JP6177716B2 - Sewer main installation device connected to manhole - Google Patents

Description

  The present invention relates to an attachment device at a connecting portion between a sewer main and a manhole through which sewage discharged from homes, business establishments, public facilities and the like flows.

  The sewer main and manhole are connected by drilling the peripheral wall of the manhole and attaching the sewer main to the drilled hole. At this time, as disclosed in Japanese Patent No. 3237748, an elastic cylinder formed of an elastic material such as rubber is disposed between the manhole peripheral wall and the sewer main. Further, a double-structured ring composed of an inner ring and an outer ring is attached to the inner peripheral side of the elastic cylinder. Of these two rings, the inner ring has a shape in which the side that enters the manhole matches the curvature of the peripheral wall of the manhole. Is provided. Further, the outer ring is formed so that a part of the ring is divided, and one end and the other end of the divided part are overlapped with each other inside and outside. Then, bolts, screws and other fasteners are screwed into the screw holes provided on the inner peripheral side of the inner ring, and by tightening the fasteners, the tips of the fasteners are connected to the outer ring. Is pressed from the inner peripheral side. As a result, the outer ring expands and comes into contact with the entire circumference on the inner circumference side of the elastic cylinder, and the elastic cylinder is pressed between the drilled hole in the peripheral wall of the manhole and the outer ring. For this reason, the elastic cylindrical body provides seismic performance to the connection point between the sewer main and the peripheral wall of the manhole.

Japanese Patent No. 3237748

  However, in the above attachment device, when each fastener is tightened, the axial force generated by the rotation of the fastener is transmitted to the inner peripheral side of the outer ring. From this, there is a problem that the outer ring is attached with the fastener and is displaced from a predetermined position on the inner peripheral side of the elastic cylinder, and further, the outer ring is detached from the elastic cylinder. there were. Therefore, since an operation for adjusting the outer ring so as to remain at a predetermined position of the elastic cylinder is required, labor is increased, and an efficient countermeasure is required.

  This invention is made | formed in view of the said subject, and is providing the attachment apparatus of the sewer main which connects to the manhole which is easy to construct and can raise work efficiency.

The invention according to claim 1 of the present invention is an attachment device for attaching a sewer main to a peripheral wall of a manhole, and includes an elastic cylinder, an inner ring, and an outer ring. The end of the tube having the other side opening fits the outer periphery of the end of the sewer main, and the end having the one side opening of the tube is inserted through the hole in the peripheral wall of the manhole. It is arranged on the inner peripheral side of the opening on the one side that is inserted through the hole in the peripheral wall of the manhole of the elastic cylinder, and has a plurality of screw holes at intervals over the entire circumference of the ring. A fastener is screwed into the joint hole from the inner periphery, and the outer ring is arranged between the elastic cylinder and the inner ring, and can be expanded by the inner ring's fastener. The inner ring and the outer ring have a locking portion on one of them, and the other has a locked portion that locks with the locking portion. Part is the inner ring The rest are connected to the manhole, characterized in that are engaged movably only in a predetermined range in the circumferential direction of the outer ring.

In the invention according to claim 2 of the present invention, the outer ring is divided, the divided one end portion is provided with a guide portion, and the other end portion is provided with a guided portion. Is characterized in that the guided portion is moved only in the circumferential direction of the outer ring .

According to a third aspect of the present invention, the locking portion and the locked portion are formed so as to be movable within a predetermined range in the circumferential direction of the inner ring or the outer ring by a guide groove or hole provided in either of them. It is characterized by being .

