JP3157875U - Manhole cover - Google Patents

Abstract

Provided is a labor-saving waterproof manhole cover. The cover is coupled between an annular base 1, a cover body 2 covering and sealing the base 1, and the base 1 and the cover body 2 to support the cover body 2 in a tiltable manner. A support component 5, a telescopic cylinder 3 interposed between the base 1 and the cover main body 2, for pressing the cover main body 2 from a position where the base 1 is covered and sealed to a position where it rises on the edge of the base 1; 1 and a cover body 2, provided on the opposite side of the support component 5, and provided with a safety device 4 that locks the base 1 and the cover body 2. [Selection] Figure 1

Description

  The present invention relates to a manhole cover, and more particularly, to a structure of a labor-saving waterproof manhole cover.

  In general, many facilities such as pipelines, storage tanks, water channels (eg drainage channels, sewers) are installed below the road surface in order to make the most of public spaces while beautifying the environment. There is a continuous passage there, and an opening is provided on the road surface so that construction workers can enter and inspect and repair the facility. A manhole cover is embedded in the opening to prevent a passerby or vehicle from falling and to prevent foreign objects such as garbage from entering the passage and closing the passage.

  FIG. 5 shows the structure of a conventional manhole cover. As shown in FIG. 5, the manhole cover includes a base (72) embedded in the surface of the road surface, and a cover plate (71) installed on the base (72). It is configured to prevent accidents such as falling. This type of manhole cover is described, for example, in Patent Document 1. The cover plates (71) of such manhole covers are all made of a very heavy steel material, so that they can sufficiently withstand the weight of the car. Also, it is possible to avoid crushing after the milling die is held down. However, when a construction worker enters the sewer and cleans the drainage channel, the cover plate (71) is removed, but the cover plate (71) is heavy and difficult to move. Although it is possible to move the cover plate by inserting the tool into the hook hole (73) of the cover plate, the operation is not easy for the operator.

Japanese Utility Model Publication No. 1-75160

(1) In the conventional manhole cover, most of the steel material such as cast or stainless steel is used for manufacturing the cover so that the cover can sufficiently withstand the weight of the vehicle. For this reason, the cover plate of the manhole cover is too heavy, and a very large force is required when a construction worker causes the cover plate. Therefore, how to eliminate the force of the worker and cause the cover plate is a first problem to be solved by the present invention.
(2) In the conventional manhole cover, a considerably large gap (74) may be taken between the cover plate (71) and the base (72). For this reason, if the gap (75) is covered with dust, gravel, stones, dust, or other foreign matter, the gap is closed, and the cover plate (71) is left without being moved for a long time. Will be blocked or rusted and will not open easily. In this case, a construction worker can finally cause the cover plate by the hand tool by hitting the cover plate with a hammer until the cover plate is loosened. Thus, it takes a lot of time to open the cover plate, and the burden on the worker is only increased due to the labor-intensive operation. Therefore, how to avoid the problem that the cover plate of the manhole cover is blocked or rusted is the second problem to be solved by the present invention.
(3) In the conventional manhole cover, there is no structure for preventing the permeation of water around the manhole cover, so that rainwater is likely to enter from the gap. Therefore, how to prevent rainwater permeation with the cover plate of the manhole cover is a third problem to be solved by the present invention.

  The present invention solves such a conventional problem, and the cover main body can be securely closed on the base, and when the cover main body is caused, the cover main body is easily and reliably caused by omitting the force. Another object of the present invention is to provide a labor-saving waterproof manhole cover that can reliably prevent the penetration of rainwater from around the cover plate.

  In order to achieve the above object, the present invention is a kind of labor-saving waterproof manhole cover, which is covered with 1 ring base (1), 1 base (1), and the base is sealed ( 2). Is that special? The telescopic cylinder (3) is connected between the base (1) and the cover body (2). One surface of the telescopic cylinder (3) is the first end and the back end pivot of the base (1). The base (1) and the cover body (2) are connected to the pivot hub set on the bottom surface of the cover body (2), with the other end being the second end. 1 is provided with a safety device (4) in which a base (1) and a cover body (2) are connected to each other at the front end. A support part (5) is connected to the rear end of the base (1) and the cover body (2). One surface of the support part (5) is a first end and the bottom surface of the cover body (2). Another end, which is fixedly connected, is the second end and is connected to the pivot hub set of the slot (12) shaft wall provided in advance at the rear end of the base (1). The telescopic cylinder (3) can store pressure in advance, and after the safety device (4) releases the positioning relationship, the cover body (2) is automatically attached to the cover body (2) by itself. It can support and open.

