JPS5833352Y2 - Cantugate - Google Patents

Description

[Detailed description of the invention] This invention prevents the pipe from rotating in the opposite direction when connecting the pipe to the main body of the pipe joint and connecting other equipment such as a pipe joint to the other end of the protective pipe. The tip of the pipe connected to the pipe fitting body should not come loose or come out even if the pipe is connected to the pipe fitting body, and only three parts, namely an annular backing and a tapered tightening pipe, should be used. The present invention also relates to a pipe joint which is firmly connected by the parts of the tightening nut body, eliminates the risk of water leakage, can be easily assembled, and can be manufactured at low cost.

That is, in the present invention, a stepped mouth portion 4 and an internal thread 5 are provided on the outer inner circumferential side of the hole 2 provided in the pipe joint body 1 from the inside toward the outside, and the stepped opening portion 4 is provided with an inner thread 5. An annular backing 6 is inserted into the opening 4, and a tapered tightening pipe 11 is arranged in the opening 4 with a rough iron film and the inner screw 5 in line with the annular backing 6. A wavy locking protrusion I is provided on the inner circumferential wall of the tapered tightening tube 11, and a tapered portion 8 is provided on the outer circumference of the tapered tightening tube 11 so that the diameter becomes smaller toward the outside of the tapered tightening tube 11. At the same time, non-penetrating grooves 10 are cut into the tapered portion 8 at several locations at appropriate intervals, and grooves 10 are cut into the inner circumference of the tightening nut body 12' on the outer side of the tightening nut body 12'. A tapered portion 14 is formed to have a small diameter in the opposite direction, and a tube holding hole 15 is provided on the inner periphery of the outer end of the tightening nut body 12/, and a tube holding hole 15 is provided on the outer periphery of the outer end of the tightening nut body 12'. Attached nut 12
The outer thread 13 formed on the inner outer periphery of the tightening nut main body 12' is screwed into the inner thread 5 of the pipe joint main body 1, and the tapered part 14 is connected to the tapered tightening pipe 11. The distal end 1 of the tube 17 abuts against the tapered portion 8 of the tube 17.
6 into the tube holding hole 15 of the tightening nut main body 12', the tapered tightening tube 11, and the annular puffing 6 in parallel, and the tip 16 of the tube 17 is inserted into the stepped opening 4.
This refers to a pipe joint in which the pipe 17 is connected to the pipe joint body 1 by tightening the throat body 12, and 3 in the figure is a pipe joint provided in the pipe joint body 1. Shows external thread.

In a conventional pipe fitting of this type, a locking ring having a through-slit groove and a tapered part formed on the inner outer circumference, and a metal ring are arranged sequentially from the distal end of the pipe toward the outer end. a washer, a washer made of rubber or other material, another washer made of metal, and an annular wedge having a through-split groove and a tapered portion formed on the outer circumference; Six parts of a banking nut having a tapered part formed on the inner inner periphery and an external thread provided on the inner outer periphery are inserted, and the inner part of the locking ring located on the inner side is inserted. Insert an inward annular projection provided on the inner circumference into an annular groove formed on the outer circumference near the tip of the tube, and in this state insert the tip of the tube into the through hole of the housing. In addition, a tapered part of the locking ring,
The outer thread of the pin knocking nut is brought into contact with a part of the outwardly expanding taper provided continuously outside the through hole, and
There is a pipe joint in which a pipe is connected to the housing by screwing into and tightening an internal thread provided continuously outside a part of the tapered part that expands outward. When the incoming water hits the tip of the pipe directly, a force moves outward against the iron pipe.
As a result, a pressing force is applied to the washer made of rubber or other materials, increasing the sealing effect, and the number of parts is reduced, making it easier to assemble the parts. It is something.

However, this pipe joint has many drawbacks as shown below.

First, the use of six pieces to connect the tube to the housing is uneconomical, ie, expensive.

Second, since these six parts are used for assembly, assembly is time-consuming, and these six parts must be fitted into the front part of the pipe in advance, and the inward annular protrusion of the locking ring must be inserted into the front part of the pipe in advance. of,
Since the tube is inserted into an annular groove formed on the outer periphery near the tip of the tube, and then inserted into the housing, the tube is connected, making assembly even more time-consuming.

