JP2021017971A - Branch pipe connection member - Google Patents

Abstract

To provide a branch pipe connection member capable of being attached to a main pipe that is an attachment object of a branch pipe, without using a special jig or the like.SOLUTION: A branch pipe connection member 10 is used for connecting a branch pipe 5 to a main pipe 1. The branch pipe connection member 10 has: a branch pipe connection part 24 to which the branch pipe 5 is connected; an inner peripheral member 40 introduced inside the main pipe 1, and mounted on the inner peripheral side of the main pipe 1 at the peripheral part of an opening 3 drilled in the main pipe 1; an operating member 60 that enables a pulling operation of pulling the inner peripheral member 40 having been introduced inside the main pipe 1 in a direction close to an inner peripheral surface 9 by operation from the outside of the main pipe 1; and a positioning member 80 that positions the inner peripheral member 40 at a position where it is pulled by the pulling operation.SELECTED DRAWING: Figure 1

Description

The present invention relates to a branch pipe connecting member.

Conventionally, as a jig for constructing a branch pipe connecting member for connecting a branch pipe to an existing main pipe (main pipe) of a sewer or the like, for example, a jig for attaching a branch pipe in Patent Document 1 below. Is provided.

The branch pipe mounting jig of Patent Document 1 has an inner surface side locking member that can be locked to the inner surface side of the main pipe and an outer surface side of the main pipe with respect to the opening formed in the main pipe to be connected to the branch pipe. This is for assembling an outer surface side connecting member that can be connected to the inner surface side locking member to form a branch pipe portion to which a branch pipe can be connected. The branch pipe mounting jig of Patent Document 1 includes a branch pipe mounting jig body capable of temporarily holding an inner surface side locking member inside the main pipe when assembling to the main pipe.

Patent No. 5589844

Here, in the prior art, a jig for attaching a branch pipe disclosed in Patent Document 1 is used for attaching a branch pipe connecting member. However, in the prior art, it takes a considerable amount of time, effort, and labor to prepare jigs such as the above-mentioned branch pipe mounting jigs and to install them at predetermined locations using such jigs. Etc.

Therefore, an object of the present invention is to provide a branch pipe connecting member that can be attached to a main pipe to which a branch pipe is attached without using a special jig or the like.

(1) The branch pipe connecting member of the present invention provided to solve the above-mentioned problems is used for connecting a branch pipe to the main pipe, and has a branch pipe connecting portion to which the branch pipe is connected and a branch pipe connecting portion. An inner peripheral member introduced inside the main pipe and mounted on the inner peripheral side of the main pipe in a peripheral portion of an opening formed in the main pipe, and the inner peripheral member introduced inside the main pipe. An operating member that enables a pulling operation that pulls the inner peripheral member in a direction close to the inner peripheral surface by an operation from the outside of the main pipe, and a positioning member that positions the inner peripheral member at a position pulled by the pulling operation. It is characterized by having.

The branch pipe connecting member of the present invention is a pulling operation in which an inner peripheral member mounted on the inner peripheral side of the main pipe is introduced inside the main pipe and is pulled in a direction close to the inner peripheral surface by an operation by the operating member. Is supposed to be possible. Further, the branch pipe connecting member of the present invention includes a positioning member, and the inner peripheral member can be positioned at a position pulled by the pulling operation. As described above, the branch pipe connecting member of the present invention can position the inner peripheral member in a state close to the inner peripheral surface of the main pipe by the pulling operation from the outside of the main pipe. Therefore, according to the present invention, it is possible to provide a branch pipe connecting member that can be attached to a main pipe to which a branch pipe is to be attached without using a special jig or the like.

(2) In the branch pipe connecting member of the present invention described above, the inner peripheral member connects a plurality of abutting pieces abutting on the inner peripheral surface of the main pipe so as to be bendable and extendable. By bending the plurality of abutting pieces, a bent state can be introduced from the outside to the inside of the main through the opening of the main, and the plurality of abutting pieces are extended inside the main. As a result, an extension state that cannot be detached from the opening of the main pipe to the outside of the main pipe is obtained, and by pulling the operation member in the bent state, the inner peripheral member is brought close to the inner peripheral surface. However, it is preferable that the elongated state can be achieved.

