JP5836640B2 - Sprinkler head wrench - Google Patents

Description

The present invention relates to a wrench tool used when a sprinkler head for fire extinguishing is attached to or detached from a pipe.

The sprinkler head is installed on a ceiling surface or a wall surface in a building, has a nozzle that can be connected to a pipe connected to a water supply source at one end, and a heat-sensitive operation unit at the other end. During normal times, the heat-sensitive operating part supports a valve body that closes the nozzle.

As an example of the sprinkler head, there is a conshielded sprinkler head that is installed in a state of being embedded in a ceiling surface or a wall surface, and the sprinkler head is covered with a cover plate. The conshielded sprinkler head is used as a sprinkler head having excellent design properties. For example, there is one described in Patent Document 1. The conshielded sprinkler head disclosed in Patent Document 1 is provided with a cylindrical member outside a so-called flash-type sprinkler head in which a deflector housed therein is projected during operation, and an engaging portion with a cover plate at the lower portion of the cylindrical member. Is provided.

The sprinkler head shown in FIG. 15 is a conshielded sprinkler head disclosed in Patent Document 1, and a cylindrical member A having a bottomed cylindrical shape is provided outside a flash-type sprinkler head SH (hereinafter “sprinkler head SH”). A cylindrical retainer B indicated by a two-dot chain line is connected to the lower portion of the cylindrical member A, and a cover plate P that covers the sprinkler head SH is joined to the lower end of the retainer B by a low melting point alloy. Yes.

FIG. 15A shows a state before the retainer B is connected to the cylindrical member A, and a protective cap C is attached to the sprinkler head SH. (B) is a bottom view of (a), and a plurality of wrench engaging portions K formed at equal intervals on the outer peripheral portion of the main body flange portion F of the sprinkler head SH are located outside the outer periphery of the protective cap C. The wrench can be locked to the wrench engaging portion K in a state where the protective cap C is attached to the sprinkler head SH.

International Publication No. 2010/002722

The sprinkler head of Patent Document 1 has a structure in which the wrench can be engaged with the sprinkler head while the protective cap C is attached to the sprinkler head, but the engaging portion K between the wrench and the sprinkler head is near the bottom surface of the cylindrical member A. Therefore, it was difficult to visually check the engaged state. In particular, when removing the sprinkler head connected to the pipe, since the wrench engaging portion K of the sprinkler head is disposed at the back of the ceiling, visual confirmation is difficult.

Therefore, in order to confirm the engaged state of the wrench and the sprinkler head, the operator has been required to check the engaged state by inserting the wrench into the cylindrical member A and then rotating the wrench.

In view of the above problems, an object of the present invention is to provide a sprinkler head attaching / detaching wrench in which the engagement state between the sprinkler head and the wrench can be easily confirmed visually.

In order to achieve the above object, the present invention provides the following sprinkler head attaching / detaching wrench.
In the present invention, a main body having a nozzle inside and screw-connected to a water supply pipe is installed in the ceiling, and a bottom surface side of a bottomed cylindrical cup material covering an outer peripheral portion of the main body is engaged with the outside of the main body. The sprinkler head attaching / detaching wrench used for the sprinkler head is provided with a wrench engaging portion for connecting the main body to the water supply pipe near the bottom surface of the cup material. The engagement confirmation part which can confirm the engagement state of a nail | claw and a sprinkler head is installed in the outer peripheral part.
According to this, when the tip of the wrench for attaching / detaching the sprinkler head correctly engages with the wrench engaging portion of the main body, the position of the main body depends on the positional relationship between the engagement confirmation portion provided on the outer peripheral portion and the open end of the cup material. Since it can be determined whether or not the sprinkler head attaching / detaching wrench is engaged, the engaged state can be easily confirmed visually.

In the present invention, the engagement confirmation portion is formed to protrude outward from the sprinkler head attaching / detaching wrench, and has a predetermined height extending in a direction parallel to the central axis of the sprinkler head attaching / detaching wrench. It can be configured as a part.
According to this, since the engagement confirmation portion is configured as a step portion, the engagement portion of the main body and the sprinkler head can be attached / detached in a state where the opening end of the cup material is placed on the step end surface of the engagement confirmation portion. When the wrench is engaged and the open end of the cup material is not placed on the stepped end surface of the engagement confirmation portion, it can be determined that the engaged state is incomplete.

