JP3580349B2 - Connection structure between frame and pipe - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connection structure between a body of a sewer manhole, a sewage basin, a rainwater basin, and the like, and a pipe for inflow or outflow of sewage, rainwater, or the like.
[0002]
The `` framework '' referred to in the specification of the present application refers to an underground structure such as a sewer pipe line facility buried underground, a pipe facility below a road surface for water supply and gas piping, an underground facility such as an underground facility for electric power and communication, and the ground. A vertical hole-shaped structure provided for communication is generally referred to.
[0003]
[Prior art]
In a connection structure between a body such as a manhole and a pipe material for inflow or outflow, as a structure capable of adjusting a connection angle of the pipe material with respect to the body, there is, for example, a structure described in JP-A-8-270057. The connection structure described in this publication8As shown in (a), a connecting pipe 4 is connected to one of the cores 2, 3 integrally protruding from a side wall 1 a of the manhole body 1, and a connecting pipe is connected to the other core 3. 5 has a universal joint structure in which a bulging shell portion 6 is attached to one end of the manhole body 1 and is slid and bent while sealing between the core portion 3 and the shell portion 6 with an O-ring or the like. The connection angle of the connection pipe 5 can be adjusted to an arbitrary angle as shown in FIGS.
[0004]
[Problems to be solved by the invention]
However, in what is described in the above publication,8As shown in (b) and (c), the bending point P at which the connecting pipe 5 is bent is shifted from the center (manhole core) O of the manhole main body 1 by a distance D, so that the connecting pipe 5 is particularly bent. Is connected to the manhole body 1 at a large angle, a mirror or the like is inserted near the center O of the manhole body 1 for connection.tubeHowever, there is a problem that it is not possible to see far (deep) when checking the internal condition of No. 5.
[0005]
In addition, when an attempt is made to check the internal state of the connecting pipe 5 by a self-propelled monitoring camera or the like, the monitoring camera is caught near the bending point P of the connecting pipe 5 and cannot travel.
[0006]
As described above, the conventional structure has a problem that the inspection work after connecting the connection pipe 5 to the manhole body 1 is hindered. In particular, such a problem may occur in a so-called small-diameter manhole in which the manhole body 1 has a small diameter, and a countermeasure is desired.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to provide a connection structure between a body and a pipe in which the inside of the pipe can be reliably inspected while the pipe is connected to the body.
[0008]
[Means for Solving the Problems]
The connection structure between the frame and the pipe according to the present invention has a cylindrical shape with a bottom.In a connection structure for connecting the pipe and a skeleton provided with through-holes communicating with the inflow-side and outflow-side pipes on the side walls, one of the through-holes extends along the circumferential direction of the skeleton and the pipe A long hole that is longer than the outside diameter of the pipe, a vertically long communication hole that is larger than the outside diameter of the pipe material communicating with the long hole is provided, and the inner surface is substantially the same as the curvature of the outer peripheral surface of the side wall of the skeleton. And an outer surface which forms a convex curved surface centered on the center of the skeleton, and which is attached to the side wall of the skeleton so as to be rotatable in a circumferential direction, and which is in communication with the communication hole and a rotation member which blocks around the through hole. A connecting portion to which the pipe material is connected, and an inner surface provided at a base end of the connecting portion is a curved surface having substantially the same curvature as an outer surface forming a convex curved surface of the rotating member, and is vertically along the outer surface. A slide slidably mounted to close around the communication hole Comprising an adapter comprising a connecting member having a part, prior to the center of the skeleton on the center line of the tubing is locatedThe pipe member is configured to communicate with the through hole.
[0009]
In the above configuration, the connection angle between the skeleton and the pipe is changed by rotating the adapter in the circumferential direction of the side wall of the skeleton., And further adjusted the connection angle in the vertical directionAs always,Bending point coincides with center of frameAs a result, it is possible to reliably perform an internal inspection of the tube using a mirror or a surveillance camera.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present inventionThe frame has an invert at the bottom, and the groove of the invert has a bottom surface inclined downward from an inflow side to an outflow side of the frame, and an end portion on a side communicating with the through hole provided in a side wall of the frame. The groove width of the groove portion may be formed so as to match the lateral width of the through hole.