In the branch pipe connecting member of the present invention, a plurality of contact pieces are connected by an inner peripheral member so as to be bendable and extendable. Further, the inner peripheral member can be made compact enough to be introduced into the main pipe through the opening provided in the main pipe by being bent. Therefore, the branch pipe connecting member of the present invention can easily and smoothly introduce the inner peripheral member into the main pipe.

Further, in the branch pipe connecting member of the present invention, the inner peripheral member is in a state in which a plurality of contact pieces are extended inside the main pipe so that the inner peripheral member cannot be detached from the opening of the main pipe to the outside of the main pipe (extended state). ) Can be. Further, by performing the pulling operation by the operating member, the inner peripheral member can be changed from the bent state to the extended state in the process of pulling the inner peripheral member to the inner peripheral portion of the main pipe. Therefore, in the branch pipe connecting member of the present invention, if the inner peripheral member is introduced into the main pipe and then pulled by the operating member, the inner peripheral member is placed on the inner peripheral portion of the main pipe so as not to be separated through the opening. Can be attached to.

(3) The branch pipe connecting member of the present invention described above has a connecting portion in which the inner peripheral member rotatably connects a plurality of the abutting pieces around a predetermined rotation axis, and the operation. It is preferable that the members are connected so that the operating force associated with the pulling operation acts at a position deviated from the rotation axis.

In the branch pipe connecting member of the present invention, a plurality of contact pieces forming the inner peripheral member are connected via a connecting portion so as to be rotatable about a predetermined rotation axis. Therefore, the contact piece can be rotated around the rotation axis by applying a pulling force to the contact piece at a position deviated from the rotation axis. In the present invention, the operating member is connected to the contact piece, and by performing the pulling operation, the operating force can be applied to the contact piece at a position deviated from the rotation axis. Therefore, in the branch pipe connecting member of the present invention, the contact piece can be rotated around the rotation axis and the state can be changed to the extended state by the pulling operation by the operating member.

(4) The branch pipe connecting member of the present invention described above has an outer peripheral member mounted on the outer peripheral side of the main pipe at a peripheral portion of an opening formed in the main pipe, and the operating member is composed of a wire rod. It is preferable that the wire rod is taken out through a hole provided in the outer peripheral member.

According to such a configuration, while the outer peripheral member is attached to the outer periphery of the main pipe, the pulling operation using the operating member can be performed without being hindered by the outer peripheral member. Therefore, according to the present invention, the work efficiency of the work of connecting the branch pipe to the main pipe can be further improved.

(5) In the branch pipe connecting member of the present invention described above, the branch pipe connecting portion has a tubular tubular portion integrally provided with the outer peripheral member, and the hole has the tubular shape. It is preferable that the part is provided at a position off the part.

According to such a configuration, the wire rod forming the operating member can be taken out from a position separated from the tubular portion forming the branch pipe connecting portion. Therefore, according to the above-described configuration, it is possible to prevent the wire rod from becoming an obstacle when the branch pipes are directly or indirectly connected at the branch pipe connecting portion. Therefore, according to the present invention, the workability of attaching the branch pipe to the main pipe can be further improved.

(6) The branch pipe connecting member of the present invention described above has an outer peripheral member mounted on the outer peripheral side of the main pipe at a peripheral portion of an opening formed in the main pipe, and the branch pipe connecting portion is the said. It has a tubular tubular portion that is integrally provided with the outer peripheral member, penetrates the outer peripheral member, and can be inserted into the opening formed in the main pipe, and the inner peripheral member has the tubular shape. It is preferable that the inner peripheral member opening has a size corresponding to the outer diameter of the portion, and the tubular portion can penetrate into the inner peripheral member opening.

In the branch pipe connecting member of the present invention, a tubular portion forming the branch pipe connecting portion is provided integrally with the outer peripheral member and penetrates the outer peripheral member. Further, the inner peripheral member is provided with an inner peripheral member opening having a size corresponding to the outer diameter of the tubular portion. Further, the tubular portion can be inserted into the opening formed in the main pipe and can penetrate into the opening of the inner peripheral member. Therefore, when the branch pipe connecting member of the present invention is attached to the main pipe, the outer peripheral member and the inner side are referred to the opening formed in the main pipe by penetrating the tubular portion into the opening of the inner peripheral member. The arrangement of the peripheral members can be adjusted with good positioning accuracy. Therefore, according to the branch pipe connecting member of the present invention, both the outer peripheral member and the inner peripheral member can be installed so as to surely cover from the inner peripheral side and the outer peripheral side in the peripheral portion of the opening formed in the main pipe. it can.

