JPH07186270A - Connection of pipe material - Google Patents

Abstract

PURPOSE:To facilitate setting at the time of clamping even when joints such as an elbow or the like are contained in a piping material to be connected. CONSTITUTION:A plurality of marks MJ, MJ are formed on the outer peripheral surfaces S1, S2 of at least the pipe end parts of piping materials J1, J2 to be connected along the peripheral directions of the piping materials at a predetermined pitch so as to show the positions in the peripheral directions of the outer peripheral surfaces. When the piping materials J1, J2 are clamped by a pair of clamps 1, 2, the pipe end surfaces of the respective piping materials J1, J2 are brought into contact with each other and the piping materials J1, J2 are respectively fixed in such a state that the respective marks MJ are mutually matched to perform the angle indexing of the piping materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting pipe materials such as pipes and joints formed of synthetic resin.

[0002]

2. Description of the Related Art As a method of connecting piping materials of synthetic resin moldings, the piping materials are grasped by a pair of clamps, the connecting ends of the respective piping materials are melted by heating with a heater, and then the pair is operated by a handle operation or the like. There is a method of abutting and fusing the respective melting portions by moving the clamps of the above in a direction in which they approach each other (for example, Japanese Patent Application No. 56-26217).

[0003]

By the way, in the case of connecting joints such as elbow in the above-mentioned joining method,
The angle of each connecting joint needs to be set during setting, but the angle can be adjusted by, for example, temporarily fixing the elbows J11, J12 to the pair of clamps 11, 12 as shown in FIG. It is carried out visually by applying A, and for this reason, a slight angle deviation is unavoidable and accurate angle adjustment cannot be performed at present.

Further, such angle adjustment is complicated and the workability is poor, and particularly when the assembly of the piping material is long and has many bends, many man-hours are required for setting. The number of man-hours required for setting in the joining process of each of these parts is one joint part in an average time, temporary tightening of clamp: 60se
c, Angle check: 20sec, Direction check: 10sec, Clamp fixing: 10sec, a total of 100sec is required, which is very long compared to the actual heating and melting time of the joining process: 20sec, joining time: 20sec. As shown in Fig. 6, there are many joints such as elbows, cheeses, flanges, etc.
If the number of locations is large, the total man-hours required for setting will account for about 50% of the total man-hours (40 min) of the entire assembly.

The present invention has been made in view of such circumstances, and an object thereof is to facilitate setting at the time of clamping even if a pipe material for connection includes a joint such as an elbow. To provide a method.

[0006]

In order to achieve the above object, the connecting method of the present invention is, as shown in FIG. 1 corresponding to the embodiment, shown in FIG. A plurality of marks MJ ··· MJ indicating the circumferential position of the outer peripheral surface are formed on the outer peripheral surface S1, S2 at a predetermined pitch along the peripheral direction (a), and a pair of these piping materials J1, J2 are formed. When the clamps 1 and 2 are gripped by the clamps 1 and 2, the pipe end faces of the pipe members J1 and J2 are brought into contact with each other, and the pipe members J1 and J2 are fixed with the marks MJ thereof aligned.

[0007]

For example, when the pipe material J1 to be connected is fixed to one clamp 1 and the pipe material J2 is fixed to the other clamp 2, the pipe material J2 is set at a predetermined angle with the pipe center as an axis. By turning and displacing the position of the mark MJ to be aligned with the fixed-side piping material J1, the angle can be set at a relative angle of 90 °, for example.

Moreover, the piping material J2 to the other clamp 2
For the setting of, the pipe material J1 fixed with the pipe end face first
Since it is performed by making contact with the pipe end surface of the pipe, the alignment of the pipe materials J1 and J2 can be performed at the same time as the above-mentioned angle adjustment.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of an embodiment of the present invention, and shows an example in the case of fusion-bonding a resin elbow.

First, the elbows J1 and J2, which are piping materials, are usually clamped at either one of both ends during the setting in the connecting step. Therefore, in this embodiment, a plurality of marks MJ..MJ are attached to the outer peripheral surfaces S1 and S2 of the respective end portions, as shown in FIG. 1 (a). The marks MJ are lines extending in a direction parallel to the central axis of the elbow, and are arranged at a constant pitch (pitch of 30 °) along the circumferential direction of the outer peripheral surfaces S1 and S2.

In the connection procedure of this example, first, the pair of clamps 1 and 2 are set in the clamp open state, and the clamps 1 and 2 are arranged with a predetermined gap therebetween.
The pipe material J1 is fixed to either one of the clamps 1 and 2. At this time, it is not particularly necessary to strictly position the pipe material J1 with respect to the clamp 1.

Next, the pipe member J2 is arranged on the other clamp 2, and the pipe end face is first brought into contact with the pipe end face of the fixed pipe member J1. Then, the pipe M2 is rotated and the mark MJ to be aligned with the mark MJ of the pipe J1 is shifted by an arbitrary number, for example, three, and the pipe J2 is clamped. As a result, the piping materials J1 and J2 are set in a state in which the relative angle is 90 ° (FIG. 1 (b)). At the time of this setting, the piping materials J1 and J2 are aligned at the same time.

A heater is arranged between the pair of clamps 1 and 2 to heat and melt the connecting end of each of the piping materials J1 and J2 with or without contact with the heater heating surface, and then the heater. Then, the pair of clamps 1 and 2 are moved relative to each other to bring the melted portions of the pipe materials J1 and J2 into contact with each other, thereby performing butt fusion.

In the procedure described above, the pipe material J1 is first fixed to the one clamp 1 and then the pipe material J2 is fixed to the other clamp 2, but the present invention is not limited to this. The method of the present invention can also be carried out by a procedure in which the pipe materials J1 and J2 are arranged on both of the pipes 1 and 2 and the clamps are clamped while the pipe materials J1 and J2 are angled.

