KR20150093547A - Trench cover - Google Patents

Abstract

The present invention provides a trench cover which can be conveniently and easily installed, and capable of minimizing flow and noise generation caused by friction or impact. According to the present invention, the trench cover comprises: a body in the form of one between a triangle and a right-angled triangle whose one side is a hypotenuse as viewed in a plane, and including multiple drain holes in an upper surface; multiple engagement holes formed in a lateral surface on a hypotenuse when viewed in a plane among lateral surfaces of the body; an engagement ring formed in a lateral surface on a hypotenuse when viewed in a plane among lateral surfaces of the body, and formed to be inserted and engaged in the engagement hole formed in a lateral surface on a hypotenuse when viewed in a plane among lateral surfaces of the other trench cover body point-symmetrically arranged; at least one inclined surface in a lateral surface between the engagement ring and the engagement hole of the body, and formed at an incline to come close from the upper part to the lower part with the other trench cover body point-symmetrically arranged; and at least one locking lever formed to allow a width to be narrower from the upper part to the lower part in order that a gap between the body and the other trench cover body is spread apart while being lowered along the gap between the inclined surface and the inclined surface of the other trench cover body point-symmetrically arranged.

Description

Trench cover {TRENCH COVER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trench cover provided on an upper portion of a trench for drainage and collection of rainwater and domestic wastewater. More specifically, the trench cover can be easily and easily installed regardless of deformation of the trench frame, The present invention also relates to a trench cover which can minimize the occurrence of flow and noise due to friction or impact and can also function as a speed limiter.

Generally, a trench such as a drainage duct or a collecting channel, which is a facility for draining and collecting rainwater or sewage, is installed at an outdoor edge of a roadside or various buildings, including entrance and exit of a parking lot, Or a so-called trench cover for preventing wheels or other dirt from falling into or entering the vehicle.

FIG. 1 shows an example of a trench cover according to the prior art (Korean Utility Model Publication No. 0342685), in which ribs 11 are repeatedly formed on both side surfaces of a body 10, A concave portion 12 and a convex portion 13 for connecting to other trench covers are formed at both ends and a connecting hole 16 is formed inside the concave portion 12 and the convex portion 13, Or the convex portions can be connected to each other with the bolts 15 and the nuts correspondingly.

However, in the conventional trench cover as described above, one trench cover and another adjacent trench cover are in close contact with each other, and the recessed portion 12 and the convex portion 13 formed on both sides of the trench cover are coupled to each other with bolts 15 and nuts Since the trench frame must be seated and assembled on the trench (supporting the trench cover and functioning as drainage), it takes much time and labor to connect and install.

In addition, since the concave portions 12 on both sides are in close contact with the convex portions 13 of other adjacent covers when the plurality of trench covers are continuously connected, 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 the trench frame, a machining error, and an assembly tolerance caused by the environment.

In addition, 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 trench frame, so that it is loose when it is installed in a place where the influence of external force is frequent, There is a problem that it easily flows and shakes while causing collision and friction noise.

Furthermore, the bolts (15) and the nuts for connecting the trench covers are easily deformed by the upward and downward bi-directional stresses, and 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, in the conventional trench cover as described above, when a plurality of trench covers are continuously connected to each other, one trench cover and another type of trench formed symmetrically with respect to the connection fixing portion 10 and the connection fixing portion 20 Since the cover is arranged to be shifted from each other and the corresponding connection fixing portion 10 and the connection fixing portion 20 are coupled to each other, the pair of trench covers must be provided in pairs, It is impossible to flexibly cope with the deformation of the trench frame due to the limitation of the installation place or the condition and the gap due to the machining error or the assembly tolerance.

In addition, because the main body 1 is formed as a flat plate of a regular triangle shape, the portion contacting the trench frame is widened at a wide angle, or a gap is generated. As a result, There is a problem that when installed, it easily flows and rattles, causing collision and friction noise.

In addition, when a plurality of trench covers are continuously connected to each other, it is not possible to arrange the trench cover at the end of the trench cover perpendicularly to the trench frame, so that a separate finishing trench cover needs to be additionally provided. There is.