The present invention is also embodied as follows.
(A) In the manhole cover, the top surface of the base (1) has an indented annular recess (14) so that the area of the cover body (2) described above is sufficiently large. The recessed groove (14) is firmly covered.
(B) Particularly in the above (a), a waterproof gasket (15) having a penetration effect is fitted into the annular recess (14).
(C) In the above manhole cover, the notch of the slot (12) is located on the inner wall of the back end of the base (1), and the protruding bump (11) is conspicuous downward below the slot (12). Is held. The above-mentioned support part (5) is provided with two left and right parts, the second end of which is inserted into the slot (12) and connected to the wall hub set of the left and right grooves, and a telescopic cylinder. (3) is positioned between the two support parts (5), the second end of which is located on the face of the front wall of the convex block (11) protruding from the pivot and the hub set.
(D) Especially in the above (c), the support part (5) is a fixed part (51) at the level of coupling of the bottom surface of the cover body (2), and the one part and the fixed part (51) are connected. In addition, it was connected to the other side of the winding part (52) that twisted in the U shape and the winding part (52) that twisted one side, and then the slot (12) shaft wall and pivot hub set. From the common hinge part (53), it was comprised by the system of three integral molding.
(E) Especially in the above (d), the telescopic cylinder (3) is separated at both ends, and the first combination part (31) and the second combination part (32) and the second combination part of the twin ear type and the twin type In combination with the set, the first combination part (31) is fixed to the wall surface in front of the protruding block (11). The second combination part (32) fixes the bottom surface of the cover body (2).
(F) Especially in (e) above, one L-shaped adjustment block (33) is provided between the above-mentioned first combination part (31) and the protruding block (11), and the adjustment block (33) Are fixed in connection with a flat plate and the bottom face of the protruding block (11), and are provided for fixing a vertical plate in connection with the first combination part (31).
(G) Particularly in the above (e) and (f), the reinforcing structure (24) of the reinforcing structure is installed on the bottom surface of the cover body (2), and the reinforcing structure (24) is formed in a radial radiation shape. Including a reinforcing beam (241), an annular saddle member (242) installed concentrically several times, and an centric annular saddle member (243) installed toward the center of 1. (243) and the center of the cover body (2) are separated from each other by one step, and the second combination part (32) is set within the range of the centric annular flange (243) of the cover body (2). And has been installed.
(H) Especially in (e) above, the first pillow block (54) having a thickness is provided between the support part (5) and the bottom surface of the cover body (2), and the second A second pillow block (34) having a thickness of 1 is provided between the combination part (32) and the bottom surface of the cover body (2).
(I) In the manhole cover, the safety device (4) protrudes prominently on the inner wall of the front end of the base (1). Moreover, the protruding fitting block (43), 1 of the screw hole (42) is installed at the front end of the cover main body (2) and is positioned corresponding to the above-described screw hole (42) (21 ), 1 is inserted into the positioning hole (21) and fixed to the screw hole (42) and the fixing part (41) fixed to the snail, and fixed around the fixing part (41), and the positioning hole (21) It includes a waterproof rubber ring (44) for preventing liquid penetration.

