JP2008119771A - Mounting tool for sprinkler head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent deformation or damage of connecting pipe by temporarily fixing the unfixed connecting pipe without breaking the ceiling opening part and its periphery when mounting or dismantling a sprinkler head to a head screw part of the connecting pipe. <P>SOLUTION: A mounting tool is composed of a working tool 3 turnably pivoted at the upper end part of an operating lever 2, the working tool 3 has a jaw part 31 forming an opening 3a of an inner surface distance corresponding to an opposite side dimension of the head screw part 13 of the connecting pipe 12, is inserted to a ceiling back side through the gap between an inner peripheral surface of an opening part 14a formed on the ceiling 14 and an outer peripheral surface of the sprinkler head 11, and the jaw part 31 of the working tool 3 turned to the operating lever 2 supports by sandwiching two opposed surfaces of the head screw part 13 of the connecting pipe 12. When operating to rotate the sprinkler head 11, the connecting pipe 12 can be supported so as not to be rotated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a construction jig used when a sprinkler head is attached to or detached from a connecting pipe.

  Conventionally, a sprinkler head is screwed to a head screwed portion formed at one end of a connecting pipe, and the other end of the connecting pipe is connected to a fire extinguishing pipe that is piped on the back side of the ceiling. Connected through.

Here, as the connecting pipe, a stainless steel flexible pipe having a bellows portion is adopted, which makes it possible to connect a short pipe using a pipe joint such as an elbow to form a connecting pipe. Thus, the number of parts is reduced, there is no water leakage, and there are advantages such as easy construction and excellent safety (for example, see Patent Document 1).
Utility Model Registration No. 2550505

  By the way, when the sprinkler head is attached to or detached from the head screwed portion of the connecting pipe, the connecting pipe is not fixed. Therefore, when the sprinkler head is directly rotated with respect to the head screwed portion of the connecting pipe, the flexible pipe The connecting pipe may be deformed and damaged.

  For this reason, under the present circumstances, the opening around the ceiling for attaching the sprinkler head is broken to make a large opening, and a pipe wrench or the like is inserted through the gap to fix the head screwed portion of the connection pipe, and the head is turned in this state. The sprinkler head is rotated and removed by using the. As a result, there is a problem that workability is lowered, the construction period is prolonged, and the cost is increased.

  In addition, when fixing the head screwed part of the connecting pipe using a special fixing bracket, a jig for fixing the fixing bracket so as not to rotate and restricting the co-rotation of the flexible pipe has also been proposed, When a special fixing bracket is not used, that is, when the connecting pipe is not fixed, it cannot be adopted.

  The present invention has been made in view of such problems. When the sprinkler head is attached to or removed from the head screwed portion of the connection pipe, the connection pipe is temporarily removed without breaking the ceiling opening. The sprinkler head construction jig is provided that can be fixed and secured to prevent the deformation and damage of the connecting pipe.

  The present invention comprises a working tool pivotally supported on the upper end portion of the operating lever, and the working tool has a jaw portion formed with an opening having an inner surface interval corresponding to the opposite side dimension of the head screwed portion of the connecting pipe. Then, it is inserted into the back of the ceiling through the gap between the inner peripheral surface of the opening formed in the ceiling and the outer peripheral surface of the sprinkler head, and its jaw part rotates with respect to the operation lever to face the head screwed part of the connecting pipe. The two surfaces are sandwiched and supported.

  According to the present invention, the work tool of the construction jig is inserted into the back of the ceiling through the gap between the inner peripheral surface of the opening formed in the ceiling and the outer peripheral surface of the sprinkler head, and the work tool is rotated with respect to the operation lever. Then, the opposite two surfaces of the head screwed portion of the connecting pipe are sandwiched between the jaws and temporarily fixed so as not to rotate. In this state, when the sprinkler head is rotated, the connection pipe can be reliably prevented from rotating with the rotation of the sprinkler head.

  As a result, it is possible to prevent deformation and damage accompanying rotation of the connecting pipe.

  According to the present invention, when the sprinkler head is attached to or detached from the head screwed portion of the connection pipe, the connection pipe that is not fixed is temporarily fixed without breaking the periphery of the ceiling opening. It is possible to work while preventing deformation and damage.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment of the sprinkler head construction jig of the present invention.

  The construction jig 1 includes an operation lever 2 bent in an L shape, and a work tool 3 formed in a substantially H shape that is pivotally supported on the upper end portion of the operation lever 2. ing. The operation lever 2 has a mounting portion 21 at the upper end thereof. Further, the work tool 3 is connected to the sprinkler head 11 and corresponds to the opposite side dimension (width of two opposing surfaces) of the head screwed portion 13 provided at the other end of the connection tube 12 which is a stainless steel flexible tube. It has a jaw part 31 in which an opening 3a with an inner surface interval is formed, and an attachment piece 32 in which an opening 3b with an inner surface interval corresponding to the width of the attachment part 21 of the operation lever 2 is formed. Accordingly, the shaft pin 4 is inserted into the pin hole 2x formed in the attachment portion 21 of the operation lever 2 through the pin hole 3x formed in each attachment piece 32 of the work tool 3, so that the operation lever 2 is operated. The tool 3 can be pivotally supported. In this case, the size of the work tool 3 is set so as to rotate between an insertion position that forms a plane continuous to the operation lever 2 and a work position that is bent 90 degrees with respect to the operation lever 2. Yes. In order to prevent stress concentration from occurring at the base of the jaw part 31, the base is subjected to R processing.

