WO2021162192A1

WO2021162192A1 - Method for manufacturing gratings having various standards by using one press mold, and grating manufactured by manufacturing method

Info

Publication number: WO2021162192A1
Application number: PCT/KR2020/011843
Authority: WO
Inventors: 전나래
Original assignee: 전나래
Priority date: 2020-02-12
Filing date: 2020-09-03
Publication date: 2021-08-19
Also published as: KR20210102569A; KR102349396B1

Abstract

A grating manufacturing method according to the present invention makes grating components have uniform upside widths (w), adjusts the height of a lateral surface (supporting part) according to the magnitude of an upper load that must be supported by a grating, adjusts the width (p) of a metal plate according to the height of the lateral surface so that same correspond, adjusts the length of the grating components in correspondence to the width (s) of the grating, and can adjust the number of coupled grating components and the length of a connecting bar in correspondence to the length (L) of the grating, and thus can manufacture gratings having various standards by using one press mold. Furthermore, the grating according to the present invention enables a plating solution to properly penetrate between the grating components during a plating operation and has excellent drainage performance.

Description

A method for manufacturing gratings of various specifications with one press mold, and a grating manufactured by this manufacturing method

The present invention relates to a method for manufacturing a grating, and more specifically, to make the width (w) of the upper surface of the grating component constant, increase the height (h) of the side when the upper load that the grating must support is large, and increase the height (h) of the side when the upper load is small Reduce the height (h) of the side, but adjust the width (p) of the metal plate according to the height (h) of the side, adjust the length of the grating component in response to the width (s) of the grating, and adjust the length of the grating (L ), it is possible to adjust the combined number of grating components and the length of the connecting bar, and accordingly, it is about a grating manufacturing method that can manufacture gratings of various specifications with one press mold.

In addition, the present invention also relates to a grating made by such a manufacturing method.

This application is the Republic of Korea Patent Application No. 10-2020-0016712 (Title of the invention: a method of manufacturing gratings of various specifications with one press mold, and a grating manufactured by this manufacturing method. filed on February 12, 2020) As an application claiming priority on the basis of the application, all contents included in the specification and drawings of Korean Patent Application No. 10-2020-0016712 are included in this specification.

In general, the grating is widely used as a cover of rainwater collection and drainage channels installed in roads, residential complexes, subways, and the like.

As shown in FIG. 1 , the grating 5 includes an end bar 2 having a rectangular inner space, a plurality of bearing bars 3 installed inside the end bar 2 , and a cross bar 4 . include

The bearing bar 3 supports most of the load applied to the grating 5 , and a plurality of bearing bars 3 are arranged in parallel with each other at equal intervals. Both ends of the bearing bar (3) are joined to the end bar (2) by welding.

The cross bar 4 is installed on the upper end (upper surface of the grating) of the bearing bar 3 so as to be perpendicular to the bearing bar 3 , and is coupled to the bearing bar 3 and the end bar 2 by welding. The cross bar 4 serves to maintain the spacing between the bearing bars 3 .

The grating 5 having the above structure has a problem in that it takes a lot of work time and cost to manufacture the end bar 2 , the bearing bar 3 , and the cross bar 4 , respectively, and to weld them. In addition, the load-bearing load of the grating can be classified into a vertical load and a horizontal load, and there is a problem that the bearing bar is damaged due to the horizontal load generated by the sudden stop and sudden start of the vehicle, so that the grating replacement rate is very high.

In addition, since the grating 5 is a structure in which the bearing bar 3 and the cross bar 4 are installed inside the rectangular space formed by the end bar 2, the shape and/or width cannot be easily changed, and the same There is a problem in that the width and shape of the grating must be repeatedly installed. If, in order to change the shape and/or the width of the grating 5 , the end bar 2 , the bearing bar 3 , and the cross bar 4 must be newly manufactured, which takes a lot of time and money.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a grating manufacturing method capable of manufacturing gratings of various specifications with a single press mold. Specifically, the present invention makes the upper width (w) of the grating component constant, increases the height (h) of the side when the upper load that the grating must support is large, and reduces the height (h) of the side when the upper load is small Corresponding by adjusting the width (p) of the metal plate according to the height (h) of the An object of the present invention is to provide a method for manufacturing a grating capable of adjusting the number and length of the connecting bar.

