JPS646472Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a bent pipe joint used in a bent part of a water pipe or other conduit, and more specifically, to a joint for fitting a pair of bent pipes together. The present invention relates to an angle adjustment means for a so-called combination bent pipe joint in which a socket part and an insertion part are given curvature.

[Prior Art] As a prior art of this type of joint, for example, there is a "free angle curved pipe" disclosed in Japanese Utility Model Application Publication No. 55-9908.
In other words, the prior art discloses that "the tube axis is curved in an arc shape and consists of a single outer curved tube and a single inner curved tube that are slidably fitted to each other, and is located on the inner surface of the fitted end of the single outer curved tube. A sealing material that fits externally on the inner curved tube alone is provided, an insertion hole with a smaller diameter than the middle part of the outer curved tube alone is provided at the non-fitting end of the outer curved tube alone, and a sealing material is provided at the unfitted end of the inner curved tube alone. It adopts a configuration with a socket.

However, in this prior art, when adjusting the angle of the curved pipe, there is no special device for sliding, and the angle cannot be adjusted accurately.
If the curved pipe has a large diameter, it will be difficult to slide, and the center of curvature of the curved pipe will be located far away from the curved pipe, making it unsuitable for use in steeply curved sections. Therefore, there are various disadvantages such as an increase in the space occupied by the curved pipe.

In addition, a mechanism for rotating the bent pipes was developed in 1973.
Although disclosed in Japanese Patent No. 20548, this known technique requires mechanical power and has a complicated mechanism, making it unsuitable for things such as water pipes.

[Problems to be solved by the invention] Therefore, in view of the above-mentioned circumstances, the present invention provides a new combination bent pipe joint that eliminates the drawbacks of the above-mentioned prior art. The purpose (technical problem) is to be able to take a bending angle and to adjust the angle accurately and easily.

[Means for Solving the Problems] In order to achieve the above object, the combination bent pipe joint of the present invention adopts the following configuration (technical means). One bent tube 1 of the pair of bent tubes 1 and 2 to be combined is formed with a bent insertion portion 11 having a curvature at least at one end, and the bent insertion portion 11 is formed in the other bent tube 2. A curved socket part 21 having the same curvature as the curved socket part 11 which is movably housed is formed, and reaction force receiving members 12 and 22 are provided on the outside in the bending direction of both the curved pipes 1 and 2, respectively. is fixed, one end of the bolt rod 31 is swingably supported on one reaction force receiving member 12, and the bolt rod 31 is pivotally supported on the other reaction force receiving member 22.
The bridge member 33 is swingably attached by loosely fitting the threaded portion 312 of the bolt rod 31 into the threaded portion 312 of the bolt rod 31.
12 has an inner nut 32 with the bridge member 33 in between.
1 and an outer nut 322 are screwed into each of the bent pipes 1 and 2, and on the inside in the bending direction, each of the bent pipes 1 and 2 has a
Arm members 13 and 2 projecting from each other near the center of curvature
3, and a pin member is interposed between the arm members 13 and 23.

[Function] To increase the bending angle, use the inner nut 32.
1 is brought into contact with the bridge member 33 and tightened. The thrust of the nut 321 is transmitted to the reaction force receiving member 22 via the bridge member 33, and the bent pipe 2 integrated with the reaction force receiving member 22 is pushed out.

Conversely, the bending angle can be reduced by tightening the outer nut 322.

[Effects of the invention] The combination bent pipe joint of the invention has the following unique effects.

Movement of the bent tube is accomplished by screwing the inner and outer nuts, so a large amount of force can be obtained and accurate angle adjustment can be achieved.

The center of curvature of the bent pipe can be set close to the inner side of the arm member, which allows a steep bending angle, that is, a small radius of curvature, and the space occupied by the bent pipe joint is reduced.

The force applied by the angle adjuster on the outside of the bent pipe rotates around the pin member inside the bent pipe as a fulcrum, so a large force can be exerted, and the turning force of the bent pipe joint can be easily obtained.

