JPH0651674U - Joint structure of rigid vinyl chloride pipe - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a joining structure of a hard vinyl chloride pipe in which a straight pipe is less likely to come off than a conventional adhesive joining. [Structure] A structure in which a hard vinyl chloride pipe is joined by adhesive joining via a socket joint, and the socket joint is penetrated through the socket joint at a plurality of positions at both ends or in the vicinity thereof in the direction of the central axis of the socket joint. This is a structure in which inserts are provided, and the socket joint and the hard vinyl chloride pipe are joined through a joining member such as a screw through the inserts.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a joining structure of a hard vinyl chloride pipe, and more particularly to a joining structure to which a retaining technique is applied in the joining and joining of a hard vinyl chloride pipe.

[0002]

[Prior art]

 Conventionally, there are the following methods for joining rigid vinyl chloride pipes. (A) Adhesive joining using an adhesive (b) Flange joining where the flange provided at the pipe end is tightened with bolts, etc. (c) Screw joining in which screws cut at the pipe end are engaged Adhesive bonding is most commonly used because of its cost and workability. FIG. 2 shows two hard vinyl chloride straight tubes with an adhesive bond. When performing the adhesive bonding, first, an operator brushes the adhesive on the surface of the straight pipe 1 with the socket joint 4 and on the inner surface of the socket joint 4. Then, the straight pipes 1 are inserted into the socket joint 4. Then, the adhesive dissolves the vinyl chloride, and the vinyl chloride expands to adhere. Here, a curing period is set to solidify the adhesive. Curing is performed by leaving the joint for about two hours after joining so that no force is applied to the joint.

[0003]

[Problems to be solved by the device]

 Since the conventional adhesive bonding has been performed as described above, due to uneven coating of the brush by the worker, lack of curing, etc. Water leakage may occur in areas with little coating. If water leakage occurs, the adhesion may gradually weaken and the straight pipe 1 may slip out. And the omission leads to a large water damage accident.

The present invention has been made in order to solve such a problem, and an object thereof is to provide a joining structure of a hard vinyl chloride pipe in which a straight pipe is less likely to come off than the conventional adhesive joining. To do.

[0005]

[Means for Solving the Problems]

 The rigid vinyl chloride pipe joining structure according to the present invention is a structure in which a rigid vinyl chloride pipe is joined by adhesive bonding through a socket joint. Inserts are provided at a plurality of positions so as to penetrate in the direction of the central axis of the socket joint, and the socket joint and the hard vinyl chloride pipe are joined by a joining member such as a screw through these inserts.

[0006]

[Action]

 According to this joint structure, the hard vinyl chloride pipe is joined to the socket joint with an adhesive and mechanically joined to the socket joint with a joining member such as a screw, so that the slip-out does not easily occur.

[0007]

【Example】

 FIG. 1A is a sectional view showing a joint structure of a hard vinyl chloride pipe according to an embodiment of the present invention. In the figure, reference numeral 2 denotes a vinyl chloride cylindrical socket joint, but projections 21 are formed on the circumference of both ends (or in the vicinity of both ends) of the cylinder.

As shown in FIG. 1C, the protrusions 21 are provided at a plurality of locations (three locations in this embodiment) at equal intervals on the same circumference of the cylinder. Then, as shown in FIGS. 1B and 1C, an insert (gunmetal female screw) 22 penetrating the protrusion 21 toward the center line 24 of the cylinder is formed on the protrusion 21. ing.

At the time of joining the straight pipe 1, the worker first brushes the adhesive on the portion of the straight pipe 1 that is bonded to the socket joint 2 and the portion of the inner surface of the socket joint 4 that is bonded. Then, the straight pipes 1 are inserted into the socket joint 2. Then, screws 23 are screwed into each gun metal female screw 22. The thickness a of the protrusion 21 on which the gunmetal female screw 22 is formed is such that the tip of the screw 23 bites into the straight pipe 1 by about 1/3 to 1/4. Therefore, the straight pipe 1 is fixed to the socket joint 2 by the screw 23, and the slip-out is prevented. Then, after that, a curing period is set for hardening the adhesive.

[0010]

[Effect of device]

 As described above, the joint structure of the hard vinyl chloride pipe according to the present invention is such that the inserts are provided so as to penetrate in the central axis direction of the socket joint at each of the two ends of the socket joint or in the vicinity thereof. Since the structure is such that the socket joint and the hard vinyl chloride pipe are joined by a joining member such as a screw via the screw, the hard vinyl chloride pipe is mechanically prevented from coming off, and it is less likely to come off than the conventional joining structure. A highly reliable joint can be provided. Therefore, it is particularly effective to apply it to a place that will be seriously damaged if a water leak occurs.

[Brief description of drawings]

FIG. 1A is a sectional view showing a joint structure of a rigid vinyl chloride pipe according to an embodiment of the present invention. FIG. 1B is an enlarged cross-sectional view showing the protrusion and its periphery. Figure 1
(C) is a partial perspective view of a socket joint.

FIG. 2 is a cross-sectional view showing a rigid vinyl chloride pipe joined by conventional adhesive joining.

[Explanation of symbols]

 1 straight pipe 2 socket joint 22 gunmetal female screw (insert) 23 screw 3 adhesive joint part

Claims (1)

[Scope of utility model registration request] 1. In a joint structure of a hard vinyl chloride pipe in which a rigid vinyl chloride pipe is joined by an adhesive joint through a socket joint, the socket joint has socket joints at both ends or at a plurality of positions on the circumference in the vicinity thereof. A joint structure for a hard vinyl chloride pipe, comprising inserts penetrating in the direction of the central axis, and the socket joint and the hard vinyl chloride pipe are joined by a joining member through the inserts.