JP7253605B2 - occlusion device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closing device that is introduced into a fluid pipe in an uninterrupted state from a branched portion side of the fluid pipe to temporarily block the fluid inside the fluid pipe.

A conventional closing device is used, for example, when relocating a fluid pipe such as a water supply pipe or a gas pipe, and a bag connected to one end of a rubber hose in a contracted state is branched from the fluid pipe using an introduction device. After the fluid is introduced into the inside of the fluid pipe from the branch part side in an uninterrupted state, the fluid such as water or air is sent from the other end of the hose to inflate the bag, thereby closing the flow path inside the fluid pipe and causing the fluid to flow. is temporarily blocked.

In the water stop device bag (closure device) disclosed in Patent Document 1, one end of the hose is connected to the mounting opening of the bag body, and the bag body side is attached to the mouthpiece attached to the other end of the hose. By providing a hose bending prevention pipe that expands toward the direction, even if the bag body expanded inside the fluid pipe is pushed downstream of the fluid pipe by the pressure of the fluid flowing through the fluid pipe, the hose bending prevention pipe The hose bends gently along the slope inside the pipe, and it is possible to prevent the hose from being damaged or cut due to sudden bending.

Japanese Utility Model Laid-Open No. 6-12896 (page 5, FIG. 2)

However, in Patent Document 1, the bag body inflated inside the fluid pipe is pushed downstream of the fluid pipe by the pressure of the fluid flowing through the fluid pipe, thereby pulling the hose downstream and causing excessive tension. There is a problem that the hose may be damaged due to the action of force.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a closing device capable of reducing the tensile force acting on a hose connected to a bag.

In order to solve the above problems, the occlusive device of the present invention includes:
A hose to which a fluid can be introduced from one end, and a bag connected to the other end of the hose and inflatable by the pressure of the fluid are provided. A closing device that is introduced into a fluid pipe in an uninterrupted state and expands the bag to close the inside of the fluid pipe,
It is characterized by comprising a protective member that connects a connection member that connects the hose and the bag and a tip portion of the introduction device.
According to this feature, since the connection member that connects the hose and the bag and the tip of the introduction device that introduces the bag into the fluid pipe from the branch are connected by the protection member, the fluid pipe expands inside the fluid pipe. Since the protective member can receive the tensile force acting on the hose when the bag is pushed downstream of the fluid pipe by the flow and pressure of the fluid in the fluid pipe, the tensile force acting on the hose connected to the bag can be reduced.

The protective member is characterized by comprising a plate-like member that is pivotally supported by the distal end portion of the connection member and the introduction device, respectively.
According to this feature, the connection member and the distal end portion of the introduction device are connected by the plate-shaped member, so that the relative distance between the connection member and the distal end portion of the introduction device is substantially constant, and the plate-shaped member are pivotally supported by the connecting member and the distal end of the introduction device, respectively, so that the plate member can be rotated with respect to the connecting member and the distal end of the introduction device, respectively, and the closing device can be bent. Only stress in the bending direction can be applied without applying tensile force.

At least two of the plate members are provided facing each other with the hose interposed therebetween.
According to this feature, since both sides of the hose in the bending direction can be protected by at least two opposing plate-like members, damage to the hose can be prevented.

A pair of the plate members are provided with the hose interposed therebetween, and are wider than the hose.
According to this feature, the pair of plate-like members sandwiching the hose and being wider than the hose can secure a space formed between the pair of plate-like members when the closing device is bent. Moreover, since the wide plate-like member can prevent the hose from protruding, the hose can be easily protected by the plate-like member.

The connecting member is characterized by including a restricting portion that restricts rotation of the plate-shaped member.
According to this feature, since the connection member that connects the hose and the bag is provided with the restriction portion that restricts the rotation of the plate-like member, when the introduction device introduces the bag into the fluid pipe from the branch portion side, It is possible to provide an occlusion device that bends in only one direction of the fluid line.

The bag is detachable from the connection member.
This feature allows repeated use of the closure device by replacing the bag that is detachable from the connecting member.