[Example] Hereinafter, an example of the bent pipe joint of the present invention will be described based on the drawings.

1 to 7 show an embodiment of the present invention.

Here, 1 and 2 are a pair of bent pipes to be combined.

Reference numeral 11 designates a bent socket portion formed at the end of the bent tube 1 and having a curvature, and 21 represents a bent socket portion formed at the end of the bent tube 2 and having the same curvature as the bent insertion portion 11. The bent socket part 11 is slidably accommodated within the bent socket part 21.

Reference numeral 12 denotes a reaction force receiving member stretched outside the bending direction of the bent pipe 1, and is formed on the brackets of the forks 12a, 12a. Reference numeral 13 denotes an arm member (bracket) stretched inside the bent pipe 1 in the bending direction. Further, reference numeral 14 denotes a socket part formed at the other end of the bent pipe 1, but the socket part 14 can be formed as an insertion part or a flange as appropriate.

A collar 2 is provided on the outside of the end of the bent socket 21 of the bent pipe 2.
1A is stretched and formed, and an appropriate number of bolt insertion holes 211 are bored in the circumferential direction of the collar 21A.
A reaction force receiving member 22 is attached to this collar 21A at an outer position of the bent pipe 2 and corresponding to the reaction force receiving member 12 of the bent pipe 1. The reaction force receiving member 22 is formed into two parts, and the bottom part thereof is fixed with a bolt. Reference numeral 23 denotes an arm member stretched inside the bent socket portion 21 in the bending direction, and is provided facing the arm member 13 of the bent pipe 1. Further, 24 is an insertion port formed at the other end of the bent pipe 2, but the insertion port may be formed in the socket or the flange as appropriate.

Reference numeral 3 denotes an angle adjuster, which includes a bolt rod 31, a nut 32, a bridge member 33, and pins 34, 35. The head 311 of the bolt rod 31 is arranged between the bifurcated brackets 12a, 12a of the reaction force receiving member 12 of the bent pipe 1, and the pin 34 is inserted into the pin hole drilled in the head 311 to tighten the bolt. The rod 31 is locked so that it can swing freely. 34a is a split pin that prevents the pin 34 from being pulled out. In addition, the threaded portion 3 of the bolt rod 31
An inner nut 321 and an outer nut 322 of the nut 32 are screwed into the bolt 12, and the bridge member 33 is sandwiched between the inner and outer nuts 321 and 322, and the bolt rod 31 is loosely inserted into the bolt insertion hole 33a.
The bridge member 33 further includes a reaction force receiving member 2 of the bent pipe 2.
2 via a pin 35 so as to be swingable.

4 is a pin member, which is interposed between the arm members 13 and 23 of the bent pipes 1 and 2;
2, and a nut 43. The pin 41 is inserted into a pin hole 42a of the fork member 42 and a pin hole at the tip of the arm member 13, and is prevented from being pulled out by the split pin 41a. Threaded rod 42 of forked member 42
1 is inserted into the bolt hole 23a of the arm member 23, and is tightened and fixed with a nut 43.

Reference numeral 5 indicates a packing interposed at the connecting portion of the bent pipe 1 and the bent pipe 2, and 6 indicates a press ring that abuts against and presses the packing 5.

7 is a fastener consisting of a bolt rod 71 and a nut 72. The bolt rod 71 is fastened to the flange 21A of the socket portion.
and the bolt insertion hole 61 of the press ring 6, and the head 711 of the bolt is inserted into the flange 2 of the socket portion.
The press ring 6 is engaged with the socket portion 1A by tightening the nut 72 screwed onto the bolt rod 71.
2 and press the packing 5.

Next, the angle adjustment operation of the above embodiment will be explained.

