JPH033644Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fixing structure for a lid for an underground structure.

A device of this type is known in Japanese Utility Model Application No. 57-202444, which shows a structure in which the hinge is not supported pivotally but is mounted by a swing prevention device. However, this anti-swing device requires a locking portion that presses into contact with the upper surface of the hinged metal object, and also has a complicated shape and a large number of parts.

The present invention relates to a fixing structure for a lid for an underground structure that prevents the lid from accidentally popping out and is housed horizontally in a frame that receives the lid. The aim is to provide a rational fixing structure that can be implemented with a simpler structure.

Therefore, the present invention includes a lid main body 1, a pair of mounting ridges 10 projecting parallel to the lower edge of the lid body 1, and an inner end opening recessed in the opposing side surfaces of each mounting ridge 10. A hinge fitting having a recessed groove 2 and a pair of shaft portions 4 protruding from both sides of the upper end, which are suspended from the lid body 1 by engaging with the recessed groove 2 and having a retainer 11 at the lower end;
It consists of a frame body 9 that supports the lid main body 1, and a retaining ring 8 that projects inside the frame body and engages with the retainer 11 of the hinge metal fitting, and the groove 2 has a linear shape,
The shaft portion 4 is inclined so that the inner end is lower than the outer end when the lid is closed.
It engages in the groove 2 and fits into the groove 2 from the inside,
It is characterized in that it is pivotally supported toward the closed outer end of the groove 2 by the tips of the left and right straight sides 5a, 5a of the fixed substantially U-shaped presser 5. This is a fixed structure for covers for underground structures.

To explain with the illustrated embodiment, the lid main body 1 is a circular manhole iron lid, and a pair of parallel mounting ridges 10 in the radial direction are integrally formed on the periphery of the lower surface of the lid body 1.
Linear grooves 2 are formed on opposing side surfaces of the protrusions 10, respectively, and are inclined so that the open inner end is lower than the closed outer end. Because of the inclination, the inner end is separated from the lid body 1, making it easier to attach the shaft portions 4 of the hinge fittings 3, 3' and the holding fitting 5. Each of the grooves 2, 2 is closed at the outer end, that is, the edge side of the lid body 1, and is open at the inner end, that is, the center side of the lid body 1.

The hinge metal fitting may be either a type 3 whose upper end is bent in the direction of the concave groove 2 or a straight type 3', and both have shaft portions 4, 4 at the upper end and a retainer and peg 11 at the lower end.
has. The straight hinge metal fitting 3' has a notch 13 that engages with a protrusion 12 protruding from the inner edge of the frame 9, so that it will not come off even if the lid body 1 is lifted upward, and the length of the notch 13 The thickness b is made smaller than the thickness a of the retaining ring 8 so that they do not mesh even if they come into contact when the lid is opened.

The presser 5 has a U-shape in plan so as not to impede the rotation of the hinge 3 having a bent upper end;
Both sides 5a, 5a fit into the grooves 2, 2, and their tips movably support the hinge 3, and the fastening member 7 is inserted into the through hole 5c of the base 5b.
A bearing portion 1 having both ends formed on the mounting member 10
4, 14 and fixed. This bearing part 14
In addition to the illustrated concave groove type, a normal bearing hole may be used. In that case, a normal bolt or nut may be used as the fixing pin 7. In the above embodiment, the frame body is illustrated as a receiving frame for receiving the cover body 1, which is a manhole iron cover, but the present invention is not limited to this, and can be similarly applied to other raising frames and the like. In each figure, 15 is the frame 9.
A notch 16 formed on the periphery of the frame body 9 is a receiving piece for the lid body 1 that protrudes from the inner periphery of the frame body 9.

Since the present invention is constructed as described above, the hinge fittings 3 and 3' engage the shaft portion 4 into the inclined linear groove 2 from the inner end remote from the lid body 1, and similarly The presser 5 can be fitted and attached to the lid body 1 easily, and the operation of assembling the lid body 1 to the frame body 9 in an openable and closable manner by hinges is facilitated. When opening the lid, pry up the other end of the lid body with a crowbar (not shown), and remove the hinge fitting 3 (in the case of 3', the protrusion 12 and notch 13).
The lid body 1 can be shifted and placed on the frame body 9 by pulling up the lid a little inside the retaining ring 8 while disengaging the lid (while disengaging from the lid). It can be covered. The hinge fittings 3 and 3' are made of two types that are compatible, and the one with a bent upper end has good workability when opening and closing.
The straight one 3' can effectively resist lifting from the inside, and both hinge fittings 3 and 3' can be connected to the fixing fitting 5.
It is pivoted and there is no risk of it coming off during normal handling such as opening the lid.

