KR20180099620A - Grating with deodorization with crating box to prevent backflow of fluid - Google Patents

Abstract

An object of the present invention is to provide an odor-blockable grating provided with a fluid backflow prevention box. According to the present invention, during downward rotation of an opening and closing plate, drainage is facilitated by an opening and closing angle of at least 60 degrees. A backflow prevention plate is provided between inner and outer frames of the opening and closing plate for waste stagnation minimization. In addition, sealability for odor blocking is enhanced and a backflow water pressure can be better responded to. In order to achieve the above object, the present invention provides a sewer-covering grating including an outer frame disposed in a sewer, inner frames spaced apart at regular intervals inside the outer frame to form a sewage inlet, and an opening and closing plate rotating to seal the sewage inlet. In the grating, at least one elastic means is provided. The opening and closing plate is rotated downwards by 60 degrees or more by the weight of the sewage introduced into the sewage inlet, and the opening and closing plate is rotated and restored by the elastic force of the elastic means. Accordingly, the sewage inlet is blocked. A rotary shaft is inserted into an insertion hole formed in the longitudinal direction on the other width-direction side of the opening and closing plate. The present invention further includes a grating box in which the grating is provided. The upper and lower portions of the grating box are open. The upper end portion is formed with a release prevention step protruding inwards and the lower end portion is formed with a seating portion on which the grating is seated. The grating is inserted into the upper side of the grating box, seated on the seating portion, and then provided inside the grating box by pushing the grating to one side.

Description

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

The present invention relates to a grating, and more particularly, to a grating including a grating for enclosing an outside of a grating, and an grating for grating is provided with an open / close plate, so that the sewage inlet is kept closed by the open / In addition, when the sewage flows into the sewage inlet as in the case of rainfall, the sewage inlet is opened by the weight of the sewage to prevent the backflow of the fluid that smoothes the drainage. The present invention relates to a grating capable of blocking odors.

In addition, in order to effectively prevent the reverse flow of sewage in the lowlands, a grating box capable of inserting and separating the grating is provided, thereby providing a grill capable of blocking the odor with the backflow prevention of the fluid to withstand the water pressure due to the reverse flow of the sewage, .

Generally, a drainage channel is installed in the underground along the edge of the road so that sewage such as rainwater on the road can be smoothly flowed into the river, and drainage pipes for introducing sewage to the upper side of the drainage channel are installed at intervals. Ensure that rainwater does not accumulate on the road and is discharged smoothly.

As described above, most of the sewer installed on the road is provided with a sewer lid formed by molding a grating or a concrete made by welding or casting iron in a lattice shape to prevent the pedestrian from falling into the sewer, and a plurality of sewage inlets So that sewage can flow smoothly into the drainage channel.

The sewer lid made of the above-mentioned grating or concrete is usually constructed to open the inside of the sewer through the inlet of the sewer lid. Thus, it is possible to cope with the hydraulic pressure against the back pressure of the low- Sealing and maintenance are not taken into account.

The relatively large trash or dirt is filtered by the drain cover, but small sized cigarette butts and scraps of debris can easily flow into the drain through the sewage inlet of the drain cover and accumulate under the drain.

When the amount of accumulated dirt in the sewer increases repeatedly due to the repeated inflow of various kinds of dirt, the drainage path connected to the inside of the sewage is blocked, and when the inflow amount of the sewage increases, the drainage is not smooth and the sewage flows back to the outside .

In addition, when the backwash is generated, the grating is released by the reverse flow water pressure, and a safety accident that the pedestrian is lost due to invisible in the water occurs.

In order to solve such a problem, a Registration Practical Utility Model No. 20-0475383 (registered date: November 21, 2014) has been proposed. However, the above-mentioned prior art is disadvantageous in that the grating formed on the upper part of the sewer, And an opening and closing plate is provided to open or close the inlet so that the sewage inlet is kept closed by the opening and closing plate in the normal state to prevent the entry of dirt into the inside of the sewer while blocking the odor generated from the inside of the sewer, When the sewage flows into the sewage inlet, the sewage inlet is opened by the weight of the sewage to smooth the drainage.

