JP3018876U - Pipe fittings - Google Patents

Abstract

(57) [Summary] [Purpose] A pipe that can be attached to the outer periphery of the pipe in a short time and once, and that is easy to attach and that does not cause leakage of the fluid conveyed in the pipe. Get the fittings. [Structure] One ends of two curved plate-shaped bodies 15a, 15b are connected to each other via a hinge 16, and the other ends 14a, 14b of the respective plate-shaped bodies 15a, 15b are opposed to each other and are substantially formed. A cylindrical casing is formed, and a V-shaped protruding end 40a and a V-shaped notched end 40b that meshes with the protruding end are engaged in the casing to form a cylindrical sleeve 40.
The rod nut 26 and the rod washer 24 are supported in the brackets 20a and 20b provided on the second end portions 14a and 14b, and the rod nut 26 and the rod washer 24 are bridged via bolts. The bracket 2
The outer circumferences of 0a and 20b are crushed to form the indented portion 22, and the rod nut 26 and the rod washer 24 are pressed against each other by the indented portion 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement in a pipe fitting, and more particularly, a casing is used to tighten the outer circumference of a sleeve wound around the outer circumference of a pipe to prevent leakage of fluid from a pipe joint or a damaged portion of the pipe. This is related to the improvement of fittings for pipes that are attached to the outer circumference of pipes.

[0002]

[Prior art]

 Various means have been proposed as pipe joints used for connecting pipes, and there are various methods such as a flange method, a socket method, a union method, and a welding method.

Of these, the flange method is a method in which flanges are attached to both ends of pipes to be phase-coupled by welding, the flanges attached to both pipes are polymerized, and the flanges are bolted to each other. It is a method of connecting.

In addition, the socket method and the union method are those in which a thread groove is formed in a pipe or a nut having an inner diameter equal to the outer diameter of two pipes, and the screw threads formed at the ends of both pipes are It is a method of connecting pipes by screwing them into a thread groove.

Further, the welding method is a method for directly connecting the pipes to be connected to each other by welding or the like.

In the above conventional pipe connection, it is necessary to process the pipe itself by welding flanges to both ends of the pipe or forming threads on the end of the pipe. Is extremely complicated, and it is difficult to take immediate action on site, and fluid leakage easily occurs due to corrosion of the flange, screw threads, or welded portion.

Therefore, in order to eliminate such a defect, the cylindrical sleeve 40 wound around the outer circumference of the tube is formed into a substantially cylindrical shape by confronting the end portions 14a and 14b of the plate-like body 15 having one curved shape. And a rod washer 24 and a rod nut 26 are rotatably and loosely inserted into brackets 20a and 20b provided on the end portions 14a and 14b, respectively, which are covered with each other, and are covered by There is a pipe joint in which bolts 28, 28 are inserted from the rod washer 24 and screwed with the rod nut 26, and the pipe joint 12 can be fastened to the outer circumference of the pipe by tightening with the bolts 28, 28. [FIG. 11 (A)].

[0008]

[Problems to be solved by the device]

 In the conventional pipe joint 12, the rod washer 24 and the rod nut 26, which are loosely fitted in the brackets 20a and 20b, rotate or slide in the brackets 20a and 20b, and the rod washer 24 shown in FIG. ) Or a position shift occurs as shown in FIG. 11 (B). Thus, once the rod washers 24 and the rod nuts 26 are displaced within the brackets 20a, 20b, the bolts 28, 28 cannot be screwed from the rod washer 24 toward the rod nut 26. However, positioning at the work site is extremely difficult. In particular, at the time of connecting pipes, one hand is always closed to fix the pipe joint 12 to the pipes to be connected and the outer periphery thereof, so this positioning must be performed with one hand.

However, it is extremely difficult to position the rod washer 24 and the rod nut 26 rotated in the brackets 20a and 20b with one hand to return the bolts 28 and 28 to the correct positions where they can be inserted. When working near the ceiling or near a wall, connecting pipe ends of pipes that are located in places where it is impossible to visually check, such as on the back side of obstacles, or when installing this pipe joint to prevent fluid leakage, or in narrow places. It is extremely difficult to adjust the positions of the rod washer 24 and the rod nut 26 with one hand when performing the work. Therefore, as a conventional work, when the rod washer 24 and the rod nut 26 are thus displaced in the brackets 20a and 20b, the pipe joint 12 once attached to the outer circumference of the pipe is removed, and the rod washer 24 and After adjusting the position of the rod nut 26 again, slowly attach the rod washer 24 and the rod nut 26 again to the outer circumference of the pipe so that the rod washer 24 and the rod nut 26 do not rotate. The bolts 28, 28 were slowly inserted and screwed so as not to rotate within 20b, and the pipe joint 12 was tightened again.

However, the above-described fitting work of the pipe joint 12 may be urgent, such as connecting and repairing pipes that are leaking water or leaking gas, especially when working on gas leaks. It was dangerous to work long hours. Further, if it is necessary to repeatedly position the rod nut 24 and the rod washer 26 as described above, the work efficiency is extremely poor and it is not preferable in terms of mental health of the worker. In particular, since the bolts 28, 28 are formed in a cylindrical shape having a constant thickness from the base portion to the tip thereof, the rod nut 24 and the rod nut 24 formed to have an inner diameter substantially the same as the outer diameter of the bolts 28, 28. It is difficult to insert the rod washer into the hole and the screw hole, which makes it difficult to attach the bolts 28, 28.