[0013]
With such a configuration, the flow of sewage or the like becomes smooth, and the flow is not hindered even when the connection angle between the skeleton and the pipe is changed.
[0014]
Further, it is preferable that the adapter is provided on an inflow side of the skeleton.
[0015]
With such a configuration, the flow of sewage and the like becomes smoother.
[0016]
【Example】
(Example 1)
FIG. 1 is an exploded perspective view of a connection structure between a body and a pipe according to the present invention, and FIG. 2 is an assembled perspective view of FIG.
[0017]
1 and 2, a connection structure 10 between a skeleton and a pipe is constituted by a manhole body 11, an adapter 13, a holding member 14, and the like as a skeleton for relay-connecting the laid pipe. The manhole body 11 has a cylindrical shape with a bottom, and a hole 11e and a through hole 11f are provided through the side wall 11d. The hole 11e is a round hole having a diameter approximately equal to the outer diameter of the outflow pipe 24 as a pipe material, and the outflow pipe 24 is connected to the hole 11e via a joint member 12 described later. The through hole 11f is formed to be larger than the outer diameter of the inflow pipe 25 as a pipe material. In the embodiment, the inner diameter (short diameter) in the vertical direction is substantially the same as the outer diameter of the inflow pipe 25, and is longer in the horizontal direction. It is a long hole (hereinafter, referred to as “long hole 11f”). An inflow pipe 25 is connected to the long hole 11f via an adapter 13 described later so that the connection angle in the circumferential direction can be adjusted. Four insert nuts 17 are provided on the side wall 11d near the four corners of the elongated hole 11f.
[0018]
Further, at the bottom of the manhole body 11, an invert 11a having a groove 11b is provided as shown in FIG. The groove portion 11b is formed such that the groove width at both ends thereof matches the lateral width of the hole 11e and the long hole 11f, and the long hole 11f on the inflow side and the hole 11e on the outflow side are smoothly communicated. In addition, the bottom surface of the groove 11b is a slope that is inclined downward from the inflow side (the long hole 11f) to the outflow side (the hole 11e).
[0019]
Although the groove width of the groove 11b shown in FIG. 3A is tapered from substantially the center toward the long hole 11f side, the groove width is increased from the hole 11e side toward the long hole 11f side. As shown by a two-dot chain line, the shape may be tapered.
[0020]
The joint member 12 has a fixed portion 12b integrally formed on the base end side of the tubular joint portion 12a. The joint portion 12a has an inner diameter substantially equal to that of the hole 11e, and a fastening ring 21 for fixing the outflow pipe 24 is attached to the outer periphery of the distal end portion. The fixing portion 12b is formed in a curved plate shape, and has an inner surface having an arc surface having a curvature substantially equal to a curvature of an outer peripheral surface of the side wall 11d of the manhole body 11. This joint member 12 is formed of a synthetic rubber member. Then, the joint member 12 is attached so that the base end side of the joint portion 12a is aligned with the hole 11e of the manhole body 11, and the fixing portion 12b is tightly fixed to the outer peripheral surface of the side wall 11d by, for example, an adhesive (FIG. 2). ).
[0021]
The joint member 12 may be provided with an insert nut on the side wall 11d of the manhole body 11 to fix the fixing portion 12b with a bolt, or may be formed integrally with the side wall 11d of the manhole body 11. The integral formation in this manner is preferable because the number of parts, the number of assembling steps, and the cost can be reduced.
