KR101874943B1 - Auto welding apparatus for corrugation plate - Google Patents

Abstract

It is an object of the present invention to provide an automatic welding apparatus for a corrugated plate which is configured to adjust the axes in various directions and is highly adaptable to various types of wrinkles.
An automatic welding apparatus for a corrugated plate according to an embodiment of the present invention includes: a running rail fixed to an upper surface of a corrugated plate; A carriage which moves along the longitudinal direction of the running rail and is movable along a weld line of the corrugated plate; A welding header coupled to the carriage and having a welding torch; A traveling axis driving unit provided on the carriage and moving the carriage along the traveling rail; A welding header height shaft driving unit provided on the carriage and adjusting a height of the welding header; A welding header rotating shaft driving unit provided in the carriage and adjusting a tilt of the welding head with respect to a traveling direction of the carriage; A welding torch height axis driving unit provided in the welding header for adjusting an interval between the welding torch and the corrugated plate; And a welding line tracking axis driving unit provided in the welding header and adjusting a welding line width direction position of the welding torch.

Description

{AUTO WELDING APPARATUS FOR CORRUGATION PLATE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding apparatus for a corrugated plate, and more particularly, to an automatic welding apparatus for a corrugated plate which can automatically follow a corrugated shape of corrugated plate having various corrugations.

In the membrane type LNG cargo holds, a structure composed of a primary barrier and a secondary barrier is widely used. Here, as the primary barrier and the secondary barrier, a metal material such as a corrugated thin plate Invar or stainless steel is mainly used.

Therefore, such a metal barrier is a key production technique of welding a corrugated membrane sheet (a corrugated membrane sheet) installed on a barrier wall. Therefore, in the production of such an LNG hold, automatic lap welding technology of a corrugated membrane sheet that absorbs thermal stress is an important factor determining manufacturing productivity.

Meanwhile, as the membrane sheet used as the barrier of the LNG hold, a protruded pleated membrane sheet having a wrinkle protruding upward or a concave pleated membrane sheet having a wrinkle recessed downward can be used. Here, the wrinkles of the membrane sheet are generally formed in a lattice form.

Recently, as shown in FIG. 1, an LNG cargo hold comprising a protruding corrugated membrane sheet 10 as a primary barrier and a depressed corrugated membrane sheet 20 as a secondary barrier has been developed and constructed.

However, in the conventional automatic membrane sheet welding apparatus, the X axis as a running axis for moving the welding torch along the weld line, the Y axis for adjusting the height of the welding torch and the R axis for adjusting the tilt angle of the welding torch are adjusted So that it is disadvantageous in that the flexibility of various types of wrinkles formed on the membrane sheet is low. Such a conventional membrane sheet automatic welding apparatus is disclosed in Japanese Patent Registration No. 0732311.

In addition, since the membrane sheet automatic welding apparatuses according to the prior art are limited to the structure for fixing the running rail to the protruding corrugations, the applicability to the membrane sheet 20 formed with the depressed corrugations is low.

The present invention has been made to solve at least some of the problems of the prior art as described above, and it is an object of the present invention to provide an automatic welding apparatus for a corrugated plate, which is capable of adjusting axes in various directions, The purpose is to provide.

Another object of the present invention is to provide an automatic welding apparatus for a corrugated plate which is capable of stably welding a membrane sheet on which a depressed wrinkle is formed.

According to one aspect of the present invention, there is provided a traveling rail comprising: a traveling rail fixed to an upper surface of a corrugated plate; A carriage which moves along the longitudinal direction of the running rail and is movable along a weld line of the corrugated plate; A welding header coupled to the carriage and having a welding torch; A traveling axis driving unit provided on the carriage and moving the carriage along the traveling rail; A welding header height shaft driving unit provided on the carriage and adjusting a height of the welding header; A welding header rotating shaft driving unit provided in the carriage and adjusting a tilt of the welding head with respect to a traveling direction of the carriage; A welding torch height axis driving unit provided in the welding header for adjusting an interval between the welding torch and the corrugated plate; And a welding line tracking axis driving unit provided in the welding header and adjusting a welding line width direction position of the welding torch.

According to another aspect of the present invention, there is provided an automatic welding apparatus comprising: a first contact type displacement sensor provided in the welding header and contacting a surface of a corrugated plate to sense a shape of a corrugated plate; And a second contact type displacement sensor provided in the welding header and contacting the surface of the corrugated plate to sense the shape of the corrugated plate.

Further, the automatic welding apparatus according to an embodiment of the present invention may further include an unevenness detecting sensor provided on the carriage and detecting irregularities of the corrugated plate using light.

Further, the automatic welding apparatus according to an embodiment of the present invention includes a pressing means provided on the welding head so as to match the behavior of the welding torch and pressing the corrugated plate downward, and the pressing means is capable of adjusting the pressing force Lt; / RTI >

Further, the automatic welding apparatus according to an embodiment of the present invention may further include a clamp member for fixing the running rail to protruding corrugations protruding from the upper portion of the corrugated plate.

In addition, the automatic welding apparatus according to an embodiment of the present invention may further include a rail fixing unit for fixing the running rail to a flat corrugated plate formed with depressed wrinkles which are depressed downward.

According to another aspect of the present invention, there is provided an automatic welding apparatus including a clamp fixing unit coupled to a corrugated plate having a concaved corrugated concave downwardly formed therein to form protruding corrugations on a corrugated plate, Can be mounted on the corrugated plate formed with the concave corrugations via the clamp fixing unit.

According to the embodiment of the present invention having such a configuration, it is possible to automatically perform the welding work of the plate material having the wrinkles of various shapes and to obtain the effect that the welding quality is improved.