Further, the casing 14 of the conventional pipe joint 12 is formed into a substantially cylindrical shape by confronting the end portions 14a and 14b of the curved plate-like body 15 and the both end openings 31, 31 of the casing are formed. Since the flange 36 protruding from the 31st edge toward the center of the casing 14 is provided, the presence of the flange 36 causes only a slight opening / closing between the end portions 14a and 14b of the casings 14 arranged facing each other. When connecting pipes having a diameter exceeding this opening / closing width, it is necessary to insert the pipes connected from both end openings 31 and 31 of the casing 14 into the casing 14 and the sleeve 40 arranged therein. .

Therefore, when the outer periphery of the connecting portion of the already connected pipe is covered with the pipe joint 12 for repair, the connecting portion must be temporarily removed, and cracks may occur in the middle of the integral pipe. If leakage occurs due to damage, etc., the outer circumference of this pipe cannot be covered with a pipe joint for repair.

Further, when the ends 14a and 14b of the casing 14 are openable and closable, and the pipe can be inserted into the pipe joint 12 from between the ends 14a and 14b, the casing 14 is arranged inside the casing 14. Similarly, the cylindrical sleeve 40 that has to be opened and closed must also be configured to be openable and closable, but this sleeve 40 is cut in a straight line in the width direction and the end portion having a linear cut end is engaged to form a cylindrical shape. In such a case, even if the casing 14 is tightened, the close contact of the engaging portion is poor, which may cause leakage of liquid or gas conveyed in the pipe. In particular, when both end engaging portions of the sleeve 40 are located at the stepped portion generated in the casing 14, the engaging portions are displaced from each other, which may cause leakage of liquid or gas.

In addition, when two pipes having different outer diameters are connected to each other, in the conventional pipe joint, there is a normal pressure or a normal pressure that is conveyed in the pipe from the connecting portion between the outer circumference of the small diameter pipe and the sleeve 40. The fluid such as a pressurized liquid or gas easily leaked.

Therefore, an object of the present invention is to prevent the rod nut 24 and the rod washer 26 from being misaligned in the brackets 20a and 20b, so that the rod nut 24 and the rod washer 26 do not need to be positioned and the bolt is not required. By making 28, 28 into a shape that can be easily inserted into the hole of the rod washer 24 and the screw hole of the rod nut 26, it is possible to easily attach them to the outer circumference of the pipe to be connected or repaired in a short time and once. It is to provide a fitting for a pipe used as a pipe joint or the like.

Another object of the present invention is to provide a pipe fitting which can be easily attached to the outer circumference of the pipe by facilitating opening and closing between the end portions 14a and 14b of the casing 14 which are arranged to face each other. To provide.

Further, another object of the present invention is to cut both end portions of the sleeve 40 into a V shape in the width direction of the sleeve 40, and the ends of the sleeve 40 are fitted to each other when tightened by the casing 14. The shape is to provide a fitting for a pipe that has good adhesion between the ends of the sleeve 40 when tightened by a casing and that does not create a gap between the outer circumference of the pipe and the sleeve 40. .

In addition, a further object of the present invention is that even if pipes having different outer diameters are connected, the fluid conveyed in the pipes between the outer circumference of the small diameter pipe and the inner peripheral surface of the sleeve 40 can be prevented. The aim is to provide a leakproof tube fitting.

[0019]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the pipe fitting of the present invention forms a substantially cylindrical casing 14 by confronting both ends 14a and 14b of a curved plate-like body 15, and the both openings of the casing 14 are formed. A flange 36 projecting toward the center of the casing 14 is provided at the edges 31 and 31, a cylindrical sleeve 40 is further arranged in the casing 14, and a rod nut 26 and a rod washer are provided at both ends 14a and 14b. Brackets 20a and 20b for supporting 24 are provided respectively, a bar nut 26 having a female screw is fitted and inserted into one (20b) of the brackets 20a and 20b, and the other bracket 20a is slightly larger than the outer diameter of the bolt 28. The rod washer 24 having the formed hole is fitted and inserted into the brackets 20a and 20b, and the openings 30a and 30b are formed to communicate with the holes of the rod washer 24. 0b and the holes 30c and 30d communicating with the screw holes of the rod nut 26 are drilled, and a bolt is inserted into the hole of the rod washer 24 through the holes 30 (30a to 30d). The tip of the casing is screwed into the screw hole of the rod nut 26, the bolts 28, 28 are hung between both ends of the casing 14, and the inner wall of one end of the casing 14 has an inner wall of the casing 14. In a pipe fitting 12 formed by fixing a sliding plate 32, which is a plate body that is curved with substantially the same curvature as the circumference and is inscribed in the inner wall of the other end, the outer walls of the brackets 20a, 20b of the above 2 are attached. The indented portion 22 is formed by crushing, and the inner wall of the bracket 20a, 20b is attached to the rod flange 24 and the rod nut 26 supported by the indented portion 22 in the brackets 20a, 20b. Characterized by providing to press the.

The casing 14 of the fitting 12 for the pipe is formed into a substantially cylindrical shape by confronting the end portions 14 a and 14 b of one curved plate-shaped body 15, and the both end openings 31 of the cylindrical casing 14 are formed. , 31 have flanges 36 formed at the edges of the casing 31 at mutually symmetrical positions, and one or a plurality of notches 37 are provided for the flanges 36, so that the casing 14 can be opened and closed between the opposite end portions 14a, 14b. In addition, one end of each of the two curved plate-shaped bodies 15a and 15b is connected to each other via a hinge 16, and the other ends 14a and 14b of the respective plate-shaped bodies 15a and 15b are connected to each other. The inner wall surfaces of the connecting portions of the two plate-shaped bodies 15a and 15b, which are opposed to each other and have a substantially cylindrical shape and are connected via the hinge 16, are curved with substantially the same curvature as the plate-shaped bodies 15a and 15b. Covered with a protective plate 34, and It is also possible to form one end of the protection plate 34 by fixing it to the inner wall surface of either one of the two plate-shaped bodies 15a and 15b.