FIG. 1 shows a state in which the bent insertion part 11 is completely accommodated in the bent socket part 21 and the bending angle is small (in other words, the angle is gentle). Now, in order to make the bending angle even larger (in other words, make it steeper) than this state, when the inner nut 321 of the angle adjuster 3 is brought into contact with the bridge member 33 and tightened, the thrust of the nut will be The bent pipe 2 is transmitted to the reaction force receiving member 22 via the bridge member 33 and is integrated with the reaction force receiving member 22.
It will push out. In this case, since the angle adjuster 3 is swingable between the reaction force receiving members 12 and 22 of the bent pipe 1 and the bent pipe 2,
It is possible to follow the movements of 2.

Further, in order to accommodate the bent insertion portion 11 in the bent socket portion 21, the operation is reversed to that described above, that is, by tightening the outer nut 322.

In the above operation, move the bent pipe using nut 3.
Since this is done by the screw-in operation described in step 2, it is possible to obtain a large amount of force and also to make accurate angle adjustments.

The present invention is not limited to the configuration of the embodiments described above, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included within the technical scope of the present invention.

The bracket 12 on the outside of the bent pipe 1 is not limited to a bifurcated bracket, but may be a single piece. in this case,
The head 311 of the bolt rod 31 is bifurcated, and a bracket is sandwiched between the two prongs and rotatably locked by a pin.

The arm members and pin members disposed inward in the bending direction of both the bent pipes 1 and 2 are not limited to the embodiments described above; for example, as shown in FIGS. 8 and 9,
A simple embodiment can be adopted in which the ends of the arm members 13', 23' are directly overlapped with each other and are rotatable by means of the pin 4'.

In this embodiment, the end of the socket 21 of the bent pipe 2 is configured as a so-called mechanical joint, but this is not limited to this embodiment, and other embodiments may be used as long as the bent socket 11 has a slidable joint structure. (for example,
You are free to use socket joints.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the combined bent pipe joint of the present invention, with Figure 1 being a longitudinal sectional side view thereof, Figure 2 being a partial side view as seen from the X direction of Figure 1, and Figure 3 is an enlarged perspective view of the main part of Fig. 2, Fig. 4 is a partial side view of Fig. 1 seen from the Y direction, Fig. 5 is an enlarged perspective view of one part of Fig. 4, and Fig. 6 is A cross-sectional front view taken along the Z-Z line, Figure 7 is the - of Figure 6.
It is a sectional view of a push ring part cut along a line.
FIG. 8 is a partial longitudinal sectional view showing another embodiment of the present invention, and FIG. 9 is a partial side view seen from the W direction in FIG. 8. 1...Bent pipe, 11...Bent insertion part, 12...
Reaction force receiving member, 13... Arm member, 2... Bent pipe,
21...Bending socket part, 22...Reaction force receiving member, 2
3...Arm member, 3...Angle adjuster, 4...Pin member.

Claims (1)

[Claims for Utility Model Registration] One bent pipe 1 of the pair of bent pipes 1 and 2 to be combined is formed with a bent insertion part 11 having a curvature at least at one end thereof, and the other bent pipe 2
has a curved socket part 21 having the same curvature as the curved socket part 11 that slidably accommodates the curved socket part 11;
is formed, and reaction force receiving members 12 and 22 are fixed to each of the bent pipes 1 and 2 outward in the bending direction, and one end of the bolt rod 31 is swung to one of the reaction force receiving members 12. The threaded portion 31 of the bolt rod 31 is freely supported, and the threaded portion 31 of the bolt rod 31 is attached to the other reaction force receiving member 22.
2 is loosely inserted, and the bridge member 33 is swingably attached, and an inner nut 321 and an outer nut 322 are screwed into the threaded portion 312 of the bolt rod 31 with the bridge member 33 in between, and On the other hand, each of the bent pipes 1 and 2 is provided with arm members 13 and 23 that project from each other in the vicinity of the center of curvature, and a pin member 4 is interposed between the arm members 13 and 23. A combination bent pipe joint featuring: