KR101568178B1 - Compression Tool For Pipe Connecting - Google Patents

Abstract

A pressing tool for pipe connection according to a feature of the present invention comprises a pair of pivot levers rotatably mounted on an upper arm and a lower operating lever with respect to a hinge axis, And a pair of pivot levers which are installed on the inner surface of the operation arm of the pair of pivot levers facing each other, and a jaw mounting part which is axially coupled with the hinge shaft, And the pressing jaws of the coarse mounting portion include a fixing jaw for fixing between a movable jaw moving on the inner surface of each of the pair of actuating arms and a pair of actuating arms do. Wherein the pressurizing tanks are connected to each other by an elastic body having one end fixed to the inside thereof.

Description

[0001] COMPRESSION TOOL FOR PIPE CONNECTION [0002]

The present invention relates to a compression tool for pipe connection, and more particularly, to a pipe connection tool for pipe connection, in which another pipe is inserted into one pipe connection port and overlapped by a predetermined length, and then the entire circumference of the pipe connection is uniformly pressed, Tool.

In the method of connecting metal pipes in the longitudinal direction, there are a method in which a thread is formed in a connection portion of a pipe and a connection is made by a screw connection, a method in which a pipe and a pipe are welded, a pipe and a pipe connection are overlapped, And a press jointing method in which the outer surface of the pipe connecting port is strongly pressed and connected by a connecting crimping tool.

Among them, a compression joint method has been widely used as a method of connecting pipes made of metal used for water pipes and indoor pipes of buildings.

There are various types of crimping tools for pipe connection, but crimping tools for small diameter pipes are mainly used.

The clamping tool operates by pivoting a pair of pivoting levers around a hinge pin provided at the central portion and clamping the pipe connector by clamping force.

However, such a conventional clamping-type crimping tool is disadvantageous in that the diameter of the pipe which can be connected is limited to a small diameter because a jaw for pressing and pressing the pipe connecting port is fixedly installed.

In the conventional pressing work using the clamping type pressing tool, a pressing force is applied to the pipe connecting port in a state in which the gap between the both ends of the pivot lever constituting the clamp is wide. Therefore, in the process of compressing the pipe and pipe connector, the deformation of the pipe connector due to the compression is largely pushed outward through the gap between the opened ends of the pivot lever.

The deformation of the pipe connector, which is greatly pushed away at the gap between both ends of the pivot lever, is eventually chewed by the forceps to form a large fins on the outer circumference of the pipe connector. Thus, the pipe joints thus squeezed out are not rounded, and the squeezing rate is not uniform over the entire squeeze surface, which is the biggest cause of the leakage. In addition, there is a problem that the pressed surface becomes uneven due to the fin, and in particular, a residual stress is generated in a fin-generated portion, which causes a problem of being vulnerable to corrosion.

In addition, when the pivot lever presses the pipe while rotating around the hinge pin, a reaction occurs in the pivot lever due to the reaction of the pressing force applied to the pipe, and this stress is generated in the vicinity of the hinge pin, There is a problem in that the device is easily broken due to the phenomenon of concentration in a part of the lever.

Figures 5A and 5B of U.S. Patent No. 7,237,427 (patent date: 2007.07.03)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a compression tool for pipe connection capable of dispersing a concentrated stress generated in a fixed jaw or a pivot lever during pipe- .

It is also an object of the present invention to provide a compression tool for pipe connection which is easy to disassemble and assemble pressure jaws and is adapted to be able to replace a pressure vessel according to various pipe diameters and shapes.

When the pair of operating arms is opened, the movable jaws are pulled toward the fixing jaws to facilitate the insertion and discharge of the pipe connecting port, and when the pair of working arms are collected, Another object of the present invention is to provide a crimping tool for pipe connection having a structure that can be pushed at intervals and efficiently perform pipe squeezing.

It is a further object of the present invention to provide a structure that minimizes the formation of fins in the squeezed pipe joints when a pair of actuating arms are squeezed on the pipe connector, and helps to form a full circle.

In order to accomplish the above object, a compression tool for pipe connection according to the present invention comprises a pair of pivot levers pivotally mounted on an upper arm and a lower lever for rotation about a hinge axis, a jaw mounting part including a pressing jaw installed on an inner surface of an operating arm of the pair of pivot levers facing each other; And a coupling for connecting the lever. The pressurizing jaws of the coarse mounting part include a fixed jaw fixedly installed between a movable jaw moving on the inner surface of each of the pair of actuating arms and a pair of actuating arms.