Further, the sleeve 40 is formed into a cylindrical shape by engaging a notched end 40b that is notched in a V shape in the width direction of the sleeve 40 and a V-shaped protruding end 40a that fits with the notched end 40b. It is characterized in that both ends of the sleeve are joined to the inner wall surface of the casing 14 which is in contact with the slide plate, except for the inner wall surface.

The bolt 28 has a conical shape or a conical or pyramidal shape in which the tip portion is gradually thinned and changed in cross section, and the hole of the rod washer 24 into which the bolt 28 is inserted and the screw hole of the rod nut 26 are inserted. It is preferable to form a counterbore-like spot facing the inlet of the hole of the rod washer 24 and the screw hole of the rod nut 26 at the inlet periphery.

In addition, the large-diameter pipe and the small-diameter pipe having different outer diameters can be inserted into the openings at both ends of the sleeve 40, and the openings at both ends of the sleeve 40 are formed to have different inside diameters. Tongue-shaped portions 46a and 46b are respectively formed on the inner peripheral edges of the both-end openings and project from the one end side of the both inner peripheral edges to the opening direction at the other end side. The inner peripheral surface is bulged toward the tip of the tongue-shaped portions 46, 46 to form annular protrusions 48a, 48b continuous in the circumferential direction on the sleeve inner peripheral surface, and the protrusions 48a, 48b. The inner circumference of the sleeve 40 is bulged toward the center of the sleeve 40, and its tip is pressed against the outer circumference of the small-diameter pipe inserted into the sleeve 40, and the inner circumference of the sleeve 40 is urged in the circumferential direction. Continuous A plurality of annular bulging portions 42, 44, 44 'having a substantially rectangular cross section are formed, and one side surface of one of the bulging portions 42, 44, 44' is a large diameter pipe end surface. The other bulging portion 44 (, 44 ') is formed between the one bulging portion 42 and the small diameter tube side protrusion 48b while being inclined in the direction of the large diameter tube end surface. can do.

[0024]

[Action]

 When the bolts 28, 28 screwed to the rod nut 26 are removed and the bolts 28, 28 are pulled out from the rod nut 26 and the rod washer 24, the end portions of the casing 14 which are mutually tightened by the bolts 28, 28. The space between 14a and 14b is opened.

Then, when fingers and the like are inserted between the end portions 14a and 14b of the opened casing 14 and pushed out, the casing 14 formed of one curved plate-like body 15 has a flange 36. In the casing 14 in which the plate-shaped body 15 is bent from the vicinity of the notch 37 provided in the above, and the two curved plate-shaped bodies 15a and 15b are connected via the hinge 16, the plate-shaped body 15a , 15b are rotated by the connecting portion by the hinge 16 and the end portions 14a, 14b of the casing 14 are opened.

Then, on the outer circumference of the pipe to be connected or repaired between the end portions 14a and 14b of the opened casing 14, the pipe is inserted between the projecting end 40a and the notched end 40b of the sleeve 40 arranged in the casing 14. The sleeve 40 is arranged by wrapping around the repaired portion on the outer periphery or by fitting the inner periphery of the casing 14 from the pipe end.

Thereafter, the protruding end 40 a and the notched end 40 b of the sleeve 40 are closed, and the ends 14 a and 14 b of the casing 14 are closed, and the bolts 28, 28 that have been extracted are fitted and inserted from the rod washer 24. Screw it to the rod nut 26 to tighten the casing 14. The rod washer 24 and the rod nut 26 supported in the brackets 20a and 20b are optimally positioned by the indentation portion 22 formed by crushing the rod nut 26 and the rod washer 24 from the outer periphery of the brackets 20a and 20b. That is, since the bolts 28, 28 are fixed in the brackets 20a, 20b at the positions where the bolts 28, 28 are inserted, when the bolts 28, 28 are fitted and screwed into the rod washer 24 and the rod nut 26, respectively. The rod washer 24 and the rod nut 26 do not shift in position within the brackets 20a, 20b, and the tips of the bolts 28, 28 have a conical shape or a mounting shape in which the cross section gradually changes in the tip direction. It is formed in a conical shape. On the other hand, the holes of the rod washer 24 into which the bolts 28, 28 are inserted and the screw hole inlet of the rod nut 26 are formed around the holes. Since the counterbore-shaped counterbore 27, 27 is formed so as to incline toward the entrance of the hole or screw hole, the bolts 28, 28 guided by the counterbore 27, 27 are surely attached to the bar washer 24. It is inserted into the hole and the screw hole of the rod nut 26.

After the bolts 28, 28 are screwed into the rod nut 26, if the bolts 28, 28 are tightened with a tool such as a rod wrench or a spanner, the end portions 14 a, 14 b of the casing 14 are separated from each other. The tube fitting 12 is attached to the outer circumference of the tube so as to be narrowed. At this time, since the protruding end 40a, which is the end of the sleeve 40, and the notch end 40b are formed in a shape that fits into each other, both ends of the sleeve 40 that is tightened by tightening the casing 14 are in tight contact with each other. To do.

Further, since the slide plate 32 is arranged between the end portions 14a and 14b of the casing 14, even if the end portions 14a and 14b of the casing 14 do not completely contact each other, the end portion It is possible to prevent the sleeve 40 from protruding from between the end portions 14a and 14b of the casing 14 and to prevent wrinkles from occurring without forming a gap between 14a and 14b.

