JPS633511Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pipe joint for connecting two pipes mainly made of synthetic resin.

[Prior Art] Various types of such pipe joints are known. For example, in Japanese Utility Model Publication No. 45-23228, a hose 8 made of a soft material is held between a tapered inner cylinder 5 and a tapered outer cylinder 9, and a tightening screw cylinder 12 that engages with the outer cylinder 9 is disclosed. into the main cylinder 2 which is screwed onto the ring A, and connect the ring A and the hose 8.
A device for connecting the two is shown. This device is suitable for connecting relatively small-diameter, soft-material pipes like the hose 8, but when the pipe is large in diameter, the pipe is inserted into the inner cylinder 5 and then held between the outer cylinders 9. Doing so is complicated and difficult, and is unsuitable for connecting large diameter pipes. If the packing ring 7 is defective, the main cylinder 2
Leakage occurs from the threaded portion between the screw and the tightening screw tube 12.

Further, Japanese Utility Model Application Publication No. 146111/1983 discloses a pipe joint that connects a resin pipe and a nipple using a cap nut. Since this joint simply holds the hose between the nipple and the cap nut (or ring-shaped member), the tightening force at the joint is weak, and the seal is insufficient, so there is a risk of leaks. .

Further, Japanese Utility Model Publication No. 50-27606 discloses a hose fitting in which the ends of two hoses are sandwiched and connected by a socket segment. However, this hose fitting is used only for connecting relatively small diameter and highly flexible pipes such as hoses. When connecting pipes using this fitting, the ends of the two pipes must be aligned so that they are in a straight line, and the socket segments must be joined while maintaining this alignment, making the pipe connection work much easier. It is very complicated and requires skill, especially in the case of large diameter pipes with poor flexibility. In addition, although the socket segment applies a tightening force from the outside to the inside of the hose, there is no member inserted into the ends of the two hoses, so fixation by tightening is not possible. However, there is a problem that leakage may occur.

[Purpose of the invention] The present invention was devised in view of the problems of the prior art described above, and provides a pipe joint that can be easily connected even with large diameter pipes and has good sealing performance. It is intended to.

[Structure of the invention] According to the invention, there is provided a tubular body in which a straight nipple is formed at one end, and two inclined surfaces are formed at the other end so that the longitudinal section thereof forms a chevron. and two semicircular tubes surrounding the upper and lower halves of the straight nipple portion, respectively, and a bolt connecting the two semicircular tubes, and an annular groove is formed on the inner circumferential surface thereof. an inner circumferential surface that engages with the inclined surface on the side closer to the straight nipple portion of the two inclined surfaces, and a flange that loosely fits into the inner surface of the annular groove of the fastener. , and a tightening ring body having a threaded hole formed therein;
It has an inner circumferential surface that engages with the inclined surface on the side remote from the straight nipple portion of the two inclined surfaces, and a threaded portion that engages with the threaded hole of the tightening ring, and the threaded hole is A pipe connection nut is provided.

[Operation and effect of the device] When connecting two hoses using the device having the above configuration, first insert the end of one tube into the straight nipple of the tubular body and tighten it. The bolt connecting the two semicircular tubes of the tool is tightened, and the end of the one tube is tightened and fixed between the straight nipple and the semicircular tube. Next, screw the threaded part of the end of the other pipe into the threaded hole of the pipe connection nut,
Then, the tightening ring is rotated, and the pipe connecting nut is tightened by threading the threaded hole of the tightening ring and the threaded portion of the pipe connecting nut, thereby connecting the tubular body and the other pipe.

Here, even if the one tube has a large diameter, it is easy to insert it into the straight nipple part,
It is also easy to surround the end of the tube into which the straight nipple is inserted with two semicircular tubes, and to firmly connect the two semicircular tubes with bolts. Since the end of the one tube is firmly tightened between the straight nipple portion on the inner side and the semicircular tube on the outer side, the sealing performance is good.

The other end of the tube is easily and securely attached to the tubular body by the aforementioned screw threading. Moreover, by screwing the connecting nut and the tightening ring, the inner circumferential surface of the connecting nut and the inclined surface formed on the tubular body and located far from the straight nipple part engage, and the straight nipple becomes even more straight. Since the inclined surface closer to the nipple portion engages with the inner circumferential surface of the tightening ring, the connection between the end of the pipe and the pipe fitting is reliably sealed.

In this way, by using the pipe joint of the present invention, it is possible to easily and reliably connect two pipes, even if they are large diameter pipes, and the sealing performance of the connection part is also good, preventing leaks. Nothing will happen.

