KR20210102569A - Method for manufacturing gratings of various specifications in one press mold, and grating manufactured by the manufacturing method - Google Patents

Abstract

According to the present invention, a grating manufacturing method enables width of an upper surface of a grating component to be uniform, increases height of a side surface when upper load supported by the grating requires high load, reduces height of the side surface when the upper load requires low load, corresponds by controlling width (p) of a metal plate according to the height of the side surface, and controls length of the grating component by corresponding to width (s) of the grating, controls the coupling number of the grating component and the length of a connection bar by corresponding to the length (L) of the grating, thereby manufacturing various sizes of the grating through a single press mold. Moreover, according to the present invention, the grating allows plating solution to be smoothly permeated between the grating components during plating work and has excellent drain performance.

Description

Method for manufacturing gratings of various specifications with one press mold, and gratings manufactured by the manufacturing method

The present invention relates to a method of manufacturing a grating, and more specifically, if the upper surface width (w) of the grating component is constant and the upper load that the grating must support is high load is required, the height (h) of the side is increased and the upper load If this low load is required, the side height (h) is reduced, but according to the side height (h), the width (p) of the metal plate is adjusted to respond, and the length of the grating component is adjusted according to the width (s) of the grating And, it is possible to adjust the number of couplings of the grating components and the length of the connecting bar corresponding to the length (L) of the grating, 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.

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 1 includes an end bar 2 having a rectangular interior 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 1 , and a plurality of bearing bars 3 are arranged parallel to 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 1 having the above structure has a problem that it takes a lot of time and money to manufacture the end bar 2 , the bearing bar 3 , and the cross bar 4 and weld them, respectively, and the grating structure Among the load-bearing classifications, it can be classified into vertical and horizontal loads. Among these two categories, there is a problem that the replacement rate of grating damage due to the horizontal load, which causes damage to the bare bar due to sudden stopping and sudden start of the vehicle, is very high.

In addition, since the grating 1 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 1 , 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.

In order to solve these problems, the present applicant has developed a grating made by forming a drain hole in a metal plate and bending it to manufacture a grating component and then directly connecting and combining these grating components, which was registered as Korean Patent Registration No. 10-2040487. there is a bar

The grating has the advantage that the bearing bar 3 and the cross bar 4 are not required and the number of welding spots can be reduced.

However, since the grating uses a press mold to form a drain hole and bend a metal plate, if the size of the grating is changed, for example, if the number of drain holes is changed or the width or length of the grating is changed, the press mold must be replaced. There is this.

In addition, the grating is plated to prevent corrosion after connecting the grating components with a connection bar, but there is a problem that the plating solution does not penetrate between the grating components because the grating components are in close contact with each other.

In addition, the grating also has a problem that a noise is generated when a car or a person passes over it, and a problem that the grating is stolen after being installed in the field.

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 surface width (w) of the grating component constant, increases the height (h) of the side when a high load is required for the upper load that the grating must support, and increases the height (h) of the side surface when a low upper load is required Reduce the height (h), 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) An object of the present invention is to provide a grating manufacturing method capable of adjusting the combined number of grating components and the length of the connecting bar in response.

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 method for manufacturing a grating capable of reducing noise generated when a vehicle or a person passes over the grating.

Another object of the present invention is to provide a method for manufacturing a grating having an anti-theft means.

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, (a) a metal plate slit to a predetermined width (p) in consideration of the upper surface width (w) and the height (h) of the side surface 112 of the grating component 110 to be manufactured (1) preparing; (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 simultaneously with step (c), bending both sides of the metal plate at a right angle to form the side surface 112 .

The manufacturing method makes the upper width w of the grating component 110 constant, but increases the height (h) of the side surface 112 when the upper load that the grating must support is large, and increases the height (h) of the side surface 112 when the upper load is small. Since the height (h) of the side 112 is reduced, the width (p) of the metal plate (1) is adjusted according to the height (h) of the side surface (112). 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).

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 .

It may be coupled to the connecting bar 140 by welding to both ends of the support 112 . 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 combined connecting bar 140 and the grating component 110 may further include a support frame 170 accommodated therein. A nut 176 may be installed on the horizontal portion 172 of the support frame 170 , and a buried fixing part 175 may be installed on the outer surface of the support frame 170 . The embedding fixing part 175 may be embedded in concrete.

A bolt hole 117 is formed at the end of the body portion 113 of the grating component 110 of at least some of the grating components 110 , and a bolt 178 is inserted into the bolt hole 117 and installed, the bolt 178 . The lower end of the may be fastened with the nut 176 to fasten the grating component 110 and the support frame 170 .

A protrusion 142 protruding outward is formed on the connecting bar 140 , and the protrusion 142 reduces the noise by reducing the distance between the vertical portion 174 of the support frame 170 and the connecting bar 140 . can

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 surface width (w) of the grating component constant, increases the height (h) of the side when a high load is required for the upper load that the grating must support, and increases the height (h) of the side surface when a low upper load is required Reduce the height (h), 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) In response, the combined number of grating components and the length of the connecting bar can be adjusted, so 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.