However, as shown in FIG. 1, when the opening / closing plate 30 is resiliently supported by the leaf spring 40 so that the opening / closing angle of the opening / closing plate 30 is as small as 45 deg. To 60 deg. , There is a problem that drainage is not smooth.

In addition, when the flow rate of the sewage is large, there is a problem that the restoring force of the spring is lowered due to the deformation of the leaf spring, and there is a problem of the airtightness of the open / close plate against the reverse flow water pressure.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems, and it is an object of the present invention to provide an air- It is an object of the present invention to provide a grating capable of blocking odor with minimized wear, enhancing airtightness for blocking odor, and preventing reverse flow of fluid having improved responsiveness to backwash water pressure.

However, the object of the present invention is not limited to the above-mentioned object, and another object which is not mentioned can be understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a sewage disposal system comprising: an outer frame disposed in a sewer; an inner frame spaced apart from the outer frame by a predetermined distance to form a sewage inlet; Wherein the grating includes at least one elastic means, the opening and closing plate is rotated downward by 60 degrees by the weight of the sewage introduced into the sewage inlet, Further comprising: a grating in which the opening and closing plate is rotated and restored by the elastic force to block the sewage inlet, a rotation shaft is inserted into the insertion hole formed in the longitudinal direction on the other side in the width direction of the opening and closing plate, The upper and lower parts of the grating box are open, And a grating is provided at the lower end of the grating. The grating is inserted into the upper portion of the grating and is seated in the seating portion, and then the grating is provided inside the grating by pushing the grating to one side. / RTI >

In addition, a plurality of coupling grooves are formed at predetermined intervals in the separation preventing jaws of the grating hanger, and an outer frame of the grating is formed with a locking protrusion projecting outwardly to correspond to the coupling grooves.

In addition, an elastic plate for covering the coupling groove is provided on the lower side of the separation preventing jaw, and the other side of the elastic plate is fixed to the lower side of the separation preventing jaw.

The upper end of the outer frame is formed with an outer frame side protrusion protruding inwardly of the outer frame. The inner frame has a T-shaped cross section and an inner frame side protrusion protruded to both sides at an upper end thereof The open / close plate is provided on the lower side of the protruding jaws on the outer frame side and on the inner frame side to block the smell of the sewer and to prevent the reverse flow of sewage.

A connection hole is formed in the outer frame and the inner frame of the grating for inserting the rotation axis of the opening and closing plate so that the opening and closing plate is engaged with the connection hole. A coil spring for rotation, which is an elastic means for elastically supporting the opening and closing plate, And the opening / closing angle is rotated by 60 degrees or more when the open / close plate is rotated downward by the weight of the sewage flowing into the sewage inlet.

Further, the rotation shaft is inserted into the rotation shaft coil spring, one end of the rotation shaft coil spring is engaged with the rotation shaft, and the other end is engaged with or attached to the inner and outer frames.

The rotation axis of the opening / closing plate is protruded through the connection hole of the outer frame, the rotation axis is inserted into the inside of the rotation axis coil spring, one end of the rotation axis coil spring is engaged with the rotation axis, Is coupled to the outside of the longitudinal side surface of the outer frame.

A plurality of coil springs for the opening and closing plate as the elastic means are provided so that one end thereof is in contact with the lower surface of the opening and closing plate and the other end thereof is in contact with or fixed to the inner surface of the outer frame and the inner frame, When the open / close plate rotates downward due to the weight of the sewage, the opening / closing angle is rotated at 60 degrees or more.

On the other hand, a bracket binding opening is formed on the inner side of the outer frame or the inner frame, and a reinforcing bracket coupled to the rotation shaft is provided on the bracket binding opening to support the opening and closing plate.

The reinforcement bracket may include a head portion having an insertion port into which the rotation shaft is inserted and a root portion extending from the head portion to one side and inserted into the bracket coupling hole, An insertion groove is formed to insert the head portion.

The root portion is provided with a threaded root portion for forming a thread, and a screw groove is formed in the bracket coupling hole, so that the reinforcing bracket is screwed into the outer frame or the inner frame.

In addition, the connection hole and the insertion opening are formed in a circular shape with the fixed rotation of the rotation shaft or as a long oval long hole in the vertical direction for upward and downward flow rotation of the opening and closing plate.

