring 64. If the height of the head 82 of the set screw 80 is low, it will not function if the disc spring 64 is crushed more than necessary at the time of assembly. Therefore, the height of the head 82 of the set screw 80 is not so high. By setting this, it becomes possible to hold the disc spring 64 in a stable state.

  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 spherical portion 61, and the spherical portion 61 will move inward (center side). However, the movement of the spherical portion 61 is blocked by the balancer 63, and the spherical portion holding mechanism 60 holds the spherical portion 61. In this state, the disc spring 64 presses the valve body 30 upward, and the valve body 30 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. Further, in the water sprinkling unit 40, the deflector 41 is fixed to the valve body 30, and the guide rod 42 is fixed to the deflector 41. When the valve body 30 seals the water outlet 12, the guide rod 42 is the head. The main body 10 is housed in the space 18.

[Detailed description of first piston 70, set screw 80, etc.]
FIG. 3 is an explanatory diagram of the first piston 70 of the sprinkler head 1 according to the present embodiment. FIG. 4 is an explanatory diagram of the set screw 80 of the sprinkler head 1 according to the present embodiment. FIG. 5 is an exploded cross-sectional view of the first piston 70 and the balancer 63 of the sprinkler head 1 according to the present embodiment as viewed from the lower surface side of the balancer 63. 3A and 4A are longitudinal sectional views of the first piston 70 and the set screw 80, and FIGS. 3B and 4B show the first piston 70 and the set screw. FIG. 3 (c) and FIG. 4 (c) are views of the first piston 70 and the set screw 80 as viewed from below. The first piston 70 and the set screw 80 will be described in detail with reference to FIGS.

(First piston 70)
The first piston 70 has a base 71 that faces the lower surface of the body 81 of the set screw 80, a plurality of extending portions 72 that extend radially from the base 71, and a protrusion 73 that protrudes downward from the base 71. It is what you are doing. The base portion 71 is formed, for example, in a disc shape, and three extending portions 72 are formed on the peripheral edge portion thereof. A protrusion 73 is formed at the center of the lower surface of the base 71.

The extension part 72 has one end connected to the base 71 and the upper surface in contact with the lower surface of the recess 63 </ b> A of the balancer 63. The three extending portions 72 are connected to the base portion 71 so as to form 120 degrees in the circumferential direction of the base portion 71. The protrusion 73 is formed so as to protrude downward in the vertical direction, for example, and the tip 73A of the protrusion 73 is in contact with the second piston 90. Further, the distal end portion 73A is formed so as to be reduced in diameter toward the distal end side.
The recess 63A is formed so that the length from the central axis to the outer periphery of the recess 63A is substantially the same as or slightly longer than the length from the central axis of the first piston to the extension 72. The first piston 70 is prevented from being displaced in the horizontal direction with respect to the lower surface of the balancer 63.

(Set screw 80)
The set screw 80 includes a body portion 81 formed at an intermediate portion, a head portion 82 formed above the body portion 81, a plurality of legs 84 formed below the body portion 81, and a body portion. It has the protruding item | line part 83 formed in the ring shape in the outer peripheral surface of 81. As shown in FIG. The leg portion 84 is connected to the outer peripheral edge on the lower end side of the trunk portion 81. Three legs 84 are formed on the set screw 80. The three leg portions 84 are formed at 120 degrees in the circumferential direction of the outer peripheral edge on the lower end side of the body portion 81. In addition, a slit 84 </ b> A extending in the vertical direction is formed between adjacent leg portions 84. That is, the set screw 80 is formed with three slits 84A. The slit 84A and the extending portion 72 are both formed at the same interval, and the extending portion 72 is inserted into the slit 84A. The lower end side of the leg portion 84 is connected to the upper portion of the cylinder 53A of the heat sensitive portion 51.

  As shown in FIG. 5, the extension portion 72 and the set screw 80 intersect with each other in a state where the first piston 70 is attached to the balancer 63. That is, the extension part 72 is provided so as to straddle the lower surface of the balancer 63 (recess 63A) and the lower surface of the set screw 80 (body part 81).

