KR20180065116A - Noiseless trench cover - Google Patents

Abstract

Disclosed is a noiseless trench cover capable of minimizing noise caused by external force. According to the present invention, the noiseless trench cover comprises: a body having one side surface formed as a concave part, having the other (opposite) side surface formed as a convex part corresponding to the concave part, and having a plurality of vertically penetrated drain holes formed on an upper surface; a pair of hooks protruding from the concave part among the side surfaces of the body; a pair of locking holes formed on the convex part among the surfaces of the body corresponding to the pair of hooks, wherein the hook of another closely disposed trench cover is inserted into the inner space of the body to maintain a locked and coupled state; a first support part protruding in a curved shape to be in point contact with an installation surface of the lower center of an edge on one side among the side surfaces of the body, which are perpendicular to the concave and convex parts; a second support part protruding in a curved shape to be in point contact with an installation surface of one lower side of an edge on the other (opposite) side surface among the side surfaces of the body, which are perpendicular to the concave and convex parts; and a third support part protruding in a curved shape to be in point contact with an installation surface of another lower side of the edge on the other (opposite) side surface among the side surfaces of the body, which are perpendicular to the concave and convex parts.

Description

Noiseless trench cover {NOISELESS TRENCH COVER}

The present invention relates to a trench cover to be installed on a trench for drainage and collection of rainwater and domestic wastewater. More specifically, the present invention relates to a trench cover which is capable of adjusting the installation width and length, And more particularly, to a noise-free trench cover capable of minimizing occurrence of noise such as rattling or colliding with another adjacent trench cover even if the installation state is inclined at an angle.

Generally, in order to drain and collect rainwater or wastewater on the outdoors or edges of a parking lot, as well as on outdoor edges of roadsides and various buildings, a trench such as a drainage or a house water channel is made by drilling the floor, The trench cover is installed to prevent the pedestrian's foot, the wheels of the vehicle, or other dirt from falling into or entering the interior.

FIG. 1 shows an example of a trench cover according to the prior art (Korean Utility Model Laid-Open No. 20-0342685). A rib 11 is repeatedly formed on both sides of a body 10, And a connecting hole 16 is formed in the inside of the recessed portion 12 and the convex portion 13 so that the other trench cover So that they can be connected to each other by bolts 15 and nuts.

In this case, after one trench cover and another adjacent trench cover are in close contact with each other, the recessed portion 12 and the convex portion 13 formed on both sides of the trench cover are tightly coupled with the bolts 15 and nuts, Therefore, it takes much time and labor to connect and install.

In addition, since the recessed portions 12 on both sides of the trench covers are closely contacted with the convex portions 13 of the adjacent other covers when the trench covers are connected together, it is impossible to adjust the installation width thereof, There is a limitation in use that can not flexibly cope with a gap generated by a deformation of a support frame, a machining error, and an assembly tolerance caused by a concrete pouring pressure or the like.

Furthermore, in order to facilitate the installation in the field, the width of the trench cover is designed to have a clearance slightly smaller than the width of the support frame, so that it is loosely installed in a place where the influence of external force is frequent, So that the bolts 15 and the nuts for connecting the trench covers are easily deformed by the upward and downward bi-directional stresses or fatigue failure occurs.

FIG. 2 shows another example of a trench cover according to the prior art (Korean Patent Registration No. 10-0669922), which comprises a main body 1 having a plurality of water holes 11, And a connection fixed receiving portion 20 formed to be connected to the other end of the main body 1 in correspondence with the connection fixing portion 10. The connection fixed portion 10 is formed with at least one protrusion formed on the side surface thereof.

However, this is because the trench covers and the other types of trench covers, in which the connection fixing portions 10 and the connection fixing portions 20 are symmetrically formed, are staggered from each other so that the connection fixing portions 10, And the connection fixed receiving portion 20 are combined with each other. Therefore, it is necessary to provide a pair of heterogeneous trench covers as a pair, and since the adjustment width of the trench covers can not be adjusted, the deformation of the support frame And there is a limit in that it can not flexibly cope with a gap due to machining error or assembly tolerance.

In addition, the main body 1 is formed as a flat plate having a regular triangle shape, so that the portion contacting the support frame is widened at a wide angle, or a gap is formed. Thus, a place where frequent influences of the vehicle There is a problem that it easily flows and rattles and causes crashing and friction noise.

In addition, when a plurality of trench covers are connected together, the trench cover at the end of the trench cover can not be vertically disposed with respect to the support frame, so that there is a limit in that workability and efficiency of providing and finishing a separate finishing trench cover are lowered .