At this time, it is preferable that the contact surfaces on the pair of pivot levers which are in contact with the fixing tank provided between the pair of operating arms are protruded in an arc shape and are in surface contact with the fixing bar.

It is further preferable that an inclined surface is formed at the lower side of the ends of the pair of working arms to form a clearance space between the upper side movable tank and the working arm front end.

In the meantime, the pressurizing tanks of the present invention are arranged such that the elastomeric inserting holes are pierced on the opposite corners, and the pressurizing tanks are connected to each other except for the pipe connector inserting interval by the elastic body whose one end is fixed in the elastic body inserting hole Can be configured.

At this time, the pressurizing tanks of the coarse mounting portion are formed such that a pin insertion hole passing through the right and left side surfaces is communicated with the elastic body insertion hole, and one end of the elastic body inserted into the elastic body insertion hole is inserted into the pin insertion hole As shown in Fig.

In addition, a pair of guide plates are fixed to the side surface of the operation arm of the present invention so that protruding portions are formed by a length not exceeding the side width of the movable tank toward the jaw attaching portion. On the protrusions of the guide plate, And a slot in which the projecting end of the pin passing through the pin insertion hole is received can be formed.

According to the present invention, since the contact surface on the pair of pivot levers which come into contact with the fixing tank is a circumferential surface having a predetermined distance R from the center of the hinge axis as a radius, It is possible to disperse the losing reaction force on the arc-shaped contact surface on the pivot lever, thereby preventing the device from being damaged due to stress concentration.

Since the pressurizing vessels are easy to disassemble and assemble, the pressurizing vessel may be provided in various sizes in accordance with the shape and diameter of the processing pipe, and the pressurizing vessels can be replaced and used as required. That is, the structure of the apparatus is the same, and the shape and diameter of the pipe accommodating space are changed by changing the inner circumferential surface shape, the size or the number of the inner circumferential surface of the movable tank, There are advantages to be able to configure.

In addition, since the pressurizing tanks are connected to each other by an elastic body, both ends of the elastic body are completely fixed to the pressure trough, so that tensile force is generated in the elastic body when the pair of operation arms are opened, The pulling action occurs.

That is, in the present invention, when the pipe connecting port is inserted or discharged for a machining operation, the tip of the movable tank is pulled as far as possible toward the tail end of the operation arm, so that the movable pipe protrudes at the pipe connecting hole inserting interval, It does not happen.

On the contrary, when the operation arm is retracted for the squeezing process after inserting the pipe into the pipe accommodating space, before the pair of operating arm edge contact each other, the tip of the movable bar is protruded by the elastic body in advance at the pipe connector insertion interval do. Therefore, according to the present invention, the outer circumferential surface of the pipe can be surrounded with the inner circumferential surface of the pressurizing tank as much as possible during the pressurizing action, so that a homogeneous joint close to the source is obtained.

Further, according to the present invention, a clearance is formed between the movable tank and the front end of the operation arm, so that the movable tank can be heard in the clearance space at the time of pressing, thereby significantly reducing the occurrence of fins in the jointed portion have.

1 is an assembled state view showing a state in which a pipe connector is inserted into and discharged from a compression tool for pipe connection according to the present invention.
FIG. 2 is an assembled state view of the pipe connecting fitting according to the present invention when it is an initial step of pressing a pipe connector. FIG.
3 is an explanatory diagram for explaining a state in which the pipe connecting connector according to the present invention presses the pipe connector.
4 is an assembled state view showing a state in which the pipe connecting fitting according to the present invention is fully pressed on the pipe connector.
5 is an exploded perspective view of a compression tool for pipe connection according to the present invention.
Fig. 6 is a perspective view showing an example of a connected configuration of pressurizing taps in a press-fitting tool for pipe connection according to the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor shall appropriately define the concept of the term in order to describe its invention in the best way It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

Hereinafter, a compression tool for pipe connection according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing a compression tool for pipe connection according to the present invention in a largely opened state for inserting or discharging a pipe connector. FIG. Fig. 2 is a schematic view showing a state in which the compression tool for pipe connection is an initial stage for compressing the pipe connector, and Fig. 3 is a view showing a state of change occurring in the movable pipe and the pipe connector when the pipe- Fig. FIG. 4 is a view showing the overall configuration when the pipe-connecting crimping tool is completely compressed through the state of FIG. 2; FIG.

