JP7501916B2 - Retaining Rings for Pipe Fittings - Google Patents

Description

The present invention relates to a fixing ring for a pipe joint that is fixed to a structure.

Patent document 1 discloses a fixing structure for a pipe fitting that is fixed to a partition plate by partially penetrating a through hole formed in the partition plate that separates the compartments.

JP 2014-35051 A

The object of the present invention is to provide a new fixing ring for a pipe joint.

In order to achieve the above object, the fixing ring for a pipe joint according to claim 1 of the present invention is a fixing ring used to fix an elbow member of a pipe joint to a structure, and is flat and has a circular or polygonal outer shape, and has an internal thread formed on its inner circumferential surface to screw into the external thread of the elbow member, four screw holes are formed at 90° intervals in the circumferential direction, and two tool holes are formed at equal intervals in the circumferential direction at positions different from the screw holes, and a tool can be fitted into the tool holes to change the position of the screwing relative to the elbow member, and the screws for the fixing are screwed into the structure through the screw holes.

FIG. FIG. 4 is a front view showing the pipe joint fixed to the wall body. FIG. 4 is a partial cross-sectional side view showing the pipe joint fixed to the wall body. Cross-sectional view of line AA in Figure 3. FIG. 11 is a perspective view showing another example of a joint body and an intermediate ring.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
2 to 4, the pipe fitting 1 is attached to a wall 100 serving as a structure. A through hole 103 is formed in the wall 100 between a first surface 101 and a second surface 102. The pipe fitting 1 is inserted into the through hole 103 and supplies hot and cold water received on the first surface 101 side to the second surface 102 side.

Figure 1 is a perspective view of a pipe fitting 1 disassembled in a direction along the axis L. In Figure 1, the following are located on the first surface 101 side of the wall body 100, in order of furthest from the first surface 101: an elbow member 9 constituting the fitting body 2, a flange member 3 constituting the flange portion of the fitting body 2, an intermediate ring 4, and a water stop ring 5. In Figure 1, the following are located on the second surface 102 side of the wall body 100, in order of furthest from the second surface 102: a plurality of screws 8 (two in this embodiment) as pin-shaped fixing members, a fixing ring 7, a sliding ring 6, and a water stop ring 10.

As shown in Figures 1 and 3, the elbow member 9 is composed of a cylindrical portion 20 and a pipe connection portion 21 arranged in an L-shape. The cylindrical portion 20 and the pipe connection portion 21 are internally connected. A male thread portion 22 is formed on the outer peripheral surface of the cylindrical portion 20. A female thread portion 23 is formed on the inner peripheral surface of the cylindrical portion 20.

The pipe connection part 21 is a well-known one-touch joint. A pipe body P made of a synthetic resin such as cross-linked polyethylene or polybutene is connected to the pipe connection part 21. A piping member (not shown), such as a water faucet, is connected to the female threaded part 23 of the cylindrical part 20.

As shown in Figures 1, 2 and 4, a pair of flat surfaces 24 (first restricting portions) are formed on the male threaded portion 22. The pair of flat surfaces 24 are formed on opposite sides of the axis of the cylindrical portion 20 so as to be parallel to each other.

As shown in Figures 3 and 4, a flange member 3 is attached to the base end side of the cylindrical portion 20. A female thread portion 30 that screws into the male thread portion 22 is formed on the inner peripheral surface of the flange member 3. The flange member 3 is screwed up to the base end side of the cylindrical portion 20.

As shown in Figures 3 and 4, after the flange member 3 is screwed into the cylindrical portion 20, the intermediate ring 4 and the water stop ring 5 are inserted into the cylindrical portion 20.

As shown in Figures 1 and 4, the inner peripheral surface of the intermediate ring 4 is formed with an insertion hole 40 shaped to correspond to the cylindrical portion 20, and a pair of plate portions 41 (second restricting portions) shaped to correspond to the pair of flat portions 24 formed on the male threaded portion 22. In other words, when the cylindrical portion 20 is inserted through the insertion hole 40 and rotated in the circumferential direction, the flat portions 24 and the plate portions 41 come into contact with each other and rotate together.

The intermediate ring 4 is formed by pressing a stainless steel plate, a steel plate, or the like. After pressing it along the outer shape of the intermediate ring 4, the two flat protrusions formed on the inside are bent outward to form the plate portion 41.

