JP2572368Y2 - Piping connection device - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention can easily and surely connect various steel pipes mainly used as pipe materials buried underground to accommodate communication cables, power cables and the like. The present invention relates to a pipe connection device capable of being disassembled and separated if there is a pipe connection.

[0002]

2. Description of the Related Art Conventionally, various pipe connecting devices have been used to connect pipe materials made of galvanized steel pipes for underground wires. A center ring for positioning the connection ends mutually is provided on the inner circumference, and a cylindrical joint body into which mutual pipes are inserted from both ends of the opening, a packing fitted to the outer circumference of the pipe, a push ring, and a ring shape in which a plurality of steel balls are arranged Each of the retainers is forcibly fitted to the outer periphery of the pipe while being pressed through an inclined pressing surface having a gradually decreasing diameter as it reaches the connection side end, and comprises a pair of sockets connected to both ends of the joint body. There is as a structure.

Further, in a pipe joint disclosed in Japanese Utility Model Laid-Open Publication No. 63-137195, a pair of sockets in a pipe connection device comprising a joint body and a pair of sockets are male and female. A sealing member and a spring that elastically expands and contracts radially are interposed between the male and female coupling surfaces to forcibly connect the male and female coupling surfaces.

[0004]

However, in the conventional pipe connection device described above, each of the sockets is forcibly slid toward the connection center after the pipe is inserted into the joint body. For this reason, it is often difficult to work, and the pipes cannot be firmly connected unless they are slid securely and connected to the joint body. In addition, if it is necessary to separate each of the pipes after connection once, forcibly insert a wedge-shaped disassembly member on the inner peripheral surface of the socket and forcibly expand the socket, The pipe had to be pulled out, and the work for that was extremely troublesome, and the socket after disassembly could not be reused at all, which wasted resources.

[0005] Furthermore, Japanese Utility Model Application Laid-Open No. 63-137195, in which a pair of sockets are firmly bonded to each other, is disclosed in
The extra work of separating the sockets from each other took extra time and was even more troublesome.

[0006] In particular, the connection of these underground pipe materials is
Work is often performed in manholes or other narrow places, and a sufficient work space is not secured. Therefore, the above-described conventional pipe connection device requires cumbersome handling, which hinders work efficiency. In addition, it is more difficult to secure the working space of a pipe connection device that is connected by a screw-in type. After being buried in the ground due to the screw portion formed in the member, the rust prevention treatment was invalidated, corrosion proceeded, and the stored cables were also damaged.

In view of the above, the present invention has been devised in view of the above-described various circumstances, and can easily and quickly connect the pipes securely and firmly, and even in a narrow work place. It can be handled easily, greatly improving work efficiency.If necessary, pipes can be disassembled and separated.
It is an object of the present invention to provide a pipe connection device that can be reused.

[0008]

According to the present invention, in order to achieve the above-described object, a large bulge formed by slightly bulging outwardly at a connection center position of the pipes P to be connected substantially in a butt shape. A tubular joint body 1 having a diameter portion and a pressing cylinder portion 5 having a diameter gradually reduced from the large diameter portion to the connection opening end side, and the pipe P inserted into the joint body 1 The joint body 1 has a plurality of press-fit balls 12 which are press-fitted into the gap between the outer peripheral side surface and the inner peripheral side surface of the joint body 1 and connect the joint body 1 and the pipe P, and are slidable in the pipe direction along the outer periphery of the pipe P, A substantially cylindrical slide stopper 10 disposed at the open end of the joint body 1, the slide stopper 10 is surrounded by the outer periphery of the pipe P and positioned, and is detachably engageable with the open end of the joint body 1. Telescopic ring-shaped stopper It is obtained by a ring 16.

A center ring 2 is provided at the connection center position of the joint main body 1, and a substantially cylindrical rigid spacer 4 surrounding the pipe P is arranged on both sides of the center ring 2.

The slide stopper 10 is a ring-shaped control ring 11 which is disposed around the outer peripheral surface of the pipe P.
And a plurality of divided press-fit guide pieces 13 connected to the control ring 11 and having a press-fit ball 12 at a front portion. The press-fit balls 12 are provided at appropriate intervals along the outer circumference of the pipe P. It is arranged, slides in the pressing cylinder 5 of the joint body 1, and the outer peripheral side of the pipe P and the pressing cylinder 5
Can be forcibly press-fitted into the gap with the inner peripheral side surface of the main body.