FIG. 1 is a view showing a barrier structure of an LNG cargo hold in which the primary barrier is a protruding corrugated membrane sheet and the secondary barrier is a depressed corrugated membrane sheet.
2 is a perspective view of an automatic welding apparatus according to an embodiment of the present invention.
3 is a front view of the automatic welding apparatus shown in Fig.
4 is a bottom view of the automatic welding apparatus shown in Fig.
FIG. 5 is a perspective view illustrating a traveling axis driving unit included in the automatic welding apparatus shown in FIG. 2. FIG.
6 is a perspective view showing a base frame, a rail clamp, and a travel drive motor of the travel axis driving unit shown in FIG.
7 is a perspective view showing the manual traveling clutch of the driving shaft driving part shown in FIG.
FIG. 8 is a perspective view illustrating a welding header height axis driving unit included in the automatic welding apparatus shown in FIG. 2. FIG.
9 is a perspective view illustrating a connection structure of the welding header height axis driving unit and the welding headers shown in FIG.
10 is a perspective view illustrating a welding header rotational axis driving unit included in the automatic welding apparatus shown in FIG.
11 is a perspective view showing a rotating bar and a welding head rotating link structure of the welding header rotating shaft driving part shown in FIG.
FIG. 12 is a perspective view showing a gear structure and a rail structure of the welding header rotation axis driving portion shown in FIG. 10; FIG.
13 is an exploded perspective view of the welding header rotating shaft driving unit shown in FIG.
14 is an operating state diagram schematically showing the operation of adjusting the welding torch inclination of the welding header rotary shaft driving part shown in Fig.
15 is a perspective view showing a state in which a running rail is installed on a protruding ridge through a clamp member included in an automatic welding apparatus according to an embodiment of the present invention.
16 is a plan view of the clamp member shown in Fig.
17 is a front view of the clamp member shown in Fig.
18 is a side view of the clamp member shown in Fig.
19 is a perspective view showing a rail fixing unit included in an automatic welding apparatus according to an embodiment of the present invention.
FIG. 20 is a perspective view showing an operation of an automatic welding apparatus according to an embodiment of the present invention to weld a depressed wrinkle. FIG.
FIG. 21 is a perspective view showing a clamp fixing unit included in an automatic welding apparatus according to another embodiment of the present invention installed on a depressed corrugated membrane sheet. FIG.
22 is a perspective view of the clamp fixing unit shown in Fig.
23 is a perspective view showing a state in which a running rail is installed on a pleated plate using the clamp fixing unit shown in Fig.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, referring to FIG. 2 to FIG. 4, the overall configuration of an automatic welding apparatus 100 according to an embodiment of the present invention will be described.

2 to 4, an automatic welding apparatus 100 according to an embodiment of the present invention includes a traveling rail 110, a carriage 120, a welding header 130, and a welding torch 140 can do.

The running rail 110 may be fixed to the upper surface of the corrugated plate, which is an object to be welded of the automatic welding apparatus 100 according to an embodiment of the present invention. The structure in which the running rail 110 is fixed to the corrugated plate will be described later with reference to Figs. 15 to 19. Fig.

The running rail 110 may be formed of a linear beam and may be installed parallel to the weld line W of the corrugated plate.

In one embodiment, the running rail 110 may have a rack gear 112 along its length in the center. The rack gear 112 can be engaged with the pinion gear 155 of the driving shaft driving unit 150, which will be described later.

The carriage 120 may move along the longitudinal direction of the running rail 110 and move along the weld line W of the corrugated plate. In the automatic welding apparatus 100 according to an embodiment of the present invention, Correspond to the main body in which the components are installed.

The welding head 130 is coupled to one side of the carriage 120 and can move in the longitudinal direction of the traveling rail 110 of the traveling rail 110 according to the movement of the carriage 120 along the traveling rail 110 have.

The welding head 130 includes a welding side of a welding torch 140, a weld line tracking axis driving unit 210, a welding head angle sensor 190, a first contact type displacement sensor 220, (230) may be provided.

The welding torch 140 is an apparatus for generating an arc to perform welding of the corrugated plate, and the welding head 130 may have the same behavior. In one embodiment, the welding torch 140 may be coupled to a torch mounting portion 142 provided in the weld header 130.

The automatic welding apparatus 100 according to an embodiment of the present invention having such a structure can weld the corrugated plate using the welding torch 140 while traveling along the running rail 110 installed on the corrugated plate.

The automatic welding apparatus 100 according to an embodiment of the present invention includes a traveling axis (X axis) moving along the traveling rail 110, a height of a welding header 130 for adjusting the height of the welding header 130, The welding torch 140 adjusts the height of the welding torch 140 by adjusting the height of the welding torch 140. The welding torch 140 adjusts the height of the welding torch 140, (Z axis) that adjusts the welding position of the welding torch 140 in the width direction of the welding torch 140 so that the welding torch 140 and the welding torch 140 track the welding line W. [ So that a corrugated plate having various types of corrugations can be welded.

For this, the automatic welding apparatus 100 according to an embodiment of the present invention includes a driving axis driving unit 150 (X axis adjusting), a welding header height axis driving unit 160 (Y axis adjusting), a welding header rotating axis driving unit 170 ), A welding torch height axis driving unit 200 (AVC axis adjustment), and a weld line tracking axis driving unit 210 (Z axis adjustment).

The automatic welding apparatus 100 according to an embodiment of the present invention includes the traveling axis driving unit 150, the welding header height axis driving unit 160, the welding header rotating axis driving unit 170, the welding torch height axis driving unit 200, And a control unit (not shown) for controlling the weld line tracking axis driving unit 210.

5 to 14, a structure in which five shafts of the automatic welding apparatus 100 according to an embodiment of the present invention are driven will be described.

5 to 7 show a driving axis driving unit 150. [

6 is a perspective view showing the base frame 151, the rail clamp 153, and the travel drive motor, and FIG. 7 is a perspective view showing the manual travel clutch 158, Fig.

In the present invention, the driving axis driving unit 150 is provided in the carriage 120 and is capable of moving the carriage 120 along the driving rail 110.

5 to 7, in one embodiment, the traveling axis driving unit 150 includes a base frame 151, a traveling roller 152, a rail clamp 153, a pinion gear 155, And a manual-traveling clutch 158. [0035]

The base frame 151 may be provided at the bottom of the carriage 120 to form a part of the base frame 151.

The traveling roller 152 is provided at the bottom of the base frame 151 and is capable of movably mounting the base frame 151 on the traveling rail 110.

In one embodiment, the traveling rollers 152 may be symmetrically provided on both sides of the base frame 151 so as to grip both ends of the traveling rail 110, but the present invention is not limited thereto.

2 to 4, the driving roller 152 may be configured to be in contact with the inclined surface or the bottom surface at both ends of the running rail 110, so that the base frame 151 and the carriage 120 are in contact with each other, Can be prevented from being deviated from the running rail 110 during running.

The rail clamp 153 presses the traveling roller 152 against the traveling rail 110 so that the traveling roller 152 firmly contacts the traveling rail 110.

