JP7412913B2 - Branch pipe connection member - Google Patents

Description

The present invention relates to a branch pipe connecting member.

Conventionally, as a jig for constructing a branch pipe connection member for connecting a branch pipe to a main pipe (main pipe) of an existing sewerage system, etc., for example, a jig for installing a branch pipe as disclosed in Patent Document 1 below has been used. is provided.

The branch pipe installation jig of Patent Document 1 has an inner side locking member that can be locked on the inner side of the main pipe, and an inner side locking member on the outer side of the main pipe, with respect to an opening formed in the main pipe to which the branch pipe is connected. This is to form a branch pipe section to which a branch pipe can be connected by assembling the inner surface side locking member and the outer surface side connecting member connectable to the inner surface side locking member. The branch pipe attachment jig of Patent Document 1 includes a branch pipe attachment jig main body that can temporarily hold the inner side locking member inside the main pipe when it is assembled to the main pipe.

Patent No. 5859844

Here, in the prior art, something like the branch pipe attachment jig disclosed in Patent Document 1 is used for installing the branch pipe connection member. However, in the conventional technology, it takes a considerable amount of effort, time, and labor to prepare jigs such as the above-mentioned branch pipe installation jig and to install such jigs at predetermined locations. etc.

SUMMARY OF THE INVENTION 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 to be attached without using a special jig or the like.

(1) A branch pipe connection member of the present invention provided to solve the above-mentioned problems is used for connecting a branch pipe to a main pipe, and includes a branch pipe connection part to which the branch pipe is connected; an inner circumferential member introduced into the main pipe and attached to the inner circumferential side of the main pipe in a periphery of an opening bored in the main pipe; and an inner circumferential member introduced inside the main pipe. an operating member that enables a pulling operation to pull the inner circumferential member in a direction close to the inner circumferential surface by an operation from the outside of the main pipe; and a positioning member that positions the inner circumferential member at the pulled position by the pulling operation. It is characterized by having.

In the branch pipe connecting member of the present invention, the inner circumferential member attached to the inner circumferential side of the main pipe is brought into the inside of the main pipe, and the pulling operation is performed to pull the inner circumferential member in a direction close to the inner circumferential surface by operating the operating member. It is assumed that this can be done. Further, the branch pipe connecting member of the present invention includes a positioning member, and the inner circumferential member can be positioned at the position pulled by the pulling operation. In this manner, the branch pipe connecting member of the present invention allows the inner peripheral member to be positioned close to the inner peripheral surface of the main pipe by a pulling operation from outside 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 attached without using a special jig or the like.

(2) In the above-described branch pipe connecting member of the present invention, the inner circumferential member connects a plurality of contact pieces contacting the inner circumferential surface of the main pipe in a bendable and extensible manner, By bending the plurality of abutting pieces, the plurality of abutting pieces are brought into a bent state that can be introduced from the outside to the inside of the main pipe through the opening of the main pipe, and the plurality of abutting pieces are extended inside the main pipe. This causes the main pipe to be in an extended state that cannot be removed from the opening to the outside of the main pipe, and by pulling the operating member in the bent state, the inner circumferential member is brought close to the inner circumferential surface. It is preferable that it be able to be brought into the above-mentioned extended state.

In the branch pipe connecting member of the present invention, the inner circumferential member has a plurality of contact pieces connected to each other so as to be bendable and extendable. Furthermore, by bending the inner peripheral member, it can be made compact enough to be introduced into the main pipe through an opening provided in the main pipe. Therefore, the branch pipe connecting member of the present invention can easily and smoothly introduce the inner circumferential member into the main pipe.

Further, in the branch pipe connecting member of the present invention, the inner circumferential member is in a state where it cannot be removed from the opening of the main pipe to the outside of the main pipe (in an extended state) by extending the plurality of abutting pieces inside the main pipe. ). Further, by performing a pulling operation using the operating member, the inner peripheral member can be changed from a bent state to an extended state in the process of being pulled toward the inner peripheral portion of the main pipe. Therefore, in the branch pipe connecting member of the present invention, after the inner peripheral member is introduced into the main pipe, if a pulling operation is performed using the operating member, the inner peripheral member is moved to the inner peripheral part of the main pipe so that it does not come off through the opening. It can be attached to.

