JP2015039586A - Head fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working efficiency in a manufacturing inspection and at the site by fitting and fixing a sprinkler head to a pipe side by a simple operation including one-touch operation.SOLUTION: A pipe coupling part 14 having an outer screw 16, of a sprinkler head 10 can be fitted to a joint unit 12 fixed to an unwinding pipe 20 side by an operation including the one-touch operation. The joint unit 12 includes: a socket 26 that is disposed at a lower side of a joint 22 of the unwinding pipe 20; and a sleeve 28 that is slidably disposed outside the socket 26 and is movable between a lock position preventing a lock ball 30 from moving outside, and an unlocking position allowing the lock ball 30 to move outside. When a tip end 14a of the pipe coupling part 14 of the sprinkler head 10 is inserted into a prescribed position coming into pressure contact with a packing 24 provided in the joint unit 12, the lock ball 30 is fitted in a ball fitting groove 18 of the pipe coupling part 14 to fit and fix the sprinkler head 10 to the joint unit 12.

Description

The present invention relates to a head mounting structure in which a head such as a sprinkler head is mounted on a pipe side via a joint unit.

  Conventionally, as shown in FIG. 10, the sprinkler head mounting structure is such that the tip of the pipe 104 lowered from the ceiling is positioned toward the mounting hole 110 provided in the ceiling surface 108, and the screw at the tip of the pipe 104. The screw portion 102 of the head main body provided at the upper part of the sprinkler head 100 is screwed into the hole 106 and fixed, and the gap with the mounting hole 110 is closed with a sealing plate 112 (Patent Document 1).

  Here, the screw hole 106 at the tip of the pipe 104 is a taper female screw, the screw portion 102 of the sprinkler head 100 is a taper male screw, and the screw portion 102 of the sprinkler head 100 is a Teflon (registered trademark) seal tape. We prevent leakage by winding and screwing.

  In some sites, liquid sealants and seal tapes are used in combination in order to prevent leakage more reliably.

Moreover, in the manufacturing inspection of the sprinkler head, the pressure resistance inspection and the water discharge amount inspection are performed by attaching and fixing the sprinkler head to the piping of the testing machine. Also in the case of this manufacturing inspection, leakage prevention is performed by winding a Teflon (registered trademark) seal tape around the thread portion of the sprinkler head.

JP 2012-061026 A

  However, in manufacturing inspection, it is necessary to wrap seal tape around the sprinkler head and fix it to the testing machine, and when the test is finished and the sprinkler head is removed from the testing machine, it is wound around the threaded portion. It requires the work of removing the seal tape to clean it, and the seal tape is generated as waste material and needs to be disposed of, which requires time and effort for testing the sprinkler head, which also affects production costs.

  Also, in the field work, it is necessary to wrap a seal tape around the thread portion of the sprinkler head or to use a liquid sealant in combination, which takes time and effort and hinders work efficiency.

It is an object of the present invention to provide a head mounting structure that can improve the manufacturing inspection and the work efficiency in the field by mounting and fixing the head to the piping side by a simple operation including a one-touch operation.

(Head mounting structure)
The present invention provides a head mounting structure in which a head having an external thread formed on an upper pipe connecting portion is mounted and fixed to a pipe side via a joint unit.
The fitting unit is
A joint member that is fixed to the pipe or formed with a threaded portion that connects to the pipe, has a flow path formed therein, and is opened up and down;
A socket member disposed on the lower side of the joint member, and having a connection storage portion for storing the pipe connection portion of the head therein;
A lock ball that is housed in a through hole formed in the peripheral wall of the socket member so as to freely enter and exit;
A sleeve member that is slidably disposed outside the socket member and is movable between a lock position that prevents the lock ball from moving outward and a lock release position that allows the lock ball to move outward;
A spring for urging the sleeve member in the direction of the lock position;
A stopper member for locking the sleeve member biased by the spring at the lock position;
With
The head forms a ball fitting groove that fits and locks the lock ball in the empty portion of the external screw formed in the pipe connecting portion when the tip of the pipe connecting portion is inserted into a predetermined position of the joint unit.

(One-touch mounting structure that locks the base of the pipe connection part)
The head forms an external thread on the distal end side of the pipe connecting part, and forms a ball fitting groove on the base side of the pipe connecting part,
A socket member, a lock ball, a sleeve member, a spring, and a stopper member of the joint unit are arranged corresponding to the position where the ball fitting groove is formed.

