JPH0592589U - Pipe joint structure - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to enable easy and reliable connection of pipes. [Structure] When connecting the pipe bodies A and B, a ring-shaped or partially cutout is formed in a groove portion 6 formed on an outer peripheral surface of the pipe body so that the joint main body 1 is externally fitted and connected to at least one pipe body. The ring-shaped first ring body 5 having an inward elastic force is attached, and the ring-shaped pressing body 7 for pressing the first ring body 5 with the inner wall 7a is connected to the outer peripheral surface of the pipe body and the joint body 1 In the tubular joint structure that is mounted between the inner peripheral surfaces of the
In order to prevent the joint body 1 from being disengaged from the joint body 1, a tightening body 9 is tightened in a screw hole 8 formed in the pressing body 7, and its tip end is brought into contact with the peripheral surface of the joint body 1. Is characterized by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint structure, and more particularly, to an improvement of a pipe joint structure applied when connecting various pipe bodies.

[0002]

[Prior Art]

 Conventionally, as this kind of pipe joint structure, for example, there is one as shown in FIG.

That is, in this conventional one, a ring body 23 having an elastic force is attached to a groove 6a formed on the outer peripheral surface of one end of the tubular body C, and the ring body 23 is provided with an inner wall 24a of an annular pressing body 24. Thus, the pressing body 24 is inserted and attached between the pipe body C inserted into the joint body 1a and the joint body 1a to be pressed.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, since the pressing body 24 needs to be inserted and attached while maintaining the state where the pipe body C is inserted into the joint body 1a at the time of connecting the pipe body C, the work becomes extremely complicated. At the same time, there is a fatal problem that the pressing body 24 is easily inserted in a state where the pipe body C is misaligned with the joint body 1a, and as a result, fluid leaks from the connecting portion.

Further, the ring body 23 may be mounted in a state of floating from the groove portion 6a of the pipe body C or may float when the pipe body is inserted. In such a case, the pressing body 24 may be inserted and attached. However, there was also the inconvenience that this rising could not be corrected, and therefore the tubular body C moved back and forth in the axial direction.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to make it possible to connect the pipes easily and surely.

[0007]

[Means for Solving the Problems]

 That is, in order to solve the above-mentioned problems, the present invention is formed on the outer peripheral surface of the pipe body so that at the time of connecting the pipe body A and the pipe body B, the joint body 1 is externally fitted and connected to at least one pipe body. A ring-shaped pressing body 7 in which a ring-shaped or partially-notched ring-shaped first ring body 5 having an inward elastic force is attached to the groove 6 and which presses the first ring body 5 with the inner wall 7a In a pipe joint structure in which is mounted between the outer peripheral surface of the pipe body and the inner peripheral surface of the joint body 1, in order to prevent the pressing body 7 from separating from the joint body 1, This is a tubular joint structure in which a tightening body 9 is tightened in the drilled screw hole 8 and the tip end thereof is brought into contact with the peripheral surface of the joint body 1.

[0008]

[Action]

 Therefore, in the pipe joint structure characterized by the above configuration, first, the first ring body 5 is mounted in the groove portion 6 of the pipe body, and the pressing body 7 inserted into the pipe body is moved to the groove portion 6 side. The first ring body 5 is moved to press the first ring body 5 with its inner wall 7a, and the tightening body 9 screwed into the screw hole 8 of the pressing body 7 is tightened. As a result, with the first ring body 5 securely attached to the groove portion 6 of the tubular body, the tip of the tightening body 9 comes into contact with the circumferential surface of the tubular body and the pressing body 7 is fixed to the tubular body. The Rukoto.

Therefore, since the pipe body can be attached to the joint body 1 with the pressing body 7 thus set, the work can be performed very easily, and the pressing body 7 serves as a guide. Therefore, the pipe body can be attached straight to the joint body 1 without being misaligned.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 3, reference numeral 1 is an annular joint body externally fitted to the joint ends of the stainless steel pipe bodies A and B, and the pipe bodies A and B are inner peripheral surfaces of the joint body 1. It is inserted up to the vicinity of the convex portion 2 protruding in the substantially central portion, and packings 4 having partial cutouts are attached to the concave portions 3 formed on both sides of the convex portion 2, respectively, so that each tubular body A, A seal between B and the joint body 1 is provided.

