Method and structure for detecting the internal state quantity of a manifold joint member

Abstract

To obtain a method and structure for detecting internal state quantities of a manifold joint member that can detect state quantities within the manifold joint member. [Solution] The method for detecting the internal state quantity of the manifold joint member 25 is as follows: The manifold joint member 25 has an upper riser pipe connection part 26, a lower riser pipe connection part 36, and one or more horizontal pipe connection parts 28. A connecting member 20 having a hole 105 and connected to the horizontal pipe connection part 28 is provided, and internal state quantity detection means 111, 131 for detecting the state quantity inside the manifold joint member 25 is passed through the hole 105, and the internal state quantity detection means 111, 131 detect the state quantity inside the manifold joint member 25.

Description

Technical Field

[0001] The present invention relates to a method for detecting an internal state quantity of an assembly joint member and an internal state quantity detection structure.

Background Art

[0002] As a method for measuring the drainage sound of a drainage system, a soundproof room is prepared in which an assembly joint is provided between the ceiling and the floor, and a drainage riser is connected therebetween, and the measurement is performed with a noise meter (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The conventional drainage sound measurement method described in Patent Document 1 above is a method for evaluating the entire drainage sound of a drainage system, and it has not been possible to investigate in detail the state quantities such as noise vibration of the assembly joint member.

[0005] The present invention has been made to solve such problems, and an object thereof is to obtain a method for detecting an internal state quantity of an assembly joint member and an internal state quantity detection structure capable of detecting the state quantity inside the assembly joint member.

Means for Solving the Problems

[0006] The present invention has the following aspects. (1) One embodiment of the method for detecting the internal state quantity of a manifold joint member according to the present invention is to provide a connecting member having a hole and connected to the horizontal pipe connection portion to a manifold joint member having an upper riser pipe connection portion, a lower riser pipe connection portion and one or more horizontal pipe connection portions, and to detect the state quantity of the manifold joint member by passing an internal state quantity detection means for detecting the state quantity of the manifold joint member through the hole.

[0007] The above-described method for detecting the internal state quantity of a manifold joint member allows for accurate detection of the internal state quantity within the manifold joint member when drainage is flowing from the upper riser pipe connection to the lower riser pipe connection, by passing the internal state quantity detection means through the hole of the connecting member connected to the horizontal pipe connection of the manifold joint member. Moreover, because the internal state quantity detection means is passed through the hole of the connecting member connected to the horizontal pipe connection of the manifold joint member, the internal state quantity within the manifold joint member can be easily detected.

[0008] (2) In the embodiment of (1) above, the internal state quantity detection means may be a vibration noise detection means for detecting vibration noise.

[0009] In this case, vibration noise, which is a state quantity within the manifold joint member when drainage flows from the upper riser pipe connection to the lower riser pipe connection, can be accurately and easily detected by the vibration noise detection means, which is an internal state quantity detection means.

[0010] (3) In the embodiment of (2) above, the vibration noise detection means may include an acceleration sensor and wiring for the acceleration sensor connected to the acceleration sensor, and the wiring for the acceleration sensor may be passed through the hole and the acceleration sensor may be attached to the back surface of the swivel vane of the manifold joint member.

[0011] In this case, vibrations as a state quantity within the manifold joint member when drainage flows from the upper riser pipe connection to the lower riser pipe connection can be accurately and easily detected by the acceleration sensor included in the vibration noise detection means, which is an internal state quantity detection means. Moreover, since the acceleration sensor is attached to the back surface of the swivel vane of the manifold joint member, the amount of drainage applied to the acceleration sensor can be suppressed.

[0012] (4) In the embodiment of (2) or (3) above, the hole may be provided on the upper part of the connecting member, the vibration noise detection means may include a microphone and microphone wiring connected to the microphone, the microphone wiring may be passed through the hole, and the microphone may be suspended inside the connecting member.

[0013] In this case, the noise, which is a state quantity within the manifold joint member when drainage flows from the upper riser pipe connection to the lower riser pipe connection, can be accurately and easily detected by a microphone included in the vibration noise detection means, which is an internal state quantity detection means. Moreover, since the hole is provided in the upper part of the connecting member and the microphone is suspended inside the connecting member by passing the microphone wiring through the hole, the microphone can be suspended in the space inside the connecting member, and even if drainage enters the connecting member, the impact on the microphone can be suppressed.

[0014] (5) One embodiment of the internal state quantity detection structure for a manifold joint member according to the present invention comprises a manifold joint member having an upper riser joint, a lower riser joint, and one or more horizontal pipe joints; an internal state quantity detection means for detecting a state quantity within the manifold joint member; and a connecting member having a hole through which the internal state quantity detection means passes and connected to the horizontal pipe joint.

[0015] The above-described embodiment of the internal state quantity detection structure for the manifold joint member allows for accurate detection of the internal state quantity within the manifold joint member when drainage is flowing from the upper riser pipe connection to the lower riser pipe connection, by passing the internal state quantity detection means through the hole in the connecting member connected to the horizontal pipe connection of the manifold joint member. Moreover, because the internal state quantity detection means is passed through the hole in the connecting member connected to the horizontal pipe connection of the manifold joint member, the internal state quantity within the manifold joint member can be easily detected.

[0016] (6) In the embodiment of (5) above, the internal state quantity detection means may be a vibration noise detection means for detecting vibration noise.

[0017] With this structure, vibration noise, which is a state quantity within the manifold joint member when drainage flows from the upper riser pipe connection to the lower riser pipe connection, can be accurately and easily detected by the vibration noise detection means, which is an internal state quantity detection means.

[0018] (7) In the embodiment of (6) above, the vibration noise detection means may also be configured such that the acceleration sensor includes an acceleration sensor and an acceleration sensor wiring connected to the acceleration sensor, the acceleration sensor wiring is passed through the hole, and the acceleration sensor is attached to the back surface of the swivel vane of the manifold joint member.

[0019] With this structure, vibrations as a state quantity within the manifold joint member when drainage flows from the upper riser connection to the lower riser connection can be accurately and easily detected by the acceleration sensor included in the vibration noise detection means, which is an internal state quantity detection means. Moreover, since the acceleration sensor is attached to the back surface of the swivel vane of the manifold joint member, the amount of drainage applied to the acceleration sensor can be suppressed.

[0020] (8) In the aspect of (6) or (7) above, the hole portion is provided in the upper part of the connection member, the vibration and noise detection means includes a microphone and a microphone wiring connected to the microphone, the microphone wiring is passed through the hole portion, and the microphone is suspended inside the connection member. This configuration may also be used.

[0021] With this structure, as the state quantity in the collective joint member when draining water from the upper riser connection part to the lower riser connection part, the noise can be accurately and easily detected by the microphone included in the vibration and noise detection means which is the internal state quantity detection means. Moreover, since the hole portion is provided in the upper part of the connection member and the microphone is suspended inside the connection member through the microphone wiring in the hole portion, the microphone can be floated in the space inside the connection member, and even if drain water infiltrates into the connection member, the influence on the microphone can be suppressed.

Advantages of the Invention

[0022] In the method and structure for detecting the internal state quantity of the collective joint member of the present invention, the state quantity inside the collective joint member can be detected.