According to the invention of the first aspect of the present invention, the locking portion provided on the inner ring and the outer ring and the locked portion are locked, so that the elastic cylinder is pressed by the outer ring by the fastener. Thus, when the outer ring is about to rotate with the axial force generated by the rotation of the fastener when it is tightened, the axial force is increased by the locking of the locking part of the inner ring and the outer ring and the locked part. Resist. Accordingly, the outer ring can be held at a predetermined position on the inner peripheral side of the elastic cylindrical body. Therefore, when the outer ring is tightened with the fastening tool, it is not necessary to adjust the outer ring so as to remain at a predetermined position of the elastic cylindrical body, and efficient construction can be performed. Et al is, since the engaging portion and the engaged portion are engaged to be movable only within a predetermined range in the circumferential direction of the outer ring, depending on the expansion of the outer ring by the pressing from the fastener The locking portion and the locked portion move in the circumferential direction of the outer ring within a predetermined range. Furthermore, since the locking part and the locked part hold the locked state in the hole insertion direction of the outer ring, the outer ring rotates together with the axial force generated by the rotation of the fastener. Without this, the outer ring can be stably and easily attached to the elastic cylinder.

According to the invention described in claim 2 of the present invention, the expanding operation of the outer ring is performed by the guide part and the guided part respectively provided at the one end part and the other end part of the outer ring. By guiding accurately in the direction, the outer ring can be accurately attached to the inner peripheral side of the elastic cylinder. Furthermore, due to the generation of the axial force during tightening by the tightening tool, the one end portion and the other end portion of the outer ring are pulled in directions opposite to each other due to frictional resistance with the elastic cylindrical body. For this, since the guide part and the guided part that are provided at the one end part and the other end part are restricted from moving in the hole insertion direction of the outer ring, the distance between the one end part and the other end part of the outer ring is separated. The outer ring does not expand in the hole insertion direction.

According to the invention described in claim 3 of the present invention , the outer ring is slidable and expanded only in the circumferential direction by the receiving member disposed between the one end and the other end where the outer ring is divided. To do. Thereby, when each fastening tool presses and expands the inner peripheral side of the outer ring, both divided end portions of the outer ring are not expanded without being separated, and the outer ring is The inner peripheral side can be reliably pressed.

It is the sectional view on the AA line in FIG. 2 (a) which shows the construction state of the attachment apparatus by this implementation. (A) which shows the construction state of the attachment apparatus by this implementation, (a) is the front view which notched some seen from the inside of a manhole, (b) is the BB sectional drawing in (a). (A) of the elastic cylinder by this implementation is a front view, (b) is CC sectional view taken on the line in (a). (A) of the inner ring according to the present embodiment is a front view, (b) is a longitudinal sectional view showing an action state of the fastening tool that is shown by enlarging E in (a), (c) These are DD line sectional drawings in (a). (A) of the outer ring by this implementation is a front view, (b) is a cross-sectional view taken along line FF in (a), and (c) is a simplified view showing G in (b). FIG. (A) which shows the operation state of the inner ring and the outer ring at the time of construction of the attachment device by this execution is a front view, (b) is a longitudinal section which expands the principal part of (a) and shows the state before attachment It is a top view, (c) is a longitudinal cross-sectional view which shows the state after attachment. (A) which shows the operation state of the inner ring and the outer ring at the time of construction of the attachment device by this execution is a top view, (b) is a simplified which shows the state before attachment by expanding the principal part of (a) (C) is the simplified top view which shows the state after attachment.

Below, based on drawing, embodiment of the attachment apparatus of the sewer main which connects to a manhole according to this invention is described.
As shown in FIG. 1, the attachment device according to the present embodiment includes an elastic cylinder 1, an inner ring 2, and an outer ring 3. Here, as shown in FIGS. 2A and 2B, the manhole is a structure having a cylindrical peripheral wall 5 in the present embodiment, and the peripheral wall 5 has a drilling hole 5 a into which the sewer main pipe 4 enters. It is provided. Moreover, since the sewer main pipe 4 has a relatively large diameter in this embodiment, a concrete pipe is used, and the diameter is smaller than the drilled hole 5a provided in the peripheral wall 5 of the manhole. The structure is such that the sewage flowing through the water flows smoothly into the manhole.
The sewer main pipe 4 is made of a vinyl chloride pipe or the like depending on the diameter other than the above concrete pipe.

