CA2797176C

CA2797176C - One-touch pipe connection device

Info

Publication number: CA2797176C
Application number: CA2797176A
Authority: CA
Inventors: Sung-Hun Kim
Original assignee: WATER-TAKE Co Ltd
Current assignee: WATER-TAKE Co Ltd
Priority date: 2010-02-18
Filing date: 2011-02-16
Publication date: 2015-01-06
Anticipated expiration: 2031-02-16
Also published as: CA2797176A1; WO2011102637A2; WO2011102637A3

Abstract

A one-touch pipe connection device com prises a pressure wheel member equipped with an insertion hole, into which a pipe can be inserted and of which a diameter is increased gradually in the inserted direction of the pipe, and a circular rib formed on an outer side of the insertion hole reduced in diameter; a guide member spirally coupled with the circular rib; a support member that is arranged on the inner side of the guide member formed with inclined grooves, and forms a space for the arrangement of a compression spring;
contact members that are penetrated into and provided on the support member and are arranged in the inclined grooves, so that the contact members are contacted with the pipe by a restoring force of the compression spring; and a rubber packing tapered to be contacted with an inclined surface of the insertion hole of the pressure wheel member.

Description

[DESCRIPTION]
[Invention Title]
ONE-TOUCH PIPE CONNECTION DEVICE
[Technical Field]
The present invention relates to a pipe connection device, and more particularly to a one-touch pipe connection device capable of simply achieving connection between pipes while securing excellent watertightness and fixing force.
[Background Art]
In general, pipes having various sizes and shapes, and pipe joints are used to guide a fluid along a certain path. As a connection method for a combination of such pipes and pipe joints, a welding method is mainly used in that it provides excellent durability and watertightness at connection regions.
However, the welding method essentially requires securing of a certain space for a welding task to be carried out for connection of pipes.
Furthermore, even after pipe connection by welding, there is a problem in that a repair task, which should be carried out when detect is generated in association with the pipe connection, is very inconvenient. For example, when connection of pipes is carried out using a welding method, a space for a welding task should be essentially secured because welding should be achieved along outer circumferential edges of the pipes.
Generally, when the pipes are connected using welding, an annular pressing member is interposed between the pipes. In a subsequent defect repair task, separation and re-installation of the annular pressing member may be carried out. However, separation and re-installation of the annular pressing member are very difficult.
When pipes having different sizes are connected using flange coupling, welding coupling or the like, there is a problem in that an expensive pipe joint is separately provided.
In order to solve the above-mentioned problems, the applicant produced inventions, which are registered as Korean Patent No. 10-0899461 (hereinafter, referred to as "Patent 1") and Korean Patent No. 10-0927198 (hereinafter, referred to as "Patent 2").
However, each of the pipe connection devices in Patents 1 and 2 have a problem in that the pipe connection device is fixed to a pipe in accordance with fastening of outwardly-exposed bolts. That is, when the bolts are unfastened due to impact applied thereto, it is impossible to secure watertightness and fixing force at connected portions of the pipes. Also, there is a problem in that it is essentially required to firmly fasten a plurality of bolts and, as such, the fastening task is troublesome and takes a lot of time.
[Disclosure]
[Technical Problem]
Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a one-touch pipe connection device capable of simply achieving connection between pipes while securing excellent watertightness and fixing force under the condition that use of a fixing structure using bolts is minimized.
[Technical Solution]
In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of a one-touch pipe connection device including: an annular pressing member having a size to allow a pipe to be inserted thereinto while including an insertion hole formed at a central portion of the annular pressing member such that the insertion hole has a diameter gradually increasing in an insertion direction of the pipe, to have an inclined surface, a circular rib provided at a diameter-reduced end of the insertion hole, to form a through hole communicating with the insertion hole, the circular rib having threads formed at an inner circumferential surface thereof, a step formed between the insertion hole and the through hole, and a plurality of fastening holes formed through a circumferential portion of the annular pressing member in an axial direction of the annular pressing member while being spaced apart from one another in a circumferential direction, for coupling of bolts and nuts; a guide member including a seating portion threadedly coupled, at an outer circumferential surface thereof, with an inner circumferential surface of the circular rib such that the seating portion is in close contact with the step at an end of the seating portion, an inclined portion extending from the seating portion in a direction opposite to the circular rib while having an inclined groove formed at an inner surface of the inclined portion, the inclined portion being in contact, at one end thereof, with an end of the circular rib, and a straight portion extending axially from the inclined portion while having a greater diameter than the seating portion, the straight portion having a fitting groove formed at a free end of the straight portion, to fit a separation preventing ring therein; a support member having an opened shape to allow the pipe to extend therethrough while being axially inserted into the guide member, the support member including a plurality of fitting holes formed at a portion of the support member disposed to face the inclined portion, a first protrusion rib defining a sealed space for disposition of a compression spring with the straight portion and the other end of the inclined portion, the first protrusion rib being in contact with the separation preventing ring fitted in the fitting groove such that the first protrusion rib is prevented from being outwardly exposed, and a second protrusion rib formed to face the first protrusion rib such that a space for installation of the separation preventing ring is defined between the first protrusion rib and the second protrusion rib, to prevent the separation preventing ring from being outwardly separated; contact members each including a tooth portion to be fitted in a corresponding one of the fitting holes of the support member, and a protrusion portion extending from the tooth portion such that the protrusion portion is seated around the corresponding fitting hole, the protrusion portion coming into close contact with the inclined groove by resilience of the compression spring when the pipe is fitted in the annular pressing member, thereby causing teeth of the tooth portion to circumferentially come into close contact with an outer circumferential surface of the pipe; and a rubber packing having a tapered structure, to be in close contact with the inclined surface of the insertion hole of the annular pressing member.
[Advantageous Effects]

