JPH0531350Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a connection mechanism between a pipe and a joint, which is mainly used when piping is connected to a corner part between a ceiling and a wall.

[Conventional technology]

Traditionally, for example, when piping a building, pipes and fittings with a circular cross-sectional shape are
It is customary to use a bracket to securely install the pipe on a wall or the like, and by using a pipe and a joint with a circular cross section like this, it is possible to ensure good circulation of the liquid flowing inside the pipe. In this case, it is necessary to securely seal between the pipe and the joint to prevent leakage of the liquid flowing inside. A specific example of such a seal structure is, for example,
It is disclosed in Japanese Patent Application Laid-open No. 93689 and Japanese Patent Application Laid-open No. 59-212591.

On the other hand, there are cases in which liquid does not flow through the piping, and in this case, good flowability is not required.
Examples include cases where gas or the like flows through the pipes and joints, and cases where only a plurality of electric wires are passed through the pipes and joints. Therefore, in this case, it is not necessary to make the cross-sectional shape of the pipe and the joint circular.
It is also possible to use a tube with a square cross section (called dust in the publication) as disclosed in Publication No. -42285. Not only is it necessary to securely seal between the pipe and the joint when the gas, etc. is flowing, but also when multiple electric wires are being passed through, it is necessary to connect the electric wires to the outside. In order to protect the pipe from contaminated air and prevent its corrosion, it is necessary to ensure a seal between the pipe and the joint.

[The problem that the idea aims to solve]

However, when pipes and fittings with a circular cross section are used as in the conventional method described above, when piping is installed at a corner such as between a ceiling and a wall (vertical wall), the outer circumferential surface of the pipe and fittings is connected to the ceiling surface. It is not possible to reliably fit the piping between the pipe and the wall surface, and as a result, the piping space becomes larger than necessary, and the outer circumferential surface of the pipe and fitting protrudes from the corner in an arcuate cross-section. This has the problem of causing deterioration in appearance.

In addition, when using pipes and fittings with a square cross section, although it is possible to fit the two outer surfaces securely between the ceiling surface and the wall surface, the other two outer surfaces The pipe protrudes from the corner at a right angle in cross-section, so if the piping is installed at a corner between the floor and the wall, there is a risk of injury to pedestrians due to the perpendicular protrusion. In addition to this, there was a problem in that the right-angled protrusion deteriorated the appearance.

Furthermore, regarding the sealing structure of the joint between the pipe and the joint, there is no conventional sealing structure that can ensure sufficient sealing performance.
93689 and Japanese Unexamined Patent Publication No. 59-212591, the sealing member (packing) is in close contact only with the opposing end surfaces of one tubular body and the other tubular body, and Therefore, the sealing force by the sealing member depends only on the clamping force of both tubular bodies, excluding the sealing force obtained by the fluid pressure.In other words, when no fluid pressure acts on the sealing member, the sealing force is good. This results in a problem that the sealing function is deteriorated when the elasticity of the sealing member is not appropriate or when almost no fluid pressure acts on the sealing member.

This idea was made in view of the above-mentioned circumstances, and aims to create a connection mechanism between pipes and fittings that not only improves the appearance when piping is installed in the corners of buildings, but also improves sealing performance. The technical challenge is to provide such information.

[Means to solve the problem]

Specific means for achieving the above technical problem include a tube having a chevron-shaped protrusion formed on at least one surface of the outer surface of the end and having a right triangular cross section; The connecting portion with the joint is formed with a chevron-shaped protrusion and has a right-angled triangular cross-section, and the cross-sectional shape is a right-triangular triangle that is in close contact with the outer surface of each end of the pipe and the joint and each chevron-shaped protrusion. Along with arranging a patchkin that is
A clamping tool having a right triangular cross section that clamps each of the chevron-shaped protrusions is divided into a plurality of parts and fixed, and the clamping tool is disposed in close contact with the outer surface of the packing.

[Effect]

According to the above means, since the cross-sectional shapes of all the components of the pipe, joint, packing, and clamping tool are right triangular, for example, when piping is installed along a corner between a ceiling and a vertical wall, The two perpendicular surfaces of all of the above-mentioned components can be aligned with the ceiling surface and the vertical wall surface, and they can be reliably fitted into the corners, reducing the piping space as much as possible, and all the above-mentioned configurations The part that appears externally at the corner of the element is only a flat sloped surface, and unnecessary protrusions that appear when the cross-sectional shape is circular or square no longer appear as an external appearance, and the appearance is improved. Become.