In addition, the height of the step can be used as the head mounting range on the bottom surface of the ceiling, and can be used as a guide for adjusting the height of the sprinkler head when it is mounted on the water supply pipe. Improves.

About the said invention, the engaging part with the protective cap which covers the thermal decomposition part installed in the nozzle exit side of a main body can be provided.
According to this, the protective cap and the sprinkler head attaching / detaching wrench can be engaged, the sprinkler head attaching / detaching wrench can be prevented from tilting or spinning, and the sprinkler head attaching / detaching wrench can be stabilized. Can be fixed. Therefore, workability when attaching / detaching the sprinkler head to / from the water supply pipe is improved.

The engaging portion with the protective cap can be provided on the peripheral surface or the bottom surface of the sprinkler head attaching / detaching wrench, and the engaging state can be installed at a position where it can be seen from the outside of the sprinkler attaching / detaching wrench. Specifically, it can be configured by providing an engaging portion with a protective cap on the outer peripheral surface of the sprinkler head attaching / detaching wrench. Alternatively, the sprinkler head attaching / detaching wrench may be configured to penetrate through the bottom surface and provide an engaging portion with the protective cap.

In the present invention, the engagement confirmation portion and the claw can be arranged on the same line parallel to the cylindrical axis of the sprinkler head attaching / detaching wrench.
According to this, the position of the claw can be visually recognized by the position of the engagement confirmation portion in a state where the operator inserts the claw portion of the sprinkler head attaching / detaching wrench into the cup material.

ADVANTAGE OF THE INVENTION According to this invention, the engagement state of the sprinkler head main body and the sprinkler head attaching / detaching wrench can be easily confirmed visually, and workability at the time of attaching / detaching the sprinkler head to / from the water supply pipe can be improved.

(A): Side view of the wrench for attaching / detaching the sprinkler head of the present invention, (b): ZZ sectional view of (a) Cross section of sprinkler head Front view of the main body of the sprinkler head of FIG. Side view of FIG. Cross section of thermal decomposition part Disassembled perspective view of thermal decomposition unit Exploded sectional view of cylinder plunger Sectional view of the sprinkler head of Fig. 2 during construction XX sectional view of FIG. (A): Cross-sectional view of the sprinkler head with a protective cap attached, (b): Bottom view of (a) Side view of protective cap and wrench for attaching / detaching sprinkler head of FIG. Sectional view when connecting the sprinkler head to the water supply pipe Sectional view when removing the sprinkler head connected to the water supply pipe Side view of the sprinkler head connected to the water supply pipe engaged with a sprinkler head attaching / detaching wrench Cross section of conventional sprinkler head

  The sprinkler head attaching / detaching wrench of the present invention (hereinafter abbreviated as “wrench”) has a structure that engages with the bottom surface of the cup material of the sprinkler head. The structure of the wrench will be described below.

The wrench R shown in FIG. 1 has a cylindrical shape, and a plurality of claws R1 that can be engaged with the support cup bottom surface of the sprinkler head S1 are formed at one end at equal intervals. A step portion R2 is formed as an engagement confirmation portion on the lower side of the outer peripheral surface of each claw R1 so as to protrude outward. The claw R1 and the step portion R2 are arranged on a ZZ straight line, and the ZZ straight line has a positional relationship parallel to the cylinder axis Y of the wrench R.

With the above configuration, when the wrench R is used for the sprinkler head (see FIG. 15) of Patent Document 1 described above, the claw R1 is inserted into the cylindrical member A and the claw R1 cannot be visually observed. The operator can grasp the position of the claw R1 based on the position.

Instead of the stepped portion R2, a line extending from the claw R1 to the other end side in parallel with the cylinder axis Y can be provided on the outer peripheral surface of the wrench R by unevenness. Or it is also possible to provide the above-mentioned line by printing or painting instead of unevenness.