In order to solve the problems of the related art, a trench cover which has been researched and developed by the present inventor and is disclosed in Korean Patent No. 10-1065735 is disclosed.

However, since it is a structure to connect between trench covers, it is easy to adjust the installation width and length of the trench cover so that it can be easily connected to each other. However, there are advantages such as restriction of installation site, The trench is inclined obliquely when it is deformed by various conditions of the vehicle. In this case, noise such as rattling or collision with another adjacent trench cover occurs when the vehicle is running.

In addition, there is a high risk of a safety accident that a pedestrian falls off due to a serious inconvenience to a woman, for example, a sheath of a high heel is easily slipped or caught in a drainage hole.

KR10-2015-0093547A (2015.08.18) KR10-2009-0094688E (2009.09.08) KR10-0551591 B1 (2006.02.13) KR10-0597032 B1 (2006.07.04) KR10-0669922 B1 (2007.01.16) KR20-0342685 Y1 (2004.02.10) KR10-1039711 B1 (2011.06.01) KR10-1065735 B1 (September 10, 2011) KR20-0378363 Y1 (2005.03.02) KR10-1018392 B1 (Feb 22, 2011)

Accordingly, the present inventor has focused on solving the limitations and problems of the existing trench cover considering the above-mentioned matters in a comprehensive manner, so that the support frame is distorted or distorted due to various conditions such as constraints and conditions of the installation site, The installation width and length can be freely adjusted even if a clearance is generated due to assembly tolerance or machining error, so that it is possible to provide a simple, easy and solid installation, and even if the installation state is inclined obliquely, The inventors of the present invention have made efforts to develop a new trench cover which can minimize noise caused by an external force and can more effectively prevent the heel of a high heel from being lost.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a trench cover that minimizes noise generated by an external force.

It is another object of the present invention to provide a trench cover for preventing the heel of a high heel from being detached.

Herein, the technical object and object to be solved by the present invention are not limited to the technical object and purpose mentioned above, and another technical object and purpose not mentioned can be understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided a method of manufacturing a semiconductor device, comprising the steps of: forming a concave portion on one side and a convex portion corresponding to the concave portion on the other side (opposite side) A body having a plurality of drain holes vertically extending in an upper surface thereof; A pair of hooks protruding from the concave portions of the side surfaces of the body; A pair of hooks formed to correspond to the pair of hooks on the convex portion among the side surfaces of the body and to hold the hooks of the adjacent trench covers inserted into the inner space of the body so as to engage with each other; A first receiving part formed in a curved shape so as to be in point contact with a mounting surface at a lower center of one side of one side of the body perpendicular to the concave part and the convex part; A second support part protruding in a curved shape so as to be in point contact with the mounting surface at one side of the lower part of the other side (opposite side) of the side surface of the body perpendicular to the concave part and the convex part; And a second protruding portion formed in a curved shape so as to be in point contact with another side of the other side (opposite side) of the side surface of the body perpendicular to the recess and the convex portion, The present invention also provides a trench cover which is characterized in that it is employed with three support portions.

Accordingly, the present invention is not only capable of freely adjusting the width and length of the trench cover so as to fit into the support frame while continuously connecting and connecting trench covers of one shape, and even if the installation state is inclined obliquely, It is possible to minimize the occurrence of noise such as rattling or collision with another adjacent trench cover.

Further, in a preferred embodiment of the present invention, the body of the trench cover is inserted into the hooks so as to prevent the body of the trench cover from contacting with each other, and is elastically deformed by elasticity to absorb and mitigate impact, And at least one packing having a plurality of dimples formed at regular intervals so as to be elastically brought into close contact with each other by elasticity when brought into contact with a surface facing at least one side surface thereof, The one trench cover and the other trench cover are more tightly and stably brought into close contact with each other, thereby making it possible to maintain a rigid mounting state without easily wobbling or moving, thereby preventing noise from being generated by external force.

Further, in a preferred embodiment of the present invention, a circular mounting groove is formed on the upper surface of the body, the drain hole is formed in the mounting groove so as to pass through the mounting hole, a pin hole is formed at the center of the mounting groove, A plurality of stopper engagement holes are formed at predetermined intervals in a radially inner part of the drain hole and a bottom surface of the mounting groove in a radial direction around the pin hole and inserted into the mounting groove to adjust the size of the drain hole A shaft hole is formed in the center of the shaft hole so as to be rotatably connected to the pin hole and the connection pin at the center, and the shaft hole is radially formed around the shaft hole, A plurality of through holes communicating with or through the drain hole are formed, and a contact hole And a stopper for causing the pedestrian to collide with the seat back, thereby preventing the back of the high heel of the pedestrian from falling into the drain hole or getting caught in the drain hole.

