JP7123391B2 - Enclosure device - Google Patents

Description

The present invention relates to a housing device attached to a fluid pipe.

2. Description of the Related Art Conventionally, there has been known a construction method in which a pipe wall of a fluid pipe such as a water pipe is perforated in an uninterrupted state, and a branch flow path is formed through an opening provided thereby. In such a construction method, a branch case body that encloses the outer peripheral surface of the existing fluid pipe in a sealed state, and a valve device that opens and closes the branch flow path are used. Patent Literature 1 describes a branch pipe connection device having a gate valve as a valve device. This sluice valve has a valve body inside a main body (valve box) connected to the branch case body, and is configured to be able to open and close the branch flow path in accordance with the upward/downward movement of the valve body.

Patent Document 2 proposes a device that opens and closes a branch flow path by placing a valve element between the inner peripheral surface of the branch case body and the outer peripheral surface of the fluid pipe and rotating the valve element in the pipe circumferential direction. It is According to this, since the main body (valve box) connected to the branch case body is omitted, it is possible to reduce the size of the drilling machine used for drilling the fluid pipe. However, since the uneven shape of the valve body and the gear mesh with each other, and the gear exclusively provides the driving force, the resistance when rotating the valve body is large, and there is room for improvement in the workability when opening and closing. there were.

JP 2007-309474 A JP 2014-20474 A

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is to rotate a valve body disposed between the inner peripheral surface of the branch case body and the outer peripheral surface of the fluid pipe to open and close the branch flow path. To provide a housing device capable of improving workability when

A housing device according to the present invention includes a branch case body surrounding an outer peripheral surface of a fluid pipe in a sealed state, a branch pipe portion provided in the branch case body and protruding in a radial direction of the fluid pipe, and the branch case. A branch flow path that rotates along the tube circumferential direction between the inner peripheral surface of the body and the outer peripheral surface of the fluid tube and connects the opening provided in the tube wall of the fluid tube and the branch tube portion. a valve body configured to be openable and closable; a wire connected to the valve body; The body is rotatable. According to such a configuration, the valve body can be rotated according to the winding operation of the wire, so that the resistance when rotating the valve body can be reduced, and the workability when opening and closing the branch flow path can be improved.

A plurality of wires including a first wire and a second wire are connected to the valve body, and a first spool for winding the first wire and a second spool for winding the second wire are the It is provided in the branch case body, and by rotating the first spool and winding the first wire, the valve body rotates in a direction to open the branch flow path, and rotates the second spool. It is preferable that the valve body rotates in a direction to close the branched flow path by winding the second wire rod. According to such a configuration, the branch flow path can be opened by winding the first wire around the first spool, and the branch flow path can be closed by winding the second wire around the second spool.

The operation unit includes an operation shaft having a worm and a worm wheel that meshes with the worm. By rotating the operating shaft in the other direction, the first wire is wound onto the first spool, and the second wire is unwound from the second spool. It is preferable that the wire is wound on the second spool and the first wire is let out from the first spool. According to such a configuration, the branch flow path can be freely opened and closed by rotating the operation shaft.

It is preferable that the valve body has an uneven meshing portion that meshes with the worm wheel or a gear fixed to the rotary support shaft of the worm wheel in the final stage of closing the branch flow path. According to such a configuration, when closing the branch flow path, a torque for pushing the valve body into the final position is applied, and workability can be further improved. In addition, when opening the branch flow path, starting torque can be applied to the valve body, to which water pressure acts only on one side, so workability is also improved.

A first pulley that turns back the first wire drawn out from the first spool and feeds it toward the valve body, and/or turns back the second wire that is drawn out from the second spool and turns it toward the valve body It is preferred to have a second pulley for feeding out. According to such a configuration, it is possible to apply an appropriate tension to the first wire and/or the second wire and rotate the valve body more smoothly.

The operating portion is arranged in the central portion of the branch case body in the pipe axial direction, and the first spool and the second spool are arranged at both end portions of the branch case body in the pipe axial direction. preferable. With such a configuration, the valve body can be rotated at both ends of the branch case body in a well-balanced manner.

