JP2014196759A - Branch saddle joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an appropriate thread fastening of a cap to be performed since a cutoff state of an upper end opening of a main body of a branch part can easily be acknowledged.SOLUTION: An outer surface upper part of a main body 18 of a branch saddle joint 10 is formed with a thread part 22 and a cap 28 is installed at the thread part 22. In addition, the outer surface of the main body 18 of the branch is provided with a base part 50 protruded outside and the lower part of the cap 28 is formed with an indicator part 60. The indicator part 60 is pressed by the base part 50 and deformed when the cap 28 reaches to a prescribed thread fastened state and it is protruded outside than the outer surface of the cap 28.

Description

  The present invention relates to a branch saddle joint, and more particularly, to a branch saddle joint that is electrically fusion bonded to an outer surface of a main pipe in order to connect the branch pipe to a main pipe made of synthetic resin.

  Conventionally, when tap water is drawn into the house from a water main made of synthetic resin, as a method for taking out a branch without stopping the water passing through the water main already in use (that is, branching without water) A method using a branch saddle joint such as an EF saddle joint is known.

For example, a branch saddle joint (resin service team) disclosed in Patent Document 1 is a saddle portion fused to the outer surface of a water main, a branch portion main body protruding from the saddle portion, and a side protruding from the branch portion main body. And a perforated part is mounted in the main part of the branch part. When removing the branch pipe from the water main, the heating wire embedded in the saddle is energized and the inner surface of the saddle is fused to the outer surface of the water main, and then the perforated parts are used to connect the water main. Drill a branch hole. Then, when the perforation of the branch hole is finished, the perforated part is pulled up above the branch pipe connection part, and a closing cap is attached to the upper end opening of the branch part body, and flows into the branch part body from the water main side. Water is prevented from leaking from the upper end opening of the branch body.
JP-A-5-177597 [B26F 1/00]

  In the branch saddle joint of Patent Document 1, the closing cap is attached to the upper end opening of the branch portion main body to stop the water, but the closing cap is not properly screwed to the male screw portion of the branch portion main body. In addition, the gap between the closing cap and the branch portion main body cannot be reliably sealed by the rubber ring, and water leakage occurs from the upper end opening of the branch portion main body.

  However, at the construction site, the current situation is that there is no choice but to work on an ambiguous standard such as “tighten by hand until the closure cap does not rotate.” Depending on the worker and the work conditions, the closure cap may be appropriate. The screw was not tightened. In particular, in the case of uninterrupted water branching, since the force to lift the closure cap with internal water pressure after the main pipe is drilled, a stronger force is required to screw the closure cap, and the closure cap It is very difficult to determine whether it is properly screwed. Therefore, there was anxiety about working on a standard depending on the worker.

  Therefore, the main object of the present invention is to provide a novel branch saddle joint.

  Another object of the present invention is to provide a bifurcated saddle joint capable of appropriately screwing a cap.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses, supplementary explanations, and the like indicate correspondence relationships with embodiments described later to help understanding of the present invention, and do not limit the present invention in any way.

  A first aspect of the present invention is a branch saddle joint that is electrofused and joined to the outer surface of a main pipe in order to take out a branch from a main pipe made of synthetic resin, and includes a saddle portion in which a branch hole is formed, and a peripheral portion of the branch hole A short tubular branch body rising from the branch body, a branch pipe connecting portion protruding laterally from the branch body, a screw portion formed on the outer surface of the branch portion main body above the branch pipe connecting portion, and screwed into the screw portion, This is a branch saddle joint comprising a cap that stops the upper end opening of the branch portion body when the screw tightening state is reached, and a display means that indicates that the cap has reached a predetermined screw tightening state.

  In the first invention, the branch saddle joint (10) includes a saddle portion (12) that is electrically fused to the outer surface of the main pipe (100). A short tubular branch body (18) that rises radially outward of the saddle section is formed at the peripheral edge of the branch hole (14) in the saddle section, and the branch pipe (102) is connected from the outer surface of the branch body. The branch pipe connection part (20) for doing this protrudes to the side. Further, a screw portion (22) is formed on the outer surface upper portion of the branch portion main body, and a cap (28) is attached to the screw portion. The cap is screwed into the threaded portion and stops the upper end opening (26) of the branch body when reaching a predetermined screw tightened state. Further, the branch body or cap is provided with display means (56, 58, 60, 62) for indicating that the cap has reached a predetermined screwed state. Then, when performing the screw tightening operation of the cap, this display means indicates to the operator or the like that the cap has reached the predetermined screw tightening state.

  According to the first aspect of the present invention, it can be easily confirmed that the cap has reached the predetermined screw tightened state and the upper end opening of the branch portion main body has been stopped. Compared with the case of tightening, the cap can be screwed appropriately.

  The second invention is a branch saddle joint that is electrofused and joined to the outer surface of the main pipe in order to take out the branch from the main pipe made of synthetic resin, and includes a saddle portion in which a branch hole is formed, and a peripheral portion of the branch hole A short tubular branch body rising from the branch body, a branch pipe connecting part protruding laterally from the branch body, a screw part formed on the outer surface of the branch body above the branch pipe connecting part, or integral with or separate from the branch body When the screw reaches the predetermined screw tightening state, it is screwed into the base and screw that are formed outside the outer surface of the branch body within the height range from the branch pipe connection to the screw. One or a plurality of caps that are formed on at least one of the cap and the cap and the base portion, and deform when the cap reaches a predetermined screw tightening state and exhibit a predetermined behavior Inn It comprises a applicator section, the branch saddle joint.

  In the second invention, the branch saddle joint (10) includes a saddle portion (12) that is electrically fused to the outer surface of the main pipe (100). A short tubular branch body (18) that rises radially outward of the saddle section is formed at the peripheral edge of the branch hole (14) in the saddle section, and the branch pipe (102) is connected from the outer surface of the branch body. The branch pipe connection part (20) for doing this protrudes to the side. Further, a screw portion (22) is formed on the outer surface upper portion of the branch portion main body, and a cap (28) is attached to the screw portion. The cap is screwed into the threaded portion and stops the upper end opening (26) of the branch body when reaching a predetermined screw tightened state. Furthermore, the base part (40, 50) which protrudes outside the outer surface of a branch part main body is provided in the branch part main body within the height range from a branch pipe connection part to a screw part. For example, a protrusion (40) formed integrally with the branch portion main body, a ring member (50) provided separately from the branch portion main body, or the like is used for the base portion. Furthermore, the branch body or base is provided with indicator portions (56, 58, 60, 62) that are deformed when the cap reaches a predetermined screwed state and exhibit a predetermined behavior. Then, when performing the screw tightening operation of the cap, the behavior of the indicator portion indicates to the operator or the like that the cap has reached a predetermined screw tightening state.

  According to the 2nd invention, there exists an effect similar to the 1st invention.

  A third invention is dependent on the second invention, and when the cap reaches a predetermined screw tightened state, the indicator portion protrudes outward from the outer surface of the cap.

  In the third invention, the indicator portion (60, 62) is made deformable to the outside by being pressed from the inside, for example. When the cap (28) reaches a predetermined screw tightening state, the indicator portion is deformed and protrudes outside the outer surface of the side wall (30) of the cap.

  According to the third invention, even if the working condition is visible only from above, it is possible to indicate to the operator or the like that the cap has reached the predetermined screw tightening state. Work can be done without much influence.

  The fourth invention is dependent on the second invention, and the indicator portion is broken when the cap reaches a predetermined screw tightened state.

  In the fourth aspect of the invention, the indicator part (60, 62) is deformed and bent outwardly, for example, by being pressed from the inside thereof, and is separated from, for example, the cap (28) or the base part (40, 50). Is done.

  According to the fourth aspect, the same effect as the third aspect is achieved.