A deformable cover member is provided between the connection member and the distal end of the introduction device.
According to this feature, the cover member does not interfere with the bending of the closing device, and the hose can be protected in the circumferential direction.

1 is a cross-sectional front view of a fluid line with an exemplary closure device attached; FIG. FIG. 10 is a side cross-sectional view showing a fluid line with a closure device attached; FIG. 4 is a front view showing the connection of the bag to the closure device; (a) is a front view showing the structure of the closing device, (b) is a side view of the same, and (c) is a cross-sectional side view of the same. FIG. 11 is a perspective view showing a state in which the closure device is bent; FIG. 10 is a side cross-sectional view showing a step of introducing the bag of the closure device into the inside of the fluid tube from the bifurcation side; FIG. 7 is a side cross-sectional view showing the step of introducing the bag of the closure device further from FIG. 6; FIG. 8 is a side sectional view showing the step of introducing the bag of the closure device further from FIG. 7; FIG. 9 is a side cross-sectional view showing the step of introducing the bag of the closure device further from FIG. 8; FIG. 4 is a side cross-sectional view showing the bag of the closure device being inflated and the interior of the fluid tube closed. (a) is a partially sectioned front view showing a cover member attached to the closure device, and (b) is a partially sectioned side view of the same. (a) is a front view showing Modification 1 of the closure device, and (b) is a side view of the same. (a) is a partial cross-sectional front view showing Modification 2 of the closing device, and (b) is a partial cross-sectional side view of the same. (a) is a partially sectioned front view showing Modification 3 of the closing device, and (b) is a partially sectioned side view of the same.

A mode for carrying out the closure device according to the present invention will be described below based on an embodiment. For convenience of explanation, the left side of the paper surface of FIG. 2 is the upstream side of the fluid pipe, and the right side is the downstream side.

An occluding device according to an embodiment will be described with reference to FIGS. 1 to 10. FIG. First, with reference to FIGS. 1 to 5, the configuration of the fluid pipe, the introduction device, and the closure device, and the details of the structure of each part will be described. Subsequently, with reference to FIGS. The process of closing the pipe will be described.

An existing fluid pipe 1 (hereinafter simply referred to as "fluid pipe 1") used as water supply is buried in the ground, and a plurality of branch pipes (not shown) are connected to the fluid pipe 1, respectively. are installed in each home and facility.

As shown in FIG. 1, the fluid pipe 1 is made of ductile cast iron, has a substantially circular cross-sectional shape, and has an inner peripheral surface covered with an epoxy resin layer. In addition, the fluid pipe according to the present invention may be made of metal such as cast iron or steel, or may be made of concrete, vinyl chloride, polyethylene, polyolefin, or the like. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the epoxy resin layer, and may be coated with, for example, mortar or the like, or the inner peripheral surface of the fluid pipe may be coated with a suitable material by powder coating. Also, the materials of the housing 3, the short pipe 4, the introduction pipe 51, etc., which will be described later, may also conform to the above.

The closure device 2 of the present invention branches off from the fluid pipe 1 in consideration of the convenience of the supply area when a predetermined section of the fluid pipe 1 is removed temporarily or permanently due to problems such as deterioration over time. It is introduced into the inside of the fluid pipe 1 in an uninterrupted state from the side of the branch portion 3a, and is used to temporarily shut off the fluid in the fluid pipe 1. As shown in FIG. In this embodiment, the fluid in the fluid pipe is tap water, but it is not limited to tap water in this embodiment. It doesn't matter if there is.

First, the configuration of the fluid tube 1 and the structure of each part will be described. As shown in FIGS. 1 and 2, the fluid tube 1 is attached with a housing 3 that forms a branch portion 3a. More specifically, in this embodiment, the housing 3 has a structure in which it is divided into a first division housing 31 and a second division housing 32 in the radial direction of the fluid tube 1. These division housings 31, 32 are connected to each other to form openings 3b, 3b along the outer circumference of the fluid pipe 1, and are configured to be fitted onto the fluid pipe 1 in a sealed manner.