When used as a pipe joint for connecting pipes having different outer diameters, each having a sleeve 40 having bulged portions 42, 44, 44 ′ formed on the inner peripheral surface, the outer periphery of the pipe having a small diameter is used. Is wound by a plurality of bulging portions 42, 44, 44 ', so that the fluid that leaks between the sleeve 40 and the outer circumference of the pipe to leak out is bulged portion 42, 44 or 42, 44, 44, It is decompressed by 44 'and is prevented from leaking out, so that it cannot leak from the casing 14.

[0031]

【Example】

 Next, a preferred embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a pipe fitting 12 includes a sleeve 40 that covers the outer periphery of the pipe, a casing 14 that covers the outer periphery of the sleeve 40 and fastens the sleeve 40 to the outer periphery of the pipe, and a casing 14. A fastening ring that is arranged between the flanges 36 provided at the openings 31 and 31 on both ends of the pipe and the sleeve 40, and that when the pipe is fastened by the casing 14, cuts into the outer periphery of the pipe to fix the pipe in the fitting 12 of the pipe. 50 and a ring 60 for fixing the fastening ring 50 in the casing 14.

[Casing 14] FIG. 2 is a front view of the casing 14. In this embodiment, two plate-like bodies 15a and 15b whose cross-sectional shape is curved in a semi-arcuate shape are arranged at left-right symmetric positions, and One end of each of the plate-shaped bodies 15a and 15b facing each other is connected by a hinge 16, and the other ends of the plate-shaped bodies 15a and 15b, that is, the end portions 14a and 14b of the casing 14 are arranged to face each other. It is formed in a substantially cylindrical shape.

The end portions 14a, 14b of the casing 14 arranged opposite to each other are provided with tongue pieces 18a, 18b extending from the end portions 14a, 14b, respectively, and the tongue pieces 18a, 18b are provided. Is folded back to the outside of the semi-circular plate-shaped bodies 15a and 15b, and its tip is fixedly attached to the outer periphery of the plate-shaped bodies 15a and 15b to form an arc that inscribes a rod washer 24 and a rod nut 26 described later. The bracket 20 (20a, 20b) formed on the portion is formed. The rod washer 24 having two holes having an inner diameter slightly larger than the outer diameters of the bolts 28, 28 is supported in the bracket 20a formed between the tongue piece 18a and the outer periphery of the plate-shaped body 15a. A bar nut 26 having a screw hole to be screwed with the bolt 28 is supported in the bracket 20b formed between the outer periphery of the other plate 15b and the tongue piece 18b.

Further, the brackets 20a and 20b are provided with holes 30 (30a to 30d) for inserting the bolts 28 and 28 into the rod washer 24 and the rod nut 26, respectively. The bolts 28, 28 are inserted into the rod washer 24 via 30 (30a to 30d) and screwed into the rod nut 26. In this manner, the brackets 20a and 20b supported by the bar washer 24 and the bar nut 26 are crushed by an outer wall, for example, with a punch or the like to form the indentation portion 22 (FIGS. 1 and 3), and the bracket is used. The inner walls of 20a and 20b are pressed against the rod washer 24 and the rod nut 26 to prevent the rod washer 24 and the rod nut 26 supported in the brackets 20a and 20b from being displaced in the brackets 20a and 20b. (Fig. 3).

Further, the tip end portions of the bolts 28, 28 are preferably formed in a conical shape or a conical cone shape whose cross-section gradually narrows toward the tip end, as in the illustrated embodiment. In the vicinity of the hole entrance of the rod washer and the screw hole of the rod nut into which 28, 28 are inserted, the tip portions of the bolts 28, 28 are guided into the hole of the rod washer 24 and the screw hole of the rod nut 26. A counterbore-like counterbore 27 for forming is formed.

Further, one end (15b) of the plate-like body forming the casing 14 is fixed to one end of a slide plate 32 which is curved with a curvature substantially similar to the inner circumference of the casing 14, When the casing 14 is closed, the slide plate 32 covers the space between the ends 14a and 14b of the casing 14 from the inner circumference of the casing, and the other end forms the casing 14 as the casing 14 is opened and closed. It is arranged at a position where it slides on the inner circumference of the other plate-shaped body 15a.

In addition, at the ends of the plate-shaped bodies 15a and 15b connected by the hinge 16, it is preferable that the inner peripheral surface of the plate-shaped body 15a has a curvature substantially the same as the inner periphery of the casing 14. One end of the bending protection plate 34 is fixed, and when the casing 14 is closed, the connection portion of the plate-like bodies 15a and 15b connected by the hinge 16 is covered by the protection plate 34 from the inner peripheral side of the casing 14. Is configured to.

Further, flanges 36, 36 projecting toward the center of the casing 14 are provided on the peripheral edges of the openings 31, 31 of the casing 14, and are fixed to the inner peripheral surfaces of the plate-shaped bodies 15a, 15b. A similar flange 36 is also formed on the slide plate 32 and the protective plate 34, and a continuous flange 36 is formed over the entire inner peripheral edge of the opening even when the ends 14a and 14b of the casing 14 are separated from each other. Is configured.

The configuration of the casing 14 is not limited to the case where the two plate-shaped bodies 15a and 15b are connected by the hinge 16, and the end portions 14a and 14b of one curved plate-shaped body 15 face each other. To form a substantially cylindrical casing 14, and by forming one or a plurality of notches 37 in the flanges 36, 36 protruding from the both end openings 31, 31 of the casing 14, one end portion 14a of the casing 14, It is also possible to make it possible to open and close between 14b (Fig. 5).

