JP2003287183A - Diversion saddle joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diversion saddle joint capable of repairing or removing a branch pipe without stopping water supply to piping, and capable of dispensing with stoppage of the branch pipe with a cap or the like after removing the branch pipe. <P>SOLUTION: This diversion saddle joint is composed of a vertical cylinder part having non-penetrating hole saw installed inside and provided with a branch pipe connection part and a saddle part straddling over piping. The hole saw having an edge part provided on a piping side end part is installed in the vertical cylinder part movably in the vertical direction with male threads provided on an outer circumference surface of a roughly center part thereof threadedly engaged with female threads provided on an inner circumference surface of the vertical cylinder part of the diversion saddle joint. The outer diameter of the male thread part is larger than the outer diameter of the edge part, and a step part is formed between the male thread part and the edge part and annular rubber packing is installed on the whole circumference of the step part. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water diversion saddle joint used to pipe a water distribution branch pipe to a pipe such as a water supply pipe. 2. Description of the Related Art Conventionally, a water diversion saddle joint is used when a water distribution branch pipe is installed in a water supply pipe or the like. As such a diversion saddle joint, for example, as shown in FIG. 5 (a), a vertical cylindrical portion c having a branch pipe connecting portion b at a saddle portion a
Are provided, and a female screw provided in the vertical cylindrical portion c and a male screw provided on the outer peripheral surface of the bottomed cylindrical hole saw d on the main body bottom side are vertically movably mounted in a screwed state, and the vertical cylindrical portion is provided. The cap f is provided with a cap f at the upper end thereof via an annular packing e. [0003] The hole saw d used for the water diversion saddle joint is shown in FIG. 6 after the water diversion saddle joint is connected to the pipe g.
As shown in (b), it is pulled up above the cylindrical member c, and water is passed from the pipe g to the water distribution branch pipe h. In addition, the cut piece i at the time of perforation remains in a state fitted in the hole saw d. [0004] In the case of such a conventional diversion saddle joint, when the diversion saddle joint is joined to the pipe, the water can be stopped, so that the diversion saddle joint can be connected while passing the pipe. However, there was no function to stop the water from the pipes to the branch pipes when repairing or removing the branch pipes became unnecessary. [0005] That is, when repairing or removing a branch pipe, the branch pipe is repaired or cut and removed by temporarily shutting off water flow in the pipe by a gate valve or the like. Later, the cut portion is closed with a cap or the like, which is troublesome. The present invention solves the above-mentioned conventional problems, and when repairing or removing a branch pipe, the branch pipe can be repaired or removed without stopping water flow through the pipe. Further, it is an object of the present invention to provide a water diversion saddle joint that does not require the closing of the branch pipe by a cap or the like after the removal of the branch pipe. According to the present invention, there is provided a vertical cylinder having a non-penetrating hole saw mounted therein and having a branch pipe connecting portion, and a saddle portion straddling the piping. Wherein the hole saw provided with a blade at the end on the pipe side has a male screw provided on the outer peripheral surface at a substantially central portion thereof and an inner peripheral surface of a vertical cylindrical portion of the water diversion saddle joint. Is screwed into the female screw provided in the vertical cylinder part, is mounted vertically movably, the outer diameter of the male screw part is larger than the outer diameter of the blade part, and the step between the male screw part and the blade part is The water diversion saddle joint is characterized in that an annular rubber packing is mounted on the entire circumference of the stepped portion. The diversion saddle joint according to the present invention has a non-penetrating hole saw mounted inside, and is composed of a vertical cylindrical portion having a branch pipe connection portion and a saddle portion straddling the piping. A joint, wherein the hole saw provided with a blade portion at a pipe side end has a male screw provided on an outer peripheral surface at a substantially central portion thereof and a female screw provided on an inner peripheral surface of a vertical cylinder portion of the water distribution saddle joint. The outer diameter of the external thread is larger than the outer diameter of the blade, and the step between the external thread and the blade is a step, and the entire circumference of the step is The annular rubber packing is mounted on the pipe, so that the hole saw is screwed into the pipe side and pushed into the pipe side, and the annular rubber packing is pressed against the through hole drilled in the pipe to stop the pipe from connecting to the vertical pipe section. Water is completely done. Therefore, when repairing or removing a branch pipe,
The branch pipe removal operation can be performed without stopping the flow of water through the pipe, and it is not necessary to close the branch pipe with a cap or the like after removing the branch pipe. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the water dividing saddle joint of the present invention. First, the structure of one example of the water diversion saddle joint of the present invention will be described. In the water diversion saddle joint 1, an opening 111 is provided in a saddle portion 11 that straddles a portion of the pipe to be diverted. An electric heating wire 112 is embedded in the inner wall of the saddle portion 11, and a terminal (not shown) communicating with the electric heating wire 112 is provided on the surface. A vertical cylindrical portion 12 is provided outward from the peripheral wall of the opening 111 of the saddle portion 11. The vertical pipe section 12 is provided with a branch pipe connection section 13. Vertical cylinder 12
A female screw 121 is provided on an inner surface other than the upper part of the female screw 121. The inner surface of the upper part of the vertical cylindrical portion 12 has a concave groove 12 along the circumferential direction.
