JP5584498B2 - Work area structure of pipe line - Google Patents

Description

  The present invention relates to a work site structure of a pipe line.

  For example, drainage pipes are installed as drainage facilities in detached houses, buildings such as apartments, condominiums, office buildings, commercial buildings, and other various structures. Such a drain pipe mainly includes a horizontal pipe arranged in the same level and a vertical pipe arranged between different levels. And these horizontal piping and vertical piping each comprise a pipe line independently, and comprise the integrated one pipe line by mutually connecting.

  In the middle of such a pipeline, work sites for performing operations such as inspection and cleaning of the pipeline are provided as appropriate. A conventional work site includes one open port portion that can open a pipe line and one lid portion that can open and close the one open port portion (see, for example, Patent Document 1). Here, the opening part is normally formed in the magnitude | size substantially equal to the aperture of a pipe line.

  According to such a configuration, the work site is normally closed by attaching the lid to the opening portion. Thereby, it becomes possible to use a pipe line.

  Moreover, at the time of work such as inspection and cleaning, the work site is opened by removing the lid from the opening. This makes it possible to perform operations such as inspection and cleaning inside the pipe line through the opening.

Japanese Patent No. 4195348

  However, the work site structure of the pipe has the following problems.

  In other words, each work site has conventionally had only one open port having a size substantially equal to the diameter of the pipeline, so that, for example, work when a large-scale abnormality occurs is also regularly inspected. Ordinary work (especially when no major abnormality is observed) such as simple clogging and simple clogging are all performed from the same single opening.

  On the other hand, for example, in the case of buildings such as apartments, condominiums, office buildings, and commercial buildings, there are a large number of residents, so it is not possible to stop draining completely with permission from all residents. It is a heavy burden for both the operator and extremely difficult. Therefore, unless a very abnormal situation occurs, the above operation is performed without stopping the drainage.

  However, when the opening part of the work site is opened without completely stopping drainage, as described above, the opening part has a size almost equal to the diameter of the pipe line. Since it is large with respect to the road, there is a risk that drainage (for example, sewage) that has flowed through the pipe will flow out from the opening. For this reason, the operator must take measures to suppress or prevent the drainage of drainage from the open mouth part or open the open mouth part or perform the work while continuing the countermeasures. Therefore, it is a big burden for the worker. In addition, since the opening is large with respect to the pipeline, it is difficult to completely implement the above-mentioned spill prevention measures. There is a risk that wastewater that has passed through the preventive measures and discharged to the outside will greatly contaminate surrounding facilities.

  In particular, when the work site is provided in a horizontal pipe, the work site is often provided at the end of the horizontal pipe due to the problem of installation space, and a constant amount of drainage is always accumulated in the horizontal pipe. In many cases, when the opening is opened, the possibility that the accumulated waste water flows out from the opening is very high and troublesome.

  In order to solve the above problems, the invention described in claim 1 is provided with a work part for performing work such as inspection and cleaning on the pipe in the middle of the pipe. In the working part structure of a pipe line having an opening part capable of opening a pipe line and a lid part capable of opening and closing the opening part, the work part has a plurality of opening parts having different sizes. , And having a plurality of lids capable of opening and closing each open mouth part separately.

In addition , a small opening part of the plurality of opening parts having different sizes is provided on a lid part that can open and close the large opening part.

The invention described in claim 2 is characterized in that, in the above, the small opening part is provided at the center position of the lid part capable of opening and closing the large opening part .
The invention described in claim 3 is characterized in that, in the above, the small opening part is provided at a position eccentric from a center position of the lid part capable of opening and closing the large opening part .

  According to a fourth aspect of the present invention, there is provided a lid portion capable of opening and closing a large opening portion and a lid portion capable of opening and closing a small opening portion among a plurality of opening portions having different sizes. It has a substantially similar shape.

  According to invention of Claim 1, the following effects can be acquired by the said structure. That is, the work site has a plurality of opening portions having different sizes, and has a plurality of lid portions that can open and close each opening portion separately, so that the sizes differ depending on the purpose of the work. It becomes possible to use a plurality of opening portions having an optimum size among the plurality of opening portions.

Moreover, the basic structure of the work site in the pipe line is not changed by providing a small opening part of the plurality of opening parts of different sizes with respect to the lid part that can open and close the large opening part. It is possible to provide a plurality of opening portions with different sizes.

According to invention of Claim 2 , the following effects can be acquired by the said structure. That is, since the small opening part is provided at the center position of the lid part capable of opening and closing the large opening part, the amount of fluid flowing out to the outside when the small opening part is opened can be reduced. .
According to the invention of claim 3, the following effects can be obtained by the above configuration. That is, the amount of fluid that flows out to the outside when the small opening is opened because the small opening is provided at a position that is eccentric from the center position of the lid that can open and close the large opening. Can be reduced.

  According to invention of Claim 4, the following effects can be acquired by the said structure. That is, among the plurality of open mouth portions of different sizes, the lid portion that can open and close the large open mouth portion and the lid portion that can open and close the small open mouth portion have a substantially similar shape, It is possible to unify the design while making the handling procedures such as attaching and detaching the lids having different sizes the same.

