JP2002054765A - Structure of pipe buried in ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a pipe buried in the ground enabling easy and quick work and arrangement in the right and left directions even if the same protection member is used. SOLUTION: This structure of the pipe buried in the ground is so constituted that a locking part 10 for locking and holding two divided cases 2A, 2A and a locked part 11 are provided in both cases 2A, 2A, protruding parts 5A entering recessed parts 1B of the pipe buried in the ground 1 by covering the pipe buried in the ground 1 with two cases 2A, 2A are provided in the cases 2A, 2A, and a means 3 for integrating a plurality of protection members 2 provided in the right and left directions or the vertical direction or right, left, and vertical directions is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an underground pipe in which convex portions and concave portions are alternately positioned in the pipe axis direction and are formed in an annular or spiral shape. The present invention relates to an underground pipe structure in which a sectional shape of a synthetic resin case is sequentially covered with a substantially rectangular protective member.

[0002]

2. Description of the Related Art In recent years, a large number of communication cables have been laid underground in addition to a large number of power cables. It is necessary to bury a large number of buried pipes. In addition, each of the disposed underground pipes is covered with a protective member divided into two parts at the top and bottom, and the protection members adjacent in the left, right, up and down directions are integrated to increase the strength of the protection member. Needless to say, there is no gap between the adjacent protective members such that earth and sand can enter. After the earth and sand are backfilled, the earth and sand enters the gap and a part of the road collapses. Such troubles do not occur. Therefore, as a conventional underground pipe structure, there is one disclosed in Japanese Patent Application Laid-Open No. 9-105479. This is because a lower block having a plurality of parallel grooves on the upper surface and an upper block having a plurality of parallel grooves on the lower surface cover the underground pipe, and a plurality (four) of which are vertically formed in each block. A long bolt is inserted through the bolt hole, and then tightened with a nut to integrate the upper and lower blocks.

[0003]

According to the above construction, when a large number of blocks are stacked in the vertical direction to cover the underground pipe, the blocks are stacked while aligning the bolt holes of each block. In addition to this, the greater the number of blocks to be stacked, the more carefully and accurately the positioning must be performed, and the operation is very troublesome and troublesome. Even if the alignment was done carefully and accurately,
When the bolt is inserted into the bolt hole, the bolt may be displaced and cannot be smoothly carried out, which is disadvantageous in terms of handling. Further, since the blocks can be integrated only in the vertical direction, in order to stack a large number of blocks in the vertical direction, not only the above-mentioned inconvenience is remarkable but also a deep groove must be dug. Therefore, when hard rock is buried in the relatively high part even in the ground, it is not possible to dig deep grooves, so the block must be equipped with many parallel grooves on the left and right,
In addition to the increase in cost, the block having a large number of parallel grooves has a significant increase in weight and lateral width, which is disadvantageous in terms of handling.

In view of the above situation, the present invention is intended to solve the problem easily and quickly, and can be arranged in the left-right direction while using the same protective member. It is to provide an underground pipe structure.

[0005]

According to the underground pipe structure of the present invention, in order to solve the above-mentioned problem, convex portions and concave portions are alternately arranged in the tube axis direction, and they are annular or spiral. The underground pipe structure is configured such that one or more of the underground pipes formed in the shape of a cross section is made of a synthetic resin case that is divided into two sections and the cross-sectional shape is sequentially covered by a substantially rectangular protective member. The two cases are provided with a locking portion and a locked portion for locking and holding the two cases, and the two cases cover the underground pipe so that the inside of the concave portion of the underground pipe is covered. The case is provided with a protruding portion that enters the case, and a means is provided for integrating a plurality of the protection members provided side by side, vertically, or horizontally, vertically. Therefore, the underground pipes arranged along the installation route are sequentially covered with the protective members made of two cases made of synthetic resin. By locking the locked portion provided in the one case and the locking portion provided in the other case, it is possible to hold the underground pipe covered with the two cases. it can. When the work of covering the underground pipe with the protection member is completed, the plurality of protection members provided side by side or up and down or left and right up and down are:
It can be integrated by means of integrating. In addition, by covering the underground pipe with the two cases, the protrusion provided in the case enters the recess of the underground pipe, and the case moves in the pipe axis direction with respect to the underground pipe. Can be reliably prevented. Further, by forming the case with a synthetic resin, the weight can be reduced, and the protruding portions and the like can be integrally formed when the case is molded. In addition, by making the two cases have the same shape, only one type of case can be used.