  The extension part 72 of the first piston 70 is provided so as to contact the lower surface side of the balancer 63. Further, the lower end side of the set screw 80 is connected to the cylinder 53A. For this reason, the heat sensitive body 55 is melted, the spherical portion 61 moves inward, the balancer 63 moves downward, and the first piston 70 and the second piston 90 also move downward. At this time, since the moving amount of the set screw 80 is reduced by the action of the slider 62, the moving amount of the cylinder 53A connected to the set screw 80 is also reduced. For this reason, the second piston 90 moves downward relative to the cylinder 53A, and the heat sensitive body 55 provided between the two pistons is immediately pushed out from the gap S.

  In addition, the 1st piston 70 and the 2nd piston 90 are good to comprise by stainless steel etc. with small heat conductivity compared with copper etc., for example. Thereby, it can suppress that the heat | fever of the thermal plate 53 and the cylinder 53A escapes to the 1st piston 70 and the 2nd piston 90 side, the thermal body 55 can be fuse | melted with high efficiency, and operation | movement is possible. The quickness can be improved.

[Description of Operation of Sprinkler Head 1]
FIG. 6 is an operation explanatory view of the sprinkler head 1 according to the present embodiment. FIG. 6A and FIG. 6B are diagrams showing an operation process of the sprinkler head 1.
In the monitoring state of the sprinkler head 1, pressurized fire extinguishing water is supplied to the water outlet 12 of the head main body 10, and the pressure of the fire extinguishing water is applied to the valve body 30 (see FIG. 1). When a fire occurs and the hot airflow hits the heat sensitive plate 53, the heat is heated, and the heat of the heat sensitive plate 53 propagates to the heat sensitive body 55. When the heat sensitive body 55 is heated from the surroundings and starts to melt, the melted heat sensitive body 55 flows out from the gap S (see FIG. 2) formed between the cylinder 53A and the second piston 90.
At this time, the spherical portion 61 pushed from above by the balancer 63 moves inward, but even when the spherical portion 61 moves, the valve body 30 is pressed against the valve seat 17 and closes the water outlet 12. To maintain. This is because the disc spring 64 has a predetermined stroke enough to maintain the seal of the water outlet 12 by the valve body 30. In this way, the valve body 30 is prevented from moving away from the valve seat 17 until the spherical portion holding mechanism 60 is completely dropped, so that it can operate reliably.

  When the heat sensitive body 55 melts and flows out of the gap S, the balancer 63, the first piston 70, and the second piston 90 are lowered in accordance with the amount of flow of the heat sensitive body 55. When the balancer 63, the first piston 70, and the second piston 90 are lowered, the gap between the balancer 63 and the slider 62 is widened, and the spherical portion 61 biased inward exceeds the step portion 63B of the balancer 63 to the inside. The engagement between the locking step portion 22 and the spherical portion 61 of the frame 20 is released. Thereby, the valve body 30 and the valve body support mechanism 50 are lowered.

  When the valve body support mechanism 50 including the disc spring 64 disposed under the valve body 30 is dropped, the valve body 30 is lowered. As the valve body 30 is lowered, the deflector 41 attached to the valve body 30, the guide rod 42 attached to the deflector 41, and the stopper ring 43 are lowered. When the guide rod 42 is lowered, the step portion 42a at the top thereof is locked to the stopper ring 43, the stopper ring 43 is locked to the locking step portion 22 of the frame 20, and the valve body 30 and the deflector 41 are connected to the guide rod 42. As a result, it is suspended from the frame 20 (see FIG. 6B).

  In the present embodiment, during the water discharge operation, the deflector 41 descends together with the guide rod 42 while being guided by the guide member 43a, so that the deflector 41 is smoothly lowered. Further, by providing the stopper ring 43 approximately in the middle of the frame 20 in the height direction, the amount of lowering of the stopper ring 43 itself can be reduced, so that the operation during water discharge becomes smooth. Thus, when the valve body 30 descends, the water outlet 12 is opened, and the fire extinguishing water pressurized is sprayed from the deflector 41 to extinguish the fire.