(One-touch mounting structure that locks the tip of the pipe connection part)
The head forms an external screw on the base side of the pipe connection part, and forms a ball fitting groove on the tip side of the pipe connection part,
A socket member, a lock ball, a sleeve member, a spring, and a stopper member of the joint unit are arranged corresponding to the position where the ball fitting groove is formed.

(Mounting structure with internal thread on socket)
Further, an inner screw for screwing the outer screw of the head is formed in the connection housing portion of the socket member.

(Tapered screw structure)
The external thread formed on the pipe connection part of the head is a taper male thread, and the internal thread of the socket member is a parallel thread. It is formed so as to be screwed together.

(Unwinding piping)
The socket member of the joint unit is a connection adapter that is integrally fixed to the tip of a flexible unwinding pipe.

(Basic effect)
In the head mounting structure of the present invention, for example, taking a sprinkler head as an example, as a joint unit, a socket member formed with a connecting and storing part for storing the pipe connecting part of the sprinkler head is formed below the joint member connected to the pipe side. A lock position that prevents the movement of the lock ball that is disposed and slidably disposed on the outer side of the socket member in a through hole formed in the peripheral wall of the socket member, and prevents the movement of the lock ball to the outside. It is possible to move between the lock release position that allows movement to the position, and the spring is urged the sleeve member in the direction of the lock position and locked to the lock position by the stopper member, while the sprinkler head is connected to the pipe When the tip of the joint is inserted into the joint unit at a predetermined position, When the pipe connection part of the sprinkler head is inserted into the connection storage part of the socket member in a state where the sleeve member is slid and held in the unlocking position, the sprinkler head is formed in the empty part of the external screw formed in the connection part. The ball fitting groove on the head side faces the lock ball arranged on the socket member side, and by returning the sleeve member to the lock position, the outside of the lock ball is regulated and held in a fixed state, and the sprinkler head The sprinkler head can be mounted and fixed on the joint unit side by a so-called one-touch operation of pushing the pipe connecting portion.

  For this reason, in the manufacturing test, by attaching the joint unit to the piping of the test machine, the sprinkler head pipe lotion part is attached to the joint unit on the test machine side without winding the seal tape around the screw part of the sprinkler head. It is possible to test by mounting and fixing simply and easily by one-touch operation of inserting and pushing.

  Further, as a derivative effect, when the sprinkler head is attached and fixed to the joint unit by a one-touch operation, the product is not damaged because it is sealed by pressure contact with the packing member disposed inside the socket member.

  In addition, when the test is completed, it can be easily and easily removed by one-touch operation of sliding the joint unit sleeve member to the unlocked position and pulling out the sprinkler head, and the seal tape is not used. This eliminates the need to remove and clean the seal tape, and no sealing tape is generated as waste material, which eliminates the need for disposal processing, increasing productivity and reducing costs.

  Also, in the field work, by installing the joint unit on the piping side, the sprinkler head can be mounted and fixed with one-touch operation, just like the testing machine, and the work efficiency of the field work can be improved and the cost can be reduced. And

(Effect of the structure that locks the base side of the pipe connection part)
In addition, the sprinkler head has an external thread formed on the distal end side of the pipe connecting portion and a ball fitting groove formed on the base side of the pipe connecting portion, and the socket of the joint unit corresponding to the position where the ball fitting groove is formed. Since the member, the lock ball, the sleeve member, the spring, and the stopper member are arranged, the sleeve member is slid on the side close to the sprinkler head, and unlocking and locking associated with the one-touch operation are possible.

(Effect of the structure that locks the tip of the pipe connection part)
In addition, the sprinkler head has an external thread formed on the base side of the pipe connecting part and a ball fitting groove formed on the tip side of the pipe connecting part. Since the member, the lock ball, the sleeve member, the spring, and the stopper member are arranged, the sleeve member is slid on the side close to the pipe away from the sprinkler head, and unlocking and locking associated with the one-touch operation are possible.