Thirdly, since it is necessary to form an annular groove on the outer periphery of each tube near its tip,
In addition to requiring a lot of effort, forming such an annular groove in the pipe weakens the strength of the iron pipe, which can lead to cracks forming in the pipe from the annular groove and water leakage from this area. It can also cause

Fourthly, the locking ring located at the front end of the pipe and the annular wedge located outward from it both have split grooves, so when the banking nut is tightened, the locking ring The annular wedge cannot tighten the pipe evenly, that is, it will be unidirectional, and the tightening effect will not be good.

Moreover, the inner circumferential surface of the annular wedge that presses the washer made of rubber or other material from the outer part to the inner part via the metal flat washer located on the outer side of the washer is Since the annular wedge is smooth, tightening with the annular wedge has little effect and does not effectively prevent water leakage.Furthermore, in order to prevent water from leaking from the locking ring and the through groove part of the annular wedge, two This necessitated the use of flat metal washers, which led to the increase in the number of parts mentioned above.

Fifth, the water flowing into the pipe from the through-hole of the housing directly hits the tip of the iron pipe, resulting in various drawbacks such as the water not flowing smoothly.

However, since the present invention has the above-mentioned structure, it has been able to eliminate the drawbacks of the conventional products mentioned above.The present invention will now be explained with reference to an example of implementation shown in the attached drawings as follows. It is.

With this invention, the pipe 17 (copper, stainless steel,
When connecting lead pipes, pipes made of metal such as iron and brass, and pipes made of synthetic resin, a stepped opening located inside the internal screw 5 provided on the inner circumference of the hole 2 of the pipe joint body 1 is used. 4, an annular banking 6 is inserted into the annular backing 6, and the annular backing 6 may have a circular, elliptical, or flat cross section. In this case, when it is inserted into the stepped opening 4, it can be inserted smoothly, and when the distal end 16 of the tube 17 is inserted therein, it can also be done smoothly.

Next, a wavy locking protrusion 7 is provided on the inner peripheral wall, and a tapered portion 8 is provided on the outer peripheral portion of the nk-r-per clamping tube 11 so that the diameter of the tapered clamping tube 11 becomes smaller in the outward direction. At the same time, the tapered tightening pipe 11 is formed by cutting non-penetrating grooves 10 in several places in the tapered portion 8 at appropriate intervals, and is disposed within the stepped opening 4 and the internal screw 5. Then, the side opposite to the tapered small diameter end side 9 of the tapered tightening pipe 11,
That is, the base is brought into contact with the annular banking 6, and then the outer thread 13 formed on the inner outer periphery of the tightening nut body 12' is
A tapered portion 14 is screwed into the internal thread 5 of the pipe joint body 1 and formed on the inner inner periphery of the tightening nut body 12' so that the outward direction of the tightening nut body 12' has a smaller diameter. of,
abutting against the tapered portion 8 of the tapered tightening tube 11;
The tip 16 of the tube 1T is inserted in parallel into the tube holding hole 15 provided on the inner periphery of the outer end of the tightening nut body 12', the tapered tightening tube 11, and the annular backing 6, and then By tightening the part of the tightening nut 12 provided on the outer periphery of the throat body 12', the tightening nut body 12'
The outer thread 13 of is screwed into the inner thread 5 of the pipe joint body 1, and therefore, the tapered part 8 of the tapered clamping pipe 11 is screwed into the tapered part 14 of the inner inner periphery of the tightening nut body 12'. In order to tighten the tube 17, the non-penetrating grooves 10 are sandwiched together, and the wavy locking protrusions 7 on the inner circumferential wall of the grooves strongly bite into the outer circumferential surface of the tube 17, thereby tightening the tube 17 into the pipe fitting body 1.
This is to securely connect and hold the