(7) In the branch pipe connecting member of the present invention described above, the operating member is formed in a loop shape, and the operating member is attracted by attracting the operating member in a direction intersecting the longitudinal direction of the main pipe. It is good if it can be operated.

According to such a configuration, for example, a tool such as a crowbar or a rod-shaped member at a construction site for attaching a branch pipe to the main pipe is inserted into a loop-shaped operating member and pierced to the side of the main pipe. After that, the operation member can be pulled by performing the operation of tilting. As described above, according to the above-described configuration, the branch pipe connecting member can be installed on the main pipe by utilizing a tool such as a crowbar at the installation construction site as an auxiliary tool for the pulling operation. Therefore, according to the present invention, it is possible to make the work of attaching the branch pipe connecting member to the main pipe even easier.

According to the present invention, it is possible to provide a branch pipe connecting member that can be attached to a main pipe to which a branch pipe is attached without using a special jig or the like.

It is a perspective view which shows the state which connected the branch pipe to the main pipe by using the branch pipe connecting member which concerns on one Embodiment of this invention. It is a side view which shows the state which connected the branch pipe to the main pipe by using the branch pipe connecting member which concerns on one Embodiment of this invention. It is sectional drawing which showed stepwise the method of connecting a branch pipe to a main pipe by using the branch pipe connecting member which concerns on one Embodiment of this invention. (A) is a plan view in the first step of attaching the branch pipe connecting member shown in FIG. 1 to the main pipe, and (b) is a plan view in the second stage. It is a perspective view which shows the state of the branch pipe connecting member in the 1st step of attaching the branch pipe connecting member shown in FIG. 1 to a main pipe. It is a perspective view which shows the state of the branch pipe connecting member in the 2nd step of attaching the branch pipe connecting member shown in FIG. 1 to a main pipe.

Hereinafter, the branch pipe connecting member 10 according to the embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the expressions such as up / down / left / right, front / back, front / back, etc. are based on the state in which the branch pipe connecting member 10 is attached to the main pipe 1 as shown in FIG. 1 unless otherwise specified. It is explained as. Further, in the following description, first, the configuration of the branch pipe connecting member 10 will be described, and then a construction method of connecting the branch pipe 5 to the main pipe 1 by using the branch pipe connecting member 10 will be described.

<< About the configuration of the branch pipe connecting member 10 >>
The branch pipe connecting member 10 is used to connect the branch pipe 5 to an opening 3 newly formed by drilling an existing main pipe 1 such as a sewer pipe. The main pipe 1 can be, for example, a concrete pipe, a hume pipe, a resin pipe made of a resin such as vinyl chloride, or the like. As shown in FIGS. 1 to 3, the branch pipe connecting member 10 includes an outer peripheral member 20, an inner peripheral member 40, an operating member 60, and a positioning member 80 (in FIG. 1, the operating member 60 and the positioning member). 80 is not shown and omitted).

The outer peripheral member 20 is a member mounted on the outer peripheral surface 7 of the main pipe 1 at the peripheral portion of the opening 3 drilled in the main pipe 1. The outer peripheral member 20 includes an outer peripheral contact portion 22, a branch pipe connecting portion 24, and a plurality of (four in this embodiment) holes 26.

The outer peripheral contact portion 22 is a portion attached so as to contact the outer peripheral surface 7 of the main pipe 1. The outer peripheral contact portion 22 is a member having an arcuate cross-sectional shape curved with the same curvature as the outer peripheral surface 7 and having a substantially rectangular shape in a plan view. The outer peripheral contact portion 22 has a predetermined length in the longitudinal direction (generatrix direction), and is provided with a through hole 30 provided at a substantially central portion in the longitudinal direction so as to penetrate from the front surface 22a to the back surface 22b. There is.

The branch pipe connecting portion 24 is a portion to which the branch pipe 5 is connected. The branch pipe connecting portion 24 has a tubular portion 32 and a receiving portion 34. The tubular portion 32 has a tubular shape penetrating in the axial direction, and is provided integrally with the outer peripheral contact portion 22. The tubular portion 32 projects to both the front surface 22a side and the back surface 22b side through the through hole 30 provided in the outer peripheral contact portion 22.