(Effects of mounting structure with internal threads on socket)
Furthermore, since the internal thread for screwing the external thread of the sprinkler head is formed in the connection housing part of the socket member, the movement of the pipe connection part on the sprinkler head side to a predetermined lock position in the joint unit can be moved by a screwing operation. This eliminates the need to forcefully push the sprinkler head side pipe joint to the locked position, and allows the sprinkler head to be moved to the locked position easily and easily.

(Effects of taper screw structure)
Further, the external thread formed on the pipe connecting portion of the sprinkler head is a taper male thread, the inner thread of the socket member is a parallel thread, and a predetermined reference length a (ISO) determined by the screw diameter from the screw tip of the taper male thread. Since it is formed so as to be screwed in the range before the standard), it will be screwed into the inner screw of the socket member before the length f of the effective screw portion exceeding the reference length a of the taper male screw. Since the screw thread of the taper male screw is screwed at a position where there is play, the sprinkler head side can be lightly turned and screwed into the lock position where the lock ball fits into the ball groove Can be easily and easily inserted.

(Effects of unwinding piping)
Also, since the joint member of the joint unit uses a connection adapter that is integrally fixed to the end of a flexible unwinding pipe, a socket member, a lock ball, a sleeve member, a spring, and a stopper member are prepared for the joint unit. If configured, the joint unit is completed, and the number of parts of the joint unit can be reduced to reduce the cost.

(Derivative effect of a single sprinkler head)
In addition, the sprinkler head is directly connected and fixed without using a joint unit and by winding a seal tape around the outer thread of the pipe connection part and screwing it into the end screw hole of the pipe or unwinding pipe, as in the conventional mounting structure. It is possible to manufacture the sprinkler head as a single product without using a joint unit and work on site, and by not using the joint unit, the sprinkler head production increases and the cost can be reduced. .

Explanatory drawing which showed 1st Embodiment which carries out the one-touch connection to the joint unit of the unwinding piping side by the base side lock of the piping connection part of a sprinkler head Explanatory drawing which showed 2nd Embodiment which provided the internal thread in the socket of FIG. Explanatory drawing showing a sprinkler head mounting structure for mounting and fixing the sprinkler head of FIG. 1 without using a joint unit Explanatory drawing which showed 3rd Embodiment connected to the joint unit of a piping side by one-touch connection by the front end side lock | rock of the piping connection part of a sprinkler head Explanatory drawing which showed 4th Embodiment which provided the internal thread in the socket of FIG. Explanatory drawing showing a sprinkler head mounting structure for mounting and fixing the sprinkler head of FIG. 4 without using a joint unit Explanatory drawing showing seal structure with O-ring Explanatory drawing showing another seal structure with O-ring Explanatory drawing showing another seal structure with O-ring Explanatory drawing showing conventional sprinkler head mounting structure

Hereinafter, embodiments will be described by taking a sprinkler head as an example of the head.
[First Embodiment of Sprinkler Head Mounting Structure]
FIG. 1 is an explanatory view showing a first embodiment in which a one-touch connection is made to a joint unit on the unwinding pipe side by a root side lock of a pipe connecting portion of a sprinkler head.

  As shown in FIG. 1, in the sprinkler head mounting structure of the present embodiment, a closed sprinkler head 10 is attached and fixed to an unwinding pipe 20 having a bendable bellows structure via a joint unit 12.

(Sprinkler head structure)
The sprinkler head 10 has an external thread 16 formed on the distal end side of the pipe connecting portion 14 formed on the upper portion, and a ball fitting groove used for fitting and fixing to the joint unit 12 side on the base side of the pipe connecting portion 14. 18 are formed at a plurality of locations on the outer periphery. The remaining structure of the sprinkler head 10 is the same as that of the conventional example shown in FIG.

(Fitting unit structure)
The joint unit 12 includes a joint 22 serving as a joint member attached as a connection adapter to the tip of the unwinding pipe 20, a packing 24 serving as a packing member, a socket 26 serving as a socket member, a sleeve 28 serving as a sleeve member, a lock ball 30, A spring 32 and a stopper ring 34 serving as a stopper member are used.

  The joint 22 has the tip of the stainless steel unwind pipe 20 fixed to the upper part by welding or the like, and the inner screw at the upper part of the socket 26 is screwed and fixed to the lower outer screw to form an internal flow path in the vertical axis direction. ing.