As described above, the one-touch pipe connection device according to the present invention has a structure in which, when a pipe is inserted toward the annular pressing member under the condition that the guide member, support member and contact members are installed at the annular pressing member, the contact members are firmly fixed to the outer circumferential surface of the pipe while coming into close contact with the inclined groove of the guide member by resilience of the compression spring. Accordingly, it is possible to simply achieve connection of pipes without using bolts. As a result, there is no phenomenon in which fixing force is reduced due to unfastening of bolts. The watertight member is interposed between the annular pressing member and the guide member such that the elastic portion of the watertight member encloses the outer circumferential surface of the pipe.
Accordingly, it is possible to additionally enhance watertightness by the watertight member, together with the rubber packing.
[Description of Drawings]
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIGS. 1 to 5 are views illustrating a one-touch pipe connection device according to a first embodiment of the present invention;
FIGS. 6 to 9 are views illustrating a one-touch pipe connection device according to a second embodiment of the present invention;
FIGS. 10 to 12 are views illustrating a one-touch pipe connection device according to a third embodiment of the present invention;
FIG. 13 is a perspective view illustrating an installed state of fixing members included in the one-touch pipe connection device according to the third embodiment of the present invention;
FIGS. 14 and 15 are views illustrating a one-touch pipe connection device according to a fourth embodiment of the present invention;
FIGS. 16 and 17 are views illustrating a one-touch pipe connection device according to a fifth embodiment of the present invention; and FIGS. 18 and 19 are views illustrating an installed state of a protection cap applicable to the one-touch pipe connection devices according to the third to fifth embodiment of the present invention.
[Best Model 5 In order to accomplish the above-described object, the present invention provides a one-touch pipe connection device including: an annular pressing member having a size to allow a pipe to be inserted thereinto while including an insertion hole formed at a central portion of the annular pressing member such that the insertion hole has a diameter gradually increasing in an insertion direction of the pipe, to have an inclined surface, a circular rib provided at a diameter-reduced end of the insertion hole, to form a through hole communicating with the insertion hole, the circular rib having threads formed at an inner circumferential surface thereof, a step formed between the insertion hole and the through hole, and a plurality of fastening holes formed through a circumferential portion of the annular pressing member in an axial direction of the annular pressing member while being spaced apart from one another in a circumferential direction, for coupling of bolts and nuts;
a guide member including a seating portion threadedly coupled, at an outer circumferential surface thereof, with an inner circumferential surface of the circular rib such that the seating portion is in close contact with the step at an end of the seating portion, an inclined portion extending from the seating portion in a direction opposite to the circular rib while having an inclined groove formed at an inner surface of the inclined portion, the inclined portion being in contact, at one end thereof, with an end of the circular rib, and a straight portion extending axially from the inclined portion while having a greater diameter than the seating portion, the straight portion having a fitting groove formed at a free end of the straight portion, to fit a separation preventing ring therein; a support member having an opened shape to allow the pipe to extend therethrough while being axially inserted into the guide member, the support member including a plurality of fitting holes formed at a portion of the support member disposed to face the inclined portion, a first protrusion rib defining a sealed space for disposition of a compression spring with the straight portion and the other end of the inclined portion, the first protrusion rib being in contact with the separation preventing ring fitted in the fitting groove such that the first protrusion rib is prevented from being outwardly exposed, and a second protrusion rib formed to face the first protrusion rib such that a space for installation of the separation preventing ring is defined between the first protrusion rib and the second protrusion rib, to prevent the separation preventing ring from being outwardly separated; contact members each including a tooth portion to be fitted in a corresponding one of the fitting holes of the support member, and a protrusion portion extending from the tooth portion such that the protrusion portion is seated around the corresponding fitting hole, the protrusion portion coming into close contact with the inclined groove by resilience of the compression spring when the pipe is fitted in the annular pressing member, thereby causing teeth of the tooth portion to circumferentially come into close contact with an outer circumferential surface of the pipe; and a rubber packing having a tapered structure, to be in close contact with the inclined surface of the insertion hole of the annular pressing member.
[Mode for Invention]
Hereinafter, a one-touch pipe connection device according to the present invention will be described with reference to the accompanying drawings.
FIGS. 1 to 3 are views illustrating a one-touch pipe connection device according to a first embodiment of the present invention.
The one-touch pipe connection device according to the present invention basically includes an annular pressing member 100 having a size to allow a pipe 10 to be inserted thereinto while including an insertion hole 101 having an inclined surface, and a circular rib 110 provided at a diameter-reduced end of the insertion hole 101, a guide member 200 threadedly coupled to the circular rib 110, a support member 300 disposed at the inside of the guide member 200, at which an inclined groove 221 is formed, to define a space for disposition of a compression spring 50, contact members 400 installed through the support member 300 while being disposed on the inclined groove 221, to be in close contact with the pipe 10 by resilience of the compression spring 50, and a rubber packing 500 having a tapered surface, to be in close contact with the inclined surface of the insertion hole 101 of the annular pressing member 100.
The annular pressing member 100, which a size to allow the conventional pipe 10 to be inserted thereinto, includes the insertion hole 101, which is formed at a central portion of the annular pressing member 100. The insertion hole 101 has a diameter gradually increasing in an insertion direction of the pipe 10 such that it has an inclined surface. The annular pressing member 100 also includes the circular rib 110, which extends from the diameter-reduced end of the insertion hole 101, to form a through hole 111 communicating with the insertion hole 101. A step 120 is formed between the insertion hole 101 and the through hole 111, to limit a movement range of the guide member 200, which will be described later. The circular rib 110 is formed, at an inner circumferential surface thereof, with threads to be coupled with the guide member 200. The annular pressing member 100 further includes a plurality of fastening holes 102 formed through a circumferential portion of the annular pressing member 100 while being spaced apart from one another in a circumferential direction, for coupling of bolts 20 and nuts 30.
In this case, as disclosed in Related Patents 1 and 2, the annular pressing member 100 may be coupled with a conventional flange by bolts 20 and nuts 30 under the condition that the rubber packing 500 is interposed between the annular pressing member 100 and the flange. Alternatively, for connection of pipes, the annular pressing member 100 may be mounted to each of the pipes under the condition that the rubber packing 500 is interposed between the annular pressing member 100 and the pipe, to which the rubber packing 500 is mounted.
The guide member 200 includes a seating portion 210 formed at one end of the guide member 200 such that the seating portion 210 is in close contact with the step 120 at an end thereof when an outer circumferential surface of the guide member 200 is threadedly coupled with the inner circumferential surface of the threaded circular rib 110. The guide member 200 also includes an inclined portion 220 extending from the seating portion 210 in a direction opposite to the circular rib 110. The inclined groove 221 is formed at an inner surface of the inclined portion 220. The inclined portion 220 is in contact, at one end thereof, with an end of the circular rib 110. The guide member 200 further includes a straight portion 230 extending from the inclined portion 220 in an axial direction. The straight portion 230 has a greater diameter than the seating portion 210. A fitting groove 231 is formed at a free end of the straight portion 230, to fit a separation preventing ring 40 therein. In accordance with this structure, the contact members 400, which will be described later in detail, are disposed at the inclined groove 221 of the inclined portion 220, and the compression spring 50 and separation preventing ring 40 are disposed at the straight portion 230, under the condition that the annular pressing member 100 and guide member 200 are connected in accordance with coupling of the seating portion 210 with the circular rib 110.
