JP2538442Y2 - Pipe joint structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint structure, and more particularly, to a pipe joint structure applied when various pipes are linked.

[0002]

2. Description of the Related Art Conventionally, as a pipe joint structure of this kind, there is a device disclosed in Japanese Utility Model Laid-Open No. 24990/1985.

[0003] That is, in this conventional device, as shown in FIG. 6, a female screw portion 12 is formed on the inner peripheral surface of one end portion of a joint main body 1b in which a packing 4a is installed, and a ring-shaped push screw body 13 is formed thereon. By screwing, the female screw portion 1 of the joint body 1b
The rear surface of the ring-shaped chip 14 set in a state of being inwardly urged into the screw hole 2 is tapered to the tapered surface 15 of the set screw body 13.
And the cutting edges 16, 16 formed on the inner peripheral edges of both ends of the tip 14 are cut into the outer peripheral surface of the tubular body C, so that the tubular body C
Are connected.

[0004]

However, in the prior art, the push screw 13 is connected to the female thread 1 of the joint body 1b.
2 is screwed into the fitting body 1
When the screw body 13 is set in a state of being misaligned with respect to b, or when the tube C itself is deformed or the like, the screw 13 cannot be screwed to the end. As a result, the tip 14 cannot be sufficiently pressed, so that the packing 4a does not perform the sealing function, causing the leakage of the fluid or the tube C to come out. Especially,
When the pipe C is made of cast iron, the outer peripheral surface is in a so-called black scale state that is not processed, so that such inconvenience is likely to occur.

Moreover, the screwing operation of the push screw body 13 is extremely complicated, and the thread cutting work of the push screw body 13 and the joint body 1a is also troublesome, resulting in a problem that the cost is remarkably increased. is there.

SUMMARY OF THE INVENTION Therefore, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a pipe joint structure which can easily and surely connect pipes and is easily manufactured. And

[0007]

That is, in order to solve the above-mentioned problems, the present invention relates to a pipe joint structure in which a pipe is inserted and connected to a joint body 1 in which a packing 4 is provided inside an opening 1a. And a ring-shaped pressing member 9 for pressing a ring-shaped or partially-notched ring-shaped ring member 7 having an inward elastic force on an inner wall 9a in a groove 8 provided on the outer peripheral surface of the tube body.
Is inserted between the pipe body and the joint body 1 from the pipe body side. Further, the joint body 1 is provided with a screw hole 6 inclined toward the center of the joint body 1, and the screw hole 6 is fastened to the screw hole 6. The attachment body 11 is screwed in and the tip end thereof is engaged with the notch 10 provided on the outer peripheral surface of the pressing body 9, thereby moving the pressing body 9 toward the joint body 1 and pressing the packing 4. This is a pipe joint structure configured to be able to be used.

[0008]

Therefore, in the pipe joint structure characterized by the above-described structure, first, the pipe is inserted into the joint body 1 and set, and then the pressing body 9 inserted into the pipe is connected to the pipe and the joint body. Press between the 1 to insert.

In this case, even if the pipe body and the joint body 1 are set in a state where they are misaligned, the pressing body 9
When the tube is thin, the tube can be connected straight to the joint body 1 while correcting its deformation and the like.

[0010] Thereafter, the fastening body 1 is inserted into the screw hole 6 of the joint body 1.
When the screw 1 is screwed in, the distal end of the tightening body 11 engages with the notch 10 of the pressing body 9 and the pressing body 9 moves to the joint body 1 side,
The tip inner wall 9a engages with the ring body,
The packing 4 is pressed to seal.
Further, since the pressing body 9 is fixed by the fastening body 11, it is possible to prevent the tube body from being unintentionally pulled out, and the tube body and the joint body 1 can be securely and firmly connected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes an annular joint body which is externally fitted to the joining ends of stainless steel tubes A and B, and tubes A and B are inner peripheral surfaces of the joint body 1. A packing 4 and a packing 4 are partially inserted into annular recesses 3 provided on both sides of the annular projection 2 and pressed against the annular projections 2 provided at substantially central portions thereof. The movable bodies 5 are mounted in this order to seal the pipes A and B and the joint body 1. Reference numeral 6 denotes a plurality of screw holes formed on the outer peripheral surface on the distal end side of the joint main body 1 so as to be inclined toward the center side of the joint main body 1, and provided at predetermined intervals in the circumferential direction.

