KR20150117847A - Height adjusting apparatus for manhole cover - Google Patents

Abstract

The present invention relates to an apparatus for adjusting the height of a manhole cover. A lift frame (20) having a cover securing end (26)b on which a manhole cover (20′) is secured, is secured on an upper end of a lift rod (54) of a lift drive unit (40). The lift drive unit (40) allows the lift frame (20) to ascend or descend by concurrently mounting the lift rods (54) ascending or descending with the rotation of a sprocket (44) after the sprocket (44) is concurrently rotated by a chain (50) hung and wound on several sprockets (44). The lift drive unit (40) is covered by a cover (38) and is not exposed to the outside. The lift drive unit (40) is installed on a base (30) secured on the upper surface of a valve chamber body (12). According to the present invention, as only the lift frame (20), where the manhole cover (20′) is secured, is secured on the lift rod (54) and ascends or descends while secured, the lift drive unit (40) is positioned in the fixing part and can be stably operated. The lift frame (20) is separated and the cover (38) is removed to allow the easy access to the lift drive unit (40), thereby simplifying the assembly, maintenance, and repair.

Description

[0001] Height adjusting apparatus for manhole cover [

The present invention relates to a manhole cover height adjusting device, and more particularly, to a manhole cover height adjusting device for raising and lowering a lift frame on which a manhole cover is placed so that the manhole cover can be positioned at the same height as the ground.

The manhole cover shrouds the entrance to the inside of the valve chamber which is buried in the ground, and is generally exposed to the ground. Since the manhole cover is installed on the ground, the height of the manhole cover should be changed according to the height of the ground.

That is, the ground tends to increase steadily in general due to road pavement and the like. Of course, the ground may be lower than originally due to loss of soil. When the ground height changes, the height of the manhole cover exposed on the ground should be adjusted.

If the height of the manhole cover remained unchanged when the ground level became high, a groove would be formed on the road and the ground would be lowered. If the height of the manhole cover remained unchanged, the manhole cover would protrude from the road There arises a problem that it interferes with the running of the vehicle or the walking of the pedestrian.

Accordingly, many attempts have been made to adjust the height of the manhole cover exposed on the road as disclosed in the following prior art documents.

However, the conventional techniques for adjusting the height of the manhole cover have a problem that the height of the manhole cover can not be uniformly raised as a whole, and even if the height of the manhole cover can be raised and lowered uniformly, The height adjuster of the manhole cover was not utilized properly.

Particularly, since the mechanical structure for lifting and lowering the manhole cover is raised and lowered together with the manhole cover, there is a problem that the mechanical structure is easily broken.

Korean Patent No. 10-0988800 Korean Patent No. 10-0928469 Korea Patent No. 10-0949710

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a manhole cover capable of elevating and lowering the manhole cover as a whole.

Another object of the present invention is to provide a lifting frame on which a manhole cover is seated, in which a mechanical structure for lifting and lowering the lifting frame is separately provided.

Another object of the present invention is to provide a mechanical structure for lifting and lowering a lifting frame to be elevated and lowered for adjusting the height of a manhole cover to be fixed to the valve chamber side.

According to an aspect of the present invention for achieving the above object, the present invention provides a manhole cover for lifting and lowering a manhole cover for shielding an inlet for communicating with an internal space inside a valve chamber body forming a skeleton of a valve chamber, Wherein the sprocket is mounted on the valve body and includes a plurality of sprockets which are hung on a chain and are lifted up and down relative to the respective sprockets to rotate the sprocket, A cover which is supported by the raising and lowering rods so as to be lifted up and down by a raising rod and which penetrates the inside of the inner space, And an upper end portion of the upper end of the upper end portion It comprises a lifting frame is mounted just formed.

A tension guide is provided between the sprockets to guide the locus of the chain and maintain the tension.

The tension guide is provided with a support rib for guiding the height of the chain.

The lifting and lowering driving mechanism includes a driven gear that rotates integrally with the sprocket and a driving gear that drives the driven gear, and a driving unit provided outside the cover rotates the driving gear.

A flat gear or a bevel gear is used as the driving gear and the driven gear.

The sprocket is provided with a barrel seating portion having a first threaded portion formed therein and rotatably installed in the first support barrel and a second threaded portion interlocked with the first screwed portion is formed in the barrel so as to penetrate the barrel seating portion .

A base is seated on the upper surface of the valve body body. The base is mounted on the upper surface, and is provided with a seating plate on which the elevation driving mechanism is positioned, and a base spout extending from the seating plate and having a through hole formed therein .