The support member 300 has an opened shape to allow the pipe 10 to extend therethrough. The support member 300 is axially inserted into the guide member 200. The support member 300 includes a plurality of fitting holes 301 formed at a portion of the support member 300, which is disposed to face the inclined portion 220. The support member 300 also includes a first protrusion rib 310 defining a sealed space for disposition of the compression spring 50 with the straight portion 230 and the other end of the inclined portion 220. The first protrusion rib 310 is in contact with the separation preventing ring 40 fitted in the fitting groove 231 such that the first protrusion rib 310 is prevented from being outwardly exposed. The support member 300 also includes a second protrusion rib 320 formed to face the first protrusion rib 310 such that a space for installation of the separation preventing ring 40 is defined between the first protrusion rib 310 and the second protrusion rib 320, so as to prevent the separation preventing ring from being outwardly separated.
In accordance with the above-described structure of the support member 300, when the support member 300 is inserted into the guide member 200, a portion of each contact member 400 fitted in the corresponding fitting hole 301 (a "tooth portion", which will be described later) is inserted into an inner space of the support member 300 through the fitting hole 301 and, as such, the contact member 400 reaches the inclined groove 221. The insertion of the support member 300 into the guide member 200 is limited by the compression spring 50. Under the condition that the support member 300 is pressed against the annular pressing member 100, the pipe 10 is inserted into the support member 300 such that it reaches the annular pressing member 100. When the pressing force applied to the support member 300 is subsequently released, the support member 300 is outwardly pushed by resilience of the compression spring 50 and, as such, the contact members 400 move along the inclined groove 221. As a result, the contact members 400 cannot further move in the inclined groove 221 while being in close contact with the pipe 10.
Meanwhile, the separation preventing ring 40 functions to prevent the support member 300 from being separated from the guide member 200. The separation preventing ring 40 is installed through a space defined between the first and second protrusion ribs 310 and 320. In other words, for installation of the separation preventing ring 40, the first protrusion rib 310 is disposed inside the guide member 200, and the second protrusion rib 320 is disposed to be outwardly exposed. Thereafter, the separation preventing ring 40 is installed around the fitting groove 231 of the guide member 200, using the space defined between the first and second protrusion ribs 310 and 320.
Hereinafter, a structure capable of achieving easier installation of the separation preventing ring 40 will be described. The separation preventing ring 40 includes a ring portion 41 to be fitted in the fitting groove 231. The ring portion 41 is cut to form opposite ends. The separation preventing ring 40 also includes engagement portions 42 respectively formed at the opposite ends of the ring portion 41. Also, an opened portion 201 is formed at the other end of the guide member 200, namely, the free end of the straight portion 230, to communicate with the fitting groove 231 such that the engagement portions 42 of the separation preventing ring 40 can be outwardly protruded through the opened portion 201. It is possible to easily fit the ring portion 41 of the separation preventing ring 40 by bending the ring portion 41 such that the engagement portions 42 are overlapped with each other at the opened portion 201, and then removing the bending force such that the engagement portions 42 are engaged with respective ends of the opened portion 201.
When the pipe connection device of the present invention is laid underground, the engagement portions 42 may be unnecessarily pressed by earth and sand, so that the ring portion 41 may be moved. In order to avoid such a phenomenon, a cutting line is formed between the ring portion 41 and each engagement portion 42, to allow the engagement portion 42 to be easily removed 5 after installation of the ring portion 41 in the fitting groove 231.
Each contact member 400 includes a tooth portion 410 to be fitted in a corresponding one of the fitting holes 301 of the support member 300, and a protrusion portion 420 extending from the tooth portion 410 such that it is seated around the corresponding fitting hole 301. When the pipe 10 is fitted in the annular 10 pressing member 100, the protrusion portion 420 circumferentially comes into close contact with the inclined groove 221 by resilience of the compression spring 50 such that teeth of the tooth portion 410 come into close contact with an outer circumferential surface of the pipe 10. In order to cause the tooth portion 410 to be uniformly in close contact with the pipe 10 throughout the teeth thereof, it is preferred that the contact member 400 and inclined groove 221 have shapes as in the associated drawings.
As shown in FIG. 4, a locking member 700 extends axially through the tooth portion 410 of each contact member 400. The locking member 700 includes a locking spring 710, and locking pins 720 respectively fixed to opposite ends of the locking spring 710. The locking pins 720 of the locking member 700 are inserted into pin holes 301a respectively formed at opposite portions of an inner surface of the corresponding fitting hole 301, to prevent the contact member 400 from being separated from the fitting hole 301. Thus, it is possible to prevent the contact members 400 from being separated from respective fitting holes 301 during installation of the guide member 200 at the support member 300. Also, there is no problem in bringing the tooth portion 410 of each contact member 400 into close contact with the pipe 10 and bringing the protrusion portion 420 of each contact member 400 into close contact with the inclined groove 221, by virtue of ductility provided by the corresponding locking spring 710.
As shown in FIG. 5, the rubber packing 500 has a tapered structure at one or each of the opposite sides thereof such that it can come into close contact with the inclined surface of the insertion hole 101 of the annular pressing member 100.
As disclosed in Patents 1 and 2, the rubber packing 500 is pressed in accordance with coupling between the annular pressing member 100 and a conventional flange or coupling between two annular pressing members 100 using bolts 20 and nuts 30, to secure watertightness in connection between pipes.
Additionally, more excellent watertightness may be provided by the watertight member 600. The watertight member 600 includes a body 610 disposed on a step surface 211 formed at an inner circumferential surface of the seating portion 210, an elastic portion 620 extending inwardly from the body 610, and an extension portion 630 extending outwardly from an end of the body 610 in a radial direction such that the extension portion 630 is interposed between the seating portion 210 and the step 120. When the pipe 10 is moved toward the annular pressing member 100, the elastic portion 620 comes into close contact with the outer circumferential surface of the pipe 10 while moving toward the insertion hole 101 in accordance with the movement of the pipe 10.
In this case, the watertight member 600 is made of an elastic material such as rubber. Accordingly, as the extension portion 630 is pressed by the seating portion 210 and step 120, the watertight member 600 can be maintained in a firmly fixed state.
FIGS. 6 to 9 are views illustrating a one-touch pipe connection device according to a second embodiment of the present invention.
The one-touch pipe connection device according to the second embodiment of the present invention includes a cylindrical member 800 used in place of the annular pressing member 100, a guide member 200 threadedly coupled to the cylindrical member 800, a support member 300 disposed at the inside of the guide member 200, at which an inclined groove 221 is formed, to define a space for disposition of a compression spring 50, and contact members 400 installed through the support member 300 while being disposed on the inclined groove 221, to be in close contact with the pipe 10 by resilience of the compression spring 50.
For reference, the guide member 200, support member 300 and contact members 400, which are connected to the cylindrical member 800 and will be described hereinafter, are identical to those of the above-described pipe connection device of the present invention and, as such, no description will be given of the detailed operations thereof.
The cylindrical member 800 has a size to allow the pipe 10 to be inserted thereinto. Threads are formed at an inner circumferential surface of the cylindrical member 800. Two assemblies each including the guide member 200, support member 300 and contact members 400 are installed at a pair of pipes 10, respectively, such that the cylindrical member 800 is interposed between the assemblies, to connect the pipes 10.
The cylindrical member 800 is provided with an insertion limitation rib 810 centrally formed at the inner circumferential surface of the cylindrical member 800, to limit the lengths of the pipes 10 inserted into opposite sides of the cylindrical member 800. Accordingly, the pipes 10, each of which includes a straight pipe, a bent pipe, or the like, can be inserted into the cylindrical member 800 by the same length.
The guide member 200 includes a seating portion 210 threadedly coupled, at an outer circumferential surface thereof, with the inner circumferential surface of the cylindrical member 800. The guide member 200 also includes an inclined portion 220 extending from the seating portion 210 in a direction opposite to the cylindrical member 800. An inclined groove 221 is formed at an inner surface of the inclined portion 220. The inclined portion 220 is in contact, at one end thereof, with an end of the cylindrical member 800. The guide member 200 further includes a straight portion 230 extending from the inclined portion 220 in an axial direction. The straight portion 230 has a greater diameter than the seating portion 210. A fitting groove 231 is formed at a free end of the straight portion 230, to fit a separation preventing ring 40 therein.
In this case, the watertight member 600, which is used in the first embodiment of the present invention, may be installed at the guide member 200.