(3) In the above-described branch pipe connecting member of the present invention, the inner circumferential member has a connection portion that rotatably connects the plurality of contact pieces around a predetermined rotation axis, and the It is preferable that the members are connected so that the operating force associated with the pulling operation is applied at a position away from the rotation axis.

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

(4) The above-mentioned branch pipe connecting member of the present invention has an outer peripheral member attached to the outer peripheral side of the main pipe in the vicinity of the opening bored in the main pipe, and the operating member is made of a wire rod. It is preferable that the wire is taken out through a hole provided in the outer peripheral member.

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

(5) In the above-described branch pipe connecting member of the present invention, the branch pipe connecting portion has a cylindrical portion integrally provided with respect to the outer circumferential member, and the hole is formed in the cylindrical shape. It is preferable that it be installed at a position outside the section.

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

(6) The branch pipe connection member of the present invention described above has an outer circumferential member attached to the outer circumferential side of the main pipe in a peripheral part of the opening bored in the main pipe, and the branch pipe connection part includes the The inner circumferential member has a cylindrical part that is integrally provided with the outer circumferential member, penetrates the outer circumferential member, and is insertable into the opening formed in the main pipe, and the inner circumferential member It is preferable that the cylindrical part has an opening of an inner peripheral member having a size corresponding to the outer diameter of the inner peripheral member, and that the cylindrical part can be inserted into the opening of the inner peripheral member.

In the branch pipe connection member of the present invention, the cylindrical portion forming the branch pipe connection portion is provided integrally with the outer peripheral member and passes through the outer peripheral member. Further, the inner circumferential member is provided with an inner circumferential member opening having a size corresponding to the outer diameter of the cylindrical portion. Further, the cylindrical portion is capable of being inserted into an opening formed in the main pipe, and is also capable of penetrating into an opening of the inner circumferential member. Therefore, when attaching the branch pipe connecting member of the present invention to the main pipe, by penetrating the cylindrical part into the opening of the inner peripheral member, the outer peripheral member and the inner The arrangement of the peripheral members can be adjusted with high positioning accuracy. Therefore, according to the branch pipe connecting member of the present invention, it is possible to install the outer circumferential member and the inner circumferential member such that both the outer circumferential member and the inner circumferential member reliably cover the opening bored in the main pipe from the inner circumferential side and the outer circumferential side. can.

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

According to this configuration, for example, a tool such as a crowbar, a rod-shaped member, etc. at the installation site of a branch pipe to the main pipe can be inserted into the side of the main pipe while being inserted through the operating member formed in a loop shape. After that, by performing a tilting operation, the operating member can be pulled. In this way, according to the above-described configuration, the branch pipe connecting member can be installed to the main pipe by using tools such as a crowbar at the installation site as an auxiliary tool for the pulling operation. Therefore, according to the present invention, the work of attaching the branch pipe connecting member to the main pipe can be performed even more easily.

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.

FIG. 2 is a perspective view showing a state in which a branch pipe is connected to a main pipe using a branch pipe connection member according to an embodiment of the present invention. FIG. 2 is a side view showing a state in which a branch pipe is connected to a main pipe using a branch pipe connection member according to an embodiment of the present invention. FIG. 1 is a cross-sectional view showing step-by-step a method of connecting a branch pipe to a main pipe using a branch pipe connection member according to an embodiment of the present invention. (a) is a plan view in the first step of attaching the branch pipe connection member shown in FIG. 1 to the main pipe, and (b) is a plan view in the second step. FIG. 2 is a perspective view showing the state of the branch pipe connection member shown in FIG. 1 in a first step of attaching the branch pipe connection member to the main pipe. FIG. 2 is a perspective view showing the state of the branch pipe connection member shown in FIG. 1 in a second step of attaching the branch pipe connection member to the main pipe.

