KR200212753Y1 - Manhole cover assembly with multi-locking device - Google Patents

Abstract

The present invention relates to a manhole cover assembly having a plurality of locking devices.

The present invention is a manhole support frame 110 composed of a bottom portion 111, a vertical portion 112 and the inner surface protrusion 113; Manhole cover 120; The cover plate 131 hinged from the inside of the '' 'shaped border 133 protruding horizontally from the manhole cover 120 and the end of the cover plate 131 includes an arc formed while moving downward. A hinge 130 having a coupling groove 132 formed to a depth to which the coupling protrusion 115 of the end of the cover plate 131 is fixed to the inner surface protrusion 113; And a plurality of locking devices 140 coupled to and fixed to the manhole support frame 110 and the manhole cover 120 and formed at positions facing the hinge part 130.

The present invention promotes the safety of heavy vehicles and prevents foreign matters including earth and sand from accumulating in the coupling grooves so that they can be managed cleanly in appearance, and the opening and closing of the manhole cover is convenient when cleaning, checking and repairing the manhole.

Description

Manhole cover assembly with multi-locking device

The present invention relates to a manhole cover assembly having a plurality of locking devices. More specifically, by installing a plurality of locking devices in the manhole assembly to facilitate the opening and closing of the manhole cover when maintenance or inspection work inside the manhole is convenient, and in general, reduces the safety and noise of traffic of vehicles and pedestrians, There is a cover plate in the branch to prevent various foreign matter, including earth and sand to accumulate in the coupling groove relates to a manhole cover assembly that is convenient for cleaning, maintenance and management of the manhole cover.

Conventional manhole cover assembly is composed of a manhole cover and a manhole support frame for supporting the manhole cover, the top of the manhole support frame is installed at the same height as the road surface, by covering the manhole cover on top of the manhole support frame, manhole support Manhole installation work is completed without a separate means to prevent the separation of the frame and manhole cover. However, since the manhole cover and the manhole support frame are mainly made of heavy castings, when the heavy vehicle passes at a high speed, a strong negative pressure is generated and there is a risk that the manhole cover is separated. In fact, there have been accidents in which a car or a person falls into a manhole hole after the manhole cover is released from the coupling position due to physical force acting on the upper surface of the manhole assembly or backflow of sewage.

Manhole cover assembly with a conventional locking means has accumulated a variety of foreign matters including earth and sand accumulated in the groove of the hinge portion that rotates when opening and closing the manhole cover, the opening and closing operation is not smooth, there is a disadvantage inconvenient cleaning to remove the foreign matter.

In addition, the manhole cover is lifted or transported by inserting a pickaxe or a hook into a groove formed on one side of the lid upper surface because of the weight of the manhole cover made of cast iron in the conventional manhole cover assembly. The pickaxe has a shape suitable for moving the pickaxe blade into the groove formed in the manhole cover. However, when the pickaxe is inserted into the groove on the surface of the manhole cover, the angle between the pickaxe's bag and the ground is small so that the worker uncomfortably lowers the upper body. Because of the work, there is a risk of low back pain, and the edge of the blade is narrowed, so it is easily detached from the groove of the manhole cover, and the pickaxe bag is made of wood and the worker may be injured due to breakage. There is this. In addition, the hook is used when there are grooves on both sides of the manhole cover, and two workers lift the manhole cover from both sides. However, since hooks are made by bending one end of a rebar, such as a large diameter bar, the shape is not constant and the proper strength cannot be secured. There was a disadvantage that the risk of injuring the worker by dropping the manhole cover unbalanced.

The present inventors have developed a manhole cover assembly having a plurality of locking devices to solve the problems of the conventional manhole cover assembly.

It is an object of the present invention to provide a manhole cover assembly having a plurality of locking devices that closely couple the manhole cover so that the manhole cover does not escape from the manhole support frame even when the heavy vehicle passes or the sewage flows backward.

Another object of the present invention is to provide a manhole cover assembly having a plurality of locking devices that can be closely coupled to the manhole cover and the manhole support frame to reduce the noise.

1A is a plan view and a cross-sectional view of a locked manhole cover assembly.

Figure 1b is a plan view and a cross-sectional view showing a state of opening the manhole cover using the opening and closing rods.

2 is an enlarged plan view of the hinge portion of the manhole cover assembly.

3 is a sectional view taken along the line A-A of FIG. 2, where a is a detailed sectional view of the hinged portion of the hinged state of the manhole cover and b is a detailed sectional view of the hinged portion of the hinged state of the manhole cover.

4 is a plan view showing a frame of a manhole cover having two fasteners as an embodiment of the present invention, b is a cross-sectional view showing a horizontal projection of the manhole support frame.

5 is a perspective view of a horizontal projection of the clasp of the manhole cover and the manhole support frame, b is a cross-sectional view showing a combined state of the clasp and the horizontal projection.