  The packing 24 is a ring-shaped sheet made of Teflon (registered trademark) or rubber, and is disposed in the lower flow path opening of the joint 22. The socket 26 is screwed and fixed to the lower side of the joint 22, holds the packing 24 by a presser portion 26 b formed in the middle, and forms a connection storage portion 26 a for storing the pipe connection portion 14 of the sprinkler head 10 inside. ing. The lock ball 30 is housed in a through hole formed in the lower peripheral wall of the socket 26 so as to be able to appear and retract, and is similarly arranged at a plurality of locations in the circumferential direction of the socket 26.

  The sleeve 28 is slidably disposed outside the socket 26 in which the lock ball 30 is housed, and is positioned outside the lock ball 30 at the lock position shown in the figure, and prevents movement to the outside of the lock ball 30 to prevent the sprinkler head 10. The lock ball 30 is fitted into the ball fitting groove 18 on the side to prevent it from coming off.

  Further, the sleeve 28 can be moved to an unlocking position that allows the lock ball 30 to move outward by sliding upward from the illustrated locking position. At the unlocking position, the ball fitting on the sprinkler head 10 side is possible. The fitting of the lock ball 30 to the groove 18 is released, the socket 26 is connected, and the pipe connecting portion 14 of the sprinkler head 10 can be attached to and detached from the storage portion 26a.

  The spring 32 is disposed on a step portion outside the lower portion of the socket 26, the lower end abuts against the sleeve 28, and urges the sleeve 28 toward the lock position. The stopper ring 34 is disposed on the tapered step portion on the outer side of the lower portion of the socket 26, receives the contact of the taper step portion formed on the lower inner side of the sleeve 28 at the illustrated locking position of the sleeve 28, and puts the sleeve 28 in the locking position. Lock.

(One-touch mounting operation of sprinkler head)
In the installation work of the sprinkler head 10, the unwinding pipe 20 provided with the joint 22 at the tip is lowered from the ceiling to the mounting hole 42 formed in the ceiling surface 40, and is brought to a predetermined height by an angle material or the like. Support and fix.

  Subsequently, the assembly of the joint unit 12 assembled from the lower side of the joint 22 by the packing 24, the socket 26, the sleeve 28, the lock ball 30, the spring 32 and the stopper ring 34 is prepared. Then, the joint unit 12 is assembled to the tip of the unwinding pipe 20.

  Subsequently, the pipe connection part 14 of the sprinkler head 10 is inserted into the connection storage part 26 a of the socket 26 positioned below the joint unit 12. In this case, the sleeve 28 of the joint unit 12 is moved upward to the unlocked position, allowing the lock ball 30 to move outward, and the pipe connecting portion 14 of the sprinkler head 10 is not obstructed by the lock ball 30. It can be inserted.

  When the pipe connecting portion 14 of the sprinkler head 10 is pushed into the connecting and storing portion 26a of the socket 26, the tip 14a comes into contact with the packing 24 and stops. When the ball fitting groove 18 on the sprinkler head 10 side opposes and the operation of moving the sleeve 28 to the unlocked position is released and returned to the locked position, the lock ball 30 is pushed into the ball fitting groove 18, and the lock ball 30. Then, the sprinkler head 10 is attached and fixed to the joint unit 12 side.

  If the sprinkler head 10 is attached and fixed to the joint unit 12, the sealing plate 44 is inserted into the attachment hole 42 from the ceiling surface 40 side and the upper part is fitted and supported on the sprinkler head 10 to close the gap of the attachment opening. .

  The sprinkler head 10 can be attached to the joint unit 12 by a so-called one-touch operation in which the pipe connection portion 16 of the sprinkler head 10 is pushed into the joint unit 12 from below, and a seal tape is attached to the thread portion of the sprinkler head. It eliminates the need for winding work, increases work efficiency in field work, and enables cost reduction.

  When the sprinkler head 10 is replaced with a new one by renewal work, the sleeve 28 of the joint unit 12 is moved to the upper unlocking position to release the fitting of the lock ball 30 to the ball fitting groove 18. By pulling the sprinkler head 10 downward in this state, it can be easily removed and easily replaced with a new one.

