JP2000136540A - Manhole rise frame for large septic tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole rise frame for a large septic tank, enhancing the operational efficiency of manhole construction work. SOLUTION: A rise frame 11 comprises at least two rectangular cylinders of different bores, one of which is telescopically slidably fitted into the other along their height direction. At each corner of the outer cylinder 15 having the larger bore, two inclined faces 12b, 12b serving as the extensions of two adjacent sides have respective predetermined lengths, face each other with a gap 17 of a certain distance to each other, and are coupled together at their terminals to project in the diagonal direction. At each corner of the inner cylinder 16 having the smaller bore, two inclined faces 13b, 13b serving as the extensions of two adjacent sides are integrally coupled to form a slide part 18. The slide parts 18 are vertically slidably engaged in the gaps 17 formed at the four corners of the outer cylinder 15. After height adjustments, a bolt 20 is passed through an oblong hole 13e and a bolt hole 12f which are bored in the inclined faces 12b, 13b, and is fastened with a nut 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole rising frame for a large-sized septic tank, which is located between a buried septic tank main body and the ground and forms a vertical passage for installing a manhole in the septic tank main body. This is a novel structure of a manhole rising frame. In particular, by making the height of the rising frame freely adjustable, the height at the time of installation can be adjusted and a required gradient can be obtained.

[0002]

2. Description of the Related Art Generally, a large-sized septic tank main body is composed of an anaerobic filter bed tank,
It consists of a contact aeration tank, a sedimentation tank, a disinfection tank, and an inflow pipe and an outflow pipe for the material to be treated.A rising frame is installed between the manhole cover on the surface of the ground and the large septic tank body to form a passage for maintenance. ing.

Conventionally, a fixed type raising pipe has been generally used as the rising frame. As shown in FIG. 10, the fixed type raising pipe is constituted by a cylindrical pipe 1 or a square pipe formed by using FRP or the like.
As shown in FIG. 11, which is an enlarged view of the portion A in FIG. 10, a concave groove 1a is formed on the outer wall surface of the tube body 1, and the frame members 2, 2 are formed in the concave groove 1a as shown in FIG. A fixed type raising pipe which is assembled and maintains a predetermined strength is constituted. The uppermost frame member 2 also serves as a member on which the manhole cover member is placed.

[0004]

However, it is necessary to prepare various types of fixed lifting pipes having different dimensions depending on the depth at which the large septic tank body is buried in the ground, and manholes are used for draining and draining. It is necessary to provide a slight gradient (2 to 3 degrees), but in the past, this was addressed by cutting the rising frame at the installation site.
Therefore, there is a problem that the work efficiency at the time of constructing the manhole when installing the large septic tank is reduced.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a manhole rising frame for a large septic tank which solves the above-mentioned problems of the conventional rising frame and improves the working efficiency at the time of manhole construction. It is.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention achieves a height by fitting at least two rising frames having a difference in diameter in a nested manner so as to be slidable in the height direction. The present invention basically provides a large-sized septic tank manhole rising frame capable of adjusting the height and a large-sized septic tank manhole rising frame capable of adjusting the height and setting a gradient required for drainage. Then, a configuration is provided in which at least two rising frames are fixed from inside or outside after height adjustment. Furthermore, it is a rising frame in which at least two rectangular cylinders having a difference in diameter are nested and slidably fitted in the height direction in a nested manner. Two inclined surfaces, which are extensions of the sides, are of a predetermined length, face each other with a gap of a certain distance therebetween, and their end portions are joined to project diagonally, and a small-diameter inner cylinder body The two corners, which are extensions of two adjacent sides, are integrally joined to provide a large-sized septic tank manhole rising frame that is slidably fitted into the gap and protrudes diagonally. Further, the present invention provides a structure in which the outer cylinder and the inner cylinder are fixed with screws from inside or outside.

[0007] A long hole is formed in the inclined surface of one of the large and small square cylinders, and a bolt insertion hole facing the long hole is formed in the inclined surface of the other one of the large and small square cylinders. After the total length of the rectangular cylinder is adjusted, a bolt is inserted into the bolt insertion hole and the elongated hole, and the bolt is fastened and fixed with a nut.