[0022]
The adapter 13 includes a tubular connecting portion 13a, and a flange portion 13b integrally formed on the base end side of the connecting portion 13a and attached to the side wall 11d of the manhole body 11, and the inner diameter of the connecting portion 13a is defined by the elongated hole 11f. The diameter is substantially the same as the minor diameter. A fastening ring 22 for fixing the inflow pipe 25 is mounted on the outer periphery of the distal end portion of the connection portion 13a. The flange portion 13b has a curved plate shape, is rotatable in the circumferential direction of the side wall 11d of the manhole body 11, and has an inner surface having an arc surface having substantially the same curvature as the outer surface of the side wall 11d. I have. Further, the flange portion 13b has a rectangular shape longer in the lateral direction than the long hole 11f, and the adapter 13 is rotated in the circumferential direction to move the connection portion 13a to one of the left and right sides of the long hole 11f. In a state where it has been moved to the matching end position, the size is such that the gap on any other side of the elongated hole 11f can be closed. At four corners of the peripheral portion of the flange portion 13b, bolt insertion holes 13c long in the horizontal direction (lateral direction) are provided corresponding to the insert nuts 17 provided on the side wall 11d of the manhole body 11. The adapter 13 is made of, for example, plastic such as polypropylene or polyethylene, or a member having flexibility and corrosion resistance such as a synthetic rubber member or an elastomer.
[0023]
The holding member 14 is a curved plate-shaped member having substantially the same size as the flange portion 13b of the adapter 13, and is provided with holes 14a at the center where the connecting portions 13a are inserted. A bolt insertion hole 14b long in the lateral direction is provided corresponding to each bolt insertion hole 13c. The pressing member 14 has an inner surface that contacts the outer surface of the flange portion 13b as a pressing surface, and the pressing surface is an arc surface having substantially the same curvature as the outer surface of the flange portion 13b. The holding member 14 is formed of, for example, a hard resin member or a metal member.
[0024]
When the connection portion 13a of the adapter 13 is inserted into the hole 14a of the holding member 14, the bolt insertion holes 14b of the holding member 14 and the bolt insertion holes 13c of the flange portion 13b match. The adapter 13 is attached to the insert nut 17 via a washer 19 by means of a bolt 18 in which the flange portion 13b is brought into contact with the periphery of the elongated hole 11f of the manhole body 11 and a bolt 18 inserted through each of the bolt insertion holes 14b, 13c. (FIG. 2). That is, the adapter 13 is attached so as to be rotatable in the circumferential direction of the side wall 11d of the manhole body 11 by the width of the bolt insertion hole 13c provided in the flange portion 13b, and in this state, the connecting portion 13a is elongated. 11f. In the present embodiment, the connection portion 13a is configured to be rotatable to a position where the base end side opening end coincides with the left end or the right end of the long hole 11f.
[0025]
Next, a general method of connecting a pipe to the manhole body 11 will be described.
[0026]
As shown in FIG. 2, the manhole body 11 is installed underground with the adapter 13 side as the inflow side and the joint member 12 side as the outflow side. At this time, each bolt 18 is loosely screwed into the insert nut 17, and the adapter 13 is in a state capable of rotating in the circumferential direction of the side wall 11 d of the manhole body 11. Then, the outflow pipe 24 is connected to the joint 12 a of the joint member 12, and the inflow pipe 25 is connected to the connection 13 a of the adapter 13.
[0027]
The connection of the outflow pipe 24 and the inflow pipe 25 to the manhole body 11 is performed sequentially from the downstream side. That is, the connection member 12 is connected to the outflow pipe 24 laid on the downstream side of the manhole body 11 to position the manhole body 11, and the inflow pipe 25 laid on the upstream side of the manhole body 11 is replaced with the outflow pipe 24. The angle is adjusted by rotating the adapter 13 horizontally to the left or right so as to match the desired angle of refraction in the horizontal plane. At this time, it is preferable to provide a graduation for adjusting the angle between the side wall 11d of the manhole body 11 and the adapter 13 because the angle can be easily adjusted and the workability can be improved.