Another object of the present invention is to provide a method for manufacturing a grating that allows a plating solution to penetrate well between grating components during a plating operation and has excellent drainage ability.

Another object of the present invention is to provide a grating made by the above manufacturing method.

In order to achieve the above object, the grating manufacturing method according to a preferred embodiment of the present invention manufactures the grating component 110 by processing the metal plate 1 with a press mold, and combines a plurality of grating components 110 in the horizontal direction. to manufacture a grating.

Specifically, the grating manufacturing method is, (a) slitted to a predetermined width (p) in consideration of the width (w) of the upper surface of the grating component 110 to be manufactured and the height (h) of the side surface (112, support) Preparing a metal plate (1); (b) punching the slitted metal plate 1 with a punch 312 to form a temporary drain hole 11; (c) forming the drain hole 111 by burring the provisional drain hole 11; And, (d) after step (c) or at the same time as step (c) by bending both sides of the metal plate at a right angle to form the side surface (112, support portion); includes.

The manufacturing method makes the upper surface width w of the grating component 110 constant, but increases the height (h) of the side surface 112 (support part) when the upper load that the grating must support is large, and increases the height (h) of the side surface ( Since the height (h) of the 112 (support portion) is reduced, the width (p) of the metal plate (1) is adjusted according to the height (h) of the side surface (112) to respond. Then, the length of the grating component 110 is adjusted in response to the width (s) of the grating, and the number of couplings of the grating component 110 and the length of the connection bar 140 are adjusted in response to the length (L) of the grating. . Accordingly, the manufacturing method can manufacture gratings of various specifications with one press mold.

In step (b), in consideration of the location of the drain hole 111, the punched portion 310 of the portion to form the provisional drain hole 11 has a spacer ( 314 is inserted so that punching is performed, and the spacer 314 is removed in the punched part 310 of a portion where the provisional drainage hole 11 is not to be formed so that punching is not performed.

The burring and bending operations of steps (c) and (d) may be performed at the same time. In this case, burring and bending operations may be performed after the punched metal plate 1 is turned over and placed on the lower mold. At this time, the press mold is installed in the rectangular groove 320 of the lower mold, the upper and lower moving plate 321 having a width corresponding to the upper surface width (w); a reamer 323 installed on the vertical moving plate 321; a spring 322 installed under the vertical moving plate 321 to provide an elastic force to the vertical moving plate 321; And, while reciprocating up and down with respect to the vertical moving plate 321, bending both sides of the metal plate 1 at a right angle, a pressing block 326 having a groove 327 into which the reamer 323 is inserted is formed on the lower surface; may include.

When the pressing block 326 descends into the rectangular groove 320 and presses the metal plate 1 against the reamer 323, the vertical moving plate 321 is moved downward while overcoming the elastic force of the spring 322 and the reamer ( As the 323 is inserted into the groove 327 , the provisional drain hole 11 is expanded and formed into the drain hole 111 , and at the same time, both sides of the metal plate 1 may be bent at right angles.

A stopper 301 is installed in the lower mold, and a cutting member is installed in the upper mold, and the cutting member cuts the metal plate 1 according to the length of the grating component.

Protrusions are formed on both sides of the cutting member, and an inlet groove 114 is formed at the tip of the metal plate 1 by the protrusions. A stopper 301 is inserted into the inlet groove 114 to fix the tip of the metal plate 1 . And, the inlet groove 114 helps the bending of the step (d).

The bending in step (d) may be performed by the pressing part 346 and the groove 340 . Specifically, a groove 345 is formed in the upper die, and pressing parts 346 are provided on both sides of the groove 345 , and a vertical movement member 347 is installed in the groove 345 , and a vertical movement member 347 is provided. A spring 348 is installed on the top, a cylindrical block 349 is installed on the lower surface of the vertical movement member 347, grooves 340 are formed on both sides of the lower mold, and the vertical movement plate (340) in this groove (340) 341 and the spring 342 may be respectively installed. When the upper mold is lowered, the cylindrical block 349 is inserted into the drain hole 111 , and then the pressing parts 346 on both sides are inserted into the groove 340 , and the vertical moving plate 341 by the pressing force of the pressing part 346 . ) is moved downward while overcoming the elastic force of the spring 342, and both sides of the metal plate 1 are bent at right angles. And, when the upper mold rises after the bending is completed, the vertical moving member 347 is lowered to its original position by the restoring force of the spring 345 and the vertical moving plate 341 is raised by the restoring force of the spring 342 while the metal plate ( 1) is discharged upwards.

