JPS6035647Y2 - Manhole raising board - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a manhole raising board.

The purpose of the present invention is to provide a sturdy, simple, and reliable lifting board.

Therefore, the present invention provides a frame-shaped main plate 1 interposed between a manhole frame a and a lid receiving frame having a stopper C that engages with a notch d on the inner surface of the manhole frame. one anti-slip leg piece 2 that locks into the recess of the manhole frame a;
Or 2, which is secured to the inner surface of the manhole frame a at two or more places.
Attach one or more anti-slip leg pieces 2, 2... to the inner edge 3 of the main plate.
Or, it is a manhole raising plate formed by forming two or more.

The main plate 1 shown in the figure and the auxiliary plate 1' which is stacked and used together with it as necessary are all made of cast metal and each has an oval reinforcing part 4 and a straight reinforcing part 5 in the center, and the overall shape is as follows. Although it is fan-shaped, this is because it is intended for circular manholes.
The specific shape is not limited to a fan shape.

The main plate 1 has a width shorter than the thickness of the manhole frame a, and the anti-slip leg piece 2 is provided at approximately the same position as the anti-slip C that is suspended in advance from the inner edge of the receiving frame (see Figs. 2 to 4). (see figure).

The auxiliary plate 1' has the same shape as the main plate 1, but its width is made narrower than that of the main plate 1 in order to eliminate the retainer C for the receiving frame.

The main plate 1 has an anti-slip leg piece 2 at the center of the inner edge 3, which is engaged with a notch d previously provided on the inner surface of the manhole frame a.

The recess d is for locking the stopper C of the receiving frame, but the stopper leg piece 2 of the present invention can also be used for locking a raised board.

Furthermore, the main plate 1 may have a pair of anti-slip legs 2.2 on the left and right sides of the inner edge 3. In this case, the anti-slip legs 2.2 are locked to the inner surface of the manhole frame a as shown in FIG. , it may be fixed by means such as bolting, which will be described later.

In the figure, e is the aforementioned stud bolt that fastens the main plate 1 and the auxiliary plate 1', and f is a nut.

The recess 6 determines the stacking position of the auxiliary plate 1' and is fitted with a protrusion 7 protruding at a position corresponding to the corner of the auxiliary plate 1'.
figure).

Both the recess 6 and the protrusion 7 are formed into a tapered shape to facilitate fitting.

According to the above configuration, several main plates 1 are prepared, and the respective anti-slip leg pieces 2 are engaged with the existing recess d1 on the inner surface of the manhole frame or the inner surface of the manhole frame a, and are arranged on the manhole frame a. It is easy to raise the height by accurately positioning and interposing each main plate 1 between the manhole frame a and the lid receiving frame.

Then, the protrusion 7 of the auxiliary plate fits into the recess 6 of the main plate 1 or another auxiliary plate 1' and becomes stable.

Therefore, according to the present invention, when locking the main plate 1 to the manhole frame a, one anti-slip leg piece 2 is locked there using the existing recess d, or two or more leg pieces are used to lock the main plate 1 to the manhole frame a. 2,
2... are locked to the inner surface of the manhole frame a, so that the manhole can be accurately raised smoothly and quickly without any new processing or improvement.

[Brief explanation of drawings]

The drawings show an embodiment of the manhole raising board according to the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a perspective view showing a state in which it is interposed between a manhole frame and a cover receiving frame, and Fig. 3 is a perspective view. Figure 4 is a perspective view showing the raised state, Figure 4 is a vertical side view, Figure 5 is
The drawings are an exploded perspective view of another type of receiving frame, FIG. 6 is a perspective view when raised, and FIG. 7 is a vertical sectional side view. a... Manhole frame, b... Lid holder frame,
C... Anti-slip, d... Notch, 1...
...Main plate, 1'...Auxiliary board, 2...
- Anti-slip leg pieces.

Claims (1)

[Scope of utility model registration request] A frame-shaped main plate 1 interposed between a manhole frame a and a lid receiving frame having a slip stopper C that locks into a recess d on the inner surface of the manhole frame, the main plate 1 being inserted into the recess of the manhole frame a. One anti-slip leg piece 2 that locks intermittently, or two or more anti-slip leg pieces 2 that lock on the inner surface of the manhole frame a at two or more places, are attached to the inner edge 3 of the main plate. A manhole raising board consisting of two or more.