The step portion R2 has a predetermined height R3 in a direction parallel to the cylinder axis Y of the wrench R. This indicates that the height R3 of the stepped portion indicates the attachment range of the sprinkler head S1 with respect to the lower surface of the ceiling W. Since the sprinkler head S1 is a guide for height adjustment when the main body of the sprinkler head S1 is attached to the water supply pipe, the sprinkler head S1. The height adjustment accuracy and workability can be improved.

Furthermore, a display indicating the attachment range can be performed between each step portion R2 by engraving, painting, printing, or the like. In FIG. 1A, the attachment range is shown on the outer peripheral surface of the wrench R by the protrusion T.

Further, a notch is formed between each claw R1, and this notch serves as an engagement portion R4 with a protective cap 30 described later. The shape of the notch is substantially the same as the shape of the protruding portion 31 formed on the side surface of the protective cap 30, and the protruding portion 31 can be engaged with the protective cap engaging portion R4, and the sprinkler head S1 with the protective cap 30 attached thereto. Can be stably fixed in the wrench R.

An end of the wrench R opposite to the side where the claw R1 is formed is a bottom surface, and a square hole R5 to which a wrench handle can be connected is formed on the bottom surface.

Next, the structure of the sprinkler head S1 that can be engaged with the wrench R will be described.

The sprinkler head S1 includes a main body 1, a valve body 3, a thermal decomposition unit 4, a deflector 5, a support cup 6 (cup material), and a cover plate 7, and is configured as a conshielded sprinkler head.

The main body 1 shown in FIGS. 2 to 4 is hollow, and one end is a pipe connecting portion 1A in which a male screw that can be connected to a filled pipe is formed. The other end of the pipe connection 1A is a water outlet 1B. The end of the water outlet 1 </ b> B is closed by the valve body 3.

Between the pipe connecting part 1A and the water outlet 1B, a support cup locking part 1C having a polygonal cross-sectional shape at the outer peripheral part is formed. A flange having a larger outer periphery than the outer periphery of the support cup locking portion 1C is formed on the side of the water outlet 1B from the support cup locking portion 1C, and a cylindrical shape is formed from the edge of the hook portion toward the water discharge side. A frame portion 2 is formed. The main body 1 is composed of the above-described pipe connecting part 1A and a frame part 2 having a larger outer peripheral surface than the pipe connecting part 1A.

The outer peripheral cross-sectional shape of the frame portion 2 is a shape in which two portions of a circle are notched in parallel. Specifically, two notched straight portions and an arc portion between each straight portion are formed. ing. Accordingly, a curved surface portion 2A having a circular arc cross section and a flat surface portion 2B having a straight cross section are formed on the outer peripheral surface of the frame portion 2. The flat surface portion 2B is formed as a notch surface portion formed so as to cut out the outer peripheral surface of the frame portion 2 from the pipe connection portion 1A side to a beam-like portion 2J described later, and an opening 2E is formed there. The outer peripheral cross-sectional shape of the lower part of the frame part 2 is a circle having the same radius as the curved surface part 2A without the flat part 2B. That is, a beam-like portion 2J made of an arc-shaped portion erected along the circumferential direction of the frame portion 2 is formed below the plane portion 2B. The beam-like part 2J is formed at an opposing position with the cylinder axis of the frame part 2 as the center.

An inner flange 2 </ b> C that is formed to extend inward is formed on the inner peripheral lower portion (the lower portion of the curved surface portion 2 </ b> A and the inner peripheral surface of the beam-shaped portion 2 </ b> J) of the frame portion 2. Lever insertion grooves 2D and 2D are formed in the inner flange 2C located at the lower portion of the curved surface portion 2A (FIG. 2).

An opening 2E is formed in the flat surface portion 2B of the frame portion 2 rotated approximately 90 ° from the lever insertion groove 2D. The opening 2E is formed by cutting the inside of the frame part 2 with a diameter smaller than the outer diameter of the curved part 2A and larger than the dimension between the two plane parts 2B.