2 are provided. The annular packing 15 is mounted in the concave groove 122. A female screw 113 for mounting a drilling jig is provided on the upper outer surface of the vertical cylindrical portion 12. Reference numeral 14 denotes a non-penetrating hole saw, which is provided with a male screw 141 on the outer peripheral surface at a substantially central portion on the non-penetrating portion 145 side. At the lower part of the hole saw 14, a cylindrical blade portion 142 for piercing a portion of the pipe to be divided is provided. The outer diameter of the male screw 141 is made larger than the outer diameter of the blade portion 142, and a step 143 therebetween has an annular rubber packing 144.
Is installed. A locking portion 146 is provided on the upper end surface of the hole saw 14 for locking the tip of the rotating rod of the drilling jig. A hole saw 14 is mounted in the vertical cylindrical portion 12 so as to be vertically movable in a screwed state between the male screw 121 and the female screw 141. Then, the hole saw 14 is moved below the vertical cylindrical portion 12 so that the blade 1
By rotating the hole saw 42 and punching the through hole, the hole saw 14 can be moved above the vertical cylindrical portion 12, and the outer surface of the upper portion of the hole saw 14 and the vertical cylindrical portion 12 can be moved by the annular packing 15. The inside of the upper part is sealed so that it can be closed in the upper part of the vertical cylindrical part 12. The hole saw 14 has a non-penetrating portion 145 and is closed off from the vertical cylindrical portion 12 by an annular packing 15, so that the water separating saddle joint 1 is attached to the pipe, or after the water dividing saddle joint 1 is attached, during use. Do not leak out. The outer diameter of the through hole formed in the pipe is the same as the outer diameter of the hole saw blade 142. Therefore, the vertical cylindrical portion 12 is caught by the through hole in which the step portion 143 is drilled, and does not enter the through hole. FIG. 2 shows the water dividing saddle joint of FIG.
It is sectional drawing which shows the state in which the hole saw 14 was pushed in to the piping and the annular rubber packing 144 was pressed against the outer surface of the piping. In this state, the annular rubber packing 14
4 is pressed and deformed so as to be crushed between the edge of the hole formed in the pipe and the step 143. Therefore, when cutting off the branch pipe beyond the branch pipe connection portion 13, the annular rubber packing 144 prevents water or the like from entering the vertical pipe 12 from the pipe, and prevents water from flowing into the branch pipe. Therefore, in this state, the branch pipe can be cut freely without stopping the flow of water in the pipe. As described above, the annular rubber packing 144 has a function of pressing against the edge of the through hole formed in the pipe and the step 143 to stop water. The material is not particularly limited as long as it is rich in elasticity, excellent in water resistance and long-term creep property, and may be any rubber as long as it is a rubber generally used as a waterproof rubber. Further, since it is only necessary that the water-stopping effect is obtained when the shape is crushed and deformed, the outer shape of the external thread is opposite to that of the outer peripheral surface of the external thread shown in FIG. 1 or FIG. The shape is not limited to a shape that is a continuous tapered surface connecting the outer peripheral surface end portion. For example, as an example,
The shape as shown in FIG. 3 may be sufficient. In FIG. 3A, since the outermost peripheral edge below the annular packing 144 protrudes downward, it is easy to come into close contact with the pipe wall around the hole formed in the pipe, and the water stopping effect is further enhanced. . In FIG. 3 (b), since the ridge is provided along the center line of the lower surface of the annular packing, when the lower surface of the annular packing hits the pipe wall around the through hole formed in the pipe,
The water stopping effect increases. Hereinafter, a process of piping a branch pipe for water distribution using the water diversion saddle joint 1 shown in FIG. 1 will be described with reference to FIG. First, in the first step, as shown in FIG. 4 (a), the water dividing saddle joint 1 is placed on a portion of the pipe 2 where water is to be divided so as to straddle the saddle portion 12, and To bring the inner surface of the saddle portion 12 into close contact with the outer surface of the pipe 2,
By energizing the heating wire 112 from a terminal (not shown), the inner surface of the saddle portion 12 and the outer surface of the pipe 2 are fused. The branch pipe 4 for water distribution is connected to the branch pipe connection part 13 by a joint. Next, in the second step, as shown in FIG. 4B, the screwing jig 3 is mounted on the upper end of the vertical cylindrical portion 12. The screwing jig 3 is a female screw 1 at the upper end of the vertical cylindrical portion 12.