  Here, the external screw 16 formed in the pipe connecting portion 14 is not used for attaching and fixing the sprinkler head 10 to the joint unit 12, and the external screw 16 is not necessary for attachment / detachment by a one-touch operation. However, the sprinkler head 10 is not used in combination with the joint unit 12 of the present embodiment, and the sprinkler head 10 can be mounted and fixed on the pipe side alone, so that the sprinkler head 10 is formed on the pipe connecting portion 14. The external screw 16 is provided. Further, the external thread 16 formed on the pipe connecting portion 14 is used to realize a function of assisting an operation of pressing the pipe connecting portion 14 to the packing 24 in the joint socket 12 as shown in an embodiment described later. ing.

  Further, the sprinkler head 10 has the external thread 16 formed on the distal end side of the pipe connecting portion 14 and the ball fitting groove 18 formed on the base side of the pipe connecting portion 14, so that the joint unit 12 is closer to the sprinkler head 10. The sleeve 28 is slid and unlocked and locked in accordance with the one-touch operation.

  Further, since the joint 22 of the joint unit 12 uses a connection adapter that is integrally fixed to the tip of the bendable unwinding pipe 20, the socket 26, the lock ball 30, the sleeve 28, the spring 32, and the stopper are used for the joint unit 12. If the ring 34 is prepared and assembled, the joint unit 12 is completed, and the number of parts of the joint unit 12 can be reduced to reduce the cost.

(Use with testing machine)
As for the testing machine used for the production test of the sprinkler head 10, an unwinding pipe having a joint 22 fixed to the tip is provided as a pipe of the testing machine, and the joint unit 12 is attached to the tip as shown in FIG. The manufactured sprinkler head 10 is attached and fixed to the joint unit 12 by a one-touch operation and a predetermined test is performed. When the test is completed, the sprinkler head 10 is removed by a one-touch operation and the next test is performed.

  In this case, it is not necessary to wrap the seal tape around the external thread 16 of the sprinkler head 10, and even when the test is completed, since the seal tape is not used, it is not necessary to remove and clean the seal tape. No sealing tape is generated as waste material, and no disposal is required, increasing productivity and reducing costs.

  In addition, when the sprinkler head 10 is mounted and fixed to the joint unit 12 by one-touch operation, the product is damaged by the pressure contact of the pipe connecting portion 14 of the sprinkler head 10 to the packing 24 arranged inside the joint unit 12. I can't.

[Second Embodiment of Sprinkler Head Mounting Structure]
FIG. 2 is an explanatory view showing a second embodiment of a sprinkler head mounting structure in which an internal thread is provided in a socket.

(Packing pressure welding assist function)
As shown in FIG. 2, in the joint unit 12 of the present embodiment, when the internal thread 36 is formed in the connection housing portion 26 a of the socket 26 and the sprinkler head 10 is attached and fixed to the joint unit 12, the piping of the sprinkler head 10 is provided. The external screw 16 formed on the connecting portion 14 is screwed in, and the operation of pressing the tip 14a of the pipe connecting portion 14 to the packing 24 is made possible by screwing.

  As a result, it is not necessary to push the pipe connecting portion 14 on the sprinkler head 10 side to the lock position and press the packing connection portion 14 against the packing 24, and the sprinkler head can be moved to the lock position easily and easily.

  Since the other structure is the same as that of the embodiment of FIG. 1, the same reference numerals are given and the description thereof is omitted.

(Tapered screw structure)
Here, the external thread 16 formed on the pipe connecting portion 14 of the sprinkler head 10 is a taper male screw, and as a standard of ISO, the taper male screw exceeds a predetermined reference length a determined by the screw diameter from the screw tip. The minimum value of the effective thread length f is determined. When this tapered male screw is screwed into, for example, a parallel female screw having the same nominal diameter, there is play between the screw threads up to the reference length a, and when the screw is screwed into the effective screw portion beyond the reference length a. The degree of adhesion between the screw threads becomes stronger as the screw is screwed in, and confidentiality is ensured.

  Such a taper male screw serving as the external screw 16 is formed so as to satisfy the minimum value of the length f of the effective screw portion exceeding the reference length a in accordance with the ISO standard. The inner screw 36 is a parallel screw, and the inner screw 36 is formed so as to be screwed in a range in front of a predetermined reference length a determined by the screw diameter from the tip of the tapered male screw.