Wherein the frame body is formed with a skeleton of the lifting frame, the passage is formed through the inside of the frame body, the lid seating end is formed at the edge of the entrance of the passage, So that the upper surface of the lifting rod is in contact with the lower surface of the support frame. A frame slit is formed at a lower portion of the frame body so that the outer surface and the inner surface of the frame are opposite to each other.

The following effects can be obtained in the manhole cover height adjusting apparatus according to the present invention.

First, in the present invention, the lift frame on which the manhole cover is seated is elevated and lowered by a lift driving mechanism provided on the valve chamber side, wherein the lift gate synchronizer is configured to raise and lower the driving rod constantly by using a chain. Therefore, since the elevating and lowering frame is constantly elevated and lowered, the manhole cover seated on the elevating frame can be raised and lowered constantly.

Next, in the present invention, the lifting rod of the lifting and lowering driving mechanism fixedly installed on the valve chamber side supports and supports the lifting frame, so that only the lifting and lowering rod is lifted and lowered in the lifting driving mechanism, There is an improving effect.

According to the present invention, there is an elevation driving mechanism fixed to the valve chamber side, and the elevation frame lifted and lowered by the elevation driving mechanism is simply mounted on the elevation rod of the elevation driving mechanism, and the height adjusting device of the manhole cover is mounted on the valve chamber The operation of separating and removing can be very easily performed, and the maintenance can be easily performed.

1 is a perspective view showing a state in which a preferred embodiment of a height adjusting device for a manhole cover according to the present invention is installed in a valve chamber.
FIG. 2 is an exploded perspective view showing a main configuration of an embodiment of the present invention. FIG.
3 is a sectional view showing a configuration of an embodiment of the present invention;
4 is a plan view showing a main part of a lifting and lowering driving mechanism constituting an embodiment of the present invention.
5 is a perspective view showing another embodiment of the present invention only as an important part.
6 is an operational state diagram showing the embodiment shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a manhole cover height adjusting apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

According to the drawings, the height adjusting device of the present invention is installed at the upper end of the valve chamber 10. The valve chamber body (12) forms a skeleton of the valve chamber (10). A predetermined internal space (14) is formed in the valve chamber body (12). The inner space 14 is communicated with the outside by an unillustrated outlet pipe provided at both ends of the valve chamber body 12. [

A communication portion 16 for communicating the internal space 14 and the outside of the paper surface side is formed at the upper end of the valve chamber body 12. [ And the operator can access the internal space 14 through the communicating portion 16. [ The inlet edge of the communicating portion 16 is the upper end surface 18 of the valve chamber body 12. [

A lift frame 20 on which the manhole cover 20 'is seated is installed on the upper end surface 18 of the valve body body 12. The lift frame 20 is lifted and lowered by the lift driving mechanism 40 to be described below. The lift frame 20 is circular in plan view.

The frame body 22 forms a frame of the lifting frame 20. A through hole (23) is formed through the frame body (22). The passage (23) has a circular cross section. The passage 23 is shielded by the manhole cover 20 '.

And extends to a lower portion of the frame body 22 to form a cylindrical frame cut 24. And the through hole 23 is formed through the inside of the frame cut 24. A lid seating end 26 on which the edge of the manhole cover 20 ', which surrounds the entrance edge of the through-hole 23, is seated is formed in the upper end of the frame body 22 to have a predetermined width.

A support flange 28 is formed to surround the outer surface of the frame body 22. The support flange 28 is formed on the outer surface of the frame body 22 by a predetermined width in a ring shape. The lower surface of the support flange 28 is held in contact with the upper end of the elevating bar 54 to be described below. A cylindrical support rib (not shown) may be formed at a portion of the support flange 28 where the elevation bar 54 is in contact with the upper end of the elevation bar 54. Thus, relative movement between the elevating rod 54 and the elevating frame 20 is lost when the elevating rod 54 is fitted with the supporting ribs.

A base (30) is seated on an upper end surface (18) of the valve chamber body (12). The base 30 is a portion where the lifting and lowering driving mechanism 40 to be described below is installed and substantially the lift frame 20 is seated. The base 30 has a seating plate 32 that is seated on the upper end surface 18 of the valve chamber body 12. The shape of the seating plate 32 may vary depending on the shape of the top surface 18.