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

≪About the configuration of the branch pipe connecting member 10≫
The branch pipe connection member 10 is used to connect a branch pipe 5 to an opening 3 newly formed by drilling a hole in an existing main pipe 1 such as a sewer pipe, for example. The main pipe 1 can be, for example, a concrete pipe, a fume pipe, a resin pipe made of resin such as vinyl chloride, or the like. As shown in FIGS. 1 to 3, the branch pipe connecting member 10 includes an outer circumferential member 20, an inner circumferential 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 circumferential member 20 is a member that is attached to the outer circumferential surface 7 of the main pipe 1 in the periphery of the opening 3 bored in the main pipe 1 . The outer peripheral member 20 includes an outer peripheral contact portion 22, a branch pipe connection portion 24, and a plurality of (four in this embodiment) holes 26.

The outer circumferential contact portion 22 is a portion that is attached so as to abut against the outer circumferential surface 7 of the main pipe 1 . The outer circumferential contact portion 22 is a member that has an arcuate cross-sectional shape curved with the same curvature as the outer circumferential surface 7, and has a substantially rectangular shape in plan view. The outer periphery contact portion 22 has a predetermined length in the longitudinal direction (generating direction), and includes a through hole 30 provided approximately at the center in the longitudinal direction so as to penetrate from the front surface 22a toward the back surface 22b. There is.

The branch pipe connection part 24 is a part to which the branch pipe 5 is connected. The branch pipe connection part 24 has a cylindrical part 32 and a socket part 34. The cylindrical portion 32 has a cylindrical shape penetrating in the axial direction, and is provided integrally with the outer circumferential contact portion 22 . The cylindrical portion 32 protrudes to both the front surface 22a side and the back surface 22b side via a through hole 30 provided in the outer circumferential contact portion 22.

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

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

The inner peripheral member 40 is a member that is introduced into the main pipe 1 and attached to the inner peripheral surface 9 of the main pipe 1 in the periphery of the opening 3 bored in the main pipe 1 . The inner peripheral member 40 includes an abutment piece 42 and a connecting portion 44 . The inner peripheral member 40 has a plurality of (two in this embodiment) contact pieces 42, 42 connected via a connecting portion 44 so as to be bendable and extensible.

The contact piece 42 is a member that has an arcuate cross-sectional shape curved with the same curvature as the inner peripheral surface 9 of the main pipe 1, and has a substantially rectangular shape in plan view. The contact piece 42 has a predetermined length in the longitudinal direction (generating direction). The contact pieces 42 are arranged in parallel and rotatably connected to each other via a connecting portion 44 which will be 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 brought into contact with each other, and the surfaces thereof are brought into a continuous state. As a result, the inner circumferential member 40 is in an extended state (extended state) as a whole. The abutting piece 42 has a portion (a mating portion 42x) that abuts against another adjacent abutting piece 42 in the extended state. Further, when the inner circumferential member 40 is in the extended state, it is expanded so that it cannot be removed 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 back surfaces of the adjacent contact pieces 42, 42 at the connecting portion 44 so that they approach each other. When the inner circumferential member 40 is bent, it becomes compact so that it can be introduced into the main pipe 1 from the outside to the inside through the opening 3 of the main pipe 1.

The contact pieces 42, 42 have notches 46, 46 at approximately the center in the longitudinal direction (generating line direction) on the mating portions 42x, 42x side, respectively. The notches 46, 46 each have a semicircular shape. When the inner circumferential member 40 is in an expanded state, a substantially circular inner circumferential member opening 48 is formed by a combination of the notches 46 , 46 . The opening diameter of the inner circumferential member opening 48 is set to a size corresponding to the outer diameter of the inner cylindrical portion 32a of the cylindrical portion 32 of the outer circumferential member 20 that protrudes toward the back surface 22b. Therefore, the inner circumferential member opening 48 is capable of penetrating the inner cylindrical portion 32a of the cylindrical portion 32.

The connecting portion 44 rotatably connects a plurality of (two in this embodiment) abutting pieces 42 about a predetermined rotational axis C extending in the generatrix direction of the abutting pieces 42 . The connecting portion 44 may be, for example, provided with a shaft portion 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 constituted by a hinge. The rotation axis C exists at a position on the side of the mating portions 42x, 42x that form the boundary between the contact pieces 42, 42 arranged side by side.