Brief Description of the Drawings

[0023] [Figure 1] It is a cross-sectional view seen from the front of the structure for detecting the internal state quantity of the collective joint member according to the first embodiment of the present invention. [Figure 2] It is a cross-sectional view seen from the perspective of the upper connection pipe of the collective joint member. [Figure 3] It is a cross-sectional view seen from the front of the upper connection pipe. [Figure 4] It is a cross-sectional view seen from the front of the collective joint provided with reinforcing ribs on the swivel blades. [Figure 5] It is a view seen in the direction of arrow A in FIG. 4. [Figure 6] It is a bottom view showing a modification of the arrangement of the reinforcing ribs. [Figure 7] It is a cross-sectional view showing an example of the shape of the reinforcing rib. [Figure 8] This is a cross-sectional view illustrating the manufacturing method of the upper connecting pipe. [Figure 9] This is a characteristic diagram showing an example of data measured by the internal state quantity detection method for the manifold joint member of the first embodiment of the present invention. [Figure 10] This is a front view cross-sectional view of a modified example of the internal state quantity detection structure for a manifold joint member. [Figure 11] This is a front view cross-sectional view of an internal state quantity detection structure for a manifold joint member according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0024] [First Embodiment] Hereinafter, a method and structure for detecting the internal state quantity of a manifold joint member according to the first embodiment of the present invention will be described with reference to Figures 1 to 8. As shown in Figure 1, the internal state quantity detection structure 1 of the manifold joint member 25 according to the first embodiment comprises an upper riser pipe 10 extending in the vertical direction, a lower riser pipe 15 extending in the vertical direction, a connecting member 20, and a manifold joint member 25. In Figure 1, the upper riser pipe 10 and the lower riser pipe 15 are shown by dashed lines. The upper riser pipe 10, the lower riser pipe 15, and the manifold joint member 25 constitute a single-pipe drainage system. The upper riser pipe 10 and the lower riser pipe 15 are formed in a tubular shape from synthetic resin such as polyvinyl chloride resin. The connecting member 20 is formed in a bottomed cylindrical shape from synthetic resin such as polyvinyl chloride resin. The upper riser 10 and the lower riser 15 extend vertically. The upper riser 10 is positioned above the lower riser 15. The upper end of the upper riser pipe 10 is connected to the lower end of the manifold joint member 25 on the upper floor. The lower end of the lower riser pipe 15 is connected to the upper end of the manifold joint member 25 on the lower floor or to a leg joint (not shown). The joint member 25 will be installed in a through-hole H provided in the floor slab S of the upper floor, which separates the upper and lower floors.

[0025] As shown in Figures 1 to 3, the manifold joint member 25 has an upper riser pipe connection 26, a lower riser pipe connection 36, a riser pipe connection 46, and an intermediate member 61. In Figure 2, different hatching is applied to each of the cores 81, 82, and 83 formed on the inner surfaces 27b1, 27b2, 27b3, and 27b4, which will be described later. Here, the upper riser pipe connection section 26, the lower riser pipe connection section 36, and the intermediate member 61 are formed in a tubular shape, while the riser pipe connection section 46 is formed in a cylindrical shape. The central axes of the upper riser pipe connection section 26, the lower riser pipe connection section 36, the riser pipe connection section 46, and the intermediate member 61 are arranged coaxially with the common axis. Hereinafter, the common axis will be referred to as the first axis O1. The direction along the first axis O1 will be referred to as the first axis O1 direction. The direction perpendicular to the first axis O1 will be referred to as the radial direction, and the direction that circles around the first axis O1 will be referred to as the circumferential direction.

[0026] As shown in Figures 1 to 3, the upper vertical pipe connection section 26 includes an upper joint body 27, a horizontal pipe connection section 28, a locking section 29, a first swivel vane 30 (swivel vane), and vertical ribs 31 and 32. The upper joint body 27 is formed in a cylindrical shape. The upper joint body 27 is positioned on the first axis O1. The outer surface 27a of the upper riser pipe connection 26 is curved around the first axis O1. The horizontal pipe connection portion 28 is formed in a cylindrical shape. The horizontal pipe connection portion 28 is provided on the outer circumferential surface 27a of the intermediate portion in the direction of the first axis O1 of the upper joint body 27 (joint body 51, which will be described later). The space inside the horizontal pipe connection portion 28 and the space inside the upper joint body 27 are in communication with each other.

[0027] The locking portion 29 is formed in an annular shape and is provided on the inner circumferential surface 27b of the intermediate portion in the direction of the first axis O1 of the upper joint body 27. The locking portion 29 is positioned below the opening 28a of the horizontal pipe connection portion 28. The locking portion 29 protrudes radially inward from the inner circumferential surface 27b of the upper joint body 27. The locking portion 29 is formed around the entire circumference of the upper joint body 27. The radially inward-facing surface 29a of the locking portion 29 is inclined to gradually approach the first axis O1 as it extends from top to bottom. The lower part of the upper riser pipe connection 26, located below the locking portion 29, is a socket into which an intermediate pipe (not shown) is inserted. If the connection portion 38 of the lower riser pipe connection 36 is a socket, the connection portion 38 of the lower riser pipe connection 36 may be inserted into the lower socket of the upper riser pipe connection 26.

[0028] The first swivel blade 30 is formed in a curved, flat plate shape. The first swivel blade 30 is provided on the inner circumferential surface 27b of the upper joint body 27. The first rotating blade 30 is positioned over the entire range of the opening 28a of the horizontal pipe connection 28 in the direction of the first axis O1. The opening 28a referred to here means the opening at the radially inner end of the horizontal pipe connection 28. The first swivel blade 30 is positioned such that at least a portion of it overlaps the opening 28a of the horizontal pipe connection 28 in the direction of the first axis O1. The first swivel blade 30 has an upward-facing surface 30a and a downward-facing back surface 30b. The surface 30a of the first swivel blade 30 is inclined to gradually go downward as it approaches the first side D1 in the circumferential direction (hereinafter simply referred to as the first side D1). In this example, the surface 30a (the extended surface of the surface 30a) is perpendicular to the first axis O1.

[0029] The first swirling vane 30 guides and swirls the wastewater as it flows from the upper riser pipe 10 to the lower riser pipe 15 within the manifold joint member 25, primarily using the upward-facing surface 30a of the first swirling vane 30. By swirling the wastewater, the first swirling vane 30 guides it in a way that prevents it from flowing towards the horizontal pipe connection 28. As wastewater flows from the upper riser pipe 10 to the lower riser pipe 15, the amount of water that contacts the downward-facing back surface 30b of the first swirling vane 30 is significantly less than the amount of water that contacts the upward-facing surface 30a of the first swirling vane 30.

[0030] As shown in Figure 4, it is preferable that the first swivel blade 30 has protrusions or plate-shaped reinforcing ribs 41 on its back surface 30b to suppress vibration of the first swivel blade 30. In particular, it is preferable that the reinforcing ribs 41 are provided so as to connect the back surface 30b of the first swivel blade 30 and the second inner surface 27b2 of the upper joint body 27, and it is preferable that the first swivel blade 30, the reinforcing ribs 41 and the upper joint body 27 are integrally constructed. If the reinforcing ribs 41 are flat plate-shaped, it is preferable that the plane of the reinforcing ribs 41 be in a direction parallel to the first axis O1 or parallel to the pipe axis of the horizontal pipe connection part 28, and the reinforcing ribs 41 may be composed of a plane parallel to the first axis O1 and a plane parallel to the pipe axis of the horizontal pipe connection part 28.

[0031] As shown in Figure 4, when the plane of the reinforcing rib 41 is provided in a direction parallel to the first axis O1, it is preferable that the reinforcing rib 41 has a draft angle by decreasing its thickness as it goes downwards. When the reinforcing rib 41 is plate-shaped, it is preferable that the reinforcing rib 41 is provided perpendicular to the pipe axis of the horizontal pipe connection 28 (see Figure 5) or inclined toward the direction of the first axis O1 (see Figure 6). The number of reinforcing ribs 41 is not particularly limited and may be one or multiple. When multiple reinforcing ribs 41 are provided on the first swivel vane 30, it is preferable that the multiple reinforcing ribs 41 are parallel to each other. For this reason, as shown in Figure 6, when the reinforcing rib 41 is inclined toward the direction of the first axis O1, it is preferable that the inclination angle of each reinforcing rib 41 is the same, and it is not necessary for all reinforcing ribs 41 to be strictly oriented toward the direction of the first axis O1.