Further, in the above procedure, an example in which the pipe members J1 and J2 are angled at a relative angle of 90 ° has been described, but in this embodiment, the pipe members are mutually displaced during setting. It is also possible to perform angulation at a pitch of 30 ° rather than appropriately selecting the number of marks MJ. The arrangement pitch of the marks MJ ··· MJ to be attached to the piping materials J1 and J2 is not limited to the angle of 30 °, and is arbitrary.
For example, if the angle pitch is set to 15 °, the angulation normally required in this type of connection work can be substantially satisfied.

Further, as the marks to be attached to the respective piping materials J1 and J2, in addition to the line shape shown in FIG. 1 (a), for example, a short line ML as shown in FIG. 2 (a) or the same figure.
Any shape, such as the dot MD shown in (b), can be adopted as long as the alignment at the time of clamping is possible.

In the method of the present invention, the piping material J1,
As a method of marking J2, for example, a general printing method such as printing, transfer or hot stamping, or a method such as marking using laser light can be mentioned. Also, instead of these printing methods, minute protrusions (for example, about 0.05 to 0.2 mm) or grooves are integrally formed on the outer peripheral surface of the piping material when the piping material is molded, and those protrusions or recesses are used as marks. You may employ the method of doing.

Next, an example in which the method of the present invention is applied when connecting joints through a straight pipe will be described. FIG. 3 is an explanatory view of the embodiment. First, the straight pipe P1, used in this example
As shown in FIG. 3 (a), P2 has a plurality of marks MP..MP on its outer peripheral surface. Each mark MP is a line extending in a direction parallel to the pipe center, as in the embodiment shown in FIG. 1 (a), and has a constant pitch (angle of 30 °) along the circumferential direction of the outer peripheral surface. Are arranged in.

In this example, the joints J3, J4 and the straight pipes P1, P2 are first connected. In addition, since the connection work is the connection between the joint and the straight pipe, it is not necessary to angle out,
Therefore, it is not necessary to mark each joint J3, J4.

Next, the straight pipes P1 and P2 that have completed the above connection
In the same manner as in the previous embodiment, the procedure for connecting the pair of clamps 1 and 2 is such that the pair of clamps 1 and 2 are in the clamp open state and are spaced apart from each other by a predetermined distance. Straight pipe P is attached to either clamp 1 or 2
Fix 1

Next, the straight pipe P2 is arranged in the other clamp 2, and the pipe end face of the straight pipe P1 is brought into contact with the pipe end face of the fixed straight pipe P1 first.
Is rotated appropriately, and the straight pipe P2 is clamped in a state where the marks MP aligned with the mark MP of the straight pipe P1 are displaced from each other by three. As a result, straight pipes P1 and P
2 That is, the joints J3 and J4 were set with the relative angle of 90 ° [Fig. 3
(b)]. At the time of this setting, straight pipes P1 and P
Align with 2 at the same time.

After the above settings are completed, the connecting ends of the straight pipes P1 and P2 are melted by heating with a heater, and then the melted portions are brought into contact with each other in the same manner as in the previous embodiment. The pipes P1 and P2 are butted and fused together.

In this embodiment also, each straight pipe P1,
The method of marking P2 is arbitrary, and the various methods listed in the previous embodiment are adopted. Also, as the mark,
In addition to the line MP shown in FIG. 3A, for example, a dot MD as shown in FIG. 4A or a shape of a broken line MB as shown in FIG. 4B may be adopted.

Here, in the above two embodiments, the example in which the method of the present invention is applied to the butt fusion bonding is explained.
The present invention is not limited to this, and can be applied to socket fusion bonding or adhesive connection using a socket and an adhesive.

[0025]

As described above, according to the connection method of the present invention, a plurality of marks are arranged on the outer peripheral surface of the pipe material to be connected at a predetermined pitch along the circumferential direction to set the pipe material. In this case, since the marks of each piping material are aligned with each other and clamped, it is not necessary to perform visual angle adjustment work using a goniometer, which allows the piping material to be accurately angled in a short time. be able to. In particular, when connecting a long pipe assembly, the angle adjustment becomes much easier than in the past, and the workability thereof is dramatically improved.

Further, according to the method of the present invention, since the piping materials can be aligned at the same time during setting, there is an advantage that the connection is highly reliable.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the method of the present invention.

FIG. 2 is a view showing a modified example of a mark attached to a piping material used in the embodiment.

FIG. 3 is an explanatory view of another embodiment of the method of the present invention.

FIG. 4 is a view showing a modified example of a mark attached to a piping material used in the embodiment.

FIG. 5 is a diagram showing an example of a conventional technique for angle determination of joints.

FIG. 6 is a diagram showing an example of a connection part of a piping assembly.

[Explanation of symbols]

 1, 2 Clamps J1, J2 Piping material (elbow) S1, S2 Outer peripheral surface of pipe end P1, P2 Piping material (straight pipe) MJ, MP mark

Claims (1)

[Claims] 1. A method of holding a pipe material such as a resin pipe and a joint between a pair of clamps facing each other, and connecting the pipe materials by fusion bonding or adhesion, at least the pipe material to be connected. On the outer peripheral surface of the end portion, a plurality of marks indicating the position of the outer peripheral surface in the circumferential direction are formed at a predetermined pitch along the circumferential direction, and when these pipe materials are gripped by the pair of clamps, A method of connecting pipe materials, characterized in that the pipe end surfaces of the pipe materials are brought into contact with each other and each pipe material is fixed in a state where the marks are aligned.