FIG. 5 is an exploded perspective view of a compression tool for pipe connection according to the present invention, and FIG. 6 is a perspective view illustrating an example of a connection structure of pressure pads mounted on a pipe connection tool of the present invention.

Referring to FIG. 1, the compression tool for pipe connection according to the present invention includes a pair of pivot levers 200 that can open or close both ends of a pivot lever 200 about a longitudinal inner facing portion, A pair of pivot levers 200 and a pair of pivot levers 310 which are axially coupled to the pivot lever 200 by a hinge shaft 310 and which are provided on the upper side of the pivot lever 200 to press the pipe joint portion by a pressing force, And a coupling member 300 connecting the first and second coupling members 200 to each other.

The pivoting levers 200 are a pair of a rod-like member divided into an operation arm 210 on the upper side of the hinge shaft 310 and an operation lever 220 on the lower side, As shown in Fig.

The detailed configuration of the pivot lever 200 can be confirmed in detail with reference to FIGS. 1 and 5.

As shown in FIG. 5, the pair of pivoting levers 200 are coupled to the coupling member 300 such that the longitudinal inner surfaces thereof face each other.

The pivot lever 200 is provided with a pair of pivot levers 300 on the front and rear sides of the pivot lever 300. The pivot lever 300 is pivotally mounted on both left and right ends of the pivot lever 300, 330 are provided.

The hinge shaft 310 hinges the pair of coupling members 300 and a pair of pivoting levers 200 positioned between the coupling members. With this configuration, the pair of pivoting levers 200 can rotate in opposite directions within a predetermined angular range.

More specifically, the upper operation arm 210 and the lower operation lever 220 of the pair of pivoting levers 200 are coupled to each other by the structure of the coupling hole 300 and the hinge axis 310, Both sides can work together to open or spread apart.

As shown in FIG. 1, it is preferable that the pair of actuating levers 220 have a tapered shape in which the width of the inner side surface decreases toward the lower end. This shape facilitates easy entry of the driving head 500 of a separate driving device (e.g., hydraulic cylinder) between the pair of operating levers 220.

That is, as shown in FIGS. 2 and 4, the driving roller 510 provided at the front end of the driving head 500 advancing and retreating forward of the driving apparatus is easily moved along the lower tapered inner surface of the pair of operating levers 220 As a result, the pair of operating levers 220 can be operated so as to gradually spread to both sides.

When the drive head 500 is moved between the pair of operation levers 220, the drive device is connected to the pipe connecting crimping tool of the present invention through the drive device connection hole 340 formed in the coupling hole 300 do.

On the other hand, the operation arms 210 on the upper side of the pair of pivoting levers 200 are curved inwardly in an arc shape.

As shown in FIG. 1, a coarse fitting part 100 is formed inside the operating arm 200, and a space is formed inside the coarse fitting part to accommodate the pipe. In the present invention, this space will be referred to as a " pipe accommodating space ".

3, an inclined surface 211 is formed at a predetermined length below the front end of the actuating arm 210 so that a clearance space 212 is formed between the upper movable shell 121 and the distal end of the actuating arm 210 .

The pair of actuating arms 210 having such a configuration are pivoted or opened by being pinched in cooperation with the rotation of the actuating lever 220 by the engagement hole 300 and the hinge shaft 310 .

1, the space between the left and right operation arms 210 becomes a pipe connector insertion space S in a state where the pair of operation arms 210 are opened.

2, when the driving device 500 is actuated to introduce the external force F, the lower ends of the operating levers extend to both sides and the operating arms 210 are turned in opposite directions, The pipe connector insertion gap S is closed as shown in Fig. In this process, a strong pressing force is applied to the joint between the pipe and the pipe connecting port on the inner circumferential surface of the pressurizing jaws of the coarse fitting part 100, and the press-fit joint is firmly made.

2, the inner surface of the pivot lever 200 comes into surface contact with the fixing tank 110, which will be described later, near the boundary between the actuating arm 210 and the actuating lever 220. As shown in Fig. To this end, a contact surface on a pair of pivoting levers 200 contacting with the fixing barrel 110 is formed as a circular arc with a circular arc having a predetermined radius R from the center of the hinge axis 310 desirable.