In the tubular portion 32, the portion protruding toward the back surface 22b (hereinafter, also referred to as “inner tubular portion 32a”) is the opening 3 of the main pipe 1 and the inner peripheral member opening 48 of the inner peripheral member 40 described in detail later. Is penetrated into. Further, a receiving portion 34 is provided in a portion of the tubular portion 32 that protrudes toward the surface 22a (hereinafter, also referred to as “outer tubular portion 32b”). The receiving portion 34 is a portion that functions as a receiving portion when the branch pipe 5 is connected.

The hole 26 is provided to take out the wire rod forming the operating member 60, which will be described in detail later. The hole 26 is provided on the outer peripheral side of the tubular portion 32. The holes 26 are formed so as to penetrate the front surface 22a and the back surface 22b of the outer peripheral contact portion 22.

The inner peripheral member 40 is a member introduced into the main pipe 1 and mounted on the inner peripheral surface 9 of the main pipe 1 at the peripheral portion of the opening 3 drilled in the main pipe 1. The inner peripheral member 40 includes a contact piece 42 and a connecting portion 44. The inner peripheral member 40 is formed by connecting a plurality of (two in the present embodiment) contact pieces 42, 42 so as to be bendable and extendable via a connecting portion 44.

The contact piece 42 is a member having an arcuate cross-sectional shape curved with a curvature equivalent to that of the inner peripheral surface 9 of the main pipe 1 and having a substantially rectangular shape in a plan view. The contact piece 42 has a predetermined length in the longitudinal direction (generatrix direction). The abutting pieces 42 are connected so as to be rotatable with each other in a state of being arranged in parallel via a connecting portion 44 described in detail later.

By rotating the inner peripheral member 40 so that the back surfaces of the adjacent contact pieces 42, 42 are separated from each other, the adjacent contact pieces 42, 42 are butted against each other, and the front surfaces are in a continuous state. As a result, the inner peripheral member 40 is in an elongated state (extended state) as a whole. The contact piece 42 has a portion (matching portion 42x) that is abutted with another adjacent contact piece 42 in the extended state. Further, when the inner peripheral member 40 is extended, the inner peripheral member 40 is expanded so as not to be detached from the opening 3 of the main pipe 1 to the outside of the main pipe 1. Further, the inner peripheral member 40 can be brought into a bent state (deformed state) by folding the connecting portions 44 so that the back surfaces of the adjacent contact pieces 42, 42 are close to each other. When the inner peripheral member 40 is in the bent state, it becomes a compact state so that it can be introduced from the outside to the inside of the main pipe 1 through the opening 3 of the main pipe 1.

The abutting pieces 42 and 42 have notches 46 and 46 at substantially the center in the longitudinal direction (generatrix direction) on the mating portions 42x and 42x, respectively. The cutouts 46 and 46 are semicircular, respectively. When the inner peripheral member 40 is in the extended state, the inner peripheral member opening 48 composed of a combination of the cutout portions 46 and 46 and opened in a substantially circular shape is formed. The opening diameter of the inner peripheral member opening 48 is set to a size corresponding to the outer diameter of the inner tubular portion 32a protruding toward the back surface 22b in the tubular portion 32 of the outer peripheral member 20. Therefore, the inner peripheral member opening 48 can penetrate the inner tubular portion 32a of the tubular portion 32.

The connecting portion 44 rotatably connects a plurality of (two in the present embodiment) contact pieces 42 around a predetermined rotation axis C extending in the generatrix direction of the contact piece 42. The connecting portion 44 may be, for example, one in which a shaft portion is provided on one of the adjacent contact pieces 42, 42 and a receiving portion that rotatably supports the shaft portion on the other side. In this embodiment, the connecting portion 44 is configured by a hinge. The rotation axis C exists at a position on the side of the mating portions 42x and 42x forming the boundary between the contact pieces 42 and 42 arranged side by side.

The operation member 60 brings the inner peripheral member 40 introduced inside the main pipe 1 closer to the inner peripheral surface 9 of the main pipe 1 by operating the inner peripheral member 40 from the outside of the main pipe 1 (pulling operation). It is a member for pulling in a direction. The operation member 60 is made of a wire rod formed of a material such as metal or resin. In the present embodiment, as the operating member 60, the first operating member 60a connected to one of the contact pieces 42 and 42 (hereinafter, also referred to as “first contact piece 42a”) and the other (hereinafter, “first”. A second operating member 60b connected to (also referred to as "two contact pieces 42b") is provided.