On the other hand, in the case of the trench cover installed at the entrance of the ground or underground parking lot, the top surface is formed in a convex form so as to use the function and the excuse of the speed braking tackle for preventing the traveling speed of the passing vehicle, And to reduce the risk of accidents.

In order to ensure sufficient visibility for the driver to easily recognize at night, etc., the trench cover having the overspeed protection function is painted on the surface by using a reflective paint. At this time, regarding the connection direction of the trench cover It is necessary to paint in the form of a parallelogram having a width of 45 to 50 cm at an angle of 45 ° and the shape characteristic of the trench cover in which a large number of drain holes are formed for smooth drainage and the spatial restriction of the installation place, There is a lot of inconvenience in the installation work such as the inevitable.

Korean Patent Publication No. 10-2009-0094688 (2009.09.08) Korean Registered Patent No. 10-0551591 (Feb. 23, 2006) Korean Registered Patent No. 10-0597032 (2006.07.04) Korean Registered Patent No. 10-0669922 (January 16, 2007) Korean Utility Model Registration No. 20-0342685 (Feb. 10, 2004)

Accordingly, the present inventors have focused on solving the above-mentioned problems and solving the problems, so that even if the trench frame is distorted or deformed due to various conditions such as constraints and conditions of the installation place, or has assembly tolerance or processing error with the trench cover It is possible to minimize the occurrence of rattling and noise due to friction or impact, and to develop a trench cover capable of more effectively obtaining the function and the excitation of the speed limiter. As a result, the present invention has been completed.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a trench cover which is easy to install and which can be easily, firmly, and stably installed.

It is another object of the present invention to provide a trench cover that minimizes the flow and noise generated by an external force and effectively implements the overspeed protection function.

According to an aspect of the present invention, there is provided an image forming apparatus including: a body having a shape of a rectangle or a right triangle having one side viewed in a plan view and having a plurality of drain holes on an upper surface thereof; A plurality of side surfaces of the side surfaces of the trench cover body which are formed on side surfaces of the side surface of the hypotenuse when viewed on a plane among the side surfaces of the body, The body of the other trench cover being disposed in a point symmetrically with respect to the body of the trench cover, the body of the trench cover being formed at least on the side between the engagement hole and the engagement ring of the body, An inclined surface formed so as to be gradually inclined toward the lower side, And at least one locking lever formed so as to be gradually narrowed from the upper side to the lower side so as to open between the body and the body of the other trench cover while descending along the inclined surfaces of other trench covers Present the cover.

In the present invention, the locking lever is inserted between the one trench cover and the other trench cover point-symmetrically connected in a forced fit manner to generate a strong contact force with the side surfaces of the trench covers, thereby changing the installation width between the pair of trench covers It is possible to securely and stably install the trench on the trench frame.

In addition, since a plurality of trench covers fabricated in one shape can be continuously connected to the trench frame, the operation can be simplified and facilitated.

In a preferred embodiment of the present invention, each of the legs may be formed at the vertex of the bottom surface of the body when viewed on a plane.

As a result, the contact between the support leg and the trench frame is more tightly and stably carried out, so that the mounting posture can be maintained without being easily moved after the installation.

In another preferred embodiment of the present invention, the inclined surface comprises first and second inclined surfaces formed at regular intervals on side surfaces of the hypotenuse when viewed on a plane among the side surfaces of the body, Wherein an axis passing hole is formed in a side surface of the hypotenuse when viewed on a plane of the side surface and a side surface of the other trench cover which is formed in a side of the hypotenuse when viewed on a plane among the side surfaces of the body adjacent to the second inclined surface, A lever shaft is protruded to be inserted into an axial passage hole formed in a side surface of the hypotenuse when viewed in a plane of the side surface, and a locking hole may be formed so that the locking lever is engaged with the lever shaft in a pin joint manner.

Accordingly, the present invention can more firmly and stably maintain the state of engagement between one trench cover and another trench cover, thereby preventing the locking lever from being unintentionally separated from and separated from the body, When the reflective cover is painted or the trench cover painted by dividing into two colors such as black and yellow is connected at a certain interval to each other, it is painted in a parallelogram shape having a certain width naturally due to the connecting portion due to the hypotenuse of the side surface of the body So that the function of the speed limiter can be effectively obtained.