In the continuous automatic production method, in step (b), the metal plate 1 on which the temporary drain hole 11 is formed moves by a predetermined distance and then stops, and then for the metal plate 1 on which the temporary drain hole 11 is formed. At the same time as the burring process of step (c) is performed, the punching of step (b) may be performed for the newly entered metal sheet 1, and the tip of the newly entered metal sheet may be cut.

The manufacturing method, (e) after step (d), after arranging the manufactured grating component 110 horizontally, combining both ends of the grating component 110 with the connecting bar 140; may include

In the step (e), it is preferable that the grating components 110 be spaced apart from each other at a predetermined interval. And, the manufacturing method, (f) the step of plating the grating component 110 and the connecting bar 140 combined in the step (e); may include.

The spaced portion serves to allow the plating solution to penetrate between the grating components 110 during the plating in step (f) and to drain water.

Another aspect of the present invention, the grating 100, at least two grating components 110; and a connection bar 140 for coupling the grating components 110 to each other in a state in which the neighboring grating components 110 are horizontally arranged to be spaced apart by a predetermined interval.

The grating component 110, the body portion 113 of the square plate shape; and a support portion 112 vertically extending downward from two opposite sides of the body portion 113 .

Both ends of the support part 112 may be coupled to the connection bar 140 by welding. In addition, the spaced part between the adjacent grating components 110 is a part through which the plating solution penetrates during plating, and a part through which water is drained when the product is installed in the field.

The present invention has the following effects.

First, gratings of various specifications can be manufactured with one press mold. Specifically, the present invention makes the upper width (w) of the grating component constant, increases the height (h) of the side when the upper load that the grating must support is large, and reduces the height (h) of the side when the upper load is small Corresponding by adjusting the width (p) of the metal plate according to the height (h) of the Since the number and length of connecting bars can be adjusted, gratings of various sizes can be manufactured with one press mold.

Second, during the plating operation, the plating solution can penetrate well between the grating components and a grating with excellent drainage ability can be manufactured.

1 is a perspective view showing a grating according to the prior art.

Figure 2 is an exploded perspective view showing a grating according to a preferred embodiment of the present invention.

Fig. 3 is a plan view showing the grating of Fig. 2;

4 is a cross-sectional view taken along line A-A' of FIG. 3;

5 is a plan view showing that punching and cutting are made on a metal plate in a single shot manual production method according to the present invention.

Figure 6 (a) is a cross-sectional view showing the punching part when punching is made, Figure 6 (b) is a cross-sectional view showing the punching part when punching is not made.

7 is a plan view showing that punching and cutting are made on a metal plate in a continuous automatic production method.

8 is a plan view showing that burring and bending are simultaneously performed on a metal sheet.

Figure 9 (a) (b) is a cross-sectional view showing that the burring and bending is made to the metal sheet at the same time.

10 is a cross-sectional view showing that burring is made for a metal plate.

11 is a cross-sectional view showing that bending is performed on a metal sheet.

12 is a plan view showing that grating components are produced in a continuous automatic production method using one press mold, but burring and bending are simultaneously performed after the first punching.

13 (a) is a plan view showing that grating components are produced in a continuous automatic production method using one press mold, but the first punched metal plate is advanced to the right and burring is performed, and FIG. 13 (b) is burring A plan view showing the bending of a processed metal sheet.

14(a)(b)(c) are a top view, a B'-B' cross-section, and a B-B cross-section showing a grating component with a deformed drain.

15 is a plan view showing that the drain hole of FIG. 14 is formed in a metal plate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. Accordingly, since the embodiments described in the present specification and the configurations shown in the drawings are merely embodiments of the present invention and do not represent all the technical spirit of the present invention, various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and variations.

그레이팅의 구조structure of the grating

FIG. 2 is an exploded perspective view showing a grating according to a preferred embodiment of the present invention, FIG. 3 is a plan view showing the grating, and FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 3 .

As shown in the drawing, the grating 100 includes a plurality of grating components 110 and a connecting bar 140 coupling the grating components 110 to each other. The grating component 110 and the connecting bar 140 may be made of any one material selected from the group consisting of steel, stainless steel, aluminum alloy, synthetic resin, plastic, FRP, and the like. In addition, the material of the grating component 110 and the connecting bar 140 may be the same, but may be different from each other.