The inner flange 2C of the beam-like portion 2J located below the opening 2E serves as a lever locking portion 2F to which a lever 11 of a thermal decomposition portion 4 described later is locked. By providing the lever locking portion 2F on the beam-like portion 2J below the opening 2E, when a load is applied to the lever locking portion 2F from the water outlet 1B side to the lower end side of the frame portion 2, the beam-like portion 2J is applied. Although the elastic deformation is caused by the applied load, the amount of deformation due to the elastic deformation of the beam-like portion 2J can be increased as compared with the case where the opening 2E is not provided.

On the outer peripheral side of the lever insertion groove 2D, there is formed a deflector locking portion 2G formed to hang downward from the lower end of the frame portion 2. A step portion 2H that can accommodate the valve body 3 is formed at the boundary between the frame portion 2 and the water outlet 1B. The movement when the valve body 3 is displaced from the water discharge port 1B due to vibration, impact, or the like by the step portion 2H is retained in the step portion 2H, and the valve body 3 is displaced from the water discharge port 1B so that the water in the water discharge port 1B is discharged. Prevents leakage.

The valve body 3 has a disk shape and is accommodated in the step 2H described above. The valve body 3 is pressed against the end of the water outlet 1B by a compression screw 21 to be described later and closes the water outlet 1B.

The thermal decomposition portion 4 is locked to an inner flange 2C (lever locking portion 2F) formed on the beam-like portion 2J of the frame portion 2, and in the event of a fire, the thermal decomposition portion 4 is decomposed by the heat of the fire to release the valve body 3. The thermal decomposition unit 4 includes a lever 11, a support plate 12, a balancer 13, a cylinder 14, a plunger 15, a low melting point alloy 16, and a set screw 17.

The thermal decomposition unit 4 is configured as a unit part as shown in FIG. 5, and can be stored and transported as a unit part. Even when the sprinkler head is assembled, it is incorporated into the main body 1 in the state of unit parts shown in FIG.

The lever 11 is used as a pair, and has one end that is locked to the inner flange 2C and bent outward. A protrusion 11A provided symmetrically is formed on the upper portion of the lever 11 (FIG. 6), and a rectangular hole 11B is formed on the lower portion. A support plate 12 and a balancer 13 are locked between the pair of levers 11, the support plate 12 is locked to the protrusion 11A, and the balancer 13 is locked to the lower hole 11B. A hole 13A is formed in the center of the balancer 13, and the cylinder 14 is inserted into the hole 13A.

The cylinder 14 has a cylindrical shape, and a step is formed inside, and a large diameter portion 14A and a small diameter portion 14B are formed. An annular low melting point alloy 16 is accommodated in the large diameter portion 14A. A flange portion 14C is formed at the end on the large diameter portion 14A side, and the flange portion 14C engages with the hole 13A of the balancer 13. The inner diameter of the small diameter portion 14B is substantially equal to the inner diameter of the annular low melting point alloy 16.

The tip of the small diameter portion 14B is bent in a state where the heat collectors 18 and 19 are sandwiched, and the heat collectors 18 and 19 are installed in the cylinder 14. The heat collectors 18 and 19 are made of a metal such as copper or a copper alloy having good thermal conductivity, and have a function of absorbing heat from a fire and transmitting it to the low melting point alloy 16 in the cylinder 14.

A large-diameter portion 15A and a small-diameter portion 15B are formed on the outer peripheral portion of the plunger 15 by steps. The outer diameter of the large diameter portion 15 is slightly smaller than the inner diameter of the large diameter portion 14A of the cylinder 14. The outer diameter of the small diameter portion 15 </ b> B is slightly smaller than the inner diameter of the small diameter portion of the cylinder 14 and the inner diameter of the low melting point alloy 16.

The plunger 15 is inserted from the large diameter portion 14 </ b> A side of the cylinder 14, and the small diameter portion 15 </ b> B and the step portion 15 </ b> C at the boundary between the large diameter portion 15 </ b> A and the small diameter portion 15 </ b> B are in contact with the low melting point alloy 16. In a state where the plunger 15 is inserted into the cylinder 14, the outer peripheral surface of the plunger 15 is slidable with the inner peripheral surface of the cylinder 14 </ b> B and the low melting point alloy 16.