To this end, in one embodiment, the rail clamp 153 pushes the driving roller 152 provided on one side of the driving roller 152 provided on both sides of the base frame 151 to adjust the position of the driving roller 152 Or < / RTI >

6, the rail clamp 153 can be operated through a tightening screw 154 which can apply pressure to the driving roller 152 and restrain the position of the driving roller 152. [

The automatic welding apparatus 100 according to an embodiment of the present invention having such a structure is capable of adjusting the position of the driving roller 152 and can be applied to a driving rail 110 of various sizes.

The pinion gear 155 is rotatably coupled to the base frame 151 and can be engaged with the rack gear 112 provided on the traveling rail 110.

In addition, the travel driving motor is provided in the base frame 151 and can rotate the pinion gear 155. In one embodiment, the travel drive motor may be configured to transmit the rotational force to the pinion gear 155 through the speed reducer 157. [

Here, the control unit may control the traveling drive motor and the speed reducer 157 to control the traveling speed of the automatic welding apparatus 100, that is, the welding speed.

Meanwhile, the manual traveling clutch 158 can move and position the pinion gear 155 in the width direction of the running rail 110. [

7, the hinge shaft 159 provided on the base frame 151 supports the drive motor, the speed reducer 157, and the pinion gear 155. In this embodiment, And can be rotatable in the width direction of the running rail 110 in the base frame 151.

The manual traveling clutch 158 can be engaged or disengaged with the rack gear 112 of the traveling rail 110 while the pinion gear 155 is rotating.

Accordingly, the user can manually adjust the position of the automatic welding device 100 in a state where the manual traveling clutch 158 is operated to remove the pinion guide from the rack gear 112 of the traveling rail 110, Can be performed.

Further, the manual traveling clutch 158 may be rotated about the hinge shaft 159, and then the bolts provided at the ends may be tightened to fix the position of the pinion gear 155. The position of the pinion gear 155 of the manual traveling clutch 158 allows the automatic welding apparatus 100 according to the embodiment of the present invention to move the rack gears 112 in various manners 110). ≪ / RTI >

8 and 9 show the weld header height axis driver 160. [

FIG. 8 is a perspective view of the welding header height axis driving unit 160 viewed from the right, and FIG. 9 is a perspective view of the welding header height axis driving unit 160 as viewed from the left.

In the present invention, the welding header height axis driving unit 160 is provided in the carriage 120, and the height of the welding header 130 can be adjusted.

8 and 9, the welding header height axis driving unit 160 may include a ball screw 161, an elevation driving motor 162, and an elevation guide rail 164.

The ball screw 161 may include a screw shaft 161a and a lifting nut 161b which is coupled to the screw shaft 161a and moves up and down according to the rotation of the screw shaft 161a.

Here, the lifting nut 161b may be coupled to the welding header 130 to lift the welding header 130 up and down. In one embodiment, the lifting nut 161b may be coupled to the lifting frame 171 coupled to the weld header 130, described below, as shown in Figs. 8 and 9.

The elevation driving motor 162 may be connected to the screw shaft 161a by a power transmission belt 163 to rotate the screw shaft 161a. However, the present invention is not limited thereto, and the elevation driving motor 162, The shaft 161a may be configured as a gear for power transmission.

The elevation drive motor 162 can be driven by the control unit.

The elevation guide rail 164 is long in a direction perpendicular to the carriage 120 so as to support the upward and downward movement of the welding header 130.

In one embodiment, the elevating guide rail 164 may be composed of a rail member capable of sliding in a state in which the elevating frame 171 is engaged. The elevating guide rails 164 can perform a function of maintaining the upward / downward trajectory of the elevating guide rail 164 in the vertical direction so as to prevent the elevating / lowering guide rails 164 from being horizontally swung or inclined during the elevating operation of the welding header 130.

In addition, for example, the elevation guide rails 164 may be provided on both sides of the carriage 120 as shown in Figs. The elevation guide rails 164 provided on both sides of the carriage 120 support both sides of the lifting frame 171 so that the welding headers 130 can be steered up and down in a vertical direction without being distorted.

10 to 14 show a welding header rotational shaft driving part 170. [

11 is a perspective view showing a rotating link structure of the welding header 130 and the welding header rotating shaft driving part 170. FIG. 12 is a perspective view of the welding header rotating shaft driving part 170. FIG. 13 is an exploded perspective view of the welding header rotary shaft driving part 170 and FIG. 14 is a perspective view showing the welding head rotary shaft driving part 170 and the welding torch 140 driving tilting operation Which is schematically shown in Fig.

In the present invention, the welding header rotation axis driving part 170 is provided in the carriage 120 and can control the inclination of the welding header 130 with respect to the running direction of the carriage 120. [ That is, the welding header rotation axis driving unit 170 can rotate the welding header 130 and the welding torch 140 coupled thereto to the carriage 120 in the traveling direction and the traveling direction.

10 to 13, the welding header rotating shaft driving part 170 includes a lifting frame 171, a rotation driving motor 172, a rotating gear 173, a first link driving gear 174, The first welding head rotating link 178 and the second welding head rotating link 179 are connected to the driving gear 175, the idle gear 176, the first rotating bar 177-1, the second rotating bar 177-2, A torsion rail 180, a link support block 181, and a weld header angle sensor 190. As shown in FIG.

The lifting frame 171 is connected to the welding header height axis driving part 160 and can be raised and lowered, and a welding header 130 can be connected to one side.

The rotation drive motor 172 is provided on the other side of the lift frame 171 and can rotate the rotation gear 173. The rotation drive motor 172 can be controlled in operation by the control unit.

The rotary gear 173 is provided on one side of the lifting frame 171 and can be rotated by the rotation driving motor 172. In one embodiment, the rotary gear 173 may be a spur gear, but is not limited thereto.

The first link driving gear 174 and the second link driving gear 175 are provided at one side of the lifting frame 171 and are symmetrically disposed on both sides of the rotary gear 173 under the rotary gear 173 . That is, the rotary gear 173, the first link drive gear 174, and the second link drive gear 175 may be arranged in an arrangement structure of an equilateral triangle or an isosceles triangle in which the rotary gear 173 is disposed at the upper vertex.

At this time, the rotary gear 173, the first link drive gear 174, and the second link drive gear 175 are spaced apart from each other so as not to be engaged with each other.

The idle gear 176 is provided so as to engage with both the rotary gear 173, the first link drive gear 174 and the second link drive gear 175 so that the rotational force of the rotary gear 173 is transmitted to the first link drive gear 174. [ (174) and the second link drive gear (175). Accordingly, the first link drive gear 174 and the second link drive gear 175 can be rotated in the same direction as the rotation direction of the rotary gear 173.