[Sleeve 40] A cylindrical sleeve 40 is arranged in the casing 14.

In FIG. 1, reference numeral 40 denotes a sleeve, which is made of an elastic material such as synthetic rubber and has a cylindrical shape having an outer diameter substantially the same as the inner circumference of the casing 14 described above, and has a V-shape. A projecting end 40a and a V-shaped notch end 40b that fits the projecting end 40a are arranged in engagement with each other to form a cylindrical shape.

The outer periphery of the sleeve 40 is formed flat so as to ensure good adhesion with the inner peripheral surface of the casing 14.

As shown in FIG. 6, the inner peripheral surface of the sleeve 40 is formed in an uneven shape. The concavo-convex shape of the inner peripheral surface of the sleeve 40 is undulated in a wavy shape at its center, and the sleeve 40 is folded back toward the center of the inside of the sleeve 40 near the openings at both ends of the sleeve 40. Tongue-shaped portions 46a and 46b, and protrusions 48a and 48b formed by bulging the inner circumference of the sleeve 40 into a substantially trapezoidal shape are formed in the tip direction of the tongue-shaped portions 46a and 46b, respectively. . Then, compartments 49, 49 are formed by the inclined surfaces of the protrusions 48a, 48b and the tongue-shaped portions 46a, 46b.

The sleeve 40 shown in FIG. 6 is used for connecting two pipes having the same outer diameter or for preventing fluid from leaking from a damaged portion of the pipe. Reference numeral 7 is a sleeve 40 showing another embodiment of the present invention, and this sleeve 40 is used for connecting two pipes having different outer diameters of a small diameter pipe and a large diameter pipe.

As shown in FIG. 7, the opening of the sleeve 40 has different inner diameters on the left and right in the axial direction. A bulge having a rectangular cross-section having a length sufficient to allow consolidation to the outer circumference of a small-diameter pipe to be connected, slightly inward of the protrusion 48a formed near the opening of the large-diameter sleeve 40. The portion 42 is formed, and the bulging portion 42 is pressed against the end surface of the large diameter pipe and the outer periphery of the small diameter pipe so that the connecting portion of the pipe is sealed. On the other hand, on the inner circumference of the sleeve 40 into which the small-diameter pipe is inserted, two bulging portions 44, 44 'having a trapezoidal cross-section whose tip is inclined toward the connecting portion of the pipe are formed. The structure of the open end portion of the sleeve 40 shown in FIG. 7 is similar to that of the sleeve 40 of the fitting for a pipe having the same outer diameter shown in FIG.

[Fastening Ring] Reference numeral 50 in FIG. 1 denotes a fastening ring, which has an annular shape whose center is inclined inward of the fitting 12 of the pipe, and whose inner circumference is A plurality of teeth 52 are formed at equal intervals. The tooth 52 is formed by cutting a substantially L-shaped cut from the inner circumference of the annular ring and slightly raising the portion surrounded by the cut.

The fastening ring 50 has a C-shape with one end cut out, and an auxiliary plate 54 extending one cut-out end is fixed to the cut-out portion. The other end of the plate 54 is slidably brought into contact with the side surface of the other notched end to form the ring in an endless ring shape.

The fastening ring thus formed is inserted between the flange of the casing and the open end of the sleeve 40 arranged in the casing (see FIG. 6). When inserting the fastening ring, it is preferable to dispose a ring 60 formed by bending a metal wire or the like in a C shape between the fastening ring and the flange of the casing. By inserting the ring 60 in this manner, play of the fastening ring 50 in the casing 14 can be prevented.

When the pipe fitting 12 is used, the bolts 28 and 28 screwed into the rod nut 26 are removed, and the bolts 28 and 28 are removed from the rod nut 24 and the rod washer 24. The end portions 14a and 14b of the casing 14 that have been fastened by the screws 28 and 28 are separated from each other. Then, when fingers are inserted between the separated end portions 14a and 14b and the end portions 14a and 14b are separated from each other, in the casing 14 made of one plate-shaped body 15, the flange 14 is provided. In the casing 14 in which the plate-shaped body 15 is bent near the notch 37, and one end of each of the two plate-shaped bodies 15a and 15b is rotatably connected via a hinge 16, The plate-like bodies 15a and 15b rotate from the hinge 16 portion to further open the space between the end portions 14a and 14b of the casing 14.

In this way, when the ends 14a and 14b of the casing 14 are opened, the sleeve 40 arranged inside the casing 14 is exposed. The sleeve 40 is formed into a cylindrical shape by mutually engaging a protruding end 40a protruding in a V-shape and a notched end 40b notched in a V-shape that fits the shape of the protruding end 40a. The tube 40 can be inserted into the sleeve 40 by separating the protruding end 40a and the notched end 40b of the sleeve 40 from each other.

Then, after inserting the pipe into the sleeve 40 from between the protruding end 40a and the notched end 40b of the sleeve 40, the protruding end 40a and the notched end 40b are engaged with each other to attach the sleeve 40 to the pipe. Wrap around the circumference.

When the pipe fitting 12 has the fastening ring 50, the notch portions of the fastening ring 50 and the ring 60 are widened to insert the pipe into the ring, and both ends of the sleeve 40 are Deploy. After that, the sleeve 40, the fastening ring 50, and the ring 60 are covered with the casing, and the ends 14a and 14b of the casing 14 are closed. At this time, if the engaging portions of both ends of the sleeve 40 are positioned on the inner peripheral surface of the plate-shaped body 15 (or 15a, 15b), the sliding plate 32 and the protective plate 34 will make a step portion formed in the casing 14. It is particularly desirable in that the two end engaging portions of the sleeve 40 are not positioned and the leakage of fluid such as liquid or gas conveyed in the pipe is unlikely to occur.