It is a perspective view of a horizontal pipe provided with the work part structure of the pipe line concerning the example of the present invention. It is the perspective view which looked at the vertical pipe provided with the work site | part structure of the pipe line concerning the Example of this invention from the side. It is the perspective view which looked at the vertical pipe of FIG. 2 from the front ((a) fully closed state, (b) the open state of a large opening part, (c) the open state of a small opening part). It is a perspective view of the work site | part structure of a pipe line. FIG. 5 is a plan view of FIG. 4. FIG. 5 is a cross-sectional view of FIG. 4. FIG. 5 is an exploded perspective view of FIG. 4. It is a figure which shows the installation position of a small cover part. It is a figure which shows the positional relationship of the fluid collected in the horizontal tube, and the small opening part ((a) center arrangement | positioning, (b) eccentric arrangement | positioning). It is an operation | movement figure which shows the state of the operation | work with respect to a vertical pipe ((a) center arrangement | positioning, (b) eccentric arrangement | positioning). It is an operation figure which shows the state of opening and closing of a cover part (a big cover part, a small cover part) ((a) top view, (b) side view) It is an operation | movement figure which shows the working state with respect to the big opening part provided in the horizontal pipe ((a) There is no outflow prevention measure, (b) There is an outflow prevention measure). It is an operation | movement figure which shows the working condition with respect to the big opening part provided in the vertical pipe ((a) No outflow prevention measures, (b) Outflow prevention measures). It is an operation | movement figure which shows the working state with respect to the small opening part provided in the horizontal pipe ((a) No outflow prevention measures, (b) Outflow prevention measures). It is an operation | movement figure which shows the working condition with respect to the small opening part provided in the vertical pipe ((a) There is no outflow prevention measure, (b) There is an outflow prevention measure). It is (a) top view and (b) side view which show the 1st modification of this invention. FIG. 17 is an operation diagram of FIG. 16. It is the (a) top view, (b) side view, (c) perspective view which shows the 2nd modification of this invention.

  An object of the present invention is to make it possible to easily perform operations such as inspection and cleaning of a pipeline without stopping the use of the pipeline.

  Hereinafter, embodiments embodying the present invention will be described together with illustrated examples.

  FIGS. 1-18 shows the Example of this invention and its modification.

  <Configuration> First, the configuration will be described.

  For example, drainage pipes are installed as drainage facilities in detached houses, buildings such as apartments, condominiums, office buildings, commercial buildings, and other various structures. Such a drain pipe is mainly composed of a horizontal pipe 1 (also referred to as a horizontal branch pipe or the like, see FIG. 1) arranged in the same level and a vertical pipe 2 (standing pipe) arranged between different levels. 2) (also referred to as a tube or the like). The horizontal pipe 1 and the vertical pipe 2 constitute a pipe line 3 alone and are connected to each other to form a unified pipe line 3. Such an integrated pipe line 3 is, for example, a structure in which a large number of horizontal pipes 1 are connected in a tree shape with respect to a single vertical pipe 2. At this time, the horizontal pipe 1 is provided with a drainage gradient that gently falls toward the vertical pipe 2 as necessary. These pipe lines 3 are formed by connecting resin-made piping members (for example, a PVC pipe or a PVC joint). In addition, a pipe member having a circular cross section is usually used for such a pipe 3, but a pipe member having a cross section other than a circle may be used.

  In the middle of the pipeline 3, a work site 4 for performing operations such as inspection and cleaning on the pipeline 3 is appropriately provided. This work site 4 is generally called a cleaning port, an inspection port, a maintenance port, or the like. As shown in FIG. 3, such a work site 4 has an opening portion 5 that can open the conduit 3 and a lid portion 6 that can open and close the opening portion 5.

  Here, the work site 4 is appropriately set as necessary, for example, at the end of the horizontal pipe 1, the connecting part between the horizontal pipe 1 and the vertical pipe 2, or the middle part of the horizontal pipe 1 or the vertical pipe 2. Provided. In each such work site | part 4, the above-mentioned cover part 6 is installed in vertical arrangement | positioning or horizontal arrangement | positioning.

  More specifically, for example, the above-described work site 4 is installed by using a vacant receiving port 8 of a joint member 7 provided in the middle of the pipeline 3. The joint member 7 includes, for example, two joints (for example, a straight joint (socket) or a bent joint (elbow)) that can connect two pipe members constituting the pipe line 3, and a pipe member. There are three joints that can be connected to each other (for example, a branch joint such as an LT joint (cheese)) and other various kinds. These joint members 7 are made of resin.

  And in order to install the work site | part 4 simply with respect to the receptacle 8 of the coupling member 7, as shown to FIGS. 4-7, the cylindrical member which comprises the opening part 5 in the work site | part 4 is shown. A work site component having 11 (open port component) and a lid 6 (lid member) is used. The cylindrical member 11 and the lid portion 6 are made of resin. In addition, although this work site | part component (especially the cylindrical member 11) is not necessarily required in order to install the work site | part 4, the installation property of the work site | part 4, reliability, durability, etc. are improved. Since it functions effectively above, it is commonly used.

  Among these, as shown mainly in FIG. 6, the above-described cylindrical member 11 has a short cylindrical shape having an outer diameter dimension capable of slidingly fitting into the inside of the open receiving port 8 of the joint member 7 from the outside. Presents. And in this case, the space part formed in the inner periphery of the cylindrical member 11 becomes the above-mentioned opening part 5. The opening 5 has substantially the same size as the inner diameter of the pipe 3. Therefore, the opening portion 5 having the same size as the inner diameter of the pipe line 3 is hereinafter referred to as a normal opening portion 12 in the meaning of the opening portion 5 having a normal size. The cylindrical member 11 has its outer peripheral surface joined to the inner peripheral surface of the receiving port 8 by adhesion or the like. Also, a flange-shaped lid receiving portion 11a that projects outward in a substantially radial direction and can be brought into contact with and locked to the near-side end portion of the receiving port 8 is integrally formed at the near-side end portion of the cylindrical member 11. Is formed. The lid receiving portion 11a is formed in an annular shape or the like having a protruding amount substantially equal to the wall thickness of the receiving port 8 and continuously extending in the circumferential direction.