  A fifth invention is a branch saddle joint that is electrofused and joined to the outer surface of a main pipe in order to take out a branch from a main pipe made of synthetic resin, and includes a saddle portion in which a branch hole is formed, and a peripheral portion of the branch hole A short tubular branch body rising from the branch body, a branch pipe connecting portion protruding laterally from the branch body, a first threaded portion formed on the outer surface of the branch body above the branch pipe connecting portion, and external to the branch body A second threaded portion is formed on the inner surface of the second threaded portion, and the third threaded portion is formed on the outer surface of the second threaded portion. A base portion protruding outward from the outer surface of the member, a cap screwed into the third screw portion, and a cap that stops water at the upper end opening of the branch portion main body when reaching a predetermined screw tightened state, and at least one of the cap and the base portion Formed on one side and the cap is screwed in place Comprising display means for indicating that you have reached the state, a branch saddle joint.

  In the fifth invention, the branch saddle joint (10) includes a saddle portion (12) that is electrically fused to the outer surface of the main pipe (100). A short tubular branch body (18) that rises radially outward of the saddle section is formed at the peripheral edge of the branch hole (14) in the saddle section, and the branch pipe (102) is connected from the outer surface of the branch body. The branch pipe connection part (20) for doing this protrudes to the side. Moreover, the thread part (22) is formed in the outer surface upper part of a branch part main body, and an external fitting member (64) is mounted | worn with this thread part. Furthermore, a screw part (72) is formed on the outer surface of the outer fitting member, and a cap (28) is attached to the screw part. The cap is screwed into the threaded portion and stops the upper end opening (26) of the branch body when reaching a predetermined screw tightened state. Further, for example, a base portion (74) protruding outward from the outer surface of the outer fitting member is formed at the lower portion of the outer surface of the outer fitting member. Furthermore, the cap or base portion is provided with display means (56, 58, 60, 62) for indicating that the cap has reached a predetermined screwed state. Then, when performing the screw tightening operation of the cap, this display means indicates to the operator or the like that the cap has reached the predetermined screw tightening state.

  According to the fifth aspect, the same effect as the first aspect is achieved.

  Furthermore, if the outer fitting member is formed of a material having a smaller friction coefficient than that of the branch portion main body, it is possible to reduce the rotational torque required when the cap is screwed.

  According to the present invention, when performing the screw tightening operation of the cap, it is possible to easily confirm that the cap has reached the predetermined screw tightening state. It becomes possible to reliably ensure the water-stopping property of the upper end opening.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is an illustration figure which shows a mode that the branch saddle joint of one Example of this invention was attached to the main pipe. It is a top view which shows the branch saddle joint of FIG. It is a front view which shows the branch saddle joint of FIG. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed in the branch saddle joint of FIG. 1, (a) shows a mode that the cap was mounted | worn with the branch part main body, (b) is a state with a predetermined screw tightening of a cap Shows the state reached. It is an illustration figure which shows a mode that the screwing operation | work of a cap is performed in the branch saddle joint of other one Example of this invention, and shows a mode that the cap reached the predetermined screwing state. It is an illustration figure which shows a mode that the branch saddle joint of another one Example of this invention was attached to the main pipe. It is a perspective view which shows the ring member of FIG. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed in the branch saddle joint of FIG. 6, (a) shows a mode that the ring member was mounted | worn to the branch part main body, (b) is a cap on a branch part main body. (C) shows a state in which the cap has reached a predetermined screw-tightened state. It is an illustration figure which shows a mode that the branch saddle joint of another one Example of this invention was attached to the main pipe. FIG. 10 is a plan view showing the cap of FIG. 9. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed in the branch saddle joint of FIG. 9, (a) shows a mode that the cap was mounted | worn with the branch part main body, (b) is a cap screw-tightened to predetermined | prescribed screw Shows the state reached. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed in the branch saddle joint of FIG. 9, (a) shows a mode that the cap was mounted | worn with the branch part main body, (b) is a cap screw-tightened to predetermined | prescribed screw Shows the state reached. It is an illustration figure which shows a mode that the screwing operation | work of a cap is performed in the branch saddle joint of further another Example of this invention, and shows a mode that the cap reached the predetermined screwing state. It is a perspective view which shows the ring member of FIG. It is an illustration figure which shows a mode that the branch saddle joint of another one Example of this invention was attached to the main pipe. It is a top view which shows the cap of FIG. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed in the branch saddle joint of FIG. 15, (a) shows a mode that the cap was mounted | worn with the branch part main body, (b) is a state with a predetermined screw tightening of a cap Shows the state reached. FIG. 16 is a top view showing a state where the cap has reached a predetermined screw tightened state in the branch saddle joint of FIG. 15. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed in the branch saddle joint of further another Example of this invention, (a) shows a mode that the cap was mounted | worn with the branch part main body, (b) FIG. 3 shows a state where the cap has reached a predetermined screw tightening state. It is an illustration figure which shows a mode that the branch saddle joint of another one Example of this invention was attached to the main pipe. It is a perspective view which shows the external fitting member of FIG. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed in the branch saddle joint of FIG. 20, (a) shows a mode that the outer fitting member was mounted | worn with the branch part main body, (b) is attached to an outer fitting member. A state where the cap is attached is shown, and (c) shows a state where the cap has reached a predetermined screw tightening state. It is a perspective view which shows a cap mounting jig. It is an illustration figure which shows a mode that the screw fastening operation | work of a cap is performed using the cap mounting jig | tool of FIG. It is a perspective view which shows an auxiliary jig. It is an illustration figure which shows a mode that the cap screwing operation | work is performed using the cap mounting jig | tool of FIG. It is a perspective view which shows the deformation | transformation Example of an auxiliary jig. It is an illustration figure which shows a mode that the cap screwing operation | work is performed using the cap mounting jig | tool of FIG. It is a top view which shows the branch saddle joint of other one Example of this invention.

  Referring to FIG. 1, a branch saddle joint 10 according to an embodiment of the present invention includes a main pipe 100 when a branch pipe 102 is taken out from a main pipe 100 formed of a heat-sealable synthetic resin such as polyethylene. This is an EF (electrofusion) saddle joint that is electrically fused to the outer surface, and includes a saddle portion 12 that is curved and formed along the outer surface of the main pipe 100.

  In addition, although the main pipe 100 may be a water pipe, a gas pipe, a sewer pipe, etc., the Example of a water distribution pipe is shown here. The pipe diameter of the main pipe 100 is, for example, 100 mm.

  Referring to FIGS. 2 and 3 together with FIG. 1, the saddle portion 12 is formed of the same type of heat-sealable synthetic resin as the main pipe 100. In this embodiment, polyethylene is used as the material of the saddle portion 12. The The saddle portion 12 is a semi-cylindrical plate-like body having an inner diameter curvature that is the same as the outer diameter curvature of the main pipe 100, and a branch hole 14 having a substantially circular shape in plan view is formed at the center thereof. As an example, the length of the saddle portion 12 in the axial direction (the pipe axis direction of the main pipe 100) is, for example, 160 mm, and the thickness thereof is, for example, 10 mm.

  On the back surface side of the saddle portion 12, that is, on the joint surface side with the main pipe 100, a heating wire 16 arranged in an arbitrary shape such as a spiral shape or a twisted shape around the branch hole 14 is provided. Both ends of the heating wire 16 are connected to a power connection terminal (not shown) formed so as to protrude from the surface of the saddle portion 12. The power connection terminal is connected to an energization controller to supply current to the heating wire 16. By flowing, the joint surface between the saddle portion 12 and the main pipe 100 is melted.

  Further, a short tubular branch body 18 that rises toward the radially outer side of the saddle portion 12 (that is, the upper side in FIG. 1) is integrally formed at the peripheral edge of the branch hole 14. The diameter of the branch part main body 18 is, for example, 55 mm. A short tubular branch pipe connecting portion 20 projecting sideways is integrally formed on the outer surface of the branch portion main body 18, and the aforementioned branch pipe 102 is connected to the branch pipe connecting portion 20 via a joint or the like. .

  A male screw portion 22 is formed on the outer surface of the branch portion main body 18, and a rubber ring 24 is mounted above the male screw portion 22. A cap 28 that closes the upper end opening 26 of the branch portion main body 18 is attached to the upper end portion of the branch portion main body 18.