The operating member 60 brings the inner circumferential member 40 introduced into the inside of the main pipe 1 close to the inner circumferential surface 9 of the main pipe 1 by operating the inner circumferential member 40 from outside the main pipe 1 (pulling operation). This is a member for pulling in the direction. The operating member 60 is made of a wire made of a material such as metal or resin. In this embodiment, the operating members 60 include a first operating member 60a connected to one of the contact pieces 42, 42 (hereinafter also referred to as "first contact piece 42a"), and a first operation member 60a connected to the other (hereinafter referred to as "first contact piece 42a"). A second operation member 60b connected to the "second contact piece 42b" is provided.

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

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

Similarly, one end and the other end of the second operating member 60b are inserted through holes 26, 26 provided in the outer peripheral member 20 from the front surface 22a to the back surface 22b of the outer peripheral member 20, respectively. There is. The holes 26, 26 through which the second operating member 60b is inserted are selected to be provided at positions in the outer circumferential member 20 that face the first contact pieces 42a of the inner circumferential member 40, respectively. Further, one end side and the other end side of the second operating member 60b are located at one side in the circumferential direction and at the other side in the semicircular notch 46 provided in the second contact piece 42b, respectively. 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 into a loop shape by fixing both ends to the second contact piece 42b in this manner.

The first operating member 60a and the second operating member 60b are wired as described above. Therefore, the first operating member 60a and the second operating member 60b cross each other at two points on one side and the other side in the longitudinal direction (generating direction) of the outer circumferential member 20 via the cylindrical portion 32 on the surface 22a side of the outer circumferential member 20. It is said that the arrangement is as follows. Therefore, the operation of pulling the first abutment piece 42a and the second abutment piece 42b by the operation of pulling the first operation member 60a and the second operation member 60b (pull operation) is the first operation member 60a and the second operation member 60b. This can be done by pulling the main pipe 1 towards the side.

The positioning member 80 is for positioning so that the first contact piece 42a and the second contact piece 42b forming the inner peripheral member 40 do not return from the position pulled by the operating member 60 in the opposite direction to the pulling direction. It is something. 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 on the surface 22a side of the outer peripheral member 20. Specifically, the positioning member 80 is configured such that the first operating member 60a and the second operating member 60b can be inserted therethrough. For example, 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 direction is provided. Therefore, although the first operating member 60a and the second operating member 60b can be pulled by a pulling operation, they will not return in the opposite direction unless the aforementioned mechanism is released. Therefore, the positioning member 80 can position the first abutting piece 42a and the second abutting piece 42b in the drawing position.

≪About construction method using branch pipe connection member 10≫
Next, a construction method for connecting the branch pipe 5 to the opening 3 bored in the main pipe 1 using the branch pipe connecting member 10 will be described.

As shown in FIG. 5, when connecting the branch pipe 5 to the main pipe 1, the operation member 60 of the branch pipe connection member 10 is not yet drawn, and the outer peripheral member 20 and the inner peripheral member 40 are sufficiently separated. It is prepared in a state that 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 main pipe 1 from the opening 3 in a deformed state.

When the inner circumferential member 40 is introduced into the main pipe 1 as described above, the cylinder of the branch pipe connecting portion 24 integrally provided on the outer circumferential member 20 opens as shown by the arrow (1) in FIG. The shaped part 32 is inserted into the opening 3 of the main pipe 1 with the inner cylindrical part 32a at the beginning. Further, the outer circumferential member 20 is arranged such that the outer circumferential contact portion 22 is along the outer circumferential surface 7 of the main pipe 1 .