The plunger 15 has a through hole 15D, and a step portion 15E with which the tip of the set screw 17 contacts is formed in the middle of the through hole 15D.

The set screw 17 has a cylindrical shape, and external screws 17A are threaded on the outside. When the male screw 17A is screwed into the female screw 12A of the support plate 12, the tip of the set screw 17 presses the step portion 15E of the plunger 15, so the low melting point alloy 16 becomes the step portion 15E of the plunger 15 and the bottom portion of the cylinder 14. The force in the compression direction is applied by 14D.

A force is also applied to the support plate 12 and the balancer 13 engaged with the pair of levers 11 in such a direction that the engagement with the lever 11 is strengthened, and the engagement state of the lever 11, the support plate 12 and the balancer 13 is maintained. Thereby, the thermal decomposition part 4 is comprised as a unit.

A saddle 20 is installed between the thermal decomposition unit 4 and the valve body 3. The saddle 20 is formed of a metal plate material, and a recess 20A is formed on one surface where the pair of levers 11 are engaged. A female screw 20B is screwed between the recesses 20A and 20A, and a compression screw 21 is screwed into the female screw 20B.

When the compression screw 21 is screwed into the female screw 20B from the thermal decomposition part 4 side toward the valve body 3, the tip of the compression screw 21 presses the valve body 3, and the valve body 3 is pressed against the end of the water outlet 1B. The water outlet 1B is closed, and the inner flange 2C of the frame portion 2 where the pair of levers 11 are locked is pressed downward. As a result, the beam-like portion 2J is elastically deformed to cause a slight displacement. Due to the displacement due to the deflection of the beam-like portion 2J, a spring force is generated that causes the components of the thermal decomposition portion 4 to fly out of the frame portion 2 during the decomposition operation.

The deflector 5 is flat and has a plurality of slits 5A formed around it. The deflector 5 has holes 5B and 5B into which the guide pins 5C are fitted, and one end of the guide pin 5C is inserted into the hole 5B and fixed by caulking. The guide pin 5C is inserted into a hole 5E formed in the deflector locking portion 2G of the main body 1. The guide pin 5C can slide while being inserted into the hole 5E. A flange portion 5D is formed on the other end side of the guide pin 5C and can be locked to the end surface of the hole 5E of the deflector locking portion 2G of the main body 1.

The support cup 6 (cup material) is a bottomed cylindrical member that covers the outside of the frame portion 2 of the main body 1. An opening 6B that can be fitted to the support cup locking portion 1C of the main body 1 is formed in the bottom portion 6A of the support cup 6. The support cup 6 can be prevented from rotating with respect to the main body 1 by fitting the support cup locking portion 1C and the opening 6B.

A cylindrical portion 6C is formed on the periphery of the opening 6B. The position of the end face of the cylindrical part 6C is on the pipe connecting part 1A side from the end face of the support cup locking part 1C, and the end of the cylindrical part 6C is between the pipe connecting part 1A of the main body 1 and the support cup locking part 1C. It is located in the vicinity of the constricted portion 1D. After making cuts at several locations at the base of the cylindrical part 6C, the upper part of the cut is pressed from the outer peripheral side toward the constricted part 1D, and the upper part of the notch is deformed toward the constricted part 1D to form the engaging part 6D. Thus, the engaging portion 6D and the constricted portion 1D are engaged, and the support cup 6 can be fixedly installed on the main body 1.

A base plate 6E having an opening similar to the opening 6B described above is installed inside the bottom surface of the support cup 6. A plurality of openings 6F are formed at equal intervals near the periphery of the bottom surface 6A of the support cup 6. The opening 6F extends from the bottom surface 6A to the side surface 6G of the support cup. A spiral groove 6H is formed on the end face side of the side surface 6G.

When the opening 6B of the support cup 6 and the support cup locking portion 1C of the main body 1 are fitted via the base plate 6E, the deflector locking portion 2G of the main body 1 has two openings 6F, as shown by dotted lines in FIG. It is arranged between 6F. Thereby, when the guide pin 5C inserted through the hole 5E of the deflector locking portion 2G is moved to the bottom surface side of the support cup 6, the flange portion 5D comes into contact with the base plate 6E, so the guide pin 5C is opened from the opening 6F. The upward movement is prevented. Furthermore, it is possible to prevent the deflector 5 installed on the lower end side of the guide pin 5C from interfering with the heat collector 19 of the thermal decomposition unit 4.