The press-fitting guide piece 13 itself is appropriately formed in a band shape having a width, and has a groove-shaped connecting groove 14 into which the control ring 11 is fitted on a stepped surface protruding from the rear portion. A holding hole 15 for holding the holding member 12 in a state in which the removal of the holding member 12 is prevented can be provided at the front portion.

Further, as the press-fitting guide piece 13 itself, several kinds having different widths can be formed and prepared in advance.

[0013]

In the pipe connection device according to the present invention, the center ring 2 provided at the connection center position of the bulged large diameter portion of the joint body 1 abuts the connection position of the pipe P to be connected to each other. The substantially cylindrical spacers 4 which are regulated and arranged on both sides of the center ring 2 maintain the straight connection of each of the pipes P inserted and connected.

A pipe P to be connected is inserted inside, and a slide stopper 10 surrounding the pipe P slides toward the connection center side in the joint body 1 with the insertion of the pipe P, and also presses the press-fit ball 12 into the pressing cylinder. Slide in part 5. At this time, the gap of the pressing cylindrical portion 5 gradually increasing in diameter as it reaches the connection center position of the joint main body 1 allows the press-fit ball 12 to retreat to the outside of the joint main body 1 and smoothly slide.

When the slide stopper 10 is pulled back after the slide of the pipe P is inserted, the slide stopper 10 is moved to the heald opening end side of the joint body 1 while the press-fit ball 12 at the front of the press-fit guide piece 13 is slid in the press cylinder 5. As a result, the pressure is forcibly pressed into the gap between the inner peripheral side surface of the pressing cylinder portion 5 and the outer peripheral side surface of the pipe P, which gradually becomes smaller. At this time, even if the plurality of press-fitting guide pieces 13 linked to the control ring 11 have a tubular shape by the entire press-fitting guide pieces 13, their separated front portions are separated from each other, expanded, and press-fitted. Ball 1
2 is smoothly pressed into the gap between the inner peripheral side surface of the joint body 1 and the outer peripheral side surface of the pipe P.

When the stopper ring 16 expands and contracts, it is located on the outer periphery of the open end tubular portion 6 of the joint body 1 so that the slide stopper 10 enters the joint body 1 when the slide stopper 10 is extended.
Allow pullback. Also, at the time of contraction, the slide stopper 10 is retracted from the inside of the joint body 1 and is inserted and arranged in a recess between the rear part of each of the press-fitting guide pieces 13 of the slide stopper 10 and the joint body 1.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a pipe line made of galvanized steel pipe for an underground wire to be interconnected. The connection end of the pipe P is inserted, and is a tubular joint body straddling these Ps.

The joint body 1 is formed of a rigid material such as a steel pipe, for example, and has a large diameter portion whose connection center position, which is a portion to which the open end of the pipe P is connected, is slightly bulged outward. Have. A ring-shaped center ring 2 made of, for example, neoprene rubber whose inner circumferential surface is formed in a mountain shape is fitted on the inner periphery of the connection center position of the large-diameter portion. A substantially cylindrical spacer 4 made of, for example, vinyl chloride resin and covered with a suitable packing material 3 for waterproofing is provided on the connection opening end side, and the center ring 2 and the spacer 4 are respectively connected to the joint body 1. Are housed in the swollen large-diameter portion. A pressing cylinder portion in which the peripheral wall portion from the end of the large diameter portion of the joint main body 1 to the open end of the joint main body 1 is gradually narrowed so as to gradually decrease in diameter, and the peripheral wall is inclined. 5 are formed. The open end of the joint body 1 is larger than the outer diameter of the pipe P to be connected.
An opening end cylindrical portion 6 having the same diameter as that of the press-fitting guide piece 13 and having a slightly larger thickness at an interval substantially equal to the thickness of the press-fitting guide piece 13 is formed.

The packing material 3 is closely arranged in a gap between the outer peripheral side surface of the pipe P to be inserted and connected and the inner peripheral side surface of the joint main body 1, and water, which intrudes from the open end cylindrical portion 6 of the joint main body 1,
Moisture and the like are prevented from entering the pipe P. Further, if necessary, the spacer 4 can be made to have a C-shape by cutting out a part thereof so as to be able to cope with the size of the pipe P diameter.

The joint body 1 has a plurality of press-fit balls 12 which are press-fitted into the gap between the outer peripheral side surface of the pipe P inserted into the joint body 1 and the inner peripheral side surface of the joint body 1 to connect the joint body 1 and the pipe P. It can slide in the pipe direction along the outer circumference of P,
A substantially cylindrical slide stopper 10 disposed at the open end of the joint body 1 and a pipe P
And a ring-shaped stopper ring 16 which is positioned at the outer periphery of the joint body 1 and is detachably engaged with the open end of the joint body 1.