  As shown in FIGS. 3A and 3B, the elastic cylinder 1 is formed of rubber such as SBR (stal butadiene rubber) in the present embodiment, and the whole is cylindrical. Further, the elastic cylinder 1 is such that one side opening 1a of the cylinder is greatly opened as compared with the other side opening 1b, and an end portion having the other side opening 1b of the elastic cylinder 1 is formed on the outer peripheral portion of the sewer main pipe 4. While being attached, the end portion having the one side opening 1a is inserted into the hole 5a of the peripheral wall 5 of the manhole. Furthermore, the flow path from the one side opening 1a to the other side opening 1b of the elastic cylinder 1 has a tapered shape in which the inner diameter gradually narrows, and the drainage flowing through the sewer main pipe 4 smoothly flows into the manhole. It has become. Further, referring to FIG. 1 as well, an end portion having the other side opening 1b of the elastic cylindrical body 1 is fitted with a fastening and fixing band 6 called a stainless steel band on the outer peripheral portion thereof. The fastening band 6 is fitted over almost the entire circumference of the outer peripheral portion of the elastic cylinder 1 and is fastened with fastening fasteners 7 such as bolts and nuts together with the ends of the fastening band 6. . As a result, the diameter of the fastening and fixing band 6 is reduced and the entire outer periphery of the end of the other side opening 1b of the elastic cylinder 1 is tightened, so that the connection state between the elastic cylinder 1 and the sewer main pipe 4 is ensured. ing. Further, an outer ring installation groove 14 is provided continuously on the entire inner periphery of the inner peripheral portion of the one-side opening 1a of the elastic cylindrical body 1. The outer ring installation groove 14 has an inner ring 2 as described later. And the outer ring 3 are respectively arranged.

  4 (a) and 4 (b), the inner ring 2 is formed of a steel material such as stainless steel in the present embodiment, and is formed on the inner peripheral side of the one side opening 1a of the elastic cylinder 1 described above. The outer diameter of the ring is formed slightly smaller than the inner diameter of the one side opening 1a of the elastic cylinder 1 so that it can be arranged. Further, the end edge on the opening side of the inner ring 2 that enters the manhole has a shape that matches the curvature of the peripheral wall 5 of the manhole. Further, a plurality of screw holes 8 are provided on the inner peripheral side of the inner ring 2 at intervals in the circumferential direction. Further, each screwing hole 8 is temporarily tightened with a fastener 11 having a threaded portion. Furthermore, a locked portion 13 is provided between the screw holes 8 of the inner ring 2. The locked portion 13 has a long hole shape in the circumferential direction of the outer ring 3. In this embodiment, the locked portion 13 is provided at five positions spaced in the circumferential direction of the inner ring 2. The locked portion 13 disposed at the bottom is formed in a round hole shape for positioning the inner ring 2 and the outer ring 3. And the latching | locking part 12 of the outer ring 3 mentioned later penetrates each of said to-be-latched part 13.

  As shown in FIGS. 5A, 5B, and 5C, the outer ring 3 can be expanded because a part of the outer ring 3 is divided in the circumferential direction. With reference also to (a), the diameter can be adjusted so that the elastic cylinder 1 can be disposed between the one-side opening 1a and the inner ring 2. Further, the one end 3a and the other end 3b of the outer ring 3 are divided into one (one end 3a) having a substantially convex guide convex portion (guide portion) 10a and the other (the other end 3b). A guide recess (guided portion) 10b having a substantially concave shape is provided. Thereby, the one end part 3a and the other end part 3b which the outer ring 3 is divided have a structure in which each other fits in an uneven shape in plan view. By fitting the guide convex portion 10a and the guide concave portion 10b, the divided one end portion 3a and the other end portion 3b are allowed to move only in the circumferential direction of the outer ring 3, but the outer ring 3 in the hole insertion direction is permitted. Movement is regulated. Furthermore, a plate-shaped receiving member 9 is attached to the inner peripheral portion of the divided one end portion 3a. The receiving member 9 extends from the inner peripheral portion of the one end 3 a of the outer ring 3 toward the other end 3 b of the outer ring 3. Thereby, even if the fastener 11 is located at the positions of the one end 3 a and the other end 3 b of the outer ring 3, the tip of the fastener 11 abuts on the inner peripheral side of the receiving member 9 and Thus, the pressing force from the fastening tool 11 can be transmitted evenly. A locking portion 12 is provided on the inner peripheral portion of the outer ring 3. The locking portion 12 has a rod shape protruding inward from the inner peripheral portion of the outer ring 3. Further, in the present embodiment, the locking portions 12 are provided at five locations spaced in the circumferential direction of the outer ring 3, and when the inner ring 2 is arranged on the inner periphery of the outer ring 3, FIG. As shown in (a), each locking portion 12 is inserted into each locked portion 13 of the inner ring 2.