The cover plate 7 is composed of a thin plate-like lid 7A that covers the main body 1, the thermal decomposition unit 4 and the deflector 5 in the support cup 6, and a cylindrical retainer 7B. Since the cover plate 7 is connected to the support cup 6 after connecting the pipe connection portion 1A of the main body 1 to the fire extinguishing equipment pipe, the cover plate 7 is assembled as a separate component from the main body 1 and the support cup 6 described above.

The lid 7A has a disk shape and is made of copper or copper alloy which easily propagates heat. The retainer 7B is cylindrical, and the ends of a plurality of legs hanging from the lower end are bent to form a connection surface 7C with the lid 7A. The connecting surface 7C and the lid 7A are joined by a low melting point alloy 7D. As the low melting point alloy 7D, an alloy having a melting point lower than that of the low melting point alloy 16 in the cylinder 14 is used.

A protrusion 7E that can be screwed into the spiral groove 6H of the support cup 6 is formed on the peripheral surface of the retainer 7B. The protrusion 7E is formed so that the peripheral surface of the retainer 7B is cut and the protrusion 7E protrudes obliquely downward.

As shown in FIG. 10, the sprinkler head S1 is provided with a protective cap 30 for protecting the thermal decomposition unit 4 from external impacts.

The protective cap 30 shown in FIGS. 10 and 11 has a low and low cylindrical shape, and a plurality of protruding portions 31 extending in the outer peripheral direction are formed on the side surface. The tip of the protrusion 31 is engaged with the edge of the opening 6F described above, and the installation location and position correspond to the opening 6F. The protruding portion 31 includes two side surface portions 32 and an outer surface portion 33 between the side surface portions 32 and 32.

The front end portion 32A of the side surface portion 32 is formed so as to protrude from the opening portion (upper side in the drawing) of the protective cap 30, and is locked to the edge of the beam portion 6J between the openings 6F of the support cup 6. A step 32B capable of maintaining the engaged state with the beam portion 6J is formed at the distal end portion 32A. Since the protective cap 30 is engaged with the beam portion 6J of the support cup 6, there is a space 35 that can penetrate from the lower end opening of the support cup 6 to the opening 6F drilled in the bottom portion 6A of the upper end. Further, the outer surface portion 33 of the protective cap 30 is installed close to the inner peripheral surface of the support cup 6.

FIG. 10B shows a state in which the sprinkler head of FIG. 10A is viewed from the bottom surface side of the protective cap 30. In FIG. 10B, a space 35 that can penetrate the opening 6 </ b> F of the support cup 6 is formed between the protrusions 31 of the protective cap 30, and the claw R <b> 1 of the wrench R can be inserted into the space 35. It has become. The wrench R inserted through the space 35 can be engaged with the edge of the opening 6F (the edge of the beam portion 6J) via the side surface portion 32 of the protective cap 30. Therefore, the sprinkler head S1 can be attached to the water supply pipe with the wrench R in a state where the protective cap 30 is mounted.

Further, when the claw R1 at the tip of the wrench R is inserted into the space S, the claw R1 is guided to the opening 6F by the side surfaces 32, 32 of the protrusion 31, and the side surfaces 32, 32 serve as a guide, The cap engaging portion R4 of the wrench R is engaged with the side surface portion 32 of the protruding portion 31, and the sprinkler head S1 having the protective cap 30 mounted therein is stably disposed in the wrench R.

Next, a procedure for connecting the sprinkler head to the water supply pipe using the wrench R will be described.

First, the sprinkler head S1 with the protective cap 30 attached is inserted into the wrench R (FIG. 12). When the protective cap 30 is inserted into the wrench R, the protruding portion 31 of the protective cap 30 engages with the protective cap engaging portion R4 of the wrench R, and the claw R1 is inserted into the opening 6F of the support cup 6. The open end of the support cup 6 is placed on the end surface of the step portion R2 of the wrench R.