[0032] The shape of the reinforcing rib 41 is not particularly limited, as long as it does not obstruct the inflow of drainage from the horizontal pipe connection 28. The shape of the reinforcing rib 41 may be, for example, a triangle as shown in Figure 7(a), a rectangle as shown in Figure 7(b), or a shape with a notch in part as shown in Figure 7(c).

[0033] The reinforcing rib 41 does not necessarily have to be provided.

[0034] The vertical ribs 31 and 32 are provided on the inner circumferential surface 27b of the upper joint body 27. The vertical ribs 31 and 32 each protrude radially inward from the inner circumferential surface 27b of the upper joint body 27 and extend along the vertical direction. The upper ends of the vertical ribs 31 and 32 are positioned within the range of the opening 28a of the horizontal pipe connection portion 28 in the direction of the first axis O1. The lower end of the longitudinal rib 31 is positioned at the same location as the lower end of the locking portion 29 in the direction of the first axis O1. The lower end of the longitudinal rib 32 extends downward from the locking portion 29. The longitudinal ribs 31 and 32 are arranged with gaps between them in the circumferential direction.

[0035] As shown in Figures 2 and 3, the inner circumferential surface 27b of the upper joint body 27 (joint body 51, which will be described later) has a first inner surface 27b1, a second inner surface 27b2, a third inner surface 27b3, and a fourth inner surface 27b4. The first inner surface 27b1 is inclined so as it extends from top to bottom, it gradually approaches the first axis O1. The first inner surface 27b1 is formed in a position that does not overlap with the first swivel blade 30 in the circumferential direction, and above the first swivel blade 30. The second inner surface 27b2 is positioned below the first rotating blade 30. In this example, the second inner surface 27b2 is parallel to the first axis O1 (see Figure 3). The third inner surface 27b3 is inclined so as it approaches the horizontal pipe connection 28, it gradually moves away from the second axis O2 of the horizontal pipe connection 28. The fourth inner surface 27b4 is formed to be continuous with the first inner surface 27b1 and the second inner surface 27b2, respectively. The fourth inner surface 27b4 is inclined so as it extends from bottom to top, it gradually moves radially outward (away from the first axis O1). The fourth inner surface 27b4 may also be parallel to the first axis O1.

[0036] The upper joint body 27, horizontal pipe connection section 28, locking section 29, first swivel vane 30, and vertical ribs 31, 32 of the upper vertical pipe connection section 26 are integrally constructed from a synthetic resin such as polyvinyl chloride resin by injection molding. In other words, the first swivel vane 30 is integrally formed in the upper riser pipe connection section 26.

[0037] As shown in Figure 1, the lower riser pipe connection section 36 includes a lower joint body 37, a connection section 38, a second swivel vane 39, and a vertical pipe connection section 40. The upper joint body 27, the lower joint body 37, and the connecting portion 38 constitute the joint body 51. The first axis O1 is also the axis of the joint body 51. The upper joint body 27 of the upper riser connection portion 26 is the portion of the joint body 51 on which at least the first swivel vane 30 is provided.

[0038] The lower joint body 37, the connecting part 38, and the vertical pipe connecting part 40 are each formed in a cylindrical shape and are arranged coaxially with the first axis O1. The inner and outer diameters of the lower joint body 37 gradually decrease as you move from top to bottom. The connecting portion 38 is fixed to the outer circumferential surface of the upper end of the lower joint body 37. The connecting portion 38 protrudes upward from the lower joint body 37. The second swivel blade 39 is formed in a curved, flat plate shape. The second swivel blade 39 is provided on the inner circumferential surface of the lower joint body 37. The upper surface 39a of the second swivel blade 39 is inclined to gradually go from top to bottom as it approaches the first side D1. The vertical pipe connection portion 40 is fixed to the outer circumferential surface of the lower end of the lower joint body 37. The vertical pipe connection portion 40 protrudes downward from the lower joint body 37.

[0039] The lower joint body 37, connection part 38, second swivel vane 39, and vertical pipe connection part 40 of the lower riser pipe connection part 36 are integrally constructed from a synthetic resin such as polyvinyl chloride resin by injection molding. The second swivel vane 39 may be injection molded separately and installed inside the lower riser pipe connection 36 by bonding or fitting it to the lower riser pipe connection 36, or the entire upper riser pipe connection 26 and lower riser pipe connection 36 may be integrally formed by injection molding. The upper end of the connection portion 38 of the lower riser pipe connection portion 36 is fixed to the lower end of the upper joint body 27 of the upper riser pipe connection portion 26 with adhesive or the like. The joint body 51, configured as described above, is positioned so that the first axis O1 is aligned in the vertical direction. Furthermore, a sound-insulating cover may be wrapped around the radially outer side of the lower riser pipe connection section 36.

[0040] The vertical pipe connection section 46 includes a main body 47, a locking section 48, and a sealing member (not shown). The main body 47 is formed in a cylindrical shape and is positioned on the first axis O1. The lower part of the main body 47 is fitted into the upper joint body 27 of the upper riser connection part 26. The locking portion 48 is formed in an annular shape and is fixed to the lower end of the main body 47. The locking portion 48 protrudes radially inward from the lower end of the main body 47. The sealing member is a gasket or the like. The sealing member is located radially inward of the main body 47. Furthermore, the riser pipe connection 46 does not necessarily have a sealing member. Swivel vanes are not formed on the riser pipe connection 46.

[0041] The lower end of the upper riser pipe 10 is positioned inside the main body 47 of the riser pipe connection section 46 and is connected to the riser pipe connection section 46 by being locked to the locking portion 48 from above the locking portion 48. The sealing member provides a watertight seal between the main body 47 and the upper riser pipe 10. The upper end of the lower riser pipe 15 is positioned within the vertical pipe connection section 40 of the lower riser pipe connection section 36 and connected to the vertical pipe connection section 40.

[0042] The manifold 65 consists of a manifold 46 connected to an upper riser 10 extending from the upper floor, and an upper riser connection 26 having an upper joint body 27 and a horizontal pipe connection 28.

[0043] The intermediate member 61 is positioned between the manifold 65 and the lower riser pipe connection 36. The intermediate member 61 is fitted to the downstream portion 66 of the manifold below the locking portion 29 of the upper joint body 27 of the upper riser pipe connection 26 that constitutes the manifold 65, and to the connection portion 38 of the lower riser pipe connection 36. The inner diameter of the downstream portion 66 of the upper riser pipe connection 26 and the inner diameter of the connection portion 38 of the lower riser pipe connection 36 are the same. The radially inner side of the intermediate member 61 constitutes a drainage channel through which wastewater flows in the manifold joint member 25. The radially inner portion of the intermediate member 61 is a channel forming portion 62 that forms the drainage channel.

[0044] The intermediate member 61 is cylindrical with a constant inner diameter and a constant outer diameter. The intermediate member 61 is positioned across the downstream portion 66 of the manifold 65 and the connection portion 38 of the lower riser connection portion 36, with the entire axial direction on the inner circumference forming the flow path forming portion 62. The upper part of the flow path forming portion 62 overlaps vertically with the downstream portion 66 of the manifold 65, and the lower part, which is directly below the manifold 65, overlaps vertically with the connection portion 38 of the lower riser connection portion 36.