Figure 6 is another embodiment of the present invention a is an enlarged plan view of the locking portion of the manhole cover, b is a cross-sectional view of the cc cc of the female lock, c is an elevation of the protrusion plate of the support frame, d is a view of the female lock and the support frame Detailed sectional drawing which shows the engagement state of a protrusion plate.

<Description of Major Codes in Drawings>

110: manhole support frame 111: expansion portion

112: vertical portion 113: inner projection

114: protrusion 115: coupling protrusion

117: elastic rubber packing 120: manhole cover

125: hole 130: hinge portion

131: cover plate 132: coupling groove

133: border 140: locking device

141: clamp 142: horizontal projection

143: vertical frame 144: locking jaw

145: protrusion 146: lock

148: concave arc surface 149: protrusion plate

150: opening and closing rod 151: protruding arc surface

The manhole cover assembly of the present invention consists of a manhole support frame 110, a manhole cover 120, a hinge portion 130, and a plurality of locking devices 140.

The manhole support frame 110 is composed of a bottom portion 111, a vertical portion 112, and an inner surface protrusion 113. The bottom portion 111 has a bottom portion extended in the horizontal direction to be seated and fixed to the upper portion of the manhole structure and a plurality of holes for anchor bolts are drilled, the vertical portion 112 is formed vertically in the bottom portion 111 and the upper portion The protruding portion 114 is formed toward the manhole cover, and the inner surface protruding portion 113 protrudes into the 'b' shaped manhole support frame and a jaw coupled to the elastic rubber packing 117 is formed at the end.

Manhole cover 120 is mainly used in a circular or rectangular shape, as a specific example of the manhole cover assembly of the present invention proposes a circular manhole cover.

The hinge portion 130 extends from the manhole cover 120 and covers the cover plate 131 hinged to the inside of the edge 133 formed in a 'c' shape and a coupling groove formed at a lower portion of the cover plate 131 ( 132). The cover plate 131 is an inverted 'A' shaped protrusion 114 formed at the upper end of the vertical portion 112 of the manhole support frame 110 and the ends of the cover plate 131 are engaged with each other and the cover plate At the end of the 131, a coupling protrusion 115 protruding downward is formed. The coupling groove 132 is formed to a depth including an arc formed while the end of the cover plate 131 moves downward when the manhole cover 120 is opened, and the coupling protrusion of the end of the cover plate 131 is formed. The manhole cover 120 is maintained open while the 115 is fixed by being caught by the inner protrusion 113. In addition, the cover plate 131 serves to prevent a gap from occurring while the manhole cover 120 is opened.

The locking device 140 is fixed to the manhole support frame 110 and the manhole cover 120 to be installed at least two with a predetermined interval based on the opposite position of the hinge portion 130 facing. Locking device 140 of the present invention has shown a specific embodiment installed in two places with a predetermined interval based on the position of the opposite side facing the hinge portion 130, will be described in accordance with Figures 4 and 5.

The locking device 140 is composed of a clamp 141 of the manhole cover 120 and the horizontal protrusion 142 of the manhole support frame 110.

Two fasteners 141 are protruded horizontally from the center of the vertical frame 143 protruding downward from the manhole cover 120, the end of the fastener 141 is concave in the center and protruding both sides 145 is formed, and the clamp 141 is formed of nodular cast iron. Spheroidal graphite cast iron, commonly called Doctile cast iron, is made of spheroidal graphite after solidification by inoculating Mg, Ca, Si, etc. in cast iron molten metal. Strength is 40 ~ 70kgf / mm2, elongation is 5 ~ 20%. The reason for the easy and loosening action is due to the material properties of the spherical graphite cast iron having a very good elongation. In this embodiment, the clasp 141 uses spheroidal graphite cast iron, but the strength and elongation is equal to or greater than that of the spheroidal graphite cast iron ( For example, engineering plastics) or steel.

The horizontal protrusion 142 is a horizontal frame of the support frame 110 that protrudes from the vertical portion of the support frame 110 toward the manhole cover 120, and the end of the horizontal protrusion 142 has a locking jaw 144. Is formed.

When the fastener 141 is coupled to the horizontal protrusion 142 of the support frame 110 to be engaged, the concave end of the fastener 141 and the horizontal protrusion 142 of the manhole support frame 110 are engaged with the fastener. 141 is caught by the locking step 144 of the horizontal protrusion 142 is fixed in close contact with the manhole support frame 110. As an embodiment of the present invention, as shown in FIG. 5A, when the two catches 141 of the manhole cover 120 are coupled to the two horizontal protrusions of the manhole support frame 141, they are interlocked with each other. The converged two clasps 141 interact with the horizontal protrusion 142 of the support frame, thereby increasing the mutual coupling force as compared with the case where there is one clasp. In the case of the manhole assembly having a plurality of the locking device, as the locking device is provided at the opposite side of the hinge part at an appropriate angle, a certain amount of distortion caused by the production characteristics during manufacturing does not affect the performance of the locking device.