A branch portion 3a extending upward in a direction substantially perpendicular to the fluid pipe 1 extends from the first divided housing 31. The branch portion 3a is provided with an on-off valve device 30 capable of opening and closing the branch portion 3a. A short pipe 4 is attached via the . Further, at the tip of the short pipe 4, an introduction pipe 51 of an introduction device 5 for introducing a bag 22 of a closing device 2 (to be described later) that closes the inside of the fluid pipe 1 into the fluid pipe 1 in an uninterrupted state is attached. there is

Furthermore, a perforated portion 1a is formed at the top portion of the fluid pipe 1 to which the housing 3 is attached, and is formed by a perforated portion 1a by a perforator (not shown). 5 guide member 53 and closure device 2 can be introduced into the interior of fluid tube 1 .

In this embodiment, the first divided housing 31 constituting the upper part of the housing 3 and the second divided housing 32 constituting the lower part are used for explanation, but the division direction of the housing is not limited to the vertical direction. It may be in a horizontal direction or in a tilted direction at a predetermined angle. Also, the number of divisions may be three or more. Similarly, the piping direction of the fluid pipe 1 is not limited to horizontal, and may be, for example, vertical.

Next, the configuration of the introduction device 5 and the structure of each part will be described. As shown in FIGS. 1 and 2, the introduction device 5 includes an introduction pipe 51 attached to communicate with the above-described short pipe 4, and an introduction pipe 51 inserted into the introduction pipe 51 in a sealed manner, and from the branch portion 3a side. It is mainly composed of a shaft member 52 that can move back and forth toward the inside of the fluid pipe 1 and a guide member 53 that is fitted on the shaft member 52 in the introduction pipe 51 so as to be slidable in the axial direction. ing. The introduction pipe 51 is attached to the branch portion 3a of the housing 3 via the short pipe 4 and the on-off valve device 30, and when the on-off valve device 30 is open, the inside of the fluid pipe 1 is introduced through the perforated portion 1a. communicates with

More specifically, the introduction pipe 51 is provided with annular seal members 51b, 51b made of an elastic body along the inner circumference of an insertion port 51a formed on the upper end side, so that the shaft member 52 can be inserted into the insertion port. It is hermetically inserted into 51a and is slidable in the axial direction.

As shown in FIGS. 1 to 3, the shaft member 52 is a tubular body made of a cylindrical metal material that is inserted into the introduction pipe 51 through the insertion port 51a of the introduction pipe 51 (FIG. 4(c)). ), and the flow control valve 11 can be attached to and detached from the upper end portion 52 a of the shaft member 52 via the joint 10 . Further, a flow path is formed in the shaft member 52 through which the air supplied and discharged via the flow rate control valve 11 can pass. Further, a first connecting member 23 (a distal end portion of an introduction device), which will be described later, is attached to the lower end portion 52b of the shaft member 52 (see FIG. 4C). In this embodiment, the fluid that is supplied to and discharged from the flow path formed in the shaft member 52 is air. A fluid such as a liquid may be used.

Further, the shaft member 52 is provided with three arms 52c, 52c', 52c extending radially from the outer peripheral surface of the upper end portion 52a. By doing so, it is possible to move forward and backward in the introduction pipe 51 in the axial direction and to rotate around the axis. In this embodiment, the means for moving the shaft member 52 is manual operation using the arms 52c, 52c. The shaft member 52 may be moved back and forth using a hydraulic or other driving device without using the shaft member 52c.

The arms 52c, 52c', 52c are arranged on the upper end portion 52a of the shaft member 52 at intervals of approximately 90 degrees in the circumferential direction. extends in the same direction as the bending direction of the closing device 2, which will be described later, so that the shaft member 52 can be aligned in the circumferential direction with reference to the arm 52c'.

As shown in FIGS. 1 and 2, the guide member 53 is a cylindrical body made of a metal material that is fitted around the shaft member 52. At the lower end of the guide member 53, a wall portion 53a is partially notched. An opening 53b is formed to open. The opening 53b is configured such that its axial opening extension is approximately the same size as the diameter of the fluid tube 1 (see FIG. 6). In addition, the guide member 53 is not limited to being made of a metal material, and may be made of a resin material or the like.