The reinforcing bracket includes an elastic body. The reinforcing bracket includes a split root portion divided into two fins so that the split root portion is divided into two fins, and the two fins are connected to an external force And is inserted into the bracket coupling hole, The pin is returned to the original position, and one side of the two pins is provided with a latching portion to be hooked on the inner side of the outer frame or the inner frame, and the reinforcing bracket is provided on the outer frame or the inner frame.

On the other hand, a sealing plate is attached to the lower surface of the protruding jaws on the side of the outer frame or the inner frame to seal a gap between the opening and closing plate and the inner and outer frames, and a billboard for advertising and advertising is printed on the upper surface of the opening and closing plate do.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

As described above, according to the present invention, when the opening and closing plate rotates downward, the opening and closing angle is rotated to 60 degrees or more to smooth the drainage, and the backflow preventing plate is provided between the opening and closing plate and the inner and outer frames, So that it is possible to prevent malfunction of the open / close plate.

In addition, the grating is detachably attached from the grating, so that it is easy to repair and repair not only the counterflow water pressure but also the counterflow water pressure.

1 is an exploded perspective view of a conventional grating,
FIG. 2 is a view showing the combination of the grating box and the grating according to the present invention,
3 is a cross-sectional view of a grating box according to the present invention,
4 is a perspective view of a grating according to the present invention,
5 is an exploded perspective view of a grating according to an embodiment of the present invention,
FIG. 6 is a perspective view of a grating to which a coil spring according to the present invention is coupled,
FIG. 7 is an enlarged view of the 'A' portion of FIG. 8,
8 is a cross-sectional view of a grating in accordance with an embodiment of the present invention,
9 is a bottom perspective view of an open / close board having a plurality of coil springs according to another embodiment of the present invention,
10 is a cross-sectional view of a grating according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

FIG. 4 is a perspective view of a grating according to the present invention. FIG. 5 is a perspective view of a grating according to an embodiment of the present invention. FIG. 5 is a perspective view of a grating according to an embodiment of the present invention. FIG. 6 is an exploded perspective view of a grating, FIG. 6 is a perspective view of a grating to which a coil spring is coupled according to the present invention, FIG. 7 is an enlarged view of a portion A ' 9 is a bottom perspective view of an open / close board having a plurality of coil springs according to another embodiment of the present invention, and FIG. 10 is a sectional view of a grating according to another embodiment of the present invention.

2, a grating according to an embodiment of the present invention covers a top portion of a sewer, and a grating 200 is provided inside the grating box 100. As shown in FIG.

First, the grating box 100 and the grating 200 according to the present invention may have various shapes such as a quadrangle, a circle, a trapezoid, and a rhombus. In an embodiment of the present invention, the grating box 100 having a rectangular- 100 and the grating 200 will be described with reference to the drawings.

The grating 200 includes an outer frame 210 formed in a shape that can be seated on the upper portion of the sewer, an inner frame 220 for forming a plurality of inner and outer portions of the outer frame 210 spaced apart from each other, And an open / close plate 230 that rotates to close the sewage inlet.

At this time, when the opening / closing plate 230 is rotated downward, elastic means is provided to rotate the opening / closing angle by 60 degrees or more. In the insertion hole formed in the other widthwise direction of the opening / closing plate 230, 231) is inserted.

In addition, at least one elastic means is provided to rotate the opening / closing plate 230 downward by 60 degrees due to the weight of the sewage introduced into the sewage inlet, and the opening and closing plate 230 is rotated and restored by the elastic force of the elastic means And the sewage inlet is blocked.

That is, when the open / close board 230 rotates downward, it is opened at 90 degrees.

In addition, a billboard for advertising and advertising can be printed on the upper surface of the open / close board 230.

The upper and lower portions of the grating box 100 are opened and the upper and lower portions of the grating box 100 protrude inwardly and the lower portion of the grating box 100 has a seating portion 120 on which the grating 200 is mounted.

Therefore, the grating 200 is provided in the grating 100 by the separation preventing chuck 110.

 The grating 200 is inserted into the upper portion of the grill box 100 and is seated in the seating portion 120 and is then installed in the grill 100 by pushing the grill 200 to one side.