Another embodiment of the locking device is described with reference to FIG. 6.

The locking device 140 is coupled to the female lock 146 of the manhole cover 120 and the protrusion plate 149 of the support frame 110.

The female lock 146 is formed in the manhole cover 120 and the surface facing the vertical portion of the support frame 110 is formed with a concave arc surface 148 with a predetermined curvature.

The protruding plate 149 is a plate shape formed vertically in the center and is formed in the vertical portion of the support frame 110 and the circular arc surface 151 of the same curvature so as to converge with the concave arc surface 148 of the female lock 146. ) Is protruded and engaged with the female lock 146 to be fixed. The protrusion plate 149 is formed of spring steel. Spring steel has higher elastic limit and fatigue limit than other steel, so it has good resistance to vibration, high load and cyclic load, and is prevented from corrosion by chromium (Cr) treatment. It is installed in India and is subjected to repeated loads several times, and has strong resistance to natural conditions such as snow and rain.

In order to open the locked manhole cover 120, it is preferable to use a pointed rod or opening rod 150.

In the present invention, a tri-rod-shaped opening and closing rod is shown in FIG. 1B as an embodiment.

Opening and closing rod 150 is inserted into the end portion of the plurality of holes 125 adjacent to each other formed in the surface side of the manhole cover 120 as shown in Figure 1b by a predetermined depth to the manhole cover 120 toward the hinge 130 Pulling out), the pulling force to the locking device 140 is distributed and transmitted, respectively, while the combined clamp 141 is separated from the horizontal projection of the manhole support frame 110, the manhole cover 120 is opened. Pushing the opening and closing rod 150 in the reverse order of the above is combined and fixed while the locking device of the manhole converged with each other by the weight of the manhole cover.

By providing a manhole cover assembly having a plurality of locking devices of the present invention, the manhole cover is not easily detached from the manhole support frame to be closely coupled to prevent breakage, and has the effect of preventing noise when the vehicle passes.

Claims (4)

Manhole support frame 110; Manhole cover 120; It extends from the manhole cover 120 is composed of a cover plate 131 inside the '' 'rim 133 and the coupling groove 132 formed in the lower portion of the cover plate 131, the cover plate 131 ) Is coupled to the protrusion 114 of the upper end of the vertical portion 112 of the manhole support frame 110 and the end of the cover plate 131 is engaged with each other, protruding downward from the end of the cover plate 131 Coupling protrusion 115 is formed, the coupling groove 132 is formed to a depth including an arc formed while the end of the cover plate 131 is rotated in the coupling groove 132 and the end of the Hinge 130, the coupling protrusion 115 is fixed to the inner surface protrusion 113; And, A plurality of locking devices 140 coupled to and fixed to the manhole support frame 110 and the manhole cover 120 and formed at positions horizontally opposite to the hinge portion 130; Manhole cover assembly having a plurality of locking devices comprising a. In claim 1, the locking device 140 of the manhole support frame 110 is fixed to the locking clasp 141 and horizontally protruding from the vertical frame 143 of the manhole cover 120 and the locking clasp 141 Consists of a horizontal protrusion 142, the clamp 141 is a protrusion 145 is formed at the end, the horizontal protrusion 142 of the manhole support frame is a manhole cover 120 in the vertical portion of the support frame 110 A latching jaw 144 is formed at an end of the horizontal frame as a horizontal frame of the support frame 110 protruding toward the support frame 110. When the manhole cover 120 is coupled to the manhole support frame 110, the clamping plate 141 is formed. A plurality of locking mechanisms, which are coupled to be fixed so as not to be separated from the support frame 110 by being caught by the locking jaw 144 of the horizontal protrusion 142 while the protrusion 145 and the horizontal protrusion 142 are engaged with each other. Manhole cover assembly with a lock. In claim 1, the locking device 140 is formed in the vertical portion of the female lock 146 and the support frame 110 protruding downward from the side of the manhole cover 120, the spring steel (spring steel) Consists of a protruding plate 149 formed in the shape, the female lock 146 is a surface facing the vertical portion of the support frame 110 in a portion protruding toward the bottom is formed as a concave arc surface 148 with a certain curvature The protruding plate 149 is formed in the vertical portion of the support frame 110 in a plate shape vertically elongated at the center, and has the same curvature so as to converge with the concave arc surface 148 of the female lock 146. A manhole cover assembly having a plurality of locks, characterized in that the lock surface is protruded and the locking device is coupled to and fixed to the female lock (146). In claim 1, a plurality of holes 125 are formed adjacent to each other at the surface side of the manhole cover 120 is inserted into the hole 125 at the same time to pull the manhole cover 120 toward the hinge 130 Manhole cover assembly having a plurality of locking devices further comprises an opening and closing rod (150) for opening and closing the manhole cover (120) by lowering or lowering.