KR101494172B1 - Forming machine with quick changing structure of roller assembly - Google Patents

Abstract

The present invention relates to a pipe forming machine capable of quickly changing a roller assembly. More specifically, a forming roller apparatus is configured to be connected to a fixated stand by assembling each roller such as an upper roller, a lateral roller, and a lower roller which pressurizes a metal plate of a pipe material by the roller assembly of a cassette type; thus manufacturing a pipe by replacing only the roller assembly during a case of changing the size of the pipe to be molded. Especially, the pipe forming machine allows secure power transmission during a case of replacing the roller assembly, and a quick replacement by applying a pressure device to prevent the roller assembly from demounting and pressurize the same; and a power connection device, which is an intermediate connection of transferring rotational power to the roller of the roller assembly, in a sliding movement mode.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roller assembly,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gantry machine capable of quickly replacing a roller assembly, and more particularly, to a gantry machine capable of quickly replacing a roller assembly, So that when the size of the tube to be formed is changed, only the roller assembly is replaced to manufacture the tube. In particular, by applying a pressing device that presses the roller assembly while preventing detachment of the roller assembly and a power connection device that is an intermediate connection that transmits rotational power to the rollers of the roller assembly, the power transmission is interrupted and replaced quickly And the like.

In general, a tubular machine is an apparatus for manufacturing a sheet metal plate by a cold forming method in which a strip-shaped metal plate is passed between shaping rollers disposed up and down and right and left. To form a circular tube having a desired diameter.

Since the tubing for performing such a molding process can be manufactured to have a tube having various diameters of various sizes by replacing the rollers meeting the predetermined dimensions of the pipe diameter to be formed, the upper roller, the side roller, Or by adjusting the distance between the rolls.

However, in a conventional production line for forming a steel pipe, a plurality of forming roller apparatuses having different intervals between rollers are sequentially and fixedly arranged, so that when a tube of a different diameter is to be formed, The entire molding line must be stopped during operation.

In addition, since the interval adjustment or replacement operation of the rollers must be performed for each of the forming roller apparatuses, it takes a lot of time, and therefore, it is necessary to stop the operation of the line for a long time.

Therefore, the roller assembly of the cassette type assembled by assembling the forming roller device with the predetermined interval and arrangement of rollers is inserted into the stationary stand for quick installation. However, the above method improves workability in adjusting the spacing between the rollers. However, it is difficult to remove the pressing device that presses the upper portion of the roller assembly to prevent the roller from being lifted up during the molding process, The process of disassembling must still be performed in a conventional manner. Therefore, the replacement by the roller assembly alone is not effective in shortening the time.

Korean Patent No. 10-1093740 (Registered on Dec. 07, 2011), a tubular apparatus configured to be removable from a cassette-type forming roller assembly has a fixing stand and a structure in which a forming roller assembly is coupled thereto. In order to prevent the registration roller assembly from being dismounted, the registration key may be provided with a rod upper key groove < RTI ID = 0.0 > The work of fixing the key on the key and the coupling and disassembling work of the line that transmits the power to the rotation axis of the roller still can not be improved and the whole working time is not shortened.

In addition, since the rollers of the forming roller assembly are constituted only by the upper roller and the lower roller, both ends of which are respectively coupled to the fixing stand, the size of the forming roller assembly is excessively increased at the time of forming the large diameter tube, It is necessary to study a joining structure which can stably integrate the side rollers while reducing the gap between the rollers.

Therefore, the roller governor capable of quick replacement of the roller assembly of the present invention,

It is possible to form a large diameter pipe while reducing the total weight of the roller, and it is possible to automate the process of fixing and pressing the roller assembly and dismantling and removing the power transmission line, thereby dramatically shortening the roller replacement time, It is intended to provide a device.

According to an aspect of the present invention,

A forming roller device composed of a roller assembly in which a plurality of forming rollers are formed integrally with a standard and a fixing stand for fixing the roller assembly, and a locking function for fixing and releasably opening the roller assembly of the forming roller device to the fixing stand And a power transmitting device for transmitting the power to the forming roller device to rotate the forming roller.