The first spool and the second spool are supported by a support member configured as a separate member from the branch case body, and the valve body, the first wire and the second wire, the worm wheel, the The branch case body is placed on the valve body unit formed by combining the first spool, the second spool, and the support member, and a fastener is attached to the support member from the outside of the branch case body, whereby the valve body unit is preferably assembled to the branch case body. By assembling the valve body unit to the branch case body in this manner, the workability when attaching the housing device to the fluid pipe can be significantly improved.

1 is a perspective view showing an example of a housing device according to the present invention; FIG. FIG. 2 is a perspective view showing a state in which a second split case is removed from the housing device of FIG. 1; FIG. 2 is a perspective view showing a state in which a second split case is removed from the housing device of FIG. 1; Longitudinal cross-sectional view of housing device Perspective view showing the valve body unit Plan view showing the end of the valve body unit Vertical cross-sectional view of the housing device along the path of the first wire Vertical cross-sectional view of the housing device along the path of the second wire Enlarged view showing area X in FIG. The perspective view which shows an example of the pulley which turns back a wire. A perspective view showing the second split case of the branch case body assembled with the valve body unit. The figure which shows the modification of a torque provision mechanism The figure which shows the modification of a guide structure

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a housing device 9 attached to an existing water pipe K (an example of a fluid pipe). 2 and 3 show the state in which the second split case 12 is removed from the housing device 9, respectively. In FIG. 2 the branch channel is closed and in FIG. 3 the branch channel is open. Moreover, in FIG. 3, the water pipe K is shown through. Unless otherwise specified, "pipe circumferential direction", "pipe axial direction" and "pipe radial direction" in this specification refer to the circumferential direction, axial direction and radial direction of the water pipe K, respectively. The water pipe K extends along the pipe axis direction, and water, which is a fluid, flows through its interior. The water pipe K is made of ductile cast iron.

As shown in FIGS. 1 to 3, the housing device 9 includes a branch case body 1 surrounding the outer peripheral surface of the water pipe K in a sealed state. The branch case body 1 is made of, for example, ductile cast iron. The branch case body 1 is composed of a plurality of split cases including a first split case 11 and a second split case 12 . In this embodiment, the branch case body 1 is composed of a first split case 11 arranged below the water pipe K and a second split case 12 arranged above the water pipe K. and surrounds a portion of the water pipe K. A sealing member 13 is attached to each of the first and second split cases 11 and 12 to seal the gap between the branch case body 1 and the water pipe K (see FIG. 4).

The branch case body 1 is formed of a split T-tube with a split upper and lower structure, and has split portions 10, 10 at two locations in the tube circumferential direction. In each split portion 10, a pair of flange-shaped joint surfaces 14, 14 face each other. A pair of joint surfaces 14, 14 are provided at circumferential ends of the first and second split cases 11, 12, respectively. A fastener 15 made up of a bolt and a nut is attached to each split portion 10 . Each joint surface 14 is provided with a bolt hole for inserting a bolt of the fastener 15 . The first split case 11 and the second split case 12 are joined together by tightening the split portion 10 with the fastener 15 .

The casing device 9 is provided in the branch case body 1 and includes a branch pipe portion 1b protruding in the pipe radial direction of the water pipe K. As shown in FIG. In this embodiment, the branch pipe portion 1b is composed of the connection pipe 2. As shown in FIG. The connection pipe 2 is connected to the branch case body 1 with the end portion 2 a sandwiched between the first split case 11 and the second split case 12 . An opening 20 is provided in the pipe wall of the water pipe K (see FIG. 4), and a branch flow path connecting the opening 20 and the branch pipe portion 1b (that is, the connecting pipe 2) is the pipe of the water pipe K. It is formed by branching from the main flow path along the axial direction. An end portion 2b of the connection pipe 2 exposed from the branch case body 1 is connected to a cover or a branch pipe (not shown). The end 2b is formed as a receptacle with a flange, but is not limited to this.