That is, a plurality of engagement grooves 111 are formed in the separation preventing tucks 110 of the grating box 100 at predetermined intervals, and the outer frame 210 of the grating 200 is provided with the engagement grooves 111, And an engagement protrusion 211 protruding outwardly to correspond thereto is formed.

In addition, the coupling grooves 111 are formed in a plurality of pairs at opposite upper ends of the separation preventing jaws 110 so as to face each other.

The other side of the elastic plate 130 is engaged and fixed to the lower side of the release bust tuck 110. The elastic bands 110 are formed on the lower side of the release bust tuck 110, do.

Accordingly, the engaging step 211 of the grating 200 is positioned at a position corresponding to the engaging groove 111 of the grating box 100, and the grating 200 is inserted from the upper side of the grating box 100.

The elastic plate 130 having the other side engaged and fixed is bent downward due to the load of the grating 200 to open one side and the grating 200 is seated on the seating part 120 of the grating 100, The grating 200 is coupled to the grating box 100 by preventing the grating 200 from being separated by blocking the engaging groove 111 when the elastic plate 130 is pushed to one side.

Further, the upper surface of the seating part 120 may be formed with a tightly fitting part 121 as an elastic body. The grinder 200 is closely attached to the grating 100 by the tight contact part 121 when the grinder 200 is inserted into the grating 100 and moved to one side.

Therefore, it is possible to improve the adhesion between the grilling box 100 and the grating 200, thereby blocking the smell of the sewer and blocking the reverse flow of the sewage.

The upper end of the outer frame 210 is formed with an outer frame side protruding protrusion 212 protruding inward from the outer frame 210. The inner frame 220 has a T- An inner frame side projecting step 221 protruding from both sides is formed.

Therefore, the opening / closing plate 230 is provided on the lower side of the outer frame side and the inner frame side protrusions 212 and 221.

A sealing plate 260 is attached to the lower surface of the protrusions 212 and 221 on the outer frame side or the inner frame side to close the gap between the opening and closing plate and the inner and outer frames to block the smell of the sewer, Can be blocked.

At this time, the sealing plate 260 is made of an elastic member such as rubber.

In addition, depending on the degree of hermeticity, the projecting tabs 212 and 221 and the sealing plate 260 can be selectively installed.

5 to 8, a connection hole 213 is formed in the outer frame 210 so that the rotation axis 231 of the opening / closing plate 230 is inserted into the outer frame 210 so that the opening and closing plate 230 is engaged.

At this time, the connection holes 213 are provided on opposite sides of the longitudinal direction of the outer frame 210 so as to face each other.

In addition, the connection hole 213 may be formed in a circular shape depending on the purpose, or may be formed as a long oval long hole in the vertical direction as shown in FIG.

When the connection hole 213 is formed in a circular shape, the rotation shaft 231 is fixed and rotated to rotate the opening and closing plate. When the connection hole 213 is formed as a long hole, the rotation shaft 231 can move up and down.

That is, when the airtightness of the opening / closing plate 230 needs to be increased according to the backflow pressure, the opening / closing plate 230 can be moved and the airtightness can be improved by forming the connection hole 213 as a long hole.

A connection hole 213 is formed in the outer frame 210 and 220 of the grating to insert the rotation shaft 231 of the opening and closing plate 230 so that the opening and closing plate 230 is engaged. A plurality of coil springs 280-1 for rotating shafts serving as elastic means for elastically supporting the opening / closing plate 230 are provided, and when the opening / closing plate rotates downward due to the weight of sewage flowing into the sewage inlet, Lt; / RTI >

The rotation shaft 231 is inserted into the rotation shaft coil spring 280-1 and one end of the rotation shaft coil spring 280-1 is coupled to the rotation shaft 231, And is joined or tightly joined to the inner and outer frames 220 and 210.

In addition, coil springs 280-1 for rotating shafts, which are elastic means for elastically supporting the opening / closing plate 230, are provided at both ends of the rotating shaft 231, When the opening / closing plate rotates downward, the opening / closing angle is rotated by 60 degrees or more.

That is, the rotation shaft 231 is inserted into the rotation shaft coil spring 280, one end of the rotation shaft coil spring 280-1 is engaged with the rotation shaft 231, (Not shown).

