JPH0744973U - Pipe joint - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a pipe joint that is easy to handle and manufacture and that can be reliably connected. [Structure] A joint body 1 made of a tubular body, and the joint body 1
And a coupling member 3 which is externally fitted and coupled to at least one end of the coupling member 3, and a locking portion 2 which is formed to expand on one end edge of the joint body 1 is formed in the inner peripheral surface of the coupling member 3. 4 is engaged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint, and more particularly, to an improvement of a pipe joint that is used by connecting pipes when connecting the pipes to each other.

[0002]

[Prior art]

 Conventionally, for example, an elbow has been used as this type of joint for pipes. A threaded portion is formed on the outer peripheral surfaces of both ends of the elbow, and the tubular body is connected to the threaded portion through a separate socket that can be screwed.

[0003]

[Problems to be solved by the device]

 However, since the elbow and the pipe are connected through a socket separate from each other and the elbow and the socket are connected by screwing, the connecting work is extremely complicated and the work efficiency is poor, and the screw of the elbow and the like is not connected. There was a big problem that the formation of the part was very troublesome.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a pipe joint which is easy to handle and manufacture, and which can surely connect pipes. To do.

[0005]

[Means for Solving the Problems]

 That is, in order to solve the above-mentioned problems, the present invention comprises a joint body 1 made of a tubular body and a connecting member 3 which is externally fitted and connected to at least one end of the joint body 1. This is a joint for a pipe body, in which a locking portion 2 formed by expanding at one end edge is engaged with a groove portion 4 formed in an inner peripheral surface of the connecting member 3.

[0006]

[Action]

 Therefore, in the pipe joint characterized by the above structure, one end edge of the joint body 1 is expanded with one end portion of the joint body 1 fitted onto the connecting member 3 to form the joint body. The engaging portion 2 engages with the groove portion 4 formed on the inner peripheral surface of the connecting member 3 to securely and firmly connect the both.

As described above, in the pipe joint, since the joint body 1 and the connecting member 3 are integrally connected, the pipe can be directly connected to the connecting member 3.

[0008]

【Example】

 An embodiment of a pipe joint according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes an elbow as a joint body made of stainless steel, in which locking portions 2 are formed by expanding at both end edges. Reference numeral 3 denotes a connecting member having a groove 4 having a substantially V-shaped cross section formed on the inner peripheral surface of one end portion with which the engaging portion 2 of the elbow 1 engages, and is formed substantially at the center of the inner peripheral surface. A packing 6 having a partial cutout is attached to the annular recess 5. Reference numeral 7 denotes a screw hole formed in the other end of the connecting member 3 so as to penetrate therethrough in the radial direction.

Reference numeral 8 denotes a movable body inserted into the other end of the connecting member 3, and a notched surface with which a tip end of a tightening body 9 screwed into a screw hole 7 of the connecting member 3 abuts on the outer peripheral surface thereof. 10 are formed. When the movable body 9 is set at a desired position, its rear end surface is dimensioned so as to be flush with the rear end surface of the connecting member 3.

Although the present embodiment has the above-described configuration, when the connecting member 3 is connected to the elbow 1, for example, the following bulging tool is used.

In this bulge processing tool 11, as shown in FIG. 3, a disc-shaped pressing plate 12 is provided at the tip, and a rod 14 having an annular urethane 13 mounted on the back surface of the pressing plate 12 has a collar portion at one end. A cylindrical body 16 having 15 is slidably fitted therein.

Then, with one end of the elbow 1 being inserted into the connecting member 3 in a desired amount, the elbow 1 is inserted until the flange portion 15 provided on the tubular body 16 of the bulging tool 11 comes into contact with the rear end surface of the connecting member 3, When a hydraulic cylinder (not shown) connected to the rod 14 is actuated and the rod 14 is pulled in the direction of the arrow, the urethane 13 is pinched between the pressing plate 12 and the front surface of the cylindrical body 16 and is radially oriented. Will be extended to. The urethane 13 presses the inner peripheral surface of the end edge of the elbow 1 and expands it, and the locking portion 2 formed thereby engages with the groove portion 4 formed on the inner peripheral surface of the connecting member 3 so that they are It is connected securely and firmly.

As described above, since both can be connected by an extremely simple operation, good workability can be secured.

If a mark (not shown) or the like is provided on the outer peripheral surface of the elbow 1, there is an advantage that the elbow 1 can be reliably positioned when it is inserted into the connecting member 3.

After that, the joint between the elbow 1 and the connecting member 3 may be sealed with solder or a sealing agent. Similarly, the connecting member 3 is also connected to the other end of the elbow 1.

Next, the pipe A is connected to the other end of the connecting member 3, and one convex portion 17 is entirely formed on the outer peripheral surface of the end of the pipe A as shown in FIGS. It is provided so as to project over the circumference, and the movable body 8 removed from the connecting member 3 is inserted.

Then, the convex portion 17 of the tubular body A is inserted until it engages with the partition wall 3a of the coupling member 3, and the movable body 8 fitted in the tubular body A is pressed toward the coupling member 3 side. It is inserted between the connecting member 3 and the pipe A. At this time, even if the tubular body A is attached to the connecting member 3 in a slightly decentered state, the misalignment caused by the insertion of the movable body 8 is corrected and the tubular body A is deformed. Also, the deformation is corrected by the inner peripheral surface of the movable body 8.