Reference numeral 5 denotes a ring-shaped expandable / contractible first ring body, which is a state in which an elastic force is applied inwardly to a groove portion 6 circumferentially provided on the outer peripheral surface of the distal end side of each tubular body A, B, that is, the first ring body. 5 is attached in an expanded state.

Reference numeral 7 denotes a pressing body that is mounted between the joint body 1 and the pipe body to press the first ring body 5 with the inner wall 7a. As shown in FIG. It is formed in a tapered shape so that it can be engaged with, and a tightening body 9 is tightened in a screw hole 8 formed in the other end, and its tip end is pressed against the outer peripheral surface of the pipe body. It comes into contact in the state. A plurality of notch surfaces 10 are formed on the outer peripheral surface of the pressing body 7 on the front end side at predetermined intervals in the circumferential direction.

When the pressing body 7 is mounted at a desired position, its rear end face is dimensioned so as to be flush with the rear end face of the joint body 1, and the inner diameter of the pressing body 7 is set to the tubular body A. , B are formed to have a size slightly larger than the outer diameter.

A plurality of screw holes 11 are formed in the joint body 1 at predetermined intervals with an inclination angle orthogonal to the inclination angle of the cutout surface 10 of the pressing body 7 mounted on the joint body 1. The front end of the tightening body 12 screwed into the abutment is in contact with the notch surface 10 of the pressing body 7. A hexagonal hole 13 is provided in the head of the tightening body 12.

In FIG. 3, reference numeral 14 denotes an annular recess formed in the inner peripheral surface of the joint body 1 on the end side, and a plurality of through holes 15 communicating with the annular recess 14 are arranged at predetermined intervals in the radial direction. It has been drilled. Reference numeral 16 is a partially cut-out second ring body as shown in FIG. 4, and a confirmation and drawing piece 18 made of thin-walled aluminum is fixed near the cut-out portion 17, and its tip end portion is fixed. Is bare from the joint body 1.

In order to be able to insert the second ring body 16 between the joint body 1 and the pressing body 7, a space portion 19 formed between the inner peripheral surface of the joint body 1 and the outer peripheral surface of the pressing body 7 is inserted. The width L is formed to be larger than the axial diameter L'of the second ring body 16, and the inserted second ring body 16 is outwardly resiliently received in the annular recess 14 of the joint body 1. It is fitted and mounted, and engages with the end of the pressing body 7 to prevent its disengagement.

Although this embodiment has the above-described structure, when connecting the respective pipe bodies A and B and the joint body 1, first the first ring body 5 is inserted into the pipe bodies A and B. Fit it into the groove 6.

Then, in order to press the first ring body 5 with the inner wall 7a of the pressing body 7, the pressing body 7 inserted into the pipe bodies A and B is moved, and in this state, the screw hole 8 of the pressing body 7 is inserted. Tighten the tightening body 9. As a result, the tip end of the tightening body 9 comes into contact with the peripheral surfaces of the pipe bodies A and B in a pressed state, and the pressing body 7 is fixed to the pipe bodies A and B. As a result, the pressing body 7 will not rotate in the circumferential direction, and the lifting and movement of the first ring body 5 can be completely prevented.

Next, the pipes A and B are inserted into the joint body 1, but since the pressing bodies 7 are fixed to the pipes A and B, respectively, as described above, such insertion work is not complicated. It is extremely easy to carry out, and since the pressing body 7 plays a guiding role, the pipe bodies A and B can be mounted on the joint body 1 without misalignment.

If the pressing body 7 is inserted at a desired position, the rear end surface of the pressing body 7 is dimensioned so as to be flush with the rear end surface of the joint body 1. Easy to do by hand.

Next, when the tightening body 12 is screwed into the screw hole 11 of the joint body 1, the tip end thereof comes into contact with the notch surface 10 of the pressing body 7. In this case, even if the pipes A and B are not inserted to the desired positions, the screw holes 11 are inclined inward of the joint body 1, so that the tightening body 12 is screwed in. It is possible to move the pressing body 7 to the inside of the joint body 1, whereby the tubular bodies A and B can be inserted to the desired position via the pressing body 7.

As a result, movement and separation of the pipes A and B from the joint body 1 are prevented, so that the pipes A and B can be reliably and firmly connected to each other, and the flow from the connection portion can be prevented. The body does not leak.