Circular through holes 53c, 53c are formed in the wall portion 53a at positions facing the opening portion 53b. In addition, a plurality of elongated through holes 53d are formed in the wall portion 53a in the circumferential direction above the opening portion 53b. These through-holes 53d serve as flow paths for the fluid present in the introduction pipe 51 to flow inside and outside the guide member 53, so that the bag 22 of the closing device 2, which will be described later, can be easily moved back and forth within the guide member 53. It's becoming Further, the through holes 53c and 53d are connected to the mounting portion 30b communicating with the inside of the valve housing instead of the plug 30a of the on-off valve device 30 when the fluid pipe 1 is closed by the closing device 2, which will be described later. When the pipe is installed, it is configured as part of the bypass flow path.

A cap 54 having a flange portion formed on the upper end thereof is fitted to the upper end portion of the guide member 53, and is tightened against the wall portion 53a of the guide member 53 by a plurality of bolts 12. As shown in FIG. The cap 54 is formed with an insertion port 54b that penetrates in the axial direction, and annular seal members 54c, 54c made of an elastic body are provided on the inner periphery of the insertion port 54b. It is inserted into the guide member 53 in a sealed manner through the opening 53b of the guide member 53, and is slidable in the axial direction with respect to the insertion port 54b. are aligned in the opening direction of the

The shaft member 52 is not limited to being made of a metal material, and may be made of a resin material or the like. Low material is preferred.

Next, the configuration and structure of each part of the closing device 2 according to the present invention will be described. As shown in FIG. 3, the closing device 2 includes a rubber hose 21 into which fluid can be fed from one end, a bag 22 inflated by the fluid fed through the hose 21, and the above-described shaft member. 52, a second connection member 24 (connection member) that connects the hose 21 and the bag 22, and the first connection member 23 and the second connection member 24 are made relatively movable. and a protective member 25 to be connected.

One end of the hose 21 (the left side of the paper in FIG. 4C) is connected to a first joint 26 provided in the first connection member 23, and the other end (the right side of the paper in FIG. 4C) is connected to the second connection. It is connected to a second joint 27 provided within the member 24 . In addition, the hose 21 is connected to the first connecting member 23 and the second connecting member 24 by the first joint 26 and the second joint 27, respectively (see FIGS. 4A to 4C). .

The first joint 26 and the second joint 27 are provided with so-called bamboo shoot-shaped connection portions 26a and 27a, in which a plurality of return structures for preventing disconnection are provided on one end side to which the hose 21 is connected, and the connection portions 26a and 27a By inserting both ends of the hose 21 respectively, the hose 21 cannot be easily pulled out from the connecting portions 26a and 27a even if a tensile force acts on the hose 21 in the longitudinal direction. In addition, since the hose 21 can be attached to and detached from the connecting portions 26a and 27a of the first joint 26 and the second joint 27, when the hose 21 is damaged, the hose 21 can be replaced with a new hose 21 so that the closing device 2 can be operated repeatedly. It can be used, so the cost can be reduced.

As shown in FIG. 3, the bag 22 is provided with an opening 22a having a female thread (not shown). The bag 22 can be connected to the hose 21 via the second joint 27 by screwing it into the male threaded portion 27b provided on the right side). In addition, since the bag 22 is detachable from the male screw portion 27b of the second joint 27, the closure device 2 can be used repeatedly by replacing the bag 22 with a new bag 22 when the bag 22 is damaged. , can reduce costs. The attachment structure between the bag 22 and the second connection member 24 is not limited to the above. or a bayonet structure or a receptacle/insert structure.

As shown in FIG. 4(a), the protective member 25 is made of a metal material and is composed of a pair of opposing side plates 25a, 25a (plate-like members). The side plates 25a, 25a are wider than the outer diameter of the hose 21 (see FIG. 4(b)). The protective member 25 is not limited to being made of a metal material, and may be made of, for example, a high-strength resin material, as long as it has at least higher rigidity than the hose 21 .