When the pipe A is mounted on the connecting member 3 in a misaligned state, the rear facing surface of the movable body 8 projects without being flush with the rear end face of the connecting member 3, and The movable body 8 may be inserted to a desired position by appropriately correcting the misalignment of the body A. Thus, there is an advantage that the misalignment of the tubular body A 1 can be easily confirmed visually or by touch. When the movable body 8 is inserted to the desired position, the inner wall 8a of the movable body 8 and the convex portion 17 of the tubular body A are engaged with each other.

Next, when the tightening body 9 is screwed into the screw hole 7 of the connecting member 3, the tip of the tightening body 9 comes into contact with the notch surface 10 of the movable body 8. As a result, the movable body 8 is prevented from coming off, and the convex portion 17 of the tubular body A is engaged with the inner wall 8a of the movable body 8, so that the tubular body A is securely connected without being pulled out. To be done. Similarly, the pipe A may be connected to the other connecting member 3.

As described above, since a series of connecting works of the pipe bodies A can be easily performed, it can greatly contribute to the improvement of work efficiency.

Although the elbow has been described as an example of the joint body 1 in the above embodiment, the present invention is not limited to this, and is also applicable to, for example, a nipple, a T-shaped pipe, a cross pipe and the like. It is possible.

Further, the engaging portion 2 of the joint body 1 does not need to be formed so as to expand over the entire circumference as in the embodiment, and may be formed in a part thereof, depending on the pipe diameter and the intended use. It can be changed arbitrarily.

Further, the connecting means for connecting the other end of the connecting member 3 and the tubular body A is not limited to the embodiment, and for example, as shown in FIG. When the movable body 8 is mounted between the pipe body A and the connecting member 3, the notch surface 8b having an inclination angle orthogonal to the inclination angle of the screw hole 7 of the connecting member 3 is formed in the movable body. It may be formed on the outer peripheral surface of No. 8. In this case, the tip of the tightening body 9 screwed into the screw hole 7 of the connecting member 3 engages with the notch surface 8b of the movable body 8 to prevent the movable body 8 from coming off, and the pipe A is connected. It will be reliably connected to the member 3.

[0025]

[Effect of device]

 As described above, according to the present invention, since the locking portion formed by expanding the end of the joint body is engaged with the groove of the connecting member, both are securely and firmly connected and the screwing means is used. Compared to the conventional joints that connect the two, the connection work can be performed extremely easily and quickly, resulting in a significant improvement in workability.

[Submission date] December 24, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

Further, the connecting means between the other end of the connecting member 3 and the tubular body A is by no means limited to the embodiment, and for example, as shown in FIG. When a plurality of movable bodies 8 are mounted between the tubular body A and the connecting member 3, the notch surface 8b having an inclination angle orthogonal to the inclination angle of the screw hole 7 of the connecting member 3 can be moved while being formed with a plurality of intervals. It may be formed on the outer peripheral surface of the body 8. In this case, the tip of the tightening body 9 screwed into the screw hole 7 of the connecting member 3 engages with the notch surface 8b of the movable body 8 to prevent the movable body 8 from coming off, and the tubular body A is connected. It will be reliably connected to the member 3. Further, as shown in FIG. 5, a movable annular body 18 having a substantially L-shaped cross section may be interposed between the packing 6 and the movable body 8. With this structure, the tightening body 9 is screwed onto the connecting member 3. The advantage that the movable body 8 presses the annular body 18 when screwed into the hole 7 and the sealing effect of the packing 6 is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a pipe joint showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of FIG.

FIG. 3 is a cross-sectional view showing a state in which a connecting member and a pipe body are connected to each other.

FIG. 4 is a sectional view of a pipe joint joint showing another embodiment.

[Explanation of symbols]

 A ... Tube body 1 ... Joint body 2 ... Locking portion 3 ... Connecting member 4 ... Groove portion 7 ... Screw hole 8 ... Movable body 8a ... Inner wall 9 ... Tightening body 17 ... Convex portion

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[Procedure amendment]

[Submission date] December 24, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

[Figure 5]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

FIG. 5 is a cross-sectional view of a pipe joint showing another embodiment.

Claims (4)

[Scope of utility model registration request] 1. A joint main body 1 made of a tubular body, and a connecting member 3 which is externally fitted and connected to at least one end of the joint main body 1, and is formed in an expanded manner at one end edge of the joint main body 1. A joint for a pipe body, characterized in that the locking portion (2) is engaged with a groove portion (4) formed on the inner peripheral surface of the connecting member (3). 2. The pipe joint according to claim 1, wherein the other end of the connecting member 3 is provided with a connecting means capable of fitting and connecting the pipe A. 3. The connecting means of the connecting member 3 has an inner wall 8a engageable with a convex portion 17 formed on the outer peripheral surface of the tube A, and the outer peripheral surface of the tube A and the connecting member. The ring-shaped movable body 8 mounted between the inner peripheral surfaces of the connection member 3 and the screw hole 7 formed in the radial direction at least one or more on the end portion side of the connecting member 3 so that the tip end portion is movable. The pipe joint according to claim 2, comprising a tightening body 9 that comes into contact with the outer peripheral surface of the body 8. 4. The joint body 1 is an elbow.
4. The pipe joint according to any one of 3 to 3.