  The cap 28 is formed in a cylindrical shape with a top and has a side wall 30 and a top surface 32. A female screw portion 34 that is screwed into the male screw portion 22 of the branching portion main body 18 is formed at a lower portion of the inner surface of the side wall 30 of the cap 28. In addition, a female screw part 34 and a non-screw part 36 that continues vertically are formed on the inner surface of the side wall 30. The non-threaded portion 36 is a so-called straight portion that is not threaded, and is formed so as to protrude inward from the female threaded portion 34. As will be described in detail later, the cap 28 attached to the branch portion main body 18 has a predetermined shape. When the screw tightening state is reached, it is pressed against the rubber ring 24 of the branch portion main body 18. That is, when the cap 28 reaches a predetermined screw tightening state, the gap between the cap 28 and the branch portion main body 18 is sealed through the rubber ring 24, thereby the upper end opening 26 of the branch portion main body 18. Water stoppage is ensured. Furthermore, a plurality of ribs 38 extending in the vertical direction are formed on the outer surface of the side wall 30 of the cap 28 with a predetermined interval in the circumferential direction. The length of the side wall 30 of the cap 28 in the vertical direction is, for example, 45 mm, and the outer diameter thereof is, for example, 75 mm.

  Furthermore, a protruding portion 40 is integrally formed on a part of the outer surface of the branch portion main body 18 in the circumferential direction. The protruding portion 40 is provided so as to protrude from the outer surface of the branch portion main body 18 to the outside (outside in the radial direction) within a height range from the branch pipe connecting portion 20 to the lower end of the male screw portion 22, and has a substantially rectangular parallelepiped shape. Have.

  The projecting portion 40 functions as a base portion that serves as an index (reference) indicating the screw tightened state of the cap 28 together with the lower end of the cap 28 when performing the screw tightening operation of the cap 28. As will be described in detail later, the cap 40 The fact that 28 has reached a predetermined screwed state is indicated by the positional relationship between the upper end (upper surface) of the protrusion 40 and the lower end of the cap 28 (lower surface of the side wall 30).

  That is, in this embodiment, since the protrusion 40 is formed integrally with the top of the branch pipe connecting portion 20, the height position of the upper end of the protrusion 40 depends on the vertical length of the protrusion 40. Determined. Then, by determining the vertical length of the projecting portion 40 based on a predetermined condition, the cap 28 screwed into the male screw portion 22 of the branch body 18 reaches a predetermined screw tightened state. The lower end of 28 is in contact with the upper end of the protrusion 40. For example, in this embodiment, the length of the protrusion 40 in the vertical direction is set to 22 mm-24 mm.

  Moreover, the protrusion part 40 is formed so that it may protrude outside the outer surface of the side wall 30 of the cap 28 mentioned above, and the length (namely, protrusion length) of the horizontal direction is 12 mm-15 mm, for example.

  Furthermore, an internal thread portion 42 is formed on the inner surface of the branch portion main body 18 over the entire surface. And inside the branch part main body 18, the piercing | punching component 44 is provided through the internal thread part 42 so that a movement in the axial direction (axial direction of the branch part main body 18) is possible.

  In addition, since the structure of the punching part 44 is known, detailed description is abbreviate | omitted here. Briefly, the perforated component 44 includes a metal cutter body 46 and a synthetic resin screw body 48, and the cutter body 46 and the screw body 48 are integrated by insert molding or the like. The cutter body 46 is formed in a cylindrical shape by a metal such as stainless steel (for example, SUS304), and the lower end portion thereof is formed in a shape that is sharpened downward. The upper part of the cutter body 46 is embedded in the wall of the screw body 48. The screw body 48 is formed in a cylindrical shape from a synthetic resin such as polyacetal (POM), and a thread portion formed on the inner surface of the branch portion body 18 of the branch saddle joint 10 is formed on the outer surface thereof. A rotating tool engaging portion (not shown) such as a hexagonal hole that engages with the rotating tool is formed at the upper end of the screw body 48.

  Hereinafter, a method for taking out a branch from the main pipe 100 using such a branch saddle joint 10 will be described with reference to FIG. 4 together with FIG.

  When taking out the branch from the main pipe 100, first, the branch saddle joint 10 is placed at a desired position of the main pipe 100, and the outer surface of the main pipe 100 and the saddle portion are used by using a fixture (not shown) such as a clamp. 12 It fixes so that inner surface may contact | adhere. Then, the heating wire 16 embedded in the saddle portion 12 is energized to generate heat, and the outer surface of the main pipe 100 and the inner surface of the saddle portion 12 are fusion bonded. Further, the branch pipe 102 is connected to the branch pipe connecting portion 20.

  Next, the end of the rotary tool (not shown) is inserted into the rotary tool engaging portion of the drilling component 44, and the screw body 48 is rotated by the rotary tool, whereby the drilling component 44 is screwed downward. The main body 100 is perforated by the cutter body 46. After the cutter body 46 reaches the inner surface of the main pipe 100, the perforated component 44 is screwed upward by rotating the screw body 48 reversely with a rotating tool.

  Thereafter, when the perforated component 44 is moved to the uppermost part of the branch body 18, the inside of the main pipe 100 and the inside of the branch pipe 102 communicate with each other through the branch hole 14, the branch body 18 and the branch pipe connection portion 20. Since the fluid flowing in the pipe 100 is supplied into the branch pipe 102, the cap 28 is finally attached to the upper end of the branch body 20 and the cap 28 is screwed.

  When performing the screw tightening operation of the cap 28, as shown in FIG. 4A, the internal thread portion 34 at the lower inner surface of the side wall 30 of the cap 28 is screwed to the external thread portion 22 at the upper outer surface of the branch body 18, and The cap 28 is screwed downward while confirming the distance between the lower end of the cap 28 and the upper end of the protrusion 40 by, for example, visual observation or touching with a fingertip.

  Then, when the cap 28 is lowered until the lower end of the cap 28 comes into contact with the upper end of the projecting portion 40 and the cap 28 reaches a predetermined screw tightening state, as shown in FIG. Since the gap with the main body 18 is sealed through the rubber ring 24 and the water stoppage of the upper end opening 26 of the branching body 18 is secured, the screw tightening operation of the cap 28 is finished.

  As described above, in this embodiment, when the screw tightening operation of the cap 28 is performed, the fact that the cap 28 has reached a predetermined screw tightening state is that the lower end of the cap 28 and the upper end of the protruding portion (base portion) 40 are It is indicated by the positional relationship.

  That is, when the cap 28 is screwed, the height of the lower end of the cap 28 is determined based on the height position of the upper end of the protruding portion (base portion) 40 that protrudes outward from the outer surface of the branch portion body 18. By performing the screw tightening operation of the cap 28 while confirming the position, it is possible to easily confirm that the water-stopping property of the upper end opening 26 of the branch body 18 is secured.

  Therefore, according to this embodiment, the screw of the cap 28 can be appropriately tightened, and compared with the case where the cap is tightened with an ambiguous reference as in the above-mentioned patent document, the branch body 18 Water leakage from the upper end opening 26 can be reliably prevented.

  In the above-described embodiment, when the cap 28 reaches a predetermined screw tightening state, the lower end of the cap 28 and the upper end of the protruding portion 40 are in contact with each other. However, the present invention is not limited to this.

  As long as the cap 28 has reached the predetermined screw tightening state, it can be shown in association with the lower end of the cap 28 and the height position of the protruding portion (base portion) 40, as shown in FIG. When the cap 28 reaches a predetermined screw tightening state, the lower end of the cap 28 and the upper end of the protruding portion 40 may be in a positional relationship with a predetermined interval L therebetween.

  For example, in this embodiment, the distance L between the lower end of the cap 28 and the upper end of the protrusion 40 when the cap 28 reaches a predetermined screw tightening state is set to 5 mm-10 mm. Is large enough to insert a fingertip. In this case, the operator performs the screw tightening of the cap 28 while confirming the distance between the lower end of the cap 28 and the upper end of the protrusion 40 by, for example, visual observation or touching with a fingertip. The cap 28 is lowered until the upper end of the portion 40 is in a positional relationship with an interval L therebetween.