The first operating member 60a and the second operating member 60b forming the operating member 60 are attracted to each other at positions deviated from the rotation axis C of the first contact piece 42a and the second contact piece 42b forming the inner peripheral member 40, respectively. It is connected so that the operating force associated with the operation acts.

Specifically, the ends on one end side and the other end side of the first operating member 60a are inserted from the front surface 22a of the outer peripheral member 20 toward the back surface 22b through the holes 26 and 26 provided in the outer peripheral member 20, respectively. Has been done. The holes 26 and 26 into which the first operating member 60a is inserted are selected so as to be provided at positions of the outer peripheral member 20 facing the second contact piece 42b of the inner peripheral member 40, respectively. Further, the ends on one end side and the other end side of the first operating member 60a are positioned on one side in the circumferential direction and on the other side in the semicircular notch 46 provided in the first contact piece 42a. It is fixed to. Both ends of the first operating member 60a are fixed at substantially symmetrical fixed positions in the longitudinal direction of the first contact piece 42a. The first operating member 60a (operating member 60) is formed in a loop shape by fixing both ends to the first contact piece 42a in this way.

Similarly, the ends on one end side and the other end side of the second operating member 60b are inserted from the front surface 22a of the outer peripheral member 20 toward the back surface 22b through the holes 26 and 26 provided in the outer peripheral member 20, respectively. There is. The holes 26 and 26 into which the second operating member 60b is inserted are selected so as to be provided at positions of the outer peripheral member 20 facing the first contact piece 42a of the inner peripheral member 40, respectively. Further, the ends on one end side and the other end side of the second operating member 60b are located on one side in the circumferential direction and on the other side in the semicircular notch 46 provided in the second contact piece 42b, respectively. It is fixed in position. Both ends of the second operating member 60b are fixed at fixed positions that are substantially symmetrical in the longitudinal direction of the second contact piece 42b. The second operating member 60b (operating member 60) is formed in a loop shape by fixing both ends to the second contact piece 42b in this way.

The first operating member 60a and the second operating member 60b are arranged as described above. Therefore, the first operating member 60a and the second operating member 60b are crossed at two locations on the surface 22a side of the outer peripheral member 20 on one side and the other side in the longitudinal direction (bus line direction) of the outer peripheral member 20 via the tubular portion 32. It is said that it is arranged. Therefore, the operation of pulling the first contact piece 42a and the second contact piece 42b by the operation of pulling the first operation member 60a and the second operation member 60b (pulling operation) is performed by the first operation member 60a and the second operation member 60b. Can be done by pulling toward the side of the main pipe 1.

The positioning member 80 is for positioning the first contact piece 42a and the second contact piece 42b forming the inner peripheral member 40 so as not to return from the position attracted by the operating member 60 in the direction opposite to the attracting direction. It is a thing. The positioning member 80 is provided at a position where the first operating member 60a and the second operating member 60b forming the operating member 60 cross each other on the surface 22a side of the outer peripheral member 20. Specifically, the positioning member 80 is capable of inserting the first operating member 60a and the second operating member 60b. For example, it is provided with a mechanism such as a ratchet mechanism that can limit the operating direction of the first operating member 60a and the second operating member 60b to one side. Therefore, the first operating member 60a and the second operating member 60b can be pulled by the pulling operation, but do not return in the opposite direction unless the above-mentioned mechanism is released. Therefore, the positioning member 80 can position the first contact piece 42a and the second contact piece 42b at the pulling position.

<< About the construction method using the branch pipe connecting member 10 >>
Subsequently, a construction method for connecting the branch pipe 5 to the opening 3 drilled in the main pipe 1 by using the branch pipe connecting member 10 will be described.

As shown in FIG. 5, when the branch pipe 5 is connected to the main pipe 1, the operation member 60 of the branch pipe connecting member 10 has not yet been attracted, and the outer peripheral member 20 and the inner peripheral member 40 are sufficiently separated from each other. It is prepared in a fresh state. In this state, the contact pieces 42, 42 forming the inner peripheral member 40 are bent at the connecting portion 44 to be in a folded state (deformed state). As shown by the solid line in FIG. 3, the inner peripheral member 40 is introduced into the inside through the opening 3 of the main pipe 1 in a deformed state.