The coarse fitting portion 100 is a constituent portion composed of pressing knobs for pressing and pressing the outer circumferential face of the joint portion of the pipe when the pair of actuating arms 210 are pressed in a direction facing each other to generate a compressive force.

The detailed configuration of the coarse fitting part 100 can be confirmed in detail with reference to the exploded perspective view of FIG.

As shown in the drawing, the coarse mounting portion 100 is formed of a plurality of pressing tongues. The pressing tongue can be reciprocated along the elongated hole 410 of the guide plate 400 from the inner surface of each of the pair of operating arms 210 And a fixing tank 110 fixed between the movable tank 120 and the pair of actuating arms 210.

The pressurizing tank, that is, the movable tank 120 and the fixing tank 110 are components that directly contact the outer circumferential surface of the pipe connecting port with the inner circumferential surfaces 123 and 124 to directly press the pipe. In addition, the inner peripheral surfaces 123 and 124 of the pressurizing vessel form a pipe accommodating space corresponding to the outer peripheral surface size of the pipe connecting port.

As shown in FIG. 5, in this embodiment, the movable tank 120 installed in one operation arm 210 is divided into an upper movable tank 121 and a lower movable tank 122.

133 and 134 through the left and right side surfaces are formed in the movable tank 120 so that the pins 131a, 132a, 133a and 134a can be inserted into the pin holes 131a, 132a, 133a, do. At this time, the pins 131a, 132a, 133a and 134a can use a normal spring pin.

A method of coupling the movable tank 120 to the guide plate 400 to be described later is as follows.

The pins 131a, 132a, 133a, and 134a are inserted into the pin insertion holes 131, 132, 133, and 134 formed in the respective movable tanks 120, respectively. At this time, the length of the inserted pin is longer than the thickness of the left and right side surfaces of the movable tank 120 so that both ends of the coupled pin protrude from the left and right sides of the movable tank 120 to a predetermined length.

When the protruding end is positioned inside the elongated hole 410 of the guide plate 400 when the guide plate 400 is engaged, the protruding end is caught by the elongated hole and the movable plate 120 is not separated from the guide plate. 120 are coupled to the actuating arm 210 via the guide plate 400. When the coupling is completed, the movable tank 120 can be reciprocated while being guided by the elongated hole 410.

The connection structure of the upper movable tank 121 and the lower movable tank 122 will be described with reference to FIG.

The elastic member inserting holes 160 are respectively drilled on the opposite sides of the upper movable barrel 121 and the lower movable barrel 122, respectively. The perforated elastic body insertion holes 160 are opposed to each other and both ends of one elastic body 140 are inserted and fixed in the hole. Thus, the upper movable shell 121 and the lower movable shell 122 are connected by a single elastic body 140.

As a method of fixing one end of the elastic body 140 in the elastic body insertion hole 160, a method of welding or the like may be adopted. In this embodiment, however, a fixing method using a pin is used as shown in FIGS. 5 and 6.

The fixing method using the pin is as follows.

The pin insertion holes 132, 133 and 134 passing through the right and left side surfaces of the pressurizing chambers are formed so as to communicate with the elastic body insertion hole 160 and then one end of the elastic body 140 having the rings 141 at both ends thereof And inserted into the elastic body insertion hole 160. In this state, the pins 132a, 133a, 134a are inserted into the pin insertion holes, and the elastic body 140 is fixed in the elastic body insertion hole 160 by passing through the ring 141 and penetrating the pressure vessel. An elastic body with a ring at both ends is representative of a tension spring.

In the present embodiment, the movable tank 120 coupled to one operation arm 210 is described as being separated into two by the upper movable tank 121 and the lower movable tank 122. However, if necessary, 120) may be installed without separating them, or they may be separated into three or more.

Since the pressurizing tanks of the present invention are easy to disassemble and assemble, the pressurizing tanks can be provided in various sizes and can be used in accordance with the shapes and diameters of the processing pipes as needed.

5 and 6, in the present embodiment, the rear surface shape of the movable tank 120 is curved so as to correspond to the inner surface shape of the actuating arm 210, and the front surface, that is, the inner peripheral surface 123, So as to accommodate the circular pipe.

However, in the present invention, the shape of the rear surface or the front surface of the movable tank 120 is not limited thereto. That is, if the inner surface of the actuating arm 210 is formed in a slant plane, the rear surface of the movable tank 120 can be formed in a sloping plane, Or hexagonal shape.