The base plate (34) is formed in a cylindrical shape on the seating plate (32). The outer diameter of the base spindle 34 is formed to be larger than the inner diameter of the frame spindle 24 of the frame body 22 so that the base spindle 34 is positioned inside the frame spindle 24. do. The base plate 34 protrudes upward from the seating plate 32 and is formed into a cylindrical shape. An extended through hole 36 is formed in the base slit 34. The through hole 36 is formed in the base slit 34 so that the communicating portion 16 of the valve chamber 10 and the through hole 23 communicate with each other.

On the outer surface of the base 30, a substantially cylindrical cover 38 is provided. The cover 38 cooperates with the outer surface of the seating plate 32 of the base 30 and the base skirt 34 to form a space in which the elevation driving mechanism 40 is installed. The cover 38 serves to protect the elevation driving mechanism 40 from the outside. The cover 38 comprises a cylindrical side wall 39 and a top plate 39 'in the form of a ring at the top of the side wall 39. A plurality of barrel holes 38 'are formed in the upper plate 39'.

An elevation driving mechanism (40) is installed in the space formed by the cover (38) and the base (30). The lifting and lowering driving mechanism (40) lifts the lifting frame (20) by a driving force provided by an operator manually or through a separate driving source.

A first support barrel 42 is fixed on the seating plate 32 of the base 30 and a sprocket 44 is rotatably installed in the first support barrel 42. The sprocket 44 serves to transmit the power to the chain 50 by waving the chain 50, which will be described below. The sprocket 44 has a barrel seating portion 46. The barrel seating portion 46 is seated in the first support barrel 42 so that the sprocket 44 is rotatably supported by the first support barrel 42.

A through hole 47 is formed through the center of the sprocket 44 and a second threaded portion 48 is formed on the inner surface thereof. The chain (50) is wound around the sprocket (44) thus configured. In this embodiment, three sprockets 44 are provided so as to surround the seating plate 32 of the base 30. The chain 50 is wound around the three sprockets 44, as shown in Fig.

A tension guide 52 is disposed between the sprockets 44 so that the chain 50 maintains some elasticity so that the chain 50 does not contact the outer surface of the base skirt 34 of the base 30. The tension guide 52 is simply a rod having a predetermined diameter and the tension guide 52 has a supporting rib 53 so that the chain 50 is not sagged below a certain level. The support rib 53 supports the lower end of the chain 50 so that the chain 50 is positioned on a predetermined height of the tension guide 52.

The lifting rod 54 is installed so that the sprocket 44 is relatively rotated by being rotated in the first support cylinder 42. [ The elevating rod 54 has a first screw portion 56 partially inserted into the through hole 47 of the sprocket 44 and interlocked with the second screw portion 48 in the through hole 47. The first screw portion 56 is formed in a part of the lower end of the elevating rod 54 and interlocked with the second screw portion 48 of the sprocket 44 to move the elevating rod 54 up and down.

The upper end of the elevating rod 54 protrudes above the upper plate 39 'of the cover 38 through the barrel hole 38'. The upper end of the elevating rod 54 supports the lower surface of the supporting flange 28 of the elevating frame 20 so that the elevating frame 20 is elevated.

One of the sprockets (44) is provided with a driven gear (58). The driven gear 58 is rotated integrally with one of the sprockets 44. And a driving gear 60 engaged with the driven gear 58. The driving gear 60 is integrally rotated with a driving rod 62 provided in the space formed by the cover 58 and the base 30. [ The driving bar 62 is relatively rotatable with respect to the second supporting barrel 66 fixed on the seating plate 32 of the base 30. The driving rod 62 protrudes partly on the upper plate 39 'of the cover 38. The driving rod 64 is mounted on the driving rod 62 protruding on the upper plate 39 'of the cover 38. The driving unit 64 may have a hexagonal nut shape, for example. If the driving unit 64 has a hexagonal nut shape, the driving unit 64 may be rotated using a tool. The rotation of the driving unit 64 produces rotation of the driving rod 62.

Fig. 5 shows the essential structure of another embodiment of the present invention. In this embodiment, only the important parts different from the above-described embodiment are shown, and the parts corresponding to those of the above embodiments are denoted by reference numerals of 100 units.

In this embodiment, a bevel gear is used as the drive gear 160 and the driven gear 158 for transmitting the driving force for rotating the up-and-down rope 154. For reference, a spur gear is used as the driving gear 60 and the driven gear 58 in the embodiment. The drive unit 164 that drives the drive gear 60 by using the bevel gear as the drive gear 160 and the driven gear 158 is installed in the direction perpendicular to the longitudinal direction of the hoist rope 154 . That is, the driving unit 164 can be placed on the outer surface of the side wall 39 of the cover 38.

