JPS6114778Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe joint, and more particularly to a pipe joint mainly used for pipe joints of synthetic resin pipe bodies.

Conventionally, a pipe joint shown in FIG. 8 has been used as a pipe joint for a pipe joint of a synthetic resin pipe body. That is, the conventional pipe joint of this type has a pair of movable bodies 2 in which a movable rod 23 is slidably fitted into a fitting hole 22 formed in a protruding body 21 of a semicircular metal fitting 20.
4, and a fixed rod 27 having an engaging piece 26 that can be engaged with the engaging piece 25 formed at the tip of the movable rod 23 of the movable body 24 is attached to the projecting body 21' of the semicircular metal fitting 20'. As shown in the figure, both ends of the pair of movable bodies 24, 24' are tightened with bolts 29 and nuts 30, and the pair of fixed bodies 28, 28' are Both ends are similarly tightened with bolts 29 and nuts 30, and the movable rods 23,
Both engaging pieces 25, 2 of 23' and fixed rods 27, 27'
6 and is attached to the synthetic resin pipe body.

However, conventional pipe joints of this type have the following serious drawbacks.

(a) In other words, the pipe joint with the above configuration requires a total of 4 semicircular fittings, 2 movable rods and 2 fixed rods, and 4 bolts and nuts, so the number of parts is extremely large. It was getting bigger.

(b) Furthermore, when replacing the pipe body, bolts and nuts must be tightened and removed, which requires tools such as spanners, making the work of replacing the pipe body extremely complicated. .

This invention was developed to eliminate all of the above-mentioned drawbacks, and is completely new and useful as it has a small number of parts, can be easily attached to and removed from the pipe body, and can easily be replaced. The purpose of this invention is to provide a pipe joint that is of excellent quality.

The present invention has been constructed to achieve such an object, and its construction includes a band body 1 having a substantially semi-elliptic shape that can be crimped onto or detached from either the insertion tube 17 or the reception tube 18; 1' top 19, 19'
, connecting rods 8, 8' having locking bodies 9, 9' at their tips are integrally provided, and the band body 1,
The insertion tube 17 or the socket tube 18 is attached to both ends of 1'.
A pair of tightening bands 2, 2' formed with engaging portions that can engage with each other so that both band bodies 1, 1' can rotate freely around the respective ends when externally fitted onto the belt.
and inserting holes 11, 11', into which the connecting rod 8 of one of the tightening bands 2 can be inserted, and which have an inner diameter larger than the outer diameter of the locking body 9 of the connecting rod 8, are bored on one end side,
A notch 1 into which the connecting rod 8' of the other tightening band 2' can be inserted and whose width is narrower than the outer diameter of the locking body 9 of the connecting rod 8'.
3 and 13' are formed on the other end side of the insertion tube 1.
7 or the receiving tube 18, which is removable from the other.
To prevent the pair of semicircular locking bands 10, 10' and the locking body 9 of the one tightening band 2 from slipping out from the insertion holes 11, 11' of the locking bands 10, 10'. It consists of a means to prevent it from slipping out.

Since the present invention is constructed as described above, it has the following remarkable effects.

(a) That is, first, in the state of attachment to the pipe joint, a pair of tightening bands are attached to one tube body by engagement at both ends of the band bodies, and a pair of locking bands The connecting rod of the tightening band is inserted into the insertion hole and notch, and the connecting rod is locked with the locking body at the tip of the connecting rod without coming off, and is attached to the other pipe body, so it cannot be used with conventional bolts and nuts. Compared to pipe fittings that are tightened by hand, it is much easier to attach and detach from the pipe body, and it is also possible to attach them to the pipe body by hand without using any tools such as spanners.

(b) Furthermore, since it consists of a simple structure consisting of only a tightening band with a connecting rod and a locking band, the structure is much simpler than that of conventional pipe joints, and the number of parts can be significantly reduced. I was able to do that.

(c) Furthermore, when the tightening band and the locking band are attached to the tube body as described above, the inner peripheral surface of the band body of the tightening band is crimped to one tube body, so the tightening band is attached to one tube body. The body is securely tightened, so that the tightening band never separates from one tube body.

(d) Furthermore, since the connecting rod does not separate from the insertion hole in the state in which the connecting rod is inserted into the insertion hole of the locking band, the locking band never separates from the other tube body.

EMBODIMENT OF THE INVENTION Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.

1 and 4, reference numerals 1 and 1' are the band bodies of the tightening bands 2 and 2', and the inner circumferential surfaces 3, 3' and outer circumferential surfaces 4, 4' of the top portions 19, 19' are parallel tapered surfaces. The hook piece 7 is formed into a substantially semi-elliptical shape, and has an engaging protrusion 5 formed on the outer circumferential surface of one end and an engaging recess 6 on the other end, and a saw blade 31 is formed on the entire inner circumferential surface. is formed. Reference numerals 8 and 8' denote connecting rods to which hexagonal locking bodies 9 and 9' having an outer diameter l ₁ are attached at the tips, and the tops are attached to the tops of the outer circumferential surfaces 4 and 4' of the band bodies 1 and 1'. They are attached parallel to the inner peripheral surfaces 3, 3' of the bands 19, 19', that is, at a desired obtuse angle with the band body 1.