The grating component 110 is manufactured by punching, burring, and bending a flat metal plate 1, two rim portions facing each other of the metal plate 1 are vertically bent to form the support part 112, and the support part 112 ), the inner rectangular portion becomes the body portion 113 . In addition, a plurality of drain holes 111 , anti-slip protrusions 116 , and bolt holes 117 are formed in the body portion 113 .

The body portion 113 has a substantially rectangular shape, preferably a rectangular shape. The body portion 113 preferably extends slightly more outwardly in the longitudinal direction of the grating component 110 than the support portion 112, so that both ends of the support portion 112 are located below the body portion 113 and , coupling of both ends of the support part 112 and the connecting bar 140 (eg, spot welding, etc.) is also made under the body part 113 . This structure is advantageous because the coupling of the support portion 112 and the connecting bar 140 can be protected by the body portion 113 .

A plurality of drain holes 111 and an anti-skid protrusion 116 may be formed in the body portion 113 . The drain hole 111 is formed to penetrate the main body 113, and after punching a provisional drain hole (11 in FIG. 5) in the metal plate 1 by punching, the provisional drain hole 11 is expanded (burring process) can be formed. Although a circular drain hole 111 is shown in the drawing, drain holes 111 of various shapes may be formed within the limit capable of smoothly discharging water (such as rainwater). A flange portion 111b is formed below the circumference of the drain hole 111 . The flange portion 111b serves to increase the load bearing capacity of the body portion 113 . A stopper for preventing odor (not shown in the drawing) or a stopper for preventing slipping (not shown in the drawing) may be installed in the drain hole 111 .

On the other hand, the non-slip protrusion 116 is a portion formed to protrude upward from the body portion 113 . The non-slip protrusion 116 may be formed by pressing the metal plate 1 with a press mold, and may be punched by punching the center of the non-slip protrusion 116 . The perforations not only serve as drainage, but also increase friction.

Bolt holes 117 may be formed at both ends of the main body 113 in place of the non-slip protrusion 116 . The bolt hole 117 is formed by punching the metal plate 1 , and an anti-theft bolt (not shown in the drawing) may be installed in the bolt hole 117 . The anti-theft bolt fixes the grating (or grating component) to the frame (not shown in the drawing) installed under the grating.

The support part 112 is preferably formed on the long side of the body part 113 . This is because, after arranging the plurality of grating components 110 in the horizontal direction, if the connecting bar 140 is installed on the short side, the grating 100 having the width s of the long side can be made.

And, an inlet groove 114 is formed between the upper end of both ends of the support part 112 and the body part 113 . The inlet groove 114 helps the support 112 to be bent well.

According to the present invention, if the upper surface width w of the grating component 110 is constant and the upper load that the grating 100 has to support is large, the height h of the side surface 112 is increased, and if the upper load is small, the side surface Reduce the height (h) of the 112, but respond by adjusting the width (p of FIG. 5) of the metal plate 1 according to the height (h) of the side 112, and the width (S) of the grating 100 Correspondingly, the length of the grating component 110 is adjusted, and the number of couplings of the grating component 110 and the length of the connection bar 140 can be adjusted in response to the length (L) of the grating 100 , and accordingly, various specifications of the grating 100 can be manufactured with one press mold.

The connecting bar 140 is a strip-shaped bar formed long in the longitudinal direction, and is respectively coupled to both ends of the grating component 110 to couple two or more grating components 110 to each other in the transverse direction. The connecting bar 140 preferably has the same length as the length L of the grating 100 to be made.

It is preferable that the neighboring grating components 110 are coupled to the connecting bar 140 so as to be spaced apart from each other by a predetermined interval. The spaced portion allows the plating solution to penetrate between the grating components 110 during the plating operation, and serves as drainage after field installation. On the other hand, when the grating components 110 are coupled to the connection bar 140 so that they are in close contact with each other, the plating solution does not penetrate between the grating components 110 during plating, thereby causing corrosion.

The grating 100 does not need the bearing bar 3 and the cross bar 4 (cross bar installed on the upper surface of the grating) of the existing grating 5 because the support 112 supports the load. In the past, it took a lot of time and money to manufacture and combine (weld) the bearing bar 3 and the cross bar 4, but the grating 100 according to the present invention is the bearing bar 3 and the cross bar 4 Since there is no need, the unit cost and manufacturing time can be reduced.