The fixing stand of the forming roller apparatus comprises: a base installed along a steel pipe forming line and installed on a line surface; A vertical bar is provided on each of both sides of the forming line in the upper part of the base, and the pair of vertical bars are constituted by first and second vertical guide members having guide grooves formed on the opposite surfaces,

Wherein the roller assembly of the forming roller device comprises: a plurality of shaping rollers vertically arranged vertically so as to press the side surface of the steel pipe; A rotating shaft axially installed in the forming roller; Wherein the first and second vertical guide members are slidably coupled to the first and second vertical guide members so as to be perpendicular to the first and second vertical guide members, A plurality of latching blocks each of which has a connecting portion having a vertical through hole protruding outwardly from both sides of the forming line; An interval adjusting bar installed between the upper and lower engaging blocks to separate the engaging blocks from each other; A connecting bar which is inserted into a vertical hole of a plurality of latching blocks disposed in the upper and lower positions sequentially and which is coupled by a nut and a latch block whose lower end is disposed at the lowermost part; And a lug which is fixedly coupled to the connection bar by a nut and has a ring at an upper portion thereof in the form of a bar for horizontally connecting upper ends of the two connection bars coupled to both sides of the rotation axis.

The roller governor capable of quick replacement of the roller assembly of the present invention by the above-

A plurality of rollers may be integrally formed by a single assembly so as to be able to form a tube of the standard so that the roller can be quickly replaced when the standard of the tube is changed.

It is possible to prevent the rollers from being pushed during the forming process by pressing the upper part of the integrated roller assembly through the pressing part of the fixed pressing device and to automatically move backward when the roller assembly is replaced, The power transmission device that transmits power to the rotating shaft is also automatically disconnected from the rotating shaft. By automating the process of separating and connecting each device, it is possible to greatly reduce the roller replacement time, A useful device can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A and FIG. 1B illustrate a front view and a plan view of a tubular unit according to an embodiment of the present invention;
FIGS. 2A and 2B are a front view and a side view showing a forming roller apparatus according to an embodiment of the present invention;
FIGS. 3A and 3B are a front view and a side view showing a main portion of a pressurized moving table according to an embodiment of the present invention;
FIG. 4A is a view showing a state in which a removable shaft is separated by movement of a horizontal moving truck according to the present invention; FIG.
Figure 4b is a partial cutaway view of a telescoping connection shaft according to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

FIGS. 1A and 1B are front and plan views of a tubular machine according to an embodiment of the present invention. FIGS. 2A and 2B are a front view and a side view of a forming roller apparatus according to an embodiment of the present invention. FIGS. 3A and 3B are a front view and a side view showing a substantial part of a pressurized moving table according to a preferred embodiment of the present invention, FIG. 4A is a view showing a state in which a removable shaft is separated by the movement of a horizontal moving truck, And Fig. 4B is a partial cutaway view showing a connection axis.

As shown in the drawing, the gypsum vessel 10 capable of quickly replacing the roller assembly 24 according to the present invention includes a shaping roller device 20 in which a shaping roller 25 for pressing a steel sheet sequentially to form a tube is assembled, A stationary pressurizing device 30 for pressing and fixing the shaping roller device, and a power transmission device 40 for transmitting and rotating the shaping roller.

The forming roller device 20 comprises a stationary stand 21 fixed to an installation line and a roller assembly 24 detachably coupled to the stationary stand.

The fixing stand 21 is for fixing the roller assembly, and has a base 211 installed on the surface of the steel pipe forming line. The base 211 may be a plate having a large surface, or may be a horizontally vertically connected frame, so that the upper surface is kept horizontal.

A first vertical guide member (22) and a second vertical guide member (23) are provided on the upper surface of the base on both sides of a line through which the steel pipe on both sides of the forming line is moved. The first and second vertical guide members are formed by a pair of vertical bars 212, and the pair of vertical bars 212 are formed with guide grooves 213 on the inner surfaces thereof facing each other. Further, the two vertical bars 212 may be directly coupled to the base to maintain a gap, or the lower ends thereof may be connected by horizontal bars to form a vertical guide member having a " C " Further, a gap holding frame 214 may be further provided between the first vertical guide member 22 and the second vertical guide member 23 so that a predetermined gap is maintained between the two members.

The roller assembly 24 is installed at both ends of the first vertical guide member 22 and the second vertical guide member 23 installed on both sides of the steel pipe forming line so as to be orthogonal to the forming line.