  Also in this embodiment, by performing the screw tightening operation of the cap 28 while confirming the height position of the lower end of the cap 28 on the basis of the height position of the upper end of the protruding portion (base portion) 40, the cap 28 is predetermined. It can be easily confirmed that the screw tightening state has been reached, that is, that the water stoppage of the upper end opening 26 of the branch body 18 has been secured.

  Further, in this embodiment, even after the cap 28 reaches a predetermined screw tightening state, the cap 28 can be further screw tightened (retightening is performed). If tightening is performed until it comes into contact with the upper end, backlash (dimensional tolerance) can be absorbed in the tightened distance. Therefore, it becomes possible to ensure water-stopping without being affected by dimensional tolerances, and the branched saddle joint 10 can be manufactured without requiring strict dimensional accuracy.

  In the above-described embodiment, the protruding portion (base portion) 40 protrudes outward from a part of the outer surface of the branching portion main body 18 in the circumferential direction. However, the present invention is not limited to this. You may make it form the protrusion part 40 of the shape which protrudes outside on the outer surface of the branch part main body 18 over the perimeter.

  Furthermore, it is not always necessary to form the base part integrally with the outer surface of the branch part main body 18 and the top of the branch pipe connection part 20.

  In the branch saddle joint 10 according to another embodiment of the present invention shown in FIG. 6, a ring member 50 provided separately from the branch portion main body 18 is used as a base portion. Hereinafter, the same reference numerals are used for the same parts as those in the embodiment of FIG. 1, and the description thereof is omitted or simplified.

  Referring to FIG. 7 together with FIG. 6, the ring member 50 is made of a metal such as iron or SUS or a synthetic resin such as polyethylene, and is formed in a donut ring shape having an opening 52 in the center. The inner diameter of the ring member 50 (that is, the diameter of the opening 52) is set slightly larger than the outer diameter of the branch body 18 and is, for example, 58 mm. Moreover, the outer diameter of the ring member 50 is set larger than the outer diameter of the cap 28, and is 100 mm, for example.

  The ring member 50 is fitted on the outer surface of the branch body 18 and the lower end of the ring member 50 is locked to the top (upper end) of the branch pipe connection portion 20, so that the ring member 50 extends from the branch pipe connection portion 20 to the lower end of the male screw portion 22. In the height range, the branch portion body 18 is provided so as to protrude outward from the outer surface. Accordingly, the ring member 50 functions as a base portion serving as an index indicating the screw tightening state of the cap 28 together with the lower end of the cap 28 when performing the screw tightening operation of the cap 28, similarly to the protrusion 40 described above. The fact that 28 has reached a predetermined screw tightening state is indicated by the positional relationship between the upper end (upper surface) of the ring member 50 and the lower end of the cap 28.

  That is, in this embodiment, the lower end of the ring member 50 is locked to the top of the branch pipe connecting portion 20 and is held at the same height as the top of the branch pipe connecting portion 20. The height position of the upper end of the ring is determined by the vertical length of the ring member 50. And when the length of the ring member 50 in the vertical direction is determined based on a predetermined condition, the cap 28 screwed into the male screw portion 22 of the branch body 18 reaches a predetermined screw tightened state. The lower end of the cap 28 is in contact with the upper end of the ring member 50. For example, in this embodiment, the length of the ring member 50 in the vertical direction is set to 22 mm-24 mm.

  When a branch is taken out from the main pipe 100 using such a branch saddle joint 10, first, the inner surface of the saddle portion 12 of the branch saddle joint 10 and the outer surface of the main pipe 100 are fusion-bonded in the same manner as described above. At the same time, the main pipe 100 is pierced so that the main pipe 100 and the branch pipe 102 communicate with each other.

  Next, as shown in FIG. 8A, by inserting the branch body 18 into the opening 52 of the ring member 50, the ring member 50 is fitted on the branch body 18, and the ring member 50 is connected to the branch pipe. The connection portion 20 is locked to the top of the tube and held at the height position.

  Then, as shown in FIG. 8B, the cap 28 is attached to the upper end portion of the branch body 20 and the cap 28 is screwed. That is, the internal thread portion 34 at the lower inner surface of the side wall 30 of the cap 28 is screwed into the external thread portion 22 at the upper outer surface of the branch body 18, and the distance between the lower end of the cap 28 and the upper end of the protruding portion 40 is visually or fingertips, for example. The cap 28 is screwed downward while confirming by touching with the button. Then, when the cap 28 is lowered until the lower end of the cap 28 comes into contact with the upper end of the ring member 50 and the cap 28 reaches a predetermined screw tightening state, as shown in FIG. Since the gap with the main body 18 is sealed through the rubber ring 24 and the water stoppage of the upper end opening 26 of the branching body 18 is secured, the screw tightening operation of the cap 28 is finished.

  In this embodiment, similarly to the embodiment of FIG. 1, the height of the lower end of the cap 28 is determined with reference to the height position of the upper end of the ring member (base portion) 50 when performing the screw tightening operation of the cap 28. By performing the screw tightening operation of the cap 28 while confirming the position, it is possible to easily confirm that the water stoppage of the upper end opening 26 of the branch body 18 is secured.

  In addition, since the ring member 50 provided separately from the branch part body 18 is used as the base part, it is not necessary to form the branch part body 18 into a special shape. That is, it is not necessary to manufacture a new molding die for molding the branch portion main body 18, and a conventional molding die can be used. Therefore, the manufacturing cost can be reduced accordingly.

  Furthermore, the branch saddle joint 10 can be selectively used according to the working conditions, for example, when the branch saddle joint 10 is used only when the water is branched without water.

  In this embodiment as well, when the cap 28 reaches a predetermined screw tightening state, the lower end of the cap 28 and the upper end of the ring member 50 may be in a positional relationship with a predetermined interval. Needless to say.

  Further, in the branch saddle joint 10 of another embodiment of the present invention shown in FIG. 9, a notch portion 54 is formed in the cap 28. Hereinafter, the same reference numerals are used for the same parts as those in the embodiment of FIG. 6, and the description thereof is omitted or simplified.

  Referring to FIG. 10 together with FIG. 9, a cutout portion 54 is formed in a part of the cap 50 in the circumferential direction. The notch 54 has a shape in which the lower end of the cap 50 is cut into a rectangle so as to extend upward from the lower end of the cap 28, and the vertical size thereof is, for example, 15 mm. The size is, for example, 10 mm.

  Although not shown, the male threaded portion 22 of the branch body 18 has a predetermined height range associated with the height position when the cap 28 reaches a predetermined screw tightening state. It is colored in different colors so that it can be easily discriminated by visual inspection.

  Further, the length of the ring member 50 in the vertical direction (that is, the height position of the upper end of the ring member 50) is such that the lower end of the cap 28 and the upper end of the ring member 50 when the cap 28 reaches a predetermined screw tightening state. Are determined based on a predetermined condition so as to be in a positional relationship with a predetermined interval L therebetween. For example, in this embodiment, the height of the ring member 50 is set to 15 mm-20 mm, and the interval L is set to 5 mm-10 mm.

  In such a branch saddle joint 10, as shown in FIGS. 11 (a) and 11 (b), when the cap 28 is attached to the upper end portion of the branch portion body 18, the outer surface of the branch portion body 18 via the notch portion 54. The upper male screw portion 22 is exposed to the outside. For this reason, the number of screw tightening times (until the cap 28 reaches a predetermined screw tightening state) by visually observing the male screw portion 22 through the notch 54 and comparing it with the colored region of the male screw portion 22 ( It is possible to grasp the number of remaining screws). However, the remaining number of screw tightening times may be grasped by touching with a fingertip.