[0028]
Next, the inflow pipe 25 is connected to the adapter 13, the bolt 18 is tightened, and the flange 13 b is pressed against the side wall 11 d of the manhole body 11 by the pressing member 14 and fixed. Thereby, the flange portion 13b of the adapter 13 is brought into close contact with the outer peripheral surface of the side wall 11d by the pressing member 14. Then, the outflow pipe 24 and the inflow pipe 25 are fixed by the coupling members 12 and the fastening rings 21 and 22 of the adapter 13. In this way, the outflow pipe 24 and the inflow pipe 25 are connected at a predetermined angle. When the position of the adapter 13 once fixed is readjusted, the bolt 18 is loosened.
[0029]
Further, as described above, the adapter 13 is formed of a plastic such as polypropylene or polyethylene, or a flexible member such as a synthetic rubber member or an elastomer, so that the connection portion 13a is formed near the base of the flange portion 13b. There is a certain degree of freedom in the vertical direction, and it is possible to cope with a slight vertical shift between the manhole body 11 and the inflow pipe 25.
[0030]
In the above configuration, as shown in FIGS. 3B and 3C, even when the connection angle between the manhole main body 11 and the inflow pipe 25 is variously changed, the manhole main body always remains on the center line La of the inflow pipe 25. The center (manhole core) O of 11 is located. That is, the bending point of the inflow pipe 25 always coincides with the center O of the manhole body 11. Therefore, when inspecting the inside of the inflow pipe 25, it is possible to see the inflow pipe 25 far (deep) by the mirror. Further, the self-propelled surveillance camera does not get caught at the connection between the manhole body 11 and the inflow pipe 25. This makes it possible to reliably check the internal state of the inflow pipe 25. The center O of the manhole body 11 is also located on the center line Lb of the outflow pipe 24.
[0031]
Further, the width of the elongated hole 11f of the manhole body 11 matches the groove width of the groove 11b of the invert 11a communicating with the elongated hole 11f, and the bottom surface of the groove 11b is inclined downward from the inflow side to the outflow side. The surface makes the flow of sewage or the like smooth, and the flow is not hindered even when the connection angle between the manhole body 11 and the inflow pipe 25 is changed.
[0032]
In particular, when sludge such as sewage is included, the sewage is caused to flow in the direction of the arrows in FIGS. 3A to 3C with the adapter 13 side as the inflow side and the joint member 12 side as the outflow side, so that the flange 13 b It is preferable that the flow is not hindered by the base portion 13b ', the accumulation of sludge is prevented, and a smooth flow of sewage is ensured.
[0033]
Conversely, the bottom surface of the groove 11b of the invert 11a may be inclined downward from the joint member 12 toward the adapter 13 with the adapter 13 as the outlet side and the joint member 12 as the inlet side. However, it is preferable that the adapter 13 be on the inflow side and the joint member 12 be on the outflow side as in the present embodiment for the above-described reason.
[0034]
Further, in the present embodiment, the slot 11f on the inflow side of the manhole body 11 to which the adapter 13 is attached is a slot elongated in the horizontal direction (lateral direction), but is not limited to this. A large-diameter round hole whose diameter is the long diameter may be used. However, by forming the elongated hole in the horizontal direction as in the present embodiment, it is possible to prevent the strength of the side wall 11d of the manhole body 11 from being reduced, and to prevent the flange 13b of the adapter 13 and the pressing member 14 from being vertically moved. It is possible to make the shape smaller by narrowing the width in the direction, which is preferable in reducing the weight and cost.
[0035]
Further, in the present embodiment, the flange portion 13b of the adapter 13 is pressed and fixed to the side wall 11d of the manhole body 11 by the pressing member 14, but the plate thickness of the flange portion 13b of the adapter 13 is increased to provide strength. By doing so, the pressing member 14 can be omitted. As a result, reduction in the number of parts, reduction in cost, and the like are achieved.
[0036]
Further, in the present embodiment, the hole 11e and the long hole 11f are arranged on the side wall 11d of the manhole body 11 so as to face each other. However, the present invention is not limited to this, and the outflow side hole 11e and the inflow side long hole are provided. 11f may be provided at a predetermined angle along the circumferential direction.