In another preferred embodiment of the present invention, the locking lever is coupled to the lever shaft of the body in a pin-fitting manner, so that the turning operation about the lever axis is simple and easy, thereby improving the ease of use.

The present invention having the means and configuration for solving the technical problems as described above can provide a continuous connection by using only one type of trench cover so that the installation work is simple and easy, Since the load and the supporting force are concentrated on the supporting leg located in the direction, the contact with the trench frame is more balanced and stable, so that it is not easily moved after the installation and the mounting state is firmly maintained. It is possible to minimize the occurrence of rattling or noise.

In addition, the present invention can be applied to a trench cover by pushing a trench cover with a strong contact force by inserting the trench cover in an interference fit manner by applying an external force between the trench cover and another trench cover which is point- The mounting width between the pair of trench covers can be varied, and at the same time, the trench covers are stably and stably installed on the trench frame by the force of opening the sides of the respective bodies so that the sides of the bodies are tightly fixed to both wall surfaces of the inside of the trench frame. State can be maintained.

Therefore, the present invention is very simple and easy to install, since the operator can flexibly and easily apply and apply in the field without being disturbed by the circumstances and circumstances of the installation site and the design error and assembly tolerance with the trench frame, It is possible to obtain a special and advantageous effect of minimizing the occurrence of noise and vibration by maintaining a stable and stable installation state because it does not easily flow in the width direction and up and down direction even when subjected to impact.

In addition, since the present invention is divided into two colors such as black and yellow, and painted and then connected at a predetermined interval, the shape and arrangement of the surface painted with a parallelogram having a constant width like a speed limiter can be naturally produced It is possible to realize and obtain the function of the overspeed inhibiting jaw.

1 is a structural view showing an example of a trench cover according to a conventional technique.
2 is a structural view showing another example of the trench cover according to the conventional technique.
3 is a perspective view illustrating a trench cover according to an embodiment of the present invention.
4 is a perspective view showing another trench cover arranged in a point-symmetrical manner on a trench cover according to an embodiment of the present invention.
5 is a bottom perspective view showing another trench cover connected to a trench cover according to an embodiment of the present invention in point-symmetry.
6 is a side view showing a state in which a trench cover is installed in a trench frame according to an embodiment of the present invention.
7 is a plan view showing a state in which a trench cover is installed in a trench frame according to another embodiment of the present invention.
8 is a plan view showing a state in which a locking lever is pressed and inserted between slanted surfaces in a state where a trench cover according to another embodiment of the present invention is installed in a trench frame.

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.

Herein, the attached drawings are exaggerated or simplified in order to facilitate understanding and clarification of the structure and operation of the technology, and it is to be noted that each component does not exactly coincide with the actual size.

In the following description, the portion where the non-slip protuberance is formed is defined as the upper surface of the body, the opposite direction thereof, that is, the portion where the foot leg is formed is defined as the lower surface and the portion where the spacing adjustment projection is formed is defined as the side surface.

3 and 4, the trench cover according to the embodiment of the present invention mainly includes a body 100, a retaining hole 110, a retaining ring 120, an inclined surface 130, and a locking lever 140 .

The body 100 is formed in a shape of either a rectangle or a right triangle having a hypotenuse on one side when seen in a plan view, and side surfaces having a predetermined thickness are formed at rim portions such as a hypotenuse, a vertical side, and a base .

When the body 100 is viewed from the side, it forms a convexly curved shape at a predetermined curvature gradually toward the center portion of the upper surface from the lower edge of the base when viewed on the plane, and the opposite side of the hypotenuse .

A plurality of drainage holes 101 and drainage grooves 102 are formed on the upper surface of the body 100 at predetermined intervals so as to allow drainage to be smoothly performed. In addition, a slip prevention A plurality of protrusions 103 are formed at predetermined intervals.