The roller assembly 24 has a plurality of forming rollers 25 for pressing the side surface of the steel pipe. The upper roller 251 and the lower roller 252 to press the upper and lower portions of the steel pipe to be formed or the upper roller 251 and the side rollers 253 and the lower roller 252, And press the upper and lower and middle and lower sides, respectively. Each of the forming rollers in the multiple roller assembly, which is sequentially disposed along the steel pipe forming line, forms a curved surface that is the same as the diameter of the steel pipe to be formed, So as to be formed into a tube having a standard diameter.

A rotation shaft 26 is formed in the shaping roller 25. The rotating shaft 26 is installed in a direction orthogonal to the forming line. In the configuration of the upper roller 251 and the lower roller 252, the rotation axis is formed in a direction orthogonal to the forming line. In the configuration of the side roller 253, the rotation axis is perpendicular to the forming line So that the roller is rotated. In the present invention, the direction of the rotation axis indicates the direction orthogonal to the forming line which is the rotation axis of the upper roller and the lower roller.

At both ends of the rotary shaft 26, a locking block 27 is engaged. The locking block 27 is mounted on the first vertical guide member 22 and the second vertical guide member 23 so that the forming roller 25 is disposed between the first vertical guide member and the second vertical guide member will be. That is, the two vertical guide members 22 and the two vertical guide members 23 are rotatably coupled to each other by a rotation shaft 26, 25 are coupled and rotated together with the rotating shaft. The latching block 27 is inserted between two vertical bars constituting the first vertical guide member and the second vertical guide member, and protrusions 271 are formed on both sides of the vertical bars, do. Therefore, the latching block 27 is inserted into the guide groove 213 at the upper end of the vertical bar and then inserted into the lower portion to be fixed in the forward, backward, leftward and rightward directions. Here, the protrusion 271 of the locking block and the guide groove 213 of the vertical bar minimize the clearance when engaging, thereby preventing the forming roller from being pushed by the pressure during the tube forming process, and further, And various means such as bolt tightening or pneumatic pressure application can be applied.

Further, the side roller 253 is vertically formed with a rotation shaft 26a and is supported by a single locking block 27. [ That is, the upper roller 251 and the lower roller 252 are supported by the engagement blocks having opposite ends of the rotation axis, but the side rollers are supported by one engagement block. The retaining block 27 for supporting the side rollers has a space portion in which the upper and lower ends extend in the direction of the side rollers and in which the side rollers are inserted, a vertical rotation shaft 26a is provided on the extended inner surface, A side roller is formed. The side roller support retaining block also has protrusions 271 formed on both sides thereof and engaged with the guide grooves of the vertical bars.

As described above, the roller assembly 24 includes an upper roller 251 or a lower roller 252, a rotary shaft 26 axially installed in the upper roller or the lower roller, and a locking block 27 coupled to both ends of the rotary shaft A pair of rollers, a pair of side rollers 253, a pair of vertical rollers 26a and a pair of rollers 27a for supporting the vertical rotary shaft, and a pair of rollers.

Therefore, it is possible to provide the set roller assembly 24 including the upper roller and the lower roller or the side roller for manufacturing the standard pipe by joining the upper and lower roller bundles together by the connecting bar 29. [ For example, when only the upper roller 251 and the lower roller 252 are required, the lower roller bundle including the upper roller bundle and the lower roller including the upper roller is integrally coupled by the connecting bar 29, The upper roller 251 and the side roller 253 and the lower roller 252 are required, the upper roller bundle, the side roller bundle and the lower roller bundle may be connected to the connecting bar 29 So that the roller assembly 24 corresponding to the diameter required for forming the steel pipe can be selected and fastened to the stationary stand 21 to quickly replace the roller.

The plurality of locking blocks 27 are coupled by the vertical bar chain connecting bar 29 such that a connecting portion 272 having a vertical through hole 273 is protruded from one side of the locking block, A plurality of locking blocks can be integrated by inserting the connecting portion 272 and bolting the lower end and the upper end of the connecting bar. At this time, the connection portion 272 is formed on an axial surface exposed to the outside when the fixing stand 21 is mounted. Since the rotation shaft 26 is disposed at the center, a plurality of connection portions 272 are formed on both sides of the rotation shaft. The connecting portion 272 through which the connecting bar 29 is inserted may have a vertical hole 273 formed in the latch block 27 or a vertical hole formed in the member mounted on the latch block, Various methods capable of forming a vertical hole in the constellation can be applied.