When the arrangement of the outer circumferential member 20 is completed in this way, the first operating member 60a and the second operating member 60b are moved outward in the width direction (radial direction) of the main pipe 1, as shown in FIG. 4(a). Arranged so that it can be pulled. In this state, as shown by the arrow (2) in FIG. 3 and the arrow in FIG. A pulling operation (pulling operation) is performed from the inside to the outside. Accordingly, as shown in FIG. It is drawn toward the inner circumferential surface 9 of the main pipe 1 while changing its state from a deformed state to an elongated state inside. When the inner circumferential member 40 is drawn until it comes into contact with the inner circumferential surface 9, the inner circumferential member 40 will be in an extended state and will be in a state in which it is in close contact with the inner circumferential surface 9. This completes the attachment of the branch pipe connection member 10 to the main pipe 1. Moreover, when the branch pipe connection member 10 is attached to the main pipe 1, the branch pipe 5 is inserted into the socket part 34 of the branch pipe connection part 24 and connected. This completes the installation of the branch pipe 5 to the main pipe 1 using the branch pipe connection member 10.

As described above, in the branch pipe connecting member 10 of this embodiment, after the inner circumferential member 40 is introduced inside the main pipe 1, the inner circumferential member 40 is pulled into the inner circumferential surface by performing a pulling operation using 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 circumferential member 40 can be positioned so as to be disposed along the inner circumferential surface 9. Therefore, the branch pipe connection member 10 of this embodiment can be installed on the main pipe 1 without using any special jig or the like.

As described above, the branch pipe connecting member 10 of the present embodiment has a plurality of (two in this embodiment) contact pieces 42 connected as the inner circumferential member 40 via the connecting portion 44 so as to be bendable and extensible. It is considered a thing. By bending the inner peripheral member 40, it can be deformed into a compact state that 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 inner peripheral member 40 can be easily and smoothly introduced into the main pipe 1 through the opening 3.

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 from the outside of the main pipe 1 by the operating member 60. 40 can be changed from a flexed state to an extended state. Furthermore, the inner circumferential member 40 can be deformed into an extended state inside the main pipe 1. Further, when the inner circumferential member 40 is in the extended state, it is in a state where it cannot be removed from the main pipe 1 through the opening 3. Therefore, the branch pipe connecting member 10 can be mounted so that the inner circumferential member 40 does not separate from the opening 3 of the main pipe 1 by operation using the operating member 60 outside the main pipe 1.

In this embodiment, an example is shown in which the inner circumferential member 40 is deformable by the operation of the operating member 60 and can be bent and extended, but the inner circumferential member 40 may have other configurations. For example, the inner peripheral member 40 may be a rod-shaped member (rod-shaped member) that is longer than the opening diameter of the opening 3. When such a rod-shaped member is employed in place of the inner peripheral member 40 described above, the rod-shaped member can be introduced into the main pipe 1 through the opening 3 by tilting the rod-shaped member. Moreover, if the operating member 60 is connected to the rod-shaped member and the rod-shaped member is moved toward the inner circumferential surface 9 in a substantially horizontal position inside the main pipe 1 by pulling and operating the connecting member 60, it is possible to open the opening. The rod-shaped member is caught near the opening 3 and can be prevented from falling out from the opening 3. Therefore, even when a rod-shaped member is used as the inner peripheral member 40, it is possible to mount the inner peripheral member 40 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 the plurality of (two in this embodiment) contact pieces 42, 42 through the connecting portion 44 in a predetermined manner. They are connected so as to be rotatable about an axis C. Further, a first operating member 60a and a second operating member 60b, which constitute the operating member 60, are connected to the contact pieces 42, 42 at positions offset from the rotation axis C. Therefore, by performing a pulling operation using the operating member 60, the branch pipe connecting member 10 can rotate the contact pieces 42, 42 about the rotation axis C, and change the state from the deformed state to the extended state. can.

In this embodiment, since the inner circumferential member 40 connects the contact pieces 42, 42 in a rotatable manner, it is desirable to connect the operating member 60 at the position described above. For example, when a member that does not rotate, such as the rod-shaped member described above, is used as the inner circumferential member 40, it is desirable to adjust the connection position of the operating member 60 with respect to the inner circumferential member 40 as appropriate. For example, when a rod-shaped member is used as the inner peripheral member 40, in order to prevent it from slipping out from the opening 3, the rod-shaped member is held in a substantially horizontal position inside the main pipe 1 on the inner peripheral surface 9. It is desirable to approach and come into contact with. Therefore, in such a case, one end side and the other end side of the operating member 60 may be connected to symmetrical positions on one side and the other side in the longitudinal direction of the rod-shaped member, respectively.