In FIG. 2, reference numerals 10 and 10' denote semicircular locking bands, each of which has a ring shape at one end with an insertion hole 11, 11' having an inner diameter _l2 larger than the outer diameter _l1 of the locking bodies 9,9'. portions 12, 12' are formed, and a notch 1 is formed at the other end.
3 and 13' are formed.

In FIG. 3, reference numeral 15 indicates a pair of approximately semicircular insertion pieces for preventing the tightening band 2 and the locking band 10 from coming apart; It is formed so that it can be inserted into the insertion holes 11 and 11' of the belt and can be fitted onto the connecting rod 8 of the one tightening band 2.

When using the pipe joint consisting of the band bodies 1, 1', the tightening bands 2, 2' having the connecting rods 8, 8', and the locking bands 10, 10' as in the above embodiment, next time. I will explain about it.

First, after joining the insertion tube 17 and the receiving tube 18, a pair of tightening bands 2, 2' are attached as shown in FIG.
, so that the engaging protrusions 5 at both ends of each band main body 1, 1' engage with the engaging recess 6', and the engaging protrusions 5' engage with the engaging recess 6, respectively, so that the two half circumferential surfaces of the insertion tube 17 are Attach each to the top. Next, the insertion holes 11, 11' of the pair of locking bands 10, 10' are externally inserted into the connecting rod 8 of the one tightening band 2 from the locking body 9 side, and both locking bands 10, 10' are The locking bands 10, 10' are hooked to the connecting rod 8 as shown in FIG. 5 so as to face each other.

Next, the band bodies 1, 1' of the tightening bands 2, 2'
the engaging protrusions 5, 5' and the engaging recesses 6, 6, in the directions of arrows A and B, respectively, in FIG.
Rotate around the engaging part with 6'. The inner peripheral surfaces 3, 3' of the band bodies 1, 1' are the insertion tubes 17.
When the connecting rods 8, 8' come into contact with the inner circumferential surfaces 3, 3', the connecting rods 8, 8' are aligned in advance with the band bodies 1,
1', the band body 1,
When the connecting rod 8,
8' is held parallel to the insertion tube 17.

After that, the unfixed locking band 10,1
The U-shaped portions 14, 14' on the other end of 0' are fitted into the other connecting rod 8' from both sides as shown in FIG. Attach each to the top.

Furthermore, the insertion pieces 15, 15 shown in FIG. 3 are connected to the upper connecting rod 8 and the locking bands 10, 1 as shown in FIG.
0', and drive in and bend both ends of the locking pieces 16 of the insertion pieces 15, 15, and remove the ring-shaped parts 1 of the locking bands 10, 10'.
2, 12'.

In this state, the locking body 9 of one connecting rod 8 can be locked to the insertion pieces 15, 15, and the locking body 9' of the lower connecting rod 8' is connected to the U-shaped portion 14' of the locking band 10'. Therefore, the locking bands 10, 10' of both connecting rods 8, 8' are completely prevented from coming off from the insertion holes 11, 11' and the notches 13, 13'.

A more important point is that this locking band 10,1
0' is attached to the socket tube 18, a pressing force is applied to the band bodies 1, 1' of the tightening bands 2, 2' in the direction of the arrow C in FIG. The inner circumferential surface of the insertion tube 1' is completely pressed onto the oblique circumferential surface of the insertion tube 17. Therefore, the pair of tightening bands 2, 2' can be securely attached to the insertion tube 17 while tightening the insertion tube 17, without causing any displacement or detachment.

As described above, the insertion tube 17 of the pipe joint is made up of the tightening bands 2, 2' and the locking bands 10, 10'.
Attachment to the joint of the socket pipe 18 is completed, and in this state the connecting rods 8, 8'
are the insertion holes 1 of the locking bands 10 and 10', respectively.
1, 11' and notches 13, 13', so even if internal pressure is generated in both the pipe bodies 17, 18 and the pipe bodies move, the pipe joint will respond to this movement. Therefore, it can be expanded and contracted freely, and thus can sufficiently cope with the internal pressure generated in the tube.

Furthermore, even when the pipe joint expands or contracts, the aforementioned tightening bands 2, 2' will ensure that the inserted pipe 1
Since the fastening bands 2 and 2' are attached to the insertion tube 17 on the 7 side, detachment and displacement of the tightening bands 2 and 2' from the insertion tube 17 are completely prevented. Especially the band body 1,
Since a saw blade 31 is formed on the inner peripheral surface of 1',
The above-mentioned detachment and positional shift prevention effect becomes even better.

Furthermore, the tightening bands 2, 2' and the locking band 10,
10' are attached to the insertion tube 17 and the socket tube 18, respectively, and the connecting rods 8, 8' are located on the sides of both tubes, so even when the tubes vibrate in the vertical direction, the tubes are The joint can sufficiently cope with this vertical vibration.