[0045] The intermediate member 61 is one of the following: a three-layer structure in which a thermoplastic resin layer is formed on the inner and outer circumferential surfaces of a refractory layer containing thermoplastic resin and thermally expandable graphite; a two-layer structure in which a thermoplastic resin layer is formed on the inner or outer circumferential surface of a refractory layer containing thermoplastic resin and thermally expandable graphite; or a single-layer structure consisting of a refractory layer containing thermoplastic resin and thermally expandable graphite.

[0046] The intermediate member 61 is formed by extrusion molding in all three-layer, two-layer, and single-layer structures. In the case of a single-layer structure, it can also be formed by injection molding. When formed by injection molding, it is possible to integrally mold a flow-rectifying vane on the inside. The flow-rectifying vane may be formed separately and bonded to the intermediate member 61.

[0047] Here, the refractory layer contains, for example, a thermoplastic resin and flaky, heat-expandable graphite. Preferably, it contains 100 parts by mass of thermoplastic resin and 3 to 20 parts by mass of flaky, heat-expandable graphite. The thermoplastic resin and thermoplastic resin layer of the refractory layer are, for example, polyvinyl chloride resin.

[0048] The intermediate member 61 may be bonded with adhesive to the inner surface of the downstream portion 66 of the upper joint body 27 of the upper riser pipe connection 26 and to the inner surface of the connection portion 38 of the lower riser pipe connection 36. When the intermediate member 61 is bonded to the upper riser pipe connection 26 and the lower riser pipe connection 36 with adhesive, it is not necessary to fix the upper end of the connection portion 38 of the lower riser pipe connection 36 and the lower end of the upper joint body 27 of the upper riser pipe connection 26 with adhesive. Furthermore, when the intermediate member 61 has a two-layer structure consisting of a refractory layer containing thermoplastic resin and thermally expandable graphite and a thermoplastic resin layer, it is preferable to make the outer surface to which the adhesive is applied the thermoplastic resin layer.

[0049] The manifold joint member 25 is installed in a through-hole H provided in the building's floor slab S. At this time, the downstream part 66 of the upper riser connection 26 and the connection 38 of the lower riser connection 36 are aligned vertically with the floor slab S. Thus, the intermediate member 61 of the manifold joint member 25 is aligned vertically with the floor slab S. The axial length of the intermediate member 61 may be less than the thickness of the floor slab S or greater than or equal to the thickness of the floor slab S. If the axial length of the intermediate member 61 is less than the thickness of the floor slab S, it is preferable that the entire axial length aligns vertically with the floor slab S. If the axial length of the intermediate member 61 is greater than or equal to the thickness of the floor slab S, it is preferable that the vertical position aligns with the entire floor slab S. The gap between the through-hole H in the floor slab S and the manifold joint member 25 is filled with mortar M.

[0050] Next, a method for manufacturing the upper riser pipe connection portion 26 of the manifold joint member 25 configured as described above will be explained. The upper riser pipe connection portion 26 is manufactured by injection molding. As shown in Figure 8, the upper riser connection section 26 is manufactured by a mold 80 that includes a first core 81, a second core 82, a third core 83, and a cavity (not shown). The first core 81 forms the first inner surface 27b1, the fourth inner surface 27b4 of the upper riser connection 26, the surface 30a of the first swivel vane 30, etc., and is pulled out upward relative to the upper riser connection 26. The second core 82 forms the second inner surface 27b2 of the upper riser pipe connection 26, the lower end of the back surface 30b of the first swivel vane 30, etc., and is pulled out downward relative to the upper riser pipe connection 26. The third core 83 forms the third inner surface 27b3 of the upper riser pipe connection 26, the upper end of the back surface 30b of the first swivel vane 30, etc., and is pulled out radially outward from the upper riser pipe connection 26.

[0051] The back surface 30b of the first rotating blade 30 may be formed solely by the second core 82. Furthermore, if reinforcing ribs are provided on the lower surface of the first swivel blade 30 to suppress vibration of the first swivel blade 30, the reinforcing ribs are formed by a second core 82 or a third core 83. If the reinforcing ribs are formed in a plane parallel to the first axis O1, they are formed together with the lower surface of the first swivel blade 30 by the second core 82. If the reinforcing ribs are formed in a plane parallel to the pipe axis of the horizontal pipe connection 28, they are formed together with the lower surface of the first swivel blade 30 by the third core 83. The reinforcing ribs may also be formed by two cores, the second core 82 and the third core 83.

[0052] Furthermore, as shown in Figure 4, when the plane of the reinforcing rib 41 is positioned parallel to the first axis O1, it is preferable that the reinforcing rib 41 is formed by the second core 82.

[0053] Molten synthetic resin is poured between the cavity and the cores 81, 82, and 83, and the mold 80 is cooled to solidify the molten synthetic resin. The cores 81, 82, and 83 are withdrawn from the cavity, and the cavity is divided as appropriate to produce the upper riser connection section 26.

[0054] As shown in Figure 1, the connecting member 20 has a cylindrical portion 101 and a lid portion 102. The cylindrical portion 101 is cylindrical, and the lid portion 102 is disc-shaped. The lid portion 102 closes the opening at one axial end of the cylindrical portion 101. The outer diameter of the lid portion 102 is larger than the outer diameter of the cylindrical portion 101, and it extends flange-like from the entire circumference of the cylindrical portion 101 outward in the radial direction of the cylindrical portion 101. The cylindrical portion 101 has a hole portion 105 that penetrates the inside and outside of the cylindrical portion 101 along the radial direction of the cylindrical portion 101. As described above, the connecting member 20 is made of a synthetic resin such as polyvinyl chloride resin.

[0055] The connecting member 20 is connected to the horizontal pipe connecting portion 28 at the end of the cylindrical portion 101 opposite to the lid portion 102 in the axial direction. At this time, the end of the connecting member 20 opposite to the lid portion 102 in the axial direction of the cylindrical portion 101 abuts against the locking portion 28b formed near the opening 28a of the horizontal pipe connecting portion 28. In this state, the connecting member 20 is positioned horizontally such that the central axes of the cylindrical portion 101 and the lid portion 102 coincide with the second axis O2 of the horizontal pipe connecting portion 28. At this time, the connecting member 20 is attached such that the hole portion 105 is positioned at the upper end of the portion of the cylindrical portion 101 that is positioned outside the horizontal pipe connecting portion 28. As a result, the hole portion 105 is positioned above the space 20a inside the connecting member 20, and the space 20a can communicate with the outside of the connecting member 20.

[0056] In the internal state quantity detection structure 1 of the manifold joint member 25 according to the first embodiment, the internal state quantity detection means for detecting state quantities within the manifold joint member 25 includes a vibration detection device 111 (vibration noise detection means) that detects vibration noise as a state quantity within the manifold joint member 25 and detects vibration. The vibration detection device 111 includes an acceleration sensor 112 and an acceleration sensor wiring 113 connected to the acceleration sensor 112 for supplying power to the acceleration sensor 112 and for outputting a signal from the acceleration sensor 112.

[0057] In the internal state quantity detection structure 1, the acceleration sensor 112 of the vibration detection device 111 is attached to the back surface 30b of the first swivel vane 30 facing downwards by adhesive or a bonding material 121 such as adhesive wax. In addition, in the internal state quantity detection structure 1, waterproof tape 122 is attached to the acceleration sensor 112 and the back surface 30b of the first swivel vane 30 so as to cover the acceleration sensor 112.

[0058] In the internal state quantity detection structure 1, the wiring 113 for the acceleration sensor of the vibration detection device 111 is passed through the space 20a inside the connecting member 20, then through the hole 105 in the connecting member 20, and extends from the space 20a inside the connecting member 20 to the outside of the connecting member 20. The other end of this acceleration sensor wiring 113, opposite to the acceleration sensor 112, is connected to a vibration measuring device (not shown).