That is, the upper surface of the body 100 minimizes the contact area with various objects such as the wheels of the vehicle due to the curvature thereof, so that the friction noise due to mutual contact can be greatly reduced, Durability can be improved.

In addition, since the upper surface of the body 100 is formed in a convexly protruding shape, if a paint having a danger or warning meaning is painted on the surface thereof, the function of the speed limiting protector can be obtained simultaneously in the entry / .

7 and 8, on the side surface of the body 100, a plurality of spacing adjusting projections 104 are formed at predetermined intervals so as to adjust the spacing when the trench frame F is installed .

For example, when the width of the trench frame F becomes smaller than the width of the body 100 due to errors or deformation such as the condition of the installation site or design tolerance, and the body 100 is not inserted into the trench frame F The respective spacing adjusting projections 104 can be easily and easily inserted by grinding to correspond to the width of the trench frame F by using a grinding tool such as a string or a grinder.

That is, the spacing adjusting protrusion 104 closely contacts with the opposite side face of the trench frame F to prevent the body 100 from flowing in the width direction by an external force in a state where the body 100 is inserted into the trench frame F .

Here, when the body 100 has a quadrangular shape with one side being a hypotenuse when viewed in a plane, the side of the side of the body 100 where the hypotenuse and the vertical side meet when viewed on a plane, It is preferable that the side surface is formed so as to have at least a short width or a length as compared with the side surface so that one side is closer to a triangle having a hypotenuse when viewed on a plane.

A rib or a stiffener may be integrally formed on the inner side of the bottom surface of the body 100 to reinforce strength and increase rigidity.

In addition, the support legs 150 protrude downward from portions of the bottom surface of the body 100 corresponding to the vertex positions when viewed on a plane.

5 and 6, the support leg 150 may be provided on the side surface of the body 100 such that the support leg 150 may be stably and balancedly mounted on the trench frame F, Are integrally formed on only three bottom surface portions where they meet each other.

Since the support legs 150 minimize the portion in contact with the trench frame F and the load and supporting force of the body 100 concentrate only in the three directions, the trench frame F tilts obliquely with respect to the ground It is possible to maintain the body 100 in a stable state without rocking and thus to prevent lifting phenomenon that occurs when the body 100 makes an unbalanced contact with the trench frame F, It is possible to minimize the generation of noise, such as rattling and the like.

Therefore, unlike the prior art, it flexibly responds to load or impact force and tightly adheres to prevent lifting phenomenon caused by unbalanced contact, and absorbs friction noise caused by shaking and rattling caused by external force It is not necessary to additionally provide a so-called shock absorbing pad between the bottom surface of the body 100 and the trench frame F. [

Here, when the body 100 has a quadrangular shape with a hypotenuse when the body 100 is viewed in a plane, the supporting leg 150 may be a side surface of the side surface of the body 100 where the hypotenuse and vertical sides meet, One of the sides of the side of the body 100 is formed to have a short width and a length and the other two sides of the side of the side of the body 100 where the hypotenuse and the base meet, It is preferable to form it at the corner portion of the side where the vertical side and the base side meet.

The latching hole 110 is formed on the side of the hypotenuse of the side surface of the body 100 in a direction perpendicular to the hypotenuse when viewed on a plane.

That is, the latching hole 110 is formed in a reverse trapezoidal shape when viewed from the side in a manner that the latching hole 110 communicates in both directions on the side surface lower than the upper surface of the body 100.

The latching ring 120 is integrally formed on the side of the hypotenuse of the side surface of the body 100 when seen in a plan view.

That is, the latching ring 120 is formed in an "a" shape like a shape protruding outward from both sides of a lower position than the upper surface of the body 100.

Here, the latching ring 120 corresponds to a plurality of latching holes 110 formed on side surfaces of the hypotenuse when viewed on a plane among the side surfaces of the body 100 'of another trench cover which is disposed in point symmetry with the hypotenuse side surface of the body 100 So as to be inserted and hooked.

In addition, the latching ring 120 is inserted into the latching hole 110 so that the body 100 and the body 100 'can be connected to each other in a state where the trench covers and the other trench covers, which are point- In the direction opposite to each other and in the width direction of the trench frame (F).

