KR100388946B1 - Manhole cover assembly with locking means - Google Patents

Abstract

The present invention relates to a manhole cover assembly with locking means.

The present invention support frame; Manhole cover; A ring portion 130 to which the support frame and the manhole cover are caught; And in the manhole cover assembly consisting of; a locking portion 140 for fixing and fixing the support frame and the manhole cover,

The locking portion 140 is installed in the lower portion of the manhole cover, the overall shape is circular and the cross section of the shape of the end of the long leg portion 141a and the short leg portion 141b converge on each other in the 'c' shape A female lock 141; And a support frame protrusion 142 extending from the support frame 110 and engaged with a space formed between the long leg 141a and the short leg 141b. It is a manhole cover assembly, characterized in that).

The present invention provides a manhole assembly having a locking means, the manhole cover is not released from the support frame even when heavy vehicles pass or sewage flows on the road surface, and the manhole support frame and the manhole cover are in close contact when the vehicle passes. It is possible to prevent damage, and also to obtain an effect of generating no noise.

Description

Manhole cover assembly with locking means

The present invention relates to a manhole cover assembly. More specifically, manholes are required for the inspection and repair of pipelines such as water and sewage pipes, communication pipes, etc., and noise may occur when heavy vehicles or people pass on the manhole cover from manholes installed in roadways or sidewalks. It must be closed unless it is to be opened for maintenance and repair. The present invention relates to a manhole cover assembly with locking means.

The manhole is usually made of a rectangle or a circle and consists of a structure in which a space is formed and a manhole cover assembly to allow a person to enter and work in the structure. The structure is installed at the site by installing formwork or placing concrete in advance in the factory and transporting it to the site for installation. The manhole cover assembly is installed on the upper portion of the structure, the manhole cover assembly is installed so as not to interfere with the traffic of the vehicle or person by maintaining the same height as the road surface.

Conventionally installed manhole cover assembly is composed of a cover (cover) and a support frame (frame) that can support the lid, the top of the support frame is installed at the same height as the road surface, simply covering the lid on the support frame The installation is completed. In other words, it is installed without a means for coupling the support frame and the lid. The manhole cover and the support frame are made of castings, so the weight of the manhole is heavy. Therefore, when a light vehicle is driving on the road, the lid may remain in place, but when a heavy vehicle passes at a high speed, such as a construction vehicle, there is a risk that the lid may be separated due to strong negative pressure, and it may actually be separated and cause injury to people and property. An accident is reported. Also, in case of manhole for sewer pipe, it is irrelevant if it is normal sewage flow, but when the sea level rises due to tsunami, flood, etc. Accidents such as falling have also occurred.

Manhole assemblies as shown in FIG. 1 are known to solve the problem caused by the lack of means for joining the support frame 10 and the lid 20. The manhole is composed of a ring portion 30 and a locking portion 40 as a coupling means, and is designed to maintain the position without the lid being separated even when a load acts in the opposite direction of its own weight. In other words, the hook of the hook portion and the trapezoidal weight of the lock portion is caught on the support frame and is not detached.

However, even in this manhole cover assembly, the coupling means of the lid and the support frame is structured so as not to be detached from the additional support frame of the inverted trapezoid, so that a certain distance is generated between the weight and the support frame. Therefore, when strong negative pressure and negative pressure occur periodically, noise may be generated and anxiety may be felt, and an inverted triangle may be additionally destroyed so that the manhole cover may be separated from the support frame, causing unexpected accidents. This is a risk factor because the lid and the support frame are not in close contact.

The inventor has developed a manhole cover assembly with locking means to solve the problems with the conventional manhole cover assembly.

It is an object of the present invention to provide a manhole assembly with locking means.

Still another object of the present invention is to provide a manhole cover assembly in which a manhole cover is not released from a support frame even when a heavy vehicle passes or a sewage flows backward on a road surface.

Still another object of the present invention is to provide a manhole cover assembly in which the manhole cover and the support frame are tightly coupled to reduce the risk of damage when the vehicle passes, and that noise is not generated.

Still another object of the present invention is to provide a support frame having an improved structure that can reduce the risk of breakage of the packaging material adjacent to the support frame.

1 is a plan view illustrating a manhole cover assembly according to the prior art, which is a plan view (a), an elevation view (b), a sectional view and a cross-sectional detail view (c).