In addition, the gasket that seals the joint between the pipe and the fitting is in close contact with the chevron-shaped protrusion of the pipe and the chevron-shaped protrusion of the joint in the longitudinal direction of the pipe, and in the direction perpendicular to this, the seal is in close contact with the pipe and the chevron-shaped protrusion of the joint. If the outer surface of each joint and the clamping part (inner surface thereof) are in close contact with each other, that is, the packing is completely closed on all sides, and therefore no fluid pressure acts on the packing, for example, inside the pipe and fitting. Even when a plurality of electric wires are passed through the tube, a reliable seal is formed, and contaminated air and the like are completely prevented from entering the inside of the tube. Since the clamping tool is fixed into a plurality of parts and the outer surface of the packing is in close contact with the clamping tool, the fixing force, that is, the tightening force at the divided parts of the clamping tool can be changed. As a result, the pressure applied from the clamping tool to the outer surface of the packing changes, and the sealing force by the packing changes accordingly, and this changes the internal state of the pipe, such as whether high-pressure fluid or low-pressure fluid flows inside the pipe. This means that differences can be dealt with favorably.

〔Example〕

An embodiment of this invention will be described below based on the drawings.

The pipe-to-joint connection mechanism of the embodiment of this invention is composed of a pipe 1, a joint 2, a packing 3, a receiver 4, and a presser 5, as shown in FIGS. 1 and 2.

The tube 1 has a right triangular cross section, and a protrusion 8 having an inclined surface 6 formed by expanding the tube into a chevron shape using a tube expansion device or the like is provided on the outer surface of the end thereof. The joint 2 has a right triangular cross section, and has a protrusion 9 having a chevron-shaped inclined surface 7 on the outer surface of its end, and a fitting recess 10 for joining the pipe 1 on the inner surface of the end. It is provided. When the pipe 1 is fitted into the fitting recess 10, the fitting recess 10 is
It has a depth at which the end surface of the tube 1 comes into contact with the bottom of the tube. The packing 3 is made of a flexible material such as a rubber material and is formed into a right triangular shape having a stepped inner surface that is approximately equal to the outer surface of the tube 1 and the outer surface of the fitting 2. Formed into tapered surfaces 11 and 12 that, when fitted into the recess 10, have a narrow inner width that is approximately equal to the sloped surfaces 6 and 7 on the opposite sides of the protrusions 8 and 9 of the tube 1 and the joint 2, respectively. has been done. The receiver 4 has an inward collar on each side of a plate bent at right angles at the center, which abuts the inclined surfaces 6, 7 of the protrusions 8, 9 on the non-opposed sides of the tube 1 and the fitting 2. 13 and 14 are both ends 1 of this plate material
5. Holder 5
In this case, each side of a plate material whose both ends 16 are bent at an acute angle in opposite directions is brought into contact with the inclined surfaces 6, 7 of the protrusions 8, 9 of each of the tube 1 and the fitting 2 on the non-opposing sides. Inward flanges 13 and 14 are provided except for both ends 16. Therefore, in this embodiment, the holding tool 4 and the holding tool 5 constitute a holding tool that holds the projections 8 and 9, respectively.

The pipe 1, the joint 2, the packing 3, the receiver 4, and the presser 5 constitute a connection mechanism between the pipe and the joint as described below.

A packing 3 is attached to the joint 2 on the side where the protrusion 9 is provided.
and fit the pipe 1 on the side where the protrusion 8 is provided into the fitting recess 10 of the joint 2, so that the inclined surface 6 of the protrusion 8 of this pipe 1 and the tapered surface 11 of the packing 3 are brought into contact. . Next, the inward flange 13,1 of the receiver 4
The receiver 4 is brought into close contact with the gasket 3 so that the retainer 4 can come into contact with the inclined surfaces 6, 7 on the non-opposing sides of the protrusions 8, 9 of the tube 1 and the fitting 2, respectively, and the inward direction of the presser 5 is The collar 14 is the sloped surface 6, 7 on the non-opposed sides of the projections 8, 9 of the pipe 1 and the joint 2.
The presser 5 is brought into close contact with the gasket 3 so that the receiver 4 and the presser 5 can be brought into contact with each other at both ends 1.
5 and 16, fix by screwing or the like.