그레이팅의 제조 방법How to make the grating

(1) Punching and cutting of single shot manual production method

The single shot manual production method is a production method in which the metal sheet 1 is advanced by a certain length in the direction of the arrow, stopped, and then the upper die is moved downward to process the metal sheet 1, and one metal sheet 1 at a time ) are processed only.

The metal plate 1 is a metal plate (for example, an iron plate) slitted to a certain width p, and is supplied in the direction of the arrow while being unwound after being wound in a circle on a winder (not shown in the drawing). The metal plate 1 repeats movement and stop in conjunction with the up-and-down reciprocating motion of the press mold.

The width p of the metal plate 1 may be determined according to the upper surface width w of the grating component 100 to be manufactured and the height h of the side surface 112 . Specifically, in the present invention, the width w of the upper surface of the grating component 110 is constant, but if the upper load that the grating 100 must support is large, the height h of the side 112 increases and the width p increases accordingly. , if the upper load is small, the side 112 height (h) is small, and accordingly the width (p) is also small.

The length (s) of the grating component 110 is determined by the width (s) of the grating 100 to be manufactured. Specifically, in FIG. 5, section t1 is a part for manufacturing the grating component 110 having a length s1, and a circle inside section t1 is a part where punching (or processing) is made. And, the t2 section is a part for manufacturing the grating component 110 having a length s2, the circle inside the t2 section is a part where punching (or processing) is made, and the t3 section is a grating component 110 having a length s1. The part that is not machined during manufacturing.

That is, when manufacturing the grating component 110 having a length s1, only the circular part inside the t1 section is punched (or processed), and when manufacturing the grating component 110 having s2, the circular part inside the t2 section is punched ( or processed).

When manufacturing the grating component 110 having a length s1, the circular portion of the section t3 is not processed. For this purpose, the press mold has a punching part 310 as shown in FIGS.

Figure 6 (a) shows the punched portion of the punched portion. The punch 312 is installed in the inner space of the punching unit 310 and receives an upward elastic force by the spring 316 . A spacer 314 is inserted between the ceiling of the punching unit 310 and the punch 312 , and thus, when the upper die is at the bottom dead center, the metal plate 1 is punched to form a provisional drain 11 .

Meanwhile, FIG. 6(b) shows the punching part 310 of the part where punching is not performed. Since the spacer 314 is removed, punching is not performed even when the upper die is at the bottom dead center. As such, in the present invention, by removing only the spacer 314 while leaving the punch 312 as it is, whether or not punching can be adjusted and the length (s) of the grating component 110 can be adjusted.

The cutting of the metal plate 1 is made simultaneously with the punching. Cutting is made by a cutting member installed on the upper die. Protrusions are formed on both sides of the cutting member, and an inlet groove 114 is formed at the tip of the metal plate by the protrusions. And, the stopper 301 is installed to protrude from the lower mold.

The inlet groove 114 determines the position of the metal plate 1 together with the stopper 301 . That is, the metal plate 1 is disposed on the lower mold so that the stopper 301 is inserted into the inlet groove 114 . In addition, the inlet groove 114 helps the side bending of the grating component 110 well.

(2) Punching and cutting of continuous automatic production method

7 is a plan view showing that punching and cutting are performed in a continuous automatic production method according to the present invention. Among the reference numerals of FIG. 7 , the same reference numerals as those of FIGS. 1 to 6 indicate the same components.

The continuous automatic production method repeats stopping after advancing the metal plate 1 by a certain length in the direction of the arrow, but is a production method in which punching and cutting are performed when the metal plate 1 is in a stopped state. 1) is processed.

In FIG. 9 , a section t1 is a part for manufacturing the grating component 110 having a length s1, and a circle inside the section t1 is a part where punching (or processing) is made. And, the section t2 is a part for manufacturing the grating component 110 having a length s2, and the circle inside the section t2 is a part where punching (or processing) is made. That is, when manufacturing the grating component 110 having a length s1, punching (or processing) is made only for the circular part inside the t1 section, and the circular part inside the t3 section is not machined, and the grating component 110 having a length s2. When manufacturing , the circle part inside the t2 section is punched (or processed).