[0008] Further, the rectangular cylindrical body includes a side wall portion, an inclined surface which is inclined to the left and right sides of the side wall portion and protrudes diagonally with a predetermined width, and a flat surface which connects the inclined surfaces at both upper and lower sides of the side wall portion. The inclined surface is formed with four cutouts, and the inclined surface is formed with a cut-out portion which forms a gap between the inclined surface and an adjacent inclined surface and slidably engages the inclined surface of the inner cylindrical body. A reinforcing portion having a U-shaped cross section is formed on the side wall portion, and when the inner and outer cylindrical bodies are assembled, the lower flat surface of the inner cylindrical body engages with the inner surface side of the reinforcing portion to form the inner side. It is characterized in that the cylinder is prevented from falling off from the outer cylinder.

According to the manhole rising frame for a large septic tank, the rising frame according to the present invention is mounted between the large septic tank body buried under the ground and the ground at the time of the manhole construction work, and a nested large- and small-diameter square cylinder. One body can be pulled out from the other and the height adjusted to accommodate the burial depth of the large septic tank body, and the manhole cover for the large septic tank can be installed with the manhole cover attached at the top. Therefore,
The efficiency of manhole construction can be improved. In addition, draining on the ground surface can be improved by providing a slight gradient to one of the drawn-out parts.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a manhole rising frame for a large septic tank according to the present invention will be described below. According to the first embodiment of the present invention, a plurality of rectangular cylinders having a difference in diameter are fitted in a nested manner so as to be slidable in the height direction, and the corners of the large-diameter outer cylinder are The two inclined sides of the adjacent sides face each other with a gap therebetween, and the ends are joined. The corners of the small-diameter inner cylindrical body are integrally joined with the inclined sides of the adjacent two sides. It is characterized in that it is slidably fitted in the gap.

FIG. 1 is a perspective view of a main part of a large septic tank using a manhole rising frame 11 for a large septic tank according to the present invention. The rising frame 11 is composed of an outer cylindrical body 15 and an inner cylindrical body 16.
The outer cylinder 15 is shown in FIG. 2, the inner cylinder 16 is shown in FIG.
Each of the four molded articles 12 and 13 made of a hard vinyl chloride resin as shown is formed into a rectangular cylinder, and four corners thereof are connected by bolts 14a and nuts 14b to form two large and small rectangular cylinders. The inner cylindrical body 16 is assembled into the outer cylindrical body 15 in a nested manner inside and outside so as to be slidable in the height direction.

In FIG. 2, the molded product 12 has a side wall 12a provided with a reinforcing portion 12e projecting outward in a U-shape in cross section, and slopes 12b inclined outwardly at both left and right ends of the side wall 12a. , 12b and flat surfaces 12c, 12c on both sides in the vertical direction are integrally formed, and the inclined surfaces 12b, 12b are formed.
A plurality of bolt insertion holes 12d are formed in 12b. The inclination angle of the inclined surface 12b with respect to the side wall 12a is:
When the diameter of the outer cylinder 15 is square, it is approximately 45 degrees. The reinforcing portions 1 are provided at both ends of the upper flat surface 12c.
Notches 12g, 12g reaching 2e are formed.
The notch 12g has one bolt insertion hole 12f.

In FIG. 3, the molded product 13 has a substantially flat side wall 13a, and slopes 13b, 13b which are inclined outwardly at both left and right ends of the side wall 13a, and are flat on both sides in the vertical direction. The surfaces 13c and 13c are integrally formed,
A bolt insertion hole 13d is provided on the upper side of the inclined surfaces 13b, 13b.
However, a long hole 13e is formed in the lower side. Slot 13
e is provided at a position where it can face the bolt insertion hole 12f. The angle of inclination of the inclined surface 13b with respect to the side wall portion 13a is approximately 45 degrees when the inner cylinder 16 has a square diameter. The inclined surface 13b can engage with the notch 12g.

Therefore, the four molded products 13 are placed on the inclined surface 13.
b, 13b so that they contact each other.
After forming the inner cylindrical body 16 by connecting the bolts 14a and the nuts 14b through the bolt insertion holes 13d to form the inner cylindrical body 16, the side walls 12a of the molded article 12 are applied to the outside of the four side walls 13a. , The flat surface 13c enters the inner surface of the reinforcing portion 12e, and the inclined surfaces 12b, 12b
Of the bolt 14a and the nut 14a through the bolt insertion hole 12d.
The outer cylindrical body 15 is formed by combining at b.