  Then, when performing the screw tightening operation of the cap 28, the operator or the like confirms the distance between the lower end of the cap 28 and the upper end of the ring member 50 by, for example, visually or touching with a fingertip, and through the notch 54. The cap 28 is tightened using the grasped number of remaining screw tightening as a guideline, and the lower end of the cap 28 and the upper end of the ring member 50 are spaced from each other as shown in FIGS. 12 (a) and 12 (b). The cap 28 is lowered until the relationship is established.

  As described above, according to this embodiment, since the screw tightening operation of the cap 28 can be performed with the remaining number of screw tightening as a guide, the screw tightening of the cap 28 can be performed more appropriately.

  Also in this embodiment, instead of using the ring member 50 externally fitted to the branch part body 18 as a base part, a protrusion formed integrally with the outer surface of the branch part body 18 and the top of the branch pipe connection part 20. Needless to say, the portion 40 may be used as the base portion.

  And in all the subsequent examples, it replaces with the ring member 50 fitted on the branch part main body 18, and the protrusion part formed integrally with the outer surface of the branch part main body 18 and the pipe top of the branch pipe connection part 20 40 may be used as the base portion.

  Further, instead of forming the notch portion 54 in the cap 28, a light transmissive material (transparent resin) such as polycarbonate, acrylic or transparent vinyl chloride may be adopted as the material of the cap 28. As in the example, since the screwing operation of the cap 28 can be performed based on the remaining number of screw tightening times, the cap 28 can be tightened more appropriately.

  Furthermore, in the above-described embodiment, the cap 28 has reached the predetermined screw tightening state by the positional relationship between the lower end of the cap 28 and the upper ends of the base portions 40, 50. Alternatively, it may be shown to the worker or the like by other means.

  For example, in the branched saddle joint 10 according to another embodiment of the present invention shown in FIG. 13, the first protrusion 56 is formed at the lower end of the cap 28 and the second protrusion 58 is formed at the upper end of the ring member 50. And make them interfere with each other.

  Referring to FIG. 13 and FIG. 14, a plurality of first protrusions 56 that are arranged at regular intervals in the circumferential direction are integrally formed at the lower end of the side wall 30 of the cap 28. The first protrusion 56 protrudes downward from the lower surface of the cap 28. The first protrusion 56 has a conical or quadrangular pyramid shape that is sharpened downward, and its tip angle is, for example, 30-60 °.

  In addition, a plurality of second protrusions 58 arranged in a radial pattern are integrally formed on the upper surface of the ring member 50. The second protrusion 58 is a protrusion that extends linearly from the opening 52 to the outer edge of the ring member 50, and protrudes upward from the upper surface of the ring member 50. The second protrusion 58 has, for example, a triangular shape in cross section, and the tip angle thereof is, for example, 60 °.

  Further, the length of the ring member 50 in the vertical direction (that is, the height position of the upper end of the ring member 50) is such that the lower end of the cap 28, that is, the first protrusion 56 when the cap 28 reaches a predetermined screw tightened state. The lower end of the ring member 50 is in contact with the upper end of the ring member 50, that is, the upper end of the second protrusion 58. For example, in this embodiment, the vertical length of the first protrusion 56 is set to 5 mm, and the vertical length of the second protrusion 58 is set to 2 mm.

  In such a branched saddle joint 10, when the cap 28 reaches a predetermined screw tightening state, the lower end of the first protrusion 56 of the cap 28 is the upper end of the second protrusion 58 of the ring member 50 as shown in FIG. 13. To touch. At this time, the lower end of the first protrusion 56 of the cap 28 is sharpened (that is, the thickness of the contact portion of the ring member 50 with the second protrusion 58 is reduced), whereby the first protrusion The rotation of the cap 28 is not locked by the contact between the lower end of 56 and the upper end of the second protrusion 58. That is, when the lower end of the first protrusion 56 of the cap 28 comes into contact with the upper end of the second protrusion 58, the lower end of the first protrusion 56 is elastically deformed. The cap 28 can be further screwed while colliding with the upper ends of the second protrusions 58 arranged side by side.

  When the cap 28 is further screwed, the lower end of the first protrusion 56 of the cap 28 is elastically deformed when it collides with the upper end of each second protrusion 58, and the upper end of each second protrusion 58 is overcome. Occasional restoration (attempting restoration to the original shape) causes a feeling of moderation (a feeling of clicking) such as fine vibrations in accordance with the rotation of the cap 28, or a collision sound such as “katakata”. Therefore, the operator can know that the cap 28 has reached a predetermined screw tightening state by such notification signals such as moderation feeling and collision sound.

  As described above, in this embodiment, the cap 28 has reached the predetermined screw tightening state as indicated by (or instead of) the positional relationship between the lower end of the cap 28 and the upper end of the ring member 50. The lower end of the first protrusion 56 is notified by a notification signal such as a moderation feeling or a collision sound generated by deformation due to a collision with the upper end of the second protrusion 58.

  Therefore, by performing the screw tightening operation of the cap 28 until a notification signal such as a sense of moderation or sound is notified, the cap 28 can be tightened more appropriately.

  Further, for example, even in a dark working condition that cannot be visually observed, the operator can know that the cap 28 has reached a predetermined screw tightening state using a notification signal such as a sense of moderation or sound. Therefore, the work can be performed without being influenced by the working conditions.

  In this embodiment, the lower end of the first projecting portion 56 of the cap 28 is elastically deformed by contact with the upper end of the second projecting portion 58. However, the present invention is not limited to this. The upper end may be sharpened so that the upper end of the second protrusion 58 is elastically deformed by contact with the lower end of the first protrusion 56 of the cap 28, or the lower end of the first protrusion 56 and the second protrusion The upper ends of the portions 58 may be sharpened together, and they may be elastically deformed together by mutual contact.

  Further, the means for notifying (explicitly indicating) that the cap 28 has reached the predetermined screw tightening state does not necessarily need to be a notification signal such as a sense of moderation or sound. Instead of this, it may be explicitly shown to the worker or the like by other means.

  For example, although illustration is omitted, one of the first protrusion 56 and the second protrusion 58 is formed of a softer material than the other, and the cap 28 is further screwed after they come into contact with each other. You may make it bite into the other. In this case as well, the cap 28 can not be screwed by checking the shape change caused by one biting into the other by visual observation or touching with the fingertip or by the anchor effect due to biting. It is possible to know that 28 has reached a predetermined screw tightening state.

  Further, for example, in the branch saddle joint 10 of another embodiment of the present invention shown in FIG. 15, when the cap 28 reaches a predetermined screw tightening state, the indicator portion 60 protruding outward from the outer surface of the cap 28 is provided. The cap 28 is formed.

  Referring to FIG. 16 together with FIG. 15, a plurality of (four in this embodiment) indicator portions 60 are formed on the lower side of the cap 28 at regular intervals in the circumferential direction. The indicator portion 60 is configured to be deformable to the outer surface side (the outer edge side of the cap 28) by being pressed from the inner surface side (center side of the cap 28). For example, in this embodiment, the indicator portion 60 is deformed. Is formed in a semi-elliptical plate shape that is inclined slightly outward from the lower surface of the side surface 30 of the cap 28 and protrudes downward. Then, the fact that the cap 28 has reached a predetermined screwed state is indicated by the indicator portion 60 being deformed outward (falling down).

  Moreover, the indicator part 60 is set to the magnitude | size which protrudes outside from the outer surface of the side wall 30 when it deform | transforms outward, The length of the up-down direction is 10 mm, for example.

  Further, the length of the ring member 50 in the vertical direction (that is, the height position of the upper end of the ring member 50) is determined so that the indicator portion 60 of the cap 28 has the ring member 50 when the cap 28 reaches a predetermined screw tightening state. It is determined based on a predetermined condition so that the indicator portion 62 that is in contact with the ring member and receives the reaction force from the ring member 50 is deformed outward. For example, in this embodiment, the length of the ring member 50 in the vertical direction is set to 20 mm-25 mm.

  In such a branched saddle joint 10, when the screw tightening operation of the cap 28 is performed, as shown in FIG. When further screw tightening is performed, an outward pressing force acts on the indicator portion 60 by the reaction force from the ring member 50.