[0059] Furthermore, the internal state quantity detection structure 1 includes a noise detection device 131 (vibration noise detection means) that detects vibration noise as a state quantity within the manifold joint member 25, as an internal state quantity detection means for detecting state quantities within the manifold joint member 25. The noise detection device 131 includes a microphone 132 and microphone wiring 133 connected to the microphone 132 for supplying power to the microphone 132 and for outputting signals from the microphone 132.

[0060] In the internal state quantity detection structure 1, the microphone wiring 133 of the noise detection device 131 is passed through the hole 105 of the connecting member 20, and the microphone 132 of the noise detection device 131 is suspended in the space 20a inside the connecting member 20 by the microphone wiring 133. In this suspended state, the microphone 132 does not come into contact with the connecting member 20 and is therefore positioned above the lower end inside the connecting member 20. The microphone wiring 133 extends outward from the hole 105 of the connecting member 20, and the end opposite to the microphone 132 is connected to a noise measuring device (not shown). The hole 105 formed in the cylindrical portion 101 of the connecting member 20 has an inner diameter that allows the microphone 132 to pass from the radially outside to the radially inside of the cylindrical portion 101.

[0061] In addition, in the internal state quantity detection structure 1, the hole 105 through which the acceleration sensor wiring 113 and the microphone wiring 133 pass is sealed with a hole-filling material 141 such as putty or clay.

[0062] In the method for detecting the internal state quantity of the manifold joint member 25 according to the first embodiment, the internal state quantity detection structure 1 is constructed, for example, as follows.

[0063] First, the worker inserts the acceleration sensor 112 of the vibration detection device 111 into the manifold joint member 25 from the outside through the space inside the horizontal pipe connection section 28, where the connecting member 20 is not connected, and attaches the acceleration sensor 112 to the back surface 30b of the first swivel vane 30 with adhesive material 121. Then, the worker inserts a waterproof tape 122 of an appropriate size into the manifold joint member 25 through the space inside the horizontal pipe connection section 28, and attaches the waterproof tape 122 to the acceleration sensor 112 and the back surface 30b of the first swivel vane 30 so that it covers the acceleration sensor 112.

[0064] Next, the worker passes the acceleration sensor wiring 113 of the vibration detection device 111 through the cylindrical portion 101 of the connecting member 20 from the side opposite the lid portion 102, and then through the hole portion 105 to extend it radially outward from the cylindrical portion 101. Then, with the hole portion 105 positioned at the top of the cylindrical portion 101, the worker fits the end of the cylindrical portion 101 opposite the lid portion 102 in the axial direction to the horizontal pipe connection portion 28 of the manifold joint member 25 until it abuts against the locking portion 28b. This fixes the connecting member 20 to the horizontal pipe connection portion 28. The acceleration sensor wiring 113 remains passed through the hole portion 105 of the connecting member 20 until it is connected to a vibration measuring device (not shown).

[0065] Alternatively, the worker may pre-suspend the acceleration sensor 112 by the acceleration sensor wiring 113, pass it through the hole 105 of the connecting member 20 before it is attached to the horizontal pipe connection 28, and expose it through the space 20a inside the connecting member 20 from the opening on the opposite side of the axial cover 102 of the cylindrical part 101. In this state, the acceleration sensor wiring 113 remains passed through the hole 105 of the connecting member 20.

[0066] Then, in this state, the worker inserts the acceleration sensor 112, which has passed through the connecting member 20, into the manifold joint member 25 from the outside through the space inside the horizontal pipe connection section 28 where the connecting member 20 is not connected, and attaches it to the back surface 30b of the first swivel vane 30 with adhesive material 121. Next, the worker inserts the waterproof tape 122 into the manifold joint member 25 through the space inside the horizontal pipe connection section 28, and attaches the waterproof tape 122 to the acceleration sensor 112 and the back surface 30b of the first swivel vane 30 so that it covers the acceleration sensor 112.

[0067] Then, in this state, the worker positions the connecting member 20 so that the hole 105 is positioned at the top of the cylindrical portion 101, and fits the end of the cylindrical portion 101 opposite to the axial cover portion 102 into the horizontal pipe connection portion 28 of the manifold joint member 25 until it abuts against the locking portion 28b. This fixes the connecting member 20 to the horizontal pipe connection portion 28.

[0068] During the process of attaching the acceleration sensor 112 to the first rotating vane 30, attaching the waterproof tape 122 to the acceleration sensor 112, and attaching the connecting member 20 to the horizontal pipe connection 28, the acceleration sensor wiring 113 remains passed through the hole 105 of the connecting member 20 and remains in this state until it is connected to a vibration measuring device (not shown). In this case, the hole 105 formed in the cylindrical portion 101 of the connecting member 20 has an inner diameter that allows the acceleration sensor 112 to pass from the radially outside to the radially inside of the cylindrical portion 101.

[0069] As described above, in the internal state quantity detection method according to the first embodiment, a connecting member 20 having a hole 105 and connected to a horizontal pipe connection 28 is provided on the manifold joint member 25, acceleration sensor wiring 113 is passed through the hole 105, and the acceleration sensor 112 is attached to the back surface 30b of the first swivel vane 30 of the manifold joint member 25.

[0070] Next, the worker inserts the microphone 132 of the noise detection device 131 from the radially outside to the radially inside of the connecting member 20 through the hole 105 located at the top of the connecting member 20, which is connected to the horizontal pipe connection 28. At this time, the worker holds the microphone wiring 133 of the noise detection device 131 and inserts the microphone 132 into the hole 105 while suspending it, positioning it within the space 20a of the connecting member 20. Then, the worker secures the microphone wiring 133 to the outside of the connecting member 20 with, for example, tape (not shown) to maintain the height of the microphone 132 within the connecting member 20.

[0071] As described above, in the internal state quantity detection method according to the first embodiment, a connecting member 20 having a hole 105 and connected to a horizontal pipe connection part 28 is provided on the manifold joint member 25, such that the hole 105 is provided on the upper part of the connecting member 20, the microphone wiring 133 is passed through the hole 105, and the microphone 132 is suspended inside the connecting member 20. After that, the hole 105 is filled with the hole-filling material 141.

[0072] In the internal state quantity detection method according to the first embodiment, drainage is flowed from the upper riser pipe 10 to the lower riser pipe 15 via the manifold joint member 25, and drainage flows from the upper riser pipe connection part 26 to the lower riser pipe connection part 36 in the manifold joint member 25. At that time, the vibration, which is a state quantity within the manifold joint member 25, is detected as acceleration with respect to frequency by a vibration measuring device (not shown) from the detection signal detected by the acceleration sensor 112 and output via the acceleration sensor wiring 113, for example, as shown by the solid line in Figure 9. Based on this detection result, it is possible to reduce noise by, for example, redesigning the shape of the manifold joint member 25 to reduce vibrations at frequencies that generate peak acceleration values.

[0073] Furthermore, in the internal state quantity detection method according to the first embodiment, drainage is flowed from the upper riser pipe 10 to the lower riser pipe 15 via the manifold joint member 25, and drainage flows from the upper riser pipe connection part 26 to the lower riser pipe connection part 36 in the manifold joint member 25. At that time, a noise measuring device (not shown) detects the noise, which is a state quantity within the manifold joint member 25, as sound pressure with respect to frequency, from the detection signal detected by the microphone 132 and output via the microphone wiring 133. For example, as shown by the dashed line in Figure 9. Based on this detection result, for example, it is possible to reduce noise by redesigning the shape of the manifold joint member 25 to reduce the sound pressure at the frequency that generates the peak sound pressure value. In this method, to reduce the peak vibration noise measured by this method, the amount of noise reduction inside the soundproof room when the peak vibration noise is reduced can be predicted by measuring the transmission characteristics of the vibration noise and the noise measured by the sound level meter inside the soundproof room described in Patent Document 1. Methods for measuring transfer characteristics include using the noise inside a soundproof room as the numerator and the vibration noise measured by this method as the denominator, as well as operational transfer path analysis (operational TPA (Transfer Path Analysis)).