Reference numeral 7 denotes a ring-shaped expandable / contractible ring body, in which a resilient force is applied inwardly to a groove 8 provided on the outer peripheral surface on the distal end side of each of the pipes A and B, that is, the ring body 7 is expanded. It is attached in a state.

Reference numeral 9 denotes a fitting which is fitted between the joint body 1 and the pipes A and B to press the ring body 7 on the inner wall 9a, and to hold the packing 4 via the movable body 5 at one end and the convex portion 9b. A pressing body for pressing the inner wall 9a as shown in FIG.
Are formed in a tapered shape having a width narrower toward the distal end so as to be able to engage with the ring body 7, and notches 10 are provided on the outer peripheral surface at predetermined intervals in the circumferential direction. 9c is provided with a protruding portion 9d facing the joint body 1 and capable of externally fitting the tip of the joint body 1 to the outside. The inner diameter of the pressing body 9 is formed to be slightly larger than the outer diameter of the tubes A and B.

Reference numeral 11 denotes a tightening member screwed into the screw hole 6 of the joint body 1, and the tip end thereof is engaged with the notch 10 of the pressing member 9. A hexagonal hole (not shown) is provided on the head of the tightening body 11.
The head of the fastening body 11 is set to be flush with the outer peripheral surface of the joint body 1 when the fastening body 11 is fastened.

The present embodiment has the above configuration.
When connecting the pipes A and B to the joint body 1, first, the ring body 7 is mounted in the groove 8 of the pipes A and B. In this case, the ring body 7 can be reliably set in the groove 8 of the tube bodies A and B while being pressed inward by the elastic force of the ring body 7.

On the other hand, a packing 4 and a movable body 5 are mounted in the joint body 1. Next, the pipes A and B are connected to the joint body 1.
The pressing body 9 is pressed toward the joint body 1 and inserted between the two while the outer body is fitted on the inner surface of the pressing body 9 even if the tubes A and B are deformed. Thus, even if the tubes A and B are externally fitted to the joint body 1 in a state of misalignment, the misalignment can be corrected while correcting such deformation.

When the tightening body 11 is screwed into the screw hole 6 of the joint body 1 as shown in FIG. 3, the pressing body 9 is engaged with the notch 10 of the pressing body 9 and moves toward the joint body 1. Will be done. As a result, the ring body 7 is reliably pressed by the tapered surface of the inner wall 9 a at the tip of the pressing body 9, and the packing 4 receives a certain pressing force via the movable body 5 and the pipe body and the joint body 1 Is reliably achieved.

Further, the engagement of the fastening body 11 with the notch 10 prevents the pressing body 9 from coming off, and the inwardly elastic ring body 7 comes off from the groove 8 of the tubular body. Therefore, the ring members 7 prevent the tubes A and B from being pulled out, and the two tubes A and B can be reliably and firmly connected.

The two can be connected by such a simple operation and the disassembly thereof can be easily performed, which greatly contributes to maintenance such as maintenance and inspection.

Further, even when the thickness of both ends of the joint body 1 is thin, since the outer ends of the two ends are held by the pressing body 9, the advantage that the weakness of the strength can be compensated for is obtained. is there.

Further, since the pipe joint structure having the above-mentioned structure has a very simple structure, there is an advantage that the tube joint structure can be easily and inexpensively manufactured.

The shape of the notch 10 provided on the outer peripheral surface of the pressing body 9 is not limited to the embodiment. In short, the tip of the tightening body 11 screwed into the screw hole 6 of the joint body 1 engages, the pressing body 9 moves to the joint body 1 side, and the packing 4 can be pressed by the pressing body 9. Any shape is acceptable.

In the above embodiment, the plurality of cutouts 10 are provided at predetermined intervals on the outer peripheral surface of the pressing body 7. However, the cutouts 10 may be provided over the entire circumference. Is not a question.

Further, the number of screw holes 6 provided in the joint body 1 is not limited, and can be changed to an appropriate number according to the configuration of the notch 10 and the diameter of the pipe to be connected.