Furthermore, since the flange of the tightening ring body loosely fits into the annular groove of the fastener, the fastener is prevented from falling off from the main body of the pipe joint. Furthermore, before being screwed together with the pipe tightening nut, the tightening ring body and the pipe tightening nut are formed separately from the tubular body, and are rotatable with respect to the tubular body, so that one of the above-mentioned rotating and screwing the straight nipple into the end of the pipe, and rotating the pipe tightening nut to screw the threaded part of the other pipe end into the threaded hole of the pipe tightening nut. Since this is done without mutual interference, the work of connecting pipes becomes easier.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In Fig. 1, a straight nipple part 1 for fitting one tube is formed at one end side (right side in the drawing) of a tubular main body A, and a straight nipple part 1 for fitting one tube is formed at the other end side so that the cross section including the axis forms a chevron shape. two inclined surfaces 12, 13
is formed. That is, straight nipple part 1
The inclined surface closer to the straight nipple portion 1 is indicated by the reference numeral 12, and the inclined surface farther from the straight nipple portion 1 is indicated by the reference numeral 13.
is shown.

A fastener B for tightening the pipe is provided on the outer periphery of the straight nipple portion. Fastener B is the second
As shown in the figure, two semicircular tubes 2 and 3 are connected to brackets 2a, 2b and 3a, respectively.
It consists of a bolt and nut 4 that are connected via 3b. In addition, in the figure, 5 is a circumferential groove formed in the circumferential direction on the inner peripheral surface of both semicircular tubes, and 6 is a horizontal groove formed perpendicular to the circumferential groove 5, both of which ensure tightness when tightening the tube. This prevents it from coming off. An annular groove 8 is formed on the inclined surface 12 side of the semicircular tubes 2 and 3 to loosely engage with a flange 7 formed on a tightening ring body D to be described later.

A tightening ring D is provided on the outer periphery of the inclined surface 12 and has an inner circumferential surface 14 that engages with the inclined surface 12 and is rotatable with respect to the main body A. A screw hole 15 is formed on the inclined surface 13 side. Note that handles 16, 16 for rotational operation are provided protruding from the tightening ring body D, as shown in FIG.

On the other hand, on the opposite side of the main body A from the straight nipple part 1, a pipe connecting nut C is provided to connect the other pipe. A threaded hole 9 is formed on the inner periphery of one side of the pipe connecting nut C to engage a threaded portion (not shown) on the end of the other pipe, and an outer periphery on the opposite side of the threaded hole 9 is formed. A threaded portion 10 is formed to be screwed into a threaded hole 15 of the tightening ring D. The inner circumference of the threaded portion 10 has an inner circumferential surface 11 that engages with the inclined surface 13.
is formed.

When connecting the tubes, one tube is inserted into the straight nipple part 1 and tightened and fixed with a fastener B. This fitting of one of the tubes can be easily carried out even in a large diameter tube by using a fastener B that connects the straight nipple portion 1 and the semicircular tubes 2 and 3 with a bolt/nut 4.
Next, after a threaded portion (not shown) at the end of the other pipe is screwed into the threaded hole 9 of the pipe connecting nut C, the tightening ring D is rotated. This rotation of the tightening ring D moves the pipe connecting nut C to the right to connect the other pipe to the main body A, and the inner circumferential surface 11 engages with the inclined surface 13 to seal this portion. Further, the tightening ring body D itself moves to the left, and the inclined surface 12 and the inner circumferential surface 14 engage with each other to exhibit a sealing action.
prevent it from falling off.

[Summary] As explained above, according to the present invention, large-diameter pipes can be connected easily and reliably, and the sealing performance of the connected portion is improved.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a view taken in the direction of the arrows in FIG. 1, and FIG. 3 is a view taken in the direction of the arrows in FIG. 1. A...Body, B...Tightening tool, C...Pipe connection nut, D...Tightening ring, 1...Straight nipple part, 2, 3...Semicircular tube, 4...Bolt/nut ,
5... Circumferential groove, 6... Horizontal groove, 7... Flange, 8...
...Annular groove, 9...Threaded hole, 10...Threaded part, 1
1, 14... Inner peripheral surface, 12, 13... Inclined surface, 1
5...Screw hole, 16...Handle.

Claims (1)

[Scope of utility model registration request] A straight nipple part is formed on one end side,
2 on the other end side so that its longitudinal section forms a mountain shape.
a tubular body formed with two inclined surfaces, two semicircular tubes surrounding the upper and lower halves of the slate nipple part, and a bolt connecting the two semicircular tubes; and a fastener having an annular groove formed on its inner circumferential surface, an inner circumferential surface that engages with the inclined surface on the side closer to the straight nipple portion of the two inclined surfaces, and an annular groove of the fastener. a tightening ring body having a flange that loosely fits into the inner surface of the ring body and having a threaded hole formed therein; and a tightening ring body that engages with the sloped surface on the side remote from the straight nipple portion of the two sloped surfaces. 1. A pipe joint, comprising: an inner circumferential surface; a pipe connecting nut having a threaded portion that engages with the threaded hole of the tightening ring; and a threaded hole formed therein.