[0037]
(Example 2)
FIG. 4 is an exploded perspective view of a connection structure between a skeleton and a pipe according to a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the adapter 30 can be rotated not only in the circumferential direction (horizontal direction) but also in the axial direction (vertical direction) with respect to the manhole body 11. It is. Note that members that are the same as or correspond to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0038]
As shown in FIG. 4, the adapter 30 includes a connecting member 31 and a rotating member 32. The connecting member 31 has a sliding portion 31b integrally formed on the base end side of a tubular connecting portion 31a. . The rotating member 32 is provided with a vertically long communication hole 32a at the center. The curvature of the inner surface 32b of the rotating member 32 is substantially the same as the curvature of the outer peripheral surface of the side wall 11d of the manhole body 11, and is a curved surface rotatable in the circumferential direction of the side wall 11d. The outer surface 32c is a convex curved surface, and has the same curvature as an arc centered on the center O of the manhole body 11 (see FIG. 3). Furthermore, bolt insertion holes 32d which are long in the horizontal direction corresponding to the insert nuts 17 are provided at the four corners of the peripheral portion of the rotating member 32, and insert nuts 33 are provided at positions near the four corners of the periphery of the communication hole 32a. ing.
[0039]
The sliding portion 31b has an inner surface 31c having a curved surface having substantially the same curvature as the curvature of the outer surface 32c of the rotating member 32, and is slidable in a vertical direction (up-down direction) with respect to the rotating member 32. Further, a bolt insertion hole 31d which is long in the vertical direction corresponding to the insert nut 33 of the rotating member 32 is provided at the four corners of the peripheral portion of the sliding portion 31b.
[0040]
In the above configuration, as shown in FIG. 5, the turning member 32 is attached to the side wall 11d of the manhole body 11 by a bolt 18 so as to be turnable in the circumferential direction, and the connecting member 31 is attached to the turning member 32 by the bolt 34. It is slidably mounted vertically along the outer surface 32c. That is, the entire adapter 30 is attached to the side wall 11d of the manhole main body 11 so as to be adjustable in both the circumferential direction and the vertical direction indicated by arrows. As a result, the degree of freedom in adjusting the connection angle of the inflow pipe 25 is increased, and the center of the manhole body 11 is always located on the center line of the inflow pipe 25 as in the first embodiment. Can be surely confirmed.
[0041]
(Example 3)
FIG. 6 is an exploded perspective view of a connection structure between a skeleton and a pipe member according to a third embodiment of the present invention. The third embodiment differs from the first embodiment in that the adapter 40 is rotatable in the circumferential direction (horizontal direction) with respect to the manhole body 11 so that the connection angle of the pipe in the circumferential direction can be adjusted, as well as in the axial direction. This is a point that the connection angle of the tube material can be adjusted (in the vertical direction). Note that members that are the same as or correspond to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0042]
As shown in FIG. 6, the adapter 40 is attached to the outer peripheral surface of the side wall 11d of the manhole body 11 via a packing 41. The adapter 40 includes a connection portion 40a and a flange portion 40b, and has a tubular connection portion 40a. A flange 40b is integrally formed on the base end side of the base member. Further, a continuous portion 40c between the base end of the connecting portion 40a and the flange portion 40b has a bellows structure, and the connecting portion 40a can swing vertically (up and down) with respect to the flange portion 40b. I have. The curvature of the inner surface of the flange portion 40b is substantially the same as the curvature of the outer surface of the packing 41 mounted on the outer peripheral surface of the side wall 11d of the manhole main body 11, and the four corners of the peripheral portion are horizontally aligned with the insert nuts 17. A long bolt insertion hole 40d is provided. The adapter 40 is formed of, for example, a resin member.
[0043]
The packing 41 is provided with a horizontally elongated hole 41a in the center corresponding to the elongated hole 11f of the manhole body 11, and has four corners in the horizontal direction corresponding to the insert nut 17 of the side wall 11d of the manhole body 11. A long bolt insertion hole 41b is provided. The packing 41 is formed of, for example, an elastomer or a synthetic rubber member.