[Effects of the sprinkler head 1 according to the present embodiment]
The sprinkler head 1 according to the present embodiment includes a valve body support mechanism 50 that is locked to the frame 20 and has a structure that suppresses the loss of rigidity.
Specifically, the sprinkler head 1 according to the present embodiment has a locking step 22 at the lower end of the inner periphery, a frame 20 connected to the main body, a slider 62 that supports the valve body 30, and a locking Provided on the stepped portion 22 and locked to the locking stepped portion 22, and a spherical portion 61 for locking the slider 62, and provided on the lower side of the slider 62 so as to restrict the movement of the spherical portion 61. This is a so-called all-round support type sprinkler head having a balancer 63 provided inside the spherical portion 61. Since the sprinkler head 1 according to the present embodiment does not have a structure in which the spherical portion 61 is locked at the water outlet 12 like the sprinkler head described in Patent Document 2, it is suppressed that the rigidity is impaired. .

Further, the sprinkler head 1 according to the present embodiment includes a piston (first piston 70 and second piston 90) provided so as to abut on the lower surface side of the valve body support mechanism 50, and a columnar heat sensitive member pressed against the piston. A cylinder 53A in which the body 55 is accommodated and the lower end side of the valve body support mechanism 50 is connected, so that the heat sensitive body 55 is easily warmed up and the speed of operation can be secured.
Specifically, the sprinkler head 1 according to the present embodiment is provided so that the slider 62 is locked and the set screw 80 into which the balancer 63 is movably inserted and the lower surface side of the balancer 63. The piston (the first piston 70 and the second piston 90) and the cylinder 53A in which the columnar heat sensitive body 55 pressed against the piston is housed and the lower end side of the set screw 80 is connected are included. That is, the heat sensitive body 55 has a columnar shape corresponding to the cylinder 53A. Since the amount of creep can be reduced by using the columnar heat-sensitive body 55, the heat-sensitive body 55 can be made smaller and the heat capacity of the heat-sensitive body 55 is reduced. Can be secured.

  Therefore, the sprinkler head 1 according to the present embodiment can ensure the high speed of operation while suppressing the loss of rigidity.

  In the present embodiment, the base 71 has been described as having a disk shape, but is not limited thereto, and may be, for example, a polygon.

  In the present embodiment, the case where there are three extending portions 72 and leg portions 84 (slits 84A) has been described as an example. However, the present invention is not limited to this, and two or four or more. May be. In the case of two, the extension part 72 and the leg part 84 are good to be provided so that 180 degree | times may be made in the circumferential direction, for example. In addition, although the extension part 72 and the leg part 84 (slit 84A) may be one, the several one tends to maintain the attitude | position of the 1st piston 70, and can press the thermal body 55 more reliably. .

  In the present embodiment, the case where all three of the extending portions 72 have the same shape has been described as an example, but the present invention is not limited to this, and each shape may be different.

  In the present embodiment, the case where the recess 63A is formed in the balancer 63 has been described as an example, but the present invention is not limited to this. For example, the recess 63A may not be formed in the balancer 63, and the lower surface of the balancer 63 may be a flat surface.

  In the present embodiment, the cylinder 53A has a cylindrical shape and the heat sensitive body 55 has a columnar shape, but is not limited thereto. That is, the shape of the heat sensitive body 55 may be a columnar shape. For example, the shape of the cylinder 53A may be a polygon or the like, and the shape of the heat sensitive body 55 may be a polygonal column.

  In the present embodiment, the case where the spherical portion 61 is a sphere has been described as an example. However, the shape of the spherical portion 61 is not limited thereto, and the contact surface with the frame 20, the slider 62, and the balancer 63 is a curved surface. The spherical portion 61 may include a ring shape having a circular cross section such as a C ring.