The manhole cover of the present invention has the following effects due to the above configuration.
[1] Labor-saving waterproof manhole cover of the present invention, the cover body (2) can cover the hole of the base (1) after covering the base (1), and can be sealed by the safety device (4) The cover main body (2) and the base (1) can be locked and connected to each other, and a safe effect is achieved in which the cover main body (2) cannot be pushed up to the telescopic cylinder (3) and raised. Contrary to this, after the construction personnel cancels the relationship of measuring the position of the safety device (4), the telescopic cylinder (3), which stores pressure in advance, automatically presses the cover body (2) by itself. It can be improved, and it is not necessary for the construction personnel to move and carry the cover main body (2), and it can be achieved that there is no demand for the burden of saving and saving power. Also, since the cover body (2) connects the support part (5) on the base (1), when the cover body (2) is lifted up, it supports the shaft that rotates the support part (5) and moves up. Can rotate and stand on a solid base (1) with one bevel after that, and after the telescopic cylinder (3) is deployed, the cover body (2) is automatically By not being lowered, the anti-drop drop function can be prevented.
[2] After the groove (14) in which the top surface of the base (1) has an annular dent, the cover body (2) and the base (1) are covered and sealed, and then a vacuum is created to joint. It can be avoided, and prevents the cover body (2) from causing difficulties when the cover body (2) is turned up, and the annular dent groove (14) is used to prevent temporary water when the liquid soaks. can do. Moreover, the area of the cover body (2) is larger than the annular indentation groove (14), so there is no tank or gap for any groove on the base (1) that can be used for embedding in miscellaneous goods or dust, so manhole You can keep everything clean on the surface of the cover.
[3] If the annular recessed groove (14) has the waterproof gasket (15), the liquid cannot flow into the base (1), and the manhole cover surely has water penetration. The effect is achieved.
[4] The support part (5) has two left and right settings, the telescopic cylinder (3) is positioned between the two support parts (5), and the telescopic cylinder (3) is the support part ( The first end of 5) is connected to the cover body (2), and the other second end is connected to the base (1), thus stabilizing the cover body (2) and the base (1). Can be tied together. Also, when the cover body (2) is covered on the base (1), the slot (12) of the base (1) is inserted into the support part (5) to achieve the hidden effect. Therefore, since there is a problem, the problem of appearing support parts cannot be generated. And the protruding mass (11) under the slot (12) can support the application force of the telescopic cylinder (3), and the telescopic cylinder (3) and the support part (5) can be kept online at the same time. Be positioned.
[5] The support part (5) can be obtained by smoothly connecting the bottom surface of the cover body (2) from the fixed part (51) of the level, and the twisted and bent part (52) of the U-shaped curve is the cover body It is possible to avoid contact with the base edge of the base (1) after standing (2), and to use a straight joint hinge part (53) with the shaft wall of the slot (12) and the pivot hub set.
[6] The telescopic cylinder (3) is a raising arm used to push up the cover body (2), and both ends thereof are a first combination part (31) having a double ear shape and a second combination part ( 32) Connecting the pivot hub set, therefore, the telescopic cylinder (3) can have a space for expansion and contraction of activity, and the length of the expansion and contraction can be flexibly adjusted at the same time as the angle change of the cover body (2) You can change that.
[7] An L-shaped adjustment block (14) is provided between the first combination part (31) and the block (11) protruding from the door, and the adjustment block (14) is in addition to the telescopic cylinder (3). It can be adjusted by adjusting the distance between the blocks (11) protruding from the side of the cylinder, and when it spreads out to the other side of the telescopic cylinder (3), it causes a conflict with the support part (5). Can be avoided.
[8] The installation of the reinforcing structure (24) can be used to make the structure of the cover body (2) more robust and more dispersed to withstand pressure from the outside of the cover body (2) Further, one surface of the telescopic cylinder (3) is separated from the center of the centric annular collar (243) and the center of the cover body (2) by one step (L). 243) is hub-set, so the length of the telescopic cylinder (3) is smaller than the radius of the cover body (2), just when the telescopic cylinder (3) is pushed up to a short distance of 1 The cover body (2) can be lifted up at a large angle, so that the small telescopic cylinder (3) not only occupies space, but also achieves a very positive effect. thing It can be.
[9] The first pillow block (54) for adjusting the thickness between the support part (5) and the bottom surface of the cover body (2) is provided, and the second combination part (32) and the cover body (2) A second pillow block (34) for adjusting the thickness between the bottom surfaces is provided, and from the first pillow block (54) and the second pillow block (34), one surface of the support component (5), and It can be avoided that the reinforcing structure (24) on the bottom surface of the telescopic cylinder (3) and the cover body (2) is brought into conflict.
[10] The fixing part (41) of the safety device (4) can be inserted into the positioning hole (21) of the cover body (2) and the screw hole (42) of the fitting block is screwed. The cover body (2) and the base (1) produce a strong coupling effect, and the upper peripheral edge of the fixing part (41) has a waterproof rubber ring (44), so that liquid oozes into the positioning hole (21). Can be prevented.