As shown in FIG. 4(c), the first connecting member 23 is a substantially cylindrical body made of a metal material, and a stepped portion 23b is formed by partially expanding the inner peripheral portion 23a. , the flange portion 26c of the first joint 26 is engaged with the stepped portion 23b, and the fitting portion 26b provided on the other end side of the first joint 26 (on the left side of the paper surface of FIG. 4(c)). is tightly fitted into the opening 52d formed in the lower end 52b of the shaft member 52 described above, and tightened by a plurality of bolts 15 to the lower end 52b of the shaft member 52, whereby the first connection member 23 is connected to the lower end portion 52b of the shaft member 52 . In addition, the first connection member 23 is not limited to being made of a metal material, and may be made of a high-strength resin material or the like.

A pair of protruding plates 23c, 23c having a substantially semicircular shape when viewed from the side are provided on one end side of the first connecting member 23 (on the right side of the paper surface of FIGS. 4A to 4C), and these protruding plates 23c , 23c, shaft portions 23f, 23f projecting laterally are provided substantially concentrically. These shaft portions 23f, 23f are inserted through holes 25c, 25c formed in one end side of the side plates 25a, 25a of the protective member 25 (the left side of the paper surface of FIGS. 4(a) to 4(c)). , the protective member 25 is pivotally supported by the first connecting member 23 .

As shown in FIGS. 4A and 4B, the protruding plates 23c and 23c are provided with restricting portions 23d and 23d, respectively, which protrude in the thickness direction at positions on the outer peripheral side of the protective member 25 which bends as will be described later. formed. The restricting portions 23d, 23d are provided at positions substantially in contact with the outer peripheral edges of the side plates 25a, 25a pivotally supported by the projecting plates 23c, 23c. , the rotation of the protection member 25 with respect to the first connection member 23 toward the restriction portion 23d can be restricted.

As shown in FIG. 4(c), the second connecting member 24 is a substantially cylindrical body made of a metal material, and has an insertion opening 24a formed on one end side (on the right side of the paper surface of FIG. 4(c)). The externally threaded portion 27b of the second joint 27 is inserted into the second joint 27 and tightened against the flange portion 27c of the second joint 27 by bolts 16, 16. As shown in FIG. In addition, the second connection member 24 is not limited to being made of a metal material, and may be made of a high-strength resin material or the like.

A pair of protruding plates 24c, 24c having a substantially semicircular shape when viewed from the side are provided on the other end side of the second connecting member 24 (on the left side of the paper surface of FIGS. 4(a) to 4(c)). Axial portions 24f, 24f projecting laterally are provided substantially concentrically on the outer surfaces of 24c, 24c. These shaft portions 24f, 24f are inserted through holes 25d, 25d formed in the other end side of the side plates 25a, 25a of the protective member 25 (the right side of the paper surface of FIGS. 4(a) to 4(c)). Thus, the protection member 25 is pivotally supported by the second connection member 24 .

As shown in FIGS. 4A and 4B, the protruding plates 24c and 24c are provided with restricting portions 24d and 24d protruding in the thickness direction at positions on the outer peripheral side of the bent protective member 25, respectively. . The regulating portions 24d, 24d are provided at positions substantially in contact with the outer peripheral edges of the side plates 25a, 25a pivotally supported by the projecting plates 24c, 24c. , it is possible to restrict the rotation of the second connection member 24 with respect to the protection member 25 toward the restriction portion 24d.

Therefore, the flexing direction of the closing device 2 is restricted to one direction (the right direction in FIG. 9) by the restricting portions 23d and 24d provided on the first connecting member 23 and the second connecting member 24. As shown in FIG.

Further, in this embodiment, the bending direction of the closing device 2 is the direction toward the downstream side of the fluid tube 1 from the branch portion 3a. Furthermore, in this embodiment, the first connecting member 23 is connected to the lower end portion 52b of the shaft member 52 in a state in which the bending direction of the closing device 2 and the pointing direction of the arm 52c' provided on the shaft member 52 are aligned. ing.

As shown in FIG. 5, in the bent state of the closure device 2, the hose 21 connected between the first connecting member 23 and the second connecting member 24 remains almost unchanged in length and The inner diameter through which the air circulates is gently curved without being crushed. Further, the hose 21 is arranged inside the side plates 25a, 25a of the protective member 25, and both sides in the bending direction are protected by the side plates 25a, 25a wider than the hose 21 as described above. Although not shown, the side plates 25a and 25a of the protection member 25 and the connection plate connecting them form the protection member 25 in a substantially H-shape in front view, and the side opposite to the bending direction of the hose 21 ( upstream of the fluid tube 1) may be protected.