  For this reason, the taper male screw which becomes the outer screw 16 is screwed into the inner screw 36 of the socket 26 just before the length f of the effective screw portion exceeding the reference length a. Since it is screwed at a position where there is play before the mountain comes into close contact, it is possible to screw the outer screw 26 into the inner screw 36 on the socket 26 side by turning the sprinkler head 10 lightly, and the pipe connecting portion 14 When the tip 14a of the metal plate 14 comes into contact with the packing 24, the assist function is realized by making sure that the tip 14a is firmly pressed and sealed.

(Sprinkler head mounting operation)
The sprinkler head 10 is attached to the joint unit 12 attached to the end of the unwinding pipe 20 by placing the pipe connection portion 14 of the sprinkler head 10 in the connection storage portion 26a of the socket 26 located below the joint unit 12. After the insertion and the outer screw 16 hits the inner screw 36, the sprinkler head 10 is turned in the screwing direction with the sleeve 28 moved upward to the unlocked position.

  By screwing the outer screw 16 of the sprinkler head 10 into the inner screw 36 on the socket 26 side, the pipe connecting portion 14 moves upward and the tip 14a hits the packing 24. The sealed state is in pressure contact with the packing 24.

  At this time, the ball fitting groove 18 of the pipe connecting portion 14 is at a position opposite to the lock ball 30 on the socket 26 side, and the lock ball 30 is pushed into the ball fitting groove 18 by returning the sleeve 28 to the lock position. The sprinkler head 10 is attached and fixed to the joint unit 12 side via the lock ball 30.

  The operation of attaching the sprinkler head 10 to the joint unit 12 as described above is not a one-touch operation of simply pushing in as in the case of FIG. 1, but the pipe connecting portion 14 of the sprinkler head 10 is inserted into the joint unit 12 and the inside This is a relatively simple operation of screwing, and the screwing of the external screw 16 into the internal screw 36 is an effective screw portion within the range of the reference length a of the tapered male screw forming the external screw 16. Since it is screwed in the part that does not enter the length f, it can be screwed by turning the sprinkler head 10 side lightly, and it can be screwed in strongly at the end when it hits the packing 24, and does not require a tool and is relatively simple. Can be fixed by operation.

  Further, as in the embodiment of FIG. 1, when the sleeve 28 is returned to the locked position and locked, there is no need to press and hold the sprinkler head 10 so as to come into pressure contact with the packing 24. Become.

[Single product mounting structure of sprinkler head]
FIG. 3 is an explanatory view showing a sprinkler head mounting structure in which the sprinkler head of FIG. 1 is mounted and fixed to a pipe alone without using a joint unit.

  As shown in FIG. 3, when the sprinkler head 10 of FIG. 1 is used alone without using the joint unit 12, the sprinkler head is inserted into the screw hole of the different diameter socket 48 connected to the tip of the pipe 46. The external screw 16 formed in the 10 pipe connecting portions 14 is screwed and fixed. In this case, the ball fitting groove 18 is formed on the base side of the pipe connecting portion 14, but the ball fitting groove 18 does not interfere with the screwing of the external screw 16 into the socket 48 with different diameters, and the sprinkler The head 10 can be used as a single product.

  Thus, by not using the joint unit 12 as essential, the production amount of the sprinkler head 10 increases, and the cost can be reduced.

[Third Embodiment of Sprinkler Head Mounting Structure]
FIG. 4 is an explanatory view showing a third embodiment in which a one-touch connection is made to a pipe-side joint by a tip side lock of a pipe connecting portion of a sprinkler head.

  As shown in FIG. 4, in the sprinkler head mounting structure of the present embodiment, the closed sprinkler head 10 is fixedly attached to the pipe 46 via the joint unit 12.

(Sprinkler head structure)
The sprinkler head 10 has an external thread 16 formed on the base side of the pipe connecting portion 14 formed on the upper portion, and a ball fitting groove used for fitting and fixing to the joint unit 12 side on the distal end side of the pipe connecting portion 14. 18 are formed at a plurality of locations on the outer periphery.

(Fitting unit structure)
The joint unit 12 includes a joint 22, a packing 24, a socket 26, a sleeve 28, a lock ball 30, a spring 32, and a stopper ring 34, and the ball fitting groove 18 on the sprinkler head 10 side is formed on the distal end side of the pipe connecting portion 14. Since it is provided, the joint 22, the packing 24, the socket 26, the sleeve 28 serving as a sleeve member, the lock ball 30, the spring 32, and the stopper ring 34 are disposed so as to correspond to this position.