When the cylindrical member 800 and guide member 200 are coupled, the extension portion 630 of the watertight member 600 can be maintained in a firmly fixed state by the end of the seating portion 210 and the insertion limitation rib 810.

The support member 300 has an opened shape to allow the pipe 10 to extend therethrough. The support member 300 is axially inserted into the guide member 200. The support member 300 includes a plurality of fitting holes 301 formed at a portion of the support member 300, which is disposed to face the inclined portion 220. The support member 300 also includes a first protrusion rib 310 defining a sealed space for disposition of the compression spring 50 with the straight portion 230 and the other end of the inclined portion 220. The first protrusion rib 310 is in contact with the separation preventing ring 40 fitted in the fitting groove 231 such that the first protrusion rib 310 is prevented from being outwardly exposed. The support member 300 also includes a second protrusion rib 320 formed to face the first protrusion rib 310 such that a space for installation of the separation preventing ring 40 is defined between the first protrusion rib 310 and the second protrusion rib 320, so as to prevent the separation preventing ring from being outwardly separated.
Each contact member 400 includes a tooth portion 410 to be fitted in a corresponding one of the fitting holes 301 of the support member 300, and a protrusion portion 420 extending from the tooth portion 410 such that it is seated around the corresponding fitting hole 301. When the pipe 10 is fitted in the cylindrical member 800, the protrusion portion 420 comes into close contact with the inclined groove 221 by resilience of the compression spring 50 such that teeth of the tooth portion 410 circumferentially come into close contact with an outer circumferential surface of the pipe 10.
FIGS. 10 to 12 are views illustrating a one-touch pipe connection device according to a third embodiment of the present invention.
The one-touch pipe connection device according to the third embodiment of the present invention basically includes a fastening member 100C having a size to allow a pipe 10C to be inserted thereinto while including first hooks 110C
provided at an outer circumferential surface of the fastening member 100C, a guide member 200C coupled to the fastening member 100C,a support member 300C disposed at the inside of the guide member 200C, at which an inclined groove 221C is formed, to define a space for disposition of a compression spring 30C, and contact members 400C installed through the support member 300C while being disposed on the inclined groove 221C, to be in close contact with the pipe 10C by resilience of the compression spring 30C. The one-touch pipe connection device also includes a connecting member 500C, which receives an end of the pipe 10C inserted into the fastening member 100C and is provided with second hooks 510C formed on an outer circumferential surface of the connecting member 500C at opposite sides of the connecting member 500C, and connecting bars 600C each connecting aligned ones of the first and second hooks 110C and 510C while allowing the pipe 10C
and connecting member 500C to be movable within a predetermined range by impact applied thereto.
The fastening member 100C has a size to allow the pipe 10C to be inserted thereinto. Threads are formed at an inner circumferential surface of the fastening member 100C, to enable the fastening member 100C to be threadedly coupled with the guide member 200C. Two assemblies each including the fastening member 100C, guide member 200C, support member 300C and contact members 400C are installed at two pipes aligned at opposite sides of the connecting member 500C, respectively, to connect the pipes. Meanwhile, the first hooks 110C, which are provided at the outer circumferential surface of the fastening member 100C, are bent toward the guide member 200C, to form a "1" shape. Each first hook 110C is connected with a corresponding one of the second hooks 510C provided at the connecting member 500C by one connecting bar 600C. When strong impact such as in an earthquake is encountered, the pipes 10C are movable in accordance with the connection by the connecting bars 600C. In this case, accordingly, it is possible to prevent the pipes 10C from being damaged.
The guide member 200C includes a seating portion 210C threadedly coupled, at an outer circumferential surface thereof, with the inner circumferential surface of the fastening member 100C. The guide member 200C also includes an inclined portion 220C extending from the seating portion 210C in a direction opposite to the fastening member 100C. An inclined groove 221C is formed at an inner surface of the inclined portion 220C. The inclined portion 220C is in contact, at one end thereof, with an end of the fastening member 100C. The guide member 200C further includes a straight portion 230C extending from the inclined portion 220C in an axial direction. The straight portion 230C has a greater diameter than the seating portion 210C. A fitting groove 231C is formed at a free end of the straight portion 230C, to fit a separation preventing ring 20C therein. In 5 accordance with this structure, the contact members 400C are disposed at the inclined groove 221C of the inclined portion 220C, and the separation preventing ring 20C and compression spring 30C are disposed at the straight portion 230C, under the condition that the fastening member 100C and guide member 200C are threadedly coupled.
10 The support member 300C has an opened shape to allow the pipe 10C to extend therethrough. The support member 300C is axially inserted into the guide member 200C. The support member 300C includes a plurality of fitting holes 301C formed at a portion of the support member 300C, which is disposed to face the inclined portion 220C. The support member 300C also includes a first protrusion 15 rib 310C
defining a sealed space for disposition of the compression spring 30C with the straight portion 230C and the other end of the inclined portion 220C. The first protrusion rib 310C is in contact with the separation preventing ring 20C
fitted in the fitting groove 231C such that the first protrusion rib 310C is prevented from being outwardly exposed. The support member 300C also includes a second protrusion rib 320C formed to face the first protrusion rib 310C such that a space for installation of the separation preventing ring 20C is defined between the first protrusion rib 310C and the second protrusion rib 320C, so as to prevent the separation preventing ring 20C from being outwardly separated.
In accordance with the structure of the support member 300C, when the support member 300C is inserted into the guide member 200C, a portion of each contact member 400C (namely, the tooth portion), which is fitted in the corresponding fitting hole 301, is protruded into an inner space of the support member 300C. Accordingly, each contact member 400C can reach the inclined groove 221C. Further insertion of the support member 300C into the guide member 200C is restricted by the compression spring 30C. The pipe 10C is then inserted into the support member 300C until it passes through the fastening member 100C under the condition that the support member 300C is pressed against the fastening member 100C. When pressure applied to the support member 300C is released in the above state, the support member 300C is retracted by the resilience of the compression spring 30C, thereby causing each contact member 400C to move along the inclined groove 221C. Finally, each contact member 400C can no longer move along the inclined groove 221C. In this state, each contact member 400C
is in close contact with the pipe 10C.
Meanwhile, the separation preventing ring 20C functions to prevent the support member 300C from being separated from the guide member 200C. The separation preventing ring 20C is installed in a space defined between the first and second protrusion ribs 310C and 320C. In detail, the support member 300C is positioned such that the first protrusion rib 310C is positioned at the inside of the guide member 200C, and the second protrusion rib 320C is outwardly exposed.
Thereafter, the separation preventing ring 20C is inserted into a space defined between the first and second protrusion ribs 310C and 320C such that it is installed in the fitting groove 231C of the guide member 200C.
In this case, the separation preventing ring 20C is cut to form opposite ends.