The attachment procedure of the attachment device formed as described above, and the operation and effect after attachment will be described below with reference to FIGS. 6 (a) to (c) and FIGS. 7 (a) to (c).
The end portion on the side having the one-side opening 1a of the elastic cylindrical body 1 with the sewer main pipe 4 attached is inserted into the hole 5a provided in the peripheral wall 5 of the manhole. Next, the outer ring 3 is arranged in the outer ring installation groove 14 provided on the inner circumference side of the one side opening 1 a of the elastic cylinder 1, and the inner ring 2 is arranged on the inner circumference of the outer ring 3. At this time, since there is a gap S between the elastic cylinder 1 and the outer ring 3, the fasteners 11 temporarily tightened in the screw holes 8 of the inner ring 2 are respectively fastened. The inner ring side of the outer ring 3 is pressed at the tip of each fastener 11 to expand the outer ring 3.
At this time, as shown in FIGS. 6A to 6C, the outer ring 3 transmits the axial force generated when each of the fasteners 11 is tightened to the inner peripheral portion so that the tip of the fastener 11 is moved. The outer ring 3 is provided at the center, and the outer ring 3 tends to be detached from a predetermined position of the elastic cylinder 1. On the other hand, each locking portion 12 provided on the inner peripheral portion of the outer ring 3 is inserted into the locked portion 13 corresponding to each of the inner rings 2, and locked in the hole insertion direction of the outer ring 3. By this, it becomes a structure which resists the axial force generated at the time of fastening of the fastener 11. Furthermore, the outer ring 3 is pushed and expanded toward the elastic cylinder 1 by the pressing force from the tip of each fastener 11, but the locked portion 13 of the inner ring 2 is formed in a long hole shape in the circumferential direction. As shown in FIGS. 7A to 7C, the locking portion 12 locked to the locked portion 13 is formed along the elongated hole-shaped locked portion 13 of the outer ring 3. It moves in the circumferential direction and corresponds to the expansion of the outer ring 3 by the fastening tool 11 while maintaining the locked state with the inner ring 2. In addition, as the outer ring 3 expands, the distance P between the one end 3a and the other end 3b of the outer ring 3 also increases, but the guide protrusion 10a at the one end 3a and the guide recess 10b at the other end 3b. The one end 3a and the other end 3b of the outer ring 3 are regulated in the hole insertion direction, but slide only in the circumferential direction of the outer ring 3. Thus, the guide convex portion 10a, the guide concave portion 10b, and the receiving member 9 are always disposed between the one end portion 3a and the other end portion 3b of the outer ring 3 regardless of the degree of expansion of the outer ring 3. The Therefore, even if the outer ring 3 expands and the gap P between the one end 3a and the other end 3b increases, the outer ring 3 always continues in the circumferential direction due to the alignment of the guide convex portion 10a and the guide concave portion 10b. From this, when the outer ring 3 is attached to the inner peripheral side of the elastic cylinder 1, the outer ring 3 is connected to the fastener 11 by the guide convex part 10 a and the guide concave part 10 b being locked in the hole insertion direction. Therefore, it does not rotate and disengage in the hole insertion direction in the elastic cylindrical body 1, and further, it is not necessary to fix the outer ring 3 in order to prevent the above rotation. Further, even if the outer ring 3 is expanded, the receiving member 9 is always arranged on the inner peripheral side of the divided portion. Therefore, even if the fastening tool 11 is positioned at the divided portion, It can receive the pressing force of. From the above, the elastic cylinder 1 is attached to the hole 5a of the peripheral wall 5 of the manhole with high accuracy and stability.