The perspective view of the manhole cover in one embodiment of this invention Exploded perspective view of the manhole cover Sectional view when the manhole cover is closed Sectional view when the manhole cover is opened Cross section of conventional manhole cover

  Next, the form for implementing this device is demonstrated using figures. FIG. 1 is a perspective view of a manhole cover according to the present invention, and FIG. 2 is an exploded perspective view of the manhole cover. 3 is a cross-sectional view when the manhole cover is closed, and FIG. 4 is a cross-sectional view when the manhole cover is opened.

  As shown in FIGS. 1 and 2, the manhole cover includes an annular base (1), a cover body (2) that covers and seals the base (1), a base (1), and a cover body (2). One end is coupled to a predetermined position on the inner periphery of the base (1) via a pivot hub set (pivot member), and the other end is pivoted to a predetermined position on the bottom surface of the cover body (2). Connected via a set (pivot member) between the position where the cover body (2) covers and seals the base (1) and the position where the cover body (2) rises on the edge of the base (1) Is supported between the base part (1) and the cover body (2), and one end is coupled to a predetermined position on the inner periphery of the base (1) via a pivotal support member. The other end is coupled to a predetermined position of the bottom surface of the cover body (2) via a pivot member, and the cover body (2) is covered and sealed with the base (1). The telescopic cylinder (3) that presses from the position where it rises onto the edge of the base (1), and the side opposite the support part (5) between the base (1) and the cover body (2) And a safety device (4) for connecting and locking the base (1) and the cover body (2).

  As shown in FIG. 3, the base (1) has an annular groove (14) formed on the top surface, and a waterproof gasket (15) is fitted into the groove (14).

  As shown in FIG. 3, the cover body (2) has a sufficient area to cover the top surface of the base (1), and the annular groove (14) of the base (1) is covered by the cover body (2). It has come to be. Further, the bottom surface of the cover body (2) has a reinforcing structure (24) as shown in FIG. The reinforcing structure (24) includes a reinforcing beam (241) formed radially in the radial direction, a plurality of annular flanges (242) formed concentrically with the center of the cover body (2), and a cover body. (2) It is comprised with the centripetal annular collar (243) formed close to the center.

  As shown in FIG. 2, the support component (5) is composed of a pair of two members. Each of the support parts (5) extends in the horizontal direction and is coupled to the bottom surface of the cover body (2). ) And a bent portion (52) bent into a substantially U shape, and a hinge portion (53) formed at the end of the bent portion (52) and coupled to a predetermined position on the inner periphery of the base (1). These three parts are formed by integral molding. The hinge portion (53) at one end of each member is inserted into a slot (12) (recess (12)) formed at the rear end of the inner peripheral surface of the base (1) and is pivotally supported on the inner wall surfaces on both sides thereof. The fixed portion (51) is connected to the bottom surface of the cover body (2) via a first pillow block (54) for adjusting the distance.

  The telescopic cylinder (3) is disposed between the members of the support component (5), and one end of the telescopic cylinder (3) projects downward toward the lower part of the slot (12) (recess (12)). The other end is coupled to the bottom surface of the cover body (2) via a pivot member. The pivot members for connecting the telescopic cylinder (3) to the base (1) and the cover body (2) are respectively a first and second combination parts (31), (31), (a) comprising a pair of hinge members and hinge pins. 32) is adopted. The first combination component (31) is fixed to the front side of the convex block (11) protruding from the lower portion of the base (1). In this case, the substantially L-shaped adjustment block (33) is arranged with the vertical plate of the adjustment block (33) on the front surface of the convex block (11), and the horizontal plate of the adjustment block (33) is arranged on the convex block (11). Fixed to the bottom surface and disposed on the convex block (11), the first combination part (31) is fixed to the vertical plate of the adjustment block (33). The second combination part (32) is fixed to the bottom surface of the cover body (2). In this case, as shown in FIG. 3, the second combination part (32) is located within the range of the centric annular collar (243) of the cover body (2), and the second combination part (32) and the cover body. A second pillow block (34) for adjusting the interval is interposed between the bottom surface of (2) and fixed.

  As shown in FIG. 2, the safety device (4) protrudes toward the support component (5) at the front end (a predetermined position facing the support component (5)) of the inner periphery of the base (1), and moves up and down. A block (43) having a screw hole (42) on the surface, a positioning hole (21) provided in the front edge of the cover body (2) corresponding to the block (43), and a positioning hole (21). A screw-type fixing part (41) that can be screwed into the screw hole (42), and a waterproof rubber ring that is arranged and fixed around the fixing part (41) and prevents the liquid from penetrating into the positioning hole (21). 44).