[0074] The internal state quantity detection method and internal state quantity detection structure 1 for the manifold joint member 25 described above provide the following advantages.

[0075] By passing the vibration detection device 111, which is an internal state quantity detection means and vibration noise detection means, through the hole 105 of the connecting member 20 connected to the horizontal pipe connection portion 28 of the manifold joint member 25, the vibration, which is a state quantity within the manifold joint member 25 and is vibration noise, when drainage is flowed from the upper riser pipe connection portion 26 to the lower riser pipe connection portion 36 of the manifold joint member 25, can be accurately detected by the vibration detection device 111. Moreover, because the vibration detection device 111 is passed through the hole 105 of the connecting member 20 connected to the horizontal pipe connection portion 28 of the manifold joint member 25, the vibration, which is a state quantity within the manifold joint member 25 and is vibration noise, can be easily detected.

[0076] Specifically, the internal state quantity detection method and internal state quantity detection structure 1 for the manifold joint member 25 includes a vibration detection device 111 which contains an acceleration sensor 112 and an acceleration sensor wiring 113 connected to the acceleration sensor 112. The acceleration sensor wiring 113 is passed through a hole 105 in the connecting member 20, and the acceleration sensor 112 is attached to the back surface 30b of the first swivel vane 30 of the manifold joint member 25. As a result, vibration as a state quantity within the manifold joint member 25 when drainage is flowed from the upper riser pipe connection 26 to the lower riser pipe connection 36 can be accurately and easily detected by the acceleration sensor 112 included in the vibration detection device 111. Moreover, because the acceleration sensor 112 is attached to the back surface 30b of the swivel vane 30 of the manifold joint member 25, the amount of drainage applied to the acceleration sensor 112 can be suppressed.

[0077] Furthermore, the internal state quantity detection method and internal state quantity detection structure 1 for the manifold joint member 25 allows for the accurate detection of noise, which is a state quantity within the manifold joint member 25 and is vibration noise, by passing the noise detection device 131, which is an internal state quantity detection means and vibration noise detection means, through the hole 105 of the connecting member 20 connected to the horizontal pipe connection portion 28 of the manifold joint member 25. Moreover, because the noise detection device 131 is passed through the hole 105 of the connecting member 20 connected to the horizontal pipe connection portion 28 of the manifold joint member 25, noise, which is a state quantity within the manifold joint member 25 and is vibration noise, can be easily detected.

[0078] Specifically, the internal state quantity detection method and internal state quantity detection structure 1 for the manifold joint member 25 includes a noise detection device 131 which includes a microphone 132 and microphone wiring 133 connected to the microphone 132. A hole 105 is provided at the top of the connecting member 20 which is connected to the horizontal pipe connection portion 28 of the manifold joint member 25. The microphone wiring 133 is passed through the hole 105, and the microphone 132 is suspended inside the connecting member 20. Therefore, the noise, which is a state quantity inside the manifold joint member 25 when drainage is flowed from the upper riser pipe connection portion 26 to the lower riser pipe connection portion 36, can be accurately and easily detected by the microphone 132 included in the noise detection device 131. Furthermore, since the hole 105 is provided at the top of the connecting member 20, and the microphone wiring 133 is passed through the hole 105 to suspend the microphone 132 inside the connecting member 20, the microphone 132 can be suspended in the space 20a inside the connecting member 20, and even if drainage enters the connecting member 20, the effect of the drainage hitting the microphone 132 can be suppressed.

[0079] In the first embodiment of the internal state quantity detection method and internal state quantity detection structure 1 for the manifold joint member 25 described above, the example was given of passing the acceleration sensor wiring 113 of the vibration detection device 111 and the microphone wiring 133 of the noise detection device 131 through a common hole 105 provided in the connecting member 20. However, the hole for passing the acceleration sensor wiring 113 of the vibration detection device 111 and the hole for passing the microphone wiring 133 of the noise detection device 131 may be provided separately in the connecting member 20. In this case, as described above, it is preferable to pass the microphone wiring 133 through the hole 105 provided in the upper part of the cylindrical part 101 of the connecting member 20 in order to suppress the effect of drainage hitting the microphone 132. However, the hole for passing the acceleration sensor wiring 113 is not limited to this, and can be provided, for example, in the lid part 102 of the connecting member 20, as long as it is above the lower end of the inner space 20a of the connecting member 20.

[0080] Furthermore, in the internal state quantity detection method and internal state quantity detection structure 1 of the manifold joint member 25 of the first embodiment, the case in which a vibration detection device 111 and a noise detection device 131 are provided was explained as an example, but it is also possible to provide only one of the vibration detection device 111 and the noise detection device 131. Here, when only the noise detection device 131 is provided, it is preferable to provide a hole 105 for passing the microphone wiring 133 through at the top of the cylindrical portion 101 of the connecting member 20, as described above. However, when only the vibration detection device 111 is provided, it is not limited to this, and as long as it is above the lower end of the inner space 20a of the connecting member 20, for example, as shown in Figure 10, it is also possible to provide a hole 105 for passing the acceleration sensor wiring 113 through at the lid portion 102 of the connecting member 20. In this case as well, the hole 105 through which the acceleration sensor wiring 113 is passed is filled and closed with a hole-filling material 141.

[0081] [Second Embodiment] Next, the internal state quantity detection method and internal state quantity detection structure of the manifold joint member according to the second embodiment of the present invention will be described, mainly with reference to Figure 11, focusing on the differences from the first embodiment. The internal state quantity detection structure 1A according to the second embodiment has a connecting member 20A, which is different from the connecting member 20, in place of the connecting member 20.

[0082] The connecting member 20A has a lower cylindrical portion 201, a curved cylindrical portion 202, an upper cylindrical portion 203, and a lid portion 204. The lower cylindrical portion 201 is cylindrical. The curved cylindrical portion 202 is connected to one end of the lower cylindrical portion 201 in the axial direction and extends from the lower cylindrical portion 201 so as to bend 90 degrees with respect to the axial direction of the lower cylindrical portion 201. The upper cylindrical portion 203 is cylindrical and is connected to the end of the curved cylindrical portion 202 opposite to the lower cylindrical portion 201. The upper cylindrical portion 203 extends from the curved cylindrical portion 202 so as to be perpendicular to the axial direction of the lower cylindrical portion 201. The lid portion 204 closes the opening of the upper cylindrical portion 203 on the side of the curved cylindrical portion 202 in the axial direction. The lid portion 204 has an outer diameter larger than the outer diameter of the upper cylindrical portion 203 and extends flange-like from the entire circumference of the upper cylindrical portion 203 outward in the radial direction of the upper cylindrical portion 203. The connecting member 20A is also made of synthetic resin such as polyvinyl chloride resin. The lid portion 204 has a hole portion 205 that penetrates the inside and outside of the lid portion 204 along the axial direction of the lid portion 204.

[0083] The connecting member 20A is connected to the horizontal pipe connecting portion 28 at the end of the lower cylindrical portion 201 opposite to the curved cylindrical portion 202 in the axial direction. At this time, the end of the connecting member 20A opposite to the curved cylindrical portion 202 in the axial direction of the lower cylindrical portion 201 abuts against the locking portion 28b formed near the opening 28a of the horizontal pipe connecting portion 28. In this state, the connecting member 20A is positioned horizontally with the central axis of the lower cylindrical portion 201 coinciding with the second axis O2 of the horizontal pipe connecting portion 28. At this time, the connecting member 20A is installed such that the curved cylindrical portion 202 extends upward from the lower cylindrical portion 201 and the upper cylindrical portion 203 is positioned vertically. Therefore, in this state, a lid portion 204 having a hole portion 205 is positioned at the upper end of the connecting member 20A.