[0006] The means may comprise one or more outer peripheral grooves formed on the outer surface of the protection member, and a fastening member for winding and fastening along the outer peripheral grooves.
In the case where the protection member is integrated, the fastening member is wound around the outer circumferential groove and tightened, whereby the tightening member can be positioned in the outer circumferential groove without being displaced with respect to the protective member.

[0007] The locked means is integrally formed on the outer surface of the specific protection member, and the specific protection member is engaged with the specific protection member in the left-right direction, the vertical direction, or the left-right vertical direction in order to lock the locked portion. And a locking portion integrally formed on the outer surface of the other protection member adjacently located. With the above configuration, it is not only necessary to provide a separate fastening member as described in claim 2, but also by simply locking the locked part and the locking part, Can be integrated.

[0008] One end surface of the case in the tube axis center direction is formed on a protruding side curved surface having a predetermined radius of curvature protruding outward toward the center portion in the left-right width direction of the case. The other end surface in the core direction is formed at the same concave radius as the above-mentioned radius of curvature on the concave side curved surface that is more inwardly inward toward the center portion in the left-right width direction of the case. By forming the end face of the case as described above, when the case is arranged along the curved path, a large gap does not occur between the end faces of adjacent cases in the direction of the curved path, and it is securely buried in the ground. Can cover the tube. In the case of a straight path, the concave curved surface of the case located on the upper side of the path and the projecting curved surface of the case located on the lower side of the path come into contact with no gap.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows that a plurality of underground pipes 1 (four in the figure) for accommodating cables such as electric wires are each covered with a protective member 2 and then a plurality of the underground pipes 1 (in the figure). This shows an underground pipe structure in which four (4) protective members 2 are made of synthetic resin (which may be made of cloth or metal) and integrated by a band 3 as a band-shaped tightening member. The underground pipe 1 may be implemented by providing two, three, or five or more pipes in addition to four pipes.

As shown in FIGS. 2 and 3, the underground pipe 1 has convex portions 1A and concave portions 1B alternately arranged on the outer surface in the axial direction of the tube, and they are formed in an annular shape. Although the hose is made of a synthetic resin hose, the hose may be formed in a spiral shape with the convex portion 1A and the concave portion 1B. The material of the underground pipe 1 is preferably a synthetic resin that is advantageous in weight reduction, flexibility, ease of manufacture, and the like, but other materials may be used.

The protective member 2 is composed of two synthetic resin cases 2A, 2A which are vertically divided into two parts. Since these cases 2A, 2A are the same, one of the lower case 2A, as shown in FIGS. 2 and 3, a rectangular bottom wall 4 which is long in the tube axis direction, and which is raised upward from four outer peripheral portions of the bottom wall 4 and has a tube axis direction A pair of front and rear vertical walls 5, 5 formed with semicircular projections 5A located on both sides and into the concave portion 1B of the underground pipe 1 and a pair of left and right vertical walls 6, orthogonal to the pipe axis direction. 6, a plurality of support portions 7 for connecting the pair of left and right vertical walls 6, 6 to increase the shape retention strength of the case 2A and support the underground pipe 1, and the pair of left and right vertical walls 6, 6. Ribs 9 swelling inward at each of four locations before and after the inner surface of 6; Certain of the ribs 9 of the ribs 9,
9 as projections extending upward from the upper end of the projection 9
0, and holes 11, 11 as locked portions formed downward from the upper end surfaces of the remaining ribs 9, 9. Therefore, two cases 2 for the underground pipe 1
A, 2A are covered from the upper and lower directions, so that the convex portions 10, 10 of the case 2A, 2A and the holes 11, 11
And the pair of front and rear protrusions 5A, 5A does not enter the recess 1B of the underground pipe 1 and the underground pipe 1 does not move in the pipe axis direction with respect to the cases 2A, 2A. It is configured as follows. By forming the protruding portion 5A by inserting the support portion 7 into the concave portion 1B of the underground pipe 1, the underground pipe 1 is further prevented from moving in the pipe axis direction with respect to the cases 2A, 2A. There are advantages that can be. Further, an outer peripheral groove M for preventing the tightening band 3 from entering and being displaced substantially in the center of the pair of left and right vertical walls 6, 6 and the bottom wall 4 in the tube axis direction (front-back direction). Although it is formed, it may not be necessary. The protrusion 10,
The number, shape, formation position, and the like of the holes 10 and the holes 11, 11 may be other than those shown in the drawings.