The driving gear 160 is installed on a mounting bracket 160 'fixed on the seating plate 132 of the base 130. Of course, it may be installed on the side wall 39 of the cover 38 instead of the mounting bracket 160 '.

The driven gear 158 is rotated integrally with the sprocket 144 rotatably supported by the first support cylinder 142. The elevating rod 154 is installed through the center of the sprocket 144 and the elevating rod 154 is lifted up and down according to the rotation of the sprocket 144 to lift the elevating frame 120.

Hereinafter, a manhole cover height adjusting apparatus according to the present invention will be described in detail.

The operation of the manhole cover height adjusting device of the present invention is well illustrated in FIG. 6 (a), the lift frame 20 is at its lowest position. Therefore, the manhole cover 20 'that is seated on the lid seating end 26 of the lifting frame 20 is also located closest to the top surface 18 of the valve chamber 10.

In this state, when the height of the manhole cover 20 'needs to be increased, the elevating frame 20 is raised. For example, the case where the ground surface indicated by a dotted line is increased by the packing of the road or the like can be mentioned. Of course, the height of the manhole cover 20 'should be lowered when the ground level is lowered due to soil loss or the like. To this end, it is necessary to provide a margin in which the lifting frame 20 can fall beforehand when installing the apparatus of the present invention.

Here, the elevation frame 20 is raised to raise the height of the manhole cover 20 '. When the operator rotates the driving part 64 which is visible outside the supporting flange 28 of the lifting frame 20, the driving rod 62 rotates by the rotation of the driving part 64. The rotation of the driving rod (62) produces rotation of the driving gear (60).

When the drive gear 60 rotates, the driven gear 58 rotates together and the sprocket 44, which is rotated integrally with the driven gear 58, is rotated by the rotation of the driven gear 58 . The rotation of the sprocket 44 causes the chain 50 hung on the sprocket 44 to move.

The chain 50 is wound around a plurality of sprockets 44 as shown in FIG. 4, so that the sprockets 44 are simultaneously rotated. The second threaded portion 48 formed in the through hole 47 passing through the center of the barrel seating portion 46 of the sprocket 44 is engaged with the first threaded portion 54 of the elevating rod 54, So that the elevating rod 54 moves upward while relatively rotating with respect to the barrel seating portion 46 of the sprocket 44. As shown in FIG. Whether the elevating rod 54 ascends or descends is determined according to the rotational direction of the driving unit 64.

The elevating rod 54 is rotated and raised by the rotation of the sprocket 44 as the barrel seating portion 46 of the sprocket 44 is rotated in the state that the barrel seating portion 46 is installed in the first support barrel 42 6 (a) to (b), the lifting rod 54 is lifted.

That is, when the elevation driving mechanism 40 is driven, the elevation rod 54 is elevated and protrudes above the upper plate 39 'of the cover 38 to lift the elevation frame 20. The upper end of the elevating rod 54 contacts the supporting flange 28 of the elevating frame 30 to lift the elevating frame 30.

6 (a), the frame slit 24 is overlapped with most of the base slit 34 of the base 30, so that the frame slit 24 overlaps most of the base slit 34 of the base 30. 6 (b), only a part of the lower end of the frame saw 24 overlaps with a part of the upper end of the base skirt 34. As shown in FIG.

When the lifting frame 30 is relatively lifted, the manhole cover 20 'that is seated in the lifting frame 26 of the lifting frame 30 also rises. Therefore, even if the height of the floor increases, the height of the lifting frame 30 and the manhole cover 20 'can be increased accordingly. That is, the height of the ground surface and the manhole cover 20 'can be made equal.

On the other hand, when it is necessary to lower the elevating frame 30, the operator may rotate the driving unit 64 in the opposite direction. Of course, there is a sufficient margin for the elevating rod 54 to descend with respect to the barrel seating portion 46 of the sprocket 44. When the lifting frame 30 is lowered, the height of the lifting frame 30 and the manhole cover 20 'is lowered.

Three sprockets 44 are provided on the seating plate 32 of the base 30. A tension guide 52 is provided between the sprockets 44 to support the chain 50, Of course. The tension guide 52 prevents the chain 50 from interfering with the outer surface of the base skirt 34 of the base 30. The chain 50 may be supported by the support ribs 53 of the tension guide 52 and guided at a predetermined height with respect to the tension guide 52.

Then, the installation and disassembly of the height adjusting device of the present invention will be briefly described. The base (30) is installed on the upper end surface (18) of the valve body body (12). The base 30 may be installed on the upper surface 18 in a state where the elevation driving mechanism 40 is installed on the base 30.