[0044]
In the above configuration, the adapter 40 is41Is attached to the side wall 11d of the manhole main body 11 via the through hole so as to be rotatable in the circumferential direction. Therefore, even if the adapter 40 is rotated in the circumferential direction to change the circumferential connection angle of the tube (not shown), the center of the manhole body 11 is always located on the center line of the tube. It has the same effect as 1. Further, in this embodiment, since the connecting portion 40a is capable of swinging in the vertical direction with respect to the flange portion 40b, it is possible to slightly adjust the vertical connecting angle of the tube.
[0045]
(Example 4)
FIG. 7 is an exploded perspective view of a connection structure between a frame and a pipe according to a fourth embodiment of the present invention. The fourth embodiment is different from the first embodiment in that the adapter 50 is rotatable in the circumferential direction with respect to the manhole body 11 in a state where the bolts 18 for attaching the adapter 50 to the manhole body 11 are tightened. Note that members that are the same as or correspond to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0046]
As shown in FIG. 7, in the adapter 50, a flange portion 50b is integrally formed on the base end side of the tubular connection portion 50a. The holder 51 includes a holder main body 52 and a cover 53. The holder main body 52 has a curved surface whose inner surface has substantially the same curvature as the outer surface of a packing 54 mounted on the outer peripheral surface of the side wall 11d of the manhole body 11. A long hole 52a extending in the horizontal direction is provided at the center corresponding to the long hole 11f of the manhole body 11. The outer surface of the holder main body 52 has a curved surface concentric with the inner surface, a concave portion 52b is formed in a peripheral portion of the long hole 52a, and a bolt insertion hole 52c is provided at four corners corresponding to the insert nut 17. The bottom surface of the concave portion 52b is a curved surface concentric with the inner surface.
[0047]
The flange portion 50b of the adapter 50 is housed in the concave portion 52b and is rotatable in the circumferential direction. The size of the flange portion 50b is the gap between the long holes 52a communicating with the connecting portion 50a even at the extreme left and right positions of the concave portion 52b. And the thickness thereof is substantially the same as the depth of the concave portion 52b. The cover 53 has substantially the same size as the holder main body 52, and has an inner surface that is a curved surface that contacts the outer surface of the holder main body 52. An elongated hole 53a having substantially the same shape as the elongated hole 52a of the holder main body 52 is formed at the center of the cover 53, and bolt insertion holes 53b are provided at four corners corresponding to the insert nut 17.
[0048]
The packing 54 has substantially the same size as the holder main body 52, a long hole 54 a corresponding to the long hole 11 f of the manhole body 11 is provided at the center, and a bolt insertion hole 54 b is provided at the four corners corresponding to the insert nut 17. I have. The packing 54 is made of, for example, an elastomer or a rubber member.
[0049]
In the adapter 50, the flange portion 50b is housed in the concave portion 52b of the holder main body 52, is held in a sandwich shape by the cover 53, and the connecting portion 50a projects through the long hole 53a of the cover 53. The holder main body 52 is attached to the side wall 11 d of the manhole main body 11 via a packing 54, and is fixed together with the cover 53 by a nut 18 screwed to the insert nut 17.
[0050]
In this state, the flange portion 50b is rotatable in the circumferential direction within the concave portion 52b of the holder main body 52, so that the connection angle in the circumferential direction with respect to the manhole main body 11 can be adjusted without loosening the bolt 18. is there. Thus, the adapter 50 can be attached to the manhole body 11 in advance, and the work efficiency at the site can be improved.
[0051]
Also in this embodiment, since the adapter 50 is attached so as to be rotatable in the circumferential direction of the side wall 11d of the manhole main body 11, even if the circumferential connection angle of the pipe (not shown) is changed, The center of the manhole body 11 is always located on the center line of the tube, and the same effect as in the first embodiment is achieved.
