JPS585711Y2 - Lid locking structure of manhole iron lid - Google Patents

Description

[Detailed description of the invention] The present invention relates to a manhole iron cover, and in particular, the object of the present invention is to provide a manhole iron cover whose lid body can be opened and closed smoothly and easily, and whose lid body can be easily removed. It was proposed.

Another object of the present invention is to provide a lid locking structure for a manhole iron lid that does not generate noise due to rattling of the lid body.

In order to satisfy the above object, the present invention is constructed as follows.

That is, the present invention has a pair of bearing pieces 2.2' on the rear edge of the lid body 1.
The frame 3 into which the lid main body 1 is fitted is integrally provided with a fitting part 6 into which the intermediary concave member 5, which is pivotally connected to the bearing pieces 2, 2' by a pin 4, is fitted. An insertion hole 9 for a J-shaped locking fitting 8, which is pivotally supported by a pin 7 on the intermediary concave member 5, is opened in the fitting part 6, and when the opened lid body 1 is pushed forward, the J-shaped locking fitting 8 is inserted. A lid locking structure for a manhole iron lid in which an inclined upper edge 11 is formed on the front wall of the insertion hole 9 to help the inclined protrusion 8' provided at the lower end of the hole to be tilted forward and removed from the insertion hole 9. It is.

In the illustrated embodiment, the lid body 1 is formed into a square shape, but it goes without saying that the lid body may have a round or triangular shape (a set of two pieces), and accordingly, the shape of the frame 3 may be changed. The shape also changes.

Further, reference numeral 10 in the figure indicates a fitting edge protruding from the lower surface of the lid body 1.

11 is an inclined upper edge of the insertion hole 9.

Since the present invention has the above-described structure, the lid main body 1 which is closed in the state shown in FIG. As shown by the solid line in the figure, it can also be fully opened when aligned with the frame 3 using the pin 7 as a fulcrum.

At this time, since the intermediate concave member 5 is rotated by the pins 4 and 7, the opening and closing operations of the lid body 1 are performed smoothly.

Further, the lid body 1 can be removed very easily from the opening position shown in FIG.

That is, from the opening position shown in FIG. 3, the lid main body is held in a horizontal state and is once pushed inward of the frame 3.

Then, the J-shaped locking metal fitting 8 falls toward the inclined upper edge 11, and the J-shaped locking metal fitting 8 slides as shown in FIG. Lid body 1 is frame 3
Since it can be removed more easily, the removal work is very easy, and the installation is also easy, which improves its practical value as a manhole iron cover.

In particular, in the case of the present invention, the lid body 1 and the frame are connected to each other by the pin 4 and the intermediary concave member 5, unlike conventional ones in which the lid body and the frame are integrated by a hinge, so that the lid body 1 is connected to the frame 3. It is easy to fit in, and therefore noise generation due to rattling can be prevented, and since the movable part is divided into two parts, the pin 4 and the intermediary concave member 5, the opening and closing of the lid body 1 can be performed very smoothly and easily. The lid main body 1 can also be removed from the frame 3, and can be easily removed by pushing the lid main body 1 in the direction of the sloping upper edge 11 provided on the frame 3, but if it is only lifted, the slanted protrusion 8
' is caught on the lower end of the front wall of the insertion hole 9 and is difficult to dislodge, making it easy for workers to handle and difficult to steal or tamper with.

[Brief explanation of drawings]

The drawings show an embodiment of the lid locking structure for the manhole iron lid according to the present invention, in which Figure 1 is a vertical side view, Figure 2 is a plan view,
FIG. 3 is a longitudinal sectional side view showing the opening/closing and removal operations of the lid, and FIG. 4 is an exploded perspective view of the main parts. 1... Lid body, 2, 2'... Bearing piece,
3...Frame, 4...Pin, 5...
・Intermediate concave member, 6... Fitting part, 7...
・Bin, 8...J-shaped locking bracket, 8'...
・Slanted protrusion, 9...insertion hole, 11...
Sloped upper edge.

Claims (1)

[Scope of utility model registration request] A pair of bearing pieces 2, 2' are integrally provided on the rear edge of the lid body 1, and a frame 3 into which the lid body 1 is fitted has an intermediary concave shape pivotally connected to the bearing pieces 2, 2' by a pin 4. Fitting portion 6 into which member 5 fits
In addition, an insertion hole 9 for a J-shaped locking fitting 8, which is pivotally supported by a pin 7 on the intermediate concave member 5, is provided in the fitting part 6, so that when the opened lid main body 1 is pushed forward, A human hole in which an inclined upper edge 11 is formed on the front wall of the insertion hole 9 to help the J-shaped locking fitting 8 to be tilted forward and the inclined protrusion 8' provided at the lower end thereof to be pulled out from the insertion hole 9. Iron lid locking structure.