[0084] The internal state quantity detection structure 1A of the manifold joint member 25 according to the second embodiment also includes a vibration detection device 111 which includes an acceleration sensor 112 and wiring 113 for the acceleration sensor, and the acceleration sensor 112 is attached to the back surface 30b of the first swivel vane 30 facing downward by an adhesive material 121. In addition, in the internal state quantity detection structure 1A as well, waterproof tape 122 is attached to the acceleration sensor 112 and the back surface 30b of the first swivel vane 30 so as to cover the acceleration sensor 112.

[0085] In the internal state quantity detection structure 1A, the wiring 113 for the acceleration sensor of the vibration detection device 111 is passed through the space 20Aa within the connecting member 20A, then through the hole 205 of the connecting member 20A, extending from the space 20Aa within the connecting member 20A to the outside of the connecting member 20A, and connected to a vibration measuring device (not shown).

[0086] Furthermore, the internal state quantity detection structure 1A includes a noise detection device 131 which includes a microphone 132 and microphone wiring 133. In the internal state quantity detection structure 1A, the microphone wiring 133 is passed through the hole 205 of the connecting member 20A, and the microphone 132 is suspended by the microphone wiring 133 in the space 20Aa within the connecting member 20A. In this suspended state, the microphone 132 does not come into contact with the connecting member 20A, and is therefore floating in the space 20Aa within the connecting member 20A. Specifically, the microphone 132 is installed inside the upper cylindrical part 203, at the same height as the upper cylindrical part 203. The microphone wiring 133 extends to the outside from the hole 205 of the connecting member 20A and is connected to a noise measuring device (not shown). The hole 205 of the connecting member 20A has an inner diameter that allows the microphone 132 to pass through from the axial outer side to the radial inner side of the cover 204.

[0087] In addition, in the internal state quantity detection structure 1A, the hole 205 through which the acceleration sensor wiring 113 and the microphone wiring 133 pass is closed with a hole-filling material 141.

[0088] In the method for detecting the internal state quantity of the manifold joint member 25 according to the second embodiment, the internal state quantity detection structure 1A is constructed, for example, as follows.

[0089] First, the worker inserts the acceleration sensor 112 of the vibration detection device 111 into the manifold joint member 25 from the outside through the space inside the horizontal pipe connection section 28, where the connecting member 20A is not connected, and attaches the acceleration sensor 112 to the back surface 30b of the first swivel vane 30 with adhesive material 121. Then, the worker inserts a waterproof tape 122 of an appropriate size into the manifold joint member 25 through the space inside the horizontal pipe connection section 28, and attaches the waterproof tape 122 to the acceleration sensor 112 and the back surface 30b of the first swivel vane 30 so as to cover the acceleration sensor 112.

[0090] Next, the worker passes the wiring 113 for the acceleration sensor of the vibration detection device 111 through the space 20Aa inside the lower cylindrical portion 201, the curved cylindrical portion 202, and the upper cylindrical portion 203 of the connecting member 20A from the side opposite the lid portion 204, and further through the hole portion 205 to extend it outward in the axial direction of the lid portion 204. Then, with the lid portion 204 having the hole portion 205 positioned at the upper end of the connecting member 20A, the worker fits the end of the lower cylindrical portion 201 opposite to the axially curved cylindrical portion 202 into the horizontal pipe connection portion 28 of the manifold joint member 25 until it abuts against the locking portion 28b. This fixes the connecting member 20A to the horizontal pipe connection portion 28.

[0091] Alternatively, the worker may pre-suspend the acceleration sensor 112 by the acceleration sensor wiring 113, pass it through the hole 205 of the connecting member 20A before it is attached to the horizontal pipe connection 28, and expose it through the inner space 20Aa of the connecting member 20A from the opening on the opposite side of the axially curved cylindrical portion 202 of the lower cylindrical portion 201 of the connecting member 20A. In this state, the acceleration sensor wiring 113 remains passed through the hole 205 of the connecting member 20A.

[0092] Then, in this state, the worker inserts the acceleration sensor 112, which has passed through the connecting member 20A, into the manifold joint member 25 from the outside through the space inside the horizontal pipe connection section 28, where the connecting member 20A is not connected, and attaches it to the back surface 30b of the first swivel vane 30 with adhesive material 121. Next, the worker inserts the waterproof tape 122 into the manifold joint member 25 through the space inside the horizontal pipe connection section 28, and attaches the waterproof tape 122 to the acceleration sensor 112 and the back surface 30b of the first swivel vane 30 so that it covers the acceleration sensor 112.

[0093] Then, in this state, the worker positions the connecting member 20A with the lid portion 204 having the hole portion 205 facing upwards, and fits the end of the lower cylindrical portion 201 opposite to the axially curved cylindrical portion 202 into the horizontal pipe connection portion 28 of the manifold joint member 25 until it abuts against the locking portion 28b. This fixes the connecting member 20A to the horizontal pipe connection portion 28.

[0094] During the process of attaching the acceleration sensor 112 to the first rotating vane 30, attaching the waterproof tape 122 to the acceleration sensor 112, and attaching the connecting member 20A to the horizontal pipe connection 28, the acceleration sensor wiring 113 remains passed through the hole 205 of the connecting member 20A and remains in this state until it is connected to a vibration measuring device (not shown). In this case, the hole 205 formed in the cover portion 204 of the connecting member 20A has an inner diameter that allows the acceleration sensor 112 to pass from the axial outer side to the axial inner side of the cover portion 204.

[0095] As described above, in the internal state quantity detection method according to the second embodiment, a connecting member 20A having a hole 205 and connected to the horizontal pipe connection 28 is provided on the manifold joint member 25, an acceleration sensor wiring 113 is passed through the hole 205, and an acceleration sensor 112 is attached to the back surface 30b of the first swivel vane 30 of the manifold joint member 25.

[0096] Next, the worker inserts the microphone 132 of the noise detection device 131 from the outside to the inside of the connecting member 20A through the hole 205 located at the upper end of the connecting member 20A, which is connected to the horizontal pipe connection 28. At this time, the worker holds the microphone wiring 133 of the noise detection device 131 and inserts the microphone 132 into the hole 205 by a predetermined amount while suspending it. Then, the worker secures the microphone wiring 133 to the outside of the connecting member 20A with, for example, tape (not shown) to maintain the height of the microphone 132 inside the connecting member 20A.

[0097] As described above, in the internal state quantity detection method according to the second embodiment, a connecting member 20A having a hole 205 and connected to a horizontal pipe connection 28 is provided on the manifold joint member 25 such that the hole 205 is provided on the upper part of the connecting member 20A, the microphone wiring 133 is passed through the hole 205 and the microphone 132 is suspended inside the connecting member 20A. After that, the hole 205 is filled with the hole-filling material 141.

[0098] In the internal state quantity detection method according to the second embodiment, drainage is flowed from the upper riser pipe 10 to the lower riser pipe 15 via the manifold joint member 25, thereby allowing drainage to flow from the upper riser pipe connection part 26 to the lower riser pipe connection part 36 in the manifold joint member 25. At that time, vibration, which is a state quantity within the manifold joint member 25, is detected and measured by a vibration measuring device (not shown) based on a detection signal detected by the acceleration sensor 112 and output via the acceleration sensor wiring 113.