  In the present embodiment, the heat sensitive plate 53 and the cylinder 53A are described as being integrally formed. However, the heat sensitive plate 53 and the cylinder 53A are not limited thereto, and may be separate bodies.

[Modification]
FIG. 7 is an explanatory diagram of a modification of the sprinkler head 1 according to the present embodiment. Fig.7 (a) is the figure which looked at the 1st piston 170 from the side surface side, FIG.7 (b) is the figure which looked at the 1st piston 170 from the lower side.
In the present embodiment, the slit 84A is formed on the set screw 80 side and the first piston 70 is inserted into the slit 84A. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 7, the relationship between the set screw 80 and the first piston 70 may be reversed. That is, you may form the slit 174 (opening part) in which the leg part 84 (refer FIG. 4) of the set screw 80 is inserted in the 1st piston 170. FIG. The first piston 170 may be set so that the diameter of the slit 174 is larger than the leg 84 of the set screw 80 so that the first piston 170 can move up and down with respect to the set screw 80. In this modification, the base portion 172 of the first piston 170 is not formed with the extension portion 72, and instead, the outer diameter of the base portion 172 is expanded to the same extent as the other end side of the extension portion 72. It has a shape. Also in this mode, when the first piston 70 is pushed by the balancer 63, the lower second piston 90 can be pushed, and the heat sensitive body 55 can be pushed.

  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, 17 Valve seat, 18 Space, 20 Frame, 21 Screw part, 22 Locking step part , 30 Valve body, 30A Leg part, 30B Groove part, 31 Flange part, 32 Recessed part, 40 Water spray part, 41 Deflector, 41a Insertion hole, 42 Guide rod, 42a Step part, 43 Stopper ring, 43a Guide member, 44 Coil spring, 50 Valve body support mechanism, 51 heat sensitive part, 53 heat sensitive plate, 53A cylinder, 53A1 upper part, 55 heat sensitive body, 60 spherical part holding mechanism, 61 spherical part, 62 slider, 62A through hole, 63 balancer, 63A concave part, 63B step part, 63C through hole, 63D step, 64 disc spring, 64A through hole, 70 1st pin Ston, 71 Base, 72 Extension, 73 Projection, 73A Tip, 80 Set Screw, 81 Body, 82 Head, 83 Projection, 84 Leg, 84A Slit, 90 2nd Piston, 170 1st Piston, 172 base, 174 slit, S gap.

Claims (5)

A main body having a water outlet;
A frame connected to the body;
A valve body disposed at the water outlet in the frame;
A valve body support mechanism provided on the frame, having a balancer and a set screw, and supporting the valve body;
A piston provided to contact the lower surface side of the balancer;
A cylinder in which a columnar heat sensitive body pressed against the piston is accommodated, and a lower side of the set screw is connected;
A sprinkler head characterized by comprising: The frame is
Has a locking step at the lower end of the inner periphery,
The valve body support mechanism is
A slider provided below the valve body and supporting the valve body;
A spherical portion provided on the locking step and locking the slider;
The balancer is
Provided on the lower side of the slider, provided on the inner side of the spherical part so as to restrict the movement of the spherical part,
The set screw is
Sprinkler head of claim 1, as well as contact with the slider, characterized in that movably inserted into the balancer. The set screw is
A slit extending downward from the lower surface side of the balancer is formed,
The piston is
Abut said balancer, a extending portion which is inserted into the slit, a base end side of the extending portion are connected, a first piston and a projection extending downwardly from said base portion,
The sprinkler head according to claim 1, further comprising: a second piston housed in the cylinder, wherein the upper surface side is pressed against the first piston, and the lower surface side presses the heat sensitive body. A main body having a water outlet;
A frame connected to the body;
A valve element disposed at the water outlet in the frame;
A valve body support mechanism provided on the frame, having a balancer and a set screw, and supporting the valve body;
A piston pushed downward by the balancer;
A cylinder containing a columnar heat sensitive body pressed against the piston;
With
Sprinkler head characterized by that. The lower side of the set screw is inserted into the base of the piston
The sprinkler head according to claim 4.

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