Third, noise generated when cars or people pass over the grating can be reduced.

Fourth, it can prevent the grating from being stolen.

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;
FIG. 4 is a cross-sectional view taken along line AA′ of FIG. 3 .
5 is a plan view showing a support frame installed under the grating.
6 is a cross-sectional view showing that the grating is installed in the drain.
7 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.
Fig. 8 (a) is a cross-sectional view showing a punching part when punching is performed;
Figure 8 (b) is a cross-sectional view showing a punching portion in the case in which the punching is not made.
9 is a plan view showing that punching and cutting are made on a metal plate in a continuous automatic production method.
10 is a plan view showing that burring and bending are simultaneously made to the metal plate.
Figure 11 (a) (b) is a cross-sectional view showing that the burring and bending is made to the metal sheet at the same time.
12 is a cross-sectional view showing that burring is made for a metal plate.
13 is a cross-sectional view showing that bending is performed with respect to a metal sheet.
14 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.
15 (a) is a plan view showing that a grating component is 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, FIG. 15 (b) is a burring A plan view showing the bending of a processed metal sheet.
16(a)(b)(c) are a top view, a B'-B' cross-section, and a BB cross-section showing a grating component with a deformed drain.
17 is a plan view showing that the drain hole of FIG. 16 is formed in a metal plate.
18(a)(b)(c) are a top view, a C'-C' cross-section, and a CC cross-section showing a grating component with another modified drain hole.
19 is a plan view showing that the drain hole of FIG. 18 is formed in a metal plate.
20(a)(b)(c) are a top view and a D'-D' cross-section showing a grating component with another modified drain hole. and, DD cross section.
21 is a plan view showing that the drain hole of FIG. 20 is formed in a metal plate.
22(a)(b)(c) are top views and E'-E' cross-sections showing a grating component with another modified drain hole. and, the EE section.
23 is a plan view showing that the drain hole of FIG. 22 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.

structure 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 steel, stainless steel, aluminum alloy, synthetic resin, plastic, FRP, or the like.

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 main body 113 is preferably formed to extend slightly more outwardly than the support 112 , and thus both ends of the support 112 are located below the main body 113 , and both sides of the support 112 . Combination of the end and the connecting bar 140 (eg, spot welding, etc.) is also made under the main body 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. 7) 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 . The stopper is disclosed in Korean Patent Registration No. 10-2040487 of the present applicant, and the contents disclosed in the Patent Registration Publication are all included in this specification.

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 the bolt hole 117 is provided with an anti-theft bolt (178 in FIG. 6), which will be described later.

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.

In addition, there is an inlet groove 114 between the upper end of the end of the support 112 and the main body 113 , and the inlet groove 114 facilitates bending of the support 112 .

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 By reducing the height (h) of the side 112 but adjusting the width (p) of the metal plate 1 according to the height (h) of the side 112, the grating corresponds to the width (S) of the grating 100 The length of the 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, 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 require the bearing bar 3 and the cross bar 4 of the existing grating 1 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.

The grating 100 may be installed alone or in the drain, but may also be installed together with the support frame 170 . FIG. 5 is a plan view showing the support frame 170 , and FIG. 6 is a cross-sectional view showing that the grating 100 is installed in the drain hole and shows that it is installed on the support frame 170 .

The support frame 170 is a frame having a space in which the grating 100 can be accommodated, and preferably has a rectangular shape. The support frame 170 includes a horizontal portion 172 , a vertical portion 174 , and an embedded fixing portion 175 .

A nut 176 is installed on the horizontal portion 172 . The bolt 178 is inserted and installed into the bolt hole 117, and the lower end of the bolt 178 is fastened with the nut 176 to fasten the grating component 110 and the support frame 170, and accordingly the grating 100 Theft can be prevented.

In addition, the buried fixing part 175 is a part to be embedded in the concrete constituting the drainage channel, etc., and is installed on the outer surface of the support frame 170 .

How to make the grating

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

7 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.

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 size of the upper load that the grating 100 must support is large, the height (h) of the side surface 112 increases and, accordingly, the width p Also, if the size of the upper load is small, the height (h) of the side surface 112 is small, and accordingly the width (p) is also decreased.

The length (s) of the grating component 110 is determined by the width (s) of the grating 100 to be manufactured. Specifically, a green solid line in FIG. 7 is a part for manufacturing the grating component 110 having a length s1, and a green circle is a part where punching is made. And, the red dotted line is a part for manufacturing the grating component 110 having the length s2, and the green circle and the red circle are the punching parts (for reference, in the section s1, the red dotted line is hidden by the green solid line). That is, when manufacturing the grating component 110 having a length s1, only a green circle part is punched, and when manufacturing the grating component 110 having a length s2, a green circle and a red circle part are punched.

When manufacturing the grating component 110 having a length s1, the red circle part is not punched out. For this purpose, the press mold has a punching part as shown in FIG. 8(a)(b).

FIG. 8(a) shows the punching part 310 of the part where punching is made. 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 .