[0099] Furthermore, in the internal state quantity detection method according to the second embodiment, drainage is flowed from the upper riser pipe 10 to the lower riser pipe 15 via the manifold joint member 25, thereby allowing drainage to flow from the upper riser pipe connection part 26 to the lower riser pipe connection part 36 in the manifold joint member 25. At that time, the noise, which is a state quantity inside the manifold joint member 25, is detected and measured by a noise measuring device (not shown) from the detection signal detected by the microphone 132 and output via the microphone wiring 133.

[0100] The internal state quantity detection method and internal state quantity detection structure 1A of the manifold joint member 25 of the second embodiment described above provides the same effects as the internal state quantity detection method and internal state quantity detection structure 1 of the manifold joint member 25 of the first embodiment.

[0101] In addition, according to the internal state quantity detection method and internal state quantity detection structure 1A of the second embodiment, the connecting member 20A extends upward from the horizontal pipe connection portion 28 of the manifold joint member 25, and the microphone 132 is suspended inside the connecting member 20A from the hole 205 provided at the upper end of the connecting member 20A. As a result, the microphone 132 can be greatly elevated in the space 20Aa inside the connecting member 20A, and even if drainage enters the connecting member 20A, the impact of the drainage hitting the microphone 132 can be further suppressed.

[0102] In the second embodiment of the internal state quantity detection method and internal state quantity detection structure 1A of the manifold joint member 25 described above, the example was given in which the wiring 113 for the acceleration sensor of the vibration detection device 111 and the wiring 133 for the microphone of the noise detection device 131 are passed through a common hole 205 provided in the connecting member 20A. However, the hole for the wiring 113 for the acceleration sensor of the vibration detection device 111 and the hole for the wiring 133 for the microphone of the noise detection device 131 may be provided separately in the connecting member 20A. In this case, as described above, it is preferable to pass the microphone wiring 133 through the hole 205 provided in the lid portion 204 at the upper end of the connecting member 20A. However, the hole for the wiring 113 is not limited to this, and can be provided in, for example, the lower cylindrical portion 201 or the curved cylindrical portion 202 of the connecting member 20A, as long as it is above the lower end of the inner space 20Aa of the connecting member 20A.

[0103] Furthermore, in the second embodiment of the method for detecting the internal state quantity of the manifold joint member 25 and the internal state quantity detection structure 1A, the case in which a vibration detection device 111 and a noise detection device 131 are provided was described as an example, but it is also possible to provide only one of the vibration detection device 111 and the noise detection device 131. In particular, when only the noise detection device 131 is provided, it is preferable to use the connecting member 20A of the second embodiment, which has a hole 205 for passing microphone wiring 133 through the cover portion 204 at the upper end.

[0104] In the first embodiment of the method and structure 1 for detecting internal state quantities of the manifold joint member 25, and the second embodiment of the method and structure 1A for detecting internal state quantities of the manifold joint member 25, the case in which a vibration detection device 111 and a noise detection device 131 are provided as internal state quantity detection means for detecting state quantities within the manifold joint member 25 has been described as an example. However, the method is also applicable when various internal state quantity detection means other than the vibration detection device 111 and the noise detection device 131 are provided to detect state quantities within the manifold joint member 25. For example, when drainage is flowed from the upper riser pipe 10 through the manifold joint member 25 to the lower riser pipe 15, the method is also applicable when a vibration force detection device is provided in the manifold joint member 25 to detect the vibration force of the drainage when drainage flows from the upper riser pipe connection part 26 to the lower riser pipe connection part 36. In this case, the load cell that constitutes the vibration force detection device is attached, for example, to the surface 30a of the first swivel vane 30 of the manifold joint member 25, and the wiring for the load cell, which is connected to the load cell and also constitutes the vibration force detection device, is passed through the holes 105 and 205 of the connecting members 20 and 20A.

[0105] Furthermore, while the internal state quantity detection method and internal state quantity detection structure 1 for the manifold joint member 25 of the first embodiment and the internal state quantity detection method and internal state quantity detection structure 1A for the manifold joint member 25 of the second embodiment were described using the case where the manifold joint member 25 has one horizontal pipe connection portion 28 as an example, the manifold joint member 25 may have one or more other horizontal pipe connection portions that are aligned in height with the horizontal pipe connection portion 28 but oriented differently in the horizontal direction. In other words, the manifold joint member 25 only needs to have one or more horizontal pipe connection portions 28. Even when the manifold joint member 25 is provided with multiple horizontal pipe connection portions 28, the internal state quantity detection method and internal state quantity detection structure 1 for the manifold joint member 25 of the first embodiment or the internal state quantity detection method and internal state quantity detection structure 1A for the manifold joint member 25 of the second embodiment can be applied to one of the horizontal pipe connection portions 28.

[0106] Although the first and second embodiments of the present invention have been described in detail above with reference to the drawings, the specific configurations are not limited to these embodiments, and modifications, combinations, deletions, etc., of the configurations are also included without departing from the spirit of the present invention. Furthermore, it goes without saying that each of the configurations shown in each embodiment can be used in appropriate combinations. [Explanation of Symbols]

[0107] 1.1A Internal State Variable Detection Structure 20,20A Connecting Member 25 Manifold joint member 26 Upper riser connection 28 Horizontal pipe connection 30. First swivel blade (swivel blade) 30b back side 36 Lower riser connection 105,205 Hole 111 Vibration detection device (internal state quantity detection means, vibration noise detection means) 112 Accelerometer 113 Wiring for acceleration sensor 131 Noise detection device (internal state quantity detection means, vibration noise detection means) 132 Microphones 133 Microphone wiring

Claims

1. A method for detecting the internal state quantity of a manifold joint member, comprising: providing a connecting member having a hole and connected to the horizontal pipe connection portion of a manifold joint member having an upper vertical pipe connection portion, a lower vertical pipe connection portion, and one or more horizontal pipe connection portions, and passing an internal state quantity detection means for detecting the state quantity within the manifold joint member through the hole, thereby detecting the state quantity within the manifold joint member with the internal state quantity detection means.

2. The method for detecting the internal state quantity of a manifold joint member according to claim 1, wherein the internal state quantity detection means is a vibration noise detection means for detecting vibration noise.

3. The method for detecting the internal state quantity of a manifold joint member according to claim 2, wherein the vibration noise detection means includes an acceleration sensor and wiring for the acceleration sensor connected to the acceleration sensor, the wiring for the acceleration sensor is passed through the hole, and the acceleration sensor is attached to the back surface of the swivel vane of the manifold joint member.

4. The aforementioned hole is provided on the upper part of the connecting member. The vibration noise detection means includes a microphone and microphone wiring connected to the microphone, the microphone wiring is passed through the hole, and the microphone is suspended inside the connecting member, as described in claim 2 or 3, for detecting the internal state quantity of a manifold joint member.

5. A manifold joint member having an upper vertical pipe connection, a lower vertical pipe connection, and one or more horizontal pipe connection sections, An internal state quantity detection means for detecting state quantities within the aforementioned manifold joint member, An internal state quantity detection structure for a manifold joint member, comprising: a connecting member having a hole through which the internal state quantity detection means passes and connected to the horizontal pipe connection portion.

6. The internal state quantity detection structure for a manifold joint member according to claim 5, wherein the internal state quantity detection means is a vibration noise detection means for detecting vibration noise.

7. The vibration noise detection means includes an acceleration sensor and wiring for the acceleration sensor connected to the acceleration sensor, the wiring for the acceleration sensor is passed through the hole, and the acceleration sensor is attached to the back surface of the swivel vane of the manifold joint member, as described in claim 6.

8. The aforementioned hole is provided on the upper part of the connecting member, The vibration noise detection means includes a microphone and microphone wiring connected to the microphone, wherein the microphone wiring is passed through the hole and the microphone is suspended inside the connecting member, the internal state quantity detection structure for a manifold joint member according to claim 6 or 7.

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