The plurality of connection bars 29 horizontally connect the upper end by a lug 291. The lug 291 is coupled to the connecting bar 29 in a bar shape by a nut and a ring 292 is formed at the center of the upper surface to connect the lifting unit to the ring when the roller assembly is detached from the fixing stand, do.

In addition, the upper and lower retaining blocks 27 are further provided with spacing bands 28 for adjusting the spacing. The spacing adjuster 28 adjusts the interval between the upper and lower rotation shafts so that the interval between the upper and lower sifting rollers 25 has a standard size while providing an effect of reducing the spacing adjuster 28 of the engagement block.

The lower holding block, to which the lower end of the gap adjusting bar is seated, is formed with a seating groove into which a lower end portion of a lower end of the gap adjusting bar is inserted so as to be connected to a predetermined position can do. Such a gap adjusting block can be easily adjusted by adjusting the distance between the holding blocks by variously changing the length of the gap adjusting block coupled to the holding block.

On the other hand, the stationary pressurizing device 30 includes a horizontal guide member 31, a vertical support member 32, and a pressing base 33 horizontally moved on the horizontal guide member.

The horizontal guide member 31 is a pair of frames horizontally installed in both the upper and lower ends of the first and second vertical guide members 22 and 23 in the direction of the axis of rotation (the direction of the axis of rotation of the upper roller). That is, one end of the horizontal guide member 31 is engaged with the upper end of the first vertical guide member 22, the other end is coupled to the upper end of the vertical support member 32, And the upper ends are joined and horizontally installed at a predetermined height from the surface of the tube forming line. The horizontal guide members 31 are formed as a pair so that a spacing frame is further provided to maintain a constant distance between the two horizontal guide members so that the gap between the two horizontal guide members is kept constant while increasing the structural strength do.

In addition, the horizontal guide member 31 is formed with a step on the inner side as shown in FIG. 3B, and a rail 311 is mounted on the upper part of the step. The lane 311 may be formed of a ball rail or a gear. In addition, the horizontal guide member 31 is formed with the same grooves as the guide grooves of the first and second vertical guide members in the portion coupled to the first and second vertical guide members 22 and 23, .

The pressing base 33 is placed on the upper portion of the horizontal guide member and is slid in the horizontal direction by the moving motor 331. Such a pressurized moving stage is located above the first vertical guide member and the second vertical guide member during the tube forming process to press the roller assembly 24 to prevent the roller from being pushed upward during the tube forming process, Is moved to one side along the rail 311 of the horizontal guide member by the motor operation so that the roller assembly can be easily removed and replaced from the stationary stand including the first vertical guide member and the second vertical guide member.

The presser foot 33 is supported by two horizontal guide members on both sides of the horizontal main body 332. Drive wheels 333 and driven wheels 333 are installed on both sides of the main body 333, The power is transmitted from the driving motor provided on the horizontal body and moved horizontally on the horizontal guide member.

A pressurizing cylinder 34 is provided in front of and behind the moving direction (rotational axis direction) of the pressing base 33 so that the pressing rod 341 can be drawn out. The two pressurizing cylinders are formed at the same interval as the interval between the first vertical guide member and the second vertical guide member, and the roller assembly 24 mounted on the first vertical guide member and the second vertical guide member when the pressurizing rod 341 is drawn out, So as to prevent the jam block from being pushed during the tube forming process.

A limit sensor 35 is attached to the horizontal guide member 31 in front of and behind the moving direction so as to limit the movement of the pressing base 33 and stop the fixing base 33 in a fixed position, .

In addition, a locking cylinder 36 is further provided on both sides of the pressing base 33 so as to be close to the horizontal guide member 31, so that the rod pull-out path of the locking cylinder can be tightly fixed to the horizontal guide member . In this way, the pressing rod of the pressurizing cylinder is pulled out while the pressing rod is fixed by the locking cylinder, so that the pressing of the holding block is performed.

The power transmission device 40 is provided with a motor 41 as a power generating device that transmits power to a forming roller to provide a rotational force, and the motor is connected to a speed reducer 42 to output power with increased torque And the power output from the speed reducer transmits power to the rotary shaft 26 of the roller assembly through the output shaft 43, the connecting shaft 44 and the take-off shaft 45.

The output shaft 43 is horizontally installed in the speed reducer 42 and the removable shaft 45 is horizontally extended with the rotary shaft 26. The connection shaft 44 is connected at one end to the output shaft 43 And the other end is connected to the detachment shaft 45 and the connection is made of a universal joint so that power transmission can be performed even if the height of the output shaft is different from that of the detachment shaft.