On the other hand, FIG. 8(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

9 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. 9 , the same reference numerals as those of FIGS. 1 to 8 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 green solid line is a part for manufacturing the grating component 110 having a length s1, and a green circle is a part where punching is made. And, the red dotted line is a part for manufacturing the grating component 110 having the length s2, and the green circle and the red circle are the punching parts (for reference, in the section s1, the red dotted line is hidden by the green solid line). That is, when manufacturing the grating component 110 having the length s1, only the green circle part is punched, and when the grating component 110 having the length s2 is manufactured, the green circle and the red circle part are punched.

At this time, when manufacturing the grating component 110 having a length s1, the punch portion 310 of the punched portion is a spacer 314 is inserted between the ceiling of the punch portion 310 and the punch 312. state (FIG. 8(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. 8(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, which has been punched and cut, is moved to the 'burring and bending process' by a robot or transfer (transfer device). 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). 10 to 11, in the 'burring and bending process', burring and bending are performed at the same time.

10 is a plan view showing that burring and bending are simultaneously made on the metal plate 1, and FIGS. 11 (a) (b) are cross-sectional views showing that burring and bending are simultaneously made on the metal plate 1 .

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. 11 (a), the punched metal sheet 1 is placed on the lower mold in an inverted state. Subsequently, as shown in FIG. 11 ( 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 expanding the provisional drain 11 . and molded into a drain hole 111 . Then, the reamer 323 expands the provisional drain hole 11 while being inserted into the groove 327 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).

12 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 .

13 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)

14 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. 14, 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).

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. 11 .

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

15 (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 15 (b) is a plan view showing that the burring-processed metal plate 1 is bent.

In FIG. 15( a ), a green solid line is a part for manufacturing the grating component 110 having a length s1 , and a red dotted line is a part for manufacturing the grating component 110 having a length s2 . That is, it is possible to 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. 12 .

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

Variant of drain hole

16(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. 17 is a plan view showing the metal plate material in which the drain hole is formed 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.

18(a)(b)(c) are plan views, C'-C' cross-sectional views and CC cross-sectional views, respectively, showing the grating component 110 having another modified drain hole, and FIG. 19 is a metal plate with the drain hole formed therein This is a floor plan showing

And, Figs. 20(a)(b)(c) are plan views, D'-D' cross-sectional views and DD cross-sectional views, respectively, showing the grating component 110 having another modified drain hole, and Figure 21 is a metal in which the drain hole is formed. It is a plan view showing the plate material.

In addition, FIGS. 22(a)(b)(c) are plan views, E'-E' and EE cross-sectional views, respectively, showing the grating component 110 having another modified drain hole, and FIG. 23 is a metal in which the drain hole is formed. It is a plan view showing the plate material.

As for the grating components 110, the periphery 111f of the drain hole 111 is formed lower than the upper surface (surface 113) of the grating, and an inclined surface is formed between the periphery 111f of the drain hole 111 and the upper surface 113 of the grating. .

1, 100: grating 1: metal plate
11: drain hole
110: grating component 111: drain hole
112: side of the grating component (support part)
140: connection bar 142: projection
170: support frame p: width of metal plate
w : top width of grating component
s : length of grating component (width of grating)
L: length of grating
310: punching unit 312: punch
316, 322, 342, 348: spring
320: rectangular groove

Claims (10)

In the method of manufacturing a grating component 110 by processing the metal plate 1 with a press mold and combining a plurality of grating components 110 in a horizontal direction to manufacture a grating,
(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 Grating manufacturing, characterized in that by adjusting the combined number of grating components 110 and the length of the connecting bar 140 in response to the length L of the grating, gratings of various specifications can be manufactured with one press mold Way. 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 the steps (c) and (d) are performed at the same time, but the punched metal sheet 1 is turned over and placed in 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 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,
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,
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 the burring of the step (c) for the metal plate 1 in 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. 6. The method according to any one of claims 1 to 5,
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. 7. The method of claim 6,
Between the grating components 110 in step (e) 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;;
It is coupled to the connecting bar 140 by welding at both ends of the support 112,
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. 9. The method of claim 8,
The coupled connecting bar 140 and the grating component 110 include a support frame 170 accommodated therein, and a nut 176 is installed on the horizontal portion 172 of the support frame 170 and the support frame ( On the outer surface of 170), a buried fixing part 175 is installed,
A bolt hole 117 is formed at the end of the body portion 113 of the grating component 110 of at least some of the grating components 110 , and a bolt 178 is inserted into the bolt hole 117 and installed, the bolt 178 . The lower end of the is fastened with the nut 176 to fasten the grating component 110 and the support frame 170,
The buried fixing part 175 is a grating, characterized in that it is embedded in the concrete. 10. The method according to claim 8 or 9,
A protrusion 142 protruding outward is formed on the connecting bar 140 , and the protrusion 142 reduces the noise by reducing the distance between the vertical portion 174 of the support frame 170 and the connecting bar 140 . Grating, characterized in that.

Images