Next, the process of closing the fluid tube 1 using the closing device 2 will be described in detail. First, as shown in FIG. 2, the shaft member 52 having the non-inflated bag 22 at its tip is placed in the direction indicated by the arm 52c' with the opening 53b of the guide member 53 directed toward the downstream side of the fluid pipe 1. The shaft member 52 is advanced and moved downward by holding the arms 52c, 52c while being positioned in the circumferential direction so as to be open. At this time, the guide member 53 advances and moves downward together with the shaft member 52 , and the lower end of the wall portion 53 a of the guide member 53 comes into contact with the inner peripheral surface 1 b of the fluid pipe 1 , thereby advancing and moving the guide member 53 . ends (see FIG. 6). In addition, in a state in which the lower end of the wall portion 53a of the guide member 53 is in contact with the inner peripheral surface 1b of the fluid pipe 1, the fluid flows downstream of the fluid pipe 1 through the through holes 53c, 53c provided in the wall portion 53a. Therefore, work can be performed without interrupting the flow of the fluid in the pipe.

Next, as shown in FIG. 7, the shaft member 52 axially slides against the insertion opening 54b of the cap 54 of the guide member 53 that has finished advancing, and the closing device 2 is pushed into the wall of the guide member 53. As shown in FIG. It will move further downward in the portion 53a.

Next, as shown in FIG. 8, as the lower end of the bag 22 is pushed into the inner peripheral surface of the fluid pipe, a reaction force acts from the inner peripheral surface, thereby causing the protection member 25 to move to the second position. As the connection member 24 rotates downstream of the fluid pipe 1 , the rotation of the second connection member 24 is received, and the rotation of the protection member 25 relative to the first connection member 23 toward the downstream side of the fluid pipe 1 is promoted. , and the closure device 2 begins to gently bend downstream of the fluid tube 1 . Further, when the second connection member 24 to which the bag 22 is connected at the tip advances to the position of the opening 53b of the guide member 53, the outer surface of the non-inflated bag 22 receives the flow and pressure of the fluid of the fluid pipe 1. A force that pushes it downstream also acts, further promoting bending. As described above, the restricting portions 23d and 24d restrict the upstream rotation of the protection member 25, so that the protection member 25 rotates only downstream. At this time, even if the protection member 25 is largely rotated toward the downstream side of the fluid pipe 1 with respect to the first connection member 23, the side plates 25a, 25a of the protection member 25, which are wider than the hose 21, are moved to the opening 53b. Therefore, the hose 21 arranged inside the side plates 25a, 25a of the protective member 25 is protected, and the hose 21 contacts the perforated portion 1a of the fluid pipe 1 and is damaged. You can avoid fear.

Next, as shown in FIG. 9, the shaft member 52 is advanced downward to a position where the upper end portion 52a of the shaft member 52 substantially abuts against the upper end surface of the introduction tube 51, thereby moving the closing device 2 to the advanced position. It can be aligned with the opening 53 b of the guide member 53 . It should be noted that the positioning of the advancing position of the closing device 2 may be performed based on a scale or the like provided on the shaft member 52 .

When the bag 22 is pushed in, a reaction force is generated from the inner peripheral surface of the fluid pipe 1, and the bag 22 receives the flow and pressure of the fluid in the fluid pipe 1 and is pushed downstream through the opening 53b. , the second connection member 24 rotates downstream with respect to the protection member 25 , and the protection member 25 rotates downstream with respect to the first connection member 23 , so that the closure device 2 moves downstream of the fluid pipe 1 . Bend sharply to the side. According to this, the bag 22 can be easily introduced into the inside (downstream side) of the fluid tube 1 from the side of the branch portion 3a by advancing and moving the shaft member 52 of the introduction device 5 downward.