  In this way, as shown in FIG. 4, the manhole cover is configured so that the cover body (2) is supported by the support component (5) and the pressing force of the telescopic cylinder (3) by unlocking the safety device (4). Thus, the cover body (2) is automatically tilted in the opening direction, and is raised on the edge of the base (1).

  As described above, in this manhole cover, the hole (opening) of the base (1) can be sealed by covering the base (1) with the cover main body (2). ) And the base (1) are connected and locked by the safety device (4), and the telescopic cylinder (3) is compressed and maintained in this state, and the cover body (2) is moved upward by the telescopic cylinder (3). The cover body (2) can be safely kept in a sealed state. In addition, from this state, when a construction-related worker releases the safety device (4), the telescopic cylinder (3) in the compressed state expands and the cover body (2) is automatically moved by the accumulated pressure. Therefore, it is not necessary for a construction-related worker to move and carry the cover body (2), saving the operator's force and eliminating the burden on the worker. Further, in this case, the support part (5) for connecting the cover body (2) and the base (1) is rotated as the cover body (2) is pushed up by the telescopic cylinder (3), and the telescopic cylinder (3) is rotated. As the cover body (1) rises on the edge of the base (1) at a predetermined inclination angle and is supported by the support component (5), the cover body (2) is automatically lowered. Therefore, this rising state can be reliably maintained.

  In the case of this manhole cover, an annular groove (14) is formed on the top surface of the base (1), and the cover body (2) has a sufficient area to cover the top surface of the base (1). Since the annular concave groove (14) is covered by the cover body (2), a phenomenon in which a vacuum is generated between the base (1) and the cover body (2) and adsorbed can be avoided, and the cover body (2 ) Can be caused smoothly. Further, the annular groove (14) can prevent water from entering by temporarily shutting off water when liquid infiltrates between the base (1) and the cover body (2). Further, since the area of the cover body (2) is large enough to cover the annular concave groove (14), there is no groove or gap for embedding miscellaneous goods or dust on the base (1). The surface of the manhole cover can be kept clean. In this case, since the waterproof gasket (15) is fitted in the annular groove (14), even if liquid flows into the annular groove (14), it flows into the base (1). It is possible to prevent the water penetration into the manhole cover.

  Also, in the case of this manhole cover, the bottom surface of the cover body (2) has a reinforcing structure (24), and the reinforcing structure (24) is radiated radially in the radial direction, and the cover body. (2) A plurality of annular collars (242) formed concentrically with the center of the center, and an centripetal annular collar (243) formed close to the center of the cover body (2). Therefore, the structure of the cover body (2) can be made more rigid, and the pressure from the outside of the cover body (2) can be dispersed to withstand the pressure. Further, the second combination part (32) at the other end of the telescopic cylinder (3) is oriented with a distance (L) from the center of the centric annular saddle (243) and the cover body (2). Since the telescopic cylinder (3) is pivotally supported in the annular ring (243), the telescopic cylinder (3) is made shorter than the radius of the cover body (2), and the telescopic cylinder (3) is pushed up by a short distance. The cover body (2) can be pushed up to a sufficiently large angle. This small telescopic cylinder (3) reduces space occupancy and has a very good push-up effect.

  In the case of this manhole cover, the support component (5) is a connecting member for connecting the cover body (2) and the base (1), and is composed of a pair of members. One end of each of these members is the base (1). Inserted into the recess (12) formed on the inner peripheral surface of the inner surface of the inner surface of the support member (5) and connected to the inner surfaces of both sides via pivot members, and the telescopic cylinder (3) is disposed between the members of the support component (5) Since one end thereof is coupled to the convex block (11) protruding downward from the lower portion of the concave portion (12) via a pivotal support member, the cover body (2) and the base (1) are stably coupled. be able to. In this case, when the cover body (2) covers the base (1), the support component (5) is introduced into the slot (12) of the base (1). It can be stored and concealed in the slot (12) of (1), so that there is no problem due to the support component appearing in the opening. The lower block (11) of the slot (12) can support the telescopic cylinder (3) as an application force. Both the telescopic cylinder (3) and the support component (5) are on-line (same location). Can be arranged.