That is, the outer diameter of the engagement ring 120 is slightly smaller than the inner diameter of the engagement hole 110 so that the connection position between the engagement hole 110 and the engagement ring 120 can be freely adjusted or set. And the length is longer than the length of the latching hole 110.

Therefore, when another trench cover is to be connected to another trench cover in a point-symmetrical manner, the respective trench 120 formed corresponding to the side of the hypotenuse of the side of the body 100 ' When they are inserted into the engagement holes 1100 of the other trench covers facing each other, when they are pushed in opposite directions along the side of the hypotenuse of the sides of the bodies 100 and 100 ', mutual engagement can be maintained.

In order to release the connection between the retaining ring 120 and the retaining hole 110 of the other trench cover, the retaining ring 120 is pulled out from the retaining hole 110 of the other trench cover in the reverse order, The state can be released.

The inclined surface 130 is formed on at least one side of the side surface of the body 100 between the retaining hole 110 and the retaining ring 120.

That is, the inclined surface 130 is inclined from the upper edge of the body 100 toward the lower edge so that the inclined surface 130 is gradually closer to the body 100 'of the other trench cover disposed in a point-symmetrical manner.

Here, the inclined surface 130 may be composed of first and second inclined surfaces 131 and 132 formed at regular intervals on side surfaces of the hypotenuse when viewed on a plane among the side surfaces of the body 100.

That is, the first and second inclined surfaces 131 and 132 are formed symmetrically with respect to a center line perpendicular to the side surface on the side of the hypotenuse when viewed from above on the side surface of the body 100.

The locking lever 140 descends along the inclined surfaces 130 of the other trench covers disposed in point-symmetrical relation with the inclined surface 130 and moves downward from the upper side to open the space between the body 100 and the body 100 ' The width gradually becomes smaller.

That is, since both sides of the locking lever 140 are naturally lowered along the inclined surface 130 and are in intimate contact with each other, the contact between the pair of bodies 100 and 100 ' The side surface of the vertically extending portion is closely fixed to both wall surfaces on the inner side of the trench frame F. As shown in FIG.

Therefore, the contact distance between the body 100 (100 ') and the trench frame (F) can be selectively adjusted, so that the trench frame (F) can be easily and effectively applied without being affected by deformation, Even when receiving an external force, such as when the vehicle is passing, it is prevented from being separated or protruded from being lifted or lifted, thereby enhancing safety, and minimizing noise and vibration due to shaking, friction, and the like.

That is, since the connection position and the distance between one trench cover and another trench cover disposed in a point symmetrical manner can be easily changed, the installation width of the trench frame F can be easily adjusted, If the installation state is loose because the width of the frame F does not coincide due to the error of the installation condition or the design tolerance, the operator can freely and flexibly adjust and set the connection position between the trench cover and the trench frame F As shown in FIG.

The locking lever 140 may be formed so that its vertical height is lower than the vertical height of the inclined surface 130 so that the locking lever 140 does not protrude from the upper surface of the body 100 while being fitted to the inclined surface 130.

On the other hand, the locking lever 140 may be coupled to the body 100 in a pinned manner.

For this, an axial passage hole 160 is formed in a side surface of the hypotenuse when viewed on a plane among the side surfaces of the body adjacent to the first inclined surface 131, and the axial passage hole 160 is formed in the side surface of the body 100 adjacent to the second inclined surface 132 A lever shaft 170 is protruded from the side surface on the hypotenuse when viewed in plan view.

That is, the lever shaft 170 is formed so as to be inserted in correspondence with the shaft passage hole 160 formed in the side of the hypotenuse when viewed from the plane among the side surfaces of the body 100 'of another trench cover arranged in a point-symmetrical manner.

The locking lever 140 is provided with a shaft hole 141 to be engaged with the lever shaft 170 in a pin-fitting manner. On the side opposite to the shaft hole 141, A finger groove (142) is formed to allow the operator to firmly and stably contact the fingers during operation so that the operation is simple and easy.

