KR20210042056A - Rubber sealed sliding open type manhole cover - Google Patents

Abstract

The present invention relates to a sealed manhole cover that is slidably opened and closed, which comprises: a cover main body (10) installed in an upper portion of a manhole (2) to allow ball casters (12) to be installed in a row in lower portions at both sides thereof; a lifting cam means (20) allowing cam rollers (21) installed in the lower portions at the both sides of the cover main body (10) to lift the cover main body (10) by a cam operation; and a cam driving means (30) configured to drive the cam roller (21) of the lifting cam means (20) to control the cam operation. Accordingly, the cover main body can be simply opened and closed in a sliding manner to provide excellent opening and closing workability. Moreover, the manhole cover can be safely opened and closed regardless of the size or weight thereof, thereby providing excellent safety.

Description

Slide opening and closing airtight manhole cover {RUBBER SEALED SLIDING OPEN TYPE MANHOLE COVER}

The present invention relates to a slide opening and closing airtight manhole cover, and in more detail, since the manhole cover installed buried in the top of the manhole is simply opened and closed by a slide method, it has excellent opening and closing workability and is safe regardless of the size or weight of the manhole cover. It relates to a slide opening and closing airtight manhole cover that can be opened and closed with excellent safety.

In general, a manhole is a hole formed to manage and inspect various communication cables or other facilities such as water, sewage, and power lines buried under the ground.

Manhole covers are installed in these manholes for safety.

Such a conventional manhole cover is used to open and close by simply seating and installing on the top of a structure installed in the manhole, or by being hinged to open and close the hinge up and down.

However, since the manhole cover is made of a metal material and has a heavy weight, it is not only inconvenient to open and close the manhole cover, but also has a problem in work safety.

In particular, the underground hydrant valve box for aircraft refueling is used to open and close an electric valve that automatically opens and closes the valve constituting the leak detection system and various measuring transmission devices inside the manhole and opens and closes with a manhole cover. Since the manhole cover is much larger and heavier than the general manhole cover to withstand the weight of the aircraft, it is more difficult to open and close, and it has a problem that the work safety is poor. Also, the waterproof function of the manhole cover is weak, so it is not electric or electronic in rainy weather. There were many difficulties in the management of the leak detection device composed of parts.

In addition, when the manhole cover is hinged, maintenance is cumbersome and maintenance costs are high due to damage that the hinge portion cannot withstand the weight and is easily broken, and there is a work space in which the manhole cover can be rotated up and down. There was a problem that the space efficiency was also inferior because it was required.

Patent Document 1: Registered Patent No. 10-0914627 Patent Document 2: Registered Patent No. 10-0892589

The present invention was invented to solve all the problems of the prior art described above. Since the manhole cover installed buried in the top of the manhole is simply opened and closed by a slide method, it has excellent opening and closing workability, as well as regardless of the size or weight of the manhole cover. Its purpose is to allow it to be opened and closed safely.

An object of the present invention is to prevent damage or failure of various facilities installed inside the manhole with a waterproof function that completely blocks the inflow of rainwater into the manhole.

In the present invention, the cover body is supported and installed on the upper step of the manhole and ball casters are installed in a row at the lower sides of the manhole, and at least two cam rollers are connected to the lower side of both sides of the cover body by means of a connecting bar. It consists of an elevating cam means for elevating and lowering and a cam driving means that is connected to the cam roller of the elevating cam means by a rotary shaft to control the cam roller by rotation of the rotary shaft, so that the cover body is elevated and then opened and closed in a slide manner. Ham has its characteristics.

In the present invention, a guide rail is installed between the ball caster of the cover body and the cam roller of the elevating cam means by raising and lowering the cam roller to guide the movement of the ball caster, wherein the guide rail has long holes formed vertically on both sides. It is inserted into the guide pin inside the manhole and configured to guide the elevating and descending.

The present invention is characterized in that the cam driving means is constituted by a geared winch.

The present invention is characterized in that a waterproof seal is installed in the upper stepped portion of the manhole in close contact with the lower portion of the cover body to airtightly block the manhole.

In the present invention, the cover body is configured to cover only a portion of the menhole, and the remaining portion is configured as a fixed cover that is not moved,

The guide rail is installed to correspond to the size of the reduced cover body, and the cam roller located at the bottom of the fixed cover is configured in a rectangular shape so that the cam function is lost when driven.

In the present invention, an elevating cam means is provided in the lower part of the cover body above the manhole, and the cover body is elevated from the manhole by the cam operation of the elevating cam means, and then the cover body in a slide manner by a ball caster and a guide rail under the cover body. Because it is simply opened and closed by a slide method, it has a very excellent effect of opening and closing workability compared to the conventional hinge-type manhole cover.

In particular, the manhole cover can be safely opened and closed regardless of the size or weight of the manhole cover, thereby having excellent safety effects.

Therefore, it can be widely applied and installed regardless of the weight of the manhole cover, such as a high-weight manhole cover installed in an underground hydrant valve box for aircraft refueling or a low-weight manhole cover used for other purposes.

