JPH036699Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" This invention relates to a detour unit of a box culvert as a common trench used for burying electrical cables underground.

``Conventional technology'' A structure in which a conventional concrete U-shaped structure was buried underground as a common ditch for burying electric wires, and after wiring electric wires, etc., it was covered with a lid and paved the road. In place of a concrete box culvert, which has the advantage of having a shallow excavation depth of 1 to 1.5 m and the ability to easily bury electric cables underground, the present applicant also proposed Japanese Patent Application No. 1983-79425. et al. proposed a steel box culvert, which they claim can significantly reduce weight and thickness compared to the concrete box culvert mentioned above.

Thus, common gutters are currently provided which consist of a U-shaped structure made of steel and a lid unit. For the same purpose, box culverts made of lightweight concrete or fiber-containing concrete are also considered.

For actual construction using this culvert,
It is not always necessary to extend in a straight line, but there may be cases where it is necessary to take a detour due to the presence of various existing underground structures or design changes, but the units in such detour sections are molded into the detour shape. However, if we use plastic parts, it is necessary to mold separate units for each degree of detour, which is cumbersome in terms of manufacturing, storage, and management, and it is not possible to quickly respond to design changes on site, which creates constraints on construction. receive.

Therefore, the present applicant proposed a detour unit in a box culvert that could be made of steel, concrete, or other materials without any problems, and proposed a method for constructing a cylindrical axis with respect to the detour surface in Utility Application No. 176266/81. In the case of a U-shaped structure formed by shaping a cylindrical box with an opening on the upper surface orthogonal to each other as the tip head, there is a mode in which the tip heads of the two U-shaped structures are cut out at a required angle and held together, for example. The tip head of one U-shaped structure is cut out into a semicircle, and the tip head of the other U-shaped structure cut out in 3/4 is assembled to hold the tip head of the semicircle and rotated at a predetermined angle. We proposed a system that would be able to deal with any detours at the site by simply preparing a small number of units by configuring a possible joint and providing a lid that matches the top opening of the joint. are doing.

That is, FIGS. 2(a) to 2(c) show an embodiment in which the detour surface is horizontal, and FIGS. 3(a) to 3(c) show an embodiment in which the detour surface is vertical.

In Figs. 2a and 2b, reference numeral 9 is a U-shaped structure, the tip of which is shaped with a cylindrical box 9a with an open top facing vertical placement as a head, and the cylindrical box 9a is It is cut into a semicircle.

Reference numeral 10 denotes another U-shaped structure, at the tip of which a cylindrical box 10a with an upper opening in the same direction is shaped as a head, and the cylindrical box 10a is notched in 3/4.

The cylindrical box 9a is assembled to be held in the cylindrical box 10a.

That is, the radius R1, R of the cylindrical boxes 9a, 10a
2 means R2>R1, and the U-shaped structure 9 has its neck 9
b is assembled in such a manner that it protrudes from the notch of the cylindrical box 10a, and forms a joint that is rotatable within the angular range between the collisions between the neck 9b and the notch edges of the cylindrical box 10a.

As shown, flanges are formed on the upper edges of the cylindrical boxes 9a and 10a, and both can be fixed at a predetermined angular position by bolting through the flanges.

Then, the overlapping part A or B part, R1 and R2
By changing the width W of the neck of the U-shaped structure and by providing the overlapping parts A and B on opposite sides, a flexible rotation angle can be obtained, and the ends of the overlapping parts A and B can be sealed. This alone creates a joint with good sealing properties.

Although the lid for closing the top opening is not shown in the drawings, it has a substantially concentric circular outer flange structure with an opposite hand to the cylindrical box 10a, and is fixed with screws or the like.

Figure C shows the situation at the actual construction site, and by interposing the unit 11 mentioned above, the manhole 1
2 in the horizontal plane.

In Fig. 3a, reference numeral 13 denotes a U-shaped structure, the tip of which has a cylindrical box 13a with an open top facing horizontal placement as the head, and the cylindrical box 13a is semicircular. It has a notch in it.

Reference numeral 14 denotes another U-shaped structure, at the tip of which a cylindrical box 14a with an upper opening in the same direction is shaped as a head, and the cylindrical box 14a is cut out in 3/4.

The cylindrical box 13a is assembled to be held in the cylindrical box 14a.

That is, the radius of the cylindrical box 13a<the cylindrical box 14a
A rotatable joint portion is constructed with a radius of , and a direction of rotation different from that in FIG. 2 described above.

Further, as shown in the figure, the upper edges of the cylindrical boxes 13a and 14a are both provided with flanges, and the two can be fixed at a predetermined angular posture by bolting through the flanges. .

Furthermore, the same applies to overlapping parts and seals. However, the lid for closing the top opening cannot be processed in the same manner as in FIG. 2.

In other words, since the opening area changes depending on the rotation angle,
As shown in Figure b, it is assumed that a lid 15 that can cover most of the maximum opening and a lid 16 that can cover a portion of the maximum opening are used in a wrap combination to accommodate changes in the opening area.

The lid attachment is also the same as in FIG.

FIG. 3C shows the situation at an actual construction site, where the existing buried pipes 18, . . . are detoured in a vertical plane by interposing the unit 17.

``Problems to be solved by the invention'' However, in the configuration described above, it is possible to deal with only horizontal detours or vertical detours; It is not possible to deal with cases where the existing underground pipes 18 coexist in close proximity and must be detoured diagonally, but this can be dealt with by connecting both horizontal and vertical detour units. If you try,
Due to the presence of the general culvert section, detours cannot be made within a limited space or excavation of the detour section becomes complicated.

On the other hand, if we use a spherical rotating joint that is basically a combination of hemispheres that are made by dividing a sphere into two, the joint can be moved vertically and horizontally at the same time, and it can also be moved diagonally. ,
It is considered suitable.