At this time, when manufacturing the grating component 110 having a length s1, the punch portion 310 of the punching (or processing) portion is the spacer 314 is the ceiling of the punch portion 310 and the punch 312 It is inserted therebetween (FIG. 6(a)), and the punch part 310 of the part where punching is not made is in a state in which the spacer 314 is removed (FIG. 6(b)).

After the punched metal sheet is moved to the right, it is cut in units of a predetermined length (s1 or s2) by a cutting member.

(3) When burring and bending are performed at the same time

The metal plate 1 after punching and cutting is completed is moved to the 'burring and bending process' by a robot, a transfer device, or a worker. Burring is a process of forming the drain hole 111 by expanding the punched temporary drain hole 11, and the bending process is a process of bending both sides of the metal plate 1 at a right angle to make the side surface 112 (support part). 8 to 9, in the 'burring and bending process', burring and bending are performed simultaneously.

8 is a plan view showing that burring and bending are simultaneously made to the metal plate 1, and FIGS. 9 (a) and (b) are cross-sectional views showing that burring and bending are made to the metal plate 1 at the same time.

As shown in the figure, a rectangular groove 320 is formed in the lower mold, and a vertical movement plate 321 is installed in the rectangular groove 320 to move up and down, and a spring ( 322) is installed to provide elasticity. A reamer 323 for expanding the provisional drain hole 11 is installed on the upper surface of the vertical moving plate 321 .

And, the press block 326 is installed on the upper die. A groove 327 corresponding to the reamer 323 is formed on the lower surface of the pressing block 326 .

The width of the rectangular groove 320 is substantially equal to the width w of the top surface of the grating component 110 and the length of the rectangular groove 320 (the length of the groove 320 in the direction perpendicular to the ground plane) is manufactured It has a length that is slightly longer than the maximum length (s) of the grating component 110 to be desired.

As shown in Fig. 9 (a), the punched metal sheet 1 is placed on the lower mold in an inverted state. Then, as shown in FIG. 9(b), when the upper mold is lowered, the pressing block 326 is inserted into the rectangular groove 320 while bending both sides of the metal plate 1 at right angles and the reamer 323 is inserted into the groove ( 327), the temporary drain hole 11 is expanded to form the drain hole 111. Both sides bent at right angles become the support portion 112 (side surface).

Then, when the upper mold rises upward, the vertical moving plate 321 rises upward by the restoring force of the spring 322 , and thus the metal plate 1 is discharged upward.

(4) When burring and bending are performed separately

After the punching and cutting is completed, the metal sheet 1 is transferred to and processed by the 'burring process' and then transferred to and processed by the 'bending process'. At this time, the transfer may be made by a robot or a transfer (transfer device) or an operator.

10 is a cross-sectional view showing that the burring process is made for the metal plate (1). After the punched metal plate 1 is disposed on the lower mold, when the upper mold is lowered, the reamer 332 is inserted into the groove 330 to expand the provisional drain hole 11 to form a drain hole 111 .

11 is a cross-sectional view showing that the bending process is made with respect to the metal plate (1).

A groove 345 is formed in the upper die, and pressing parts 346 are provided on both sides. A vertical moving member 347 is installed in the groove 345 , a spring 348 is installed on the vertical moving member 347 , and a cylindrical block 349 is installed on a lower surface of the vertical moving member 347 .

In addition, grooves 340 are formed on both sides of the lower mold, and a vertical moving plate 341 and a spring 342 are installed in the grooves 340 , respectively.

When the upper mold is lowered, the cylindrical block 349 is inserted into the drain hole 111 , and then the pressing parts 346 on both sides are inserted into the groove 340 , and the vertical moving plate 341 by the pressing force of the pressing part 346 . ) moves downward while overcoming the elastic force of the spring 342 . At this time, both sides of the metal plate 1 are bent at right angles.

When the upper mold rises after the bending is completed, the vertical moving member 347 descends to its original position by the restoring force of the spring 345 and the vertical moving plate 341 rises by the restoring force of the spring 342, while the metal plate (1) is discharged upwards.

(5) Interlocking automatic production method (when punching and 'burring and bending' are performed at the same time)

12 is a plan view showing that grating components are produced in a continuous automatic production method using one press mold, but burring and bending are simultaneously performed after punching. In FIG. 12 , the left side shows a lower mold in which punching is performed, and the right shows a lower mold in which burring and bending are performed simultaneously.