  Further, the lid portion 6 attached to the above-described normal opening portion 12 is referred to as a normal lid portion 13. And this normal cover part 13 is made into the disk shape which has the outer diameter dimension substantially the same as the outer diameter dimension of the cover receiving part 11a, or a little larger than it, and contact | abuts to the near surface of the lid receiving part 11a. Thus, the lid body 13a that can normally close the opening 12 is provided. And the short cylindrical insertion which has the outer diameter dimension which can be slidably fitted with respect to the internal peripheral surface of the cylindrical member 11 from the outer surface in the surface (back surface) by the side of the normal opening part 12a of the lid body 13a. The cylindrical portion 13b is integrally formed concentrically. In this case, the insertion cylinder portion 13b is approximately half the length of the cylindrical member 11 and the like. Further, an operation portion 13c for opening and closing the normal lid portion 13 is integrally formed on the side surface or the surface of the lid main body 13a. The operation unit 13c will be described later.

  And between the normal opening part 12 and the normal cover part 13, the attachment / detachment part 14 which makes the normal cover part 13 detachable with respect to the normal opening part 12 is provided. The attachment / detachment portion 14 is formed, for example, on the outer peripheral surface of the insertion tube portion 13b of the normal lid portion 13 and the female screw portion formed on the inner peripheral surface of the cylindrical member 11 of the normal opening portion 12. And a male screw portion. The female screw part and the male screw part can be screwed together. The female screw portion and the male screw portion may be either a single thread or a multi-thread. Further, the female screw portion and the male screw portion may be continuous or discontinuous with respect to the circumferential direction. Instead of providing the cylindrical member 11 and the insertion cylinder part 13b, the normal opening part 12 and the normal cover part 13 are provided with a female screw part and a male screw part, and these are screwed directly. It is also possible to construct in a structural manner.

  Further, a seal portion 15 that can seal a fluid when closed is provided between the normal opening portion 12 and the normal lid portion 13. The seal portion 15 includes, for example, a seal member holding portion provided in one of the normal opening portion 12 and the normal lid portion 13, a seal member holding portion provided in the other, a seal member holding portion, and a seal member holding portion. And a sealing member interposed in the part pipe. This seal member holding part literally holds the seal member. Moreover, the seal member accommodating portion literally accommodates the seal member so that the seal member can be brought into a pressure-bonded state between the seal member holding portion and the seal member so as to exhibit sealing performance. For example, an O-ring or packing is used as the seal member. The seal member holding portion is a seat surface capable of holding the seal member, a holding groove, or the like. The seal member accommodating portion is a seal groove or the like that can accommodate an O-ring, packing, or the like in a compressed state. In this case, the seal member is set in advance in a seal member holding portion provided in the corner portion of the normal lid portion 13 between the back surface of the lid main body 13a and the distal end of the insertion tube portion 13b or in the vicinity thereof. Corresponding to this, the seal member accommodating portion is provided at or near the corner portion between the cylindrical member 11 and the lid receiving portion 11a that normally constitute the opening portion 12.

  Further, rotation of the normal lid portion 13 when the normal lid portion 13 is attached to the normal open mouth portion 12 (when closed) between the normal open mouth portion 12 and the normal lid portion 13 as necessary. A stop position defining portion capable of defining the stop position in the direction can be provided. Although this stop position defining portion is not particularly illustrated, for example, the stop position defining portion includes a stop projection provided on one of the normal opening portion 12 and the normal lid portion 13 and a projection receiving portion provided on the other. Is done. The projection receiving portion literally accommodates the stop projection portion, thereby holding the normal lid portion 13 in a stopped state at a specified position, and imparting a sense of moderation and a slight resistance when the normal lid portion 13 is opened and closed. To do. The stopping projection and the projection receiving portion are provided, for example, between the contact surface between the back surface of the lid main body 13a and the lid receiving portion 11a.

  In addition to the basic configuration as described above, the present embodiment has the following configuration.

  (1) The work site 4 has a plurality of opening parts 5 having different sizes. In addition, a plurality of lids 6 that can open and close each open port 5 individually are provided.

  Here, the plurality of opening parts 5 have at least the above-described normal opening part 12 and, in addition, a small opening part 16 smaller than the normal opening part 12. In this case, the small opening 16 has a size that allows a work tool 17 (see FIG. 10) for a cleaning tool or an inspection tool to be inserted with a slight margin.

  Further, the plurality of lids 6 include at least the above-described normal lid 13 attached to the normal open mouth 12 and the small lid 18 attached to the small open mouth 16. .

  In addition, although the above-mentioned two things are optimal for the some opening part 5 from which a magnitude | size differs, it is good also as three or more. Accordingly, three or more lid portions 6 are provided. For example, an intermediate opening portion having an intermediate size between the normal opening portion 12 and the small opening portion 16 may be provided, and an inner lid portion capable of opening and closing the intermediate opening portion may be provided. Alternatively, it is possible to provide a large opening part that is larger than the normal opening part 12, and to provide a large lid part that can open and close the large opening part.

  In the above description, the plurality of opening portions 5 having different sizes can be provided at different positions (separated positions) with respect to each work site 4. However, preferably:

  (2) Lid 6 that can open and close a small open mouth 5 (small open mouth 16) among a plurality of open mouths 5 of different sizes and a large open mouth 5 (normal open mouth 12). Usually, it is provided for the lid portion 13) (multiple lid portion structure).

  Here, in order to install the small opening part 16 inside the normal cover part 13, the normal opening part 13 is formed with a small opening part 21 that can directly or indirectly form the small opening part 16. The The small opening 21 is normally formed so as to penetrate between the front surface and the back surface of the lid portion 13. In this case, the small opening 21 is a circular hole. For the small opening 21, a small opening opening component having a small opening tubular member 22 that can be inserted into and fixed to the small opening 21 and a small lid 18 (small lid member) is used. The small edge tubular member 22 and the small lid member are made of resin. In addition, although this small opening part component (especially cylindrical member 22 for small openings) is not necessarily required in order to install the small opening part 16 etc., the installation property of the small opening part 16 or It is particularly used because it functions effectively in improving reliability and durability.