A preferred embodiment of the present invention also includes a return spring that is fitted to a lower portion of the connection pin and maintains the inserted state of the adjusting plate in the mounting groove of the body and provides an elastic restoring force to return to the original position with respect to the body. So that the operation of rotating the throttle plate is simple and easy, and the convenience of use can be improved.

According to an embodiment of the present invention, which has the means and construction for solving the above-mentioned object and the technical object, it is possible to freely adjust the width and the length to fit into the support frame, In addition, it is possible to repeatedly connect a plurality of connection positions so as to form a specific pattern by slightly varying the width, thereby maximizing the width adjustment range.

In addition, since the load and the supporting force are concentrated on the first to third receiving portions located in three directions and the first to third receiving portions are formed in a curved or semi-elliptical shape so as to be in point contact with the receiving frame, It is possible to maintain a stable and stable installation state, thereby minimizing the occurrence of rattling or noise due to external forces such as friction or impact.

In addition, since the packing is sandwiched between one trench cover and another trench cover, the connection state is tightly and stably contacted without flow, and the impact force between the trench covers is naturally absorbed and buffered. have.

Further, since the size of the drain hole can be arbitrarily adjusted according to the rotation angle of the throttle plate, it is possible to effectively prevent the heel of the high heel of a pedestrian from falling into the drain hole or to prevent it from being stuck in the drain hole. Can be maximized.

Here, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing an example of a trench cover according to a conventional technique.
2 is a perspective view showing another example of a trench cover according to a conventional technique.
3 is a perspective view illustrating a trench cover according to an embodiment of the present invention.
4 is an enlarged cross-sectional view showing a trench cover according to an embodiment of the present invention.
5 is a perspective view illustrating a trench cover according to an embodiment of the present invention.
6 is a side view showing a trench cover according to an embodiment of the present invention.
7 is a plan view illustrating a state in which trench covers are continuously connected according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described more specifically with reference to the accompanying drawings.

Prior to this, the following terms are defined in consideration of the functions of the present invention, and they are to be construed to mean concepts that are consistent with the technical idea of the present invention and interpretations that are commonly or commonly understood in the technical field of the present invention.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In addition, when a part includes an element, it does not exclude other elements unless specifically stated otherwise, but may include other elements.

3 to 7, the trench cover according to the embodiment of the present invention mainly includes a body 10, a hook 20, an engagement hole 30, first to third support portions 40 and 50, (60), a packing (70), a throttle plate (80), and a return spring (90).

Here, the upper surface of the body 10 is divided into a portion where the drain hole 13 is formed and a portion where the first to third receiving portions 40, 50 and 60 are formed, The edge perimeter is defined as the side.

The body 10 is formed into a rectangular square-like shape having a lower surface when viewed in a plan view.

In other words, side surfaces having a predetermined height and thickness are formed on the four corners of the body 10, and a space is formed inside the bottom surface of the body 10 by the side surfaces thereof.

One side of the body 10, that is, the side in the width direction as viewed in a rectangle, is formed as a concave portion 11 recessed inwardly. The other side (opposite side) As shown in Fig.

In order to ensure smooth drainage, upper and lower drainage holes 13 are formed at predetermined intervals on the upper surface of the body 10, preferably by setting one orthogonal axis on the plane, Respectively. At this time, the orthogonal axis forms the center of the pin hole 15.

It is needless to say that a number of non-slip projections (not shown) for preventing slippage may be formed on the upper surface of the body 10 at predetermined intervals in a predetermined pattern.

The side surface of the body 10 in the longitudinal direction is spaced from the side surface of the support frame F by tight contact with the opposite side surface of the support frame F, A plurality of protrusions 17 are formed at predetermined intervals so as to prevent the protrusions 17 from being moved in the width direction by an external force in a state that the protrusions 17 are inserted into the support frame F.

For example, when the body 10 is not inserted into the support frame F because the width of the support frame F is smaller than the longitudinal width of the body 10 due to errors or deformation such as the installation conditions, design tolerances, The respective clearance protrusions 17 are grinded to correspond to the width of the support frame F by using a grinding tool such as a string or a grinder.

A plurality of circular mounting grooves 14 are formed on the upper surface of the body 10. A drain hole 13 is formed in the mounting groove 14 so as to communicate with the upper and lower sides.