As shown in FIGS. 3 and 4, the slide stopper 10 is provided with a ring-shaped control ring 11 which is provided around the outer peripheral surface of the pipe P, and is connected to the control ring 11 so that the slide stopper 10 has a front part. A plurality of press-fitting guide pieces 13 each having a press-fitting ball 12, wherein the press-fitting balls 12 are arranged at appropriate intervals along the outer periphery of the pipe P, and the end of the large-diameter portion in the joint body 1. Slides in the inclined pressing tube portion 5 from the opening to the opening end tube portion 6, and is forcibly pressed into the gap between the outer peripheral side surface of the pipe P inserted into the joint body 1 and the inner peripheral side surface of the pressing cylindrical portion 5. It is supposed to be.

The control ring 11 of the slide stopper 10 is formed of a wide ring-shaped rigid material such as steel having a diameter slightly larger than the outer diameter of the pipe P to be connected.

On the other hand, the press-fitting guide piece 13 itself is formed of, for example, a band-shaped polystyrene resin having an appropriate width, and has a groove-shaped connecting groove 14 into which the control ring 11 is fitted. Some have a holding hole 15 at a front portion for holding the press-fit ball 12 in a state where the press-fit ball 12 is prevented from being pulled out, and some do not have the holding hole 15. In addition, the press-in guide pieces 13 themselves are formed and prepared in advance with various types having different widths, and the control rings 11 having different diameters prepared separately corresponding to the outer diameters of the different pipes P are provided. The press-fitting guide pieces 13 having different widths and having or not having the press-fitting balls 12 are appropriately combined and fitted to the control ring 11 from the inside (see FIG. 4) to be assembled. In the drawing, a press-fit guide piece 13 having the same width is assembled by connecting to a control ring 11 with two press-fit balls 12 having a press-fit ball 12 interposed between those having a press-fit ball 12 (FIG. 3). When the control ring 11 is combined with the press-fit guide piece 13, the inner diameter of the press-fit guide piece 13 is set to be approximately equal to the outer diameter of the pipe P, and the outer diameter is set to be substantially equal to the inner diameter of the open end cylindrical portion 6 of the joint body 1. It is.

The distance between the upper edges of both side walls forming the connecting groove 14 is made slightly smaller than the width of the control ring 11, and the width gradually increases as the inner surface of the upper edge reaches upward. By doing so,
The press-fit guide piece 13 can be fitted to the control ring 11 with a single touch, facilitating assembling work such as replacement and reassembly performed as needed even at the work site.

On the other hand, the stopper ring 16 is formed of a band-shaped rubber material having an appropriate width into a ring shape.
When the slide stopper 2 is slid in the pressing cylinder 5 and the slide stopper 10 is pulled back to the connection opening end side, the press-fitting between the stepped portion of the press-fitting guide piece 13 projecting from the rear and the connection opening end of the joint body 1 is performed. The guide piece 13 is interposed on the outer peripheral surface position.
In the state where the joint body 1 is extended by its own elastic resilience, the joint body 1 is retracted from the position of the outer peripheral surface of the press-fitting guide piece 13.
Surrounding the outside of the open end tubular portion 6 (see FIG. 2A),
In the reduced state, the press-fitting guide piece 13 is wound around the outer periphery of the press-fitting guide piece 13 so as to be tightened by an elastic force (see FIG. 1).

In the embodiment configured as described above,
The procedure for connecting a predetermined pipe P will be described. As shown in FIG. 2, the slide stopper 10 is inserted into the joint body 1 from both ends of the opening, and the stopper ring 16 is extended to stop the stopper of the joint body 1. It is wound around the outer periphery of the ring 16 (see FIG. 2A).

Next, a pipe P to be connected is inserted from the connection opening end side, and the connection end is abutted against a center ring 2 located at the center of the joint main body 1. At this time, if necessary, a slide stopper 10 is attached. Although the pipe P is pushed into the connection center side of the joint body 1, when the pipe P is inserted, the connection end of the pipe P comes into contact with the press-fit ball 12, which is not subjected to any restrictions, and pushes the entire slide stopper 10. The push-in operation of 10 is not particularly required.

When the pipe P is sufficiently inserted, the slide stopper 10 is pulled back toward the connection opening end (see FIG. 2B), and the connection opening in the joint body 1 is moved while the press-fit ball 12 is slid in the pressing cylinder 5. It is forcibly press-fitted into the inner peripheral side surface of the joint main body 1 having a gradually decreasing diameter as it reaches the end side in a gap with the outer peripheral side surface of the pipe P. At this time,
The plurality of press-fitting guide pieces 13 are linked at the rear position by the control ring 11 so as to have a cylindrical shape as a whole. However, the front portions are separated from each other at the front portion because they are separated from each other, and the front portions are expanded. Then, the press-fit ball 12 is smoothly pressed into the gap between the inner peripheral surface of the joint body 1 and the outer peripheral surface of the pipe P.