  Among these, the above-described tubular member 22 for a fore edge has a short cylindrical shape having an outer diameter dimension that can be fitted from the outside to the small opening portion 21 that is normally formed in the lid portion 13. And the space part formed in the inner periphery of this cylindrical member 22 for small ends becomes the above-mentioned small open port part 16. As shown in FIG. Needless to say, the small opening 16 is of a size that can be easily formed with respect to the normal lid 13. The tubular member 22 for fore edge is joined to the inner peripheral surface of the small opening 21 by bonding or the like at least the outer peripheral surface of the front end portion or the vicinity thereof. In addition, the front end of the tubular member 22 for small mouth is a flange-like shape that protrudes almost radially outward and can be brought into contact with and locked to the surface of the normal lid portion 13 (peripheral edge portion of the small opening portion 21). The lid receiving part 22a is integrally formed. The lid receiving portion 22a is formed in an annular shape or the like having a protruding amount substantially equal to or slightly smaller than the lid receiving portion 11a and continuously extending in the circumferential direction.

  In addition, the above-described small lid portion 18 has a disk shape having an outer diameter dimension substantially the same as or slightly larger than the outer diameter dimension of the lid receiving portion 22a, and comes into contact with the lid receiving portion 22a, thereby reducing the small lid portion 18 to a small size. A lid body 18a capable of closing the opening 16 is provided. And the surface (back surface) of the lid body 18a on the side of the normal lid portion 13 is a short cylindrical shape having an outer diameter dimension capable of sliding contact with the inner peripheral surface of the fore edge tubular member 22 from the outside. The insertion tube portion 18b for fore edge is integrally formed concentrically. In this case, the insertion tube portion 18b for fore edge has a length dimension of about 70% to 90% of the insertion tube portion 13b so as not to protrude from the back end portion of the insertion tube portion 13b. Further, an operation portion 18c for opening and closing the small lid portion 18 is integrally formed on the side surface or the surface of the lid main body 18a. The operation unit 18c will be described later.

  And between the small opening part 16 and the small cover part 18, the attachment / detachment part 24 which can attach or detach the small cover part 18 with respect to the small opening part 16 is provided. The detachable portion 24 is formed on, for example, a female screw portion formed on the inner peripheral surface of the small opening tubular member 22 in the small opening port portion 16 and an outer peripheral surface of the small opening insertion tube portion 18b in the small lid portion 18. It is assumed that it has a male screw part formed by engraving. The female screw part and the male screw part can be screwed together. The female screw portion and the male screw portion may be either a single thread or a multi-thread. Further, the female screw portion and the male screw portion may be continuous or discontinuous with respect to the circumferential direction. Instead of providing the small opening tubular member 22 and the small opening insertion cylinder portion 18b, the small opening portion 16 and the small lid portion 18 are provided with a female screw portion and a male screw portion, and these are directly connected. Structurally, it is also possible to configure to be screwed.

  In addition, a seal portion 25 is provided between the small opening 16 and the small lid portion 18 so that the fluid can be sealed when closed. The seal portion 25 includes, for example, a seal member holding portion provided on one of the small opening port portion 16 and the small lid portion 18, a seal member housing portion provided on the other side, a seal member holding portion, and a seal member housing. And a sealing member interposed in the part pipe. This seal member holding part literally holds the seal member. Moreover, the seal member accommodating portion literally accommodates the seal member so that the seal member can be brought into a pressure-bonded state between the seal member holding portion and the seal member so as to exhibit sealing performance. For example, an O-ring or packing is used as the seal member. The seal member holding portion is a seat surface capable of holding the seal member, a holding groove, or the like. The seal member accommodating portion is a seal groove or the like that can accommodate an O-ring, packing, or the like in a compressed state. In this case, the seal member is set in advance in a seal member holding portion provided at or near the corner portion of the small lid portion 18 between the back surface of the lid main body 18a and the tip of the fore edge insertion cylinder portion 18b. Correspondingly, the seal member accommodating portion is provided at or near the corner portion between the small opening tubular member 22 constituting the small opening portion 16 and the lid receiving portion 22a.

  Further, between the small opening part 16 and the small lid part 18, the rotation of the small lid part 18 when the small lid part 18 is attached to the small opening part 16 (when closed) as necessary. A stop position defining portion capable of defining the stop position in the direction can be provided. Although not particularly illustrated, the stop position defining portion includes, for example, a stop projection provided on one of the small opening 16 and the small lid 18 and a projection receiving portion provided on the other. The projection receiving portion literally accommodates the stop projection portion, thereby holding the small lid portion 18 in a stopped state at a specified position and providing a feeling of moderation and a slight resistance when the small lid portion 18 is opened and closed. To do. The stopping projection and the projection receiving portion are provided, for example, between the contact surface between the back surface of the lid main body 18a and the lid receiving portion 22a.

  In the above, the small opening part 5 (small opening part 16) is in an arbitrary position with respect to the cover part 6 (normal opening part 13) that can open and close the large opening part 5 (normal opening part 12). It can be provided in any state. However, preferably:

  (3) As indicated by the solid line in FIG. 8 (see also FIG. 9 (a) and FIG. 10 (a)), the small opening 5 (small opening 16) is replaced by the large opening 5 (normally The opening part 12) is provided at the center position of the lid part 6 (normal lid part 13) that can be opened and closed (center-installed small opening part 16). Alternatively, as shown in phantom lines in FIG. 8 (see also FIG. 9B and FIG. 10B), a position that is more eccentric than the center position of the lid 6 (normal lid 13), more specifically Specifically, the lid portion 6 (normal lid portion 13) is provided at an eccentric position that is above the center position of the lid portion 6 (normal lid portion 13) when the lid portion 6 (normal lid portion 13) is vertically disposed (upper eccentric type). Small opening 16).