A plurality of drain holes 13 are formed radially around the pin holes 15 at the center of the mounting groove 14 and a plurality of drain holes 13 And stopper hooking holes 16 are formed at a predetermined distance on the bottom surface of the mounting groove 14 so that the stopper 84 of the adjusting plate can be selectively engaged.

That is, the mounting groove 14 is recessed at a predetermined depth from the upper surface of the body 10, and a plurality of drain holes 13 are radially formed around the pin hole 15. The stopper latch holes 16 are formed in the drain hole 13 and the bottom surface in the mounting groove 14 are formed at regular intervals, preferably at intervals of 45 degrees with the pin hole 150 as the center.

Needless to say, a rib or a stiffener may be integrally formed inside the bottom surface of the body 10 to reinforce strength and increase rigidity.

In addition, it is preferable that the body 10 is formed to be convexly curved at a predetermined curvature gradually from both edge portions to the center portion of the upper surface.

Since the contact area with various objects such as wheels of a vehicle is minimized by the curvature of the body 10, frictional noise due to mutual contact can be greatly reduced and the load applied from the vehicle can be dispersed to improve durability have.

In addition, since the upper surface of the body 10 is formed as a convexly protruding shape, when painting a paint to paint a notice of danger or attention to the surface of the body 10, the function of the speed- Can be implemented.

The hooks 20 are paired with the recesses 11 of the side surfaces of the body 10 for interconnecting with the engagement holes 30 of the other trench covers and are lower than the upper surface of the body 10, (40), (50), and (60).

That is, the hooks 20 are inserted into the space inside the body 10 through the engagement holes 30 formed with the other trench covers C2 arranged adjacent to each other, and the other trench covers C2 To be engaged with the body 10 of the body 10.

Here, the hook 20 may protrude from the side surface of the body 10 in an " a " shape.

It is preferable that the hook 20 is formed to be inclined so as to be gradually narrower toward the lower part so as to connect the one trench cover C1 and the other trench cover C2 more easily.

On the other hand, the trench covers disposed at both edges in the longitudinal direction of the support frame F can be inserted into the support frame by cutting the hooks 20 using a cutting tool such as a hacksaw or a grinder.

The hooking hole 30 is formed in the side surface of the body 10 so that the hook 20 of the other trench cover arranged adjacent to the hooking hole 30 is inserted into the inner space of the body 10 to be engaged, That is, on the convex portion 12 so as to correspond to the hook 20.

The catching hole 30 is formed as a straight hole whose length in the longitudinal direction is slightly shorter than the length of the longitudinal portion of the hook 20.

Here, the hooking hole 30 is formed so that the hooking hole 30 of the other trench cover disposed adjacent to the hooking hole 30 has a height higher than the height of the upper end of the hooking hole 20 so that the hooking hole 20 of the other trenching cover 20 can be easily inserted and guided into the inner space of the body 10 It is preferable that the width is formed to be larger than the length in the horizontal direction and the flow can be minimized in the state where the hook 20 of another trench cover is inserted.

The first support part 40 is provided on the side of the body 10 perpendicular to the concave part 11 and the convex part 12, that is, the mounting face of the support frame F at the lower center of one side of the side face in the longitudinal direction (Semi-elliptical) so as to be in point contact.

The second support portion 50 is provided with a support frame F on one side of the lower side of the sides of the body 10 perpendicular to the recess 11 and the convex portion 12, (Semi-elliptical) so as to be in point-contact with the mounting surface of the main body.

The third receiving portion 60 is provided on the lower side of the other side (opposite side) of the sides of the body 10 perpendicular to the concave portion 11 and the convex portion 12 at a predetermined distance from the second receiving portion 50 (Semi-elliptical) so as to be in point contact with the mounting surface of the support frame F on the other side.

That is, the first to third receiving portions 40, 50, and 60 are arranged in a triangular shape so as to maintain a state in which the receiving surface of the receiving frame F is more stable and balanced, (Point) of the bottom surface of the base 10.

Since the load and the supporting force of the body 10 are concentrated only in the three directions by the first to third receiving portions 40, 50 and 60, the portion which always contacts the receiving frame F is minimized, So that the body 10 can be maintained in a stable state without rocking or displacement even if one of the sides of the body 10 is tilted obliquely with respect to the other body 10, It is possible to prevent lifting phenomenon that occurs when an unbalanced contact occurs with the contact portion F, as well as to minimize the occurrence of friction noise such as fluctuation due to external force and fluctuation or rattling.

