SK281935B6 - Cover for a fire hydrant shaft - Google Patents

Abstract

The cover (6) is surrounded by a supporting frame (4) with guide rails (8) along two opposite side walls. The cover has upper (58) and lower (56) lugs on each side to engage with the guide rails, mounted on supporting legs (52) extending from the cover's lower surface and perpendicular to it. Each leg has a flat section (59) which prevents any pivoting of the cover as it is raised or closed. Each guide rail has a rear section (28C) which frees the cover, while each of the frame's opposite side walls has a locking rib (36) which is situated at least partially above the upper lug forming a chicane for the lugs to pass through.

Description

The invention relates to a hatch, in particular for a technical opening of a hydrant, comprising a support frame defining a passage and a removable closing lid.

BACKGROUND OF THE INVENTION

It is often necessary to make passages on the soil surface, for example on the road surface, to allow access to technical openings.

These technical openings may be formed, for example, by drainage wells or sewer inlet ducts provided on a roadway or ground spaces and adapted to accommodate fire brigade valves or water tanks or to clean cable blocks.

Such hatches usually comprise a frame whose walls define the passage and are provided at their upper part with a circumferential support rib on which the lids rest in the closed position. A hole is usually provided in the lid for introducing the lid withdrawal tool.

After insertion of the tool, the lid can be removed by lifting it and possibly sliding along the circumferential rib to lay flat on the ground next to the frame.

Such devices have various disadvantages.

In fact, the lid can be placed somewhere after it has been removed, or it can be maliciously removed from the frame.

Furthermore, if the support frame does not have a symmetrical circumference, it is difficult to determine the correct fit of the lid on the frame when it is placed back.

In other cases, the pivoting of the lid may become necessary due to the fact that within the hatch the individual members are positioned arbitrarily and may interfere with the age if incorrectly fitted.

The purpose of the invention is to overcome these drawbacks by providing a hatch in which a lid can be opened which is removable even if it is integral with the support frame when operating the hatch.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The present invention provides a hatch of the aforesaid type comprising a guide rail on each of its two side walls and a side guide on each side comprising two guide rail supports, the upper support of which slides on the upper side of the rail. against the lid and the lower support is adapted to abut the underside of the rail in case the lid is raised to its at least partially open position.

According to particular embodiments of the invention, the hatch may have one or more of the following features:

- the supports are provided on support legs running under the lower surface of the lid and perpendicular to it, laterally on each side,

- the props have a planar section extending longitudinally from the guide rails in order to prevent any major rotation of the lid,

- each guide rail has a rear end for releasing the lid, and each side wall comprises a rear locking rib located at least partially above the upper support when the support is outside the lid release end, the release end and the locking rib defining a lid for the lid supports,

- the locking rib has an elongated shape and is inclined downwards and forwards in the direction of said release or free end,

- the lid comprises in its front part a lock for securing the lid in a closed position against the frame, the latch bolt adapted to cooperate with a retaining surface provided in the frame wall,

- each guide rail comprises a forward rectilinear section parallel to the plane of the lid in the closing position and a rearward inclined downwards and backwards from the rectilinear section to the free end to release the lid,

- the supports are at least partially beyond the end to release the lid when the lid is in the closing position,

- each guide rail contains a bearing surface for the lid when in the closing position,

- the lid comprises at each lateral edge of its lower side an inclined support surface adapted to cooperate with the upper side of the inclined section of the guide rail forming the support surface,

- each upper support is located at a distance from the upper part of the lid which is less than the sum of the maximum lid thickness and the distance between the upper side of the front part of the guide rail and the road surface surrounding the support frame; which is greater than the sum of the maximum lid thickness and the distance between the lower side of the front of the guide rail and said road surface so that the lid can rest on that surface in the maximum opening position,

- the lid has arcuate release surfaces at the front of its lower part,

- the supports are located near the rear end of the lid in terms of its opening,

- the lid and the support frame are made in one piece by a casting process.

The invention also relates to the frame and lid for the lid according to the invention.

The invention will now be explained by way of example with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a top plan view of a hatch according to the invention, the lid being half-closed and half-open;

In FIG. 2 is a sectional view along line II-II in FIG. 1, wherein the lid is in the closed position.

In FIG. 3 is a cross-sectional view along the line ΠΙ-III in FIG. 2 and FIG. 4 is a sectional view along line II-II in FIG. 1, wherein the lid is in the open position.