In other words, as shown in Fig. 4, the structure of the spherical rotary joint is that there is no lid part as a divided body, but the lid part is an integral part, and the hemispherical structure B on the right side and the hemispherical structure B on the left side are joined to the general U-shaped structure. It has a hyperhemispherical structure A, and the radius of the sphere is in the relationship Ra>Rb. The maximum rotation angle (vertical, horizontal, diagonal) is W = H (H: height of the neck of the U-shaped structure). For 60°, RaRb = W (=H) For 30°, RaRb = 0.6W. It has the characteristics that it can be changed freely by changing the radius of the sphere, and that the angle can be adjusted freely along the way.

However, this type is difficult to manufacture due to its unique shape, there are problems with how to achieve fitting, and it also has the disadvantage of protruding horizontally and vertically, and furthermore, because it is a canopy. Since it does not have an opening on the top surface, it is not possible to drop and accommodate the wiring prepared on the ground, and it is not practical because it requires the troublesome work of passing through it.

``Means for solving problems'' and ``effects'' This proposal was made in view of the above circumstances, and its gist is that the upper surface of the cylinder axis is perpendicular to the horizontal and vertical detour surfaces. In the case of two U-shaped structures formed by shaping a cylindrical box with an opening as the tip head, each tip head is cut out at a required angle, and between the tip heads, there is a vertical line and a top opening cut out at a required angle. The horizontal cylindrical boxes are joined together through the neck of the U-shaped groove, and the connecting bodies are assembled in such a manner that they are mutually supported to form a joint part that can be rotated by a predetermined angle in the horizontal and vertical directions, and on the other hand, the joint part By providing a lid that matches the opening on the top of the roof, detours in all directions can be made from one point, allowing quick response on-site, shortening the process, and improving ease of construction.

"Example" This will be explained in detail below based on the drawings.

Figures 1a and 1b show the groove and lid of the product, and 1 in the figure is a single U-shaped structure, at the tip of which a cylindrical box 1a with an open top facing vertical placement is shaped as a head. In the illustrated example, the cylindrical box 1a is cut into a semicircle.

Reference numeral 2 denotes another U-shaped structure, at the tip of which a cylindrical box 2a with an open top facing horizontal placement is shaped as a head, and in the illustrated example, the cylindrical box 2a is cut out to 3/4. .

Reference numeral 3 denotes a connection body formed by connecting vertical and horizontal cylindrical boxes 3b and 3c with upper surface openings cut out at a required angle through a neck 3a of a U-shaped groove. There is a notch in /4, and in the case of cylindrical box 3c, there is a notch in semicircle.

The cylindrical box 3b is fitted to the cylindrical box 1a, and the cylindrical box 3c is fitted to the cylindrical box 2a, and they are assembled in such a way that they are mutually supported, and here the U-shaped structures 1 and 2 are connected to the connecting body 3.
It has a part that can be rotated horizontally and vertically.

Therefore, by combining the rotations in the horizontal and vertical directions in the connecting body 3, not only diagonal detours but also arbitrary detours are possible.

As shown, a flange is formed on the upper edge of each cylindrical box, and both can be fixed at a predetermined angular posture by bolting via the flange.

By changing the overlapping part, the radius of the cylindrical box, and the width of the neck of the U-shaped structure, and by providing the overlapping part oppositely, a flexible rotation angle can be obtained, and the ends of the overlapping part can be sealed. This alone creates a joint with good sealing properties.

Regarding the lid for closing the top opening, since the opening area of the cylindrical box 2a changes depending on the rotation angle, it is inconvenient to use a lid with a fixed size. It is best to use wrap-type lids 4, 5, and 6 that do not cause any damage.

It should be noted that the above-mentioned joint has the advantage that structural materials such as steel, casting, and Rc can be used as the material.

With the detour unit configured as described above, it is possible to freely detour at one point, and the inconveniences described above do not occur.

``Effect of the invention'' As described above, the present invention allows detours in any direction, just like a universal joint, and is extremely suitable for construction.

[Brief explanation of the drawing]

Figures 1a and b are perspective views of the groove and lid of the proposed product;
FIGS. 2a to 3c and 3a to 3c are explanatory diagrams of conventional products, and FIGS. 4a and 4b are explanatory diagrams of trial products. DESCRIPTION OF SYMBOLS 1... U-shaped structure, 1a... Cylindrical box, 2... U-shaped structure, 2a... Cylindrical box, 3... Connection body, 3a... Neck, 3
b...Cylindrical box, 3c...Cylindrical box, 4...Lap type lid, 5
... Wrap-type lid, 6... Wrap-type lid, 9... U-shaped structure, 9a... Cylindrical box, 9b... Neck, 10... U-shaped structure, 10a... Cylindrical box, 11... Unit, 12... Manhole, 13... U-shaped structure, 13a... cylindrical box,
14... U-shaped structure, 14a... Cylindrical box, 15... Lid,
16...Lid, 17...Unit, 18...Existing buried pipe,
A...overlapping part, B...overlapping part.

Claims (1)

[Claims for Utility Model Registration] Two U-shaped structures each having a cylindrical box shaped as a tip head with an opening at the top in a direction in which the cylinder axis is perpendicular to the horizontal and vertical detour surfaces. The tip heads are notched at a required angle, and a connecting body in which vertical and horizontal cylindrical boxes with top openings cut out at a required angle are connected via the neck of a U-shaped groove is held between the tip heads. 1. A detour unit for a box culvert, characterized in that it is assembled to form a joint part that can be rotated by a predetermined angle in the horizontal and vertical directions, and is provided with a lid that matches the opening on the top surface of the joint part.