  In the above description, the plurality of lid portions 6 having different sizes can each have an arbitrary shape, as will be described later.

  (4) As shown mainly in FIG. 5, a lid 6 (normal lid 13) capable of opening and closing a large open mouth 5 (normally open mouth 12) among a plurality of open mouths 5 having different sizes. ) And the lid portion 6 (small lid portion 18) capable of opening and closing the small opening portion 5 (small opening portion 16) are configured to have a substantially similar shape (similar shape lid portion).

  In this case, the normal lid portion 13 and the small lid portion 18 are configured so that the lid main body 13a and the operation portion 13c, and the lid main body 18a and the operation portion 18c are generally similar in a front view. It should be noted that the similarity between the insertion tube portion 13b and the small opening insertion tube portion 18b and the presence or absence of an opening shape such as the small opening port portion 16 are not questioned here.

  In this embodiment, the operation unit 13c and the operation unit 18c described above are provided on the surfaces of the lid body 13a and the lid body 18a that are circular in front view so as to have substantially similar shapes.

  That is, the operation part 13c and the operation part 18c are the grip parts 31 and 32 that stand up from the surfaces of the lid body 13a and the lid body 18a, respectively. The grip portions 31 and 32 are configured as rib portions formed integrally with the lid main body 13a and the lid main body 18a. Each of the grip portions 31 and 32 has a substantially annular shape installed concentrically with the centers of the lid body 13a and the lid body 18a. The grip portions 31 and 32 are respectively installed at positions inside the outer peripheral edge portions of the lid main body 13a and the lid main body 18a.

  Further, as shown in FIGS. 11A and 11B, an opening / closing tool 33 (in this case, a general tool such as a screwdriver) is provided in the middle of the generally annular gripping portions 31 and 32. Etc.) are provided with a plurality of discontinuous portions 31a, 32a (open / close tool operation portions). Due to the discontinuous portions 31a and 32a, the generally annular gripping portions 31 and 32 are divided into a plurality of partial arc-shaped gripping portions 31 and 32, and the like. The discontinuous portions 31a and 32a are opposed to each other substantially in the diametrical direction so that the opening / closing tool 33 described above can be used substantially in the diametrical direction of the generally annular gripping portions 31 and 32 ( Provided in pairs). In this case, the discontinuous portions 31a and 32a are provided at four locations (two pairs) having a phase of 90 ° in the circumferential direction. However, the discontinuous portions 31a and 32a have two places (a pair) having a phase of 180 ° in the circumferential direction, or six places (three pairs) having a phase of 60 ° in the circumferential direction, or More than that may be provided. The widths of the discontinuous portions 31a and 32a are set to be slightly larger than the diameter of the shaft portion of the opening / closing tool 33 described above. More preferably, the discontinuous portions 31a and 32a described above are configured so that when the normal lid portion 13 and the small lid portion 18 are closed, at least a pair of circumferential positions overlap each other. It is preferable for improving the operability of the operation. Therefore, it is possible to set the discontinuous portions 31a and 32a so as to overlap using the stop position defining portion described above.

  In addition, in order to prevent the hands from being removed from the gripping portions 31 and 32 when the opening / closing operation is directly performed by hand on both ends of the plurality of arc-shaped gripping portions 31 and 32, 32b is provided. In this case, the handle portions 31b and 32b are outwardly bent portions extending outwardly so as to be substantially parallel to the shaft portion of the opening / closing tool 33 inserted substantially in the diameter direction with respect to the discontinuous portions 31a and 32a. Has been. The outward bent portion extends along the surfaces of the lid main body 13a and the lid main body 18a and extends outward so as not to reach the outer periphery of the lid main body 13a and the lid main body 18a. Or you may make it provide the edge part etc. with a larger diameter than the width dimension of the holding part 31 as the handle parts 31b and 32b in the both ends of each of the holding parts 31 and 32 of circular arc shape. The gripping portions 31 and 32 and the handle portions 31b and 32b can be appropriately rounded.

  Furthermore, in order to make it easy to open and close the normal lid portion 13 and the small lid portion 18 individually, a height difference h1 is provided between the upper end of the operation portion 13c and the upper end of the operation portion 18c (see FIG. 11 (b)). In this case, the height difference h1 is about the diameter of the shaft portion of the opening / closing tool 33 described above. The height difference h1 can be adjusted by the thickness of the lid receiving portion 22a.

  <Operation> Next, the operation of this embodiment will be described.

  In normal times, for example, as shown in FIG. 1 or FIG. 3A, the opening 5 (the normal opening 12 and the small opening 16) is covered with the lid 6 (the normal lid 13 and the small lid 18). ) To close the work site 4. Thereby, it becomes possible to use the pipe line 3.

  Further, at the time of work such as inspection and cleaning, as shown in FIGS. 3B and 3C, from the opening 5 (normal opening 12 or small opening 16) to the lid 6 (normal lid 13 or The work site 4 is opened by removing the small lid 18). Accordingly, it is possible to perform operations such as inspection and cleaning inside the pipe line 3 through the opening 5.

  According to this embodiment, the following operational effects can be obtained.