Since the fixing tank 110 is fixed between the pair of operation arms 210, the Y-shape is formed to match the shape of the operation arms 210.

The inner circumferential surface 124 of the fixing tank 110 is formed in accordance with the shape of the pipe to be processed, and is exemplified as an arc in this embodiment.

Both lower sides of the fixing tank 110, that is, lower inverted triangular shapes, are formed so as to be in surface contact with each other in the same shape corresponding to the inner surface of the pivot lever 200 to be contacted. The shape of the inner surface of the pivot lever 200 which is in surface contact with the fixing bar 110 in the present embodiment is formed in an arc shape with a predetermined distance R as a radius around the hinge axis 310. [

When the pivot lever 200 and the pivot lever 200 are in surface contact with each other in this manner, when the pivot lever 200 rotates about the hinge axis 310, . Also, the reaction force applied to the fixing tank 110 when the pipe is compressed can be dispersed on the arc-shaped contact surface of the pivot lever 200, so that damage to the device due to stress concentration can be prevented in advance.

Two pin insertion holes 111 and 112 formed at the upper left and right sides of the elastic member 140 are formed in the fixing bar 110. The pin insertion holes 111 and 112, And connects the movable tank 120 and the fixing tank 110 by using the ring 141 and the pin.

A configuration for connecting the fixed and movable tanks will be described with reference to Fig.

The elastic body insertion hole 160 is punched on the edge of the fixing barrel 110 (upper left and right sides of the Y-shape). One end of the elastic body 140 is inserted into the elastic body insertion hole 160 and then fixed in the hole. The other end of the elastic body 140 is inserted and fixed in the elastic body insertion hole 160 formed on the opposite surface of the movable tank 120. Thus, the fixing tank 110 and the movable tank 120 are connected by the elastic body 140.

The method of fixing one end of the elastic body 140 to the elastic body insertion hole 160 is the same as that of the above-described movable body 120.

The pin insertion hole 113 of the fixture 110 shown in FIG. 5 is used to fix the fixture to the fixture 300. The pin insertion hole 113 of the fixture 110, A pin insertion hole 113b is formed in the pin insertion hole 113b and the pin 113a is inserted to penetrate the pin insertion holes 113 and 113b together. And is fixed between the operation arms 210.

The configuration of the guide plate 400 will be described with reference to Figs. 4 and 5. Fig.

The guide plate 400 is formed in a plate shape and is installed in pairs on both sides of the operation arm 210 (seen from the front and rear in the figure).

A portion of the guide plate 400 abuts against the surface of the actuating arm 210 and the rest of the guide plate 400 extends beyond the inner surface of the actuating arm 210 to form a protruding portion in the direction of the pipe accommodating space.

At this time, it is preferable that the protruding portion is formed so as to have a protruding width so as not to exceed the inner circumferential surface 123 of the movable tank 120, and the shape thereof is the same as that of the inner circumferential surface 123 of the movable tank.

An elongated hole 410 is formed on the projection to receive the protruding end of the pin passing through the pin insertion hole of the movable tub 120. [

Bolt holes 401, 402, 403 and 404 are formed in the guide plate 400 in contact with the surface of the actuating arm 210 to engage with the actuating arm 210. Also, bolt holes (not shown) of the same size are formed on the surface of the operation arm 210 at positions corresponding to the bolt holes of the guide plate.

Therefore, the actuating arm 210 and the guide plate 400 can be engaged with the bolts 401a, 402a, 403a, and 404a so that the formed bolt holes are aligned with each other.

Hereinafter, the operation of the crimping tool for pipe connection according to the embodiment of the present invention will be described with reference to FIG. 1 to FIG.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a first operating state view showing an embodiment of a compression tool for pipe connection according to the present invention awaiting the insertion of a pipe connector for pipe press fitting. Fig.

Referring to FIG. 1, in the present embodiment, the lower end of the operation lever 220 is tightly closed so that the pair of operation arms 210 are opened to the left and right to form a pipe connector insertion space S, The pipe accommodating space is extended to the inside of the pipe 100. The pipe to be squeezed can be inserted into the pipe accommodating space inside the coarse fitting part 100 through the pipe insertion opening S which is opened as described above.

When the coarse fitting unit 100 is extended as described above, the spacing between the pressing coils spreads as shown in FIG. 5, so that the elastic body 140, which is fixed to the moving coils and connected to each other, is stretched to generate a tensile force . Accordingly, the connecting elastic body 140 pulls the pressurizing tanks to each other, resulting in a force for moving the movable tanks 120 toward the fixing tank 110.