2 is a partial cutaway plan view of a manhole as a first embodiment of the present invention.

3 is an elevation view of a manhole as a first embodiment of the present invention.

4 is an enlarged view of the A-A sectional view and the locking means portion of FIG.

5 is an enlarged view of the A-A sectional view and the hinge portion of FIG.

6 is a plan view of a manhole as a second embodiment of the present invention.

FIG. 7 is a sectional view taken along line B-B and a partially enlarged view of FIG.

8 is a plan view of a manhole as a third embodiment of the present invention.

FIG. 9 is a cross-sectional view and a partial enlarged view of C-C of FIG. 8.

10 is a plan view of a fourth embodiment of the present invention.

11 is a plan view of a fifth embodiment of the present invention.

12 is a sectional view and a partially enlarged view of an improved support frame.

Explanation of the main symbols in the drawings

110, 210: manhole frame 120, 220: manhole cover

130: ring portion 131: latch

132: jam step 133: space

140: lock portion 141: female lock

142: support frame protrusion 143: lock space

144: lock border 145: tap

211: bottom part 212: vertical part

213: base portion 214: extension portion

230: rotation preventing means 231: semi-circular projection

232: semicircular groove 241: hole for disassembly

251: elastic packing 340: magnetic lock

341: magnet 341: plate magnet

342: home

1 is a plan view illustrating a manhole cover assembly according to the prior art, which is a plan view (a), an elevation view (b), a sectional view and a cross-sectional detail view (c).

The manhole cover assembly of the prior art is composed of a support frame 10 and a manhole cover 20. Manhole cover 20 is coupled to the support frame 10 by the ring portion 30 and the locking portion 40 as shown in Figure 1c. Commonly used manhole cover assemblies are made fairly safe compared to simply mounting on a support frame without a coupling means.

However, this manhole assembly is formed between the upper end of the inverted triangle weight and the lower edge of the support frame because the lid 10 is mounted on the support frame 10 by self-weight so as not to be caught and detached from the inverted triangle additional support frame 10. There is a gap in. Therefore, when the negative pressure acts strongly and the lid is lifted up, the inverted triangular weight and the rim collide with the noise, and there is a risk that the locking part is easily broken by the impact.

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail in accordance with the embodiments shown in the accompanying drawings.

2 to 5 are diagrams showing a first specific example of the present invention.

The manhole assembly of the present invention is composed of a support frame 110, a manhole cover 120, a ring portion 130 to be supported by the support frame and the manhole cover, and a locking portion 140 for fixing the support frame and the manhole cover.

The ring portion 130 is formed under the locking jaw 132 protruding from the manhole cover and the locking jaw 132 protruding in the center direction from the recessed portion of the support frame 110 in the 'c' shape. 133. When the lid 120 is opened, the latch 131 is rotated in the space 133 so that the latching jaw 132 is caught by the lower portion and is no longer flipped to maintain its position.

Locking portion 140 is composed of a female lock 141 and the support frame protrusion 142 as shown in FIG. The female lock 141 is installed in the lower portion of the manhole cover 120 and is generally arc-shaped and has a cross-section of a 'c' shape in which the long legs 141a and the short legs 141b converge at each other. The cross section of the form. In the space made between the long legs and the short legs, the support frame protrusions 142 extending from the support frame 110 are engaged with each other and the ends of the long legs 141a are curved to be slippery to the outside. It is formed so as to slightly open toward the male and female easily coupled to the support frame protrusion 142 to be described later.

The female lock 141 is formed of nodular cast iron or ductile cast iron or spheroidal graphite cast iron. Spheroidal graphite cast iron, commonly referred to as ductile cast iron, is made of spherical graphite after solidification by inoculating Mg, Ca, Si, etc. in the cast iron molten metal. The strength is 40 to 70 kgf / mm 2 and elongation is 5 to 20%. The reason why the clasp can be locked and loosened in the present invention is due to the material properties of spheroidal graphite cast iron having a very good elongation. That is, because the elongation is good, the long leg 141a is moved to the left and right to be locked or released from the support frame protrusion. Therefore, in the present embodiment, the female lock is made of spherical graphite cast iron, but may be molded and used in a material (eg, engineering plastic) whose strength and elongation is equal to or greater than that of the nodular cast iron.