The idle gear 176 can stably transfer the rotational force of the rotary gear 173 to the first link drive gear 174 and the second link drive gear 175 without loss.

Meanwhile, the first rotary bar 177-1 may be connected to the first link drive gear 174 through the first lower end fastening hole 177-1a formed at the lower end thereof in such a way that the rotational behavior thereof may be coincident, Lt; / RTI >

The second rotary bar 177-2 can be connected to the second link drive gear 175 through the second lower end fastening hole 177-2a formed at the lower end thereof in such a way that the rotational behavior thereof can be matched, Lt; / RTI >

The first rotation bar 177-1 and the second rotation bar 177-2 may be disposed parallel to each other. When the first link drive gear 174 and the second link drive gear 175 are rotated The first link drive gear 174 and the second link drive gear 175 have the same rotational behavior and can be inclined at the same angle while maintaining a parallel state.

The first welding header rotating link 178 includes a pair of first upper hinge parts 178a symmetrically formed on both sides of the upper end of the first welding head rotating link 178, And the second upper coupling hole 177-2b provided at the upper ends of the first rotary bar 177-1b and the second rotary bar 177-2, respectively.

The first welding header rotating link 178 may be rotatably connected to the welding header 130 by a first lower hinge portion 178b provided at the lower end thereof.

The first welding header rotating link 178 can maintain a vertical upright state even if the first rotating bar 177-1 and the second rotating bar 177-2 are rotated together at any angle.

The second welding head rotating link 179 includes a pair of second upper hinge parts 179a symmetrically provided on both sides of the upper end of the first welding head rotating link 179. The second upper hinge part 179a is disposed between the upper and lower ends of the first rotating bar 177-1, And a second central fastening hole 177-2c formed between the upper and lower ends of the central fastening hole 177-1c and the second rotating bar 177-2, respectively.

In one embodiment, the first central fastening hole 177-1c is formed at a middle height of the first rotating bar 177-1, and the second joining hole is formed at a middle height of the second rotating bar 177-2 But it is not limited thereto.

In addition, the second lower header hinge portion 179b provided at the lower end of the second welding header rotating link 179 may be rotatably connected to the welding header 130. [

The second welding header rotating link 179 is vertically rotated even when the first rotating bar 177-1 and the second rotating bar 177-2 are rotated together at the same angle as the first welding header rotating link 178 It is possible to maintain the upright state.

Meanwhile, the first welding header rotating link 178 and the second welding header rotating link 179 may be vertically spaced and connected to the welding header 130. 13, the first lower hinge portion 178b of the first welded header rotation link 178 is connected to the second lower hinge portion 179b of the second welded header rotation link 179 via the welding headers 179b, (Not shown).

With such a configuration, the first welding header rotating link 178 and the second welding header rotating link 179 rotate in accordance with the rotation of the first rotating bar 177-1 and the second rotating bar 177-2, A welding header 130 connected to the first welding header rotating link 178 and the second welding header rotating link 179 vertically as shown in FIGS. 14 (a), (b) and (c) Is inclined according to the change in position between the first lower hinge part 178b and the second lower hinge part 179b.

The welding head rotational axis driving unit 170 performing the above-described operation moves the welding torch 140 and a first contact type displacement sensor 220, which will be described later, as shown in Figs. 14A, 14B and 14C So that a rotational motion with the rotation center can be realized.

In other words, the welding head rotation axis driving unit 170 only changes the inclination posture of the welding torch 140 and the first contact type displacement sensor 220, and does not cause vertical and lateral movement of the position.

Meanwhile, the curved rail 180 may be curved in a circular arc shape on one side of the lift frame 171. In one embodiment, the tear rails 180 may be formed to surround the upper portion of the rotary gear 173.

In addition, the link support block 181 is movable along the curved rail 180, and the first rotating bar 177-1 and the second rotating bar 177-2 can be rotatably coupled.

In one embodiment, as shown in FIG. 13, the first link clamping hinge 177-1d of the first rotating bar 177-1 and the second link clamping hinge 177-1 of the second rotating bar 177-2 -2d may be rotatably coupled to both ends of the link support block 181. [

Here, the first link fastening hinge 177-1d may be provided between the first upper fastening hole 177-1b and the first central fastening hole 177-1c of the first rotating bar 177-1 But is not limited thereto, and may be provided at the same height as the first upper fastening hole 177-1b. Similarly, the second link fastening hinge 177-2d is also provided between the second upper fastening hole 177-2b and the second central fastening hole 177-2c of the second rotating bar 177-2 But it is not limited thereto and may be provided at the same height as the second upper fastening hole 177-2b.

The link support block 181 slides on the curved rail 180 in accordance with the rotation of the first rotary bar 177-1 and the second rotary bar 177-2 so that the first rotary bar 177-1 177-1 and the second rotating bar 177-2 can be firmly supported.

In other words, the groove rail 180 and the link support block 181 can minimize the shaking of the welding head 130 and the welding torch 140, thereby improving the welding quality.

Meanwhile, the welding head angle sensor 190 may measure the inclination of the welding header 130 rotated by the welding head rotational axis driving unit 170.

The welding head angle sensor 190 is connected to the control unit and the control unit can control the welding head rotational axis driving unit 170 based on the inclination value of the welding head 130 measured by the welding head angle sensor 190.

That is, based on the slope value of the weld header 130 measured by the weld header angle sensor 190, the control unit calculates the slope of the current weld header 130 when the corrugated portion of the corrugated plate is welded, The welding torch rotation axis driving unit 170 is controlled by comparing the inclination values of the welding torch 140 and the welding torch 140 so that the welding torch 140 can be inclined to the shape of the wrinkle portion.

10 is a perspective view of the welding torch height axis driving unit 200 and the weld line tracking axis driving unit 210. As shown in FIG.

In the present invention, the welding torch height axis driving unit 200 is provided in the welding header 130 and can control the length of the arc generated by the welding torch 140 by adjusting the distance between the welding torch 140 and the corrugated plate .

The welding line tracking axis driving unit 210 is provided in the welding header 130 and adjusts the position of the welding torch 140 in the width direction of the welding line W so that the welding torch 140 performs welding along the welding line W The horizontal position of the welding torch 140 can be adjusted.

The welding torch height axis driving unit 200 and the weld line tracking axis driving unit 210 may be operated automatically by the control unit or manually by a user.