According to the present invention, the hinge fittings 3, 3' are attached by the presser 5, and the presser 5 is inserted into the groove 2 on both sides 5.
All you have to do is to fit a and 5a and fix it with the mounting member 7.
The open inner end of this groove 2 is lower than the outer end and is further away from the back surface of the lid main body 1, so the installation space is wide, and the straight shape makes it easy to insert. It is possible to solve the conventional problem that it is difficult to do.

As for the component parts, compared to the conventional hinge type structure, only one presser metal fitting 5 and its fixing member 7 are added, and the presser metal fitting 5 has a simple approximately U-shaped shape, so it is easy to manufacture. It is compatible with two types of hinge metal fittings 3 and 3', and is very easy to install and securely fixed.

The two types of hinge fittings 3, 3' are the presser side pieces 5a, 5.
Since the shaft portion 4 protruding on both sides is simultaneously supported by the tip of a, opening and closing can be performed stably.
and is also defined to be located deep in the groove 2,
Since the pivot point can be set as far as possible from the outside of the lid body 1, the lid opening operation becomes easy, and the overlap between the lid body 1 and the frame body 9 is small when the lid is opened. Can be widely exposed. Furthermore, the hinge fittings 3, 3' are attached to the shaft portions 4, 4 on both sides.
Since it is pivoted from both sides by the two side pieces 5a, 5a, it is prevented from wobbling and is always in a stable state. The pivoting work is performed smoothly around the stable hinge fittings 3, 3', and the swinging of the hinge fittings 3, 3' is suppressed even when an external force is applied to lift the lid body 1 due to water overflowing from inside. There is an effect that can be done.

[Brief explanation of the drawing]

The drawings show an embodiment of the fixing structure for a lid for an underground structure according to the present invention, and FIG. 1 is an exploded perspective view, FIGS. 2 and 3 are longitudinal sectional views of the second embodiment, and FIG. 4 is an exploded perspective view. is a cross-sectional view of the main part. 1... Lid body, 2... Concave groove, 3, 3'... Hinge fitting, 4... Shaft, 5... Holder, 5a... Side, 6... Groove wall, 7... Fastening Member, 8... retaining ring,
9... Frame body, 10... Mounting protrusion, 11... Retainer, 12... Protrusion, 13... Notch, 14... Bearing portion.

Claims (1)

[Scope of claims for utility model registration] (1) Lid main body 1, a pair of mounting ridges 10 protruding in parallel from the lower edge of the lid body 1, and each mounting ridge 10
a groove 2 with an open inner end recessed in opposing side surfaces of the holder, and a pair of shaft parts 4 protruding from both sides of the upper end.
a hinge fitting that is inserted into the groove 2 and suspended from the lid body 1 and has a retainer 11 at the lower end; a frame body 9 that supports the lid body 1; The groove 2 has a straight line shape and is inclined so that the inner end is lower than the outer end when the lid is closed. The shaft portion 4 is inserted into the groove 2, and is fitted into the groove 2 from the inside and fixed to the left and right straight sides of the presser 5, which has a substantially U-shape. A fixing structure for a lid for an underground structure, characterized in that the ends of the lids 5a and 5a are pivotally supported toward the closed outer end of the groove 2. (2) The fixing structure for a lid for an underground structure according to claim 1, wherein the hinge metal fitting has a bent upper end that fits into the central space of the substantially U-shaped holding device 5. (3) The hinge metal fitting is suspended from the central cavity of the approximately U-shaped holding device 5 to the lid body 1, and is attached to the protrusion 1 on the inner edge of the frame body 9.
a straight one 3' with a notch 13 that engages with 2;
A fixing structure for a lid for an underground structure as set forth in claim 1 of the utility model registration.