JPH042210Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mechanism that allows the position of a lid hinge in an underground structure such as a manhole to be moved before and after construction.

(Prior art) When the cover of a manhole, etc. is hinged, a retaining ring into which the hinge fitting is inserted is provided integrally with the frame, so the direction in which the cover opens is uniquely determined. The relationship of a certain hand or side mass to a step is determined. On the other hand, during construction, the opening and closing direction of the lid body is determined by the direction of flow and the direction of travel of the vehicle, so the positional relationship with the above-mentioned handles and steps is not necessarily compatible. Moreover, after that,
If the location of curbs, guardrails, etc., lanes, etc. change and the conditions on the road and ground change, the lid may touch the curb or guardrail or come out into the opposite lane when opening the lid, so to avoid this. If you want to change the opening direction of the lid after the fact, conventionally it would be necessary to remove the frame and replace it. Note that the flow direction is an issue because the hinge position may be specified in relation to it.

(Technical issue) Therefore, the present invention is designed to enable the opening direction of the lid to be changed without changing the frame even if the ground conditions change before or after construction. To provide a movable hinge mechanism for an underground structure in which several positioning parts are provided on the inner peripheral edge of a receiving frame body, and the mounting position of a retaining ring for receiving a hinge fitting can be easily changed.

(Technical Means) The present invention which achieves the above-mentioned object provides two or more positioning parts 3 at regular intervals on the inner peripheral edge of the frame 2 that receives the lid 1, and the hinge fitting 4 of the lid 1 is provided with two or more positioning parts 3 at regular intervals. This is a movable hinge mechanism for an underground structure in which a receiving retaining ring 5 is provided with a portion 6 that engages with the positioning portions 3, and is tightened to a frame 2 by a bolt 7 inserted through the portion 6.

(Function of the invention) In the present invention, two or more positioning parts 3 are provided on the inner peripheral edge of the frame 2 at regular intervals, so that the retaining ring 5 that receives the lid hinge metal receiver 4 can be easily attached and detached by the bolt 7. It can be changed to . As the positioning portion 3, a recess 8 or a stepped portion 10' can be provided as illustrated in each figure, and the retaining ring 5 has a convex engaging portion 6A and a concave engaging portion 6B that engage with the retaining ring 5. 5 is firmly fixed without moving, and the lid 1 can be opened and closed stably.

(Example) To explain with the illustrated example, a circular manhole iron cover is shown as the lid 1, and the frame 2 that receives it has two or more positioning parts 3A at approximately 90 degree intervals on the inner peripheral edge. 3B... is provided to attach the retaining ring 5 which is a lid hinge metal holder, and each part 3A,
3B... is provided with an uneven structure that engages with the retaining ring base. The retaining ring 5 is formed into a frame shape having a receiving hole 9 for receiving the hinge metal fitting 4 of the lid body 1, and is an engagement piece having a guide recess 11 that engages with the inner protrusion 10 of the frame body 2 at the upper part of the base side. A pair of 12 are provided. The engagement structure shown in FIGS. 1 and 2 consists of a recess 8 provided in the positioning portion 3 and a convex engagement portion 6A of the retaining ring 5, and the engagement structure shown in FIG. It is constituted by an engaging portion 6B formed of a concave inclined surface provided at the base of the retaining ring 5, and an inclined stepped portion 10' provided at the inner peripheral edge of the frame body 2. 13 is a through hole for the bolt 7 passing through the main body base 6; 14 is a through hole for the same bolt 7 provided in the frame recess 8; 15 is a nut;
Further, 16 is a handle installed on the side of the basic positioning part 3A, and 17 is a projection for preventing the hinge metal fitting 4 from slipping out.
Note that there is a structure in which a locking mechanism 18 is provided in the lid 1 and the frame 2, and among these, an engaging recess 19 similar to the recess 8 is formed on the inner circumferential surface of the frame 2 and is engaged with the locking rod 20. In the case of the one having the above-mentioned shape, both the recesses 8 and 19 can be used in common.

When installing, take into consideration the direction of the flow and the direction of travel of the car so that the lid can be opened in a direction that does not interfere with the opening and closing of the lid 1 at that location, and also take into account the position of the step, and set the basic position to, for example, 3A. However, after that, a curb or guardrail was formed in the direction of the positioning part 3A, making it impossible or inconvenient to open the lid, or the open lid 1 would be exposed to the opposite lane of the changed lane. If the conditions of
Further, the retaining ring 5 is moved to the positioning portion 3B in a direction that is as compatible as possible with the changes in the conditions.

(Effect of the invention) Therefore, according to the invention, the retaining ring 5 can be attached to an appropriate position among the two or more positioning parts 3 provided at regular intervals on the inner peripheral edge of the frame 2. Therefore, during construction, the retaining ring 5 can be installed at the most appropriate position depending on the flow direction, vehicle running direction, step, etc. Furthermore, if the ground conditions etc. change after construction, the frame 2 can be installed as before. It has the effect of being able to change the opening direction of the lid without having to do any work to change the attachment, and since the retaining ring 5 is provided with a part 6 that engages with each positioning part 3, it is not only easy to install, but also easy to install. It can be firmly fixed by one bolt 7 and the above-mentioned engagement structure, and even if it is moved, the lid 1 can be opened and closed in exactly the same way as before the movement.

[Brief explanation of drawings]

The drawings show a movable hinge mechanism for underground structures according to the present invention, and FIG. 1 is an enlarged perspective view of the main part of the first embodiment, FIG. 2 is a partial sectional view, and FIG. 3 is a part of the lid body. FIG. 4 is a partial sectional view of the second embodiment, and FIG. 5 is a sectional view of the locking mechanism. 1... Lid body, 2... Frame body, 3... Positioning part,
4... Hinge fitting, 5... Removal retaining ring, 6A, 6B...
Engaging portion, 7... bolt, 8... recess, 10'...
...Danbe.

Claims (1)

[Claims for Utility Model Registration] (1) Two or more positioning portions 3 are provided at regular intervals on the inner peripheral edge of the frame 2 that receives the lid 1, and a retainer that receives the hinge fitting 4 of the lid 1 is provided. The ring 5 is provided with a portion 6 that engages with the positioning portion 3, and the frame 2 is secured by a bolt 7 inserted through the portion 6.
A movable hinge mechanism for underground structures that is tightened by. (2) The movable hinge mechanism for an underground structure according to claim 1, wherein the positioning portion 3 is formed with a recess 8 that engages with the convex engaging portion 6A. (3) The movable hinge mechanism for an underground structure according to claim 1, wherein the positioning portion 3 is provided with a stepped portion 10' that engages with the concave engaging portion 6B.