In the present invention as described above, at the other end of the tube 17,
Tapered fasteners that are integrally fixed to the pipe 17 via the wavy locking protrusion 7 even if the constricted pipe 17 is subjected to an action such as being rotated in the opposite direction when connecting other devices such as pipe joints. The tube 11 also rotates in the opposite direction together with the constriction tube 17, but in this case, the taper portion 8 of the tapered tightening tube 11 slides on the surface of the taper portion 14 of the tightening nut body 12' with which the taper portion 8 is in contact. Therefore, there is no risk that the outer thread 13 of the tightening nut body 12' may loosen and come out from the inner thread 5 of the hole 2 of the pipe joint body 1. In other words, in this case, the tightening nut body 12' The inner part of 12' is a tapered tightening pipe 11,
Since it is located between the internal threads 5 of the pipe joint body 1, the tightening nut body 12' will not come loose from the pipe joint body 1 even if the tapered fastening pipe 11 rotates in the opposite direction.

Therefore, the tip end 16 of the tube 17 is connected to the tapered tightening tube 11.
At the same time, it will not come out from the pipe joint body 1.

Furthermore, at this time, the pressure on the annular backing 6 by the tapered tightening tube 11 remains unchanged, so there is no fear of water leakage.

Furthermore, in the present invention, the tip end 16 of the tube 17 is simply arranged in the tube holding hole 15 on the inner circumference of the outer end of the tightening nut main body 12', the stepped opening 4, and the internal thread 5. tube 11
and the annular backings 6 inserted into the stepped openings 4 in parallel, and then tightening the tightening nut 12 part of the tightening nut body 12', the pipe fitting body can be attached very easily. The pipe 17 can be connected to the tube 1, so that the assembly work can be performed efficiently without any trouble.

Furthermore, by simply inserting the annular backing 6 into the stepped opening 4 of the pipe joint body 1, the tip 16 of the tube 1γ can be inserted therein. The tip 16 of the tube 17 is tightly inserted into the
There is no risk of it twisting when inserted into this.

Therefore, when the distal end 16 of the rough pipe 1T is connected to the pipe joint body 1, the distal end 16 of the pipe 17 is first connected so that the distal end a is a tapered tube. It is gripped by the wavy locking protrusion 7 of 11,
Further, the outer part is held by the tube holding hole 15 provided on the inner periphery of the outer end of the tightening nut body 12', and is therefore firmly connected, so that even if the tube 17 is subjected to an impact, Also, since the pipe 17 does not become unstable or loosen, water leakage is completely prevented, and the pipe 17 does not come out from the pipe joint body 1.

Furthermore, in the present invention, a tightening nut body 12' is disposed between the stepped opening 4 of the inner peripheral side of the hole 2 of the pipe joint body 1 and the tapered tightening tube 11 disposed within the internal screw 5. The inner part of the tightening nut body 12' is located, and the outer thread 13 on the inner outer periphery of the tightening nut body 12' is screwed into the inner thread 5 of the hole 2 of the pipe joint body 1. Since the tapered part 14 on the inner circumference of ' is tightened, the tapered part 8 having several non-penetrating grooves 10 of the tapered tightening pipe 11 which is in contact with the tapered part 14 is tightened. Since the nut is tightened evenly without being twisted in one direction, the tightening is strong, and therefore, even if there is vibration or impact on the pipe 17 and the pipe fitting body 1, the tightening nut body 12' remains firmly attached to the pipe fitting body. Since the pipe 17 does not loosen at all from the pipe joint body 1, the pipe 17 does not wobble with respect to the pipe joint body 1, and the constricted pipe 17 does not come out.

As mentioned above, in the present invention, the pipe 1 is attached to the pipe joint body 1.
7, an annular backing 6, a tapered tightening tube 11 having several non-penetrating grooves 10 in its tapered portion 8, and a wavy locking protrusion γ on its inner circumferential wall, and a tightening nut. Only three parts of the main body 12' provide the strongest possible connection and water leakage prevention, making it much cheaper to manufacture than conventional products that use six parts. We were able to provide the optimal pipe fitting.