The press-fit ball 12 pressed into the gap between the inner peripheral surface of the joint body 1 and the outer peripheral surface of the pipe P generated at this time.
Of the press-fit ball 1 surrounding the pipe P
These conditions are appropriately selected because they differ depending on the number of pieces 2 themselves, their intervals, the biting force against the press-fit ball 12 due to the pulling force generated in the pipe P itself, and the like.

After the slide stopper 10 has been sufficiently pulled back while the press-fit ball 12 is being press-fitted, the stopper ring 16 located at the outer periphery of the open end cylindrical portion 6 of the joint body 1 is connected to the stepped portion of the press-fit guide piece 13. It is inserted and arranged in a recess between the joint body 1 and the joint body 1 (see FIG. 2C) to prevent the slide stopper 10 from returning to the connection center side. By doing so, as shown in FIG.
The two are connected almost in abutting manner.

[0031]

[Effects of the Invention] The invention is configured as described above, and therefore, the pipes P can be securely and firmly connected to each other easily and quickly, and can be easily handled even in a narrow work place. The work efficiency can be dramatically improved, and if necessary, the pipes P can be disassembled and separated, and the members 1, 10, 16 are not damaged during the separation work, so that they can be reused and resources can be effectively used. Can be used.

That is, the present invention is based on the fact that the present invention provides a pressing cylinder portion having a gradually decreasing diameter as it reaches the opening end side on both sides of the large diameter portion provided at the connection position of the joint body 1 connecting the pipes P to each other. 5, a slide stopper 10 disposed in the joint body 1 is formed in a tubular shape composed of a plurality of press-fitting guide pieces 13 connected to a control ring 11 surrounding the pipe P. By sliding along the pipe P after insertion, the press-fit ball 12 at the front part of the press-fit guide piece 13 is pressed into the gap between the joint body 1 and the pipe P, and the slide stopper 10 surrounding the pipe P This is because the stopper ring 16 that is extendable and retractable is positioned and mounted between the rear portion and the opening end of the joint body 1, and thereby, the attachment and detachment of the stopper ring 16 and the slide stopper 10 Fitting body by each operation such id 1
The pipes P inserted therein can be connected to each other and can be easily separated.

Further, since the joint body 1 is provided with substantially cylindrical rigid spacers 4 on both sides of the center ring 2 provided at the connection center position of the bulged large diameter portion, the joint body 1 is mutually connected. The connection position of the pipes P to be connected is abutted and regulated to perform connection positioning, and the straight connection of each of the pipes P inserted and connected by the spacers 4 surrounding the pipes P can be maintained, for example, due to earth pressure or other external force. Prevents bending at the connection site.

Further, since the joint body 1 itself is obtained by swelling a part of a steel pipe material having a predetermined diameter outward to form a large diameter part, there is no thread part, and the joint body 1 is formed by hot-dip galvanizing. Even if the rust prevention treatment is performed, there is no problem in being buried underground, and the rust prevention property is excellent. In addition, the connection of the pipes P by the sliding operation of the slide spacer 10 with this 1 can be easily performed even in a narrow work site such as a manhole, so that the workability is excellent.

The slide stopper 10 provided in the joint body 1 includes a ring-shaped control ring 11 provided around the outer peripheral surface of the pipe P,
1 and a plurality of divided press-fitting guide pieces 13 each having a press-fitting ball 12 at the front, and is formed in a substantially cylindrical shape, so that a pipe P to be connected can be easily inserted into the inside. To a predetermined connection position of the joint body 1.
After insertion, the pipe P can be slid out of the connection opening end of the joint body 1, and the press-fit ball 12 is slid in the pressing tube portion 5 of the joint body 1 with the sliding. It can be forcibly pressed into the gap between the side surface and the inner peripheral side surface of the pressing cylinder portion 5 in a biting manner. for that reason,
The pipe P can be firmly and reliably connected to the inside of the joint main body 1, and in the connected state, the pulling force on the pipe P itself can move the press-fit ball 12 to the open end side of the joint main body 1. Therefore, the biting action of the press-fit ball 12 is further strengthened, and the connecting force is rather increased, so that the connected state is stabilized and ensured.