The attachment device with the sewer main 4 connected to the manhole of the present invention is not limited to the shape of each component shown in the above embodiment as long as it is within the range described in the claims.
In addition to the rubber described above, the elastic cylinder 1 has deformation force, weather resistance, and chemical resistance, as well as shear force applied due to ground vibration or inflow of drainage when attached to the sewer main pipe 4 and the peripheral wall 5 of the manhole. It may be formed of a material resistant to earth pressure, load or the like. In addition, the outer ring 3 has a smooth outer peripheral portion in the above embodiment, but when attached to the inner peripheral side of the elastic cylindrical body 1, the outer ring 3 is in contact with the entire inner peripheral circumference of the elastic cylindrical body 1 without a gap. If it is. Furthermore, since the elastic cylinder 1 may be of a structure that can adhere to the entire circumference of the hole 5a of the peripheral wall 5 of the manhole to ensure watertightness, the outer peripheral surface of the outer ring 3 is roughened, It is possible to prevent the deviation by increasing the frictional resistance. Further, the locking portion 12 and the locked portion 13 for locking the inner ring 2 and the outer ring 3 are the rod-shaped members provided on the inner peripheral portion of the outer ring 3 in the above embodiment. It was inserted through the hole, but one of the locking portion 12 and the locked portion 13 was formed into a groove shape long in the circumferential direction of the inner ring 2 and the outer ring 3, and the other was formed as a protruding portion or a hook-shaped portion. The part or the hook-shaped part may be movably locked within the above-described groove forming range. Moreover, the latching | locking part 12 and the to-be-latched part 13 may be provided in any of the inner ring 2 and the outer ring 3 as long as it is the structure which mutually slidably latches in the circumferential direction. Furthermore, the structure of the one end portion 3a and the other end portion 3b that expands or contracts the outer ring 3 is such that the outer ring 3 is continuous in the circumferential direction even when the outer ring 3 expands or contracts due to the pressing of the fastener 11. If it becomes a structure, a shape, a size, etc. will not be limited.

DESCRIPTION OF SYMBOLS 1 Elastic cylinder 1a One side opening 1b The other side opening 2 Inner ring 3 Outer ring 3a One end part 3b Other end part 4 Sewer main pipe 5 Perimeter wall 5a Drilling hole 6 Fastening fixing band 7 Fastening fixing tool 8 Screwing hole 9 Receiving member 10a Guide convex part (guide part)
10b Guide recess (guided part)
11 Fastener 12 Locking portion 13 Locked portion 14 Outer ring installation groove P Interval S Space

Claims (3)

An attachment device for attaching a sewer main to the peripheral wall of a manhole,
An elastic cylinder, an inner ring, and an outer ring are provided. The elastic cylinder has an end having an opening on the other side of the cylinder fitted with an outer periphery of an end of the sewer main, and an opening on the one side of the cylinder. The inner ring is disposed on the inner peripheral side of the one-side opening that is inserted into the hole in the peripheral wall of the manhole of the elastic cylindrical body. A plurality of screw holes are provided at intervals along the circumference, and a fastening tool is screwed into each screw hole from the inner periphery side, and the outer ring is formed of an elastic cylinder and an inner ring. It is arranged in between and formed so that it can be expanded by the appearance of the fasteners of the inner ring,
The inner ring and the outer ring have a locking portion on one of them, and the other has a locked portion that locks with the locking portion .
The sewer main attachment device connected to a manhole, wherein the locking portion and the locked portion are locked so as to be movable only within a predetermined range in the circumferential direction of the inner ring or the outer ring . The outer ring is divided, a guide part is provided at one end of the divided part, a guided part is provided at the other end part, and the guide part is arranged in the circumferential direction of the outer ring. mounting device sewer mains connecting to the manhole of claim 1, wherein the moving only. The locking portion and the locked portion, the guide groove or hole is provided on either claim 1 or, characterized in that are movably formed in a predetermined range in the circumferential direction of the inner ring or outer ring 2. Sewer main installation device connected to the manhole described in 2 .

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