It is possible to install the separation preventing ring 20C in the fitting groove 231C
by bending the separation preventing ring 20C using external force, and then removing the external force after fitting the bent separation preventing ring 20C in the fitting groove 231C.
Each contact member 400C includes a tooth portion 410C to be fitted in the corresponding fitting hole 301C of the support member 300C, and a protrusion portion 420C extending from the tooth portion 410C such that it is seated around the corresponding fitting hole 301C. When the pipe 10C is fitted in the fastening member 100C, the protrusion portion 420C comes into close contact with the inclined groove 221C by resilience of the compression spring 30C such that teeth of the tooth portion 410C circumferentially comes into close contact with an outer circumferential surface of the pipe 10C. In order to cause the tooth portion 410C to be uniformly in close contact with the pipe 10C throughout the teeth thereof, it is preferred that the contact member 400C and inclined groove 221C have shapes as in the associated drawings.
One end of the pipe 10C installed through the support member 300C is inserted into the connecting member 500C. Grooves 501C are formed at an inner circumferential surface of the connecting member 500C at opposite sides of the connecting member 500C, respectively, in order to allow an annular rubber packing 40C to be interposed between the pipe 10C and each side of the connecting member 500C. As described above, the second hooks 510C of the connecting member 500C are formed on the outer circumferential surface of the connecting member 500C at opposite sides of the connecting member 500C. Each second hook 510C
is bent to have a "-1" shape. The pipe 10C is inserted into the pipe connection device such that an end of the pipe 10C is positioned at the inside of the connecting member 500C (preferably, an inner middle portion) in a state in which the fastening member 100C, guide member 200C, support member 300C and contact members 400C are fixed to the pipe 10C. Thereafter, the connecting bars 600C are coupled to the first and second hooks 110C and 510C provided at the fastening member 100C and connecting member 500C. In this state, the pipe 10C is laid underground. Although the pipe 10C laid underground is not moved in a normal state, it is movable within a certain range corresponding to the sizes of the connecting member 500C and connecting bars 600C without being separated from the connecting member 500C when great impact such as earthquake is applied thereto.
For reference, the connecting member 500C may have a curved shape, a T
shape or the like without being limited to a straight shape as shown in the associated drawings. Thus, it is possible to freely connect pipes to form linear, curved or angled piping.
Each connecting bar 600C includes first and second coupling rings 610C
and 620C to be coupled to the aligned first and second hooks 110C and 510C, respectively, and a body 630C connecting the first and second coupling rings and 620C. The connecting bars 600C are installed to connect the fastening member 100C, to which the guide member 200C, support member 300C and contact members 400C are coupled, and the connecting member 500C under the condition that the first and second hooks 110C and 510C are spaced apart from each other by a maximum distance. Thus, the pipe connection device of the present invention exhibits excellent earthquake resistance. In accordance with the size of the first and second coupling rings 610C and 620C, the range of movement of the pipe 10C
caused by impact can be increased or decreased.
FIG. 13 is a view illustrating an installed state of fixing members included in the one-touch pipe connection device according to the present invention.
A pair of fixing members 700C may be used to be arranged opposite to the fastening member 100C with reference to the connecting member 500C. The fixing members 700C enclose the outer circumferential surface of the pipe inserted into the connecting member 500C toward the fastening member 100C such that each fixing member 700C covers 1/2 of the outer circumferential surface of the pipe.
Each fixing member 700C is provided, at opposite ends thereof, with third hooks 710C to be coupled with the second coupling rings 620C of the connecting bars 600C, respectively. When two pipes are connected such that the connecting member 500C is interposed between the pipes, the fixing members 700C may be used to achieve cost reduction. In this case, the fastening member 100C, guide member 200C, support member 300C and contact members 400C may be installed at one pipe, whereas the fixing members 700C may be installed at the other pipe.
Meanwhile, when a pipe having an end with a diameter greater than that of other pipe portions is used, there may be a problem in fitting the fastening member 100C, guide member 200C and support member 300C. However, the fixing members 700C can be installed at such a pipe, irrespective of the diameter of the pipe end, because the fixing members 700C are of a separate type, which does not require insertion into the pipe.
Also, the material of the pipe connection device of the present invention is metal or plastic. Accordingly, in the case in which the first and second hooks and 510C and third hooks 710C are shaped to be elastically separably coupled to the first and second coupling rings 610C and 620C, as shown in the associated drawings, it is possible to prevent separation of the first and second coupling rings 610C and 620C when they are engaged with the first to third hooks 110C, 510C
and 710C, but to allow separation of the first and second coupling rings 610C and when an end of each hook is pulled by external force.
For reference, the fastening member 100C and connecting member 500C
provided with the first and second hooks 110C and 510C may be formed such that the outer circumferential surfaces thereof have a polygonal column structure, so as to enable easy rotation of the fastening member 100C and connecting member 500C.
In this case, each of the first and second hooks 110C and 510C may be provided at a flat surface of the corresponding polygonal column structure. In this case, the area, to which a lower end of each of the first and second hooks 110C and 510C is fixed, can be uniform, to achieve stable fixing. Also, the connecting member 500C may have a convex shape at a portion of the outer circumferential surface thereof, at which the second hooks 510C are provided, and may be formed with a groove at a portion of the inner circumferential surface thereof corresponding to the outer circumferential surface portion, to fit a rubber packing 40C in the groove.
FIGS. 14 and 15 are views illustrating a one-touch pipe connection device according to a fourth embodiment of the present invention.
The one-touch pipe connection device according to the fourth embodiment of the present invention includes a fastening member 100-1C having a size to allow a pipe 10C to be inserted thereinto while including threads formed at an inner circumferential surface of the fastening member 100-1C and first coupling ribs 1C provided at an outer circumferential surface of the fastening member 100-1C, a guide member 200C threadedly coupled to the fastening member 100-1C, a support member 300C disposed at the inside of the guide member 200C, at which an inclined groove 221C is formed, to define a space for disposition of a compression spring 30C, and contact members 400C installed through the support member 300C
while being disposed on the inclined groove 221C, to be in close contact with the pipe 10C by resilience of the compression spring 30C. The one-touch pipe connection device also includes a connecting member 500-1C, which receives an end of the pipe 10C inserted into the fastening member 100-1C and is provided with second coupling ribs 510-1C formed on an outer circumferential surface of the connecting member 500-1C at opposite sides of the connecting member 500-1C, and connecting bolts 600-1C each connecting aligned ones of the first and second coupling ribs 110-1C and 510-1C while being movable at one end thereof by impact applied thereto.
For reference, the guide member 200C, support member 300C and contact 5 members 400C of the fourth embodiment, which are connected to the fastening member 100-1C, have the same structures and function as those described above and, as such, no detailed description thereof will be given.
The fastening member 100-1C has a size to allow the pipe 10C to be inserted thereinto. Threads are formed at the inner circumferential surface of the 10 fastening member 100-1C. The first coupling ribs 110-1C, which are provided at the outer circumferential surface of the fastening member 100-1C, are formed with threaded holes 111-1C extending in an axial direction, respectively. Each connecting bolt 600-1C is threadedly coupled, at one end thereof, with the threaded hole 111-1C of the corresponding first coupling rib 110-1C. Thus, connection 15 between the fastening member 100-1C and the connecting member 500-1C is achieved.
One end of the pipe 10C installed through the support member 300C is inserted into the connecting member 500-1C. Grooves 501C are formed at an inner circumferential surface of the connecting member 500-1C at opposite sides of the 20 connecting member 500-1C, respectively, in order to allow an annular rubber packing 40C to be interposed between the pipe 10C and each side of the connecting member 500-1C. The second coupling ribs 510-1C, which are formed on an outer circumferential surface of the connecting member 500-1C at opposite sides of the connecting member 500-1C, are formed with slots 511-1C extending in a direction perpendicular to an axial direction of the connecting member 500-1C while having a length longer than the diameter of the threaded holes 111-1C, respectively. In accordance with this structure, the connecting member 500-1C is connected to the fastening member 100-1C by the connecting bolts 600-1C. Since each connecting bolt 600-1C is movable along a corresponding one of the slots 511-1C within a predetermined range, the connecting member 500-1C can be moved by impact within the predetermined range, together with two pipes fitted in the connecting member 500-1C at opposite ends of the connecting member 500-1C.
Each connecting bolt 600-1C includes a body 610-1C coupled, at one end thereof, to the threaded hole 111-1C of the corresponding first coupling rib after extending through the slot 511-1C of the second coupling rib 510-1C
aligned with the corresponding first coupling rib 110-1C, and a head 620-1C provided at the other end of the body 610-1C while having a diameter greater than the width of the slot 511-1C. Once the connecting bolt 600-1C is coupled with the first and second coupling ribs 110-1C and 510-1C, it is not separated from the second coupling rib 510-1C by virtue of the head 620-1C, which preferably has a ball shape. Since the body 610-1C is movable along the slot 511-1C, it is possible to reduce impact applied to the pipe 10C.
FIGS. 16 and 17 are views illustrating a one-touch pipe connection device according to a fifth embodiment of the present invention.
The one-touch pipe connection device according to the fifth embodiment of the present invention includes a fastening member 100-2C having a size to allow a pipe 10C to be inserted thereinto while including threads formed at an inner circumferential surface of the fastening member 100-2C and first coupling ribs 2C provided at an outer circumferential surface of the fastening member 100-2C, a guide member 200C threadedly coupled to the fastening member 100-2C, a support member 300C disposed at the inside of the guide member 200C, at which an inclined groove 221C is formed, to define a space for disposition of a compression spring 30C, and contact members 400C installed through the support member 300C

while being disposed on the inclined groove 221C, to be in close contact with the pipe 10C by resilience of the compression spring 30C. The one-touch pipe connection device also includes a connecting member 500-2C, which receives an end of the pipe 10C inserted into the fastening member 100-2C and is provided with second coupling ribs 510-2C formed on an outer circumferential surface of the connecting member 500-2C at opposite sides of the connecting member 500-2C, and coupling members 600-2C each connecting aligned ones of the first and second coupling ribs 110-2C and 510-2C while being movable at one end thereof by impact applied thereto.