(Operation effect 1)
3 (b) and 3 (c) have a plurality of opening portions 5 having different sizes and a plurality of lid portions 6 that can open and close each opening portion 5 separately. As shown, according to the purpose of the work, it is possible to use a plurality of opening openings 5 having an optimum size among a plurality of opening openings 5 having different sizes. Or it becomes possible to use the some opening part 5 properly according to the objective of work.

  That is, for example, when a large-scale abnormality occurs, work is performed using the large opening portion 5 (normal opening portion 12) as shown in FIG. In addition, when using the large opening part 5 (normal opening part 12), it is desirable to stop the use of the pipe line 3, but such a large-scale abnormality is relatively rare. Therefore, the frequency of stopping the use of the pipe line 3 can be reduced. Therefore, it is not relatively difficult to stop the use of the pipeline 3 and the burden on the user and the operator of the pipeline 3 can be minimized.

  On the other hand, when all the operations are performed using the normal opening 12 as in the prior art, it is difficult to frequently stop the use of the conduit 3, so FIG. 12 (a) and FIG. 13 (a). ), The pipe 3 tends to work without stopping the use, or even if the user is notified of the stop of the use of the pipe 3, the sudden pipe 3 As a result, outflow of fluid (for example, wastewater such as sewage) from the opening 12 usually occurs.

  Alternatively, as shown in FIGS. 12 (b) and 13 (b), measures to prevent the fluid in the conduit 3 from flowing out to the outside of the normally open port portion 12 (measures for preventing leakage such as water leakage curing). ) Or work while taking measures. This outflow prevention measure is usually such that the normal opening 12 is covered with the cloth-like body 35.

  However, this outflow prevention measure is because the normally open opening 12 has a size substantially equal to the diameter of the pipe line 3, so that the opening area for the measure and the amount of fluid flowing out increase. Countermeasures and work itself are difficult, and the burden on the worker is large. Therefore, normal operations such as inspection and cleaning become difficult, and the maintainability of the pipe line 3 is deteriorated. In addition, since the above-described anti-outflow measures for the normal opening 12 are not very effective, contamination of surrounding facilities due to outflow of fluid in normal work is likely to occur. The cleanup will be difficult.

  In the case of this embodiment, it is not necessary to perform all operations using the normal opening 12, so that such a problem is avoided.

  In other words, the pipe 3 is used when performing regular work (especially when there is no major abnormality) such as periodic inspection and simple clogging (for example, simple clogging and ensuring drainage performance). 3 (c), the small opening 5 (small opening) may be used as shown in FIG. 3 (c). 16).

  At this time, as shown in FIGS. 14 (a) and 15 (a), the small opening 5 (small opening 16) is opened, and as shown in FIGS. 14 (b) and 15 (b), Take measures to prevent the fluid in the pipeline 3 from flowing out to the small opening 5 (small opening 16), or continue to take measures While doing the work. This measure for preventing outflow can be achieved by reducing the opening area 5 and the amount of fluid flowing out to the outside by reducing the size of the opening 5, so that the large opening 5 (normally the opening 12). In comparison with the case of taking measures against outflow, the outflow prevention measures and the work itself are much easier and the burden on the operator is less. As a result, operations such as normal inspection and cleaning can be performed more easily and frequently, and the maintainability of the pipeline 3 can be improved. In addition, as described above, measures for preventing outflow with respect to the small opening part 5 (small opening part 16) are possible (even if the cloth-like body 35 covers the same as in the case of the normal opening part 12). Since it can be performed more easily and effectively, it is possible to suppress contamination of surrounding facilities due to outflow of fluid in a normal operation. Alternatively, as shown in FIGS. 14 (a) and 15 (a), even when not taking the above-described anti-outflow measures, it is due to outflow of fluid to the outside as compared with the case of the normal opening portion 12. Contamination of surrounding facilities can be suppressed.

(Operation effect 2)
A lid 6 (normal lid portion) capable of opening and closing a small open mouth portion 5 (small open mouth portion 16) among a plurality of open mouth portions 5 having different sizes, and a large open mouth portion 5 (normally open mouth portion 12). By providing with respect to 13), it becomes possible to provide the some opening part 5 from which a magnitude | size differs, without changing the basic structure of the operation | work site | part 4 in the pipe line 3. FIG. That is, the work site 4 in the pipe line 3 can have a structure in which only one large opening 5 (normal opening 12) remains. That is, the work site 4 can be provided using the receiving port 8 of the existing joint member 7. Further, the lid 6 (normal lid 13) capable of opening and closing the large opening 5 (normal opening 12) with respect to the existing work site 4 of the existing pipeline 3 is replaced with that of this embodiment. Only by doing this, it becomes possible to easily add a small opening 5 (small opening 16).

(Operation effect 3)
The small opening 5 (small opening 16) is small because it is provided at the center of the lid 6 (normal lid 13) that can open and close the large opening 5 (normal opening 12). Since the opening part 5 (small opening part 16) and the large opening part 5 (normal opening part 12) can be arranged concentrically, regardless of the opening part 5 used for work, work The lid 6 (normal lid 13) that can open and close the large opening 5 (normal opening 12) and the small opening 5 (small opening) can be secured. It is possible to simplify the arrangement of the portion 16) with the lid portion 6 (small lid portion 18) that can be opened and closed to facilitate the handling thereof. And the largest small cover part 18 can be provided with respect to the normal cover part 13. FIG.