After the underground pipe 1 is sequentially covered with the protective member 2 configured as described above, the tightening band 3 is wound along the outer peripheral grooves M of the four protective members 2 vertically, horizontally and vertically. By tightening, the four protection members 2 can be integrated (see FIG. 1). It is advantageous in terms of handling that the protection member 2 is configured to cover only one underground pipe 1, but the protection member 2 is configured to cover two or more underground pipes 1. You may.

In addition to integrating a plurality of the protective members 2 with a fastening band 3, the protective member 2 may be configured as shown in FIG.
That is, the locking projections 12 are integrally formed on two outer surfaces (upper surface and right side surface) adjacent to each other in the outer peripheral direction of the one protection member 2 located on the upper side, in a posture along the tube axis direction (longitudinal direction), In addition, a locking groove 13 for locking the locking projection 12 on the right side surface is formed in the remaining one outer surface (left side surface) along the tube axis direction (longitudinal direction), and is located on the lower side. A locking groove 13 for locking the locking projection 12 on the upper surface is formed on the lower surface of the other protective member 2 along the tube axis direction (longitudinal direction). Are locked so that they can be connected to each other. By simply providing the locking projection 12 and the locking groove 13 on the protective member 2 as described above, not only the above-mentioned special tightening band 3 can be eliminated, but also the connection operation can be performed only by locking. be able to. In addition, as shown in FIGS. 5 and 6, by forming the convex portion 10 and the hole 11,
There is an advantage that the lock between the cases 2A, 2A can be easily prevented from being released. In the figure, a bulging portion 10a having a larger diameter than the other portion is formed at the tip of the convex portion 10, and a larger diameter than the hole 11 capable of accommodating the bulging portion 10a is provided at the back of the hole 11. Although the housing portion 11a is formed, the shapes of the protrusion 10 and the hole 11 are not limited to the shapes shown in the drawings.

Further, as shown in FIG. 7, a vertical groove 15 is formed on the left and right lateral side surfaces of the protective member 2 so as to be wider toward the inner side (inward). Groove 17,
The locking member 14 having the shape shown in the figure to be locked at the same time as the locking member 17 may be separately manufactured and implemented.

Further, by forming the two cases 2A, 2A constituting the protective member 2 from the projections 10, 10 and the holes 11, 11, the locking of the two is released, and the inspection and replacement of the case are performed. Has the advantage that it can be easily performed,
The locking and fixing configuration shown in FIGS. 5 and 6 may be used,
Although not shown, a plurality of locking projections having claws and the like for locking and fixing the two to the cases 2A, 2A and the same number of locking grooves for locking the locking projections are provided. Alternatively, the two cases 2A, 2A integrated by locking may be locked and fixed so that they cannot be easily removed.

As shown in FIG. 8, the cases 2A, 2A
Is formed on a protruding side curved surface having a predetermined radius of curvature that protrudes outward toward the center in the left-right width direction of the cases 2A, 2A, and the case 2A, 2A.
The other end surface 2C in the tube axis center direction is formed with the same radius of curvature as the above-mentioned radius of curvature on the concave side curved surface which is more inwardly inward toward the center in the width direction of the cases 2A, 2A. Therefore, by covering the underground pipe 1 disposed on the curved path shown in the figure with the cases 2A, 2A, it is possible to avoid the generation of a gap between the adjacent protection members 2, 2 on the curved path. I can do it. In the drawing, there is no gap because the degree of curvature of the curved path is relatively small. However, even when the degree of curvature is large, a large gap is generated between the protection members 2 and 2. Can be avoided. Although not shown in the drawing, in the straight path, the projecting side curved surface 2B and the concave side curved surface 2B are used.
C can be brought into contact with no gap.