Therefore, as shown in FIGS. 4 to 6, the lower flat surface 13c of the inner cylinder 16 enters the reinforcing portion 12e to prevent the inner cylinder 16 from coming off from the outer cylinder 15 (FIG. 6). In addition, two inclined surfaces 12b, 12b are inserted into the gap 17 formed with the notches 12g, 12g facing each other.
A rising frame 11 composed of an inner and outer double cylindrical body is formed in which a sliding portion 18 integrally formed by a nut 4b and a nut 14b is slidably engaged in a vertical direction (see FIGS. 7 and 8).

Thus, a gap 17 having a predetermined width W and length L is formed diagonally on the inner surface of the four corners of the outer cylinder 15. The inner cylindrical body 16 is formed with a diagonal slide portion 18 having a predetermined length L1 that fits into the gap 17. That is, the gap 17 is designed so as to have a width W approximately twice as large as the thickness T of the molded article 13 and L1 is smaller than L.

Then, after the inner cylinder 16 is pulled out from the outer cylinder 15 to a required height or is retracted to adjust the height,
The bolt 2 is inserted into the bolt insertion hole 12f corresponding to the long hole 13e.
0 can be inserted and fastened with a nut 21 to fix its height.

Therefore, as shown in FIG. 1, the rising frame 11 is mounted between the large septic tank main body 22 buried in the ground and the ground and the septic tank side mounting frame 23 at the inspection opening of the large septic tank main body 22, The rising frame 11 according to the present embodiment is mounted on the upper surface of the septic tank side mounting frame 23, and the height of the inner cylindrical body 16 of the rising frame 11 is adjusted to the dimension between the large septic tank main body 22 and the ground. Insertion hole 12f and long hole 1
3e, a bolt 20 is inserted therethrough and fastened with a nut 21 for fixing, a manhole cover mounting frame 24 is mounted on the upper surface of the rising frame 11, and a manhole cover 25 is further mounted on the manhole cover mounting frame 24, for a large-sized septic tank. Manhole construction is completed. After the height is adjusted, the outer cylinder 15 and the inner cylinder 16, which are at least two rising frames, may be fixed from the inside or outside by a known means such as a screw.

According to the first embodiment of the present invention described above,
By setting the size of the clearance C of the gap 17 to be large or small, the inclination angle of the outer cylinder 15 with respect to the inner cylinder 16 in the vertical direction can be freely set to be large or small. That is,
One of the two opposing side walls 13a, 13a can be set higher than the other. In addition, molded articles 12 and 13
By freely changing the dimensions of the main body, it is possible to cope with manhole construction of any large-sized septic tank main body, and the versatility can be improved.

Next, a second embodiment of the present invention will be described with reference to FIG. The same reference numerals are given to the same configurations as the first embodiment described above, and description thereof will be omitted. In the second embodiment, the outer cylinder 15 and the inner cylinder 16 are fixed.
Instead of the bolts 20 and the nuts 21 inserted into the long holes 13e, the outer cylinder 15 and the inner cylinder 16 are fixed by screws at appropriate locations from inside or outside with screws 26. Further, the flat surface 13c at the lower part of the inner cylinder 16 may be omitted.

[0021]

As described above, according to the manhole rising frame for a large septic tank according to the present invention, the inclined surfaces of the four molded products are aligned at the time of the construction of the manhole, and the molded products are connected using the connecting tool. By doing so, it is possible to form a rising frame consisting of at least two rectangular cylinders that fit inside and outside in a nested manner, and since the height of the rising frame can be adjusted to the dimension between the large septic tank body and the ground, In addition, it is possible to form a passage for installing a manhole in the large septic tank main body with high work efficiency.

Since the volumes of the two types of molded products according to the present invention are smaller than the rising frame as a finished product, a large space volume is not required at the time of transportation or storage, thereby improving transportation efficiency and minimizing storage space. Is enough. Further, since the operation of connecting the molded products by aligning the inclined surfaces of the four molded products can be easily performed, the work efficiency of assembling the rising frame is improved.

Further, the molded product is surrounded by inclined surfaces on both left and right sides of the side wall portion and flat surfaces on the upper and lower sides, and a reinforcing portion having a U-shaped cross section is provided on the side wall portion of the molded product forming the outer cylinder. , Square tube body has increased strength and pressure resistance against external pressure.Furthermore, by freely changing the dimensions of the molded product forming the inner cylinder and the outer cylinder, it can be used for manhole construction of various large septic tank bodies. It is possible to respond and the versatility can be improved.