DETAILED DESCRIPTION OF THE INVENTION

The hatch 2 shown in the drawings is a hydrant entry box. It includes a support frame 4 and a closing lid 6.

The support frame 4, made in one piece by casting, comprises two side walls 8, 10, approximately vertical and parallel, which extend on one side of the median longitudinal plane P. These side walls 8, 10 are connected to each other by two walls 12, 14, extending almost vertically, parallel to each other and perpendicular to the plane P to define the passage 16. The walls 12 and 14 form a front wall or a retaining wall, considering the opening sense F1 shown in FIG. 1 and 2.

SK 281935-6

The height of the walls 8 to 14 is defined in the hatch use function, which walls may be sized to protect the mechanical device, for example a valve marked K, as schematically indicated in FIG. Second

As can also be seen in FIG. 2 to 4, the walls 8 to 14 are extended at their lower part by an outwardly directed peripheral flange 18. This circumferential flange 18 comprises elongate-shaped sealing openings 20 distributed over the entire periphery of the frame.

The reinforcements 22 connect the upper surface of the flange 18 to the side walls 8-14.

The inner sides of the walls 12, 14 carry support ribs 24 and 26, respectively, made of the same material and extending along the length of each wall, within the passage 16 at their upper part. The front rib 24 is elongated on the side walls 8 and 10 by guide rails 28 which are identical to one another. The rib 24 also has two identical grooves 24A at each of its ends elongated by guide rails 28.

The guide rails 28 have the same thickness as the rib 24. After the rib 24, a first forward rectilinear portion 28A extends parallel to the lid plane when in the closed position and is extended by a section 28B tilted back and down. These inclined sections terminate at a free end 28C which is spaced from the wall 14.

The rear rib 26 is similarly elongated on each of the side walls 8 and 10 by short identical rib sections 32, elongated by two identical locking ribs 36, inclined downward and forward in the direction of the free ends 28C, but terminated at a short distance therefrom.

In addition, the rear rib 26 is provided with two equal recesses 26A at each of its ends elongated by the rib sections 32. These recesses 26A face the recesses 24A of the front rib 24.

The lid 6, shown in all figures, is made in one piece by a casting process and has an outer periphery that fits with little circumferential clearance into the passage 16. It has a flat top surface 40 on which anti-skid motifs 42 are located, as well as marks 44 which they may, for example, indicate the nature of the members placed under the hatch and the like.

Along the edges of the underside, the lid 6 is provided with a circumferential abutment surface 46 that extends parallel to the top surface 40.

On its side edges extending on both sides of the plane P, the lid 6 is provided near its rear end with inclined support surfaces 48 supported by triangular ribs 50 extending perpendicular to the plane of the closing lid 6. These support surfaces 48 have a slope equal to the inclination of the inclined of the guide rail sections 28B.

In addition to the triangular ribs 50, support legs 52 are provided at the rear of the lid, which extend longitudinally, i.e. parallel to the plane P on each side and below the lid 6 along the peripheral support surface 46. These support legs 52 carry corner reinforcements 54 on their inner side. connected to the bottom surface of the lid.

On its outside, each support post 52 comprises a lower stop abutment 56 at its lower end as well as an upper sliding abutment 58 provided above and spaced from the stop abutment 56. Between the two supports, there is an elongated planar section 59 whose height is greater than the thickness of the guide rails and whose longitudinal dimension is at least four times that height and is sufficient to prevent the lid from being pulled away by turning it when the lid is at least partially open.

Two rows of stiffening ribs, all designated 60, extend perpendicular to each other on the lower face of the lid 6. Some of the longitudinal ribs have rounded back surfaces 62 at their forward end having a curved profile and extending almost on a quadrant with a large radius of curvature.

In this front part of the lid is provided a hole 64 for gripping the lid.

In FIG. 2, the lid is shown in its closed position.

In this position, the lid support surfaces 46 rest on the upper sides of the support ribs 24 and 26 as well as on the upper sides of the rectilinear guide rail sections 28A, thus forming the support surfaces. Likewise, the inclined support surfaces 48 rest on the upper sides of the inclined guide rail sections 28B forming the bearing surfaces.

The lid 6 is thus able to withstand the considerable stresses caused, for example, by the passage of heavy vehicles, in the closed position.

In the closed position shown in side view of FIG. 2, the support legs 52 overlap with the free ends 28C of the guide rails 28 and with the locking ribs 36. In particular, on each side the sliding support 58 is partially below the lower end of the locking rib 36 and partly above the free or release end 28C, partially under each of these members.