For reference, the guide member 200C, support member 300C and contact members 400C of the fifth embodiment, which are connected to the fastening member 100-2C, have the same structures and function as those described above and, as such, no detailed description thereof will be given.
The fastening member 100-2C has a size to allow the pipe 10C to be inserted thereinto. Threads are formed at the inner circumferential surface of the fastening member 100-2C. The first coupling ribs 110-2C, which are provided at the outer circumferential surface of the fastening member 100-2C, are formed with slots 111-2C extending in a direction perpendicular to an axial direction of the fastening member 100-2C, respectively. Each coupling member 600-2C is fastened, at one end thereof, to the slot 111-2C of the corresponding first coupling rib 110-2C. Thus, connection between the fastening member 100-2C and the connecting member 500-2C is achieved.
One end of the pipe 10C installed through the support member 300C is inserted into the connecting member 500-2C. Grooves 501C are formed at an inner circumferential surface of the connecting member 500-2C at opposite sides of the connecting member 500-2C, respectively, in order to allow an annular rubber packing 40C to be interposed between the pipe 10C and each side of the connecting member 500-2C. The second coupling ribs 510-2C, which are formed on an outer circumferential surface of the connecting member 500-2C at opposite sides of the connecting member 500-2C, are formed with slots 511-2C extending in a direction perpendicular to an axial direction of the connecting member 500-2C, respectively.
In accordance with this structure, each coupling member 600-2C is movably connected to the corresponding first and second coupling ribs 110-2C and 510-2C.
Thus, the pipe connection device of the present invention exhibits excellent earthquake resistance.
Each coupling member 600-2C includes a rod 610-2C extending through the slots 111-2C and 511-2C of the aligned second and first coupling ribs 510-and 110-2C corresponding to the coupling member 600-2C while having a smaller diameter than the slots 111-2C and 511-2C, a head 620-2C provided at one end of the rod 610-2C while having a diameter greater than the width of the slot 511-2C, and a coupling nut 630-2C threadedly coupled to the other end of the rod 610-while having a size greater than the width of the slot 111-2C. In accordance with this structure, the coupling member 600-2C movably connects the fastening member 100-2C and connecting member 500-2C without being separated from the first and second coupling ribs 110-2c and 510-2C. Accordingly, the connecting member 500-2C is movable within a certain range when impact is applied to two pipes fitted in the connecting member 500-2C at opposite ends of the connecting member 500-2C.
Each of the connecting members 500C, 500-1C and 500-2C according to the third to fifth embodiments of the present invention is provided with an insertion limitation rib 520C to limit the lengths of pipes inserted into opposite sides of the connecting member. Accordingly, the pipes can be inserted into the connecting member at opposite sides of the connecting member by the same length.
Meanwhile, a protrusion 502C may be formed at one side of each groove 501C, and a groove may be formed at each rubber packing 40C, to receive the protrusion in order to minimize movement of the rubber packing 40C between the pipe 10C
and the groove 501C.
FIGS. 18 and 19 are views illustrating an installed state of a protection cap included in the one-touch pipe connection device of the present invention.
In each of the third to fifth embodiments of the present invention, a gap may be formed between the guide member 200C and the support member 300C in a state in which the guide member 200C and support member 300C are fitted around the pipe 10C. Foreign matter may be introduced through the gap. Due to such foreign matter, separation of the pipe connection device of the present invention may not be smoothly carried out. To this end, a protection cap 800C to seal the gap may be provided. Upon installation of the pipe connection device, the protection cap 800C is first fitted around the pipe 10C, and then the guide member 200C
and support member 300C are fitted around the pipe 10C. After fixing of the guide member 200C and support member 300C, the protection cap 800C is fixed to seal the gap.
Fixing of the protection cap 800C may be achieved by simply fitting the protection cap 800C around the outer circumferential surface of the guide member 200C or threadedly coupling the protection cap 800C to the outer circumferential surface of the guide member 200C.
[Industrial Applicability]
The one-touch pipe connection device according to the present invention has a structure in which, when a pipe is inserted toward the annular pressing member under the condition that the guide member, support member and contact members are installed at the annular pressing member, the contact members is firmly fixed to the outer circumferential surface of the pipe while coming into close contact with the inclined groove of the guide member by resilience of the compression spring.
Accordingly, it is possible to simply achieve connection of pipes without using bolts. As a result, there is no phenomenon in which fixing force is reduced due to unfastening of bolts. The watertight member is interposed between the annular pressing member and the guide member such that the elastic portion of the watertight member encloses the outer circumferential surface of the pipe.
Accordingly, it is possible to additionally enhance watertightness by the watertight member, together with the rubber packing.

Claims

1. A one-touch pipe connection device comprising:
an annular pressing member (100) having a size to allow a pipe (10) to be inserted thereinto while comprising an insertion hole (101) formed at a central portion of the annular pressing member (100) such that the insertion hole (101) has a diameter gradually increasing in an insertion direction of the pipe (10), to have an inclined surface, a circular rib (110) provided at a diameter-reduced end of the insertion hole (101), to form a through hole (111) communicating with the insertion hole (101), the circular rib (110) having threads formed at an inner circumferential surface thereof, a step (120) formed between the insertion hole (101) and the through hole (111), and a plurality of fastening holes (102) formed through a circumferential portion of the annular pressing member (100) in an axial direction of the annular pressing member (100) while being spaced apart from one another in a circumferential direction, for coupling of bolts (20) and nuts (30);
a guide member (200) comprising a seating portion (210) threadedly coupled, at an outer circumferential surface thereof, with an inner circumferential surface of the circular rib (110) such that the seating portion (210) is in close contact with the step (120) at an end of the seating portion (210), an inclined portion (220) extending from the seating portion (210) in a direction opposite to the circular rib (110) while having an inclined groove (221) formed at an inner surface of the inclined portion (220), the inclined portion (220) being in contact, at one end thereof, with an end of the circular rib (110), and a straight portion (230) extending axially from the inclined portion (220) while having a greater diameter than the seating portion (210), the straight portion (230) having a fitting groove (231) formed at a free end of the straight portion (230), to fit a separation preventing ring (40) therein;
a support member (300) having an opened shape to allow the pipe (10) to extend therethrough while being axially inserted into the guide member (200), the support member (300) comprising a plurality of fitting holes (301) formed at a portion of the support member (300) disposed to face the inclined portion (220), a first protrusion rib (310) defining a sealed space for disposition of a compression spring (50) with the straight portion (230) and the other end of the inclined portion (220), the first protrusion rib (310) being in contact with the separation preventing ring (40) fitted in the fitting groove (231) such that the first protrusion rib (310) is prevented from being outwardly exposed, and a second protrusion rib (320) formed to face the first protrusion rib (310) such that a space for installation of the separation preventing ring (40) is defined between the first protrusion rib (310) and the second protrusion rib (320), to prevent the separation preventing ring (40) from being outwardly separated;
contact members (400) each comprising a tooth portion (410) to be fitted in a corresponding one of the fitting holes (301) of the support member (300), and a protrusion portion (420) extending from the tooth portion (410) such that the protrusion portion (420) is seated around the corresponding fitting hole (301), the protrusion portion (420) coming into close contact with the inclined groove (221) by resilience of the compression spring (50) when the pipe (10) is fitted in the annular pressing member (100), thereby causing teeth of the tooth portion (410) to circumferentially come into close contact with an outer circumferential surface of the pipe (10); and a rubber packing (500) having a tapered structure, to be in close contact with the inclined surface of the insertion hole (101) of the annular pressing member (100).