Further, since the flat surface formed at the lower portion of the side wall of the inner cylinder is engaged with the inner surface of the side wall of the outer cylinder, the inner cylinder is prevented from falling out of the outer cylinder. can do.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state in which a rising frame according to the present invention is attached to a large-sized septic tank main body.

FIG. 2 is a perspective view showing components of a rising frame according to the present invention.

FIG. 3 is a perspective view showing other components of the rising frame according to the present invention.

FIG. 4 is a perspective view showing a rising frame according to the present invention.

FIG. 5 is a plan view showing a rising frame according to the present invention.

FIG. 6 is a front view showing a rising frame according to the present invention.

FIG. 7 is a sectional view taken along the line AA of FIG. 5;

FIG. 8 is a sectional view taken along line BB of FIG. 7;

FIG. 9 is a sectional view of a main part of a rising frame according to the present invention.

FIG. 10 is a side view showing an example of a conventional rising frame.

11 is an enlarged view of a portion A in FIG.

FIG. 12 is an external view showing an example of assembling a conventional rising frame.

[Explanation of symbols]

 11 ... Rising frame 12, 13 ... Molded product 12a, 13a ... Side wall 12b, 13b ... Slope 12c, 13c ... Flat surface 12d, 12f, 13d ... Bolt insertion hole 13e ... Slot 14a ... Bolt 14b ... Nut 15 ... Outside Cylindrical body 16 ... Inner cylindrical body 17 ... Gap 18 ... Sliding part 20 ... Bolt 21 ... Nut 22 ... Large septic tank body 23 ... Septic tank side attachment frame 24 ... Manhole cover attachment frame 25 ... Manhole cover Reference number P2865

Claims (9)

[Claims] A manhole for a large septic tank characterized in that the height can be adjusted by fitting at least two rising frames having a difference in diameter in a nestable manner in a slidable manner in a height direction. Rising frame. 2. A height necessary for drainage is set by adjusting at least two rising frames having a difference in diameter in a nested manner so as to be slidable in a height direction. A rising frame for manholes for large septic tanks. 3. The manhole rising frame for a large septic tank according to claim 1, wherein at least two rising frames are fixed from inside or outside after adjusting the height. 4. A rising frame formed by fitting at least two rectangular cylinders having a difference in diameter with each other so as to be slidable in a height direction in a nested manner. Two inclined surfaces, which are extensions of two adjacent sides, have a predetermined length, face each other with a certain distance therebetween, and are joined at their ends to project diagonally, and have a small diameter. A large septic tank characterized in that two inclined surfaces, which are extensions of two adjacent sides, are integrally connected to a corner portion of the inner cylindrical body, slidably fitted in the gap, and project diagonally. Manhole rising frame. 5. The manhole rising frame for a large septic tank according to claim 4, wherein the outer cylinder and the inner cylinder are fixed from inside or outside by screws. 6. An elongated hole is formed in the inclined surface of one of the large and small square cylinders, and a bolt insertion hole facing the elongated hole is formed in the inclined surface of the other one of the large and small square cylinders. A bolt is inserted into the bolt insertion hole and the elongated hole, and is fixed by fastening with a nut after adjusting the total length of the rectangular cylinder.
The rising frame for a large-sized septic tank described in the above. 7. The rectangular cylindrical body includes a side wall, an inclined surface that is inclined to the left and right sides of the side wall and protrudes diagonally with a predetermined width, and a flat surface that connects the inclined surfaces at both upper and lower sides of the side wall. 7. The manhole rising frame for a large-sized septic tank according to claim 4, comprising four molded articles. 8. The inclined surface is formed with a notch formed in such a manner that a gap is formed between the inclined surface and an adjacent inclined surface so that the inclined surface of the inner cylindrical body is slidably engaged. 7. A manhole rising frame for a large septic tank according to 7. 9. A reinforcing portion having a U-shaped cross section is formed on a side wall portion, and when the inner and outer cylinders are assembled, a lower flat surface of the inner cylinder engages with the inner surface side of the reinforcing portion. The manhole rising frame for a large-sized septic tank according to claim 4, 5 or 6, wherein the body is prevented from falling off the outer cylinder.