The rotation shaft 231 of the opening and closing plate 230 may protrude through the connection hole 213 of the outer frame 210 so that the inner side of the coil spring 280-1 One end of the coil spring 280-1 for rotation is coupled to the rotation shaft 231 and the other end of the coil spring 280-1 is coupled to the outside of the longitudinal side of the outer frame 210 .

At this time, the rotation shaft 231 is coupled to the open / close board 230 so that the open / close board 230 and the rotation shaft 231 are rotated together.

The grating 200 is provided with a reinforcing bar 290 located at an upper portion of the opening and closing plate 230 so as to be spaced apart from the grating 200 in a direction intersecting the inner frame 220, To protect the grating 200.

In addition, a seating groove 202 is formed at the upper ends of the outer and inner frames 210 and 220 so as to face each other in the width direction, and the reinforcing bar 290 is seated and fixed to the seating groove .

Therefore, when the sewage flows backward, the opening / closing plate 230 can be supported to improve the sealing effect.

A support reinforcement step 201 for preventing warpage of the opening / closing plate 230 by external pressure is formed on an inner side surface of the outer frame 210 and the inner frame 210. [

Further, even when the open / close board 230 is long, the support reinforcement step 201 may be provided.

That is, the support reinforcement step 201 protrudes from the inner side of the outer frame 210 and 220 and supports the opening / closing plate 230.

A reinforcing jaw insertion groove 233 is formed in the opening and closing plate 230 at a position corresponding to the supporting reinforcing jaw 201 for the rotation of the opening and closing plate 230. When the opening and closing plate 230 rotates downward , And the support reinforcement step 201 is inserted into the reinforcement jaw insertion groove 233.

A lid fitting part 214 extending in the longitudinal direction of the outer frame 210 is formed and a lid frame 270 covering the spring device part where the lid rotating shaft 231 and the spring 280 are engaged can be coupled .

The cover frame 270 may be joined by welding.

Therefore, it is possible to prevent the spring device unit from being damaged due to foreign matter being caught in the spring 280 and protecting the spring device unit.

9 to 10, the coil spring 280-2 for the opening / closing plate as the elastic means is in contact with the lower surface of the opening / closing plate 230 at one end and the other end is connected to the outer frame, 210 and 220 so that the opening and closing angles are rotated by 60 degrees or more when the opening and closing plate is rotated downward by the weight of the sewage flowing into the sewage inlet, .

At this time, it is preferable that the coil spring 280-2 for the opening / closing plate is provided as a torsion spring.

The rotation shaft 231 is not engaged with the opening / closing plate 230, so that only the opening / closing plate 230 is rotated.

A bracket coupling hole 240 is formed on the inner side of the outer frame 210 or the inner frame 200. A reinforcing bracket 250 coupled to the rotation shaft 231 is formed on the bracket coupling hole 240, And supports the open / close board 230.

The reinforcing bracket 250 includes a head portion 251 formed with an insertion port 252 through which the rotation shaft 231 is inserted and a bracket coupling portion 240 extending from the head portion 251 to one side, And a root portion to be inserted.

A plurality of insertion grooves 234 are formed on the lower surface of the opening / closing plate 230 so as to be symmetrical with respect to the insertion direction of the head 251.

In addition, the insertion port 252 is preferably formed as a long elliptical long hole in the vertical direction, so that the opening / closing plate 230 can move up and down.

That is, when sewage flows backward, the opening / closing plate 230 is moved upward to improve the hermeticity.

A threaded groove is formed in the bracket coupling hole 240 so that the reinforcing bracket 250 is engaged with the inner side surface of the outer frame or the inner frame, As shown in FIG.

Meanwhile, the bracket coupling hole 240 may be formed to pass therethrough, and the root portion is inserted into the through-hole bracket coupling hole 240.

At this time, the reinforcing bracket 250 is formed of an elastic body and is provided with a split type root portion 253, and the divided root portion 253 is contacted by an external force and inserted into the bracket binding hole 240 And a locking part 254 is formed at one side of the divided root part 253 so as to be caught by the inner side surfaces of the outer frame 210 or the inner frame 220.