Next, as shown in FIG. 10, the flow control valve 11 is attached to the joint 10 provided at the upper end portion 52a of the shaft member 52 in a state in which the closing device 2 is bent and the bag 22 is introduced into the interior of the fluid pipe 1. By connecting and supplying air, the bag 22 can be inflated by the air sent from the channel in the shaft member 52 and the hose 21, and the inside of the fluid pipe 1 can be closed to shut off the fluid.

In this manner, the closing device 2 includes the second connecting member 24 that connects the hose 21 and the bag 22, and the lower end of the shaft member 52 that constitutes the introduction device 5 that introduces the bag 22 into the fluid pipe 1 from the branch portion 3a. Since the first connection member 23 connected to the portion 52b is connected by the protection member 25, the bag 22 inflated inside the fluid pipe 1 is pushed out of the fluid pipe 1 by the flow and pressure of the fluid in the fluid pipe 1. Since the protective member 25 can receive the tensile force that acts when the hose 21 is washed downstream, the tensile force that acts on the hose 21 can be reduced. In particular, the bag 22, which is in the process of being inflated, sways to the left and right as its outer surface expands, and receives a greater amount of fluid flow and pressure in the fluid pipe 1. The tensile force acting on the hose 21 is greatly reduced, and air can be supplied to the bag 22 while the hose 21 is in a stable state. In addition, the bag 22 in the fully inflated state can resist the flow and pressure of the fluid due to the frictional force generated by the close contact between the outer surface of the bag 22 and the inner peripheral surface 1b of the fluid pipe 1. 21 stable states can be maintained.

Also, the first connection member 23 and the second connection member 24 are connected by the side plates 25a, 25a of the protection member 25, so that the relative distance between the first connection member 23 and the second connection member 24 is substantially constant. In addition, since the side plates 25a, 25a are pivotally supported by the first connecting member 23 and the second connecting member 24, respectively, the protective member 25 can be rotated with respect to the first connecting member 23 and the second connecting member 24, respectively. Therefore, only stress in the bending direction can be applied without applying a tensile force to the hose 21 .

In addition, since the protective member 25 can protect both sides of the hose 21 in the bending direction with the two facing side plates 25a, 25a, the hose 21 can be prevented from being damaged.

A pair of side plates 25a, 25a of the protective member 25 are provided with the hose 21 interposed therebetween, and are wider than the hose 21, so that when the closing device 2 is bent, the side plates 25a, 25a are formed between the pair of side plates 25a, 25a. The wide side plates 25a, 25a can prevent the hose 21 from protruding, so that the hose 21 can be easily protected by the side plates 25a, 25a.

In addition, the second connection member 24 that connects the hose 21 and the bag 22 is provided with the restriction portions 23d, 23d, 24d, and 24d that restrict the rotation of the side plates 25a and 25a of the protection member 25, so that the introduction device 5 can move the bag. It is possible to provide the closure device 2 that bends the fluid tube 1 only in one direction when the fluid tube 1 is introduced into the fluid tube 1 from the branch portion 3a side.

In addition to the closing device 2 described above, as shown in FIGS. 11(a) and 11(b), the outer peripheral portions of the first connecting member 23 and the second connecting member 24 are coated with non-woven fabric, high-strength resin, or the like. By attaching a cover member 61, which is a deformable, substantially cylindrical body, using caulking members 62, 62 or the like, the outer peripheries of the hose 21 and the protective member 25 are covered with the cover member 61. You may According to this configuration, the cover member 61 can protect the hose 21 arranged inside the protective member 25 over the circumferential direction without hindering the bending of the closing device 2 .

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions within the scope of the present invention are included in the present invention. be

For example, as a closing device 2' according to Modification 1 of the present invention, as shown in FIGS. Second restricting portions 23e, 23e projecting in the thickness direction are formed at positions facing the restricting portions 23d, 23d with the 25a interposed therebetween. The side plates 25a, 25a of the rotating protective member 25 are brought into contact with the second restricting portions 23e, 23e by providing the side plates 25a, 25a of the protective member 25 at positions spaced apart from the edges of the first connecting member 25a, 25a. 25 may be configured to limit the range of rotation thereof toward the second restricting portion 23e.

