JP3084197U - Hot water supply piping unit - Google Patents

Abstract

(57) [Problem] To provide a hot water supply piping unit which can eliminate the labor and skill required for cutting a long pipe on site and shorten the construction period. A telescopic tube (1) comprising an inner tube (11) and an outer tube (21).
And a metal ring body 3 externally fitted to the inner tube 11, a first tightening member 4 externally fitted to the inner tube 11, and a second tightening member 5 externally fitted to the outer tube 21. When the first and second tightening members 4 and 5 are screwed and tightened, the ring body 3 is reduced in diameter to hold the inner tube 11 and at the same time the ring body 3 is tightened.
Is fixed in the axial direction, and the length of the telescopic tube 1 is fixed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a hot water supply piping unit.

[0002]

[Prior art]

 Pipes of a predetermined length and fittings such as elbows and cheeses are used as appropriate for piping of hot water supply equipment. Conventionally, pipes of the required length have been obtained by cutting long pipes while adjusting the dimensions at the construction site when piping such hot water supply facilities.

[0003]

[Problems to be solved by the invention]

 However, there are many pipes for connecting to hot water supply equipment, especially hot water supply boilers, and it is troublesome to adopt a means of cutting each long pipe as in the conventional method. Not only did they require skill, but they often failed to adequately respond to requests to shorten the construction period.

[0004] The present invention has been made under the above circumstances, and by eliminating the need for labor and skill such as on-site cutting of a long pipe by unitizing pipes used for hot water supply equipment. It is an object of the present invention to provide a hot water supply piping unit that can meet the demand for shortening the construction period.

[0005]

[Means for Solving the Problems]

 The hot water supply piping unit according to the present invention includes a telescopic tube having an inner tube and an outer tube fitted slidably relative to each other in an axial direction, and a metal or rubber member fitted slidably to the inner tube. A first tightening member having a threaded portion slidably fitted to the inner tube, and a first tightening member slidably fitted to the outer tube to be fitted to the threaded portion of the first tightening member. A second fastening member having a screw portion that can be screwed. Then, when the screw portions of the first and second tightening members are screwed into each other and tightened, the ring body is pressed in the axial direction to reduce the diameter, thereby holding the inner tube. And a ring body fixing mechanism for preventing axial movement of the ring body with respect to the outer pipe when the ring body holds the inner pipe by the action of the ring body tightening mechanism.

According to this invention, when the thread portions of the first and second tightening members are loose, the inner tube and the outer tube are relatively slid to extend the telescopic tube to a desired length. When the screws are tightened after such length adjustment, the inner pipe and the outer pipe are slided by the cooperative action of the ring body tightening mechanism and the ring body fixing mechanism. The length of the telescopic tube is fixed. Therefore, it is possible to omit the trouble of cutting a long pipe to a desired length at a construction site, and furthermore, it is not necessary for an operator to be skilled in cutting the pipe. This will help shorten the construction period.

[0007] The ring body tightening mechanism is provided on a second tightening member, the expanding piece having an annular shape formed at the end of the outer tube and having an inner surface formed on a tapered pressing surface. A pressing portion for engaging with the expanding piece and pressing the expanding piece, a tapered pressing surface formed in an annular shape at the tip of the first fastening member, and the ring body; When the screw portions of the first and second tightening members are screwed into each other and tightened, it is preferable that the pressing surface of the expanding piece portion and the pressing surface of the first tightening member be formed by an inclined surface that presses against the pressing portion. By doing so, the ring body fixing mechanism is formed by the pressing surface of the expanding piece portion pressing against the inclined surface of the ring body and the pressing surface of the first tightening member. Become. Therefore, it is not necessary to form the ring body tightening mechanism and the ring body fixing mechanism with separate elements, and accordingly, the configurations of the ring body tightening mechanism and the ring body fixing mechanism are simplified, and the cost is reduced.

In the present invention, at least one of the inner tube and the outer tube is formed as a bendable flexible portion in the axial direction, and the remaining portion of the tube is a non-bendable non-bendable tube. Desirably, it is formed as a flexible portion. In this case, joints connectable to the connection ports of the mating pipes are provided at both ends of the telescopic tube, respectively, and the flexible portion is provided at least at a position near the joint on one side. It is desirable. According to this, the workability is improved especially when the hot water supply piping unit is connected to the hot water supply boiler. That is, in the boiler for hot water supply, it may be required to bend the end of the pipe provided along the body part outside the body part and connect it to a connection port provided at the top of the boiler, In such a case, the telescopic tube of the hot water supply piping unit is provided outside the body of the boiler, and the flexible part of the telescopic tube is bent, and a joint at the end is provided at the top of the boiler. This makes it possible to connect easily and quickly to the connection port that has been used.