That is, the reinforcement bracket 250 is formed of an elastic body, and the split root 253 is divided into two fins so as to be opened.

Accordingly, the two pins are brought into contact with each other by an external force and inserted into the bracket coupling hole 240, the two pins are returned to the original state, and the outer frame 210 or the inner frame 220 is connected to one side of the two pins. The reinforcing bracket 250 is provided on the outer frame or the inner frame.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

100: grating 110:
111: coupling groove 120:
130: elastic plate 200: grating
210: outer frame 211:
212: outer frame side protruding jaw 213: connecting hole
220: inner frame 221: inner frame side protruding jaw
230: opening / closing plate 231:
240: bracket coupling part 250: reinforcing bracket
260: sealing plate S: sewage

Claims (9)

An outer frame provided in the sewer, an inner frame spaced apart from the inner frame by a predetermined distance to form a sewage inlet, and an open / close plate rotated to close the sewage inlet, In the grating,
The grating includes at least one resilient means, and the opening / closing plate is rotated downward by 60 DEG or more due to the weight of the sewage introduced into the sewage inlet. The opening / closing plate is rotated and restored by the elastic force of the elastic means to block the sewage inlet ,
A bracket coupling means is formed on an inner side surface of the outer frame or the inner frame of the grating and the bracket coupling means is provided with a reinforcing bracket capable of being inserted into the rotary shaft,
Further comprising a grating in which the grating is provided,
The upper and lower portions of the grating hanger are opened, and an upper portion of the grating hanger is formed with a separation preventing protrusion protruding inward, and a seating portion on which the grating is seated is formed at a lower end portion.
Wherein the grating is installed inside the grating by pushing the grating to one side after the grating is inserted into the upper side of the grating hinge and is seated in the seating portion.
The method according to claim 1,
Wherein a plurality of engaging grooves are formed at predetermined intervals in the escape preventing jaw of the grating hanger, and an engaging protrusion protruding outwardly corresponding to the engaging groove is formed in an outer frame of the grating.
3. The method of claim 2,
Wherein a connection hole is formed in the outer frame and the inner frame of the grating to insert the rotation axis of the opening / closing plate so that the open /
A plurality of coil springs for rotating shafts serving as resilient means for elastically supporting the opening / closing plate are provided at predetermined positions of the rotating shaft, and when the opening / closing plate rotates downward due to the weight of the sewage flowing into the sewage inlet, Of the grating.
The method of claim 3,
Wherein the rotation shaft is inserted into the rotation shaft coil spring, one end of the rotation shaft coil spring is engaged with the rotation shaft, and the other end is engaged with or attached to the inner and outer frames.
5. The method of claim 4,
Wherein the rotation shaft of the opening / closing plate protrudes through a connection hole of the outer frame, the rotation shaft is inserted into the inside of the rotation shaft coil spring, one end of the rotation shaft coil spring is engaged with the rotation shaft, And is coupled to the outside of the longitudinal side of the outer frame.
The method according to claim 1,
A plurality of coil springs for the opening and closing plate as the elastic means are provided so that one end thereof is in contact with the lower surface of the opening and closing plate and the other end thereof is in contact with or fixed to the inner surface of the outer frame and the inner frame, Wherein the opening / closing angle is rotated by 60 DEG or more when the opening / closing plate is rotated downward by the weight of the opening / closing plate.
The method according to claim 1,
The reinforcing bracket includes a head portion having an insertion port into which the rotation shaft is inserted,
And a root portion extending from the head portion to one side and inserted into the bracket coupling hole.
8. The method of claim 7,
Wherein the bracket binding port is penetrated to insert the root portion, and the reinforcing bracket is composed of an elastic body and has a split root portion of a widening shape,
The split root portions are brought into contact with each other by an external force, inserted into the bracket coupling means,
And a reinforcing bracket is provided on the outer frame or the inner frame so that the reinforcing bracket is provided on one side of the divided root portion so as to be hooked on the inner side surfaces of the outer frame or the inner frame.
8. The method according to claim 3 or 7,
Wherein the connection hole and the insertion hole are formed in a circular shape with the fixed rotation of the rotary shaft being formed in a circular shape or a long oval long hole in the vertical direction for rotating the upper and the lower of the opening and closing plate.

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