Further, second restricting portions 24e, 24e projecting in the thickness direction are formed at positions facing the restricting portions 24d, 24d with the side plates 25a, 25a of the protective member 25 sandwiched between the protruding plates 24c, 24c of the second connecting member 24, respectively. By providing the second restricting portions 24e, 24e at positions separated by a predetermined distance from the edges of the side plates 25a, 25a pivotally supported by the projecting plates 24c, 24c, the second restricting portions 24e, 24e are rotated. The side plates 25a, 25a of the protective member 25 may be brought into contact with each other to limit the range of rotation of the protective member 25 with respect to the second connecting member 24 toward the second restricting portion 24e.

According to this configuration, the closing device 2' can limit the range of bending angles by the second restricting portions 23e and 24e provided on the first connecting member 23 and the second connecting member 24, so that the protection member 25 is The hose 21 arranged inside the side plates 25a, 25a can be prevented from being sharply bent, and the flow path in the hose 21 can be secured in a state of being gently curved.

In addition, the formation positions of the second restricting portions in the first connection member and the second connection member are appropriately changed according to the angle of the branch portion with respect to the axial direction of the fluid pipe in order to limit the range of the bending angle of the closing device. It doesn't matter if it's something.

13(a), protective members 125, 125, . are connected to the first connection member 123 (tip of the introduction device) and the second connection member 124 (connection member) by welding or the like, so that the outer circumference of the hose 21 is protected by the protective members 125, 125, . In addition to being protective, the closure device 102 may be configured to be bendable. Further, as shown in FIG. 13(b), by providing a plate-like restricting portion 123d extending from the first connecting member 123 between the first connecting member 123 and the second connecting member 124, the bending of the closing device 102 is prevented. You may comprise so that a direction may be controlled.

Further, for example, as a closing device 202 according to Modified Example 3 of the present invention, as shown in FIG. The outer circumference of the hose 21 is protected by the protective member 225 by attaching the protective member 225, which is a bellows-shaped cylindrical body made of metal material, resin material, etc. In addition, the closure device 202 may be configured to be bendable. Further, as shown in FIG. 14(b), by providing a plate-like restricting portion 223d tightened to the first connecting member 223 with the bolt 17 between the first connecting member 223 and the second connecting member 224, It may be configured to regulate the bending direction of the closure device 202 .

1 Existing fluid pipe (fluid pipe)
2, 2' closing device 3 housing 3a branch 5 introduction device 21 hose 22 bag 22a opening 23 first connection member (tip of introduction device)
23d restriction portion 23e second restriction portion 24 second connection member (connection member)
24d regulating portion 24e second regulating portion 25 protective member 25a side plate (plate-shaped member)
26 First joint 27 Second joint 52 Shaft member 53 Guide member 53a Wall portion 53b Opening 61 Cover member 102 Closure device 123 First connection member (tip of introduction device)
123d restriction portion 124 second connection member (connection member)
125 protection member 202 closure device 223 first connection member (distal end of introduction device)
223d restriction portion 224 second connection member (connection member)
225 protective member

Claims (5)

A hose to which a fluid can be introduced from one end, and a bag connected to the other end of the hose and inflatable by the pressure of the fluid are provided. A closing device that is introduced into a fluid pipe in an uninterrupted state and expands the bag to close the inside of the fluid pipe,
The hose is configured to be detachable from a connecting member connecting the hose and the bag and a distal end portion of the introducing device, and a protective member connecting the connecting member and the distal end portion of the introducing device. The closure device according to claim 1, wherein the connection member or the distal end portion of the introduction device is provided with a restriction portion that restricts rotation of the protection member . 2. The closing device according to claim 1, wherein a connecting portion having a structure for preventing the hose from coming off is provided between the connecting member and the tip portion of the introducing device. 3. A closure device according to claim 1 or 2 , wherein the protective member is stiffer than the hose. 4. The closure device according to any one of claims 1 to 3 , wherein the bag is detachable with respect to the connection member. 5. An occlusion device according to any preceding claim, comprising a deformable cover member extending between the connecting member and the distal end of the introducer device.

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