  Further, in the case of this manhole cover, the support component (5) is bent in a substantially U shape continuously to the fixed portion (51) extending in the horizontal direction coupled to the bottom surface of the cover body (2) and the fixed portion (51). A bent portion (52) formed, and a hinge portion (53) formed at the end of the bent portion (52) and coupled to a predetermined position on the inner periphery of the base (1). Since the support part (5) is formed by integral molding, the fixing part (51) extending in the horizontal direction of the support part (5) can be easily coupled to the bottom surface of the cover body (2), and a U-shaped curve (winding). The bent part (52) avoids contact with the edge of the base (1) when the cover body (2) is raised, and the straight hinge part (53) is pivoted on both sides of the slot (12). Can be supported.

  In the case of this manhole cover, the telescopic cylinder (3) is an arm (raising arm) used to push up the cover body (2), and is a pivot member for coupling to the base (1) and the cover body (2). Are first and second combination parts (31) and (32) each composed of a pair of hinge members and hinge pins, and the first combination part (31) is a convex block projecting from the lower part of the base (1) ( 11) is fixed to the front surface side, and the second combination part (32) is fixed to the bottom surface of the cover body (2), so that the telescopic cylinder (3) can be allowed to expand and contract, The length can be changed by flexible expansion and contraction as the angle of the main body (2) changes. In this case, the substantially L-shaped adjustment block (33) is arranged such that the vertical plate of the adjustment block (33) is placed in front of the convex block (11) of the base (1), and the horizontal plate of the adjustment block (33) Since the first combination part (31) is fixed to the vertical plate of the adjustment block (33), the first combination part (31) is fixed to the bottom surface of the convex block (11) and disposed on the convex block (11). 14), the distance between one end of the telescopic cylinder (3) and the convex block (11) can be adjusted, and when the other end of the telescopic cylinder (3) extends, the support component (5) You can avoid conflicts. Further, in this case, a first pillow block (54) for adjusting the interval is provided between the fixed portion (51) of the support component (5) and the bottom surface of the cover body (2), and a telescopic cylinder ( 3) Since there is provided a second pillow block (34) for adjusting the distance between the second combination part (32) for coupling and the bottom surface of the cover body (2), these pillow blocks are provided. By (54) and (34), it is possible to avoid interference (conflict) between one end of the support component (5) and the telescopic cylinder (3) and the reinforcing structure (24) on the bottom surface of the cover body (2).

  In the case of this manhole cover, the fixing part (41) of the safety device (4) is inserted into the positioning hole (21) of the cover body (2), and the fixing part (41) is inserted into the screw hole of the block (43). Since it is tightened to (42), the cover body (2) and the base (1) can be firmly locked without the cover body (2) being detached. In this case, since the waterproof rubber ring (44) is disposed on the upper peripheral edge of the fixed component (41), it is possible to reliably prevent liquid from seeping out from the positioning hole (21) of the cover body (2). .

  As described above, the structure, characteristics, roles and influences of the present invention have been explained in detail by the examples shown in the drawings. The above is merely a preferred embodiment and is not used to limit the scope of the utility model registration request, but all modifications consistent with the intention of the present invention are all registered as utility model registrations of the present invention. It belongs to the scope of claims.

DESCRIPTION OF SYMBOLS 1 Base 11 Bump 12 Slot 13 Built-in slot 14 Groove | grooving groove | channel 15 Waterproof gasket 2 Cover main body 21 Positioning hole 24 Reinforcement structure 241 Reinforcement beam 242 Annular collar 243 Oriented annular collar 244 Reinforcement block 25 Insertion block 3 Telescopic type Cylinder 31 First combination part 32 Second combination part 33 Adjustment block 34 Second pillow block 4 Safety device 41 Fixing part 42 Screw hole 43 Insertion block 44 Waterproof rubber ring 5 Support part 51 Fixing part 52 Bending part 53 Joint hinge part・ Pivot connecting part 54 1st pillow block 71 Old cover plate 72 Old base 73 Hook hole 74 Gap 75 Dust etc.