1, the protruding end of the pin inserted through the pin insertion holes 132 and 134 of the movable tanks 120 is moved to the lower end of the elongated hole 410 of the guide plate, The upper end of the arm 121 is retracted to the same level as the end of the arm 210.

As described above, according to the present invention, when the operation arm 210 is opened, the movable tank 120 does not protrude toward the pipe connector insertion gap between the pair of operation arms 210, So that the jamming phenomenon by the jaw 120 does not occur.

FIG. 2 is a second operational state diagram showing a state in which the operation arm 210 is pushed down to press the pipe connector with the crimping tool for pipe connection according to the embodiment of the present invention. As shown in the figure, the pipe joints are inserted into the pipe connector C so that the pipe P is inserted to a certain length and overlapped with each other.

The operation will be described with reference to FIG.

The illustrated piping connection crimping tool pushes the driving head 500 of the driving device (for example, hydraulic cylinder) into the space between the lower ends of the pair of operating levers 220 to gradually open the lower end of the operating lever 220 to the left and right . At this time, the driving device is coupled with the driving device connection hole 340 so that the force for pushing the driving head 500 is effectively transmitted to the pipe connecting crimping tool.

As the lower end of the operating lever 220 is opened, the pair of operating arms 210 start to shrink each other. Eventually, the coarse fitting portion 100 starts to contract, so that the inner peripheral surfaces 123 and 124 of the pressure- As shown in Fig.

At this time, the outer diameters of the joints of the pipe connector C are larger than the inner diameters of the pressure vessels when they are completely contracted, so that the ends of the pair of actuating arms 210 are not in contact with each other, Then, as shown in FIG. 4, the predetermined interval T becomes zero when the operation arm 210 is broken until the inner circumferential surface of the pressurizing tanks comes into contact with the entire outer circumferential surface of the pipe.

2, the tensile force acting on the elastic body 140 connected between the pressing jaws is eliminated, and the movable jaws 120 are moved in the direction shown in Fig. A force to move toward the pipe connector insertion gap S between the pair of operation arms 120 is generated and a gap between the pressure chambers is narrowed so that the coarse fitting portion 100 is contracted.

This action will be described in more detail as follows. First, as shown in Fig. 1, in the state where the pressurizing jaws are open, tensile force acts on the elastic body 140 connecting the pressurizing jaws. Subsequently, when the operating arm 210 starts to be broken in the state shown in FIG. 2, the elastic body 140 is gradually contracted due to the tensile force being released, thereby narrowing the interval between the pressure-applying bars.

However, when the elastic body 140 is contracted to a predetermined length, since the elastic body has a fixed end formed on the fixing base side and a free end toward the pipe connector insertion interval S, when the elastic body 140 is contracted to a predetermined length, Even if it continues to come off, the elastic body does not shrink and generates a reaction force pushing the pressurizing tanks toward the pipe connector insertion gap S. 2, the tip of the upper movable vessel 121 is protruded by a predetermined length a beyond the edge of the actuating arm 210. As shown in FIG. At this time, the interval between the tips of the pair of upper movable vessels 121, on which the outer circumferential face of the pipe connector is exposed, is b.

If the tip of the upper movable vessel 121 does not protrude by a predetermined length a, the outer peripheral surface of the pipe connecting hole is exposed to a predetermined spacing T, which is much larger than the spacing b, and receives a strong pressing force.

Accordingly, in the compression process, the pipe connector is deformed to be pushed out to the space of the predetermined interval T, so that the pushed deformation event may cause a problem of forming a large fin by chewing between the tips of the upper movable shell 121 .

However, in the present invention, the occurrence of the fin can be minimized because the exposure of the outer circumferential surface of the pipe connector is generated only at a distance b which is much narrower than the predetermined interval T.

3 is a third operational state diagram showing the state of the operation arm 210 in which the pipe connector is being squeezed by the crimping tool for pipe connection according to the embodiment of the present invention. That is, in the state of FIG.

As described above with reference to FIG. 2, in the present invention, when the compression is performed, a part of the pipe connecting hole is pushed at a distance b between the leading ends of the pair of upper movable vessels 121, and a protruding deformation occurs.