10, the welding torch height axis driving unit 200 may include a torch height axis block 201, an elevation driving unit 202, and a torch lifting and lowering rail 203. As shown in FIG.

Here, the torch height shaft block 201 is vertically movable in the welding header 130, and the welding torch 140 can be connected to the welding torch 140 through the torch tracking shaft block 211 described later.

Further, the elevation driving unit 202 can raise and lower the torch height axis block 201. For example, the elevation driving unit 202 may include a ball skew member 202b to which the torch height shaft block 201 is coupled and a motor 202a for rotating the ball screw member 202b , But is not limited thereto.

The torch lifting and lowering rail 203 is fixed to the welding header 130 and is a rail member to which the torch height shaft block 201 is vertically coupled so that the torch height shaft block 201 can be stably It is possible to perform the function of maintaining the ascending / descending locus of the torch height axis block 201 so as to be able to ascend and descend.

The weld line tracking axis driving unit 210 may include a torch tracking axis block 211, a horizontal driving unit 212, and a torch horizontal rail 213.

Here, the torch tracking axis block 211 is horizontally movable in the width direction of the weld line W in the torch height axis block 201, and the welding torch 140 can be coupled in a consistent manner. 10, a welding torch 140 is omitted to facilitate understanding of the drawing, and instead, a torch mounting portion 142 to which a welding torch 140 is mounted is shown.

In addition, the horizontal drive unit 212 can horizontally move the torch tracking axis block 211 in the width direction of the weld line W. For example, the horizontal drive unit 212 may include a ball screw member 212b to which the torch tracking axis block 211 is coupled and a motor 212a to rotate the ball screw member 212b, But is not limited thereto.

The torch horizontal rail 213 is a rail member fixed to the torch height axis block 201 and the torch tracking axis block 211 is coupled horizontally in the width direction of the weld line W, It is possible to maintain the movement locus of the torch tracking axis block 211 so that the robot 211 can stably move without rocking or detaching.

The automatic welding apparatus 100 according to an embodiment of the present invention includes a first contact type displacement sensor 220, a second contact type displacement sensor 230, an unevenness detection sensor 240 and a pressing means 250 .

The first contact type displacement sensor 220 and the second contact type displacement sensor 230 are provided in the welding header 130 and can detect the shape of the corrugated plate by contacting the surface of the corrugated plate during welding.

In addition, in one embodiment, the first contact type displacement sensor 220 is disposed behind the second contact type displacement sensor 230 with respect to the running direction of the carriage 120 as shown in FIGS. 2 and 4 .

In this configuration, the first contact type displacement sensor 220 can sense the height of the corrugated plate, and the second contact type displacement sensor 230 can sense the inclination of the corrugated plate. That is, the second contact type displacement sensor 230 senses the shape of the corrugated plate ahead of the first contact type displacement sensor 220 when the carriage 120 travels, and detects the inclination of the corrugated portion of the corrugated plate formed in the welding progress direction .

On the other hand, the control unit controls the driving axis driving unit 150, the welding header height axis driving unit 160 and the driving axis driving unit 160 based on the shape information of the corrugated plate sensed by the first contact type displacement sensor 220 and the second contact type displacement sensor 230 It is possible to control the welding head rotating shaft driving unit 170.

For example, the control unit can control the height of the welding torch 140 by controlling the welding head height axis driving unit 160 based on the height value of the corrugated plate sensed by the first contact type displacement sensor 220, The position of the welding torch 140 can be maintained perpendicular to the welding surface by controlling the welding header rotation axis driving part 170 based on the inclination value of the corrugated plate detected by the two contact type displacement sensor 230. [

In addition, in one embodiment, the control unit calculates the running speed of the carriage 120 through the first contact type displacement sensor 220, compares the running speed of the carriage 120 with a preset reference welding speed, and calculates the running speed of the carriage 120 in real time And the traveling axis driving unit 150 can be controlled based on the calculated traveling speed.

The irregularity detection sensor 240 is provided in the carriage 120 and can irradiate the surface of the corrugated plate to detect irregularities of the corrugated plate.

Here, the control unit may control the welding header height axis driving unit 160 and the welding header rotation axis driving unit 170 based on the shape information of the corrugated plate in the unevenness detection sensor 240.

For example, the control unit determines welding conditions (peak, welding current, and welding current) for each section of the corrugation on the basis of the corrugated plate shape information sensed by the corrugated sensor and the inclination of the welding torch 140 measured by the welding head angle sensor 190, The welding pulse frequency, the pilot gas amount, the width of the current pulse, etc.) can be adjusted according to the welding characteristic of each section of the corrugation.

The pressing means 250 is provided in the welding header 130 and can press the corrugated plate downward during welding. That is, the pressing means 250 can make a plurality of plate materials welded to each other closely contact each other without lifting at the weld line W. The pressing means 250 may be fixed to the welding header 130 such that the welding torch 140 and the welding torch 140 have the same behavior.

In one embodiment, the pressing means 250 is configured to have a box-shaped body fixed to the weld header 130 and extending downward as shown in FIG. 20, and a pressing roller 252 at the lower end .

Here, the pressing roller 252 can minimize the welding gap between the plate materials to be welded by pressing the corrugated plate while rolling the surface of the corrugated plate while pressing it.

Since the pressing force can be variously adjusted according to the characteristics of the corrugated plate through the pressing means 250 capable of controlling the pressing force, the welding quality can be improved.

In one embodiment, the pressure roller 252 can be resiliently supported on the body of the pressing means 250 by a spring (not shown) capable of adjusting the resilient restoring force. In such a configuration, the pressing force can be adjusted by adjusting the length and the elastic modulus of the spring that provides the elastic restoring force to the pressure roller 252.

The structure in which the pressing roller 252 is resiliently supported by the spring in this manner allows the corrugated plate to be pressed with a substantially constant force through the elastic restoring force of the spring even when the gap between the welding torch 140 and the corrugated plate is slightly changed, . Thereby, it is advantageous that the gap between the corrugated plates is suppressed and the welding quality is improved.

Further, in another embodiment, the pressing means 250 may be provided with a load cell (not shown) for measuring the pressing load of the pressing roller 252. Here, the control unit for controlling the welding torch height axis driving unit 200 may control the welding torch height axis driving unit 200 such that the length of the welding arc is constant according to the shape of the corrugated plate, based on the pressing load measurement value of the load cell .