As a method of inserting the pipe into the pipe fitting 12, regardless of the above method, after loosening the bolts 28, 28, the casing 14 and the sleeve 14 are respectively opened from both end openings of the pipe fitting 12. A tube may be inserted in 40.

In this way, the pipe fitting 12 arranged on the outer circumference of the pipe is pulled out by the rod washer in the bracket 20a provided at the end portions 14a and 14b of the open casing 14 as described above. The bolts 28, 28 are inserted, the front ends of the bolts 28, 28 are screwed into the rod nut 26, and the casing 14 is tightened. The rod washers 24 and the rod nuts 26 supported in the brackets 20a and 20b are pressed against the indented portions 22 formed by crushing the rod nuts 26 and the rod washers 24 from the outer periphery of the brackets 20a and 20b. Therefore, it is fixed in the brackets 20a, 20b so as not to be displaced while being positioned at the optimum position, that is, the receiving position of the bolts 28, 28, and the tip portions of the bolts 28, 28 are arranged. Is formed in a conical shape or a truncated cone shape whose cross section gradually changes in the direction of the tip, and the hole of the rod washer 24 and the screw hole of the rod nut 26 for receiving the bolts 28, 28 are formed at their inlets. Since the counterbore-shaped counterbore 27, 27 is formed so as to incline the periphery in the inlet direction of the hole and the screw hole, the counterbore 27, 27 is The tips of the bolts 28, 28 are properly guided into the holes of the rod washer 24 and the screw holes of the rod nut 26. Therefore, when the bolts 28, 28 are fitted into and screwed into the rod washer 24 and the rod nut 26, the rod washer 24 and the rod nut 26 do not shift in position within the bracket, and the bolts 28, 28 are not displaced. It can be very easily screwed onto the rod nut 26.

After the bolts 28, 28 are screwed into the rod nut 26, the bolts 28, 28 are tightened using a tool such as a rod wrench or a spanner, so that the ends 14 a, 14 b of the casing 14 are separated from each other. Narrowing down, the sleeve 40 and the fastening ring 50 arranged in the casing 14 are tightened.

As described above, the sleeve 40 is formed into a cylindrical shape by engaging the V-shaped protruding end 40a and the V-shaped notched end 40b that fits with the shape of the protruding end 40a. Therefore, the V-shaped protruding end 40a and the notched end 40b are pressed against each other by this tightening. At this time, the sloped surface of the V-shaped protruding end 40a and the sloped surface of the V-shaped notched end 40b slide against each other, and the fitting of the ends is performed extremely well. There is no generation of voids due to poor contact between the notched ends 40b, and no leakage of liquid or gas due to wrinkles occurring when over-tightening.

Although the fastening ring 50 arranged in the casing 14 is also fastened by fastening with the casing 40, a plurality of teeth are formed on the inner peripheral side of the fastening ring 50. By the tightening, the teeth 52 bite into the pipe from the outer periphery of the pipe to fix the pipe in the fitting 12 of the pipe. In particular, the fastening with the fastening ring 50 uses a relatively soft material on the outer circumference of the pipe, such as a pipe made of vinyl chloride, a pipe whose surface is coated with a plastic material such as urethane resin, or a pipe whose surface is rubberized. A great effect is exerted on the connection of the formed pipes, and the fixing by the fastening ring 50 prevents the connected pipes from falling out of the pipe fitting 12. Therefore, the pipe fitting 12 of the present invention can be used for a pipe that conveys a high-pressure liquid or gas.

Since the slide plate 32 is arranged between the end portions 14a and 14b of the casing 14, there is no gap between the notched ends 14a and 14b of the casing, and the sleeve 40 is attached to the end portions of the casing. It is possible to prevent the protrusion of wrinkles from occurring between the portions 14a and 14b and the occurrence of wrinkles due to the protrusion, and to prevent the case where both end engaging portions of the sleeve 40 are located between the end portions 14a and 14b of the casing 14. Also, since the slide plate 32 presses the sleeve 40 from the outer periphery thereof, there is no possibility that liquid or gas leaks from the engaging portions on both ends of the sleeve 40.

Further, in the casing 14 formed by connecting the two plate-like bodies 15 a and 15 b via the hinge 16, the protection plate 34 is arranged at a position where the hinge 16 is covered from the inner circumference of the casing. This prevents the hinge 16 from biting the sleeve 40 when the casing 14 is opened or closed, or the outer periphery of the sleeve 40 rubbing against the corners of the hinge 16 or the plate-shaped bodies 15a and 15b, thereby damaging the sleeve.

In this way, when the pipe fitting 12 of the present application is fixed to the outer circumference of the pipe, the tongue-shaped portions 46, 46 formed in the shape of a flat strip on the inner circumference of the opening edge of the sleeve 40 form the outer circumference of the pipe. Then, the inside of the fitting 12 of the pipe is made airtight by crimping. When a fluid such as a liquid or a gas transported in the pipe leaks from the connecting portion between the pipes, the fluid leaking from the pipe is directed toward the tip of the tongue-shaped portion 46 as shown in FIG. Passing through the flow paths 47, 47 formed between the protruding projections 48, 48 and the tongue-shaped parts 46, 46, the compartments 49, 49 formed by the tongue-shaped parts 46, 46 and the protruding parts 48, 48 It is introduced into the inside and filled in the compartments 49, 49, and the tongues 46, 46 are pressed against the outer circumference of the tube by the pressure of the fluid as shown by the arrow in FIG. Therefore, the contact between the outer circumference of the pipe and the tongue-shaped portions 46, 46 becomes more dense, and the fluid or the like does not leak from the portion.