The packing 70 prevents the body 10 of one trench cover C1 and the body 10 of the other trench cover C2 from directly contacting each other. And is formed of an elastic material such as rubber that absorbs and absorbs impact while being elastically deformed by elasticity.

At least one side surface of the packing 70 is formed with a plurality of dimples 71 at regular intervals so as to be resiliently and smoothly adsorbed and closely adhered by the elasticity in contact with the opposite surface.

The packing 70 minimizes the noise caused by the collision between one trench cover C1 and the other trench cover C2, and adjusts the spacing between the adjacent trench covers by overlapping and inserting several pieces of the packing 70 It plays a role.

The adjustment plate 80 is inserted into the mounting groove 14 so as to adjust the size of the drain hole 13 according to the rotation operation.

The throttle hole 82 is formed in the center of the throttle plate 80 so as to be rotatably connected by the pin hole 15 and the connecting pin 81. The throttle hole 82 is formed in the center of the throttle hole 82, Respectively.

The throttle plate 80 is formed with a plurality of through holes 83 which are radially shifted from the drain hole 13 in accordance with the rotational angle about the connecting pin 81 as a center axis about the shaft hole 82, And a stopper 84 for selectively interfering with the stopper latch hole 16 at a predetermined angle to cause contact interference is integrally formed on the lower surface.

Here, the connecting pin 81 may be composed of a bolt and a nut so as to be easily attached to the throttle plate 80, and the through hole 83 may be formed by setting one orthogonal axis on the plane and thereby dividing into four parts . At this time, the orthogonal axis forms the center of the shaft hole 82.

The outer diameter of the throttle plate 80 is slightly smaller than the inner diameter of the mounting groove 14 and the size of the shaft hole 82 is slightly larger than the outer diameter of the connecting pin 81, The engagement state between the body 10 and the body 10 can be released more easily, and the rotation of the control plate 80 relative to the body 10 can be performed more quickly and easily.

The return spring 90 urges the connecting pin 81 to maintain the inserted state of the throttle plate 80 in the mounting groove 14 of the body and to provide an elastic restoring force so as to quickly return to the original position with respect to the body 10. [ As shown in Fig.

That is, the return spring 90 continuously pushes the throttle plate 80 to be inserted into the mounting groove 14 by the compressive force and the tensile force, and even when the throttle plate 80 is lifted off the mounting groove 14, The resilient returning of the regulating plate 80 prevents the regulating plate 80 from being rotated freely so that the drain hole 13 and the through hole 83 of the regulating plate can be shifted or communicated with each other.

Here, the return spring 90 is made of a material such as spring steel. When the pushing force is applied, the return spring 90 is compressed. When the force is released, the return spring 90 returns to its original state. In other words, It is preferable to use a compression coil spring for quickly returning to a position or a state. However, it is not limited to this, and any one may be used as long as it has the same effect as the principle of resisting the force to be compressed.

On the other hand, the trench cover according to the embodiment of the present invention includes a spherical graphite cast iron (Ferrum Casting Ductile) having excellent tensile strength, elongation and the like, excellent vibration and impact absorbing ability, It is preferable to integrally form casting or casting with the same cast iron or alloy. However, the present invention is not limited to this. For example, it is possible to use a cast iron material such as a metal material, a roiied steel, It can be molded and processed into materials.

The trench cover according to the embodiment of the present invention configured as described above is constructed such that a plurality of recesses 11 are disposed so as to face each other and the convex portions 12 so as to be continuously connected to each other, Can be freely adjusted.

7, the hook 20 formed on one trench cover C1 is guided to the inner space of the body 10 through the hook hole 30 formed in the other trench cover C2 facing the hook cover 20. As shown in Fig. It is possible to easily maintain the connection state between the hooking holes 30 and 30 and to release the hooking holes 20 from the hooking holes 30 in the reverse order.

The connection clearance between one trench cover C1 and the other trench cover C2 can be freely adjusted by fitting the number of the packing 70 to the hook 20 in a different number, Or assembling tolerance, the worker can flexibly and easily adapt and apply in the field so that the installation work is very simple and easy, which can greatly improve productivity and productivity as well as efficiency of the work.

The load and the supporting force are concentrated by the first to third receiving portions 40, 50 and 60 and the first to third receiving portions 40, 50 and 60 are arranged on the mounting face of the receiving frame F, Even if the support frame F is nonuniform or inclined, it is possible to maintain a more balanced and stable installation state. As a result, it is possible to suppress the rattling due to an external force such as friction or impact, or the noise The occurrence can be minimized.