[0009]

[Embodiment of the invention]

 FIG. 1 is a partially cutaway side view showing a hot water supply piping unit according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view showing a main part of FIG. 3 is a partially omitted side view of the inner tube 11, and FIG. 4 is a partially side view of the outer tube. FIG. 5 is a partially cutaway front view of the ring body 3.

The hot water supply piping unit has a telescopic tube 1 having a telescopic function, and a metal ring 3, a first tightening member 4, and a second tightening member 5 are attached to the telescopic tube 1. And a ring body fastening mechanism and a ring body fixing mechanism.

The telescopic tube 1 is formed by fitting a fixed length inner tube 11 and a fixed length outer tube 21 in a sliding manner in the axial direction, and when the two tubes 11 and 21 are slid. In this configuration, the outer peripheral surface of the inner tube 11 and the outer peripheral surface of the outer tube 21 slide with almost no play. A cylindrical first tightening member 4 having a screw portion 41 made of a male screw is externally fitted to the inner tube 11. The first tightening member 4 has a tapered pressing surface 43 that expands at the front end and an engagement portion 42 of a tightening tool (not shown) at the rear end. Further, the metal ring 3 having the property of being reduced in diameter within a certain range by being pressed inward in the radial direction is slidably fitted to the inner tube 11 in a state where there is almost no play. Have been combined. The ring body 3 is formed in an annular shape as shown in FIG. 5, and its outer peripheral surface is formed in a spherical surface.

On the other hand, the outer tube 21 is provided with a large-diameter portion 22 having a certain length, and the sliding range of the inner tube 11 is regulated by a stepped portion 23 formed at the inner end of the large-diameter portion 22. It is as follows. A second tightening member 5 formed of a cap nut is slidably fitted to the outer tube 21 and a flared portion 24 formed at the end of the tube by a diameter expanding process. The expanding piece portion 24 has an inner surface formed as a tapered pressing surface 25 having a tapered shape. The screw portion 51 of the second tightening member 5, which is a female screw, and the screw portion 41 of the first tightening piece portion 4. When the is tightened by screwing, the pressing portion 52 formed by the edge of the hole of the second tightening member 5 engages with the expanding piece 24 to press the expanding piece 24. .

Here, the above-mentioned ring body tightening mechanism is formed on the expanding piece 24 on the outer tube 21 side, the pressing portion 52 provided on the second tightening member 5, and the first tightening member 4. It is formed by the pressing surface 43 and the inclined surface 31 formed by the spherical outer peripheral surface of the ring body 3. Further, the above-described ring body fixing mechanism is configured such that the pressing surface 25 of the expanding piece portion 24 pressed against the inclined surface 31 of the ring body 3 and the pressing surface 43 of the first tightening member 4 pressed against the inclined surface 31 of the ring body 3. It is formed by.

In the above-described telescopic tube 1, when the screw portions 41, 51 of the first and second tightening members 4, 5 are loose, the inner tube 11 and the outer tube 21 are relatively slid in the axial direction. By doing so, the total length can be increased or decreased. After the total length of the telescopic tube 1 is adjusted to a desired length in this manner, the screw portions 41 and 51 of the first and second tightening members 4 and 5 are screwed together to tighten the first tightening member 4. The ring body 3 is pressed in the axial direction by the pressing surface 43 of the outer tube 21 and the pressing surface 25 of the expansion piece 24 pressed by the engagement of the pressing portion 52 of the second tightening member 5 with the pressing surface 43. For this reason, a force in the direction of reducing the diameter of the ring body 3 is generated by the action of the pressing surfaces 25 and 43 and the inclined surface 31 of the ring body 3, and the ring body 3 is reduced in diameter by this force, and the inner tube 11 is sandwiched. Hold under pressure. In this state, the ring body 3 and the inner tube 11 do not slide in the axial direction. This action is exerted by the ring body tightening mechanism described above. In addition, since the pressing portion 52 and the pressing surface 25 are in pressure contact with the inclined surface 31 of the ring body 3 from both sides of the ring body 3, the ring body 3 and the first and second tightening members are in contact with each other. The members 4, 5 do not move in the axial direction. Therefore, relative sliding between the inner tube 11 and the outer tube 21 is prevented, and the total length of the telescopic tube 1 is fixed. The press-contact portions between the inclined surface 31 of the ring body 3 and the pressing surface 25, the press-contact portions between the inclined surface 31 of the ring body 3 and the press surface 43, and the press-contact portions between the ring body 3 and the inner tube 11 are so-called, respectively. It becomes a metal touch state and exhibits watertightness. Further, the ring body 3 may be made of rubber, and when the ring body 3 is made of rubber, the press-contact portions are in close contact with each other to exhibit watertightness.