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

In addition, in this embodiment, an example of a configuration is shown in which the operating members 60 (the first operating member 60a and the second operating member 60b) are made of a wire rod and can be positioned and fixed by the positioning member 80. Instead, for example, a strap with serrations formed in a serrated shape like a so-called cable tie is provided on the inner circumferential member 40 side, and a strap with serrations formed in a sawtooth shape or the like is provided on the outer circumferential member 20 side, like a head part of a cable tie. It may be configured such that the strap can be inserted therethrough and also includes a claw that engages with the serrations.

As described above, in the branch pipe connecting member 10 of this embodiment, the hole 26 provided for insertion of the operating member 60 is provided at a position outside the cylindrical portion 32 in 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 work of connecting the branch pipe 5 can be easily performed. In addition, in this embodiment, an example was shown in which the hole 26 for inserting the wire rod forming the operating member 60 was provided at a position outside the cylindrical part 32. However, for example, if the branch pipe connecting member 10 is inserted into the main pipe After installation, if it is possible to avoid interfering with the connection of the branch pipe 5 by cutting the operation member 60 before connecting the branch pipe 5, etc., the operation member 60 may be cut off before connecting the branch pipe 5. You may take it out to the outside.

As described above, the branch pipe connecting member 10 is configured so that the cylindrical portion 32 provided integrally with the outer circumferential member 20 can penetrate into the inner circumferential member opening 48 formed in the inner circumferential member 40. . Therefore, when the branch pipe connecting member 10 is attached to the main pipe 1, by penetrating the cylindrical part 32 into the inner circumferential member opening 48, the outer circumferential member 20 and the inner peripheral member 40 can be adjusted with high positioning accuracy. Therefore, according to the branch pipe connecting member 10, both the outer circumferential member 20 and the inner circumferential member 40 can be installed so as to reliably cover the opening 3 from the inner circumferential side and the outer circumferential side in the periphery of the opening 3.

In addition, in this embodiment, an example was shown in which the portion of the cylindrical portion 32 integrated with the outer circumferential member 20 that protrudes toward the back surface 22b can penetrate into the inner circumferential member opening 48 of the inner circumferential member 40. For example, the cylindrical portion 32 may protrude only toward the surface 22a of the outer circumferential member 20, and may not be able to penetrate into the inner circumferential member opening 48. Further, instead of protruding the inner cylindrical portion 32a of the cylindrical portion 32 toward the back surface 22b, another protrusion that can be engaged with the inner circumferential member opening 48 of the inner circumferential member 40 may be provided, or the inner cylindrical portion 32a Alternatively, an inner circumferential member 40 that can be engaged with one or both of the aforementioned protrusions may be provided separately from the inner circumferential member opening 48.

As described above, in the branch pipe connecting member 10, the operating member 60 (the first operating member 60a and the second operating member 60b) is formed in a loop shape, and the operating member 60 (the first operating member 60a and the second operating member 60b) is formed in a loop shape, and the operating member 60 (the first operating member 60a and the second operating member 60b) is formed in a loop shape, and A pulling operation is possible by pulling the operating member 60 toward the outside in the radial direction of the main pipe 1. 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 of the crowbar etc. The operating member 60 can be pulled by pushing it into the ground on the side of the pipe 1 and then tilting it radially outward of the main pipe 1. In this way, tools such as crowbars at the installation site can be used as auxiliary tools for pulling operations, and the work of installing the branch pipe connecting member 10 to the main pipe 1 can be performed even more easily. become. In addition, in this embodiment, an example was shown in which the wire forming the operating member 60 was formed into a loop shape, but the operating member 60 does not necessarily have to be loop-shaped.