The pipes A and B to be connected are not limited to those made of stainless steel, but can be applied to pipes made of cast iron or the like whose outer peripheral surface is black-skinned. The specific material, material, etc. are not limited.

Further, in this embodiment, the ring body 7 is formed in a ring shape, but it is needless to say that the ring body 7 may be formed in a partially notched ring shape as shown in FIG.

In the above embodiment, the inner wall 9a of the pressing body 9
Is formed in a tapered shape, but the present invention is not limited to this. For example, as shown in FIG. 4, it may be formed in an arc shape that can be fitted to the outer surface of the ring body 7. The point is that the ring body 7 may be pressed by the inner wall 9a of the pressing body 9.

In addition, specific configurations such as the shapes of the joint body 1, the packing 4 and the pressing body 9 can be freely changed within the range intended by the present invention.

[0030]

[Effect of the Invention] As described above, since the present invention inserts the pressing body between the joint body and the pipe body, even if the pipe body is set in the joint body in an off-center state, When the pressing body is inserted, the inner peripheral surface of the pressing body is inserted while the misalignment of the tubular body is corrected, and particularly when the tubular body is thin, even if the tubular body is deformed or the like. The pressing body can be inserted while this deformation or the like is corrected.

Therefore, the pipe body is not accidentally pulled out of the joint main body due to being connected with the pipe being misaligned as in the prior art, and the pipe body has an inward elastic force in the groove of the joint main body. A special effect is obtained in that the tube body can be securely and firmly connected by the ring body mounted.

Further, the distal end of the tightening body screwed into the screw hole of the joint body engages with the notch of the pressing body, and the pressing body moves to the joint body side to press the packing by the pressing body. As a result, there is an effect that a reliable seal can be achieved without leakage of the fluid from the connecting portion.

Further, unlike the conventional one, the structure is such that the pressing body is inserted as described above, so that a series of connecting work becomes extremely easy, and the manufacturing is simple and inexpensive. Also plays.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part showing a connection state between a pipe and a joint body.

FIG. 3 is an enlarged sectional view of a main part showing a connection state between a pipe and a joint body.

FIG. 4 is a front view showing a partially notched ring body.

FIG. 5 is an enlarged sectional view of a main part showing another embodiment of the pressing body.

FIG. 6 is an enlarged sectional view of a main part showing a conventional example.

[Explanation of symbols]

 A: Pipe B: Pipe 1 ... Joint body 4 ... Packing 6 ... Screw hole 7 ... Ring body 8 ... Groove 9 ... Pressing body 9a ... Inner wall 9c ... Flange 9d ... Protrusion 10 ... Notch 11 ... Clamping body

Claims (5)

(57) [Scope of request for utility model registration] 1. A pipe joint structure in which a pipe is fitted and connected to a joint body 1 in which a packing 4 is provided in an opening 1a, and a ring-shaped groove is formed in an outer peripheral surface of the pipe. Alternatively, a ring-shaped pressing body 9 is inserted between the tubular body and the joint body 1 from the tubular body side so as to press the ring body 7 having a partially cut-out ring shape and having an inward elastic force on the inner wall 9a, In addition, the joint body 1 is provided with a screw hole 6 inclined toward the center of the joint body 1, and a tightening body 11 is screwed into the screw hole 6 so that the tip of the screw body 6 is formed on the outer periphery of the pressing body 9. A pipe joint structure, characterized in that the pressing body 9 is moved toward the joint body 1 to press the packing 4 by engaging a notch 10 provided on the surface. 2. The pipe joint structure according to claim 1, wherein the inner wall 9a of the pressing body 9 is formed in a tapered shape having a width narrower toward the distal end. 3. A ring member 7 is provided on an inner wall 9a of the pressing member 9.
2. An arc-shaped portion capable of being fitted is formed on the outer surface of the slab.
The pipe joint structure according to the above. 4. The pipe joint structure according to claim 1, wherein an annular movable body 5 is interposed between said packing 4 and said pressing body 9. 5. A flange 9c is provided at the other end of the pressing body 9, and a protrusion 9d which is fitted to an end of the joint body 1 protrudes toward the joint body 1 on the flange 9c. The pipe joint structure according to claim 1, wherein the pipe joint structure is provided.