Next, when the second ring body 16 is contracted, it is inserted from the space portion 19 and the contracted state is released at the inner position of the annular recess 14 of the joint body 1, the second ring body 16 is released. It is expanded and fitted in the annular recess 14 in a biased state. This mounting state can be confirmed by the confirmation of the second ring body 16 and the bare amount of the pull-out piece 18.

In this case, the second ring body 16 engages with the end portion of the pressing body 7, so that the pressing body 7 and the fastening body 12 are prevented from being separated from each other twice. Moreover, since the second ring body 16 has a partially cut-out ring shape, it can engage with the pressing body 7 over substantially the entire circumference when it is mounted in the annular recess 16 and thus can exhibit an excellent separation prevention effect. Of.

As described above, the work of connecting the two pipe bodies A and B can be performed very easily and quickly.

On the other hand, when the pipes A and B are to be detached from the joint body 1 and disassembled in order to replace the packing 4 and the first ring body 5, for example, first, as shown in FIG. When the rod-shaped body 20 is inserted into the through hole 15 from the outside and the second ring body 16 is pressed, and in this state, the confirmation and extraction piece 18 is pulled outward, the annular recess 14 of the joint body 1 and the second ring body 16 are pulled. The second ring body 16 can be easily removed by partially canceling the fitted state with and performing the same work for the other through holes 15.

Next, if the tightening body 12 is unscrewed from the screw hole 11 of the joint body 1, the pipe bodies A and B can be removed from the joint body 1, and the packing 4 and the first ring body 5 are replaced. And other repairs and refurbishment work can be done easily.

Since the tubular joint structure having the above-described structure has an extremely simple structure, it has an advantage that it can be manufactured easily and inexpensively.

In the above embodiment, the tip of the tightening body 12 screwed into the screw hole 11 of the joint body 1 is brought into contact with the notch surface 10 of the pressing body 7 to release the pressing body 7. However, such disengagement prevention means is not necessarily provided, and the notch surface 10 and the tightening body 12 of the pressing body 7 may be omitted as shown in FIGS. 5 and 6, for example.

This pipe joint structure is mainly applied when the diameter of the pipe is relatively small, but the screw hole 21 is formed in the end portion radial direction of the joint body 1 as shown by the alternate long and short dash line. When the tightening body 22 is screwed into the screw hole 21 as shown in FIG. 5 (a) after mounting the pipes A and B, the pressing body 7 is located inside the joint body 1 on the side surface of the tightening body 22. Since it moves by being pressed, the pressing body 7 can be mounted at a desired position.

Further, when the tightening body 22 is further screwed in and the end of the tightening body 22 is tightened so as to contact the peripheral surface of the pressing body 7, the pressing body 7 is detached and rotated in the circumferential direction. Will be blocked.

If the second ring body 16 is mounted in the annular recess 14 of the joint body 1 so that the tightening body 22 is located at the cutout portion 17 of the second ring body 16, the second ring is formed. It can also prevent the body 16 from rotating in the circumferential direction.

In addition, in this embodiment, the rear end surface of the joint body 1 is flush with the rear end surface of the joint body 1 so that the mounting state of the press body 7 can be confirmed from the outside. The end surface may protrude from the joint body 1 by a predetermined dimension.

Further, in the above embodiment, the through hole 15 communicating with the annular recess 14 of the joint body 1 is provided and the confirmation / pull-out piece 18 is attached to the second ring body 16, but these need not necessarily be provided. Well, it may be provided if necessary. When the through hole 15 is provided, for example, if it is formed in the shape of a long hole, one through hole 15 can be used, and the specific number thereof does not matter.

Further, the pipes A and B to be connected are not limited to those made of stainless steel, but can of course be applied to pipes made of cast iron or the like, and the specific material of the pipes does not matter. ..

Further, although the first ring body 5 is formed in a ring shape in this embodiment, it may be formed in a partially cutout ring shape, and the second ring body 16 has at least a partially cutout ring. The second ring body 16 does not necessarily have to be provided, but may be provided if necessary.

In addition, the specific configurations such as the shape of the joint body 1 can be arbitrarily changed in design within the scope intended by the present invention.