As described above, in the casing device 9 of the present embodiment, the branch case body 1 is divided into upper and lower halves, and the end portion 2a of the connecting pipe 2 is sandwiched between the divided portions 10 thereof. According to such a configuration, the bolt of the fastener 15 is oriented vertically, so even if an external force due to an earthquake or the like acts on the connection pipe 2, the gap between the split parts 10 (between the first split case 11 and the second split case 12) is maintained. between ) is difficult to open. On the other hand, if the branch case body is split into left and right and the bolts of the fasteners are oriented horizontally, the bolts will stretch when an external force such as an earthquake acts on the connecting pipe, gap tends to open easily.

FIG. 4 is a vertical cross-sectional view schematically showing the housing device 9 cut along the tube axis of the connection pipe 2, and corresponds to the cross-sectional view taken along line AA in FIG. As shown in FIGS. 2 to 4, the housing device 9 has a valve body 3. As shown in FIGS. The valve body 3 rotates along the pipe circumferential direction between the inner peripheral surface of the branch case body 1 and the outer peripheral surface of the water pipe K, and opens and closes the branch flow path connecting the opening 20 and the branch pipe portion 1b. configured as possible. The valve body 3 is formed of a plate-like member curved in an arc shape along the pipe circumferential direction. 2 and 4A, the end portion 2a of the connecting pipe 2 is closed by the valve body 3 to close the branch flow path. By rotating the valve body 3 to open the end portion 2a as shown in FIGS. 3 and 4B, the branch flow path is opened.

The valve body 3 is made of ductile cast iron, but may be made of other materials such as steel and resin. The valve body 3 is formed larger than the opening 20 in the pipe circumferential direction and the pipe axial direction so that the opening 20 can be closed. A sealing material 31 is attached to the outer peripheral surface of the valve body 3 . The sealing material 31 abuts on the end surface of the connection pipe 2 when closing the branch flow path. The sealing material 31 is formed in an annular shape, but is not limited to this as long as it can seal between the outer peripheral surface of the valve body 3 and the end surface of the connecting pipe 2 . It is also possible to attach the sealing material 31 to the end face of the connection pipe 2 instead of the outer peripheral face of the valve body 3 .

The housing device 9 includes a wire 4 connected to the valve body 3 and an operation portion 5 provided on the branch case body 1 . Although a cord made of organic fibers such as aramid fibers is preferably used as the wire 4, it is not limited to this, and metal wires such as stainless steel may be used. The housing device 9 is configured such that the valve body 3 can be freely rotated according to the winding operation of the wire rod 4 by the operation portion 5 . For this reason, compared with the structure described in the above-mentioned Patent Document 2, in which a gear meshing with the uneven shape of the valve body exclusively applies the driving force, the resistance when rotating the valve body 3 is small, and the branch flow is reduced. Workability is improved when opening and closing the road.

FIG. 5 is a perspective view showing the valve body unit 8 comprising the valve body 3 and a drive unit 81 which will be described later. FIG. 6 is a plan view showing an end portion of the valve body unit 8 in the pipe axis direction. As shown in FIGS. 5 and 6 , a plurality of wires 4 including a first wire 41 and a second wire 42 are connected to the valve body 3 . The branch case body 1 (not shown in FIGS. 5 and 6) is provided with a first spool 61 for winding the first wire 41 and a second spool 62 for winding the second wire 42 . The first and second spools 61 and 62 are attached to the branch case body 1 via support members 82 . In the present embodiment, the first spool 61 and the second spool 62 are integrally provided via the partition portion 60, but the configuration is not limited to this.

FIG. 7 is a longitudinal sectional view of the housing device 9 along the route of the first wire 41. As shown in FIG. FIG. 8 is a vertical cross-sectional view of the housing device 9 along the path of the second wire rod 42, viewed from the opposite direction to FIG. 7(A) and 8(A) show the state in which the branch channel is open, and in FIGS. 7(B) and 8(B) the branch channel is in the closed state. As shown in FIG. 7A, by rotating the first spool 61 and winding the first wire rod 41, the valve body 3 rotates in the direction to open the branch flow path. Further, as shown in FIG. 8A, by rotating the second spool 62 to wind the second wire rod, the valve body 3 rotates in the direction to close the branch flow path.