[0057]
【The invention's effect】
According to the connection structure between the skeleton and the pipe material of the present invention,A rotating member which has a convex curved outer surface and is rotatably mounted in a circumferential direction of a side wall of the skeleton and closes a through hole of the skeleton; and a rotation member provided at a base end of a connection portion to which a pipe is connected. And a connecting member having a sliding portion that is vertically slidably mounted along the outer surface of the moving member and that blocks the communication hole.Even when the connection angle between the body and the pipe is variously changed, the center of the manhole is always located on the center line of the pipe, so the mirror and surveillance camera should be used to inspect the inside of the pipe, especially for small-diameter skeletons. It becomes possible.Further, the connection angle of the pipe to the frame can be freely adjusted.
[0059]
Furthermore, an invert is provided at the bottom of the skeleton, and the groove of the invert is inclined downward from the inflow side to the outflow side of the skeleton, and the groove at the end communicating with the through hole provided in the side wall of the skeleton. By forming the width to be equal to the lateral width of the through hole, the flow of sewage or the like becomes smooth, and the flow is not hindered even if the connection angle between the skeleton and the pipe is changed.
[0060]
Further, by providing the adapter on the inflow side of the frame, the flow of sewage or the like becomes smoother.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a connection structure between a body and a pipe according to the present invention.
FIG. 2 is an assembled perspective view of a connection structure between a skeleton and a pipe shown in FIG. 1;
FIG. 3 is an explanatory diagram for adjusting a connection angle of a pipe to a skeleton in the connection structure between a skeleton and a pipe shown in FIG. 1;
FIG. 4 is an exploded perspective view showing a second embodiment of the connection structure between the body and the pipe according to the present invention.
FIG. 5 is an assembled perspective view of a connection structure between a skeleton and a pipe shown in FIG. 4;
FIG. 6 is an exploded perspective view showing a third embodiment of the connection structure between a skeleton and a pipe according to the present invention.
FIG. 7 is an exploded perspective view showing a fourth embodiment of the connection structure between a skeleton and a pipe according to the present invention.
FIG. 8 is an explanatory diagram for adjusting a connection angle of a pipe to a skeleton in a conventional connection structure between a skeleton and a pipe.
[Explanation of symbols]
11Manhole body (frame)
11a Invert
11b groove
11d side wall
11eHole
11f long hole (through hole)
13, 30, 40, 50adapter
13a, 31a, 40a, 50aConnection
13b, 40b, 50b Flange
14 Holding member
24 Outflow pipe (tube material)
25 Inflow pipe (tube material)
31 Connecting member
32 Rotating member
32a communication hole
41, 54 Packing
51 Holder

Claims (3)

In the connection structure for connecting the tubular body and the tubular body having a bottomed cylindrical shape and provided with a through hole provided in the side wall and communicating with the tubular material on the inflow side and the outflow side,
Either one of the through holes is a horizontally long slot that extends along the circumferential direction of the skeleton and is larger than the outer diameter of the tube.
A vertically long communication hole larger than the outer diameter of the tube material communicating with the long hole is provided, the inner surface is substantially the same as the curvature of the outer peripheral surface of the side wall of the skeleton, and the outer surface is a convex shape centered on the center of the skeleton. A rotating member that forms a curved surface and is rotatably mounted in a circumferential direction of a side wall of the skeleton and blocks around the through hole.
A connecting portion to which the pipe material connected to the communication hole is connected, and an inner surface provided at a base end of the connecting portion having a curved surface having substantially the same curvature as an outer surface forming a convex curved surface of the rotating member; A connection member having a sliding portion attached slidably in the vertical direction along with a sliding portion closing around the communication hole,
A connection structure between a frame and a pipe, wherein the pipe is connected to the through hole so that a center of the frame is positioned on a center line of the pipe. The skeleton has an invert at the bottom, and the groove of the invert has a bottom surface inclined downward from the inflow side to the outflow side of the skeleton, and an end on the side communicating with the through hole provided on the side wall of the skeleton. The connection structure according to claim 1, wherein a groove width is formed so as to match a lateral width of the through hole. The connection structure according to claim 1, wherein the adapter is provided on an inflow side of the skeleton.

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