[0017]

According to the first aspect of the present invention, the structure in which the two cases are locked prevents the cases from being unlocked unexpectedly and facilitates the work of covering the underground pipe with the case. In addition to being able to be performed quickly and at the same time, the case groups can be integrated by means of integrating the case groups. An advantageous underground pipe structure can be provided on any of the surfaces. Further, by forming the case with a synthetic resin, the weight can be reduced, and the protrusions and the like can be integrally formed at the time of molding the case, which is more advantageous in manufacturing. Also, by making the two cases the same shape, only one type of case can be used, which is more advantageous in terms of manufacturing.

According to the second aspect of the present invention, the tightening member is wound around the outer circumferential groove and tightened, whereby the tightening member can be positioned in the outer circumferential groove without being displaced with respect to the protection member. A high underground pipe structure can be used.

According to the third aspect, there is no need to provide a separate fastening member as described in the second aspect, which is advantageous not only in terms of cost but also in terms of the locked portion and the locking portion. Can be integrated by simply locking the two, and the operation of locking the case and the operation of integrating the plurality of protective members can be performed at once (simultaneously), as shown in claim 1.
Work can be further speeded up.

According to the fourth aspect, by forming the end surface of the case into a curved surface, when the cases are arranged along the curved path, a large gap is generated between the end surfaces of adjacent cases in the direction of the curved path. The underground pipes can be covered without any problems, and it is not necessary to create a case with a shape that matches the curved path, and the same case can be used for any path, which is advantageous in terms of cost. Become.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a plurality of protective members are integrated with a band.

FIG. 2 is a cross-sectional plan view showing a state in which a protection member covers an underground pipe.

FIG. 3 is an exploded perspective view showing a state immediately before the underground pipe is covered with a protection member.

FIG. 4 is a perspective view showing a state in which a plurality of protection members having different shapes are integrated.

FIG. 5 is a perspective view of a main part of a case showing another locking structure of the protection member.

6 is a longitudinal sectional view showing a state where the locking projection and the hole shown in FIG. 5 are locked.

FIG. 7 is a perspective view showing a state immediately before a plurality of protective members are integrated by another means.

FIG. 8 is a plan view showing a state where protection members having different shapes are connected along a curved path.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Underground pipe 1A Convex part 1B Concave part 2 Protective member 2A Case 2B Projection side curved surface 2C Concave side curved surface 3 Tightening band 4 Bottom wall 5 Vertical wall 5A Projection 5a Top surface 6 Vertical wall 7 Support part 8 Hole 9 Rib 10 Protrusion 11 Hole 11a Housing 1212 Locking projection 13 Locking groove 14 Locking member 15 Vertical groove M Outer peripheral groove

Claims (4)

[Claims] 1. A synthetic resin made by dividing one or a plurality of underground pipes in which convex parts and concave parts are alternately located in the pipe axis direction and which are formed in an annular or spiral shape into two parts. An underground pipe structure in which a cross-sectional shape of a case is configured to be sequentially covered by a substantially rectangular protective member, wherein a locking portion and a locked portion for locking and holding the two cases are provided. In both cases, the two cases cover the underground pipe so that the case has a protruding portion that enters the recess of the underground pipe, and is provided in the left-right direction or the up-down direction or the left-right up-down direction. An underground pipe structure comprising means for integrating a plurality of the protective members. 2. The device according to claim 1, wherein said means comprises one or more outer peripheral grooves formed on an outer surface of said protective member, and a tightening member for winding and tightening along said outer peripheral grooves. Underground buried pipe structure. 3. A locked portion provided on an outer surface of the specific protection member, and the specific protection member is connected to the specific protection member so as to be locked with the locked portion. The underground pipe structure according to claim 1, further comprising a locking portion provided on an outer surface of the other protection member positioned adjacently in the up-down direction. 4. An end face in the tube axis direction of the case is formed as a projecting-side curved surface having a predetermined radius of curvature projecting outward toward the center in the left-right width direction of the case, and 2. The underground according to claim 1, wherein the other end face in the tube axis direction is formed on the concave side curved surface which is more inwardly inward toward the center in the left-right width direction of the case and has the same radius of curvature as the radius of curvature. Buried pipe structure.