When the total length of the telescopic tube 1 is set to a desired length in this way, there is no need to cut the long tube to a desired length and use it as a hot water supply pipe.

Next, as shown in FIGS. 3 and 4, joints 6 and 7 are attached to the outer end of the inner tube 11 and the outer end of the outer tube 21, respectively. 7 can be connected to a mating pipe or joint provided at the top or bottom of the hot water boiler. Further, the inner tube 11 has a bellows-like flexible portion 13 at two locations near the joint 6, and a non-flexible portion that cannot be bent at other locations. The outer tube 21 also has a bellows-like flexible portion 26 in the vicinity of the joint 7, and a non-flexible portion that cannot be bent in other portions. With this configuration, the telescopic tube 1 is raised up and down along the body of the hot water supply boiler, and, for example, the joint 6 of the inner pipe 11 is connected to a mating pipe or a joint provided at the top of the hot water supply boiler. At this time, it is possible to easily align the joint 6 with the mating pipe or the joint by bending the flexible portions 13 and 14.

[0017]

[Effect of the invention]

 As described above, according to the hot water supply piping unit of the present invention, it is possible to eliminate the labor and skill required for cutting the long pipe on site, and thus to transport the long pipe to the construction site. At the same time, it is possible to meet the demand for shortening the construction period.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a piping unit for hot water supply according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of FIG. 1;

FIG. 3 is a partially omitted side view of the inner tube.

FIG. 4 is a partial side view of the outer tube.

FIG. 5 is a partially cutaway front view of the ring body.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Telescopic tube 3 Ring body 4 First tightening member 5 Second tightening member 6, 7 Joint 11 Inner tube 13, 14, 26 Flexible portion 21 Outer tube 24 Expanding piece 25 Pressing surface 31 Inclined surface 41 Screw portion 43 Pressing surface 51 Screw part 52 Press part

Claims (5)

[Utility model registration claims] A telescopic tube having an inner tube and an outer tube fitted slidably relative to each other in an axial direction; a metal or rubber ring body slidably fitted to the inner tube;
A first fastening member having a threaded portion slidably fitted to the inner tube; and a threaded portion slidably fitted to the outer tube and screwable into the threaded portion of the first fastening member. A second tightening member, and when the screw portions of the first and second tightening members are screwed together and tightened, the ring body is compressed in the axial direction to reduce the diameter and hold the inner tube. A ring body fastening mechanism for preventing the ring body from moving in the axial direction with respect to the outer pipe when the ring body holds the inner tube by the action of the ring body fastening mechanism; A hot water supply piping unit, comprising: And a second tightening member, wherein the ring body tightening mechanism is provided on a second tightening member, wherein the ring body tightening mechanism is formed in an annular shape at a tube end of the outer tube and has an inner surface formed by a tapered pressing surface. A pressing portion for engaging with the expanding piece and pressing the expanding piece, a tapered pressing surface formed in an annular shape at the tip of the first fastening member, 2. A pressing surface of the expanding piece portion and a pressing surface of the first tightening member formed by an inclined surface which presses against each other when the screw portions of the first and second tightening members are screwed together and tightened. The hot water supply piping unit described in 1. 3. The ring body fixing mechanism according to claim 2, wherein the ring body fixing mechanism is formed by a pressing surface of the expanding piece portion pressed against an inclined surface of the ring body and a pressing surface of the first tightening member. Hot water supply piping unit. 4. A part of at least one of the inner tube and the outer tube in the axial direction is formed as a bendable flexible portion, and the remaining portion of the tube is inflexible and non-bendable. The hot water supply piping unit according to any one of claims 1 to 3, wherein the piping unit is formed as a part. 5. A joint which can be connected to a connection port of a mating pipe is provided at both ends of the telescopic tube, and the flexible portion is provided at least at a location near the joint on one side. 4. The hot water supply piping unit described in 4.