JPH0312822Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a receiving frame for a manhole cover of an inspection opening of an underground underground facility such as a septic tank for treating human waste.

(Prior Art) Conventionally, there are various structures for manhole frames as shown in FIG. 6, but in all of them, for example, as shown in FIG. Since the structure is such that the manhole frame A is attached to the flange 3 by abutting it against the top surface of the flange 3, the manhole frame A can only be attached to the flange 3 at the same angle as the top surface of the flange 3, and buried objects may have a water gradient, etc. on the ground surface. For example, when buried in a garage, etc., or where the ground surface is horizontal and buried object B should originally be buried horizontally, due to a construction error, buried object B was buried not horizontally but at an angle. In this case, the situation as shown in Figure 7 occurred, and the manhole part was not flush with the ground surface, but instead protruded from the ground surface or was recessed, causing major problems in terms of safety and appearance.

(Problem to be Solved by the Invention) The problem to be solved by the invention is to make it possible to vary the mounting angle of the manhole frame with respect to the upper surface of the manhole frame mounting flange portion of an underground facility.

(Means for Solving the Problems) The technical means taken by the present invention to solve the above problems is to provide a plurality of easily cuttable small protrusions on the lower surface of the base of the manhole frame.

(Function) According to the above structure of the present invention, the angle and height of the manhole frame with respect to the upper surface of the manhole frame mounting flange can be varied by cutting each of the small protrusions to a required length.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the figure, the manhole frame A is an annular base body with an inner circumferential wall 4 and an outer circumferential wall 5 erected on the upper surface, and a mounting wall 6 and small adjustment protrusions 2 vertically disposed on the lower surface.

The inner circumferential wall 4 is formed in an annular shape along the inner circumferential edge of the base body 1, and the outer circumferential wall 5 is located outside the inner circumferential wall 4 at an appropriate distance from the inner circumferential wall 4, is concentric with the inner circumferential wall 4, and is longer than the inner circumferential wall 4. Form into a high annular shape.

Thus, on the upper surface of the base body 1, there is an annular manhole cover engaging portion 7 sandwiched between the inner and outer circumferential walls 4 and 5.
is formed.

On the other hand, the mounting wall 6 is formed in an annular shape concentric with both the inner and outer circumferential walls 4 and 5 at the middle part in the width direction of the lower surface of the base body 1 and hangs downward, and the small adjustment protrusion 2 is attached to the inner side of the mounting wall 6. A plurality of them are provided on concentric circles with appropriate intervals.

Each of the adjustment small protrusions 2 is formed in the shape of a small piece whose length in the vertical direction is slightly shorter than that of the mounting wall 6, and is formed so that it can be easily cut at any position in the vertical direction.

As shown in FIG. 3, such a manhole A is attached and fixed to an underground object B, for example, a manhole portion 7 of a septic tank, by fitting a mounting wall 6 onto the manhole portion 7.

At this time, the adjustment small protrusion 2 comes into contact with the top surface of the manhole frame mounting flange 3 provided at the opening edge of the manhole portion 7 of the buried object B, but if the ground surface on which the buried object B is buried is not horizontal but has a slope. Well, just in case
If the buried object B is buried not horizontally due to a construction error, etc., cut the adjustment small protrusion 2 at the required position and adjust it so that the ground surface and the manhole surface are on the same level, or The inclination of the manhole frame mounting flange 3 of the buried object B is adjusted so that the upper surface of the base 1 of the manhole frame A becomes horizontal.

In addition, when the ground surface on which buried object B is buried is horizontal and buried object B is also buried horizontally, there is no need to cut the adjustment small protrusions 2, but it is necessary to cut all the small protrusions 2 to the same length. You can also cut it into

In addition, if underground object B is mass-produced in a factory and is shipped with manhole frame A attached to underground object B, make sure that manhole frame A does not separate from underground object B and be lost during transportation. , manhole frame A
It is desirable to securely fix the buried object B to the manhole frame attachment part using fixing members 8 such as bolts, pine, or plastic rivets that can be relatively easily removed at the construction site before shipping. As shown in FIGS. 4 and 5, a notch or hole is formed in the flange 3 into which the small adjustment protrusion 2 fits so that the lower surface of the base 1 of the frame A is in close contact with the upper surface of the manhole frame mounting flange 3 of the underground underground facility. The number of small protrusion engaging parts 9 equal to the number of small protrusions 2 is provided, and the small protrusions 2 are fitted into and engaged with the small protrusion engaging parts 9 at the time of shipment.

In this way, when the small protrusion engaging part 9 is provided on the manhole frame mounting flange 3, when the small protrusion 2 does not need to be cut and adjusted, the small protrusion 2 can be fitted into the small protrusion engaging part 9 and engaged. Then, the manhole frame A can be attached to the buried object B, and when adjustment is required, the small protrusion 2 can be placed on the part of the manhole frame attachment flange 3 other than the small protrusion engaging part 9.

10 in the figure is a manhole cover, and an engaging piece 11 protruding downward along the periphery is engaged with the manhole cover engaging portion 7 on the upper surface of the manhole frame A, and is placed over the upper surface of the base 1, and the opening of the base 1 is closed. block.

(Effects) Since the present invention has the above configuration, it has the following advantages.

Multiple small adjustment protrusions that can be easily cut are provided on the bottom surface of the base of the manhole frame, so even if the ground surface where the buried object is buried is sloped or the ground surface is horizontal, there is no possibility of construction errors. Even when the manhole is buried at an inclination due to such reasons, by cutting the above-mentioned small protrusions to the required length, it is possible to match the opening surface of the buried manhole with the slope of the ground surface and make both sides of the manhole on the same surface. It is also possible to adjust the inclination of the manhole frame attachment part to ensure a horizontal manhole opening surface.

In addition, it can normally be used in the same way as a conventional manhole frame.

Therefore, this manhole frame is particularly effective when there are a plurality of manholes in one underground facility.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a manhole frame showing an embodiment of the present invention, Fig. 2 is a bottom view, Fig. 3 is a sectional view showing the state of use, and Fig. 4 is a sectional view of the manhole frame of the invention at the time of shipment and underground. FIG. 5 is a sectional view showing the relationship between buried objects; FIG. It is. 1... Manhole frame base, 2... Small protrusions for adjustment.

Claims (1)

[Scope of utility model registration request] A manhole frame with a plurality of small adjustment protrusions that can be easily cut on the bottom surface of the manhole frame base.