Here, the detachment shaft 45 is a power transmission shaft detachably coupled to the rotation shaft 26 in the axial direction. Removal or mounting of the detachment shaft from the rotary shaft is possible through the horizontal moving carriage (46). The horizontal movement bogie 46 includes a bogie portion 462 that is mounted on a rail 463 disposed parallel to the rotation axis direction on the surface of the tube forming line and a shaft support 462 vertically installed on the bogie portion and supporting the bogie shaft 461). The mounting height of the detachable shaft 45 is formed to be the same height as each rotation axis of the roller assembly 24 mounted on the stationary stand 21. In addition, the rotation shaft 26 and the detachment shaft 45 are engaged with each other at an axial end thereof with a key in the axial direction and at the other end with a keyway in the inner surface thereof, And is provided with a structure in which rotational force transmission is possible. In addition, the shaft support 461 may be composed of one or a plurality of vertical plates so that the attachment / detachment axes are coupled with each other at two or more points to provide stable support, or a plurality of brackets may be provided to increase the structural strength. In addition, the shaft support 461 may be provided with a height adjusting device to automatically adjust the fixing height of the removable shaft. Various methods such as height adjustment by a rack and a pinion can be applied.

In addition, the connection shaft 44 may be provided with a variable structure. For example, in order to allow the removable shaft 45 to move in the axial direction while the motor 41 and the speed reducer 42 of the power transmission device are fixed to the line surface, the connection shaft is separated to secure a space, The horizontal movement bogie 46 can be moved without separating the connection shaft so that the removal shaft 45 can be separated from the rotary shaft 26 by changing the length of the connection shaft 44. [ have.

4B, the connection shaft 44 is divided into a first connection shaft 441 and a second connection shaft 442, and one end of the first connection shaft is inserted into the second connection shaft in the axial direction A plurality of keys are formed on the outer surface of the first connecting shaft in the axial direction and a keyway corresponding to the key is formed on the inner surface of the second connecting shaft so that the first connecting shaft and the second connecting shaft are moved in the axial direction, It is possible to transmit the rotational force while stretching the shaft length.

The range in which the first connecting shaft 441 and the second connecting shaft 442 are expanded and contracted is formed to be larger than the moving distance of the horizontal moving truck 46 that is moved to remove the removable shaft from the rotating shaft, The change in the length between the moving truck and the speed reducer can be offset in the connecting shaft. It is preferable that the stretching / shrinking range is formed to be 1 to 3 times, more preferably 1 to 2 times, the moving distance of the horizontal moving carriage. That is, if the moving distance of the horizontal moving carriage is excessively long, the length of the connecting shaft is increased to increase the apparatus cost, so that it is desirable to provide the stretchability while keeping the length of the connecting shaft as short as possible.

Further, a limit sensor may be mounted on the horizontal moving bogie to limit the forward and backward distances in the axial direction, and the moving motor may be mounted so that the forward and backward movement can be automatically performed by operating the button.

Hereinafter, an operation state of the tubular machine of the present invention will be briefly described.

When the size of the tube to be formed is changed, the horizontal movement truck 46 is moved to detach the detachment shaft 45 from the rotary shaft 26 of the roller assembly 24.

When the detachment shaft is separated, the pressurizing force is applied to the roller assembly holding block 27 by inserting the pressurizing rod 341 into the pressurizing cylinder 34 of the presser base 33, To be displaced from the upper part of the roller assembly.

When the pressurizing pedestal 33 is moved, the lug 291 of the roller assembly is connected to the lifting unit so that the roller assembly is moved upward and removed from the stationary stand.

Next, the other roller assembly 24 on which the shaping rollers of the size to be changed is disposed is vertically mounted to the stationary stand 21, and the pressure is transferred to the upper portion of the roller assembly 33, 341 are pulled out to press the engagement block 27 of the roller assembly.

The motor 41 of the power transmission device is operated to move the power generated by the power transmission device to the output shaft 43 and the connecting shaft 44 and the detachment shaft 45 and the forming roller provided on the rotating rotary shaft is also rotated to perform tube forming so that the time for replacing the roller can be remarkably shortened and the operating time can be increased, Can be greatly improved.