The upper ends of the elevating rods 54 are all at the same height so that the elevating rods 54 are properly positioned relative to the ground. Of course, it is preferable to set the height of the elevating rod 54 again after the installation.

Next, the cover (38) is mounted on the base (30). When the cover 38 is mounted on the base 30, the elevating rod 54 is protruded through the upper plate 39 'of the cover 38. That is, all of the components of the elevation driving mechanism 40 except for the elevating rod 54 are covered by the cover 38.

After covering the cover (38), the lifting frame (20) is installed to be supported by the lifting rod (54). So that the upper end of the elevating rod 54 is seated on the lower surface of the supporting flange 28 of the elevating frame 20. At this time, the base skirt 34 of the base 30 is positioned in the through hole 23 formed in the frame slit 24. In this way, the assembly of the inventive device is completed.

Next, the disassembly proceeds in the reverse order of the above-described assembly. After the lift frame 20 is removed and the cover 38 is removed, the lift mechanism 40 can be accessed. Of course, the base 30 may be directly separated from the valve chamber body 12 to separate the valve chamber 10 from the valve chamber 10.

However, when performing maintenance of the lifting and lowering driving mechanism 40, if the lifting frame 20 and the cover 38 are separated from each other, the lifting and lowering driving mechanism 40 can be easily accessed. .

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

For reference, in the illustrated embodiment, the elevation driving mechanism 40 is provided on the seating plate 32 of the base 30, but this is not necessarily the case. For example, the elevation driving mechanism 40 may be installed on the upper end surface 18 of the valve body body 12. In this case, a configuration similar to that of the base 30 may be provided in the valve chamber body 12.

10: valve chamber 12: valve chamber body
14: inner space 16:
18: top surface 20: lift frame
20 ': manhole cover 22: frame body
23: Tongue study 24: Frame cut
26: lid seat end 28: support flange
30: base 32: seating plate
34: Bass cut 36: Extension hole
38: Cover 38 ': Rod hole
39: side wall 39 ': top plate
40: lift driving mechanism 42:
44: sprocket 46: barrel seat part
48: second thread portion 50: chain
52: tension guide 53: support rib
54: wick 56: first thread
58: driven gear 60: drive gear
62: driving shaft 64: driving part
66: second support tube

Claims (8)

A height adjusting device for a manhole cover for raising and lowering a manhole cover for blocking an inlet for communication with an internal space inside a valve chamber body forming a skeleton of a valve chamber,
A lifting and lowering driving mechanism installed on the valve body for lifting and lowering the lifting bar with respect to a driving unit for rotating the sprocket, the lifting and lowering rod having a plurality of sprockets,
A cover for covering the elevation driving mechanism so that the elevation rod of the elevation driving mechanism projects through the upper plate,
A lifting frame supported by the lifting bar and lifted by a lifting bar to form a through hole for communicating with the inner space through the inside and a cap seating end where the manhole cover is seated on an edge of an inlet of the through hole; Height adjuster of manhole cover included.
The apparatus of claim 1, wherein a tension guide is provided between the sprockets to guide the locus of the chain and maintain the tension.
3. The apparatus of claim 2, wherein the tension guide is provided with a support rib for guiding the height of the chain.
[Claim 2] The motorcycle according to claim 1, wherein the lifting and lowering driving mechanism includes a driven gear rotatable integrally with the sprocket and a driving gear for driving the driven gear, and a driving unit provided outside the cover rotates the driving gear, .
5. The apparatus of claim 4, wherein the drive gear and the driven gear are flat gears or bevel gears.
[2] The apparatus as claimed in claim 1, wherein the sprocket includes a barrel seating portion having a first threaded portion formed therein, and is rotatably installed in a first support barrel, and a second screw portion interlocked with the first screw portion is formed in the barrel, A height adjustment device of a manhole cover installed through a seat part.
The valve seat according to any one of claims 1 to 6, wherein a base is seated on an upper surface of the valve chamber body, the base being mounted on the upper surface and having a seating plate on which the elevation driving mechanism is located, And a bass spout having an extension hole formed therein.
[8] The apparatus as claimed in claim 7, wherein the framework of the lifting frame is formed by a frame body, the through-hole is formed through the inside of the frame body and the lid seating end is formed at the entrance edge of the through- A supporting flange protruding from the bottom surface of the frame body to protrude a predetermined distance around the outer surface of the lifting rod to contact the bottom surface of the lifting rod, Height adjustable lid.

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