JPH036698Y2 - - 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 may also be 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 not only steel or concrete but also other materials, and in Utility Model Application No. 61-176266, the cylindrical axis was attached to the detour surface. 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 notched into a semicircle, and the tip head of the other U-shaped structure cut out in 3/4 is assembled in such a manner as to hold the tip head of the semicircle, and rotated by a predetermined angle. Configure possible joints,
On the other hand, it has been proposed that by providing a lid that fits the upper opening of the joint, it is possible to deal with all kinds of detours in the field by preparing only a small number of units.

That is, FIGS. 3a to 3c show an embodiment in which the detour surface is horizontal, and FIGS. 4 a to 4c show an embodiment in which the detour surface is vertical.

In Figures 3a and 3b, reference numeral 9 is a U-shaped structure, at the tip of which is shaped a cylindrical box 9a with an open top facing vertical placement, 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 in the figure, the upper ends of the cylindrical boxes 9a and 10a are both provided with flanges, through which both can be fixed at a predetermined angle with bolts.

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.
2 in the horizontal plane.

In Fig. 4a, reference numeral 13 is a U-shaped structure, and its tip is shaped with a cylindrical box 13a having an open top facing horizontal placement as a 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 having a radius of , and a rotation direction different from that in FIG. 3 described above is constructed.

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. 3.

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 is attached in the same manner as shown in FIG. 3.

FIG. 2C 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.

``Problem that the invention seeks to solve'' However, in the above structure, the detour section will bulge considerably on both sides or both above and below compared to the U-shaped structure of the general culvert section.
As shown in FIGS. 5a and 5b, problems occur when the installation approaches the sidewalk edge A or the road pavement B.

``Means for solving the problem'' and ``effect'' This proposal was made in view of the above circumstances, and its gist is to provide an ellipsoidal ring with an opening on the top surface in a direction that makes the ring axis orthogonal to the detour surface. In a U-shaped structure formed by shaping a groove in a predetermined direction as a tip beak, a joint part that can be rotated by a predetermined angle by assembling two U-shaped structures in such a manner that the tip beaks are mutually supported. On the other hand, if a lid is provided that matches the top opening of the joint, by limiting the bulge to only one side of the U-shaped structure of the general culvert in the joint, the above-mentioned The point is that it is possible to eliminate the situation where the road becomes an obstacle at the edge of a sidewalk or on road pavement.

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

Figures 1 a to c are plan views, assembly parts, and explanatory views of the construction site of the proposed unit for horizontal detours; Figures 2 a to c are assembly views of the proposed unit for vertical detours, a developed view of the lid, and explanatory views of the construction site. be.

In FIG. 1, a figure 1 is a U-shaped structure, and a beak is formed at the tip of the U-shaped structure with an truncated ring-shaped groove 1a having an opening on the upper surface facing vertical placement.

The beak is bent in a predetermined direction, that is, in one direction opposite to the U-shaped structure of the general part of the culvert, which would cause problems if it were to swell.

Reference numeral 2 denotes another U-shaped structure, at the tip of which a cutout ring-shaped groove 2a with an upper opening in the same direction is formed as a beak.

The aforementioned truncated ring-shaped groove 1a is the truncated ring-shaped groove 2a.
It is assembled in such a manner that it is held in place.

That is, the small diameter of the occluded ring-shaped grooves 1a and 2a,
The large diameters r ₁ , R ₁ , r ₂ , and R ₂ have the relationship r ₁ < r ₂ , R ₁ > R ₂ , and can rotate within the angular range between the collision between the neck of the U-shaped structure and the tip of the beak. A joint part is constructed.

The rotation angle can be changed freely by increasing R ₁ and R _2. For example, when the rotation angle is 60°, R ₁ R ₂ 2W (W...Culvert width) When the rotation angle is 30°, R ₁ R ₂ 1.2 It becomes W.

As shown in the figure, flanges are formed on the upper edges of the occluded ring boxes 1a and 2a, and both can be fixed at a predetermined angular posture by bolting through the flanges.