  Moreover, the center position of the cover part 6 (normal cover part 13) in which the small opening part 5 (small opening part 16) can open and close the large opening part 5 (normal opening part 12), or the cover part 6 The position eccentric from the center position of the (normal lid portion 13), more specifically, the center position of the lid portion 6 (normal lid portion 13) when the lid portion 6 (normal lid portion 13) is arranged vertically. By providing the eccentric position on the upper side, it is possible to reduce the amount of fluid flowing out to the outside when the small opening 5 (small opening 16) is opened. That is, for example, as shown in FIGS. 9 (a) and 9 (b), a work site 4 is provided at an end portion or a middle portion of the horizontal pipe 1 of the pipe line 3 where a constant amount of fluid is always accumulated. The small opening part 5 (small opening part 16) is higher than the center of the lid part 6 (normal opening part 13) that can open and close the large opening part 5 (normal opening part 12). By providing in the position, the small opening part 5 (small opening part 16) can be made higher than the liquid level x of the fluid. Therefore, the fluid that flows out when the large opening 5 (normal opening 12) is opened can be prevented from flowing out when the small opening 5 (small opening 16) is opened.

  In addition, by the above configuration, the small opening 5 (small opening 16) is provided at a higher position, so that, as shown in FIGS. The work tool 17 can be inserted into the pipeline 3 from the opening 16 to the pipe 3 more easily (or at a gentler angle). Alternatively, the higher the position of the small opening 16, the less the bending of the work tool 17 to be inserted downward, and the workability can be improved.

(Operation effect 4)
Of a plurality of opening parts 5 having different sizes, a cover part 6 (normal cover part 13) capable of opening and closing a large opening part 5 (normal opening part 12) and a small opening part 5 (small opening part) Since the lid portion 6 (small lid portion 18) capable of opening and closing the portion 16) has a substantially similar shape, the handling procedures such as attachment and detachment of the lid portion 6 having different sizes are made the same and the design is unified. It becomes possible to do. Moreover, when providing the small opening part 5 (small opening part 16) with respect to the cover part 6 (normal cover part 13) which can open and close the big opening part 5 (normal opening part 12), it is big. Lid 6 (small lid) capable of opening and closing small open mouth 5 (small open mouth 16) with respect to lid 6 (normal lid 13) capable of opening and closing open mouth 5 (normal open mouth 12) The part 18) can be arranged most efficiently.

  For example, in the case of FIG. 11, the normal lid 13 is normally opened and closed by inserting and locking the tip of the shaft part of the opening and closing tool 33 such as a screwdriver to one of the discontinuous parts 31 a. This can be done simply by turning the lid 13 in the circumferential direction as a fulcrum. The small lid portion 18 is opened and closed by inserting the shaft portion of the opening and closing tool 33 such as the same driver as described above between the two discontinuous portions 32a facing each other in the diametrical direction and rotating in the circumferential direction of the small lid portion 18. It can be done easily.

<Modification>
16 and 17 show a first modification of this embodiment. In this modification, the normal lid portion 13 and the small lid portion 18A have a shape other than the similar shape.

  That is, the side of the lid main body 18a of the small lid 18A is made into a square shape having at least a pair of side surfaces (sides) parallel to the outer shape of the lid main body 18a of the small lid 18A while leaving the normal lid 13 as it is. The pair of parallel sides described above is an operation portion 18c that can be opened and closed by an opening and closing tool 33a such as a spanner or a wrench. Here, the grip portion 32 as the operation portion 18c described above may or may not be provided on the surface of the lid main body 18a of the small lid portion 18A. In this case, the lid of the small lid portion 18A is not provided. Since the main body 18a is considerably smaller than the lid main body 18a of the small lid portion 18 of the above-described embodiment, the above-described gripping portion 32 is not provided in terms of space. Further, the outer shape of the lid main body 18a of the small lid portion 18A can be a quadrangle (square, rectangle), an even number of parallel sides (side surfaces) such as a regular hexagon, etc. In this case, It is a rectangle (rectangle). Further, the lid body 18a of the small lid portion 18A is made higher than the tip of the operation portion 13c of the normal lid portion 13 (height difference h2), and the lid body of the small lid portion 18A is opened with the opening / closing tool 33a. The side surface (the operation unit 18c) of 18a can be operated. The height difference h2 described above can be adjusted by the thickness of the lid body 18a of the small lid portion 18A.

  Further, the small lid portion 18 </ b> A may be directly screwed into the small opening 21 of the normal lid portion 13. In this case, the small opening 21 becomes the small opening 16 as it is. That is, the above-described tubular member 22 for small mouth and the insertion tubular portion 18b for small mouth are eliminated, and although not particularly shown, a female screw portion as an attaching / detaching portion 24 is formed on the small opening portion 21 to form a small lid portion 18A. A male screw portion as the attaching / detaching portion 24 is formed in an engraved manner. The small lid portion 18A may be provided with a male screw portion directly on the back side portion of the lid main body 18a, or may be provided with a male screw portion on the back side of the small lid portion 18A so as to be entirely bolt-shaped. In this case, the small lid portion 18A has a bolt shape. Between the small opening 16 and the small lid portion 18A, although not particularly illustrated, a seal portion 25 similar to the above-described embodiment that can seal a fluid when closed can be provided.

  When closing the small opening 16, the small lid 18 </ b> A is directly screwed to the small opening 16 of the normal lid 13.

  On the contrary, when the small opening 16 is opened, the small lid 18A is directly detached from the small opening 16 of the normal lid 13 by turning the small lid 18A in the opposite direction. To.

  At this time, the rotation of the small lid portion 18A directly with respect to the small opening port portion 16 of the normal lid portion 13 causes the opening / closing tool 33a such as a spanner or a wrench to be attached to the side surface (the above-described pair of parallel sides of the small lid portion 18A). (Operation part 18c) is fitted and locked.

  In addition, about a structure other than the above, and an effect, it can be set as the thing similar to an above-described Example.

  FIG. 18 shows a second modification of this embodiment. In this modified example, the normal lid portion 13 and the small lid portion 18B have a shape other than the similar shape as in the first modified example.