Next, when the above-mentioned pipe joint is to be removed from the insertion tube 17 and the receiving tube 18, all the above-mentioned installation operations can be performed in reverse. In this case, the locking bands 10, 10' are removed by removing the insertion piece 15, removing the connecting rod 8 from the insertion holes 11, 11', and releasing the U-shaped portions 14, 14' from the connecting rod 8. It can be easily removed from the insertion tube 18, and the tightening bands 2, 2' can be easily removed from the insertion tube by disengaging the engagement protrusions 5, 5' and the engagement recesses 6, 6'. It can be removed from 17. Therefore, attachment and detachment of the tightening bands 2, 2' and locking bands 10, 10' to and from the pipe body does not require tools such as spanners, unlike conventional pipe joints, and can be done entirely by hand. It's easy to do.

In the above embodiment, the tightening bands 2, 2'
Engagement protrusions 5,
5' and one engagement recess 6, 6', but the invention is not limited to this, for example, one tightening band 2
It is also possible to form only a pair of engagement projections 5 at both ends of the band body 1 of the other tightening band 2', and to form only a pair of engagement recesses 5' at both ends of the band body 1' of the other tightening band 2'. . Furthermore, the engagement at both ends of the band bodies 1, 1' is not limited to the above-mentioned combination of the engagement protrusion and the engagement recess, but may be a combination of the engagement protrusion and the engagement hole. The point is that engaging portions that can be engaged with each other should be formed at both ends of the band bodies 1, 1' so that the band bodies 1, 1' can rotate freely around these ends. .

Further, in this embodiment, a semicircular insertion piece 5,
5' is inserted between the connecting pipe 8 and the insertion holes 11, 11' of the locking bands 10, 10' to prevent the locking body 9 from coming off from the insertion holes 11, 11'. However, the means for preventing the locking body 9 from coming off is not limited to this.

Furthermore, in this embodiment, the tightening bands 2, 2'
Although the locking bands 10 and 10' are attached to the insertion tube 17 side and the locking bands 10 and 10' to the receiving tube 18 side, it is also possible to attach them in the opposite direction.

[Brief explanation of the drawing]

FIG. 1 is a side view of a tightening band for a pipe joint according to the present invention. FIG. 2 is a side view of the locking band. FIG. 3 is an enlarged side view of the insertion piece. FIG. 4 is a plan view showing how the tightening band is attached to the tube body. FIG. 5 is a plan view showing a state in which the locking band is hooked to the tightening band. 6th
The figure is a partially cutaway side view showing the operation of attaching the locking band to the tube body. FIG. 7 shows the completed state of installation, with A being a partially cutaway plan view and B being a sectional view taken along line A--A of A. FIG. 8 is a front view of a conventional pipe joint in an installed state. 1, 1'... Band body, 2, 2'... Tightening band, 3, 3'... Inner peripheral surface, 5, 5'... Engaging protrusion,
6, 6'...Engaging recess, 8, 8'...Connecting rod, 9,
9'...Latching body, 10,10'...Latching band, 1
1, 11'...insertion hole, 13,13'...notch, 1
7... Insertion tube, 18... Reception tube.

Claims (1)

[Claims for Utility Model Registration] 1. A substantially semi-elliptic band body that can be freely fitted into and removed from either the insertion tube 17 or the socket tube 18 and can be crimped onto the outer peripheral surface of the insertion tube 17 or the socket tube 18. 1,
Engagement parts are formed at both ends of the band bodies 1 and 1' so that the two band bodies 1 and 1' can engage with each other so as to be rotatable, and the top part 1 of the band bodies 1 and 1'
A pair of tightening bands 2, 2' are integrally provided with connecting rods 8, 8' having locking bodies 9, 9 at their tips, and the connecting rod 8 of one of the tightening bands 2 is An insertion hole 11, 1 that can be inserted and has an inner diameter larger than the outer diameter of the locking body 9 of the connecting rod 8.
1' is bored at one end, and the other end has a notch into which the connecting rod 8' of the other tightening band 2' can be inserted and whose width is narrower than the outer diameter of the locking body 9 of the connecting rod 8'. a pair of substantially semicircular locking bodies 10, 10' that can be fitted into or removed from the other of the insertion tube 17 or the socket tube 18, and the one tightening band 2. The locking body 9 is the locking body 1
1. A pipe joint characterized by comprising a slip-off preventing means for preventing the pipe from slipping out from the insertion tubes 11 and 11' of 0 and 10'. 2 Utility model registration claim 1, wherein the engaging parts formed at both ends of the band bodies 1, 1' are an engaging protrusion 5 and an engaging recess 6 that can engage with each other.
Pipe fittings listed in section. 3. The locking member 9 has a pair of retaining means that can be inserted into the insertion holes 11, 11' of the locking bands 10, 10' and fit onto the connecting rod 8 of the one tightening band 2. The pipe joint according to claim 1 or 2, which is a substantially semicircular insertion piece 15.