JPH0542121Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an inclination adjustment method for underground structures that makes it possible to install a cover that closes an opening such as a manhole to match the inclination of the road surface. Regarding blocks.

[Conventional technology]

At the road surface opening of a shaft that connects underground objects such as water supply and sewage systems, underground structural facilities, buried conduits, and their auxiliary equipment, etc. Various types of lids such as lids and water meter lids are provided.

When installing such a lid, it is necessary to align the top surface of the lid with the road surface so that it is flush with the road surface without creating a step. However, the road surface on which the lid is installed, such as a road, is not always level. Therefore, a tilt adjustment ring or the like is used to tilt the lid according to the slope of the road surface.

Furthermore, in the case of JP-A No. 59-192134, in order to facilitate the installation work at this time, a stacking member consisting of a pair of lower and upper rings with sloped mating surfaces is used. It is shown.
That is, by relatively rotating the lower ring and the upper ring, the contact position of the contact surfaces is shifted, and the inclination angle of the lid body is adjusted with respect to the inclination angle of the road surface. For example, when using an upper ring and a lower ring with an inclination angle of 5 degrees, it is said that the inclination angle of the upper surface of the upper ring can be changed within a range of 0 to 10 degrees.

[Problem that the invention attempts to solve]

However, in order to obtain the necessary angle of inclination using the method disclosed in this publication, it is necessary to rotate both the upper ring and the lower ring.

FIG. 4 is a diagram illustrating such problems with the conventional technology. Figure a shows the case where the highest side of the lower ring a is aligned with the lowest side of the upper ring b. At this time, the upper surface of the upper ring b is maintained horizontally. Figure b shows the case where the highest side of the lower ring a is aligned with the highest side of the upper ring b. At this time, the upper surface of the upper ring b is inclined with the maximum angle of inclination. Further, the direction of inclination is from left to right in the drawing. Figure c shows a state in which the upper ring b is rotated 90 degrees from the figure a with respect to the lower ring a. At this time,
The inclination angle of the upper ring b has a value smaller than the maximum inclination angle shown in FIG. 4b. However, the direction of inclination is a direction that intersects the line connecting the highest side to the lowest side of the lower ring a (in the direction parallel to the plane of the paper in FIG. 4c), as shown by the arrow.

In this manner, the angle and direction of inclination of the upper surface of upper ring b changes depending on the relationship between the lower ring a and upper ring b. For example, in the case of FIG. 4b, the direction of inclination of the lower ring a may be made to match the direction of inclination of the road surface. However, the inclination angle of the upper ring b at this time is uniquely determined, and the lower ring a and the upper ring b are rarely used with this positional relationship in contact with each other.

That is, in order to cope with inclination angles that vary depending on road surface conditions, the inclination direction of the upper ring b is often used in a state where it is crossed with the inclination direction of the lower ring a. However, in this state of use, as shown in FIG. 4c, the direction of inclination of the lower ring a and the direction of inclination of the upper surface of the upper ring b are different. Therefore, by rotating both the lower ring a and the upper ring b, it is necessary to make the direction of inclination of the upper surface of the upper ring b coincide with the direction of inclination of the road surface. That is, even if only the upper ring b is rotated, the inclination direction of the upper surface of the upper ring b cannot be made to match the inclination direction of the road surface. Therefore, the number of man-hours required during on-site construction increases and becomes troublesome.

Therefore, by adopting a spherical joint structure, the present invention increases the degree of freedom in adjusting the inclination angle and direction of the lid body, and makes it easy to adjust the tilted state of the lid body no matter how sloping the road surface is. The object of the present invention is to provide an inclination adjustment block that can match the

[Means for solving problems]

In order to achieve the purpose of the inclination adjustment block for underground structures of the present invention, the upper surface of the lower block is formed into a spherical convex surface, and the back surface of the receiving frame or upper block placed on the lower block is formed into the spherical shape. It is characterized by being formed into a spherical concave surface that comes into contact with a convex surface.

[Effect]

That is, in the present invention, the receiving frame or the upper block is placed on the lower block with the spherical concave surface formed on the back surface thereof abutting the spherical convex surface formed on the upper surface of the lower block. By forming the connecting portions into concave and convex spherical surfaces that abut each other in this way, the angle and direction of inclination of the upper surface of the lid that is fitted and supported by the receiving frame can be freely adjusted. Therefore, it becomes easy to install the lid body on site depending on the road surface condition.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.

FIG. 1 is a half sectional view showing the fitting structure between the upper block and the lower block in this embodiment.

A leg portion 2 extending downward is provided at the peripheral edge of the upper block 1. A spherical concave surface 3 having its apex at the center of the upper block 1 is formed from the leg portion 2 to the entire back surface of the upper block 1. In this example, a separately prepared receiving frame is fixed by an upper connecting bolt 8a, which will be described later, protruding from a bolt insertion hole 7 provided in the upper block 1. However, the present invention is not limited to this, but can also be an integral receiving frame shape in which a spherical concave surface is directly formed on the back surface of the receiving frame.