The left and right metal plates 1 are processed by one press die. That is, as one upper die ascends and descends, primary punching is performed on the left side, and burring and bending are simultaneously performed on the right side. The punched metal sheet 1 on the left may be transferred to the right by a robot or a transfer (transfer device) (not shown in the drawing) or an operator.

On the other hand, although the above processing may be performed by one press mold, the left and right sides may be respectively processed by two press molds, which will be apparent to those skilled in the art with reference to the present specification.

The 'burring and bending' may be performed in the same manner as in FIG. 9(a)(b).

(6) Interlocking automatic production method (when burring and cutting are performed after punching, followed by bending)

Figure 13 (a) shows that the grating component 110 is produced in a continuous automatic production method using one press mold, but the metal plate 1 with the provisional drainage hole 11 formed by punching advances to the right, burring and cutting 13 (b) is a plan view showing that the burring-processed metal plate 1 is bent.

In Figure 13 (a), section t1 is a part for manufacturing the grating component 110 having a length s1, section t2 is a part for manufacturing the grating component 110 having a length s2, section t3 has a length s1 It is a part that is not machined when manufacturing the grating component 110 having. As such, the present invention can manufacture the grating component 110 of several lengths with one press mold.

When the metal plate 1 is transferred in the direction of the arrow, punching is performed to form the temporary drain hole 11 . Next, if the punched metal plate 1 is further advanced in the direction of the arrow and then stops, the tip of the newly entered metal plate 1 is cut by the cutting member, but already punched in the metal plate 1 (right side of the cutting member) For the burring process is made, and punching is made for the newly entered metal plate (1, the left side of the cutting member). That is, cutting, punching, and burring are performed simultaneously. The burring process may be performed in the same manner as in FIG. 10 .

13 (b) shows that the burring-processed metal plate is bent. The bending process may be performed in the same manner as in FIG. 11 .

배수구의 변형예Variant of drain hole

14(a)(b)(c) are a plan view, a B'-B' cross-sectional view and a BB cross-sectional view, respectively, showing the grating component 110 having a deformed drain hole, and FIG. 15 is a plan view showing the metal plate having the drain hole formed therein. am.

The grating component 110 includes a groove 113a and a through hole 111d formed in the main surface of the drain hole 111 . The groove 113a is formed lower than the circumference 111c of the drain hole 111, and the groove 113a and the circumference 111c of the drain hole 111 increase frictional force. The perimeter 111c of the drain hole 111 is formed upward to increase the load bearing capacity. Then, the water introduced into the groove 113a is discharged downward through the through hole 111d.

Claims

In the method of manufacturing a grating by processing the metal plate (1) with a press mold to manufacture a grating component (110) and combining a plurality of grating components (110) in a horizontal direction,

(a) preparing a metal plate 1 slitted to a predetermined width p in consideration of the width (w) of the upper surface and the height (h) of the side surface 112 of the grating component 110 to be manufactured;

(b) punching the slitted metal plate 1 with a punch 312 to form a temporary drain hole 11;

(c) forming the drain hole 111 by burring the provisional drain hole 11; and,

(d) forming the side surface 112 by bending both sides of the metal plate at a right angle after step (c) or at the same time as step (c);

The top width w of the grating component 110 is constant, and if the upper load that the grating must support is large, the height (h) of the side surface 112 is increased, and if the upper load is small, the height (h) of the side surface 112 to respond by adjusting the width (p) of the metal plate (1) according to the height (h) of the side surface (112), and by adjusting the length of the grating component (110) in response to the width (s) of the grating, the grating A method of manufacturing a grating, characterized in that by adjusting the combined number of the grating components 110 and the length of the connecting bar 140 in response to the length (L) of the grating, and thereby manufacturing gratings of various specifications with one press mold.
According to claim 1,

The punch 312 is installed in the punching part 310 of the upper mold,

In step (b), in consideration of the location of the drain hole 111, the punched portion 310 of the portion to form the provisional drain hole 11 has a spacer ( 314) is inserted so that punching is performed, and the spacer 314 is removed in the punched part 310 of the part where the provisional drainage hole 11 is not to be formed so that punching is not performed.
3. The method of claim 2,

The burring and bending operations of steps (c) and (d) are performed at the same time, but the punched metal plate 1 is turned over and placed on the lower mold,

press mold,

a vertical moving plate 321 installed in a rectangular groove 320 of the lower mold and having a width corresponding to the width w of the upper surface;

a reamer 323 installed on the vertical moving plate 321;

a spring 322 installed under the vertical moving plate 321 to provide an elastic force to the vertical moving plate 321; and,