In addition, since the present invention has a waterproof function that completely blocks the inflow of rainwater into the manhole, it has the effect of preventing damage or failure of various facilities installed inside the manhole, so that it can be applied and installed more widely.

1 is a perspective view showing the device of the present invention. Figure 2 is a side cross-sectional view of the present invention cover body in a closed state. 3 is an enlarged view of part "A" of FIG. 2; Figure 4 is a front cross-sectional view of the present invention cover body in a closed state. 5 is an enlarged view of part "B" of FIG. 4; Figure 6 is a side cross-sectional view of the present invention cover body in an open state. 7 is an enlarged view of part "C" of FIG. 6. Figure 8 is a plan configuration diagram of the present invention. Figure 9 is a cross-sectional view showing the main part of the present invention waterproof seal coupling structure. 10 is a side cross-sectional view of a cover body in a closed state according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The slide opening/closing airtight manhole cover of the present invention is configured to open and close a low weight manhole cover used for other purposes as well as a high weight handhole cover installed in an underground hydrant valve box for aircraft refueling in a slide manner.

That is, the present invention consists of a cover body 10, an elevating cam means 20, and a cam driving means 30 as shown in FIGS. 1 to 9.

The cover body 10 is supported and installed on the upper stepped portion 5 of the manhole 2.

At this time, a waterproof seal 50 is installed in the upper stepped 5 to form an assembly groove 6 along the rim so as to be in close contact with the lower portion of the cover body 10 to airtightly block the manhole.

At least two or more of a plurality of ball casters 12 are installed in a row on both lower portions of the cover body 10 for slide movement.

The elevating cam means 20 is configured such that at least two cam rollers 21 are connected to the lower portions of both sides of the cover body 10 by a connecting bar 22 to elevate and lower the cover body 10 by a cam operation. .

At this time, the cam roller 21 is preferably located under the ball caster 12 of the cover body (10).

The cam driving means 30 is installed at a position of a rotation shaft 35 connecting the cam rollers 21 on both sides of the elevating cam means 20 and configured to control the cam roller 21 to operate the cam.

The cam driving means 30 is preferably composed of a gear type winch (31).

The geared winch 31 engages the drive gear 33a of the drive shaft 33 rotatable by the rotation handle 32 and the interlocking gear 34a of the interlocking shaft 34 as shown in the drawing, and the interlocking shaft It is configured to connect or integrally form (34) with the rotation shaft (35).

At this time, the rotation handle 32 is formed in a detachable structure and is configured to be selectively inserted and connected through an operation hole 15 formed in the cover body 10 to control the operation, and the operation hole of the cover body 10 ( 15) is configured to block airtightness with normal packing (not shown).

In addition, it goes without saying that the cam driving means 30 can be replaced with a servo motor or other various means capable of controlling the rotation of the rotation shaft 35 of the cam roller 21.

Guide for moving the ball caster 12 by moving the ball caster 12 by moving the ball caster 12 by moving the cam roller 21 together between the ball caster 12 of the cover body 10 and the cam roller 21 of the lifting cam means 20 Rail 40 is installed and configured.

Long holes 42 are formed up and down on both sides of the guide rail 40, and the long holes 42 are inserted and installed in the guide pin 43 inside the manhole, so that the guide rail 40 is constantly guided up and down. .

In addition, an auxiliary guide rail 45 is provided in a position parallel to the guide rail 40 in the ground position where the cover body 10 slides open to guide the movement of the ball caster 12 of the cover body slide open to the ground. It is configured to do.

On the other hand, in another embodiment of the present invention, as shown in FIG. 10, the cover body 10 is configured to cover only a portion of the menhole 2, and the remaining portions are configured with a fixed cover 11 that is not moved.

This configuration reduces the overall weight of the cover body 10 so that the slide can be moved more easily, and in particular, the operator can easily enter and exit rather than input large equipment.

As described above, when the cover body 10 is configured with the fixing cover 11 and its length is reduced, the guide rail 40 is configured and installed to correspond to the size of the cover body 10, and the fixing cover (11) The cam roller 21a located at the lower end is configured in a square shape or a shape equivalent thereto so that the cam function is lost when driving.

As a non-explanatory symbol, 24 denotes a stopper that limits the rotation of the cam roller 21.

The following will look at the operation and operation of the present invention configured as described above.

The present invention can be easily opened and closed regardless of the weight of the manhole cover, such as a high-weight handhole cover installed in an underground hydrant valve box for aircraft refueling, as well as a low-weight manhole cover used for other purposes.

First, a process of slide-opening the cover body 10 is described, by using the gear-type winch 31 of the cam driving means 30 to rotate the rotation shaft 35 of the cam roller 21.

That is, the rotation handle 32 of the geared winch 31 is connected through the operation hole 15 of the cover body 10 and then rotated to engage the drive gear 33a of the drive shaft 33 and the interlocking shaft ( Since the interlocking gear 34a of 34) is rotated, the rotation shaft 35 of the cam roller 21 connected to the interlocking shaft is rotated.

