JP2002071081A - Flexible fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible fitting which can easily connect resin tubes with adhesive. SOLUTION: A flexible fitting 1 is formed with a resin layer 4 the same material as a resin tube 10 to be connected on the surrounding side of the end connection 3 of a fitting body 2 made from flexible material. Then the resin tube 10 is connected to the flexible fitting 10 by inserting the resin tube 10 covered with adhesive on its edge outer side into the connection part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vinyl chloride pipe (P).
The present invention relates to a flexible joint for connecting a resin pipe that can be bonded with an adhesive such as a VC pipe.

[0002]

2. Description of the Related Art Generally, a hard joint made of the same material as a resin pipe is used for connecting or branching a PVC pipe or another resin pipe that can be bonded with an adhesive. For example, rigid PVC is used for connecting PVC pipes.
PV with C joint used and adhesive applied to its connection port
Insert and glue the end of the C tube. However, when the PVC pipe is buried in the ground or laid in a building, the connection or branching of the resin pipe laid in a place where vibration is received, or the connection of the resin pipe to a rotating device that generates vibration is required. In some cases, flexible joints are used.

A conventional flexible joint used for connecting or branching a resin pipe has a joint body made of a flexible material such as rubber, and a plurality of connection ports provided therein. There are two types of connection methods: a flange type and a plug-in type. In the case of the flange type, a companion flange is provided at the end of the resin pipe, and the flanges are connected by bolts via packing. In the case of a plug-in type, the end of the resin tube is inserted into the connection port, and the outer peripheral surface is fastened with a fastening band.

[0004]

However, when using either the flange type or the plug-in type, it takes a lot of time and effort for construction compared to one-touch connection or branching with an adhesive like a hard joint. There's a problem. Further, the flange type is limited in dimension when the installation place is narrow, and is disadvantageous in cost. Further, the plug-in type has a risk of leakage when the fastening is incomplete. Therefore, an object of the present invention is to solve these problems in a conventional flexible joint for a resin pipe, and an object of the present invention is to provide a new flexible joint for that purpose.

[0005]

That is, the present invention relates to a flexible joint for connecting a resin pipe which can be bonded with an adhesive, and is provided on an inner peripheral surface of a connection port of a joint body made of a flexible material. A resin layer of the same material as the resin pipe to be connected is formed (claim 1). In the above flexible joint,
The joint body can be made of a rubber material, and the resin layer can be formed by vulcanizing and bonding a short resin tube to the inner peripheral surface of the joint body. In any of the above flexible joints, the resin pipe is connected to P
It can be a VC tube (claim 3).

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a sectional view of an elbow-shaped flexible joint according to the present invention, and FIG. 2 is a partially cutaway front view showing a state in which a resin pipe is connected to the flexible joint of FIG. The flexible joint 1 has a joint body 2 bent at a substantially right angle and two connection ports 3 provided at both ends of the joint body 2.
A resin layer 4 of the same material as the resin tube 10 is provided on the inner peripheral surface of the resin tube 10.

The joint body 2 can be made by molding a flexible material such as vulcanized rubber or flexible resin. The resin layer 4 can be formed, for example, by bonding a short resin tube 5 to the inner peripheral surface of the connection port 3. For example, when the joint body 2 is a vulcanized rubber and the resin pipe 10 to be connected is a PVC pipe, a PVC resin short pipe 5 is used and formed by vulcanizing and bonding to the inner peripheral surface of the connection port 3. can do.

In order to form the resin layer 4, instead of using the short resin tube 5 as described above, a thick resin sheet of the same material can be bonded. Alternatively, the resin layer 4 can be formed by thickly applying and drying a paint layer of the same material. In order to connect the resin tube 10 to the flexible joint 1 as shown in FIG. 2, an adhesive is first applied to the outer peripheral surface of the end of the resin tube 10, and then the end is connected to the connection port of the flexible joint 1. 3 may be inserted. For example, when the resin pipe 10 is a PVC pipe and the material of the resin layer 4 of the connection port 3 is PVC, a commercially available adhesive for PVC can be used.

FIG. 3 is a sectional view of a tee (T) -shaped flexible joint according to the present invention. The flexible joint 1 in this case also has a joint body 2 and connection ports 3 provided at three ends of the joint body 2 similarly to FIG. A resin layer 4 of the same material as the tube 10 is provided. Note that the joint body 2 and the resin layer 4 are also configured in the same manner as in FIG.

FIG. 4 shows still another embodiment of the present invention and is a sectional view of a flexible joint whose axis is bent at an obtuse angle. The flexible joint 1 in this case also has a joint body 2 and connection ports 3 provided at two ends of the joint body 2 similarly to FIG. Tube 10
A resin layer 4 of the same material as that of FIG. Note that the joint body 2 and the resin layer 4 are also configured in the same manner as in FIG.

FIG. 5 is a sectional view of a cross-shaped flexible joint according to the present invention. The flexible joint 1 in this case also has a joint body 2 and connection ports 3 provided at four ends of the joint body 2 as in FIG. A resin layer 4 of the same material as the tube 10 is provided. Note that the joint body 2 and the resin layer 4 are also configured in the same manner as in FIG.

FIG. 6 is a sectional view of a straight tubular flexible joint according to the present invention. The flexible joint 1 in this case also has a joint body 2 and connection ports 3 provided at two ends of the joint body 2 similarly to FIG. A resin layer 4 of the same material as the tube 10 is provided. Note that the joint body 2 and the resin layer 4 are also configured in the same manner as in FIG. Such a flexible joint, together with a resin pipe connected thereto, is buried underground or laid in a building.

[0013]

As described above, according to the flexible joint of the present invention, the connection can be made in one-touch only by inserting the end of the resin pipe coated with the adhesive into the connection port of the joint main body.
This allows for seismic piping. By using the flexible joint of the present invention, branching and connecting of pipes can be performed easily and quickly. Moreover, unlike the conventional flange type connection, it does not take up space, and the risk of leakage due to workability such as a plug-in type connection is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an elbow-shaped flexible joint according to the present invention.

FIG. 2 is a partially cutaway front view showing a state where a resin pipe is connected to the flexible joint of FIG. 1;

FIG. 3 is a sectional view of a tee (T) -shaped flexible joint according to the present invention.

FIG. 4 is a sectional view of a bent flexible joint according to the present invention.

FIG. 5 is a cross-sectional view of a cross-shaped flexible joint according to the present invention.

FIG. 6 is a sectional view of a straight tubular flexible joint according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible joint 2 Joint main body 3 Connection port 4 Resin layer 5 Resin short tube 10 Resin tube

Claims (3)

[Claims] 1. A flexible joint for connecting a resin pipe that can be bonded with an adhesive, a resin pipe 10 to be connected to an inner peripheral surface of a connection port 3 of a joint body 2 made of a flexible material. A flexible joint, wherein resin layers 4 of the same material are formed. The joint body 2 is made of a rubber material, and a resin layer 4 is provided.
The flexible joint according to claim 1, wherein the resin short pipe (5) is formed by vulcanizing and bonding a resin short pipe (5) to an inner peripheral surface of the joint body (2). 3. The flexible joint according to claim 1, wherein the resin pipe is a PVC pipe.