On the other hand, the locking portion of the support frame 110 to easily open the manhole cover is formed with a locking edge 144 in a 'c' shape and the locking portion space 143 which is a space surrounded by the locking edge 144 is Is formed. In addition, the lock part 145 protruding from the manhole cover is formed in the lock part of the manhole cover 120.

To open the manhole cover 120, put the pointed iron rod 146 into the lock space 143 surrounded by the lock rim 144, and when tilted down, the iron rod transmits the pushing force to the lock tap 145 and locks. The force transmitted to the subassembly 145 is transmitted to the female lock 141 installed in the lower portion of the manhole cover, pushing the long leg 141a, and thus the short leg 141b is lifted up. The female lock 141 is separated from the support frame protrusion 142.

The manhole cover 120 separated from the support frame protrusion 142 rotates about the ring portion of FIG. 3 so that the latch 131 is caught by the locking jaw 132 at the end.

When installing the manhole cover, follow the removal procedure described above in reverse order. That is, when the latch 131 is hooked to the hook portion of the already installed manhole support frame 110 and the lower portion is gradually rotated around the hook portion, the clasp 141 meets the support frame protrusion 142 and is long by the weight of the manhole cover. The leg part 141a is pushed down to the right, and the clasp 141 and the support frame protrusion 142 are engaged with each other. At this time, the end of the long leg portion is curved so that the support frame protrusion slides inwardly and is coupled to the male and female, so that the support frame protrusion is easily coupled by being slightly open to the outside, and the end of the support frame protrusion is also long It is curved to allow easy engagement by sliding inside the end of the leg, and is formed by being slightly retracted inward. Since the clasp has the material properties of the spherical graphite cast iron having a very high elongation as described above, there is an advantage that the clasp does not catch each other when the support frame protrudes. And since the elastic frame 251 is installed in the circular arc portion of the support frame 110 except for the ring portion and the lock portion, the self-weight of the manhole cover is pressed against the elastic packing, and the elastic packing acts to restore the original state. In conjunction with the unit 140 is coupled to each other so that no gap between the support frame and the manhole cover. Therefore, even if the vehicle passes over the manhole cover, there is no noise and the manhole cover is not separated even under strong negative pressure.

6 and 7 show a modification (second embodiment) of the present invention. In this variant, the conventional manhole is not provided with means for preventing rotation of the manhole cover when the manhole cover is installed on the support frame. Therefore, it was devised to solve the high risk of the manhole cover falling off the support frame when the load acts in the direction parallel to the plane of the manhole cover.

In the manhole assembly consisting of a support frame 210 and a manhole cover 220 and an elastic packing 251 installed between the support frame 210 and the manhole cover 220. The support frame 210 has a bottom portion 211 which is in contact with the structure and a vertical portion 212 which extends vertically from the inner end of the bottom portion, and a supporting portion 213 protruding while making a 'Ｕ'-shaped groove inward from the middle of the vertical portion. It is composed of A plurality of semicircular protrusions 231 are formed on the inner side of the vertical portion of the support frame 210, and the manhole cover 220 is also formed with a semicircular groove 232 where it meets the semicircular protrusions 231 of the support frame. The semi-circular protrusion 231 of the support frame and the semi-circular groove 232 of the manhole cover constitute a rotation preventing means 230. That is, at least two anti-rotation means 230 are provided to prevent rotation of the manhole cover 220.

The elastic packing 251 is installed in a "Ｕ" -shaped groove formed between the support part 213 and the vertical part 212 of the support frame 210 to alleviate the impact and suppress the occurrence of noise.

In order to facilitate the installation and dismantling of the manhole cover, a pair of semi-circular grooves are provided in the support frame and the manhole cover to be used as a hole for dismantling. You can easily remove the manhole cover by inserting an iron rod through the dismantling hole.

8 and 9 show another modified example (third embodiment) of the present invention. In this embodiment, the magnet is installed by forming a space of a constant length on the top of the pedestal in the second embodiment (Figs. 6 and 7).

In the second embodiment, a magnet is provided to prevent the manhole cover from detaching when the load is applied in the vertical direction as well as in the plane parallel to the plane of the manhole cover.