As shown in FIG. 1, the water stop ring 5 is a flat ring-shaped packing made of soft synthetic resin, rubber, or the like. The water stop ring 5 has an insertion hole 50 through which the tubular portion 20 can be inserted.

As shown in Figures 3 and 4, the tubular portion 20 into which the flange member 3, the intermediate ring 4, and the water stop ring 5 are inserted is inserted into the through hole 103 from the first surface 101 side.

As shown in Figures 3 and 4, a water stop ring 10, a sliding ring 6, and a fixing ring 7 are attached in the same order to the tip of the cylindrical portion 20 protruding from the second surface 102.

As shown in FIG. 1, the water stop ring 10 is a flat ring-shaped packing, similar to the water stop ring 5. The water stop ring 10 has an insertion hole 11 through which the cylindrical portion 20 can be inserted.

As shown in Figures 3 and 4, the sliding ring 6 is a ring-shaped member for reducing the rotational friction resistance between the water stop ring 5 and the fixed ring 7. As shown in Figure 1, the sliding ring 6 is formed with an insertion hole 60 through which the cylindrical portion 20 can be inserted.

As shown in FIG. 1, the inner peripheral surface of the fixing ring 7 is formed with a female threaded portion 70 that screws into the male threaded portion 22 of the cylindrical portion 20. As shown in FIGS. 1 and 2, the fixing ring 7 is formed with a plurality of screw holes 71 (four in this embodiment) at equal intervals in the circumferential direction through which the screws 8 are inserted, and also has a plurality of tool holes 72 (two in this embodiment) at equal intervals in the circumferential direction through which a tool is inserted.

When screwing the fixing ring 7 into the male threaded portion 22 of the cylindrical portion 20, the wall body 100 can be tightly clamped between the fixing ring 7 and the flange member 3 by inserting a tool such as a water wrench into the tool hole 72 and rotating it.

If the tip of the tubular portion 20 protrudes too far beyond the fixing ring 7 when the fixing ring 7 is attached in this manner, adjust the amount that the flange member 3 is screwed into the tubular portion 20 to adjust the amount that the tubular portion 20 protrudes beyond the fixing ring 7.

As shown in Figures 2 to 4, two screws 8 are inserted into the screw holes 71 of the fixing ring 7 and screwed in using a tool such as an impact driver. The screws 8 are tapping screws with a drill, and can be screwed into the wall body 100 or the like without drilling pilot holes.

The screw 8 is inserted into the insertion hole 71 of the fixing ring 7, passes through the sliding ring 6 and the water stop ring 10, and is screwed into the wall body 100. The screw 8 passes through the wall body 100 and the water stop ring 5, reaches the intermediate ring 4, and then passes through the intermediate ring 4 and into the flange member 3.

The screw 8 prevents the fixing ring 7 and the wall body 100 from rotating relative to each other, and engages with the intermediate ring 4, preventing the intermediate ring 4 and the wall body 100 from rotating relative to each other.

As shown in FIG. 2, the screw 8 is screwed into one of the four screw holes 71 so as not to damage the elbow member 9. In other words, when screwing the fixing ring 7 into the cylindrical portion 20, the fixing ring 7 is adjusted so that the screw hole 71 is positioned so as to avoid the joint body 2.

Since the screw holes 71 are formed at four equally spaced locations on the circumference, the positions of the screw holes 71 can be adjusted at 90° intervals. Also, by using the flat surface 22 formed on the cylindrical portion 20 as a guide and positioning the screw holes 71 close to the flat surface 22, the position will not damage the elbow member 9.

Now, as shown in Figures 2 to 4, when the pipe fitting 1 is attached to the wall body 100 and a faucet or the like is screwed into the female threaded portion 23 of the fitting body 2, the fitting body 2 tries to rotate along with the faucet or the like. Then, the flat portion 24 formed on the fitting body 2 comes into contact with the plate portion 41 formed on the intermediate ring 4, and the intermediate ring 4 also tries to rotate along with it.

However, the intermediate ring 4 cannot rotate relative to the wall body 100 via the screws 8. In other words, even if the joint body 2 is not stopped from rotating with a tool or the like, the screws 8 for the fixing ring 7 are used to prevent the joint body 2 from rotating, and the faucet or the like can be easily screwed in. In this way, the use of the screws 8 for the fixing ring 7 can simplify the configuration.