The operating portion 5 includes an operating shaft 50 having a worm 51 and a worm wheel 52 meshing with the worm 51 . The worm wheel 52 has a rotating shaft 52a oriented in the horizontal direction (more specifically, in the axial direction of the water pipe K), and the first spool 61 and the second spool 62 are attached to the rotating shaft 52a. It is stuck. In this embodiment, the first wire rod 41 is wound around the first spool 61 and the second wire rod 42 is let out from the second spool 62 by rotating the operating shaft 50 in one direction. Further, by rotating the operating shaft 50 in the other direction, the second wire rod 42 is wound onto the second spool 62 and the first wire rod 41 is let out from the first spool 61 .

That is, when the operating shaft 50 is rotated in one direction (for example, clockwise in plan view), the first spool 61 rotates clockwise in FIG. , the valve body 3 is pulled up. As a result, as shown in FIG. 7(A), the valve body 3 rotates to one side in the pipe circumferential direction (R1 direction), the end portion 2a of the connecting pipe 2 is released, and the branch flow path is opened. At the same time, the second spool 62 rotates counterclockwise (clockwise in FIG. 7) in FIG. The second wire rod 42 is let out from the second spool 62 as shown in (A).

Also, when the operating shaft 50 is rotated in the other direction (for example, counterclockwise in plan view), the second spool 62 rotates clockwise in FIG. and the valve body 3 is pulled up. As a result, as shown in FIG. 8(B), the valve body 3 rotates to the other side in the pipe circumferential direction (R2 direction), the end 2a of the connecting pipe 2 is closed, and the branch flow path is closed. At the same time, the first spool 61 rotates counterclockwise (clockwise in FIG. 8) in FIG. The first wire rod 41 is let out from the first spool 61 as shown in (B).

The tip of the first wire rod 41 drawn out from the first spool 61 is connected to the circumferential end E1 of the valve body 3 . The circumferential end E1 is located below the opening 20 when the branch flow path is closed. A tip end of the second wire rod 42 drawn out from the second spool 62 is connected to the circumferential end portion E2 of the valve body 3 . The circumferential end E2 is located above the opening 20 when the branch flow path is closed. In this embodiment, the wheels 32, 32 are provided at the circumferential ends E1, E2, respectively, so that the frictional resistance against the outer peripheral surface of the water pipe K is reduced, and the valve body 3 can be rotated smoothly. The ends of the first and second wires 41 and 42 are loosely tied in a loop around the wheel 32 so that they can rotate relative to the wheel 32 .

As shown in FIGS. 5 and 6, the outer peripheral surface of the valve body 3 is formed with circumferential grooves 33 and 34 in which the first and second wires 41 and 42 are arranged. The first wire rod 41 fed out from the first spool 61 extends to the other side (R2 direction) in the pipe circumferential direction inside the circumferential groove 33 and reaches (the wheel 32 of) the circumferential end E1 of the valve body 3. reach. The second wire rod 42 fed out from the second spool 62 extends to one side (R1 direction) in the pipe circumferential direction inside the circumferential groove 34, and reaches (the wheel 32 of) the circumferential end E2 of the valve body 3. reach. By guiding the wire rod 4 by the pair of circumferential grooves 33 and 34, even if the first and second wire rods 41 and 42 are loosened to some extent, they do not interfere with the sealing member 31 or become entangled with each other.

As shown in FIG. 5, in this embodiment, a gear 53 is fixed to a rotary support shaft 52a of a worm wheel 52. As shown in FIG. The gear 53 is composed of a spur gear. The gear 53 is arranged in the central portion of the valve body 3 in the pipe axis direction. As shown in FIG. 9 , the valve body 3 has an uneven meshing portion 35 that meshes with the gear 53 . The meshing portion 35 is locally provided in the vicinity of the circumferential end E2 of the valve body 3 . The meshing portion 35 has a gear shape in which a plurality of ridges are arranged in the pipe circumferential direction, but is not limited to this, and may be a simple rib shape composed of a single ridge. The meshing portion 35 is located above the opening 20 (or the sealing material 31) in a state in which the branch flow path is closed.