In the case of assembly, the stepped opening 4 of the pipe joint body 1
The annular backing 6, the iron-filmed opening 4 and the inner screw 5
Next, the outer thread 13 of the tightening nut main body 12' is screwed into the inner thread 5 of the pipe joint main body 1, and the tip end 16 of the pipe 1T is attached to these three parts. Insert and
All that is left to do is to connect the pipes 1γ by simply tightening the tightening nut body 12', so you can fit the six parts into the front part of the pipe in advance like in the conventional product, or insert the locking ring, one of the parts. Unlike the method of connecting tubes by fitting an inward annular projection into an annular groove on the outer circumference of the tube, assembly is extremely easy.

In addition, unlike conventional products, the present invention does not require the formation of an annular groove on the outer periphery near the tip of the tube, so there is no need to take the time required to do so, and by providing the annular groove, the strength of the tube can be increased. There is no risk of weakening or cracking the pipe, leading to water leakage, and in the conventional product, both the locking ring and the annular structure have a split groove through them, so tightening is done in one direction. Although the effect was small, in the present invention, the pipes 17 can be firmly connected by the tapered tightening pipe 11 provided with several non-penetrating grooves 10 and the wavy locking protrusions 7, and the above-mentioned through-split The use of two metal flat washers to prevent water leakage from the grooves is also completely unnecessary with the present invention.

In addition, in the conventional product, water did not flow smoothly because the water hit the tip of the tube, but in the present invention, the inner diameter of the hole 2 deeper than the stepped opening 4 and the inner diameter of the tube 17 Since these substantially match, the water flowing through the hole 2 and the pipe 17 flows smoothly.

Furthermore, in the present invention, the tapered tightening pipe 11 provided with several non-penetrating grooves 10 and wavy locking protrusions 7 allows the pipe to
7 is well prevented from rotating or moving laterally, but even if the iron pipe 1T is reversely rotated, the pipe 17 will not loosen or come off from the pipe joint body 1.

In addition, when removing the tip 16 of the pipe 17 from the pipe joint body 1, it can be easily removed by simply loosening the tightening nut 12.Furthermore, since the structure of the present invention is simple, it can be manufactured at low cost. , which has the advantage of being mass-producible.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention; FIG. 1 is a perspective view of the present invention before it is assembled, and FIG. 2 is a longitudinal sectional side view. 1... Pipe joint body, 2... Hole, 4...
...Stepped opening, 5...Inner screw, 6...
... Annular backing, 7 ... Wave-like locking protrusion,
8...Tapered part, 10...Non-penetrating groove, 11...Tapered tightening pipe, 12...
・Tightening nut, 12'...Tightening nut body, 1
3...Outer screw, 14...Taper part, 15...Tube holding hole, 16...Tube, 1
7 tip.

Claims (1)

[Scope of utility model registration request] A stepped opening 4 and an internal thread 5 are provided in the outer inner circumference side of the hole 2 provided in the pipe joint body 1 from the inside toward the outside. Insert the annular backing 6, and insert the annular backing 6 into the opening 4 with the iron film and the inner screw 5.
A tapered tightening tube 11 is arranged side by side with the knocking 6, and a wavy locking protrusion 7 is provided on the inner circumferential wall of the tapered tightening tube 11.
Further, a tapered portion B is formed on the outer peripheral portion of the tapered tightened tube 11 so that the diameter becomes smaller toward the outside of the tapered tightened tube 11, and a non-penetrating cut groove is formed in the tapered portion 8. 10 at several locations at appropriate intervals to form a tapered portion 14 on the inner inner periphery of the tightening nut body 12/ so that the outer diameter of the tightening nut body 12' becomes smaller. At the same time, the tightening nut body 1
A tube holding hole 15 is provided on the inner periphery of the outer end of the tightening nut body 12', and a portion of the tightening nut 12 is provided on the outer periphery of the outer end of the tightening nut body 12'. The outer screw 13 is screwed into the inner screw 5 of the pipe joint body 1, and the taper portion 14 is brought into contact with the taper portion 8 of the tapered tightening tube 11, so that the tip portion 16 of the tube 17 is The tube holding hole 15 of the tightening nut body 12', the tapered tightening tube 11, and the annular backing 6 are inserted in parallel to each other, and the tip 16 of the tube 17 is brought into contact with the stepped opening 4. and then the pipe 17 is connected to the pipe joint body 1 by tightening the tightening nut body 12'.