Therefore, it is possible to prevent the locking lever 140 from being separated or protruded from the inclined surface 130 when the locking lever 140 receives frequent external forces due to the passage of the vehicle or the like in the installed state, So that the convenience of the operation of fitting it into the inclined surface 130 can be secured.

On the other hand, the body 100, the retaining hole 110, the retaining ring 120, and the inclined surface 130 are excellent in tensile strength, elongation and the like, and excellent in vibration and impact absorbing ability, It is preferable to cast and cast into a cast iron or alloy such as a ferrous casting duct, but it is not limited to this, but it may be formed of a material such as a metal material, a rolled steel, or the like. And may be processed.

Since the trench cover according to the embodiment of the present invention constructed as described above can be manufactured in a single shape and can be continuously connected and installed, the installation work is simple and easy, and not only efficiency of operation but also productivity can be greatly improved. As shown in FIG. 8, an external force is applied between the trench cover and another trench cover which is point-symmetrically connected to the trench cover by pressing or hitting the locking lever 140 at the same time as the rotation of the trench cover. The installation width of the trench frame F is adjusted and the trench covers are opened to firmly fix the side surfaces of the bodies 100 and 100 'to both wall surfaces inside the trench frame F .

Further, since the load and the supporting force are concentrated on the support legs 150 located in three directions, the contact with the trench frame F is more balanced and stable, so that the installation can be maintained without being easily moved after the installation.

In addition, when two colors are painted and then connected in a certain pattern at a certain interval, a parallelogram can be used to naturally produce a patterned array. Thus, the shape of the trench cover can be maintained, Functionality, and usability, so that the benefits can be obtained.

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. It can be changed to an embodiment.

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

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

100: Body 101: Drain
102: drainage groove 103: non-slippery projection
104: Spacing adjustment projection
110: latching hole 120: latching ring
130: slope surface 131: first slope surface
132: second inclined surface 140: locking lever
141: pinhole 142: finger groove
150: support leg 160: shaft passage hole
170: Lever shaft

Claims (6)

A body formed in any one of a quadrangular shape or a right-angled triangular shape with one side being a hypotenuse when viewed in plan and having a plurality of drain holes on its upper surface;
At least one locking hole formed on the side of the hypotenuse when viewed from the plane of the side surface of the body;
A hook formed on a side surface of the hypotenuse of the side surface of the body so as to be inserted in a corresponding one of the side surfaces of the hypotenuse when viewed on a plane among the body side surfaces of other trench covers arranged in a point-symmetrical manner;
At least one inclined surface formed on at least one side of the body between the retaining hole and the retaining ring and sloping downward from the upper side of the body of another trench cover disposed in a point-symmetrical manner so as to be gradually closer to the lower side; And
At least one locking lever formed to be gradually narrowed from the upper side to the lower side so as to spread between the bodies of the body and the other trench cover while descending along the inclined surfaces of other trench covers arranged point-symmetrically with respect to the inclined surface;
.
The method according to claim 1,
Wherein a trench cover is provided on each of the vertexes of the bottom surface of the body, when viewed on a plane, at each of the vertexes.
3. The method according to claim 1 or 2,
Wherein the inclined surface comprises first and second inclined surfaces formed at regular intervals on the side of the hypotenuse when viewed on a plane among the side surfaces of the body,
A shaft passing hole is formed in a side surface of the hypotenuse when viewed on a plane among side surfaces of the body adjacent to the first inclined surface,
And a second inclined surface that is formed on a side surface of the hypotenuse when viewed on a plane among the side surfaces of the body adjacent to the second inclined surface and corresponds to an axial through hole formed in a side surface on the hypotenuse of the side surface of another trench cover A lever shaft is protruded to be inserted,
Wherein the locking lever is provided with a shaft bushing to be coupled to the lever shaft in a pinned manner.
The method of claim 3,
Wherein the first inclined surface and the second inclined surface are formed symmetrically with respect to each other.
The method of claim 3,
Wherein one side surface of the locking lever is provided with a finger groove for facilitating and facilitating the rotation operation about the lever axis.
The method according to claim 1,
Wherein the locking lever is coupled to the body in a pinned manner.

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