Furthermore, since the operator can arbitrarily adjust the size of the drain hole 13 by lifting the adjusting plate 80 by rotating the adjusting plate 80 with a separate tool or the like, it is possible to effectively prevent the heel of the high heel of the pedestrian from falling into the drain hole 13 And maximizes the drainage efficiency by maximizing the size of the drain hole 13 during heavy rain or heavy rains.

In other words, as shown in FIG. 7, when the throttle plate 80 is normally rotated as in the case of "C1", the size of the drain hole 13 can be minimized so that the heel of the high heel is not slipped or caught. The size of the drain hole 13 can be maximized by rotating the control plate 80 like " C2 ".

4, when the adjusting plate 80 is lifted upward, the restraint state between the stopper 84 and the stopper latching hole 16 is released and can be freely rotated at a predetermined angle.

At this time, the return spring 90 is compressed between the lower surface of the body 10 and the connection pin 81, and when the stopper 84 is positioned on the other stopper hole 16 of the mounting groove, 80 are naturally lowered into the mounting groove 14 and at the same time the stopper 84 is restrained by contact interference with the other stopper engagement hole 16 of the mounting groove, State can be maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments or constructions. Various changes and substitutions may be made without departing from the spirit and scope of the invention. The present invention may be applied to a wide variety of modifications.

For example, it is apparent to those skilled in the art that the present invention may be applied to a grating, which is a grid-like steel structure used for a lid of a drain hole.

Therefore, it is to be understood that modifications and variations of the features of the present invention are intended to be included within the spirit and scope of the present invention.

10: Body 11: Lumbar
12: convex portion 13: drainage hole
14: mounting groove 15: pin hole
16: stopper latch hole 17: clearance projection
20: hook hook 30:
40: first receiving portion 50: second receiving portion
60: third receiving portion 70: packing
71: dimple 80: throttle
81: connecting pin 82: soccer yoke
83: through hole 84: stopper
90: return spring

Claims (4)

A body having one side formed as a concave portion and the other side (opposite side) formed of a convex portion corresponding to the concave portion and having a plurality of drain holes vertically communicating on an upper surface thereof;
A pair of hooks protruding from the concave portions of the side surfaces of the body;
A pair of hooks formed to correspond to the pair of hooks on the convex portion among the side surfaces of the body and to hold the hooks of the adjacent trench covers inserted into the inner space of the body so as to engage with each other;
A first receiving part formed in a curved shape so as to be in point contact with a mounting surface at a lower center of one side of one side of the body perpendicular to the concave part and the convex part;
A second support part protruding in a curved shape so as to be in point contact with the installation surface at one side of the lower part of the other side (opposite side) of the side surface of the body perpendicular to the concave part and the convex part; And
(3) formed in a curved shape so as to be in point contact with the mounting surface at another side of the lower part of the other side (opposite side) of the side surface of the body perpendicular to the concave part and the convex part at a predetermined distance from the second receiving part A support portion;
.
The method according to claim 1,
The body of the trench cover is inserted into the hooks so as to prevent the body of the trench cover from contacting with each other. The body is resiliently deformed by elasticity to absorb and alleviate impact, and the lower portion can be opened At least one packing formed of an elastic material and formed with a plurality of dimples at regular intervals so as to be elastically brought into close contact with each other by elasticity when brought into contact with a face opposed to at least one side face;
Further comprising a trench cover.
3. The method according to claim 1 or 2,
Wherein a plurality of circular mounting grooves are formed on an upper surface of the body, the drain holes are formed in the mounting groove so as to pass through the upper and lower portions,
Wherein a plurality of stopper engagement holes are formed at a predetermined interval in a part of an inner circumferential surface of the drain hole and a bottom surface of the mounting groove in a radial direction about the pin hole,
A shaft hole is formed in the center so as to be rotatably connected by the pin hole and the connecting pin, and the shaft hole is formed in the center of the shaft hole, Wherein a plurality of through holes are formed in a radial direction with respect to a rotation angle of the connection pin as a center axis, and the stopper is selectively engaged with the stopper engagement hole at a predetermined angle to cause contact interference, Formed throttle;
Further comprising a trench cover.
5. The method of claim 4,
A return spring that is fitted to a lower portion of the connection pin to maintain a state in which the adjustment plate is inserted into the mounting groove of the body and to provide an elastic restoring force so as to return to the original position with respect to the body;
Further comprising a trench cover.

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