  Here, the opening 14a of the ceiling 14 to which the sprinkler head 11 is attached differs depending on the manufacturer and the product, but there are many about 50 mm, and the outer diameter of the sprinkler head 11 is about 40 mm. The difference between the inner peripheral surface of the opening 14a and the outer peripheral surface of the sprinkler head 11 is 5 mm in the radial direction. For this reason, since the thickness of the construction jig 1 is about 5 mm at the maximum, it is necessary to form the construction jig 1 with a steel material or the like to ensure the support strength of the head screw-in portion 13.

  As shown in FIG. 2, the head turning 5 for rotating the sprinkler head 11 is formed on the upper end surface of the cylindrical main body 51 at an interval in the circumferential direction on the outer peripheral surface of the sprinkler head 11. A plurality of claw pieces 52 corresponding to the plurality of grooves 11a are formed so as to protrude, and an insertion hole 5a penetrating in the diameter direction is formed in the base end portion of the main body 51.

  Therefore, by engaging the claw piece 52 of the head turning 5 with the groove 11a of the sprinkler head 11, inserting a screwdriver or the like into the insertion hole 5a, and rotating the main body 51, the sprinkler head 11 is connected to the connection pipe 12. It can be screwed into the head screwed portion 13 or can be removed by loosening.

  Next, a procedure for replacing the sprinkler head 11 using the construction jig 1 configured as described above together with the head turning 5 will be described.

  First, the claw piece 52 of the head turning 5 is engaged with the groove 11a of the sprinkler head 11, and the construction jig 1 is lifted along the outer peripheral surface of the main body 51 with the head turning 5 held (see FIG. 3). ). Thereby, the work tool 3 of the construction jig 1 is inserted into the back of the ceiling through the gap between the inner peripheral surface of the opening 14a of the ceiling 14 and the outer peripheral surface of the sprinkler head 11 (see FIG. 4). Next, the work tool 3 of the construction jig 1 is rotated 90 degrees around the shaft pin 4, and the jaw portion 31 is dropped so as to sandwich the two opposing surfaces of the head screwed portion 13 of the connection pipe 12. Therefore, by holding the construction jig 1, the head screwed portion 13 of the connection pipe 12 can be supported so as not to rotate via the jaw portion 31 of the work tool 3. Thus, in a state where the rotation of the connecting pipe 12 is blocked by the construction jig 1, a screwdriver or the like is inserted into the insertion hole 5 a of the head turning 5 and the main body 51 is rotated, whereby the sprinkler head 11 is moved. It can be loosened and removed with respect to the head screw-in part 13 of the connecting pipe 12. At this time, it is possible to hold the connection pipe 12 head screwed portion 13 to rotate with the rotation of the sprinkler head 11 so as not to rotate via the construction jig 1.

  If the sprinkler head 11 is removed, a new sprinkler head is screwed into the head screwed portion 13 of the connecting pipe 12 and finally the head screwed portion 13 is held by the construction jig 1 so as not to rotate. The sprinkler head 11 may be tightened with respect to the head screwed portion 13 of the connecting pipe 12 by rotating the operation 5.

  When the replacement work of the sprinkler head 11 is completed, the head turning 5 is detached from the sprinkler head 11 and the construction tool 1 is pulled down to form a plane in which the work tool 3 is continuous with the operation lever 2. While rotating 90 degrees in the opposite direction, it can be pulled out from the back of the ceiling through the gap between the inner peripheral surface of the opening 14 a of the ceiling 14 and the outer peripheral surface of the sprinkler head 11.

  Thereafter, the same operation is performed, and the other sprinkler heads 11 may be replaced.

  As a result, the head screw-in portion 13 of the connection pipe 12 can be temporarily fixed so as not to rotate, and the sprinkler head 11 can be attached or detached while reliably preventing deformation or damage of the connection pipe 12. Moreover, it can be constructed by one operator without breaking the periphery of the ceiling opening from the indoor side, and the sprinkler head 11 can be attached and detached in a short time.

  In the above-described embodiment, the case where the head screwed portion 13 of the connecting pipe 12 is formed as a female screw while the sprinkler head 11 is formed as a male screw has been described. However, the head screwed portion 13 of the connecting pipe 12 is formed as a male screw. On the other hand, even if the sprinkler head 11 is formed on the female screw, the same operation can be performed.

It is a perspective view which shows one Embodiment of the sprinkler head construction jig of this invention. It is a perspective view which shows the head turning which rotates a sprinkler head. It is explanatory drawing explaining the construction point in the case of removing a sprinkler head using the construction jig of FIG. It is explanatory drawing explaining the construction point in the case of removing a sprinkler head using the construction jig of FIG. It is explanatory drawing explaining the construction point in the case of removing a sprinkler head using the construction jig of FIG. 1, and its top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Construction jig 2 Operation lever 3 Working tool 31 Jaw part 5 Head turning 11 Sprinkler head 12 Connection pipe 13 Head screwing part 14 Ceiling 14a Opening part

Claims (1)

  It consists of a working tool pivotally supported at the upper end of the operating lever, and the working tool has a jaw part formed with an opening having an inner surface interval corresponding to the opposite side dimension of the head screwed part of the connecting pipe, and is provided on the ceiling. It is inserted into the back of the ceiling through the gap between the inner peripheral surface of the formed opening and the outer peripheral surface of the sprinkler head, and its jaw part rotates with respect to the operating lever so that the two opposite surfaces of the head screw-in part of the connecting pipe are A sprinkler head construction jig characterized by being sandwiched and supported.

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