  When the cap 28 reaches a predetermined screw tightening state, as shown in FIG. 17B, the indicator portion 60 is deformed so as to fall outward by the pressing force received from the ring member 50, and the indicator portion 60 protrudes outward from the outer surface of the cap 28, so that the operator confirms that the indicator portion 60 protrudes outward from the outer surface of the cap 28 by visual observation or touching with a fingertip. It is possible to know that the screw tightening state has been reached.

  Thus, in this embodiment, when the screwing operation of the cap 28 is performed, the indicator portion 60 is deformed and protrudes outward from the outer surface of the cap 28, so that the cap 28 reaches a predetermined screwing state. This clearly indicates that it is possible to screw the cap 28 more appropriately.

  Further, even if the working conditions are visible only from above, for example, as shown in FIG. 18, the operator uses the indicator portion 60 protruding outward from the outer surface of the cap 28 as an index, and the cap 28 is fixed to a predetermined screw. Since it is possible to know that the tightening state has been reached, the work can be performed without much influence on the work conditions.

  In this embodiment, the indicator part 60 is formed on the lower side of the cap 28. However, the present invention is not limited to this, and the number and shape of the indicator parts, the installation positions, etc. may be changed as appropriate. .

  For example, in the branch saddle joint 10 according to another embodiment of the present invention shown in FIG. 19, when the cap 28 reaches a predetermined screw tightening state, the indicator portion 62 protruding outward from the outer surface of the cap 28 is provided as a ring member. 50 is formed on the upper side.

  As shown in FIG. 19, the ring member 50 is made of a material that is approximately the same as or softer than the cap 28 of the branch saddle joint 10 and is formed in a donut ring shape. The outer diameter of the ring member 50 is set to be equal to or slightly smaller than the outer diameter of the cap 28, and is, for example, 70 mm.

  An indicator portion 62 protruding upward is formed on the upper surface of the ring member 50. The indicator portion 62 is configured to be deformable to the outer surface side (the outer edge side of the ring member 50) by receiving a pressing force from the inner surface side (center side of the ring member 50). For example, in this embodiment, The indicator portion 62 is formed in a ring shape over the entire circumference in the circumferential direction, rises so that the outer side surface 62a is continuous from the outer surface of the ring member 50, and the inner side surface 62b faces outward from the upper surface of the ring member 50. It has a triangular cross-section that rises at an incline. Then, the fact that the cap 28 has reached a predetermined screwed state is indicated by the indicator portion 60 being deformed outward (falling down).

  Moreover, the indicator part 62 is set to the magnitude | size which protrudes outside from the outer surface of the side wall 30 of the cap 28 when it deform | transforms outward, The length of the up-down direction is 5 mm, for example.

  Further, the vertical length of the ring member 50 (that is, the height position of the upper end of the ring member 50) is such that the lower end of the cap 28 contacts the indicator portion 62 when the cap 28 reaches a predetermined screwed state. In addition, it is determined based on predetermined conditions so that the indicator portion 62 that receives the propulsive force of the cap 28 is deformed outward. For example, in this embodiment, the length of the ring member 50 in the vertical direction is set to 20 mm-25 mm.

  In such a branched saddle joint 10, when performing the screw tightening operation of the cap 28, as shown in FIG. 19A, the lower end of the side wall 30 of the cap 28 and the upper end of the ring member 50, that is, the upper end of the indicator portion 62 When the screw is further tightened after the contact, the outward pressing force acts on the inner side surface 62b of the indicator portion 62 by the propulsive force by which the cap 28 is screwed downward.

  Then, when the cap 28 reaches a predetermined screw tightening state, as shown in FIG. 19B, the indicator portion 62 is deformed so as to fall outward by the pressing force received from the ring member 50, and the indicator portion 62 protrudes outward from the outer surface of the side wall 30 of the cap 28, so that the operator confirms that the indicator portion 62 protrudes outward from the outer surface of the side wall 30 of the cap 28 by visual observation or touching with a fingertip. By this, it can be known that the cap 28 has reached a predetermined screw tightening state.

  Thus, also in this embodiment, as in the embodiment of FIG. 15, the indicator portion 62 is deformed and protrudes outward from the outer surface of the cap 28, so that the cap 28 reaches a predetermined screw tightened state. This clearly indicates that the cap 28 can be screwed more appropriately, and the work can be performed without much influence on the working conditions.

  In the embodiment of FIG. 13, the first projection 56 and the second projection 58 of the cap 28 function as an indicator unit, and one of them is deformed and cooperated with the other, so that a sense of moderation, sound, etc. A notification signal was generated. 15 and 18, the indicator portions 60 and 62 are deformed so as to protrude outward from the outer surface of the side wall 30 of the cap 28. However, the behavior of the indicator portion when the cap 28 reaches a predetermined screwed state need not be limited to this.

  For example, when the cap 28 reaches a predetermined screw tightened state, the deformed indicator portion may be bent outward. At this time, the indicator portion may be separated from the cap 28 or the ring member (base portion) 50 by being folded.

  Further, for example, the indicator part formed on the cap 28 and the indicator part formed on the base part may be deformed, and they may interfere with each other to exhibit a predetermined behavior.

  In short, the indicator portion is deformed when the cap 28 reaches a predetermined screw tightening state and exhibits a predetermined behavior, thereby notifying an operator or the like that the cap 28 has reached the predetermined screw tightening state ( Anything that can be explicitly indicated) may be used.

  In each of the above-described embodiments, the cap 28 is directly attached to the upper end portion of the branching portion main body 18, but it is not necessary to be limited to this.

  In the branch saddle joint 10 of another embodiment of the present invention shown in FIG. 20, a cap 28 is attached to the upper end portion of the branch portion main body 18 via an outer fitting member 64.

  Referring to FIG. 21 together with FIG. 20, the external fitting member 64 includes a main body 66 made of a metal such as iron or SUS, a synthetic resin such as polyethylene, and the like, and having a cylindrical shape with an opening 68 formed in the center. An internal thread portion 70 is formed on the inner surface of the main body 66 over the entire length thereof, and the internal thread portion 70 is screwed with an external thread portion 22 formed on the upper outer surface of the branch body 18. The inner diameter of the main body 66 is set to be equal to the outer diameter of the branch body 18 and is, for example, 55 mm.

  A male screw portion 72 is formed on the outer surface upper portion of the main body 66, and the male screw portion 72 is screwed with a female screw portion 34 formed on the inner surface lower portion of the side wall 30 of the cap 28. Then, when the cap 28 reaches a predetermined screw tightened state, the non-threaded portion 36 of the cap 28 is pressed against the rubber ring 24 of the branch portion main body 18. That is, in this embodiment, when the cap 28 screwed to the external threaded portion 72 on the outer surface of the outer fitting member 64 reaches a predetermined screw tightening state, the gap between the cap 28 and the branch body 18 is set to the rubber ring 24. Thus, the water-tightness of the upper end opening 26 of the branch body 18 is secured.

  Further, a projecting portion 74 protruding from the outer surface of the main body 66 is formed integrally with the lower portion of the outer surface of the main body 66 over the entire circumference. The outer diameter of the protrusion 74 is set to be larger than the outer diameter of the side wall 30 of the cap 28 and is, for example, 80 mm. The protruding portion 74 functions as a base portion serving as a reference indicating the screw tightening state of the cap 28 together with the lower end of the cap 28 when the screw tightening operation of the cap 28 is performed, and protrudes outward from the outer surface of the main body 66. Formed. Then, the fact that the cap 28 has reached a predetermined screwed state is indicated by the positional relationship between the upper surface (upper end) of the projecting portion 74 and the lower end of the cap 28.