2. A one-touch pipe connection device comprising:
a cylindrical member (800) having a size to allow a pipe (10) to be inserted thereinto while having threads formed at an inner circumferential surface of the cylindrical member (800);
a guide member (200) comprising a seating portion (210) threadedly coupled, at an outer circumferential surface thereof, with the inner circumferential surface of the cylindrical member (800), an inclined portion (220) extending from the seating portion (210) in a direction opposite to the cylindrical member (800) while having an inclined groove (221) formed at an inner surface of the inclined portion (220), the inclined portion (220) being in contact, at one end thereof, with an end of the cylindrical member (800), and a straight portion (230) extending axially from the inclined portion (220) while having a greater diameter than the seating portion (210), the straight portion (230) having a fitting groove (231) formed at a free end of the straight portion (230), to fit a separation preventing ring (40) therein;
a support member (300) having an opened shape to allow the pipe (10) to extend therethrough while being axially inserted into the guide member (200), the support member (300) comprising a plurality of fitting holes (301) formed at a portion of the support member (300) disposed to face the inclined portion (220), a first protrusion rib (310) defining a sealed space for disposition of a compression spring (50) with the straight portion (230) and the other end of the inclined portion (220), the first protrusion rib (310) being in contact with the separation preventing ring (40) fitted in the fitting groove (231) such that the first protrusion rib (310) is prevented from being outwardly exposed, and a second protrusion rib (320) formed to face the first protrusion rib (310) such that a space for installation of the separation preventing ring (40) is defined between the first protrusion rib (310) and the second protrusion rib (320), to prevent the separation preventing ring (40) from being outwardly separated; and contact members (400) each comprising a tooth portion (410) to be fitted in a corresponding one of the fitting holes (301) of the support member (300), and a protrusion portion (420) extending from the tooth portion (410) such that the protrusion portion (420) is seated around the corresponding fitting hole (301), the protrusion portion (420) coming into close contact with the inclined groove (221) by resilience of the compression spring (50) when the pipe (10) is fitted in the cylindrical member (800), thereby causing teeth of the tooth portion (410) to come into close contact with an outer circumferential surface of the pipe (10).

3. The one-touch pipe connection device according to claim 1 or 2, further comprising:
a watertight member (600) comprising a body (610) disposed on a step surface (211) formed at an inner circumferential surface of the seating portion (210), an elastic portion (620) extending inwardly from the body (610), and an extension portion (630) extending outwardly from an end of the body (610) in a radial direction such that the extension portion (630) is interposed between the seating portion (210) and the step (120), wherein the elastic portion (620) comes into close contact with the outer circumferential surface of the pipe (10) while moving in accordance with the movement of the pipe (10).

4. The one-touch pipe connection device according to claim 1 or 2, wherein the separation preventing ring (40) comprises a ring portion (41) cut to form opposite ends, and engagement portions (42) respectively formed at the opposite ends of the ring portion (41), the engagement portions (42) being protruded through an opened portion (201) formed at an end of the guide member (200) to communicate with the fitting groove (231).

5. The one-touch pipe connection device according to claim 4, wherein a cutting line is formed between the ring portion (41) and each of the engagement portions (42), to allow the engagement portion (42) to be easily removed after installation of the separation preventing ring (40) in the fitting groove (231).

6. The one-touch pipe connection device according to claim 1 or 2, further comprising:
a locking member (700) extending axially through the tooth portion (410) of each of the contact members (400) while comprising a locking spring (710), and locking pins (720) respectively fixed to opposite ends of the locking spring (710), the locking pins (720) being inserted into pin holes (301a) respectively formed at opposite portions of an inner surface of a corresponding one of the fitting holes (301).

7. The one-touch pipe connection device according to claim 2, wherein the cylindrical member (800) comprises an insertion limitation rib (810) centrally formed at the inner circumferential surface of the cylindrical member (800), to limit lengths of a pair of pipes (10) inserted into opposite sides of the cylindrical member (800).

8. A one-touch pipe connection device comprising:
a fastening member (100C) having a size to allow a pipe (10C) to be inserted thereinto while comprising threads formed at an inner circumferential surface of the fastening member (100C), and first hooks (110C) provided at an outer circumferential surface of the fastening member (100C), a guide member (200C) comprising a seating portion (210C) threadedly coupled, at an outer circumferential surface thereof, with the inner circumferential surface of the fastening member (100C), an inclined portion (220C) extending from the seating portion (210C) in a direction opposite to the fastening member (100C) while having an inclined groove (221C) formed at an inner surface of the inclined portion (220C), the inclined portion (220C) being in contact, at one end thereof, with an end of the fastening member (100C), a straight portion (230C) extending axially from the inclined portion (220C) while having a greater diameter than the seating portion (210C), the straight portion (230C) having a fitting groove (231C) formed at a free end of the straight portion (230C), to fit a separation preventing ring (20C) therein;
a support member (300C) having an opened shape to allow the pipe (10) to extend therethrough while being axially inserted into the guide member (200C), the support member (300C) comprising a plurality of fitting holes (301C) formed at a portion of the support member (300C) disposed to face the inclined portion (220C), a first protrusion rib (310C) defining a sealed space for disposition of a compression spring (30C) with the straight portion (230C) and the other end of the inclined portion (220C), the first protrusion rib (310C) being in contact with the separation preventing ring (20C) fitted in the fitting groove (231C) such that the first protrusion rib (310C) is prevented from being outwardly exposed, and a second protrusion rib (320C) formed to face the first protrusion rib (310C) such that a space for installation of the separation preventing ring (20C) is defined between the first protrusion rib (310C) and the second protrusion rib (320C), to prevent the separation preventing ring (20C) from being outwardly separated;
contact members (400C) each comprising a tooth portion (410C) to be fitted in a corresponding one of the fitting holes (301C) of the support member (300C), and a protrusion portion (420C) extending from the tooth portion (410C) such that the protrusion portion (420C) is seated around the corresponding fitting hole (301C). the protrusion portion (420C) coming into close contact with the inclined groove (221C) by resilience of the compression spring (30C) when the pipe (10C) is fitted through the fastening member (100C), thereby causing teeth of the tooth portion (410C) to come into close contact with an outer circumferential surface of the pipe (10C);
a connecting member (500C) to receive an end of the pipe (10C) fitted through the support member (300C), the connecting member (500C) comprising grooves (501C) formed at an inner circumferential surface of the connecting member (500C) at opposite sides of the connecting member (500C), respectively, to allow an annular rubber packing (40C) to be interposed between the pipe (10C) and each side of the connecting member (500C), and second hooks (510C) formed on an outer circumferential surface of the connecting member (500C) at opposite sides of the connecting member (500C); and connecting bars (600C) each comprising first and second coupling rings (610C, 620C) to be coupled to aligned ones of the first and second hooks (110C, 510C), respectively, and a body (630C) connecting the first and second coupling rings (610C, 620C).