The meshing portion 35 does not generally mesh with the gear 53 in the process of rotating the valve body 3, but in the final stage of closing the branch flow path, that is, just before the end 2a of the connecting pipe 2 is closed. meshes with the gear 53 at . According to such a configuration, when closing the branch flow path, the torque for pushing the valve body 3 into the final position is applied, and workability can be further improved. In addition, when opening the branch flow path, starting torque can be applied to the valve body 3 on which the water pressure acts from one side, so workability is also improved. In this manner, the meshing portion 35 is used as an aid for obtaining water stopping torque and starting torque. A worm wheel 52 may be configured to mesh with the meshing portion 35 instead of the gear 53 .

In this embodiment, protrusions 36 are provided on the outer peripheral surface of the valve body 3 . A notch-shaped through hole 21 is formed in the end surface of the connecting pipe 2 . By arranging the valve body 3 at the final position (final water stop position) when closing the branch flow path, the protrusion 36 is fitted and the through hole 21 is sealed. According to this configuration, the through hole 21 is open until just before the end 2a of the connecting pipe 2 is closed, and the same pressure is maintained between one side and the other side of the valve body 3. The valve body 3 rotates smoothly. When opening the branch flow path, the pressure is released through the through-hole 21 when the starting torque is applied and the valve body 3 is slightly rotated, although the pressure becomes one-sided. do. A protrusion 37 (see FIG. 5) provided on the opposite side also has the same function.

In this embodiment, the operation part 5 is arranged at the central portion of the branch case body 1 in the pipe axial direction, and the first spool 61 and the second spool 62 are arranged at both ends of the branch case body 1 in the pipe axial direction. It is That is, first and second spools 61 and 62 are also provided on the opposite end not shown in FIG. As a result, the valve body 3 can be pulled up at both ends of the branch case body 1 in a well-balanced manner and rotated smoothly. The first and second spools 61 and 62 and the first and second wire rods 41 and 42 wound thereon are arranged at positions that do not overlap the sealing member 31 in the tube axial direction.

As shown in FIG. 10, a first pulley 71 that feeds out the first wire rod 41 drawn out from the first spool 61 toward the valve body 3 by folding back and/or a second wire rod 42 that is drawn out from the second spool 62 is provided. It is preferable to provide a second pulley 72 that is folded back and sent out toward the valve body 3 . As a result, an appropriate tension is applied to the first and second wires 41 and 42, and the valve body 3 can be rotated more smoothly. Even in such a case, the lines of flow of the first and second wires 41 and 42 are linear along the circumferential direction of the pipe in plan view. The first and second pulleys 71 and 72 are provided on the branch case body 1 and supported by a support member 82 described later in this embodiment. The same parts as the wheel 32 can be used for the first and second pulleys 71 and 72 .

As shown in FIG. 10, the axial centers of the first and second pulleys 71 and 72 are arranged below the axial centers of the first and second spools 61 and 62 (that is, the center of the rotation support shaft 52a). there is Further, the axial center of the first pulley 71 is arranged on one side (R1 direction) in the pipe circumferential direction from the axial center of the first spool 61, and the axial center of the second pulley 72 is arranged from the axial center of the second spool 62 in the pipe. It is arranged on the other circumferential side (R2 direction). The first wire rod 41 fed out from the first spool 61 hangs down toward one side in the pipe circumferential direction (R1 direction), is folded back by the first pulley 71, and extends to the other side in the pipe circumferential direction (R2 direction). The second wire rod 42 fed out from the second spool 62 hangs down toward the other side (R2 direction) in the pipe circumferential direction, is folded back by the second pulley 72, and extends to one side (R1 direction) in the pipe circumferential direction.

As shown in FIGS. 4 and 9 , (the second split case 12 of) the branch case body 1 is provided with a through hole 16 , and the gear 53 is meshed with the meshing portion 35 through the through hole 16 . It is conceivable that the wire rod 4 fed out from the spool is also arranged inside the branch case body 1 through a similar through hole. is required to be connected to the valve body 3, and since the branch case body 1 and the valve body 3 are heavy, the mounting operation of the housing device 9 becomes very complicated. Therefore, in this embodiment, the valve body unit 8 shown in FIG. 5 can be assembled to the branch case body 1 in advance, thereby improving workability.