When the inner peripheral member 40 is introduced into the main pipe 1 as described above, as shown by the arrow (1) in FIG. 3, the cylinder of the branch pipe connecting portion 24 integrally provided with the outer peripheral member 20. The shape portion 32 is inserted into the opening 3 of the main pipe 1 with the inner tubular portion 32a at the head. Further, the outer peripheral member 20 is arranged so that the outer peripheral contact portion 22 is along the outer peripheral surface 7 of the main pipe 1.

When the arrangement of the outer peripheral member 20 is completed in this way, as shown in FIG. 4A, the first operating member 60a and the second operating member 60b are directed outward in the width direction (diameter direction) of the main pipe 1. Arranged so that it can be pulled. In this state, as shown by the arrows (2) in FIG. 3 and the arrows in FIG. 4 (b), the first operating member 60a and the second operating member 60b arranged on the side of the tubular portion 32 are connected to the main pipe 1. An operation of pulling from the inside to the outside (pulling operation) is performed. Along with this, as shown in FIG. 6, the inner peripheral members 40 (first contact piece 42a and second contact piece 42b) connected to the first operation member 60a and the second operation member 60b are connected to the main pipe 1. It is attracted to the inner peripheral surface 9 side of the main pipe 1 while changing its state from the deformed state to the extended state inside. When the inner peripheral member 40 is pulled until it comes into contact with the inner peripheral surface 9, the inner peripheral member 40 is in an extended state and is in close contact with the inner peripheral surface 9. As a result, the attachment of the branch pipe connecting member 10 to the main pipe 1 is completed. Further, when the branch pipe connecting member 10 is attached to the main pipe 1, the branch pipe 5 is inserted and connected to the receiving portion 34 of the branch pipe connecting portion 24. As a result, the installation of the branch pipe 5 to the main pipe 1 using the branch pipe connecting member 10 is completed.

As described above, in the branch pipe connecting member 10 of the present embodiment, after the inner peripheral member 40 is introduced inside the main pipe 1, the inner peripheral member 40 is pulled to the inner peripheral surface by the operating member 60. It can be arranged along 9. Further, since the branch pipe connecting member 10 includes the positioning member 80, the inner peripheral member 40 can be positioned in a state of being arranged along the inner peripheral surface 9. Therefore, the branch pipe connecting member 10 of the present embodiment can be attached to the main pipe 1 without using a special jig or the like.

As described above, in the branch pipe connecting member 10 of the present embodiment, a plurality of (two in the present embodiment) contact pieces 42 are connected as the inner peripheral member 40 so as to be bendable and extendable via the connecting portion 44. It is supposed to be. By bending the inner peripheral member 40, the inner peripheral member 40 can be deformed into a compact state so that it can be introduced into the main pipe 1 through the opening 3 provided in the main pipe 1. Therefore, when the branch pipe connecting member 10 is attached to the main pipe 1, the work of introducing the inner peripheral member 40 into the main pipe 1 through the opening 3 can be easily and smoothly performed.

As described above, the inner peripheral member 40 used in the branch pipe connecting member 10 is pulled toward the inner peripheral surface 9 by the operation of the main pipe 1 from the outside by the operating member 60. 40 can be changed from the bent state to the extended state. Further, the inner peripheral member 40 can be deformed into an extended state inside the main pipe 1. Further, when the inner peripheral member 40 is in the extended state, it becomes inseparable from the outside of the main pipe 1 through the opening 3. Therefore, the branch pipe connecting member 10 can be attached so that the inner peripheral member 40 does not separate from the opening 3 of the main pipe 1 by the operation by the operating member 60 outside the main pipe 1.

In the present embodiment, an example is shown in which the inner peripheral member 40 is deformed by the operation of the operating member 60 and can be flexed and extended, but the inner peripheral member 40 may have another configuration. For example, the inner peripheral member 40 may be a rod-shaped member (rod-shaped member) longer than the opening diameter of the opening 3. When such a rod-shaped member is used in place of the above-mentioned inner peripheral member 40, the rod-shaped member can be introduced into the main pipe 1 from the opening 3 by inclining the rod-shaped member. Further, if the operating member 60 is connected to the rod-shaped member and the connecting member 60 is pulled to move the rod-shaped member toward the inner peripheral surface 9 in a substantially horizontal posture inside the main pipe 1, the opening is opened. It is possible to prevent the rod-shaped member from being caught in the vicinity of the opening 3 and falling out of the opening 3. Therefore, even when a rod-shaped member is used as the inner peripheral member 40, the inner peripheral member 40 can be mounted so as not to separate from the opening 3 of the main pipe 1 as shown in the above embodiment. ..