To open the lid, the operator introduces a suitable tool into the withdrawal opening 64 to allow the end of the lid 6 provided with this opening to be released from the support frame 4 until the stiffening ribs 60 surrounding the protruding portions of the valve K are above it. This release of the front part of the lid 6 results in the stop supports 56 engaging under the guide rails 28, so that the sliding supports 58 engage under the upper side of the guide rails.

After this release, pulling on the lid 6 in the sense of the arrow F1 shown in FIG. 2 and the corresponding opening direction, sliding of the lid 6 relative to the support frame 4. The sliding supports 58 then rest on the upper sides of the inclined guide rail sections 28B, resulting in a gradual lifting of the lid 6 against the support frame 4. When the sliding supports 58 reach the rectilinear guide portion 28A. of the rails, these supports slide further on the upper sides of these rectilinear portions until the lid 6 is in the maximum opening position shown in FIG. 4. In this maximum opening position, the front end of the support legs 52 in the recesses 24A provided in the web 24 allows for a substantial opening of the lid.

In the exemplary embodiment shown in the drawings, the distance between the lower portion of the sliding support 58 and the upper side 40 of the lid 6 is less than the sum of the maximum lid thickness and the distance between the upper surface of the front rail and the road surface S surrounding the support frame. flush with the top surface of the frame. In addition, the distance between the upper portion of the stopper supports 56 and the upper side of the lid is greater than the sum of the maximum lid thickness and the distance between the lower surface of the front of the guide rail and the road surface S surrounding the support frame.

Thus, the lid can be laid flat on the road surface S as shown in FIG. 4th

It should be noted that once the stop abutments 56 are engaged under the guide rails 28, 30, it is impossible to pull the closure lid 6 away from the support frame 4. When attempting to lift the lid 6 to pull it off, the lower stop abutments 56 hit the underside of the guide rails. rails and towing impossible. When attempting to rotate the lid 6 about the vertical axis to release the rail supports from engagement, the planar sections 59 of the support legs 52 also come into contact with the inner edges of the rails, preventing any major rotation and preventing the lid from pulling off.

From the beginning of the hatch opening it is thus impossible to pull the closing lid and thus prevent its loss or theft.

To close the closing lid, it is sufficient to slide it back in a direction opposite to the arrow F1, for example by pushing parallel to the road surface of the worker's feet.

As a result of this push, the slide supports 58 follow the upper sides of the guide rails 28 until the lid is in the closed position as shown in FIG. Thus, the rear end of the support legs 52 is partially in the recesses 26A of the ribs 26.

In this closing phase, the release back surfaces 62, having a considerable radius of curvature, ensure that the road will not be damaged when the lid slides on its surface, while repositioning the lid in place is facilitated by easy passage of the release surfaces 62 above the frame edge and support rib 24. a sufficiently inclined position of the lid at the end of closing to prevent contact between the fins 60 and the upper portions of the valve K.

Removing the removable lid 6 is difficult for persons who are inexperienced or not equipped with the locking rib 36. If someone tries to lift the lid while in the closing position, the upper sliding struts will strike the lower end of the inclined locking ribs 36, which loose the ends 28C of the guide rails constitute an obstacle to the supports 56 and 58.

After removal of the lid 6, it is necessary to lift the lid by introducing a suitable tool into the withdrawal opening 64, then release the slight lid in the sense of the arrow F1 and then introduce a second suitable de-stripping tool, for example screwdriver, under the rear support surface 46. the tool makes it possible to lift the part of the lid 6 which is closer to the supports.

Thus, by simultaneously lifting both ends of the lid, it is possible to release the sliding supports 58 from the upper inclined sections 28B of the guide rails 28 and then by moving the lid in a direction opposite to the arrow F1, move the sliding supports 58 above the locking ribs 36.

Thus, by further lifting the lid 6 and moving it again in the sense of the arrow F1, it is possible to extend the stopper support 56 over the inclined guide rail sections 28B. Thus, the lid 6 can be completely pulled away from the support frame 4.

Obviously, pulling the lid off the support frame is relatively difficult because two tools and different steps are required, which requires a good knowledge of the entire device.

To reposition the lid 6 on the support frame 4, it is sufficient to place the lid in its open position where the bottom of the lower abutments 56 rest on the upper side of the guide rails 28 and then push them in the direction opposite to the arrow F1 until the lid assumes its closed position. 56 and 58 pass sequentially through the release or free ends 28C, guided by the inclined sections 28B.