  That is, in this embodiment, the height position at which the outer fitting member 64 is screwed to the male threaded portion 22 of the branch body 18 and the vertical length of the protruding portion 74 (that is, the height position of the protruding portion 74). By determining based on a predetermined condition, when the cap 28 screwed into the external threaded portion 72 on the outer surface of the outer fitting member 64 reaches a predetermined screw tightened state, the lower end of the cap 28 becomes the upper end of the protruding portion 74. To be in contact. For example, in this embodiment, the outer fitting member 64 is fixed at a height position of 20 mm from the branch pipe connecting portion 20, and the vertical length of the protruding portion 74 is set to 3 mm-7 mm.

  When a branch is taken out from the main pipe 100 using such a branch saddle joint 10, first, the inner surface of the saddle portion 12 of the branch saddle joint 10 and the outer surface of the main pipe 100 are fusion-bonded in the same manner as described above. At the same time, the main pipe 100 is pierced so that the main pipe 100 and the branch pipe 102 communicate with each other.

  Then, as shown in FIG. 22A, the outer fitting member 64 is attached to the upper end portion of the branch portion main body 18. That is, the branch portion main body 18 is inserted into the opening 68 and the external thread member 70 is screwed into the male screw portion 22 of the branch portion main body 18 to fix the outer fitting member 64 at a predetermined position on the upper end portion of the branch portion main body 18. To do.

  Subsequently, as shown in FIG. 22B, the female screw portion 34 of the cap 28 is screwed into the male screw portion 72 of the outer fitting member 64, and the lower end of the cap 28 and the upper end of the protruding portion 74 of the outer fitting member 64 are connected. The screw tightening operation of the cap 28 is performed while confirming the interval by visual observation or touching with a fingertip.

  Then, the cap 28 is lowered until the lower end of the cap 28 comes into contact with the upper end of the protruding portion 74 of the outer fitting member 64. When the cap 28 reaches a predetermined screw tightening state, as shown in FIG. The gap between the main body 28 and the branch portion main body 18 is sealed via the rubber ring 24, and the water tightness of the upper end opening 26 of the branch portion main body 18 is ensured. Therefore, the screw tightening operation of the cap 28 is finished.

  Also in this embodiment, the height position of the lower end of the cap 28 is confirmed on the basis of the height position of the upper end of the protruding portion 74 of the external fitting member 64 that protrudes outward from the outer surface of the branch body 18. However, by performing the screw tightening operation of the cap 28, it is possible to easily confirm that the cap 28 has reached the predetermined screw tightening state. Therefore, as in the embodiment of FIG. Can be done.

  Further, according to this embodiment, since the cap 28 is mounted via the external fitting member 64 formed as a separate member from the branching portion main body 18, the outer fitting member 64 is different from the branching portion main body 18. It can be formed of a material. Therefore, for example, if the outer fitting member 64 is formed of a metal having a smaller friction coefficient rather than a synthetic resin such as polyethylene, a force (rotational torque) required for screwing the cap 28 is reduced. Therefore, workability can be improved accordingly.

  In this embodiment as well, the height of the protrusion 74 is not necessarily set so that the lower end of the cap 28 comes into contact with the upper end of the protrusion 74 of the outer fitting member 64 when the cap 28 reaches a predetermined screwed state. There is no need to define, and when the cap 28 reaches a predetermined screw tightening state, the lower end of the cap 28 and the upper end of the protruding portion 74 of the outer fitting member 64 may be in a positional relationship with a predetermined interval. Needless to say.

  Further, in this embodiment, instead of forming the protrusion 74 on the main body 66 of the outer fitting member 64, a locking portion is formed at the lower outer surface of the main body 66, and the ring member is locked to the locking portion. It may be. In this case, the ring member locked to the locking portion functions as a base portion serving as a reference indicating the screw tightened state of the cap 28 together with the lower end of the cap 28.

  Furthermore, an indicator part is formed on the lower side of the side surface 30 of the cap 28 and on the upper side of the protruding part 74 (or the ring member locked to the locking part) of the external fitting member 64, and the indicator part is deformed depending on the behavior at the time of deformation. The operator may be notified that the cap 28 has reached a predetermined screw tightening state.

  Furthermore, in each of the above-described embodiments, it is assumed that when the cap 28 is attached to the branch portion main body 18 (or the external fitting member 64), the screw tightening operation of the cap 28 is performed manually by an operator or the like. Although described, a screw tightening operation using a dedicated cap mounting jig 76 as shown in FIG. 23 may be performed.

  Referring to FIG. 24 together with FIG. 23, the cap mounting jig 76 is made of a metal such as iron or SUS, and includes a mounting portion 78 and two gripping portions 80. The mounting portion 78 is formed in a donut plate shape having an inner diameter matching the maximum outer diameter of the cap 28 (that is, the outer diameter of the rib 38), and has a claw portion 78a at a predetermined interval in the circumferential direction on the inner edge thereof. ing. When the cap 28 is screwed (rotated) using the cap attachment jig 76, the rotational force of the cap attachment jig 76 is increased by engaging the rib 38 of the cap 28 with the claw portion 78a. To act on.

  In addition, two gripping portions 80 are provided outside the mounting portion 78 so as to face each other with the mounting portion 78 interposed therebetween. The grip portion 80 is formed in a cylindrical shape extending in the radial direction of the mounting portion 78, and is fixed to the outer edge of the mounting portion 78 by an appropriate method such as welding.

  Further, a locking portion 82 is provided above the mounting portion 78. The locking portion 82 is formed in a substantially U-shaped plate shape that opens downward, and is fixed to the upper surface of the mounting portion 78 by an appropriate method such as welding. When the cap 28 is screwed using the cap mounting jig 76, the top plate 32 of the cap 28 is held so that the mounting portion 78 mounted on the cap 28 can be held within the height range of the side wall 30 of the cap 28. The locking portion 82 is locked.

  When screwing the cap 28 using such a cap mounting jig 76, the cap mounting jig 76 is first mounted on the cap 28. That is, the mounting portion 78 is fitted on the side wall 30 of the cap 28 so that the claw portion 78 a is inserted between the adjacent ribs 38 of the cap 28, and the locking portion 82 is placed on the top plate 32 of the cap 28. Place.

  Next, the screwing operation of the cap 28 is performed. That is, the gripping portion 80 is gripped with both hands, and the cap mounting jig 76 is rotated. Then, the rotational force applied to the cap mounting jig 78 acts on the cap 28, and the cap 28 is screwed into the male screw portion 22 of the branch portion main body 18 (or the male screw portion 72 of the external fitting member 64), and the downward direction. Screw on.

  In this way, the work of attaching the cap 28 can be performed more easily. In particular, when performing an uninterrupted water branch, for example, a stronger rotational force is required for screwing the cap 28, so if the cap 28 is screwed using the cap mounting jig 76, Workability is improved.

  Further, in each of the above-described embodiments, the base portions 40, 50, and 74 that protrude from the outer surface of the branch portion main body are used as a reference for indicating the screw tightened state of the cap 28. However, the present invention is not limited to this. There is no need to The side wall 30 of the cap 28 is extended downward, and the top (upper end) of the branch pipe connecting portion 20 is used as a reference to indicate the screwed state of the cap 28 together with the lower end of the cap 28. Good.

  Further, it is not always necessary to use the height position of the lower end of the cap 28 as a reference indicating the screw tightened state of the cap 28, and another part of the cap 28 may be used as a reference.

  In addition, when confirming that the cap 28 has reached a predetermined screw tightening state using the height positions of the lower end of the cap 28 and the upper end of the branch pipe connecting portion 20 as an index, the lower end of the cap 28 and the branch pipe connecting portion 20 In order to determine the exact distance from the top of the tube, an auxiliary jig 84 as shown in FIG.

  Referring to FIG. 26 together with FIG. 25, the auxiliary jig 84 includes a main body 86 formed in a rectangular plate shape, and is formed in a semicircular shape along the outer shape of the branch pipe connecting portion 20 at the lower portion of the main body 86. A cutout portion 88 is formed, and the auxiliary jig 84 is fixedly arranged with respect to the branch saddle joint 10 by bringing the branch pipe connection portion 20 along the cutout portion 88. In this embodiment, the vertical length of the main body 86 of the auxiliary jig 84 is such that the lower end of the cap 28 comes into contact with the upper end (upper surface) of the main body 86 when the cap 28 reaches a predetermined screw tightening state. As such, it is set to a predetermined value. The height of the main body 86 is, for example, 22 mm-24 mm.