Also, as shown in Figures 2, 3, and 4, in the pipe fitting 1, the outer diameter of the intermediate ring 4 is larger than the outer diameter of the fixed ring 7.

When screwing the screw 8 from the fixed ring 7 to the intermediate ring 4, the worker may be afraid of damaging the elbow member 9 and may screw it radially outward into the fixed ring 7. However, even if the screw 8 is tilted radially outward from the fixed ring 7, the screw 8 can still engage with the intermediate ring 4, making the screwing operation easier.

<Modification>
The above embodiment can be modified, for example, as follows.
5, in the joint body 2 of the pipe joint 1, the flat portion 24 formed on the male thread portion 22 of the elbow member 9 is removed, and a groove 200 (first restricting portion) having a V-shaped cross section is formed in the male thread portion 22. In addition, the plate portion 41 formed in the intermediate ring 4 is removed, and a protrusion 400 (second restricting portion) having a shape corresponding to the groove 200 is formed on the inner circumferential surface of the intermediate ring 4.

When a faucet or the like is screwed into the female threaded portion 23 of the elbow member 9, if the elbow member 9 attempts to rotate with the faucet, the groove 200 hits the protrusion 400, preventing the relative rotation and preventing the elbow member 9 from rotating with the faucet.

The shapes of the first and second restricting parts are not limited to this, and may be any shape that prevents the relative rotation by abutting against each other when the joint body tries to rotate together.

○ In the pipe fitting 1, the intermediate ring 4 is disposed between the second surface 102 and the fixed ring 7.

○The flange member 3 is integrally formed with the elbow member 9.

○The shape of the fitting body 2 can be, for example, an I-shaped nipple or a T-shaped tee.

○The outer shape of the intermediate ring 4 and the fixed ring 7 must be polygonal.

○The water stop ring 5 is arranged only on the first surface 101 side or only on the second surface 102 side of the wall body 100. Also, in applications and environments where there is no need to consider the inflow of liquids, etc., the water stop ring 5 may be omitted.

○ Form a threaded portion on the inner or outer peripheral surface of the pipe connection part 21 to connect a fitting, etc.

○Other fixing materials include tapping screws, nails, pins, etc.

○Other structures include floors and ceilings.

<Additional Notes>
The technical ideas that can be understood from the above embodiment will be described.
(1) A joint body having a cylindrical portion inserted into a through hole between a first surface and a second surface of a structure, a pipe connection portion disposed on the first surface side of the structure, communicating with the cylindrical portion and connected to a pipe body, and a flange portion provided on a base end side of the cylindrical portion, the cylindrical portion having a male thread portion formed on an outer peripheral surface thereof, a female thread portion formed on an inner peripheral surface thereof, and a first restricting portion formed on a part of the male thread portion, a fixing ring disposed on the second surface side of the structure, screwed onto the male thread portion of the cylindrical portion, and sandwiching the structure between the fixing ring and the flange portion, and a fixing member between the flange portion and the structure. a pipe fitting comprising: an intermediate ring that is arranged between the first surface or between the second surface of the structure and the fixing ring, and has an insertion hole corresponding to the cylindrical portion, with a second regulating portion formed on the inner surface of the insertion hole, the second regulating portion having a shape corresponding to the first regulating portion and regulating relative rotation with the cylindrical portion by abutting against the first regulating portion; and a pin-shaped fixing member that is passed from the fixing ring to the structure and prevents relative rotation between the fixing ring and the structure, wherein the fixing member reaches the intermediate ring and engages with the intermediate ring, preventing relative rotation between the intermediate ring and the structure.

(2) A pipe fitting according to the technical idea (1) in which the outer diameter of the intermediate ring is greater than the outer diameter of the fixed ring.

2...Joint body, 3...Flange member, 4...Intermediate ring, 7...Fixing ring, 8...Screw, 9...Elbow member, 20...Cylindrical portion, 24...Flat portion, 41...Plate portion.

Claims (1)

A fixing ring for a pipe fitting used to fix an elbow member of a pipe fitting to a structure, the fixing ring is flat and has a circular or polygonal outer shape, the inner peripheral surface is formed with a female thread that screws into the male thread of the elbow member, four screw holes are formed at 90° intervals in the circumferential direction, and two tool holes are formed at equal intervals in the circumferential direction at positions different from the screw holes, the position of the screwing relative to the elbow member can be changed by fitting a tool into the tool holes, and the fixing screws are screwed into the structure through the screw holes.

Images