9. A one-touch pipe connection device comprising:
a fastening member (100-1C) having a size to allow a pipe (10C) to be inserted thereinto while comprising threads formed at an inner circumferential surface of the fastening member (100-1C) and first coupling ribs (110-1C) provided at an outer circumferential surface of the fastening member (100-1C), each of the first coupling ribs (110-1C) having a threaded hole (111-1C) extending axially;
a guide member (200C) comprising a seating portion (210C) threadedly coupled, at an outer circumferential surface thereof, with the inner circumferential surface of the fastening member (100C), an inclined portion (220C) extending from the seating portion (210C) in a direction opposite to the fastening member (100C) while having an inclined groove (221C) formed at an inner surface of the inclined portion (220C), the inclined portion (220C) being in contact, at one end thereof, with an end of the fastening member (100C), a straight portion (230C) extending axially from the inclined portion (220C) while having a greater diameter than the seating portion (210C), the straight portion (230C) having a fitting groove (231C) formed at a free end of the straight portion (230C), to fit a separation preventing ring (20C) therein;
a support member (300C) having an opened shape to allow the pipe (10) to extend therethrough while being axially inserted into the guide member (200C), the support member (300C) comprising a plurality of fitting holes (301C) formed at a portion of the support member (300C) disposed to face the inclined portion (220C), a first protrusion rib (310C) defining a sealed space for disposition of a compression spring (30C) with the straight portion (230C) and the other end of the inclined portion (220C), the first protrusion rib (310C) being in contact with the separation preventing ring (20C) fitted in the fitting groove (231C) such that the first protrusion rib (310C) is prevented from being outwardly exposed, and a second protrusion rib (320C) formed to face the first protrusion rib (310C) such that a space for installation of the separation preventing ring (20C) is defined between the first protrusion rib (310C) and the second protrusion rib (320C), to prevent the separation preventing ring (20C) from being outwardly separated;
contact members (400C) each comprising a tooth portion (410C) to be fitted in a corresponding one of the fitting holes (301C) of the support member (300C), and a protrusion portion (420C) extending from the tooth portion (410C) such that the protrusion portion (420C) is seated around the corresponding fitting hole (301C). the protrusion portion (420C) coming into close contact with the inclined groove (221C) by resilience of the compression spring (30C) when the pipe (10C) is fitted through the fastening member (100C), thereby causing teeth of the tooth portion (410C) to come into close contact with an outer circumferential surface of the pipe (10C);
a connecting member (500-1C) to receive an end of the pipe (10C) fitted through the support member (300C), the connecting member (500-1C) comprising grooves (501C) formed at an inner circumferential surface of the connecting member (500C) at opposite sides of the connecting member (500-1C), respectively, to allow an annular rubber packing (40C) to be interposed between the pipe (10C) and each side of the connecting member (500-1C), and second coupling ribs (510-1C) formed on an outer circumferential surface of the connecting member (500-1C) at opposite sides of the connecting member (500-1C), the second coupling ribs (510-1C) being formed with slots (511-1C) extending in a direction perpendicular to an axial direction of the connecting member (500-1C) while having a length longer than a diameter of the threaded holes (111-1C), respectively; and connecting bolts (600-1C) each comprising a body (610-1C) coupled, at one end thereof, to the threaded hole (111-1C) of a corresponding one of the first coupling ribs (110-1C) after extending through the slot (511-1C) of the second coupling rib (510-1C) aligned with the corresponding first coupling rib (110-1C), and a head (620-1C) provided at the other end of the body (610-1C) while having a diameter greater than a width of the slot (511-1C).

10. A one-touch pipe connection device comprising:
a fastening member (100-2C) having a size to allow a pipe (10C) to be inserted thereinto while comprising threads formed at an inner circumferential surface of the fastening member (100-2C) and first coupling ribs (110-2C) provided at an outer circumferential surface of the fastening member (100-2C), each of the first coupling ribs (110-2C) having a slot (111-2C) extending in a direction perpendicular to an axial direction of the fastening member (100-2C);
a guide member (200C) comprising a seating portion (210C) threadedly coupled, at an outer circumferential surface thereof, with the inner circumferential surface of the fastening member (100C), an inclined portion (220C) extending from the seating portion (210C) in a direction opposite to the fastening member (100C) while having an inclined groove (221C) formed at an inner surface of the inclined portion (220C), the inclined portion (220C) being in contact, at one end thereof, with an end of the fastening member (100C), a straight portion (230C) extending axially from the inclined portion (220C) while having a greater diameter than the seating portion (210C), the straight portion (230C) having a fitting groove (231C) formed at a free end of the straight portion (230C), to fit a separation preventing ring (20C) therein;
a support member (300C) having an opened shape to allow the pipe (10) to extend therethrough while being axially inserted into the guide member (200C), the support member (300C) comprising a plurality of fitting holes (301C) formed at a portion of the support member (300C) disposed to face the inclined portion (220C), a first protrusion rib (310C) defining a sealed space for disposition of a compression spring (30C) with the straight portion (230C) and the other end of the inclined portion (220C), the first protrusion rib (310C) being in contact with the separation preventing ring (20C) fitted in the fitting groove (231C) such that the first protrusion rib (310C) is prevented from being outwardly exposed, and a second protrusion rib (320C) formed to face the first protrusion rib (310C) such that a space for installation of the separation preventing ring (20C) is defined between the first protrusion rib (310C) and the second protrusion rib (320C), to prevent the separation preventing ring (20C) from being outwardly separated;
contact members (400C) each comprising a tooth portion (410C) to be fitted in a corresponding one of the fitting holes (301C) of the support member (300C), and a protrusion portion (420C) extending from the tooth portion (410C) such that the protrusion portion (420C) is seated around the corresponding fitting hole (301C). the protrusion portion (420C) coming into close contact with the inclined groove (221C) by resilience of the compression spring (30C) when the pipe (10C) is fitted through the fastening member (100C), thereby causing teeth of the tooth portion (410C) to come into close contact with an outer circumferential surface of the pipe (10C);
a connecting member (500-2C) to receive an end of the pipe (10C) fitted through the support member (300C), the connecting member (500-2C) comprising grooves (501C) formed at an inner circumferential surface of the connecting member (500C) at opposite sides of the connecting member (500-2C), respectively, to allow an annular rubber packing (40C) to be interposed between the pipe (10C) and each side of the connecting member (500-2C), and second coupling ribs (510-2C) formed on an outer circumferential surface of the connecting member (500-2C) at opposite sides of the connecting member (500-2C), the second coupling ribs (510-2C) being formed with slots (511-2C) extending in a direction perpendicular to an axial direction of the connecting member (500-2C), respectively; and coupling members (600-2C) each comprising a rod (610-2C) extending through the slots (111-2C, 511-2C) of aligned ones of the first and second coupling ribs (110-2C, 510-2C) while having a smaller diameter than widths of the slots (110-2C, 510-2C), a head (620-2C) provided at one end of the rod (610-2C) while having a diameter greater than the width of the slot (511-2C), and a coupling nut (630-2C) threadedly coupled to the other end of the rod (610-2C) while having a size greater than the width of the slot (111-2C).

11. The one-touch pipe connection device according to any one of claims 8 to 10, wherein an insertion limitation rib (520C) is provided at an inner circumferential surface of the connecting member (500C, 500-1C, 500-2C), to limit an insertion length of the pipe (10).

12. The one-touch pipe connection device according to any one of claims 8 to 10, wherein a protrusion (502C) is formed at one side of each of the grooves (501C), and a groove is formed at the rubber packing (40C), to receive the protrusion (502C).

13. The one-touch pipe connection device according to claim 8, wherein the first and second hooks (110C, 510C) are shaped to be elastically separably coupled to the first and second coupling rings (610C, 620C).
respectively.

14. The one-touch pipe connection device according to claim 8, further comprising:

a pair of fixing members (700C) arranged opposite to the fastening member (100C) with reference to the connecting member (500C) while enclosing the outer circumferential surface of the pipe inserted into the connecting member (500C) toward the fastening member (100C) such that each of the fixing members (700C) covers 1/2 of the outer circumferential surface of the pipe, each fixing member (700C) being provided, at opposite ends thereof, with third hooks (710C) to be coupled with the second coupling rings (620C) of the connecting bars (600C), respectively.

15. The one-touch pipe connection device according to any one of claims 8 to 10, further comprising:
a protection cap (800C) fitted around the pipe (10C), to seal a gap between the guide member (200C) and the support member (300C).