In this way, as the cam roller 21 is operated by the rotation of the rotation shaft 35 of the cam roller 21, the cover body 10 is lifted and lowered away from the upper stepped step 5 of the manhole.

In particular, at least one cam roller 21 is connected by connection bars 22 on both lower sides of the cover body 10 to constantly lift and lower the cover body 10 as a whole.

In addition, the guide rail 40 installed on the upper part of the cam roller 21 rises together by the cam operation of the cam roller 21, and the lower part of the ball caster 12 is installed in a row on both sides of the lower cover body 10. Will be located in.

At this time, the guide rail 40 is precisely raised to be located under the ball caster 12 of the cover body 10 because the long holes 42 formed on both sides of the upper and lower sides are guided by being inserted into the guide pin 43 inside the manhole and raised and lowered. It is going to work down.

In this way, when the cover body 10 is lifted apart from the upper stepped portion 5 of the manhole, the cover body 10 is slid to one side to open the manhole 2.

In addition, the cover body 10 is simply slide open regardless of the weight of the cover body 10 because the ball casters 12 installed in a row on both sides of the lower portion are guided by the guide rail 40 to slide and move.

In addition, the auxiliary guide rail 45 is installed parallel to the guide rail 40 on the ground on which the cover body 10 slides open, so that the cover body 10 is simply slide-moved.

Next, when the cover body 10 opened as described above is to be closed again, the cover body 10 is moved in the reverse direction, that is, to the top of the manhole 2 to its original position.

At this time, the ball casters 12 on both sides of the lower part of the cover body 10 are guided by the auxiliary guide rail 45 and the guide rail 40 to simply return to their original position to a predetermined position above the manhole 2.

In this state, the rotation shaft 35 of the cam roller 21 is reversely rotated using the geared winch 31 of the cam driving means 30 as described above.

In this way, since the rotation shaft 35 of the cam roller 21 is reversely rotated, the cam roller 21 moves down to the original position together with the guide rail 40, and the cover body 10 is also lowered to the upper step 5 of the manhole. While doing it, the manhole (2) is closed again.

At this time, since the waterproof seal 50 is installed in the assembly groove 6 formed along the rim in the upper stepped portion 5 of the manhole 2 and is in close contact with the lower portion of the cover body 10, the manhole ( 2) It essentially blocks the inflow of rainwater, etc. into the interior.

Therefore, the present invention can be used not only to simply open and close the manhole cover buried in the top of the manhole by a slide method, but also to safely open and close regardless of the size or weight of the manhole cover, and to completely block the inflow of rainwater into the manhole. As a function, it is possible to prevent damage or breakdown of various facilities installed inside the manhole.

2: manhole 5: stepped 10: cover body 12: ball caster 20: elevating cam means 21: cam roller 22: connecting bar 30: cam driving means 35: rotation shaft 40: guide rail 42: long hole 43: guide pin 45: auxiliary guide rail 50: waterproof seal

Claims (5)

The cover body 10 is supported and installed on the upper stepped jaws 5 of the manhole 2 and the ball casters 12 are installed in a row at both lower sides, and at least two cam rollers at both lower sides of the cover body 10 ( 21) is connected to the connecting bar 22, the elevating cam means 20 for elevating the cover body 10 by cam operation, and a rotation shaft 35 on the cam roller 21 of the elevating cam means 20 A slide opening/closing airtight manhole cover, characterized in that it is connected with a cam driving means (30) for controlling the cam operation of the cam roller (21) by rotation of the rotating shaft to open and close the cover body in a slide manner. According to claim 1, Between the ball caster (12) of the cover body (10) and the cam roller (21) of the elevating cam means (20), the ball caster (12) is raised and lowered together by a cam operation of the cam roller (21). ), but the guide rail 40 is installed to guide the movement, wherein the guide rail 40 is configured such that long holes 42 formed vertically on both sides are inserted and installed in the guide pin 43 inside the manhole to guide elevating and descending Slide opening and closing airtight manhole cover. The method of claim 1 or 2, wherein the cam driving means (30) is composed of a geared winch (31) installed at a position of a rotation shaft (35) connecting both cam rollers (21), The rotating handle (32) is a slide opening and closing airtight manhole cover, characterized in that it is configured to selectively control the operation by inserting into the operation hole (15) formed in the cover body (10). According to claim 1 or 2, The upper stepped (5) of the manhole (2) is in close contact with the lower portion of the cover body (10), characterized in that a waterproof seal (50) is installed and configured to airtightly block the manhole (2). Slide opening and closing airtight manhole cover. The cover body according to claim 1, wherein the cover body 10 is configured to cover only a part of the menhole 2 and the rest of the cover body is configured with a fixed cover 11 that does not move, and the guide rail 40 is reduced. 10) is installed to correspond to the size, and the cam roller (21a) located at the bottom of the fixed cover (11) is a slide opening and closing airtight manhole cover, characterized in that it is configured in a square shape so that the cam function is lost when driven.

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