10: Blower
20: forming roller device
21: stationary stand 22: first vertical guide member
23: second vertical guide member 24: roller assembly
25: forming roller 26, 26a:
27: Retaining block 28:
29: Connection bar
211: Base 212: Vertical bar
213: guide groove 214: gap retaining frame
251: upper roller 252: lower roller
253: side roller 271: projection
272: connecting portion 273: vertical opening
291: Lug 292: Ring
30: Fixed pressure device
31: horizontal guide member 32: vertical support member
33: Pressurizing coil 34: Pressurizing cylinder
35: limit sensor 36: lock cylinder
311: Rail 331: Moving motor
332: horizontal body 333: drive wheel
334: driven wheel 341: pressing rod
40: Power transmission device
41: motor 42: speed reducer
43: output shaft 44: connecting shaft
45: Dismounting shaft 46: Horizontal moving carriage
441: first connection shaft 442: second connection shaft
461: shaft support 462:
463:

Claims (5)

A forming roller device composed of a roller assembly in which a plurality of forming rollers are formed integrally with a standard and a fixing stand for fixing the roller assembly, and a locking function for fixing and releasably opening the roller assembly of the forming roller device to the fixing stand And a power transmitting device for transmitting the power to the forming roller device to rotate the forming roller;
The fixing stand of the forming roller device comprises:
A base installed along the steel pipe forming line and installed on the line surface; A vertical bar is provided on each of both sides of the forming line in the upper part of the base, and the pair of vertical bars are constituted by first and second vertical guide members having guide grooves formed on the opposite surfaces,
Wherein the roller assembly of the forming roller apparatus comprises:
A plurality of shaping rollers vertically arranged vertically so as to press the side surface of the steel pipe; A rotating shaft axially installed in the forming roller; Wherein the first and second vertical guide members are slidably coupled to the first and second vertical guide members so as to be perpendicular to the first and second vertical guide members, A plurality of latching blocks each of which has a connecting portion having a vertical through hole protruding outwardly from both sides of the forming line; An interval adjusting bar installed between the upper and lower engaging blocks to separate the engaging blocks from each other; A connecting bar which is inserted into a vertical hole of a plurality of latching blocks disposed in the upper and lower positions sequentially and which is coupled by a nut and a latch block whose lower end is disposed at the lowermost part; And a lug which is fixedly coupled to the connection bar by a nut and has a ring formed at an upper portion thereof in the form of a bar connecting horizontally the upper ends of the two connection bars coupled to both sides of the rotation axis. delete The method according to claim 1,
The fixed pressure device,
A horizontal guide member coupled to both ends of the upper ends of the first and second vertical guide members and extending in the direction of the rotation axis,
A vertical support member vertically coupled to an end of the horizontal guide member opposite to an end coupled with the first vertical guide member;
A pressurizing base which is slidably and horizontally movable on the horizontal guide member and on which a moving motor is installed;
A pressurizing cylinder provided on both sides in the direction of the rotational axis of the pressurizing unit to press the upper end of the upper engaging block of the roller assembly and to fix the presser rod;
And a limit sensor provided on the front and rear sides of the horizontal guide member to limit a moving distance of the pressing movable base. The method according to claim 1,
The power transmission device includes:
A motor;
A decelerator for decelerating rotation of the motor and distributing power;
An output shaft horizontally projected from one side of the speed reducer;
A connecting shaft having one end connected to the output shaft by a universal joint;
A detachment shaft having one end connected to the connection shaft by a universal joint and the other end detachably coupled to the rotation shaft of the forming roller;
And a horizontal moving truck having a shaft support which fixes the detachment shaft so as to be held horizontally with the rotation shaft, and a bogie part which is seated on a lane part provided in parallel with the rotation axis on the line surface to perform linear movement,
Wherein a plurality of keys are axially formed on an inner surface of the inner groove and a key groove corresponding to the inner groove is formed on an inner surface of the rotation shaft, And the coupling and detachment are performed while being moved in the axial direction. 5. The method of claim 4,
The connecting shaft is divided into a first connecting shaft and a second connecting shaft, one end of the first connecting shaft is inserted into one end of the second connecting shaft, the key and the keyway are formed in the axial direction so that the connecting shaft is axially expanded and contracted, However,
Wherein the range in which the first connecting shaft and the second connecting shaft are expanded and contracted is formed to be one to three times the moving distance of the horizontal moving cart to be removed from the rotary shaft.

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