For example, the user may set the pressure roller 252 to press the corrugated plate to the initial pressing load before the start of the welding operation, set the height of the welding torch 140 to the desired welding arc length, The pressing load of the pressure roller 252 measured by the load cell changes depending on the surface shape of the corrugated plate. At this time, the control unit automatically controls the welding torch height axis driving unit 200 by comparing the initial pressing load initially set and the pressing load measured in the load cell during operation, and thereby, the welding arc length variation And the pressure change amount can be compensated.

That is, when the pressing load measured in the load cell becomes smaller than the initial pressing load during operation, the control unit determines that the distance between the welding torch 140 and the corrugated plate is distant and the welding torch height axis driving unit 200 moves the welding torch 140 and / The welding arc length and the pressing load can be controlled to be constant by lowering the pressing means 250. Conversely, if the pressing load measured by the load cell during operation is larger than the initial pressing load, the distance between the welding torch 140 and the corrugated plate The welding torch height axis driving unit 200 raises the welding torch 140 and the pressing means 250 so that the welding arc length and the pressing load can be controlled to be constant.

Thus, the pressing means including the load cell can automatically adjust the welding arc length during the welding operation and automatically minimize the welding gap between the corrugated plates, thereby improving the welding quality.

Meanwhile, the automatic welding apparatus 100 according to an embodiment of the present invention can be used for both the corrugated plate having the protruding corrugations and the corrugated plate having the corrugated corrugations shown in FIG.

Accordingly, the automatic welding apparatus 100 according to an embodiment of the present invention includes the clamp member 260 and the rail fixing unit 270 can do.

15 to 19 show a clamping member 260 and a rail fixing unit 270 that can fix the running rail 110 to the corrugated plate.

16 is a plan view of the clamp member 260. Fig. 17 is a front view of the clamp member 260, and Fig. 18 is a plan view of the clamp member 260. Fig. 260). 19 is a perspective view showing a state in which the rail fixing unit 270 is installed on the corrugated plate.

First, as shown in FIGS. 15 to 18, the clamp member 260 can fix the running rail 110 to protruding corrugations protruding from the upper portion of the corrugated plate.

In one embodiment, the clamp member 260 can be mounted at the intersection of the raised ridges formed in a lattice form.

To this end, in one embodiment, the clamping member 260 includes a pair of clamping blocks 261 which can be mounted firmly on the protruding corrugations by pressing both sides of the protruding corrugations, and between the pair of clamping blocks 261 And a pressing knob 264 for adjusting the interval of the pressing knob 264.

Here, grooves corresponding to the shapes of both sides of the protruding corrugations may be formed on the inside of the clamping block 261.

Generally, the membrane sheet 10 used as a barrier of an LNG hold can be formed with a large wrinkle 11 having a large height and a large width in the lateral direction or the longitudinal direction, Small wrinkles 12 may be formed.

Corresponding to the membrane sheet 10 of this type having lattice-like protruding pleats, in one embodiment, the clamping block 261 is provided with a large pleat groove 22 corresponding to the large pleats 11 as shown in Figs. 17 and 18, And a small crease groove 263 corresponding to the small crease 12 may be formed. Since the clamping block 261 is provided at the intersection of the large wrinkle 11 and the small wrinkle 12, the large wrinkle groove 262 and the small wrinkle groove 263 can be formed to cross each other in a cross shape.

The clamp member 260 may be mounted on the protruding corrugation and may be fastened to the upper end of the traveling rail 110 through a separate fastener (not shown).

Meanwhile, as shown in FIG. 19, the rail fixing unit 270 can secure the running rail 110 to a flat corrugated plate without depressed wrinkles or recessed wrinkles that are depressed downward.

To this end, in one embodiment, the rail fastening unit 270 may comprise a rail fastening block 271, a fastening portion 272, a plate pressing bar 273 and an adjustment knob 274.

The rail fixing block 271 is a member coupled to the running rail 110.

Also, the fastening portion 272 can fasten the rail fixing block 271 to the fixing anchor protruding to the upper portion of the corrugated plate. Here, the fixed anchor is a structure protruding from the secondary barrier to fix a heat insulation panel (not shown) of the primary barrier as shown in FIG.

In one embodiment, the fastening portion 272 may comprise, but is not limited to, a nut member for securely fastening the rail fastening block 271 to the stationary anchor, as shown in FIG.

In addition, the plate pressing bar 273 is provided in the rail fixing block 271 in parallel with the running rail 110, and can press the corrugated plate. The sheet material pressing bar 273 can press the corrugated sheet material to be welded to each other to minimize the gap of the overlap welding.

The adjustment knob 274 is provided to adjust the pressing force of the plate material pressing bar 273. The adjustment knob 274 is configured to adjust the pressing force of the plate pressing bar 273 to press the corrugated plate so as to flatten the folded corrugated plate at the welded portion and to suppress the excessive pressing force of the plate pressing bar 273 It is possible to provide a function of preventing the corrugated plate from being deformed.

20 shows an operation of welding an automatic welding apparatus 100 according to an embodiment of the present invention to a portion where the depressions 22 are formed.

20, the welding torch 140 is tilted by the welding header rotation axis driving part 170 and moves along the welding line W while being perpendicular to the welding surface of the corrugation, Can be performed.

At this time, the change amount of the inclination of the wrinkle can be detected by the first contact type displacement sensor 220 and the second contact type displacement sensor 230 described above.

In addition, the irregularity detection sensor 240 can sense the shape of the indentation corrugations 22, and the controller divides the indentation corrugations 22 into a plurality of sections according to the information detected by the irregularity detection sensor 240, As described above, welding conditions can be changed for each section.

Since the pressing means 250 is provided in the welding header 130, the plate 20 can be brought into close contact with the welding plate 20 arranged vertically to the welding surface in the same manner as the welding torch 140.

21 to 23 show a clamp fixing unit 280 included in the automatic welding apparatus 100 according to another embodiment of the present invention. 21 to 23, a structure in which the automatic welding apparatus 100 according to another embodiment of the present invention is mounted on the corrugated plate will be described.

22 is a perspective view of the clamp fixation unit 280, and FIG. 23 is a perspective view of the clamp fixation unit 280 (FIG. 23). FIG. 21 is a perspective view showing a state in which the clamp fixation unit 280 is installed on the depressed corrugated membrane sheet 20, Is a perspective view showing a state in which a running rail 110 is installed on a depressed corrugated membrane sheet 20.