Claims (10)

An annular base (1);
A cover body (2) for covering and sealing the base (1);
Arranged between the base (1) and the cover body (2), one end is coupled to a predetermined position on the inner periphery of the base (1) via a pivot member, and the other end is the cover body ( 2) A position where the bottom surface of the cover (2) is coupled and sealed to a predetermined position on the bottom surface of the base (1) and a position where the cover body (2) is raised on the edge of the base (1). A support part (5) that is tiltably supported between
Between the base (1) and the cover body (2), one end is coupled to a predetermined position on the inner periphery of the base (1) via a pivot member, and the other end is the cover body (2). The bottom surface of the base (1) is coupled to a predetermined position via a pivot member, and the cover body (2) is pressed from a position where the base (1) is covered and sealed to a position where the cover (2) is raised on the edge of the base (1). A telescopic cylinder (3),
A safety device provided between the base (1) and the cover body (2) on the opposite side of the support component (5), and connecting and locking the base (1) and the cover body (2). (4) and
With
By releasing the lock of the safety device (4), the cover body (2) is tilted in the direction to open the cover body (2) by the support guide of the support component (5) and the pressing force of the telescopic cylinder (3). And raised on the edge of the base (1),
Manhole cover characterized by that.   An annular groove (14) is formed on the top surface of the base (1), and the cover body (2) has a sufficient area to cover the top surface of the base (1). The manhole cover according to claim 1, wherein the cover body is covered by the cover body.   The manhole cover according to claim 2, wherein the waterproof gasket (15) is fitted into the annular groove (14).   The support part (5) is composed of a pair of two members, and one end of each of these members is inserted into a recess (12) formed on the inner peripheral surface of the base (1), and pivot members are provided on the inner surfaces on both sides thereof. The telescopic cylinder (3) is disposed between the members of the support component (5), and one end of the telescopic cylinder (3) is pivoted to a convex block (11) projecting downward at the lower part of the concave portion (12). The manhole cover according to claim 1, wherein the manhole cover is coupled via a support member.   Each member of the support part (5) is bent in a substantially U-shape continuously from the fixed portion (51) extending in the horizontal direction coupled to the bottom surface of the cover body (2) and the fixed portion (51). A portion (52) and a hinge portion (53) formed at the end of the bent portion (52) and coupled to a predetermined position on the inner periphery of the base (1), and these three portions are integrally formed. The manhole cover according to claim 4 formed.   The pivot members for connecting the telescopic cylinder (3) to the base (1) and the cover body (2) are first and second combination parts (31), (32) each consisting of a pair of hinge members and hinge pins. ), The first combination part (31) is fixed to the front surface of the convex block (11) protruding from the lower part of the base (1), and the second combination part (32) is attached to the bottom surface of the cover body (2). The manhole cover according to claim 5, which is fixed.   A substantially L-shaped adjustment block (33) is arranged with the vertical plate of the adjustment block (33) in front of the convex block (11) of the base (1), and the horizontal plate of the adjustment block (33) is placed on the convex block ( The manhole cover according to claim 6, wherein the manhole cover is fixed to the bottom surface of 11) and disposed on the convex block (11), and the first combination part (31) is fixed to a vertical plate of the adjustment block (33). .   The bottom surface of the cover body (2) has a reinforcing structure (24), and the reinforcing structure (24) is the same as the center of the cover body (2) and the reinforcing beam (241) formed radially in the radial direction. A plurality of annular collars (242) formed on the core and an centripetal annular collar (243) formed in the vicinity of the center of the cover body (2), the second combination component ( The manhole cover according to claim 6 or 7, wherein 32) is installed and fixed within a range of an centric annular collar (243) of the cover body (2).   A first pillow block (54) is provided between the fixed part (51) of the support component (5) and the bottom surface of the cover body (2) to couple the telescopic cylinder (3). The manhole cover according to claim 6, wherein a second pillow block (34) for adjusting the distance is provided between the second combination part (32) and the bottom surface of the cover body (2).   The safety device (4) protrudes toward the support component (5) at a predetermined position facing the support component (5) on the inner periphery of the base (1), and has a block (43) having a screw hole (42). And a hole (21) provided at the edge of the cover body (2) corresponding to the block (43), and a screw type inserted into the hole (21) and screwed into the screw hole (42). 10. The fixing part (41) of claim 1, and a waterproof rubber ring (44) disposed around the fixing part (41) and preventing penetration of liquid into the hole (21). A manhole cover according to any one of the above.

Images