Further, since the press-fitting guide pieces 13 in the slide stopper 10 are connected to the control ring 11 in a divided state, each of the press-fitting guide pieces 13 is connected to the control ring 11 so that the press-in guide pieces 13 extend outward in the joint body 1 as the slide stopper 10 itself is pulled back. Even if it becomes radially widened, the separated front portions are separated from each other so that the press-fit ball 12 is smoothly pressed into the gap between the inner peripheral side surface of the joint body 1 and the outer peripheral side surface of the pipe P. It is.

Since the stopper ring 16 is formed in an expandable and contractible ring shape, it can be positioned on the outer periphery of the open end tubular portion 6 of the joint main body 1 by extending it. And no obstacles to entry and withdrawal work. Also, the joint body 1
The slide stopper 10 which has been retracted from the inside can be reduced so as to be inserted and disposed in a recess between the rear part of each of the press-fitting guide pieces 13 of the slide stopper 10 and the joint body 1. And the press-fitted state by the press-fit ball 12 can be maintained.

Further, in order to separate the connected pipes P from each other, the stopper ring 16 is extended to be positioned, for example, on the outer periphery of the open end tubular portion 6 of the joint body 1, and then the slide stopper 10 is inserted into the joint body 1. Re-enter, press-fit ball 1
By releasing the connection press-fitting state by 2, the pipe P can be easily pulled out from the inside of the joint main body 1, and at this time, any of the members 1, 10, and 16 is not damaged, so that it is possible to use again. There is also.

Several kinds of press-fit guide pieces 13 having different widths are formed and prepared in advance, and these are appropriately combined so that they are separately prepared corresponding to different outer diameters of the pipes P. The predetermined slide stopper 10 can be easily assembled and connected to the control ring 11 having different diameters via the groove-shaped connecting groove 14 of the press-fitting guide piece 13 itself, and versatility can be obtained. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a connection use state.

FIGS. 2A and 2B are cross-sectional views of a main part for explaining a work procedure at the time of connection work, in which (A) shows a state before a connection in which a stopper ring is expanded and moved to a connection center side, and (B) is a slide stopper; To the connection center side, with the pipe inserted,
(C) shows a state in which the slide stopper is pulled back.

FIG. 3 is a side sectional view of a slide stopper.

FIG. 4 is a front view of a main part of a slide stopper.

[Explanation of symbols]

P Piping 1 Joint body 2 Center ring 3 Packing material 4 Spacer 5 Pressing cylinder 6 Open end cylinder 10 Slide stopper 11 Control ring 12 Press-fit ball 13 Press-fit guide piece 14 Linking groove 15 Holding hole 16 Stopper ring

Claims (4)

(57) [Scope of request for utility model registration] A large-diameter portion formed by swelling slightly outward at a connection center position between pipes to be connected substantially in a butt shape, and extending from the large-diameter portion to a connection opening end side. Accordingly, a cylindrical joint body having a pressing cylindrical portion having a gradually decreasing diameter, and the outer peripheral side surface of the pipe inserted into the joint body and the inner peripheral side surface of the joint body are press-fitted to each other to connect the joint body and the pipe. It has a plurality of press-fit balls, is slidable in the pipe direction along the outer circumference of the pipe, and has a substantially cylindrical slide stopper disposed at the open end of the joint body. The slide stopper is surrounded by the outer circumference of the pipe. Positioning,
An elastic ring-shaped stopper ring which is detachably engageable with the open end of the joint body, the slide stopper is provided with a ring-shaped control ring surrounding and disposed on the outer peripheral surface of the pipe, and A plurality of divided press-fit guide pieces each having a press-fit ball at a front portion, the press-fit balls being arranged at appropriate intervals along the outer circumference of the pipe, and being connected to the control ring. A piping connection device, wherein the piping connection device is slid in a pressing cylinder portion and is forcibly pressed into a gap between an outer peripheral side surface of a pipe and an inner peripheral side surface of the pressing cylindrical portion. 2. The piping connection device according to claim 1, wherein a center ring is provided at a connection center position of the joint body, and a substantially cylindrical rigid spacer surrounding the pipe is disposed on both sides of the center ring. 3. The press-fitting guide piece itself is appropriately formed in a strip shape with a width, has a groove-shaped connecting groove in which a control ring is fitted, on a stepped surface protruding at a rear portion, and further includes a press-fitting ball. 3. The piping connection device according to claim 1, further comprising a holding hole in a front portion for holding the holding member in a state where the removal is prevented. 4. A plurality of press-fit guide pieces having different widths are formed and prepared in advance.
The piping connection device according to any one of the above.