  That is, the normal lid portion 13 is left as it is, and the split pin-shaped shaft portion 45 is provided on the back side of the lid body 18a. The shaft portion 45 has an outer peripheral surface that is substantially the same diameter as the inner diameter of the small opening portion 21 of the lid portion 13, and can be inserted into the small opening portion 21. It is supposed that it has been broken into two forks by adopting a shape with. The tip of the bifurcated shaft portion 45 has a locking portion 45 b (locking claw portion) that can be locked to the back surface of the normal lid portion 13 as the detachable portion 24. The locking portion 45 b has a locking surface portion that is normally locked to the back surface of the lid portion 13, and a tapered introduction taper portion that guides insertion into the small opening portion 16.

  Further, a pin hole 45c is formed through the lid body 18a and the portion of the shaft portion 45 where the notch 45a is not inserted, and the pin hole 45c is formed between the pin hole 45c and the notch 45a. The center pin 46 (or lock pin) can be inserted.

  When the center pin 46 is not inserted into the pin hole 45c, the bifurcated shaft portion 45 is close to each other so that the locking portion 45b passes through the small opening 21 and is not locked to the back surface of the normal lid portion 13. When the center pin 46 is inserted into the pin hole 45c, the center pin 46 is pushed away from each other (opens in the radial direction), and the locking portion 45b is normally locked to the back surface of the lid portion 13 and the shaft portion. The outer surface of 45 is configured to be in close contact with the inner peripheral surface of the small opening 21. The pin hole 45c of the small lid portion 18B is formed with a head receiving hole 45d that can be accommodated in a state in which a part of the head 46a whose diameter of the center pin 46 is enlarged is protruded. Note that the amount of protrusion of the head 46a of the center pin 46 is such that it can be gripped by an opening / closing tool 33 (not shown) such as a hand or pliers. The shape of the head 46a of the center pin 46 can be a columnar shape, a prismatic shape, or the like.

  In this case, since the lid main body 18a of the small lid portion 18B is considerably smaller than the lid main body 18a of the small lid portion 18 of the above-described embodiment, the space is larger than the surface of the lid main body 18a of the small lid portion 18B. The grip portion 32 as the operation portion 18c is not provided. Further, the outer shape of the lid body 18a of the small lid portion 18B can be arbitrary. In this case, the lid body 18a of the small lid portion 18B has a cylindrical shape having a diameter larger than that of the small opening portion 21, but may be a prismatic shape or the like. Further, the lid body 18a of the small lid portion 18B is made higher than the tip of the operation portion 13c of the normal lid portion 13 (height difference h3), and an opening / closing tool 33 (not shown) such as a hand or pliers is used. It is designed to make it easier to grip. The height difference h3 can be adjusted by the thickness of the lid body 18a of the small lid portion 18B.

  Further, the above-described tubular member 22 for small mouth and the insertion tube portion 18b for small mouth are eliminated, and the shaft portion 45 of the small lid portion 18B is directly inserted into the small opening portion 21. In this case, the small opening 21 becomes the small opening 16 as it is. Between the small opening 16 and the small lid portion 18B, although not particularly illustrated, a seal portion 25 similar to the above-described embodiment that can seal a fluid when closed can be provided. Further, a similar seal portion may be provided between the center pin 46 and the pin hole 45c.

  And when closing the small opening part 16, the bifurcated shaft part 45 of the state which mutually adjoined is inserted in the small opening part 16, and the center pin 46 is further inserted in the pin hole 45c. As a result, the bifurcated shaft portion 45 is pushed by the center pin 46 and separated from each other (opens in the radial direction), the locking portion 45b is normally locked to the back surface of the lid portion 13, and the outer surface of the shaft portion 45 is The small opening part 16 is in close contact with the inner peripheral surface.

  On the contrary, when the small opening 16 is opened, first, the center pin 46 is pulled out from the pin hole 45c. Then, the bifurcated shaft portion 45 is in a state of being close to each other so that the locking portion 45b passes through the small opening port portion 16 and is not locked to the back surface of the normal lid portion 13. The shaft portion 45 is pulled out.

  In addition, about a structure other than the above, and an effect, it can be set as the thing similar to an above-described Example.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

  The present invention is mainly used for drainage pipes (mainly low-pressure drainage pipes) in detached houses, buildings such as apartments, condominiums, office buildings, commercial buildings, and other various structures. . However, the structure of the present invention can be expected to be widely used for water supply pipes and other various pipe lines 3 other than the above-described drain pipes, and besides drain pipes.

3 Pipeline 4 Work site 5 Opening port 6 Lid 7 Joint member 8 Receiving port 12 Normal open port 13 Normal lid 16 Small open port 18 Small lid 18A Small lid 18B Small lid 31 Gripping part 32 Gripping Part

Claims (4)

In the middle of the pipeline, there is a work site for performing work such as inspection and cleaning on the pipeline, and the work site opens and closes the open port that can open the pipeline. In the work site structure of the pipeline with a possible lid,
The work site has a plurality of opening portions with different sizes, and has a plurality of lid portions that can open and close each opening portion separately ,
A working part structure of a pipe, wherein a small opening part among a plurality of opening parts having different sizes is provided with respect to a lid part capable of opening and closing a large opening part . 2. The pipe work site structure according to claim 1, wherein the small opening portion is provided at a central position of a lid portion capable of opening and closing the large opening portion . Work site structure of the small mouth opening portion, a large open mouth than the center position of the openable lid portion, characterized in that provided in the eccentric position claim 1, wherein the pipe.   Of the plurality of open mouth portions having different sizes, the lid portion capable of opening and closing the large open mouth portion and the lid portion capable of opening and closing the small open mouth portion have substantially similar shapes. The work site structure of a pipe line according to any one of claims 1 to 3.

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