Further, in a sleeve (FIGS. 7 and 9) used for connecting pipes having two different outer diameters, which is a modified example of the sleeve, in the tip end direction of the tongue-shaped portions 46a, 46b. One of the bulging portions 42, 44, 44 ′ arranged between the two protruding portions 48 a, 48 b that bulges in As shown in FIG. 9, it is wound by contacting the joint step portion of the second pipe, that is, the opening edge of the large diameter pipe and the outer periphery of the small diameter pipe. In this way, when the sleeve 40 is wound and tightened, the three one bulged portion 42 and the other bulged portions 44, 44 'formed on the inner circumference of the sleeve are attached to the outer circumference of the small-diameter pipe. While being pressed, the tongue-shaped portions 46a and 46b come into close contact with the outer circumferences of the small diameter pipe and the large diameter pipe, respectively. The fluid, such as liquid or gas, which is about to leak from the connecting portion of the large-diameter pipe and the small-diameter pipe is prevented from leaking to the outside by the one bulging portion 42 sealing the connecting portion of the pipe. To be done. The fluid that passes through the one bulge 42 and passes between the outer circumference of the large-diameter pipe and the sleeve to leak out has a tongue-like shape with the protrusion 48a provided near the large-diameter opening. After passing through the flow path 47 formed between the portions 46a and filled in the compartment 49, the tongue portion 46a is pressed against the outer circumference of the pipe to prevent fluid leakage.

On the other hand, in spite of the presence of the one bulged portion 42, the fluid leaked to the small diameter tube side hits the other bulged portion 44, but at this time, the other bulged portion 44 is Flow direction of fluid Since the tip is inclined toward the upstream side, the fluid colliding with the other bulging portion 44 presses the other bulging portion 44 in the direction shown by the arrow in FIG. Most of the fluid leaking from the tube is stopped by the other bulging section 44 because the protruding section 44 is pressed against the outer circumference of the tube. The fluid that has also passed through the other bulging portion 44 is decompressed and is prevented from leaking by another bulging portion 44 'having the same configuration as the other bulging portion 44. Despite the presence of the two other bulges 44, 44 ', the leaked fluid will flow through the flow passage 47 formed between the trapezoidal protrusion 48b and the tongue 46b. The inside of the casing 14 is filled with the tongue-like portion 46b so as to press the outer circumference of the tube and the gap between the outer circumference of the tube and the sleeve 40 is eliminated, so that the fluid does not leak from the casing 14 to the outside.

When two pipes having different outer diameters are joined to each other in this way, the protrusion length of the flange 36 formed on the opening edge of the casing 14 is different between the left and the right. Is suitable.

The pipe fitting 12 configured as described above is used for pipes in ships such as tankers, gas pipes, pipes for heating and cooling, pipes in large buildings, pipes in the heavy industry field, and pipes in industrial plants. It can be used for pipes in various fields such as pipes, and in particular, unlike pipes connected by welding, etc., due to the shock absorbing property of the sleeve 40 formed of an elastic material, the pipes around the device that vibrates due to shock absorption can be broken or bent. Can be prevented. Further, due to the elasticity of the sleeve 40, not only when the pipes are connected in a straight line, but also when the pipes are connected at a slight angle, liquid, gas, etc. may leak from the connection portion. Absent.

The pipe fitting 12 of the present invention can be modified in various ways, for example, without the fastening ring 50, depending on the type of pipe to be connected.

[0067]

[Effect of device]

 With the above-described configuration of the pipe fitting of the present invention, it is possible to make it difficult for the rod nut and the rod washer to rotate in the bracket, and moreover, the shapes of the bolt, the hole of the rod washer, and the screw hole of the rod nut are Since the bolt has a shape that can be easily inserted into the hole of the rod washer and the screw hole of the rod nut, it is not necessary to position the rod nut and rod washer, and moreover, it can be attached to the outer circumference of the pipe in a single operation in a short time. It was possible to provide a fitting for the pipe that could do the work.

Also, since the ends of the casing can be freely opened and closed, it is possible to attach the connected pipes to the outer periphery thereof without disconnecting them.

Further, the sleeve arranged inside the casing of the fitting for the pipe is made into a cylindrical shape by engaging a V-shaped projecting end and a V-shaped notch end shaped to fit the projecting end. Since it is configured like a pipe, the joint between the sleeve ends when tightened on the outer circumference of the pipe is good, and even if it is used for pipe fittings and pipe repair, leakage of fluid such as liquid or gas conveyed in the pipe will occur. It was possible to provide a tube fitting that does not have any problems.

Further, since a plurality of bulging portions that are pressed against the outer circumference of the pipe are provided in the sleeve, even if two types of pipes having different outer diameters are connected, it is possible to use a small-diameter pipe that is relatively susceptible to leakage. It was possible to completely prevent leakage from between the sleeves, and it was possible to provide a pipe fitting in which fluid such as liquid or gas does not leak from the gap between the outer circumference of the pipe and the sleeve.

[0071]

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a fitting for a pipe according to an embodiment of the present invention.

FIG. 2 is a front view showing a casing of a pipe fitting of the present invention.

FIG. 3 is a schematic cross-sectional view taken along the line III-III of FIG.

4 is a schematic cross-sectional view taken along line IV-IV of FIG.

FIG. 5 is a front view showing a modified example of a casing of a fitting for a pipe.