As described above, in the branch pipe connecting member 10 of the present embodiment, the inner peripheral member 40 rotates a plurality of (two in the present embodiment) contact pieces 42, 42 in a predetermined manner via the connecting portion 44. It is said that they are connected so as to be rotatable around the axis C. Further, the first operating member 60a and the second operating member 60b forming the operating member 60 are connected to the contact pieces 42, 42 at positions deviated from the rotation axis C. Therefore, the branch pipe connecting member 10 can rotate the contact pieces 42 and 42 around the rotation axis C by performing a pulling operation by the operating member 60 to change the state from the deformed state to the extended state. it can.

In the present embodiment, since the inner peripheral member 40 is connected to the contact pieces 42, 42 so as to be rotatable, it is desirable to connect the operating member 60 to the position as described above. For example, when a rod-shaped member described above that does not rotate is used for the inner peripheral member 40, it is desirable to appropriately adjust the connection position of the operating member 60 with respect to the inner peripheral member 40. For example, when the rod-shaped member is used for the inner peripheral member 40, as described above, the rod-shaped member is in a substantially horizontal posture inside the main pipe 1 so as not to come out of the opening 3. It is desirable to approach and abut. Therefore, in such a case, one end side and the other end side of the operation member 60 may be connected at positions symmetrical with each other in the longitudinal direction one side and the other side of the rod-shaped member, respectively.

Further, as described above, in the branch pipe connecting member 10 of the present embodiment, the wire rod forming the operating member 60 (first operating member 60a and second operating member 60b) is provided through a hole 26 provided in the outer peripheral member 20. Has been taken out. With such a configuration, even when the outer peripheral member 20 is attached to the outer periphery of the main pipe 1, the pulling operation can be performed by the operating member 60 without being hindered by the outer peripheral member 20.

In this embodiment, the operation member 60 (the first operation member 60a and the second operation member 60b) is made of a wire rod, and a configuration example is shown in which the positioning member 80 can be positioned and fixed. Instead, for example, a strap having serrations formed in a serrated shape such as a so-called binding band is provided on the inner peripheral member 40 side, and on the outer peripheral member 20 side, like the head portion of the binding band. A strap can be inserted and a claw that engages with the serration may be provided.

As described above, in the branch pipe connecting member 10 of the present embodiment, a hole 26 provided for inserting the operating member 60 is provided at a position outside the tubular portion 32 of the outer peripheral member 20. Therefore, in the branch pipe connecting member 10, the wire rod forming the operating member 60 does not get in the way when connecting the branch pipe 5, and the branch pipe 5 can be easily connected. In this embodiment, an example is shown in which a hole 26 for inserting a wire rod forming the operating member 60 is provided at a position outside the tubular portion 32. For example, the branch pipe connecting member 10 is provided in the main pipe 1. After installation, if it is possible to avoid obstructing the connection of the branch pipe 5 by cutting the operation member 60 before connecting the branch pipe 5, the operation member 60 is via the tubular portion 32. May be taken out to the outside.

As described above, in the branch pipe connecting member 10, the tubular portion 32 provided integrally with the outer peripheral member 20 can penetrate into the inner peripheral member opening 48 formed in the inner peripheral member 40. .. Therefore, when the branch pipe connecting member 10 is attached to the main pipe 1, the outer peripheral member is referred to the opening 3 formed in the main pipe 1 by penetrating the tubular portion 32 into the inner peripheral member opening 48. The arrangement of the 20 and the inner peripheral member 40 can be adjusted with good positioning accuracy. Therefore, according to the branch pipe connecting member 10, both the outer peripheral member 20 and the inner peripheral member 40 can be installed so as to surely cover the outer peripheral side and the outer peripheral side in the peripheral portion of the opening 3.

In this embodiment, an example is shown in which the portion of the tubular portion 32 integrated with the outer peripheral member 20 that protrudes toward the back surface 22b can be penetrated into the inner peripheral member opening 48 of the inner peripheral member 40. For example, the tubular portion 32 may protrude only toward the surface 22a of the outer peripheral member 20 and may not be able to penetrate the inner peripheral member opening 48. Further, instead of projecting the inner tubular portion 32a of the tubular portion 32 toward the back surface 22b side, another protruding portion that can be engaged with the inner peripheral member opening 48 of the inner peripheral member 40 may be provided, or the inner tubular portion 32a may be provided. Alternatively, the inner peripheral member 40 to which one or both of the above-mentioned protruding portions can be engaged may be provided separately from the inner peripheral member opening 48.