As shown in FIG. 5 , the valve body unit 8 is composed of the valve body 3 and a drive unit 81 . The drive unit 81 is a combination of the first and second wire rods 41 and 42, the worm wheel 52, the first and second spools 61 and 62 fixed to the rotary support shaft 52a of the worm wheel 52, and the support member 82. In this embodiment, a gear 53 is also included in the drive unit 81 and possibly also the first and second pulleys 71,72. The first and second spools 61 and 62 are supported by a support member 82 that is separate from the branch case body 1 . The support member 82 is formed of a bottomless case body that can accommodate the first and second spools 61 and 62 .

The valve body unit 8 can be assembled in advance, for example, at a factory. At this time, since there is no need to handle the branch case body 1, the work of connecting the first and second wires 41, 42 to the valve body 3 and adjusting their lengths can be easily performed. Then, as shown in FIG. 11, the valve body 3 and the drive unit 81 (that is, the first and second wires 41 and 42, the worm wheel 52, the first and second spools 61 and 62, and the support member 82) are assembled together. The combined valve body unit 8 is covered with (the second split case 12 of) the branch case body 1, and bolts 83, which are fasteners, are attached to the support member 82 from the outside of the branch case body 1, whereby the valve body unit 8 is assembled. is assembled to the branch case body 1.

The branch case body 1 has a through hole 16 in which the worm wheel 52 and the gear 53 are arranged, a support shaft cover portion 17 that covers the rotation support shaft 52a, and a spool cover portion 18 that covers the support member . A cover 55 is watertightly attached to the through hole 16 via a bolt 54 as a fixture (see FIG. 1). By operating the operating shaft 50 exposed from the cover 55, the valve body 3 can be rotated as described above. The bolt 83 is watertightly screwed into the mounting portion 82h (female threaded portion) of the support member 82 through the through hole of the spool cover portion 18 . By assembling the valve body unit 8 to the branch case body 1, the workability when attaching the housing device 9 to the water pipe K can be significantly improved.

A brief description will be given of the work of drilling the water pipe K using the uninterrupted water supply method. First, the first split case 11 and the second split case 12 are annularly connected so as to surround a part of the existing water pipe K, and the branch case body 1 is fitted onto the water pipe K. At that time, the divided portion 10 of the branch case body 1 is tightened with the fastener 15, and the end portion 2a of the connecting pipe 2 is sandwiched. In addition, by assembling the valve body unit 8 to the branch case body 1, the inside of the branch case body 1 can be opened in a state where the valve body 3 and the drive unit 81 are properly combined when the branch case body 1 is assembled. placed in

Next, a drilling machine (not shown) equipped with a hole saw is connected to the connecting pipe 2 . Then, a hole saw is inserted into the inside of the branch case body 1 through the connection pipe 2, and the pipe wall of the water pipe K is bored to form an opening 20 in an uninterrupted state. Needless to say, the operating portion 5 is operated to keep the valve body 3 away from the end portion 2a of the connection pipe 2 so that the valve body 3 does not interfere with the hole saw. After boring is completed, the hole saw is pulled back together with the cut piece, and the valve body 3 is rotated by the operating portion 5 to close the end portion 2a of the connecting pipe 2. As shown in FIG. After that, the hole saw is removed from the connecting pipe 2, and a cover and a branch pipe are connected to the connecting pipe 2 as required.

A branch flow path connecting the opening 20 and the connection pipe 2 is formed by the above construction. The branch flow path is switched between a water passing state and a water stopping state according to the rotation operation of the valve body 3 . Thus, the valve body 3 can be used in place of a conventional working gate valve in the uninterrupted water branch construction method. When water is stopped in the main flow path using the branch flow path, after removing the hole saw from the connecting pipe 2, an insertion machine (not shown) is connected, and the rubber lining portion is inserted into the water pipe K through the opening 20. A valve element capable of shutting off the water pipe K by compressing and deforming is installed in close contact with the inside of the pipe. It is also possible to remove the valve body 3 after stopping the water and reuse it in other construction work. Thus, the valve body 3 can be used in place of a conventional working valve in the uninterrupted water insert construction method.