  Since other structures and one-touch operation are the same as those in the embodiment of FIG. 1, the description thereof is omitted.

  As described above, the sprinkler head 10 has the external thread 16 formed on the base side of the pipe connecting portion 14 and the ball fitting groove 18 formed on the distal end side of the pipe connecting portion 14. The socket 28 is slid on the near side to enable unlocking and locking associated with the one-touch operation.

[Fourth Embodiment of Sprinkler Head Mounting Structure]
FIG. 5 is an explanatory view showing a fourth embodiment of a sprinkler head mounting structure in which an internal screw is provided in the socket of FIG.

(Packing pressure welding assist function)
As shown in FIG. 5, in the joint unit 12 of the present embodiment, when the internal thread 36 is formed in the connection housing portion 26 a of the socket 26 and the sprinkler head 10 is attached and fixed to the joint unit 12, the piping of the sprinkler head 10 is provided. It is possible to assist by screwing in the operation of screwing the external screw 16 formed in the connecting portion 14 and pressing the tip 14a of the pipe connecting portion 14 against the packing 24.

  Since other structures are the same as those of the embodiment of FIG. 4, the same reference numerals are given and description thereof is omitted.

(Tapered screw structure)
Moreover, the external thread 16 formed in the pipe connection part 14 of the sprinkler head 10 is a taper male thread, and satisfies the minimum value of the length f of the effective thread part exceeding the reference length a in accordance with the ISO standard. The inner screw 36 of the socket 26 is a parallel screw, and the inner screw 36 is screwed within a range of a predetermined reference length a determined by the screw diameter from the tip of the tapered male screw. Is forming.

  For this reason, the taper male screw which becomes the outer screw 16 is screwed into the inner screw 36 of the socket 26 just before the length f of the effective screw portion exceeding the reference length a. Since it is screwed at a position where there is play before the mountain comes into close contact, it is possible to screw the outer screw 26 into the inner screw 36 on the socket 26 side by turning the sprinkler head 10 lightly, and the pipe connecting portion 14 When the tip 14a of the metal plate 14 comes into contact with the packing 24, the assist function is realized by making sure that the tip 14a is firmly pressed and sealed.

[Single product mounting structure of sprinkler head]
FIG. 6 is an explanatory view showing a sprinkler head mounting structure in which the sprinkler head of FIG. 4 is mounted and fixed to a pipe as a single unit without using a joint unit.

  As shown in FIG. 6, when the sprinkler head 10 of FIG. 4 is used alone without using the joint unit 12, the sprinkler head is inserted into the screw hole of the different diameter socket 48 connected to the tip of the pipe 46. The external screw 16 formed in the 10 pipe connecting portions 14 is screwed and fixed. In this case, the ball fitting groove 18 is formed on the distal end side of the pipe connecting portion 14, but the ball fitting groove 18 does not hinder the screwing of the external screw 16 into the socket 48 of different diameter, and the sprinkler The head 10 can be used as a single product.

  Thus, by not using the joint unit 12 as essential, the production amount of the sprinkler head 10 increases, and the cost can be reduced.

[Seal structure with O-ring]
7 to 9 are explanatory views showing a seal structure using an O-ring.

  In the seal structure shown in FIG. 7, an O-ring 50 is attached to a seal groove 52 formed at the tip of the ball fitting groove 18 in the pipe connecting portion 14 of the sprinkler head 10, and the inner peripheral surface of the socket 26 located outside. The inside is sealed tightly. A thin packing 24a is disposed between the joint 22 and the socket 26 for sealing. The other configuration is the same as that of the embodiment of FIG.

  In the seal structure shown in FIG. 8, a seal groove 54 is formed on the peripheral surface of the lock ball 30 fitted to the socket 26, and an O-ring 50 is mounted. The inside is sealed tightly. A thin packing 24a is disposed between the joint 22 and the socket 26 for sealing. The other configuration is the same as that of the embodiment of FIG.