In this state, the male screw 1A protruding from the opening 6B of the support cup 6 is screwed into a water supply pipe indicated by a two-dot chain line in FIG. Specifically, when the wrench R in FIG. 12 is rotated, the sprinkler head S1 in the wrench R is rotated and the male screw 1A is screwed into the water supply pipe. At that time, adjustment is performed so that the lower surface of the ceiling W is positioned within the range of the height R3 of the step portion R2 on the outer peripheral surface of the wrench R. With this position adjustment, the installation height of the sprinkler head S1 installed indoors can be made uniform within a predetermined range.

Finally, the protective cap 30 is removed from the sprinkler head S1, the cover plate 7 is screwed into the spiral groove 6H of the support cup 6, and the cover 7A of the cover plate 7 is adjusted to a position close to the ceiling W (FIG. 1). This completes the installation of the sprinkler head.

Next, a procedure for removing the sprinkler head installed in the water supply pipe behind the ceiling with the wrench R will be described.

Before removing the sprinkler head S1, the water in the water supply pipe is drained. Next, the cover plate 7 is rotated to remove the retainer 7 </ b> B from the support cup 6, and the wrench R is inserted into the support cup 6. At that time, when the wrench R is inserted into the support cup 6 along the cap engaging portion R4 along the position of the guide pin 5C extending downward as shown in FIG. The claw R1 is inserted (FIG. 14).

After confirming that the open end of the support cup 6 is placed on the end surface of the step portion R2 of the wrench R, the wrench R is rotated in the direction in which the male screw 1A is loosened. As the wrench R rotates, the sprinkler head S1 also rotates, and the male screw 1A comes off the water supply pipe. This completes the removal of the sprinkler head.

R Sprinkler head wrench
R1 nails
R2 step
R3 Step height
Engagement part with R4 protective cap
R5 square hole
S1 Sprinkler head
1 Body
3 Disc
4 Thermal decomposition part
5 Deflector
6 Support cup (cup material)
6F opening
7 Cover plate
30 Protective cap
31 Projection
35 space

Claims (5)

It has a main body that has a nozzle inside and is screw-connected to the water supply pipe in the ceiling, and a cup material that has a bottomed cylindrical shape that covers the outer periphery of the main body and whose bottom side is engaged with the outside of the main body. In the vicinity of the bottom surface of the cup material, a sprinkler head attaching / detaching wrench used for a sprinkler head having a wrench engaging portion for connecting the main body to the water supply pipe,
It is formed in a cylindrical shape,
The cylindrical tip has a claw that is inserted into the cup material and engages the wrench engaging portion,
A sprinkler head attachment / detachment characterized in that the cylindrical outer peripheral portion has a step portion that comes into contact with the open end of the cup material while the claw is inserted into the cup material and engaged with the wrench engaging portion. Wrench for.
It has a main body that has a nozzle inside and is screw-connected to the water supply pipe in the ceiling, and a cup material that has a bottomed cylindrical shape that covers the outer periphery of the main body and whose bottom side is engaged with the outside of the main body. In the vicinity of the bottom surface of the cup material, a sprinkler head attaching / detaching wrench used for a sprinkler head having a wrench engaging portion for connecting the main body to the water supply pipe,
It is formed in a cylindrical shape,
The cylindrical tip has a claw that is inserted into the cup material and engages the wrench engaging portion,
On the cylindrical outer peripheral portion, the nail is inserted into the cup material, and the nail and the sprinkler head are engaged with the wrench engaging portion. Or a sprinkler head detachable wrench characterized by having a line by painting.
2. The sprinkler head attaching / detaching wrench according to claim 1, wherein the stepped portion is formed to project outward from the sprinkler head attaching / detaching wrench.
4. The sprinkler head attaching / detaching wrench according to claim 1 or 3, wherein the step portion has a predetermined height extending in a direction parallel to the central axis of the sprinkler head attaching / detaching wrench.
The sprinkler head attaching / detaching wrench according to any one of claims 1 to 4, wherein the stepped portion and the claw are disposed on the same line parallel to the cylinder axis of the sprinkler head attaching / detaching wrench.

Images