In the above-described embodiment, an example in which the sealing material 31 is used to seal the space between the valve body 3 and the end portion 2a of the connecting pipe 2 is shown. 20 may be sealed. In that case, it is conceivable to attach a sealing material to the inner peripheral surface of the valve body 3 and seal the inner peripheral surface of the valve body 3 and the outer peripheral surface of the water pipe K with the sealing material. According to such a configuration, since water does not spread around the valve body 3 when the branch flow path is closed, concerns about water leakage are alleviated.

In the above-described embodiment, the gear 53 fixed to the rotary support shaft 52a is meshed with the meshing portion 35 of the valve body 3, thereby obtaining the water stop torque for pushing the valve body 3 to the final water stop position. However, it is not limited to this. Also, instead of or in addition to this, a torque applying mechanism using a screw piece 56 as shown in FIG. 12 may be adopted. In the example of FIG. 12, the threaded piece 56 is formed of a nut and is screwed onto a male threaded member 57 extending downward from the worm 51 . Since the branch case body 1 is provided with a cylindrical piece guide (not shown) surrounding the screw piece 56, the screw piece 56 does not rotate together with the male screw member 57 when it rotates.

The screw head 56 is configured to move up and down according to the rotation operation of the operation shaft 50 . More specifically, the screw head 56 rises when the operation shaft 50 is rotated in the direction of opening the branch flow path, and descends when the operation shaft 50 is rotated in the direction of closing the branch flow path. Then, in the final stage of closing the branch flow path, the threaded piece 56 comes into contact with the outer peripheral surface of the valve body 3 . By pressing the valve body 3 downward with the screw joint 56, a torque for pushing the valve body 3 into the final position is obtained. A protrusion 38 is formed on the outer peripheral surface of the valve body 3 so as to make surface contact with the screw piece 56 so that torque can be obtained efficiently.

In the above-described embodiment, an example is shown in which the first and second spools 61 and 62 are arranged at both ends of the branch case body 1 in the pipe axis direction, but the present invention is not limited to this. Therefore, for example, the configuration may be such that the first and second spools are arranged at one end or the central portion of the branch case body in the tube axial direction. It is also possible to place the first and second spools adjacent to the worm gear, or place the worm gear between the first and second spools. It can also be placed in a through hole in the body.

In the modification shown in FIG. 13, the valve body 3 is provided with an end guide 39 projecting in the pipe axis direction. In FIG. 13, (A) is a cross-sectional view viewed in the pipe circumferential direction showing the end of the valve body 3 in the pipe axial direction (that is, the end guide 39). (B) is a cross-sectional view of the end guide 39 of the valve body 3 as viewed in the direction of the tube axis, and corresponds to the cross-sectional view taken along line BB in (A). (C) and (D) are cross-sectional views of the end guide 39 of the valve body 3 at the final water stop position, as viewed in the direction of the tube axis. (C) shows the periphery of the divided portion 10, and (D) shows the periphery of the circumferential end portion E1 of the valve body 3. As shown in FIG.

As shown in FIG. 13A, on the inner surface of the branch case body 1, an outer wall surface 22 facing the end guide 39 from the outside in the pipe radial direction and an inner wall surface 23 facing from the inside in the pipe radial direction are formed. It is As shown in FIG. 13B, the outer wall surface 22 is provided with a protrusion 24 that protrudes toward the end of the valve body 3, and is configured to guide the valve body 3 from the outside in the pipe radial direction. there is The protrusion 24 has an overall rounded shape, for example, a hemispherical shape. The protrusions 24 are arranged at a plurality of locations in the pipe circumferential direction.