The locking part 340 by the magnet has a groove 342 for accommodating the magnet at a predetermined length on the upper end of the supporting part 213 of the support frame, and the plate magnet 341 is provided with a strong adhesive or a silicone sealant in the groove. It is fixed with the same caulking (caulking) material and the elastic packing 251 is installed in the 'Ｕ' groove formed in the support 213. The elastic packing 251 functions to alleviate the impact on the load applied to the manhole cover and to protect the magnet installed in the support portion from being damaged.

The locking parts 340 by magnets are installed at at least two locations, and each locking part is installed at equal intervals.

This third embodiment can be applied by modifying the first embodiment. In the first embodiment, when the magnet and the disassembly hole are combined instead of the locking portion, the cap is firmly coupled with the magnet force and the elasticity of the elastic packing. Therefore, the manhole assembly according to the present invention is a support frame 110, a manhole cover 120, a ring portion 130 that the support frame and the manhole cover is caught, and a locking portion 340 by a magnet fixing the support frame and the manhole cover It is composed of

10 is a plan view showing still another modified example (fourth embodiment) of the present invention. This fourth embodiment combines the ring portion 130 of the first embodiment (Fig. 4) and the rotation preventing means 230 of the second embodiment (Fig. 6 and Fig. 7).

11 is a plan view showing still another modification (fifth embodiment) of the present invention. The ring portion 130 of the first embodiment (FIG. 4) and the anti-rotation means 230 of the second embodiment (FIG. 6 and 7) are combined, but the protrusions and grooves of the rotation preventing means 230 are supported. And manhole cover alternately formed.

In addition, various modifications, for example, the magnet locks employed in the third embodiment of FIGS. 8 and 9 to increase the binding force of the manhole cover and the support frame in the fourth embodiment of FIG. 10 and the fifth embodiment of FIG. Modifications in combination with part 340 are possible, and possible variations are embodied in accordance with the claims.

12 is an improvement of the conventional support frame.

The vertical portion of the conventional support frame has a '1' shape. The upper part of the vertical part and the pavement surface of the pavement material 1 of the road are paved to coincide. The part where the pavement material 1 meets the vertical part of the support frame forms a right angle part so that it becomes a fragile part of the structure. It was easy to break. Pieces of damaged pavement were scattered and left unattended, causing further pollution and accidents.

The support frame of the present invention places the extension 214 on top of the support frame vertical. That is, the portion where the packing material 1 and the vertical part 212 of the support frame meet is extended to a predetermined length l from the top of the vertical part 212 to the outside so as to form an obtuse angle. Therefore, the load on the packaging surface is dispersed and relaxed, so that the risk of breakage of the packaging material 1 is reduced.

The extension part 214 extends the material of the vertical part 212 from the top of the vertical part 212 of the support frame 210 to the outer side, and the upper and lower parts of the extension part 214 and the portion where the upper part and the lower part meet each other are curved surfaces. Processing can maximize the effect.

The improved support frame of the present invention can achieve the desired effect when it is combined with the first to fifth embodiments and the modifications thereof described above.

The present invention provides a manhole assembly having a locking means, even when heavy vehicles pass or sewage flows on the road surface, the manhole cover is not released from the support frame, reducing the risk of breakage of the manhole, and noise when the vehicle passes. The effect that this does not occur can be obtained.

Claims (3)

Support frame; Manhole cover; A ring portion 130 to which the support frame and the manhole cover are caught; And in the manhole cover assembly consisting of; a locking portion 140 for fixing and fixing the support frame and the manhole cover, The locking portion 140 is installed in the lower portion of the manhole cover and is generally arc-shaped, the end of the long leg portion (141a) and the short leg portion (141b) in the 'c' shape of the end converges with each other The end of the long leg portion of the cross-section is curved and formed slightly open to the outer side of the female lock (141); And It extends from the support frame toward the inside, is engaged in the space formed between the long leg (141a) and the short leg (141b), the end is curved and the support frame protrusion formed slightly retracted inward A locking part consisting of 142; And a manhole cover assembly. The manhole cover assembly of claim 1, wherein the female lock (141) is formed of nodular cast iron. The lock part space 143 of claim 1, wherein the lock part has a lock part edge 144 formed in a 'c' shape in the support frame 110 and surrounded by the lock part edge 144. The manhole cover assembly further formed with a locking stopcock (145) protruding from the manhole cover (110).