Then, by changing the overlap part C or D, R ₁ and R ₂ , and the width W of the neck of the U-shaped structure,
Furthermore, by providing the overlapping portions C and D on opposite sides, a flexible rotation angle can be obtained, and a joint with good sealing performance can be obtained by simply sealing the ends of the overlapping portions C and D.

Although the lid for closing the top opening is not shown in the figure, after wiring a joint with an outer flange structure with an opposite hand to the joint that can be used with various omitted rings in multiple combinations, After adjustment, you can secure it with screws, etc. and hang the lid.

Figure C shows the situation at an actual construction site, and by interposing the unit 3 mentioned above, it is possible to excavate along the sidewalk edge A even in a place where the sidewalk edge A exists and there is no margin on one side, and the sidewalk edge A is The manhole 12 can be bypassed in the horizontal plane without any hindrance.

In FIG. 2, reference numeral 4 denotes a U-shaped structure, at the tip of which a beak is formed with an truncated ring-shaped groove 4a with an open upper surface facing horizontal placement.

The beak is bent in a predetermined direction, that is, in the opposite direction where it would be difficult to swell up than the U-shaped structure of the general culvert (in the illustrated embodiment, it is downward because the road pavement B becomes an obstacle).

Reference numeral 5 denotes another U-shaped structure, at the tip of which a cut-off ring-shaped groove 5a with an upper opening in the same direction is formed as a beak.

The occluded ring-shaped grooves 4a and 5a are assembled in such a manner that they are held against each other.

That is, the small diameter of the occluded ring-shaped grooves 4a, 5a,
Set the large diameter according to Figure 1.

Thus, a rotatable joint is formed in the angular range between the collision between the neck of the U-shaped structure and the tip of the beak, which has a different direction of rotation than in the case of FIG. 1 described above.

Also, as shown in the figure, flanges are formed on the upper edges of the occluded ring-shaped grooves 4a and 5a, and both can be fixed at a predetermined angle with screws through the flanges. be.

Furthermore, the same applies to overlapping parts and seals.

The lid for closing the top opening can be adapted to various top openings by combining a plurality of lid plates 6, 6' as shown in figure b, and after wiring and adjusting the rotation angle, it is fixed with screws, etc. and put the lid on.

Figure C shows the situation at the actual construction site, and by interposing the unit 7 mentioned above, even in places where there is road pavement B and there is no space above it, and where there is a limit to the depth of excavation, road pavement B does not cause any obstruction. The existing buried pipes 18, . . . are detoured in a vertical plane without causing any problems.

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.

``Effect of the invention'' As described above, according to the present invention, when burying a box culvert, a detour can be constructed without obstructing the edge of a sidewalk, road pavement, etc., even under severe constraints, and it is extremely effective in practice. suitable.

[Brief explanation of drawings]

Figures 1 a to c are plan views, assembly drawings, and explanatory views of the construction site of the proposed unit for horizontal detours; Figures 2 a to c are assembly views of the proposed unit for vertical detours, a developed view of the lid, and explanatory views of the construction site; FIGS. 3 and 4 are explanatory diagrams of the conventional system corresponding to those of FIGS. 1 and 2, and FIGS. 5a and 5b are explanatory diagrams of the obstructive situation of the conventional system. 1... U-shaped structure, 1a... Missing ring-shaped groove, 2...
U-shaped structure, 2a... Not-circular ring-shaped groove, 3... Unit, 4... U-shaped structure, 4a... Not-circular ring-shaped groove, 5
...U-shaped structure, 5a... missing circular ring groove, 6... lid,
6'...Lid, 7...Unit, 9...U-shaped structure, 9a
...Cylindrical box, 9b...Neck, 10...U-shaped structure, 10
a... 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... Sidewalk edge, B... Road pavement, C, D... Overlapping portion.

Claims (1)

[Claims for Utility Model Registration] A U-shaped structure in which an truncated ring-shaped groove with an opening on the upper surface in a direction perpendicular to the detour surface is shaped as a tip beak in a predetermined direction, The tip of the U-shaped structure is assembled in such a manner that the distal beak is mutually supported to form a joint part that can be rotated by a predetermined angle, and a lid that matches the opening on the upper surface of the joint part is provided. Box culvert bypass unit.