The lower block 4 supporting the upper block 1 is
It has an upper surface 5 formed of a part of a spherical convex surface corresponding to the spherical concave surface 3. Therefore, when the upper block 1 is placed on the lower block 4, the upper surface 5 comes into contact with the spherical concave surface 3, so that the upper block 1 is supported by the lower block 4. That is,
A kind of spherical joint is formed between the lower block 4 and the upper block 1. Therefore, it is possible to freely change the angle and direction of inclination of the upper block 1 without moving the lower block 4.

FIG. 2 explains an example. In the case of figure a, the upper block 1 is arranged horizontally with respect to the lower block 4, and each connecting bolt (not shown) of the fixing jig is inserted into the bolt insertion hole 6, 7 provided in each. Then, the lower block 4, the upper block 1, and the receiving frame placed on the upper block 1 are fixed. A plurality of bolt insertion holes 6 and 7 are provided at equal intervals on the periphery of the lower block 4 and the upper block 1.

Further, when changing the inclination angle and direction of the upper surface of the upper block 1 in accordance with the inclination of the road surface, only the upper block 1 is inclined as shown in FIG. 2b. Even when the upper block 1 is tilted in this way, the distance between the upper block 1 and the lower block 4 is as follows.
Since the spherical concave surface 3 and the spherical convex surface of the upper surface 5 are connected by abutting against each other, the weight of the upper block 1 is sufficiently supported by the lower block 4. Also, the upper block 1
The angle and direction of inclination are not subject to any restrictions. Therefore, the work of tilting the upper block 1 according to the road surface condition at the installation site can be easily performed without the need to move two or more types of members as explained in FIG. 4.

FIG. 3 shows an example of a fixing jig used to connect the upper block 1 and the lower block 4.

This fixing jig 8 consists of an upper connecting bolt 8a, a substrate 8b, and a lower connecting bolt 8c. Here, the upper connecting bolt 8a is slidably and tiltably attached between ribs 8e erected on the upper surface of the board 8b via a pin 8d inserted into an insertion hole drilled near the lower end of the upper connecting bolt 8a. ing. On the other hand, the lower connecting bolt 8c is inserted into an insertion hole bored at an eccentric position of the board 8b, and rotatably connects the board 8b.

Then, tighten the lower connecting bolt 8c to the lower block 4.
The bolt is inserted into the bolt insertion hole 6, and the nut is screwed in from below. Similarly, the upper connecting bolt 8a is inserted into the bolt insertion hole 7 of the upper block 1 and the anchor hole of the receiving frame placed thereon, and then a nut is screwed from above. Here, since the upper connecting bolt 8a is attached to the base plate 8b so as to be slidable and tiltable, the second
As shown in Figure b, the upper block 1 is installed on the lower block 4 by tilting it, and the bolt insertion holes 6, 7 are installed.
Even if mismatch occurs in the axial direction, both blocks 1 and 4 and the receiving frame can be firmly connected in that state.

In the above example, a fixing jig 8 is used to fix the upper block 1 and the lower block 4. However, the present invention is not limited to this, and can also be applied to a case where both blocks 1 and 4 are fixed by filling cement mortar or the like from the inner peripheral side.

[Effect of idea]

As described above, in the present invention, the receiving frame or the upper block is fixed onto the lower block by bringing the spherical convex surface and the spherical concave surface into contact with each other. Therefore, the inclination angle and direction of the lid that is fitted and supported by the receiving frame can be freely adjusted, making it easy to match the top surface of the lid to the slope of the road surface, which varies depending on the installation site. become. Since the lid supported in this manner does not protrude above the road surface, it does not become an obstacle to pedestrians and the like.

[Brief explanation of the drawing]

Figure 1 shows the relationship between the upper block and lower block in the embodiment of the present invention, Figure 2 is a diagram for explaining the fitted state of the upper block, and Figure 3 is a diagram for explaining the fitted state of the upper block.
The figure shows a fixing jig used to fix the upper block to the lower block. On the other hand, FIG. 4 is a diagram for explaining the problems of the conventional technique in which the inclination angle of the lid body is adjusted using a lower ring and an upper ring. 1... Upper block, 2... Leg, 3... Spherical concave surface, 4... Lower block, 5... Upper surface, 6, 7
...Bolt insertion hole, 8...Fixing jig, 8a...
Upper connecting bolt, 8b...board, 8c...lower connecting bolt, 8d...pin, 8e...rib.

Claims (1)

[Scope of utility model registration request] For underground structures, the upper surface of the lower block is formed into a spherical convex surface, and the receiving frame placed on the lower block or the back surface of the upper block is formed into a spherical concave surface that comes into contact with the spherical convex surface. Tilt adjustment block.