  The seal structure shown in FIG. 9 is formed by integrally forming a small-diameter inner cylindrical portion 26a on the inner peripheral side of the socket 26 and forming a tubular groove 26b on the lower side of the inner cylindrical portion 26. 14 can be inserted, a seal groove 56 is formed on the inner peripheral surface of the pipe connecting portion 14 and an O-ring 50 is mounted, and is in close contact with the opposing surface of the annular groove 26b provided in the socket 26 located inside. And the inside is sealed. A thin packing 24a is disposed between the joint 22 and the socket 26 for sealing. The other configuration is the same as that of the embodiment of FIG.

  Such a seal structure using an O-ring can be applied to other embodiments as necessary.

[Modification of the present invention]
The unwinding pipe 20 and the joint 22 of the joint unit 12 shown in the embodiment of FIGS. 1 and 2 may be replaced with the pipe 46 and the joint 22 shown in the embodiment of FIGS. 4 and 5. The pipe 46 and the joint 22 shown in the embodiment of FIGS. 4 and 5 may be replaced with the unwinding pipe 20 and the joint 22 of the joint unit 12 shown in the embodiments of FIGS. 1 and 2.

  Further, in the embodiment of FIGS. 1 and 5, the external screw 16 formed on the pipe connecting portion 14 of the sprinkler head 10 is not used for mounting and fixing to the joint unit 12. It is good also as the cylindrical piping connection part 14. FIG.

  Moreover, although said embodiment took a sprinkler head as an example, it is not limited to the presence or absence of a heat sensitive part, and it is not limited also to an attachment direction, Similarly, a foam head, a heat sensitive water discharge joint, a water discharge type head It can also be applied to a fire extinguishing head such as a gas discharge port.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Sprinkler head 12: Joint unit 14: Pipe connecting portion 16: External screw 18: Ball fitting groove 20: Unwinding pipe 22: Joint 24: Packing 26: Socket 28: Sleeve 30: Lock ball 32: Spring 34: Stopper Ring 36: Inner thread 40: Ceiling surface 42: Mounting hole 44: Sealing plate 46: Piping 48: Different diameter joint 50: O-ring

Claims (6)

In the head mounting structure in which the head with external threads formed on the upper pipe connection part is mounted and fixed to the pipe side via the joint unit.
The joint unit is
A joint member that is fixed to the pipe or formed with a threaded portion that connects to the pipe, has a flow path formed therein, and is opened up and down;
A socket member disposed on the lower side of the joint member, in which a connection storage portion for storing the pipe connection portion of the head is formed;
A lock ball housed in a through-hole formed in the peripheral wall of the socket member so as to freely enter and exit;
A sleeve member that is slidably disposed outside the socket member and is movable between a lock position that prevents the lock ball from moving outward and a lock release position that allows the lock ball to move outward. When,
A spring for urging the sleeve member in the direction of the lock position;
A stopper member for locking the sleeve member biased by the spring at the lock position;
With
The head has a ball fitting groove for fitting and locking the lock ball when the tip of the pipe connecting portion is inserted into a predetermined position of the joint unit. A head mounting structure characterized by being formed in a vacant part.
In the head mounting structure according to claim 1,
The head forms the external thread on the distal end side of the pipe connecting part, and forms the ball fitting groove on the base side of the pipe connecting part,
A head mounting structure in which a socket member, a lock ball, a sleeve member, a spring, and a stopper member of the joint unit are arranged corresponding to the position where the ball fitting groove is formed.
In the head mounting structure according to claim 1,
The head forms the external thread on the base side of the pipe connecting part, and forms the ball fitting groove on the tip side of the pipe connecting part,
A head mounting structure in which a socket member, a lock ball, a sleeve member, a spring, and a stopper member of the joint unit are arranged corresponding to the position where the ball fitting groove is formed.
2. The head mounting structure according to claim 1, further comprising: an inner screw into which an outer screw of the head is screwed in the connection housing portion of the socket member.
In the head mounting structure according to claim 4,
The external thread formed in the pipe connection part of the head is a taper male thread,
A head mounting structure characterized in that the inner screw of the socket member is a parallel screw and is screwed within a range of a predetermined reference length determined by a screw diameter from the tip of the tapered male screw. .
  2. The head mounting structure according to claim 1, wherein the joint member of the joint unit is a connection adapter fixed integrally to a distal end of a flexible unwinding pipe.

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