It will be appreciated that the distance between the free end 28C and the lower end of the locking rib 36 is adjusted to allow the gradual passage of the abutments 56 and 58 with very little play, according to the intended path, almost rectilinear. Moreover, due to the orientation of the locking ribs 36 and the inclined sections 28B, it is virtually impossible to pull the lid off by attempting to relocate along the same path but in the opposite direction. The weight of the lid and poor visibility make this procedure very difficult.

Thus, to pull off the lid, it is necessary to proceed as described and to make reciprocating movements while raising the lid.

According to an embodiment not shown in the drawings, it is possible to mount a locking lock below the withdrawal opening 64, the latch of which is adapted to cooperate with the underside of the support rib 24 forming the retaining surface.

Such a lock makes it possible to lock the lid 6 on the support frame 4 and thus prevent opening and removal of the lid when the lock is locked.

PATENT CLAIMS

Claims (14)

A hatch, in particular for a technical opening of a hydrant, comprising a support frame (4) restricting the passage (16) and a removable closing lid (6), and wherein the frame (4) comprises a guide rail on each of its two upper walls (8,10). (28), characterized in that the lid (6) comprises on each side two supports (56, 58) for a guide rail (28), of which the upper support (58) for sliding on the upper side of the rail during opening movements by sliding forward and in the closing movements by sliding backwards against the lid (6) and the lower support (56) is adapted to engage the underside of the rail when the lid (6) is raised to its at least partially open position, the guide rail (28) ending at the rear of the lid ( 6) the free end (28C) and the two side walls (8, 10) each have a latching rib (36) at the rear, said free end (28C) and the latching rib (36) defining a transition to the lid supports (56, 58) - enable removal in vista eka. Manhole cover according to claim 1, characterized in that the locking rib (36) is positioned at least partially above the upper support (58) when the support is outside the lid release end (28C). Manhole according to claim 2, characterized in that the locking rib (36) has an elongated shape and is tilted down and forward in the direction of said release free end (28C). Manhole according to claim 1 or 2, characterized in that the supports (56, 58) are provided on support legs (52) running below the lower surface of the lid (6) and perpendicular thereto laterally on each side. Manhole cover according to claim 4, characterized in that the support legs (52) have a planar section (59) running longitudinally relative to the guide rails (28) to prevent a larger rotation of the lid (6). Manhole cover according to any one of the preceding claims, characterized in that the lid (6) comprises in its front part a lock for securing the lid (6) in the closed position against the frame (4), the latch latch adapted to cooperate with the retaining surface. (24) provided in the wall of the frame (4). Manhole cover according to any one of claims 1 to 6, characterized in that each guide rail (28) comprises a front rectilinear section (28A) parallel to the lid plane in the closing position and a rear portion (28B) inclined downwards and backwards from the rectilinear section (28A) to the free end (28C) to release the lid. Manhole cover according to any one of claims 1 to 7, characterized in that the supports (56, 58) are at least partially behind the end (28C) for releasing the lid when the lid is in the closing position. Manhole cover according to any one of claims 1 to 8, characterized in that each guide rail (28) comprises a bearing surface for the lid (6) when the lid is in the closing position. A hatch according to claims 7 and 9, characterized in that the lid (6) comprises at each lateral edge of its lower side an inclined abutment surface (48) adapted to cooperate with the upper side of the inclined guide rail section (28B) forming the support surface. Manhole cover according to any one of claims 1 to 10, characterized in that each upper support (58) is spaced from the top of the lid at a distance that is less than the sum of the maximum lid thickness and the distance between the upper side of the front of the guide rail and a road surface surrounding the support frame (4) and a lower support (56) is located from the upper side of the lid (6) at a distance greater than the sum of the maximum lid thickness and the distance between the lower side of the front of the guide rail (28) of the road surface so that the lid on this surface rests in the maximum opening position. Manhole according to claim 11, characterized in that the lid (6) has an arched release surface (62) on the front side of its lower part. Manhole cover according to any one of the preceding claims, characterized in that the supports (56, 58) are located near the rear end of the lid (6) in terms of its opening. Manhole cover according to any one of the preceding claims, characterized in that the lid (6) and the support frame (4) are produced in one piece by casting. 3 drawings SK 281935-6 F1 FIG. 2