INDUSTRIAL APPLICATION This invention can be utilized suitably for connecting a branch pipe to a main pipe in various piping, such as a water pipe, a sewer pipe, and a drainage 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 portion 48: Inner peripheral member opening 60: Operating member 80: Positioning member C: Rotation axis

Claims (6)

A branch pipe connecting member that is attached to a main pipe to form a branch pipe to the main pipe and to which the branch pipe is connected,
a branch pipe connection part to which the branch pipe is connected;
an inner peripheral member introduced into the main pipe and attached to the inner peripheral side of the main pipe in a peripheral part of an opening bored in the main pipe;
an operation 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 outside the main pipe;
a positioning member that positions the inner peripheral member at a position pulled by the pulling operation;
The inner peripheral member is
A plurality of contact pieces contacting the inner circumferential surface of the main pipe are connected so as to be bendable and extensible, and by bending the plurality of contact pieces, the contact piece can be inserted through the opening of the main pipe. A bent state in which the main pipe can be introduced from the outside to the inside, and an extended state in which the plurality of contact pieces are extended inside the main pipe so that they cannot be removed from the opening of the main pipe to the outside of the main pipe. It becomes
A branch pipe connecting member characterized in that, by pulling the operating member in the bent state, the inner circumferential member can be brought close to the inner circumferential surface and brought into the extended state. The inner peripheral member is
a connecting portion rotatably connecting the plurality of contact pieces around a predetermined rotation axis;
2. The branch pipe connecting member according to claim 1 , wherein the operating member is connected so that an operating force associated with the pulling operation is applied at a position away from the rotation axis. A branch pipe connecting member that is attached to a main pipe to form a branch pipe to the main pipe and to which the branch pipe is connected,
a branch pipe connection part to which the branch pipe is connected;
an inner peripheral member introduced into the main pipe and attached to the inner peripheral side of the main pipe in a peripheral part of an opening bored in the main pipe;
an operation 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 outside the main pipe;
a positioning member that positions the inner peripheral member at a position pulled by the pulling operation;
comprising an outer peripheral member attached to the outer peripheral side of the main pipe in a peripheral part of the opening bored in the main pipe,
The outer peripheral member has at least one hole bored at a position outside the opening,
The operating member is made of a wire,
A branch pipe connecting member, wherein at least one end of the wire is taken out through the hole and connected to the inner peripheral member. The branch pipe connection part has a cylindrical part integrally provided with the outer peripheral member,
The branch pipe connecting member according to claim 3, wherein the hole is provided at a position outside the cylindrical portion. A branch pipe connecting member that is attached to a main pipe to form a branch pipe to the main pipe and to which the branch pipe is connected,
a branch pipe connection part to which the branch pipe is connected;
an inner peripheral member introduced into the main pipe and attached to the inner peripheral side of the main pipe in a peripheral part of an opening bored in the main pipe;
an operation 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 outside the main pipe;
a positioning member that positions the inner peripheral member at a position pulled by the pulling operation;
comprising an outer peripheral member attached to the outer peripheral side of the main pipe in a peripheral part of the opening bored in the main pipe,
The branch pipe connecting part has a cylindrical part 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,
The inner peripheral member has an inner peripheral member opening having a size corresponding to the outer diameter of the cylindrical part,
A branch pipe connecting member, characterized in that the cylindrical portion can penetrate into the inner peripheral member opening. A branch pipe connecting member that is attached to a main pipe to form a branch pipe to the main pipe and to which the branch pipe is connected,
a branch pipe connection part to which the branch pipe is connected;
an inner peripheral member introduced into the main pipe and attached to the inner peripheral side of the main pipe in a peripheral part of an opening bored in the main pipe;
an operation 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 outside the main pipe;
a positioning member that positions the inner peripheral member at a position pulled by the pulling operation;
comprising an outer peripheral member attached to the outer peripheral side of the main pipe in a peripheral part of the opening bored in the main pipe,
The outer peripheral member has a plurality of holes bored on the outer peripheral side of the opening,
The operation member is formed into a loop shape by having one end side and the other end side taken out through the plurality of holes and connected to the inner peripheral member,
A branch pipe connecting member, wherein the pulling operation is possible by pulling the operating member in a direction intersecting the longitudinal direction of the main pipe.

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