[0039]

[Effect of the device]

 As described above, according to the present invention, since the pressing body and the pipe body are fixed by the tightening body that is fastened to the screw hole of the pressing body, the pressing body rotates in the circumferential direction with respect to the pipe body. It does not move or moves in the axial direction and the first ring body mounted in the groove of the tubular body is pressed by the inner wall of the pressing body, so that the first ring body does not float up from the groove portion. It is possible to maintain a reliable wearing state.

Therefore, the tubular body does not move back and forth in the axial direction, and when the tubular body is inserted into the joint body, the pressing body and the like do not move carelessly. Since it is extremely simple and the pressing body plays a role of a guide, the pipe body is connected to the joint body with the core misaligned as in the conventional case, and the fluid leaks from the connecting portion. It has come to obtain a special effect of eliminating inconvenience.

Further, as described above, the present invention has an extremely simple structure, and therefore has a practical effect that a series of assembling and disassembling operations can be easily performed.

[Brief description of drawings]

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

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged sectional view of an essential part showing a connected state of a pipe body and a joint body.

FIG. 4 is a front view of a second ring body.

FIG. 5 shows another embodiment, (a) is a half-cut sectional view of the pipe joint structure, and (b) is a sectional side view of the same portion.

FIG. 6 is an enlarged cross-sectional view of a main part showing another embodiment.

FIG. 7 is an enlarged cross-sectional view of an essential part showing a conventional connected state of pipes.

[Explanation of symbols]

 A ... Tubular body B ... Tubular body 1 ... Joint body 5 ... First ring body 6 ... Groove portion 7 ... Pressing body 7a ... Inner wall 8 ... Screw hole 9 ... Tightening body 10 ... Notch surface 11 ... Screw hole 12 ... Tightening body 14 ... Annular recess 15 ... Through hole 16 ... Second ring body 17 ... Notch 18 ... Confirmation and extraction piece 19 ... Space 21 ... Screw hole 22 ... Tightening body

Claims (8)

[Scope of utility model registration request] 1. When connecting the pipe body A and the pipe body B, in order to fit the joint body 1 to at least one pipe body by external fitting, the groove portion 6 formed on the outer peripheral surface of the pipe body is formed into a ring shape or a groove. First ring body 5 having a notched ring shape and having an inward elastic force
And a ring-shaped pressing body 7 that presses the first ring body 5 with the inner wall 7a between the outer peripheral surface of the pipe body and the inner peripheral surface of the joint body 1. In order to prevent the pressing body 7 and the joint body 1 from coming off, the pressing body 7
A tubular joint structure, characterized in that a tightening body (9) is fastened to a screw hole (8) drilled in (3), and the tip of the tightening body (9) is brought into contact with the peripheral surface of the joint body (1). 2. A ring-shaped second ring body 16 having an outward elastic force and at least a partial notch is formed in an annular recess 14 formed on the rear side of the inner peripheral surface of the joint body 1. The fitting member is fitted to prevent the pressing body 7 from coming off.
The pipe joint structure described. 3. The notch portion 17 of the pressing body 7 is provided on the joint body 1.
The pipe joint structure according to claim 1 or 2, wherein a screw hole (21) capable of screwing a tightening body (22) inserted through is formed in a radial direction. 4. The joint body 1 is provided with a screw hole 11 that is inclined inward, and a tightening body 12 is provided in the screw hole 11.
And a tip end portion thereof has an inclination angle orthogonal to the inclination angle of the screw hole 11 and can be brought into contact with the notch surface 10 formed on the outer peripheral surface of the pressing body 7. Items 1 to 3
The tubular joint structure according to any one of 1. 5. The pipe joint structure according to claim 1, wherein the joint body 1 is provided with at least one or more through holes 15 communicating with the annular recess 14 in the radial direction. 6. The second ring body 16 includes the second ring body 16.
A confirmation and pull-out piece (18), which is exposed outside the joint body (1) when the (16) is mounted in the annular recess (14), is fixed at one end to the second ring body (16). The pipe joint structure described. 7. The space portion 19 formed between the outer peripheral surface of the rear end portion of the pressing body 7 and the inner peripheral surface of the joint body 1 comprises a second ring body 16
The tubular body joint structure according to any one of claims 1 to 6, wherein the tubular body joint structure is formed in a size such that it can be inserted. 8. A structure in which the rear end surface of the pressing body 7 is at least flush with or protrudes from the rear end surface of the pressing body 7 when the pressing body 7 is mounted on the joint body 1. The tubular joint structure according to any one of 1.