The cap-shaped member 31 includes a cap-shaped member 31 screwed into the cap-shaped member 13 and a rotary rod 32 screwed into a screw hole provided in the center of the cap-shaped member 31. When the rotating rod 32 is rotated while the tip of the rotating rod 32 is inserted into the locking portion 144 on the upper end surface of the hole saw 14, the hole saw 14 is moved vertically.
Move down inside. Then, the blade portion 142 is rotatably applied to a portion of the pipe 2 where water is to be separated, and a through hole is formed. Thereafter, in the last step, the rotary saw 32 is rotated in the opposite direction to move the hole saw 14 upward in the vertical cylindrical portion 12 as shown in FIG. Thereby, the water in the pipe 2 can be connected to the water distribution branch pipe 4 via the branch pipe connection part 23, and the outer surface of the upper part of the hole saw 14 and the vertical cylindrical part 12 can be connected via the annular packing 15. The inside of the upper portion of the vertical cylindrical portion 12 can be closed by completely sealing between the upper inner surfaces. It is not necessary to cover the upper end of the vertical cylindrical portion 12 with a conventional cap for the purpose of water stoppage function. In order to repair or remove the branch pipe from such a state, as shown in FIG.
The screw jig 3 is attached to the upper end of the hole saw 14, and the rotary bar 32 is rotated in a state where the tip of the rotary bar 32 is inserted into the locking portion 144 on the upper end surface of the hole saw 14, so that the hole saw 14 is vertically. It is moved downward in the cylindrical portion 12. Then, the blade portion 142 of the hole saw is inserted into the through hole formed in the pipe 2 while rotating, and the annular rubber packing 14 is inserted.
4 is pressed between the edge of the through hole and the step 143 until it is compressed and deformed. Thereby, the flow of water from the pipe 2 to the branch pipe 4 is stopped. Finally, the cap-shaped member 31 is rotated in the opposite direction to remove the cap-shaped member 31 from the male screw 113 at the upper part of the vertical cylindrical portion 12, and the rotating rod 32 is removed from the locking portion 146 for the drilling jig. Thereby, water or the like does not come to the branch pipe side. Since the water diversion saddle joint of the present invention is constructed as described above, when repairing or removing the branch pipe, the branch pipe repair and removal work can be performed without stopping the flow of water through the pipe. Thus, a water diversion saddle joint that does not need to close the branch pipe with a cap or the like after the removal of the branch pipe is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an example of a water diversion saddle joint of the present invention. FIG. 2 is a cross-sectional view showing a state in which a hole saw is pushed into a pipe and an annular rubber packing is pressed against an outer surface of the pipe in the water dividing saddle joint of FIG. FIG. 3 is a sectional view showing another example of a hole saw used in the present invention. (A) It is a half sectional view of an example in which packing is used, in which a step is close to a right angle and an outer peripheral portion protrudes. (A) It is a half cross-sectional view of an example in which packing having a step close to a right angle and a ridge provided in the center is used. FIG. 4 is an explanatory view illustrating a process of piping a branch pipe for water diversion using the diversion saddle joint shown in FIG. 1; (A) It is sectional drawing explaining the first process. (B) It is sectional drawing explaining a 2nd process. (C) It is sectional drawing explaining the last process. FIG. 5 is an explanatory diagram for explaining a process of piping a branch pipe for water distribution using a conventional water diversion saddle joint. (A) It is sectional drawing explaining the first process. (B) It is sectional drawing explaining the last process. DESCRIPTION OF THE SYMBOLS 1 Water dividing saddle joint 11 Saddle part 12 Vertical cylinder part 13 Branch pipe connection part 14 Hole saw 15 of the present invention Ring packing 111 Opening 121 Female screw 141 Male screw 142 Blade part 143 Step 144 Ring rubber packing 145 Bottom part 146 Fixing part 2 Pipe 3 Screw jig 4 Branch pipe

Claims (1)

Claims: 1. A water diversion saddle joint comprising a vertical cylindrical portion having a non-penetrating hole saw mounted therein and having a branch pipe connection portion, and a saddle portion straddling the piping. The hole saw provided with a blade portion at the pipe side end, a male screw provided on the outer peripheral surface of the substantially central portion thereof is screwed into a female screw provided on the inner peripheral surface of the vertical cylindrical portion of the water distribution saddle joint, It is mounted in the vertical cylinder so that it can move up and down, the outer diameter of the male thread is larger than the outer diameter of the blade, and the step between the male thread and the blade is a step, and an annular rubber packing is provided around the entire step. A water diversion saddle joint characterized by being fitted.