  When screwing the cap 28 using such an auxiliary jig 84, the auxiliary jig 84 is mounted on the branch pipe connection part 20 with the branch pipe connection part 20 along the notch 88. The main body 86 is disposed between the branch pipe connecting portion 20 and the cap 28, and the gap between the lower end of the cap 28 and the upper end of the branch pipe connecting portion 20 is checked using the auxiliary jig 84, 28 screws are tightened. Then, as shown in FIG. 26, the cap 28 is lowered until the lower end of the cap 28 comes into contact with the upper end (upper surface) of the main body 86.

  The auxiliary jig does not necessarily have to have its main body disposed between the branch pipe connecting portion 20 and the cap 28, but is disposed on the top surface 32 of the cap 28 as shown in FIG. It may be.

  Referring to FIG. 28 together with FIG. 27, the auxiliary jig 90 has a substantially L-shape as a whole, and includes a first main body 92 having a quadrangular prism shape extending in the vertical direction. At the lower end portion of the first main body 92, a notch portion 94 that is curved so as to follow the outer shape of the branch pipe connecting portion 20 is formed. In addition, a second main body 96 extending at a right angle from the first main body 92 is provided at the upper end portion of the first main body 92. The auxiliary jig 90 is fixedly arranged with respect to the branch saddle joint 10 by placing the second main body 96 on the top surface 32 of the cap 28. In this embodiment, the vertical length of the first main body 92 is a predetermined value so that the branch pipe connecting portion 20 is fitted into the notch portion 94 when the cap 28 reaches a predetermined screw tightened state. It is stipulated in. The length of the first main body 92 in the vertical direction is, for example, 65 mm.

  When screwing the cap 28 using such an auxiliary jig 90, the second main body 96 of the auxiliary jig 90 is placed on the top surface 32 of the cap 28 and the first main body 92. Is placed above the branch pipe connecting portion 20, and the cap 28 is screwed while confirming the distance between the lower end of the cap 28 and the upper end of the branch pipe connecting portion 20 using the auxiliary jig 90. And as shown in FIG. 28, the cap 28 is lowered | hung until the notch part 94 and the branch pipe connection part 20 of the 1st main body 92 contact.

  As described above, when the screw tightening operation is performed using the auxiliary jig 84 of FIG. 25 or the auxiliary jig 90 of FIG. 27, the operator or the like uses the auxiliary jig 84 as an index, and the cap 28 descends downward. By performing the screw tightening operation of the cap 28 while confirming the height position of the lower end of the arm, it is possible to confirm that the water stoppage of the upper end opening 26 of the branch body 18 is secured.

  That is, similarly to the above-described embodiment, the cap 28 can be appropriately tightened as compared with the case where the cap is tightened with an ambiguous reference at the discretion of the operator or the like.

  Furthermore, since such auxiliary jigs 84 and 90 can be used in combination with a conventional branch saddle joint, there is no extra cost, and since it can be used any number of times, it is economical. Excellent.

  Furthermore, in each of the above-described embodiments, the fact that the cap 28 has reached a predetermined screwed state is indicated in association with the height position of the lower end of the cap 28, and the indicator portions 56, 58, 60, 62 are displayed. Although indicated by behavior, in addition to them, a display unit 98 indicating the rotation direction when the cap 28 reaches a predetermined screwed state may be provided.

  As shown in FIG. 29, the display unit 98 indicates the rotation direction of the cap 28. For example, the display unit 98 rotates when the cap 28 reaches a predetermined screwed state by matching the direction of the branch pipe connecting unit 20 or the like. Used as a direction indicator. The display unit 98 is displayed with a paint at a position that is easily visible from the outside, such as the top surface 32 of the cap 28. However, the display may be performed by directly engraving on the top surface 32 of the cap 28, pasting a piece of paper or the like on the top surface 32 of the cap 28, combining them, or the like.

  In this case, it is possible to perform the screw tightening operation of the cap 28 using the rotational direction as a guide while confirming the rotational direction of the cap 28 by matching the directions of the display unit 98 and the branch pipe connecting unit 20. Therefore, the cap 28 can be screwed more appropriately.

  Although not shown in the drawings, the display unit 98 does not necessarily indicate the rotation direction when the cap 28 reaches a predetermined screw-tight state in a pinpoint (single point). May indicate a rotation range in which is secured.

  Furthermore, in each of the above-described embodiments, the main pipe 100 and the branch saddle joint 10 are made of polyethylene. However, the present invention is not limited to this, and the main pipe 100 and the branch saddle joint 10 are made of polypropylene or the like. You may form with another synthetic resin. In short, the main pipe 100 and the branch saddle joint 10 may be made of the same synthetic resin.

  In addition, the specific numerical values such as the dimensions given above are merely examples, and can be appropriately changed according to necessity such as product specifications.

DESCRIPTION OF SYMBOLS 10 ... Branch saddle joint 12 ... Saddle part 14 ... Branch hole 18 ... Branch part main body 20 ... Branch pipe connection part 22 ... Male thread part (screw part)
28 ... Cap 34 ... Female thread (thread)
40, 50, 74 ... base part 56, 58, 60, 62 ... indicator part 64 ... external fitting member 100 ... main pipe 102 ... branch pipe

Claims (5)

A branch saddle joint that is electrofused to the outer surface of the main pipe to take out a branch from the main pipe made of synthetic resin,
Saddle part with branch holes formed,
A short tubular branch body rising from the peripheral edge of the branch hole;
A branch pipe connecting part protruding laterally from the branch part body;
A threaded portion formed on the outer surface of the branch portion body above the branch pipe connection portion;
A cap that is screwed into the threaded portion to stop the upper end opening of the branch portion main body when reaching a predetermined screw tightening state, and a display means that indicates that the cap has reached the predetermined screw tightening state A branch saddle joint. A branch saddle joint that is electrofused to the outer surface of the main pipe to take out a branch from the main pipe made of synthetic resin,
Saddle part with branch holes formed,
A short tubular branch body rising from the peripheral edge of the branch hole;
A branch pipe connecting part protruding laterally from the branch part body;
A threaded portion formed on the outer surface of the branch portion body above the branch pipe connection portion;
A base portion that is formed integrally or separately with the branch portion main body, and that protrudes outside the outer surface of the branch portion main body within a height range from the branch pipe connecting portion to the screw portion;
A cap that is screwed into the threaded portion to stop water at an upper end opening of the branch portion main body when a predetermined screw tightening state is reached, and is formed on at least one of the cap and the base portion; A bifurcated saddle joint comprising one or a plurality of indicator parts which are deformed and exhibit a predetermined behavior when the screw tightening state is reached.   The branch saddle joint according to claim 2, wherein the indicator portion projects outward from an outer surface of the cap when the cap reaches the predetermined screw tightening state.   The branch saddle joint according to claim 2 or 3, wherein the indicator portion is broken when the cap reaches the predetermined screw tightening state. A branch saddle joint that is electrofused to the outer surface of the main pipe to take out a branch from the main pipe made of synthetic resin,
Saddle part with branch holes formed,
A short tubular branch body rising from the peripheral edge of the branch hole;
A branch pipe connecting part protruding laterally from the branch part body;
A first threaded portion formed on the outer surface of the branch portion body above the branch pipe connection portion;
An outer fitting member that is externally fitted to the branch portion main body, has a second screw portion that is screwed to the first screw portion on an inner surface thereof, and a third screw portion is formed on an outer surface thereof;
A base portion protruding outward from the outer surface of the outer fitting member below the third screw portion;
A cap that is screwed into the third threaded portion and that stops the upper end opening of the branch body when reaching a predetermined screw tightening state, and is formed on at least one of the cap and the base portion, A branch saddle joint comprising display means for indicating that the cap has reached the predetermined screw tightening state.

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