JPS6035646Y2 - Manhole raising board - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to provide a lifting board that is robust, simple, and capable of reliably raising the height.

Therefore, the present invention includes a frame-shaped main plate 1 interposed between the manhole frame a and the lid holder frame, and an auxiliary plate 1a stacked under the main plate 1. A recess 3 into which the other protrusions 2 of the main plate 1 etc. fit is formed in the auxiliary plate 1a, and a recess 3 into which at least the other protrusions 2... fit into the auxiliary plate 1a.
The main plate 1 and the auxiliary plate 1a are formed into substantially the same frame shape, and an oval reinforcing part 4 and a linear reinforcing part 5 are provided in each frame part, and the main plate 1 has a lid receiving frame. This is a manhole raising board characterized in that the width is narrower by the amount of the anti-slip C than the width.

The main plate 1 and the auxiliary plate 1a described above, as well as the other auxiliary plate 1b used together with them in the illustrated embodiment, are all made of cast metal, and each has an oval reinforcing portion 4 in the center that is biased outward. It has a frame shape with a linear reinforcement part 5 connecting the frame part and the frame part,
Bolts and the like can be inserted into the spaces 6 and 7 other than the frame.

Furthermore, although the overall shape is fan-shaped, this is because a circular manhole is targeted, and the specific shape is not limited to the fan-shape.

However, as shown in the example, the main plate 1 and the auxiliary plates 1a and lb have the same basic shape except for the width and the like.

The main plate 1 has a width that is shorter than the thickness of the manhole frame a, so as to exclude a slip stopper C that is previously suspended from the inner edge of the lid receiving frame (see Figs. 4 and 5).

Also, since the auxiliary plate 1a is used at an intermediate position, its shape is the same as the main plate 1, but it may have different vertical and horizontal dimensions as shown in Figure 1, or it may be exactly the same as the main plate 1 as shown in Figure 8. In addition to the one without the protrusion 2, the one with the protrusion 2 (Fig. 8) is also available.

The other auxiliary plate 1b is suitable for use at the lowest stage, and is provided with a stopper C at the center of its inner edge, which is engaged with a notch d on the inner surface of the manhole frame a.

Furthermore, the anti-slip C may be formed on the left and right sides of the inner edge, and in this case, the anti-slip C is formed on the inner surface of the manhole frame a as shown in Fig. 8.
will be locked.

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

Both the recess 3 and the protrusion 2 are formed into a tapered shape to facilitate fitting.

According to the present invention, several main plates 1 and 1a are provided, and they are evenly distributed and arranged at intervals on the manhole frame a, or are not provided and are arranged in parallel, thereby making the cover frame as a whole.
Alternatively, only one side can be raised, and together with the main plate 1, the auxiliary plate 1a and the other auxiliary plate 1b can also be raised in the same way.
It can be stacked in tiers or 3 tiers, in which case the upper and lower main plates 1,
The protrusions 2 of the auxiliary plates 1 and 1a are fitted into the recesses 3 and stabilized, allowing the manhole to be raised smoothly and quickly.

In particular, the device of the present invention has an auxiliary plate 1a that is shared with the main plate 1, and the auxiliary plate 1a does not have any protrusions 2, so it can be placed directly on the manhole frame a, and the main plate 1 and the auxiliary plate 1a has a substantially identical frame shape, and an oval reinforcing part 4 and a linear reinforcing part 5 are provided in each frame part, which increases the strength and saves materials.Moreover, the main plate 1 can be used as a lid holder frame. Since the width is narrower by the amount of the slip prevention C than the width, there is an effect that the lid holder frame can be used again as a lid holder frame without any processing on the lid holder frame before fitting, and if the raised height is small, the lid holder frame can be used again. The retainer of the receiving frame is locked in the same notch d as the original and exerts a positioning function, and the main plate 1, auxiliary plate 1a...
・Since they are basically the same shape, they are easy to manufacture and have remarkable effects such as compatibility, and their outer shape is not based on specific curvature or dimensions, so they can be used as they are even if the size of the manhole changes. be able to.

[Brief explanation of drawings]

The drawings show an embodiment of the manhole raising board according to the present invention, and FIG. 1 is a perspective view, FIG. 2 is a partial plan view, and FIG.
Figure 3 is a back view, Figure 4 is a cross-sectional view of two main plates stacked together, Figure 5 is a perspective view of the state interposed between the manhole frame and the cover frame, and Figure 6 is the raised state. FIG. 7 is a longitudinal side view, FIG. 8 is an exploded perspective view of a receiving frame of another type, FIG. 9 is a perspective view when raised, and FIG. 10 is a longitudinal side view. a... Manhole frame, b... Lid holder frame,
1...Main plate, 1a...Auxiliary plate, 2...
... Protrusion, 3 ... Recess, 4 ... Oval reinforcement section, 5 ... Linear reinforcement section.

Claims (1)

[Scope of utility model registration request] a frame-shaped main plate 1 interposed between the manhole frame a and the lid receiving frame;
The main plate 1 has protrusions 2 on the corners of the lower surface, and the protrusions 2 of other main plates 1 etc. on the upper surface.
The auxiliary plate 1a has a recess 3 into which at least another protrusion 2 is fitted, and the main plate 1
and the auxiliary plate 1a are formed into substantially the same frame shapes, and an oval reinforcing part 4 and a linear reinforcing part 5 are provided in each frame part,
Furthermore, the main plate 1 is formed to be narrower than the width of the lid holder frame by the amount of the stopper C.