A pressing block 326 having a groove 327 into which the reamer 323 is inserted is formed on the lower surface by bending both sides of the metal plate 1 at a right angle while reciprocating up and down with respect to the vertical moving plate 321; includes; do,

When the pressing block 326 descends into the rectangular groove 320 and presses the metal plate 1 against the reamer 323, the vertical moving plate 321 is moved downward while overcoming the elastic force of the spring 322 and the reamer ( 323) is inserted into the groove 327, the temporary drain hole 11 is expanded and formed into the drain hole 111, and at the same time both sides of the metal plate (1) are bent at right angles.
3. The method of claim 2,

A stopper 301 is installed in the lower mold, and a cutting member is installed in the upper mold,

The cutting member cuts the metal plate 1 corresponding to the length of the grating component,

Protrusions are formed on both sides of the cutting member, and an inlet groove 114 is formed at the tip of the metal plate 1 by the protrusions,

A stopper 301 is inserted into the inlet groove 114 to fix the tip of the metal plate 1,

The inlet groove 114 is a grating manufacturing method, characterized in that helping the bending of the step (d).
3. The method of claim 2,

The metal plate 1 on which the provisional drain hole 11 is formed in step (b) moves by a predetermined distance and then stops, and then the burring of step (c) for the metal plate 1 on which the temporary drain hole 11 is formed. A method of manufacturing a grating, characterized in that the punching of step (b) is made for the newly entered metal plate (1) at the same time as the processing is made, and the tip of the newly entered metal plate is cut.
According to claim 1,

A groove 345 is formed in the upper die, and pressing parts 346 are provided on both sides of the groove 345 , and a vertical movement member 347 is installed in the groove 345 , and a spring is provided on the vertical movement member 347 . 348 is installed, a cylindrical block 349 is installed on the lower surface of the vertical moving member 347,

Grooves 340 are formed on both sides of the lower mold, and a vertical moving plate 341 and a spring 342 are installed in this groove 340, respectively,

When the upper mold is lowered, the cylindrical block 349 is inserted into the drain hole 111 , and then the pressing parts 346 on both sides are inserted into the groove 340 , and the vertical moving plate 341 by the pressing force of the pressing part 346 . ) is moved downward while overcoming the elastic force of the spring 342, and both sides of the metal plate 1 are bent at right angles,

When the upper mold rises after the bending is completed, the vertical moving member 347 is lowered to its original position by the restoring force of the spring 345 and the vertical moving plate 341 is raised by the restoring force of the spring 342 while the metal plate material (1) A method of manufacturing a grating, characterized in that it is discharged with scissors.
7. The method according to any one of claims 1 to 6,

The manufacturing method is

(e) after step (d), arranging the manufactured grating component 110 horizontally and then coupling both ends of the grating component 110 with the connecting bar 140; characterized in that it comprises a Grating manufacturing method.
8. The method of claim 7,

In step (e), between the grating components 110 are spaced apart at a predetermined interval,

The manufacturing method is

(f) plating the grating component 110 and the connecting bar 140 combined in step (e);

The spaced part is a grating manufacturing method, characterized in that during the plating in step (f), the plating solution to penetrate between the grating components (110) and to serve as drainage.
at least two grating components 110 ; and,

Containing; including a;

The grating component 110 is,

The body portion 113 of the square plate shape; and,

Including;;

Both ends of the support 112 are coupled to the connecting bar 140 by welding,

A portion spaced apart between neighboring grating components 110 is a portion through which the plating solution penetrates during plating, and a portion through which water is drained when the product is installed on site.
10. The method of claim 9,

A plurality of drain holes 111 passing through the body portion 113 are formed, the circumference of the drain hole 111 extends downward to form a flange portion 111b, and an inlet groove is formed at the upper end of both ends of the support portion 112 . (114) is formed,

The width (w) of the upper surface of the grating component 110 is constant, the height (h) of the support part 112 is adjusted according to the size of the upper load that the grating must support, and the grating component corresponds to the width (s) of the grating The length of (110) is adjusted, and the number of couplings of the grating component (110) and the length of the connecting bar (140) are adjusted in response to the length (L) of the grating.