21 to 23, the clamp fixing unit 280 is coupled to the membrane sheet 20 having the depression 22 formed therein, and the clamp member 260 is mounted on the upper portion of the membrane sheet 20 Can form a protruding wrinkle shape. Here, the clamp member 260 can be mounted on the membrane sheet 20 on which the concave corrugations 22 are formed via the clamp fixing unit 280.

That is, in the automatic welding apparatus 100 according to another embodiment of the present invention, when the protruding corrugated membrane sheet 10 is welded, as described above, the clamp member 260 is pressed against the protruding corrugation The clamping unit 280 may be attached to the depressed corrugated membrane sheet 20 when the depressed corrugated membrane sheet 20 is welded, The driving rail 110 can be fixed by attaching the clamp member 260 to the clamp fixing unit 280. [

The automatic welding apparatus 100 according to another embodiment of the present invention is different from the automatic welding apparatus 100 according to the embodiment of the present invention described above with reference to FIG. 19 in that the protruded corrugated membrane sheet 10 The traveling rail 110 and the clamp member 260 are separated from each other to use the traveling rail 110 to be used in the depressed pleated membrane sheet 20 and the separated traveling rail 110 is again attached to the rail fixing unit 270 The clamping member 260 coupled with the running rail 110 can be mounted directly on the clamp fixing unit 280 and the running rail 110 can be installed on the depressed corrugated membrane sheet 20 Therefore, it has an advantage that ease of operation and compatibility of components are improved.

To implement this functionality, in one embodiment, the clamp fixation unit 280 may include a fixed beam 284, a fastening portion 281, and a wrinkle intersection 285 to minimize the weld gap between the corrugated plates A pressing bar 283 for pressing the corrugated plate and a protrusion 286 for aligning the clamp fixing unit 280 with the corrugated plate.

The fixed beam 284 is a linearly elongated block shaped structure.

The fastening part 281 can fasten the fixing beam 284 to the fixing anchor 30 protruding to the upper part of the corrugated plate 20. [ In one embodiment, the fastening portion 281 may be integrally formed at both ends of the fixed beam 284 and may include a fastening hole through which the fastening anchor 30 can pass, and a fastening anchor 30 through the fastening nut 282. [0050]

The wrinkle intersection 285 is formed at the upper end of the fixed beam 284 and is formed in an intersection shape in which the large wrinkles 11 and the small wrinkles 12 of the protruded wrinkles, .

In this configuration, the fixed beam 284 can be fixed to the upper surface of the depressed corrugated membrane sheet 20 through the clamping portion 281, and the clamping member 260 is mounted on the corrugated portion 285 and fixed Can be fixed to the upper end of the beam 284 so that the running rail 110 can be fixed on the depressed corrugated membrane sheet 20.

The pressing bar 283 is a linear member coupled to the coupling part 281. When the coupling part 281 is fastened to the fixing anchor 30, the pressing bar 283 presses the surface of the membrane sheet 20 downward, The occurrence of lift-off and weld gap between the membrane sheets 20 to be welded can be minimized.

The protruding portion 286 may protrude from the lower end of the fixed beam 284 and may be inserted into the depressed wrinkle 22 formed in the depressed pleated membrane sheet 20. The protrusions 286 are formed in a shape corresponding to the depressed wrinkles 22 so that when the clamp fixing unit 280 is installed on the depressed wrinkled membrane sheet 20 as shown in Figure 23, So as to align the fixed beam 284 in a predetermined position.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

100: automatic welding device 110: running rail
112: Rack gear 120: Carriage
130: welding header 140: welding torch
150: driving axis driving unit 151: base frame
152: Running roller 153: Rail clamp
154: Tightening screw 155: Pinion gear
156: Driving drive motor 157: Reduction gear
158: Manual traveling clutch 159: Hinge shaft
160: welding head height shaft driving unit 161: ball screw
161a: screw shaft 161b: lift nut
162: elevating drive motor 163: power transmission belt
164: lifting guide rail 170: welding header rotating shaft driving part
171: lift frame 172: rotation drive motor
173: rotary gear 174: first link drive gear
175: second link drive gear 176: idle gear
177-1: first rotating bar 177-2: second rotating bar
178: first welding header rotating link 179: second welding header rotating link
180: track rail 181: link support block
190: welding head angle sensor 200: welding torch height axis driving unit
201: Torch height shaft block 202: Lift driving unit
203: torch lift rail 210: weld line tracing axis driver
211: Torch tracking axis block 212: Horizontal drive unit
213: torch horizontal rail 220: first contact displacement sensor
230: second contact type displacement sensor 240: unevenness detection sensor
250: pressing means 252: pressing roller
260: clamp member 261: clamping block
264: pressure knob 270: rail fixing unit
271: rail fixing block 272: fastening portion
273: plate pressing bar 274: adjusting knob
280: clamp fixing unit 281: fastening part
282: fastening nut 283: pressure bar
284: Fixed beam 285: Wrinkle intersection
286: protrusion

Claims (29)