However, in the present invention, the inclined surface 211 is formed on the lower side of the front end of the operating arm 210, and a clearance space 212 is formed between the upper movable shell 121 and the front end of the operating arm 210. Therefore, when the compression force against the pipe connector is applied, the tip of the upper movable tank 121 is slightly heard toward the clearance space 212 as indicated by a dotted line in FIG.

That is, the deformation of the pipe connector, which is pushed between the tips of the pair of upper movable troughs 121, occurs over a relatively wide gap B while lifting the upper movable tank 121 when the clearance space 212 exists, 212, the upper movable tank 121 is inaudible and is concentrated at a narrow gap b between the ends.

Therefore, since the protruding height e is formed to be low when the clearance 212 exists, it is possible to minimize the phenomenon that the protruding height e is chewed by the pair of upper movable troughs 121 to generate a fin.

4 is a fourth operational state view showing a state in which the pipe connecting fitting according to the embodiment of the present invention is completely pressed on the pipe connecting port. However, the pipe connector is not shown.

3, the driving head 500 of the driving device is fully pushed into the spaces between the lower ends of the pair of operating levers 220 to open the lower ends of the operating levers 220 to the left and right as much as possible. The state shown in FIG. 4 is reached.

4, the pair of actuating arms 210 are operated until the interval T shown in FIG. 2 is eliminated, that is, until the ends of the pair of actuating arms 210 contact each other, ) Is in a state of being closed. At this time, the pipe connection port (C), which is strongly pressurized by the pressurizing jaws, is compressed and joined to the pipe (P) inserted therein while reducing its diameter.

As described above, the result of the press-fit joint of the present invention is that the metal is surrounded by the inner peripheral surfaces 123 and 124 of the pressurizing vessel and is pushed between the pair of upper movable vessels, fin) phenomenon is remarkably reduced, so that homogeneous joints close to the origin are obtained.

As described above, the pressing tool for pipe connection according to the embodiment of the present invention has been described.

It is to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the appended claims rather than by the foregoing detailed description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

100: coarse attaching portion 110:
120: Movable tank 121: Upper movable tank
122: lower movable chamber 140: elastic body
160: Elastic body insertion hole
200: Pivot lever 210: Operation arm
211: inclined surface 212: free space
220: Operation lever
300: coupling part 310: hinge shaft
320: snap ring 330: hinge shaft insertion hole
400: Guide plate 410: Slot
500: driving head 510: driving roller

Claims (6)

A pair of pivoting levers 200 rotatably mounted on the upper and lower operation arms 210 and 220 facing each other with respect to the hinge axis 310 and a pair of pivoting levers 200 facing each other, And a pair of pivoting levers 200 which are axially coupled by the hinge shaft 310 and which are pivotally coupled to the pivoting lever 200. [ And a coupling member (300) for connecting the coupling tool (300)
The pressurizing vessel of the coarse loading unit 100 includes a fixed vessel 110 installed to be fixed between the movable vessel 120 moving on the inner surface of each of the pair of actuating arms 210 and the pair of actuating arms 210, / RTI >
The inclined surfaces 211 are formed on the lower side of the tip ends of the pair of actuating arms 210 so that a clearance 212 is formed between the lower end of the pair of actuating arms 210 and the movable tank 120 Wherein the pipe connection tool is a pipe connection tool.
The method according to claim 1,
Wherein the contact surfaces between the pair of pivoting levers (200) and the fixing tank (110) provided between the pair of operating arms (210) are formed in an arc shape.
delete The method according to claim 1 or 2,
The pressurizing tanks of the coarse mounting portion 100 are formed with an elastic body inserting hole 160 on the opposite surface,
Wherein the pressurizing tanks are connected to each other by an elastic body (140) having one end fixed in an elastic body insertion hole (160) except for a pipe connector insertion interval.
The method of claim 4,
The pressurizing tanks of the coarse mounting portion 100 are formed such that a pin insertion hole 131 passing through the right and left side surfaces is communicated with the elastic member insertion hole 160,
Wherein one end of the elastic body (140) inserted into the elastic body insertion hole (160) is fixed by a pin passing through the pin insertion hole.
The method of claim 5,
A pair of guide plates 400 are fixedly installed on the surface of the operation arm 210 so as to protrude a predetermined length toward the coarse mounting portion 100,
Wherein an elongated hole (410) is formed on the protrusion of the guide plate (400) to receive a protruding end of a pin passing through the pin insertion hole of the movable tank (120).

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