6 is a schematic cross-sectional view taken along line VI-VI of FIG.

FIG. 7 is a schematic cross-sectional view showing a modified example of the sleeve.

FIG. 8 is an enlarged sectional view of a compartment portion of the sleeve.

FIG. 9 is a schematic cross-sectional view of another tube fitting of the present invention attached to the tube.

FIG. 10 is a sectional view of an essential part of an end portion of the casing.

FIG. 11 is a perspective view showing a conventional pipe joint, (A)
Is an overall perspective view, and (B) is a schematic view of a main part of a bracket portion.

[Explanation of symbols]

 12 Pipe fittings 14 Casing 14a, 14b Ends (of casing) 15 (15a, 15b) Plate-like body 16 Hinge 18a, 18b Tongue piece 20 (20a, 20b) Bracket 22 Indentation portion 24 Rod washer 26 Bar nut 27 Seat Grip 28 Bolt 30 Opening (of bracket) 31 Opening 32 Slide plate 34 Protective plate 36 Flange 40 Sleeve 40a Projecting end (sleeve) 40b Notched end (sleeve) 42 One bulging part 44 Other bulging part 44 'Other bulging parts 46, 46, 46a, 46b Tongue-shaped part 47, 47 Flow path 48, 48, 48a, 48b Projection part 49, 49 Partition chamber 50 Fastening ring 52 Teeth 54 Auxiliary plate 60 Ring

Claims (7)

[Scope of utility model registration request] 1. A substantially cylindrical casing is formed by facing both ends of a curved plate-shaped body, and flanges projecting toward the center of the casing are provided on both opening edges of the casing.
Further, a cylindrical sleeve is arranged in the casing, and brackets for supporting a bar nut and a bar washer are respectively provided at the both ends, and a bar nut having a female screw is fitted and inserted into one of the brackets, and the other bracket is attached to the other bracket. , A rod washer having a hole formed slightly larger than the outer diameter of the bolt is inserted and inserted into the bracket, and an opening communicating with the hole of the rod washer and an opening communicating with the screw hole of the rod nut are formed, While inserting a bolt into the hole of the rod washer through the opening, screw the tip of the bolt into the screw hole of the rod nut,
A plate body that extends over the bolt between both ends of the casing, and that is curved on the inner wall of one end of the casing with substantially the same curvature as the inner circumference of the casing and inscribes the inner wall of the other end. In a fitting for a pipe formed by fixing a slide plate made of, an outer wall of the bracket of 2 is crushed to form an indentation portion,
A pipe fitting characterized by being provided so that the inner wall surface of the bracket is pressed against the rod flange and the rod nut supported in the bracket by the indentation portion. 2. The casing is formed into a substantially cylindrical shape by confronting the ends of one curved plate-shaped body, and the flanges formed at the opening edges of both ends of the cylindrical casing are symmetrical to each other. The fitting for a pipe according to claim 1, wherein one or a plurality of notches are respectively provided, and the ends of the casings arranged facing each other can be freely opened and closed. 3. The casing has two curved plate-shaped bodies, one end of which is connected to each other through a hinge, and the other ends of which face each other to form a substantially cylindrical shape. The inner wall surface of the connecting portion of the two plate-shaped bodies connected by the above-described method is covered with a protective plate that is curved with substantially the same curvature as the plate-shaped body, and one end of the protective plate is one of the two plate-shaped bodies. The fitting for a pipe according to claim 1, wherein the fitting is fixed to one inner wall surface. 4. The sleeve is V-shaped in a width direction of the sleeve.
A notched end that is notched in a V shape and a V-shaped projecting end that fits into this are engaged to form a cylindrical shape, and the joints at both ends of the sleeve are formed on the inner wall surface of the casing that is inscribed in the slide plate. The pipe fitting according to any one of claims 1 to 3, wherein the pipe fitting is arranged on an inner wall surface other than the inner wall surface. 5. The bolt has a conical shape or a truncated cone shape in which the tip portion is gradually thinned and changed in cross section, and the hole of the rod washer and the rod nut into which the bolt is inserted and the screw hole inlet peripheral edge are formed. The fitting for a pipe according to any one of claims 1 to 4, wherein a counterbore-like spot facing the hole of the bar washer and the screw hole of the bar nut is provided. 6. A large-diameter pipe and a small-diameter pipe having different outer diameters can be inserted into both end openings of the sleeve, the both end openings of the sleeve are formed with different inner diameters, and the inner peripheral edges of the both end openings of the sleeve are formed. Forming a tongue-shaped portion projecting from one end side of both inner peripheral edges to the opening direction of the other end side, and further forming an inner peripheral surface near the inner peripheral edge of the both-end opening of the sleeve at the tip of the tongue-shaped portion. Bulge in the direction to form an annular protrusion that is continuous in the circumferential direction on the sleeve inner peripheral surface, and the sleeve inner periphery between the protrusions bulges in the center direction of the sleeve, A plurality of annular bulging portions, which are in pressure contact with the outer circumference of the small-diameter pipe inserted into the sleeve and which are continuous in the circumferential direction of the sleeve inner peripheral surface and have a substantially rectangular cross section, are formed. Inside, one side of the bulge is pressed against the end face of the large diameter pipe. 6. The contact member is formed so as to be freely contactable, and the other bulging portion is formed between the one bulging portion and the small-diameter-tube-side protruding portion so as to be inclined toward the large-diameter pipe end surface direction. The fitting for a pipe according to item 1. 7. The fitting for a pipe according to claim 6, wherein the other bulging portions are formed in a plurality of rows.