A running rail fixed to an upper surface of the corrugated plate;
A carriage which moves along the longitudinal direction of the running rail and is movable along a weld line of the corrugated plate;
A welding header coupled to the carriage and having a welding torch;
A traveling axis driving unit provided on the carriage and moving the carriage along the traveling rail;
A welding header height shaft driving unit provided on the carriage and adjusting a height of the welding header;
A welding header rotating shaft driving unit provided in the carriage and adjusting a tilt of the welding head with respect to a traveling direction of the carriage;
A welding torch height axis driving unit provided in the welding header for adjusting an interval between the welding torch and the corrugated plate; And
A welding line tracking axis driving unit provided in the welding header and adjusting a welding line width direction position of the welding torch;
/ RTI >
And an unevenness detecting sensor provided on the carriage and detecting irregularities of the corrugated plate using light,
Further comprising a control unit for controlling the welding header height axis driving unit and the welding header rotation axis driving unit,
Wherein the controller controls the welding header height axis driving unit and the welding header rotation axis driving unit based on a value measured by the unevenness detecting sensor.
The method according to claim 1,
The traveling-axis driving unit includes:
A base frame provided at the bottom of the carriage;
A traveling roller provided on the base frame and movably mounting the base frame on the traveling rail;
A rail clamp for pressing the running roller to the running rail;
A pinion gear provided on the base frame and engaged with a rack gear provided along the longitudinal direction of the running rail; And
And a traveling drive motor for rotating the pinion gear.
3. The method of claim 2,
And the driving axis driving unit further includes a manual running clutch for moving and fixing the pinion gear in the width direction of the running rail.
The method according to claim 1,
The welding header height axis driving unit includes:
A ball screw having a screw shaft and a lift nut coupled to the weld header and moving up and down according to rotation of the screw shaft;
A lift motor connected to the screw shaft by a power transmission belt to rotate the screw shaft; And
And an elevating guide rail provided at both sides of the carriage and supporting the elevating operation of the welding headers.
The method according to claim 1,
The welding head rotating shaft driving unit includes:
A lifting frame connected to the welding header height axis driving part and movable up and down, the welding head being connected to one side;
A rotation drive motor provided on the other side of the lifting frame;
A rotating gear provided at one side of the lifting frame and rotated by the rotation driving motor;
A first link drive gear and a second link drive gear provided on one side of the lifting frame and symmetrically provided on both sides of the rotary gear below the rotary gear; And
And an idle gear provided to be engaged with both the rotary gear, the first link drive gear, and the second link drive gear and transmitting the rotational force of the rotary gear to the first link drive gear and the second link drive gear, Automatic welding device for sheet material.
6. The method of claim 5,
The welding head rotating shaft driving unit includes:
A first rotating bar whose lower end is connected to the first link driving gear in such a manner that rotational behavior thereof is coincident;
A second rotating bar whose lower end is connected to the second link driving gear in such a manner that rotational behavior thereof is matched;
A first welded header rotating link whose upper end is rotatably connected to the upper end of the first rotating bar and the second rotating bar and whose lower end is rotatably connected to the weld head;
And a second welded header rotating link rotatably connected between the upper and lower ends of the first rotating bar and the second rotating bar and having a lower end rotatably connected to the welding header,
Wherein the first welding header rotating link and the second welding header rotating link are vertically spaced apart and connected to the welding header.
The method according to claim 6,
The welding head rotating shaft driving unit includes:
A curved rail formed on one side of the lifting frame so as to be curved in an arc shape; And
And a link support block movable along the curved rail and in which the first rotating bar and the second rotating bar are rotatably coupled,
And the link support block slides on the curved rail in accordance with the rotation of the first and second rotary bars to support the first rotary bar and the second rotary bar.
The method according to claim 6,
Wherein the welding head is provided with a welding header angle sensor for measuring the inclination of the welding head.
9. The method of claim 8,
Further comprising a control unit for controlling the welding head rotational shaft driving unit,
Wherein the control unit controls the welding header rotation axis driving unit based on a measurement value of the welding head angle sensor.
The method according to claim 1,
The welding torch height axis driving unit includes:
A torch height axis block provided on the welding header so as to be movable up and down and connected to the welding torch;
An elevation driving unit for elevating the elevation shaft block; And
And a torch lift rail for maintaining the elevation locus of the torch height axis block.
11. The method of claim 10,
The weld line tracking axis driver includes:
A torch height axis block horizontally movable in a width direction of a weld line on the torch height axis block, the torch height axis block coupled with the welding torch;
A horizontal driving unit for horizontally moving the torch tracking axis block;
And a torch horizontal rail for maintaining a movement locus of the torch tracking axis block.
The method according to claim 1,
A first contact type displacement sensor provided on the welding header and contacting the surface of the corrugated plate to sense the shape of the corrugated plate; And
And a second contact type displacement sensor provided on the welding header and contacting the surface of the corrugated plate to sense the shape of the corrugated plate.
13. The method of claim 12,
Wherein the first contact type displacement sensor is disposed behind the second contact type displacement sensor with respect to the running direction of the carriage.
14. The method of claim 13,
The first contact type displacement sensor senses the height of the corrugated plate,
And the second contact type displacement sensor is configured to detect the inclination of the corrugated plate.
14. The method of claim 13,
Further comprising a control unit for controlling the welding header height axis driving unit and the welding header rotation axis driving unit,
Wherein the control unit controls the welding head height axis driving unit and the welding header rotation axis driving unit based on values sensed by the first contact type displacement sensor and the second contact type displacement sensor.
delete delete The method according to claim 1,
And a pressing means provided in the welding head so as to match the behavior of the welding torch and pressing the corrugated plate downward,
Wherein the pressing means is configured to be capable of adjusting the pressing force.
19. The method of claim 18,
Wherein the pressing means includes a pressing roller for pressing the corrugated plate at the lower end thereof,
Wherein the pressing roller is elastically supported by a body of the pressing means by a spring capable of adjusting the elastic restoring force.
19. The method of claim 18,
Wherein the pressing means includes a pressing roller for pressing the corrugated plate at the lower end thereof,
Wherein the pressing means is provided with a load cell for measuring a pressing load of the pressing roller.
21. The method of claim 20,
And a control unit for controlling the welding torch height axis driving unit,
Wherein the control unit controls the welding torch height axis driving unit so that the welding arc length is constant according to the shape of the corrugated plate on the basis of the measured value of the load cell.
The method according to claim 1,
And a clamping member for fixing the running rail to protruding wrinkles protruding from the upper portion of the corrugated plate.
The method according to claim 1,
Further comprising a rail fixing unit for fixing the running rail to a flat wrinkle plate formed with depressed wrinkles which are recessed downward.
24. The method of claim 23,
The rail fixing unit
A rail fixing block coupled to the running rail;
A fastening portion for fastening the rail fixing block to a fixing anchor protruded to the upper portion of the corrugated plate; And
And a plate pressing bar provided parallel to the running rail on the rail fixing block and pressing the corrugated plate.
25. The method of claim 24,
Wherein the rail fixing unit further comprises an adjusting knob for adjusting the pressing force of the plate pressing bar.
23. The method of claim 22,
And a clamp fixing unit coupled to the corrugated plate having the recessed corrugated wedge that is recessed downward to form protruding corrugations on the corrugated plate,
Wherein the clamping member is mountable on a corrugated plate formed with a concave corrugation via the clamp fixing unit.
27. The method of claim 26,
The clamp fixing unit includes:
Fixed beam;
A fastening part for fastening the fixed beam to a fixed anchor protruding to the upper part of the corrugated plate; And
And a wrinkle intersection formed on the fixed beam and on which the clamp member is mounted.
28. The method of claim 27,
Wherein the clamp fixing unit includes a plate pressing bar mounted on the clamping portion to press the corrugated plate.
28. The method of claim 27,
Wherein the clamp fixing unit further comprises a protrusion protruded from a lower end of the fixed beam and inserted into a recess formed in a corrugated plate.

Images