As described above, in the branch pipe connecting member 10, the operating members 60 (the first operating member 60a and the second operating member 60b) are formed in a loop shape, and the directions intersect with respect to the longitudinal direction of the main pipe 1. By pulling the operation member 60 toward (the radial outside of the main pipe 1), the pulling operation is possible. Therefore, for example, while inserting a tool such as a crowbar or a rod-shaped member at the installation site of the branch pipe 5 to the main pipe 1 through the operation member 60 formed in a loop shape, the tip portion of the crowbar or the like is inserted into the main pipe. The operation member 60 can be pulled by performing an operation such as piercing the ground on the side of the pipe 1 and then tilting the main pipe 1 outward in the radial direction. By doing so, it becomes possible to utilize a tool such as a crowbar at the installation construction site as an auxiliary tool for the pulling operation, and the work of attaching the branch pipe connecting member 10 to the main pipe 1 can be performed more easily. become. In the present embodiment, an example in which the wire rod forming the operating member 60 is formed in a loop shape is shown, but the operating member 60 does not necessarily have to be in a loop shape.

The present invention can be suitably used for connecting a branch pipe to a main pipe in various pipes such as a water pipe, a sewage pipe, and a drain pipe.

1: Main pipe 3: Opening 5: Branch pipe 9: Inner peripheral surface 10: Branch pipe connecting member 20: Outer peripheral member 24: Branch pipe connecting part 26: Hole 32: Cylindrical part 40: Inner peripheral member 42: Contact piece 44: Connecting part 48: Inner peripheral member opening 60: Operating member 80: Positioning member C: Rotating axis

Claims (7)

A branch pipe connecting member used to connect a branch pipe to the main pipe.
The branch pipe connection part to which the branch pipe is connected and
An inner peripheral member introduced into the main pipe and mounted on the inner peripheral side of the main pipe at a peripheral portion of an opening formed in the main pipe.
An operating member that enables a pulling operation of pulling the inner peripheral member introduced inside the main pipe in a direction close to the inner peripheral surface of the main pipe by an operation from the outside of the main pipe.
A branch pipe connecting member comprising a positioning member for positioning the inner peripheral member at a position pulled by the pulling operation. The inner peripheral member
A plurality of contact pieces abutting on the inner peripheral surface of the main pipe are connected so as to be bendable and extendable, and by bending the plurality of contact pieces, the contact pieces are bent through the opening of the main pipe. A bent state that can be introduced from the outside to the inside of the main, and by extending a plurality of the contact pieces inside the main, an extended state that cannot be detached from the opening of the main to the outside of the main. To be
The branch pipe connecting member according to claim 1, wherein by pulling the operating member in the bent state, the inner peripheral member can be brought into the extended state while being brought close to the inner peripheral surface. The inner peripheral member
It has a connecting portion that rotatably connects a plurality of the abutting pieces around a predetermined rotation axis.
The branch pipe connecting member according to claim 2, wherein the operating member is connected so that an operating force associated with the pulling operation acts at a position deviated from the rotation axis. It has an outer peripheral member mounted on the outer peripheral side of the main at the periphery of the opening drilled in the main.
The operating member is composed of a wire rod.
The branch pipe connecting member according to any one of claims 1 to 3, wherein the wire rod is taken out through a hole provided in the outer peripheral member. The branch pipe connecting portion has a tubular tubular portion integrally provided with the outer peripheral member.
The branch pipe connecting member according to claim 4, wherein the hole is provided at a position outside the tubular portion. It has an outer peripheral member mounted on the outer peripheral side of the main at the periphery of the opening drilled in the main.
The branch pipe connecting portion is provided integrally with the outer peripheral member, has a tubular tubular portion that penetrates the outer peripheral member and can be inserted into the opening formed in the main pipe.
The inner peripheral member has an inner peripheral member opening having a size corresponding to the outer diameter of the tubular portion.
The branch pipe connecting member according to any one of claims 1 to 5, wherein the tubular portion can be penetrated into the inner peripheral member opening. The operating member is formed in a loop shape.
The branch pipe connecting member according to any one of claims 1 to 6, wherein the pulling operation can be performed by pulling the operating member in a direction intersecting the longitudinal direction of the main pipe.

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