According to the connection mechanism of the pipe and fitting described above, the receiver 4
By fixing both ends 15 of the and both ends 16 of the presser 5 by screwing or the like, the seal 3 is pressed by the receiver 4 and the presser 5, and the protrusions 8, 9 of the pipe 1 and the joint 2 are pressed together. The slanted surfaces 6, 7 on opposite sides of the slanted surfaces 6, 7 and the respective outer surfaces are in close contact with each other. At this time, pipe 1 and joint 2
The inwardly facing flange 13, 14 of each of the receiver 4 and presser 5 comes into contact with the inclined surfaces 6, 7 of the protrusions 8, 9 on the non-opposing sides, and the joint between the pipe 1 and the fitting 2 is separated. Therefore, the packing 3 maintains close contact between the inclined surfaces 6 and 7 and the outer surface to prevent fluid from leaking from the joining position of the pipe 1 and the joint 2.

As shown in FIG. 3, the piping connected by the above-mentioned pipe-to-fitting connection mechanism is connected to the receiver 4 and the retainer so that the corner of the receiver 4 coincides with the corner 17 of the ceiling, wall, etc. By attaching the fixture 5 and fixing both ends 15, 16 of each of the receiving fixture 4 and the holding fixture 5 to the ceiling, wall, etc. by screwing, etc., it is possible to create a product with a smooth appearance without the need for a bracket, etc. Become.

In addition, the respective projections 8 and 9 of the pipe 1 and the joint 2
is not necessarily formed on three outer surfaces of the pipe 1 and the fitting 2, but even if it is formed on only two outer surfaces or one outer surface, it is possible to maintain the connection between the pipe 1 and the fitting 2 and prevent fluid from leaking from the joint position. It's fine if it doesn't happen. Further, instead of being fixed at both ends 15 and 16 of the receiving tool 4 and the holding tool 5, which are clamping tools, the holding tool 4 and the holding tool 5 may be fixed at other positions.

[Effect of idea]

As described above, according to the pipe-to-fitting connection mechanism according to this invention, the cross-sectional shapes of all the components, the existing pipe, the fitting, the packing, and the clamping tool are right triangular, so that, for example, the ceiling and the vertical wall can be connected. When piping is installed along a corner between the two, the two perpendicular faces of all of the components fit into the corner, allowing piping to take place in less space. Only a flat sloped surface will appear at the corner, which not only improves the appearance, but also prevents injuries to pedestrians when the corner is located between the floor and vertical wall. The danger will be avoided.

Furthermore, the gasket that seals the connection between the pipe and the fitting has a chevron-shaped protrusion on the pipe, a chevron-shaped protrusion on the joint,
The seal structure is such that it is in close contact with the outer surface of the pipe and fitting and the clamping tool (its inner surface), and completely closes the inside and outside on all sides, so it cannot perform a good sealing function unless fluid pressure is applied sufficiently. In contrast, even when no fluid pressure is applied, for example when wires are passed through pipes and fittings, a reliable seal is created, preventing contaminated air from outside from entering the pipe, and preventing the wires from becoming contaminated with air. In addition, the sealing force of the seal can be easily changed by simply changing the clamping force of the divided clamping tool and changing the pressure force applied from the clamping tool to the outer surface of the packing. This makes it possible to respond well to different uses.

[Brief explanation of the drawing]

Figures 1 to 3 show examples of this invention,
Figure 1 is a cross-sectional view showing the connection state of the pipe and joint, Figure 2
The figure is a half sectional view of FIG. 1, and FIG. 3 is an explanatory diagram for explaining the attached state. 1...pipe, 2...fitting, 3...packet, 4...
... Receiving tool (clamping tool), 5... Holding tool (clamping tool),
6, 7... Inclined surface, 8, 9... Protrusion, 10...
Fitting recess, 11, 12...Tapered surface, 13, 1
4...Inward spit.

Claims (1)

[Scope of utility model registration request] A tube with a chevron-shaped protrusion formed on at least one outer surface of the end and a right triangular cross-section; and a joint with a chevron-shaped protrusion formed on at least one outer surface of the end and a right triangular cross-section. A gasket having a right triangular cross section that is in close contact with the outer surface of each end of the pipe and the joint and each of the chevron-shaped protrusions is disposed at the connection portion with the pipe and the joint, and each of the chevron-shaped protrusions A connection mechanism for a pipe and a joint, characterized in that a clamping tool having a right triangular cross-section, which clamps the pipe, is divided into a plurality of parts and fixed, and the clamping tool is arranged in close contact with the outer surface of the packing.