As shown in FIG. 13(C), in the divided portion 10 of the branch case body 1, an inner wall surface 23 is formed with an inclined surface 25 that inclines outward in the pipe radial direction toward the other side in the pipe circumferential direction (R2 direction). . In addition, the end guide 39 is formed with an inclined surface 39a which is inclined in the same direction as the inclined surface 25 and which can come into surface contact with each other. Thereby, when closing the branch flow path, the valve body 3 can be guided toward the branch pipe portion 1b (connection pipe 2). As shown in FIG. 13(D), the branch case body 1 is formed with a positioning portion 26 that can come into contact with the circumferential end portion E1 of the valve body 3 from the pipe circumferential direction. When closing the branch flow path, the valve body 3 may be rotated to the other side in the pipe circumferential direction (R2 direction) until the valve body 3 abuts on the positioning portion 26 .

In the above-described embodiment, an example in which the housing device is attached to the water pipe K as a ductile cast iron pipe was shown, but the present invention is not limited to this, and fluid pipes made of other materials such as steel pipes and PVC pipes are also targeted. can also

The housing device according to the present invention can be applied to water pipes, but is not limited to this, and can be widely applied to fluid pipes used for fluids such as various liquids and gases other than water.

The present invention is by no means limited to the above-described embodiments, and various modifications and improvements are possible without departing from the scope of the present invention. In addition, the plurality of modified examples described above can be employed in combination without particular restrictions.

1 branch case body 2 connecting pipe 3 valve body 4 wire rod 5 operation portion 8 valve body unit 9 housing device 20 opening 35 meshing portion 41 first wire rod 42 second wire rod 50 operating shaft 51 worm 52 worm wheel 52a rotating shaft 53 gear 61 First spool 62 Second spool 71 First pulley 72 Second pulley 81 Drive unit 82 Support member K Water pipe (an example of fluid pipe)

Claims (6)

a branch case body surrounding the outer peripheral surface of the fluid pipe in a sealed state;
a branch pipe portion provided in the branch case body and protruding in a pipe radial direction of the fluid pipe;
A branch that rotates along the pipe circumferential direction between the inner peripheral surface of the branch case body and the outer peripheral surface of the fluid pipe, and connects the opening provided in the pipe wall of the fluid pipe and the branch pipe portion. a valve element configured to be able to open and close the flow path;
a plurality of wires including a first wire and a second wire ;
an operation unit including a first spool and a second spool provided in the branch case body,
The first wire drawn out from the first spool is connected to a circumferential end portion of the valve body positioned below the opening when the branch flow path is closed,
The second wire drawn out from the second spool is connected to a circumferential end portion of the valve body positioned above the opening when the branch flow path is closed,
The valve body is configured to be rotatable in accordance with a winding operation of the wire rod by the operation unit , and the branch flow path is formed by rotating the first spool and winding the first wire rod. A casing device in which the valve body rotates in a direction to open and rotates the second spool to wind the second wire, thereby rotating the valve body in a direction to close the branch flow path . The operation unit includes an operation shaft having a worm and a worm wheel that meshes with the worm,
The first spool and the second spool are fixed to a rotating support shaft of the worm wheel,
By rotating the operating shaft in one direction, the first wire is wound on the first spool and the second wire is unwound from the second spool,
2. The casing device according to claim 1 , wherein the second wire is wound around the second spool and the first wire is fed out from the first spool by rotating the operating shaft in the other direction. 3. The housing device according to claim 2 , wherein the valve body has an uneven meshing portion that meshes with the worm wheel or a gear fixed to the rotary support shaft of the worm wheel in the final stage of closing the branch flow path. . A first pulley that turns back the first wire drawn out from the first spool and feeds it toward the valve body, and/or turns back the second wire that is drawn out from the second spool and turns it toward the valve body 4. The housing device according to any one of claims 1 to 3 , further comprising a second pulley for sending out by pressing the second pulley. The operation part is arranged in the central part of the branch case body in the pipe axis direction,
The housing device according to any one of claims 1 to 4 , wherein the first spool and the second spool are arranged at both ends of the branch case body in the pipe axis direction. The first spool and the second spool are supported by a support member configured as a separate member from the branch case body,
A valve body unit formed by combining the valve body, the first wire and the second wire , the first spool and the second spool, and the support member is covered with the branch case body, and the branch case body is exposed from the outside of the branch case body. The housing device according to any one of claims 1 to 5 , wherein the valve body unit is assembled to the branch case body by attaching a fixture to the support member.

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