JP6910616B2 - Pipe material connector - Google Patents

Description

The present disclosure relates to a pipe material connector for connecting and fixing a pipe material to a through hole formed in a wall.

A pipe material connector for connecting and fixing a pipe material to a through hole formed in a wall is known. Various cables (for example, communication cables, power supply cables, etc.) are inserted inside the pipe material. By using the pipe material and the pipe material connector, the cable is buried in the ground.

As the pipe material, a corrugated pipe material (for example, a corrugated hard synthetic resin pipe (FEP)) in which regular corrugated irregularities are formed on the inner peripheral surface and the outer peripheral surface may be used. There are two types of corrugated pipe materials: spiral type and independent ring type. In the spiral corrugated tube material, the unevenness of the inner peripheral surface and the outer peripheral surface is formed in a spiral shape. In the independent ring type corrugated pipe material, a plurality of independent ring-shaped convex portions are regularly formed on the inner peripheral surface and the outer peripheral surface.

Higher waterproofness is required when burying cables in the ground using pipe materials and pipe material connectors. For example, in the pipe material connection structure described in Patent Document 1, a tubular holding body is screwed onto the outer peripheral surface of the spiral corrugated pipe material, so that the pipe material can be held from the pipe material side with respect to the wall surface around the through hole. The body is pressed. Further, by screwing the inner cylinder body to the inner peripheral surface of the spiral corrugated pipe material, the flange portion of the inner cylinder body is pressed against the wall surface around the through hole from the opposite side of the pipe material. The wall around the through hole is sandwiched between the holding body and the flange portion, so that the waterproof property is improved.

Further, in the pipe connector described in Patent Document 2, the tubular portion of the tube connector main body is inserted into the through hole, and the narrow pressure member is screwed into the screw thread on the outer peripheral surface of the tubular portion. As a result, the wall around the through hole is sandwiched between the narrow pressure member and the flange portion formed at one end of the pipe connector main body. After that, the independent ring type corrugated pipe material is pushed into the receiving port of the connecting body attached to the other end of the pipe connecting tool main body. As a result, the locking claws of the engaging body provided on the connecting body are locked to the unevenness of the outer peripheral surface of the corrugated pipe material, and the corrugated pipe material is attached to the connecting body.

Japanese Unexamined Patent Publication No. 2015-6042 Japanese Unexamined Patent Publication No. 2016-5335

There are various types of independent ring type corrugated pipe materials, and the distance (pitch) of each independent ring, the height of the independent ring, the width of the independent ring, the outer diameter of the pipe material, and the like differ depending on the type. In the pipe connector described in Patent Document 2, the type of the independent ring type corrugated pipe material that can be pushed into the connecting body and attached is limited by the shape and size of the engaging body provided in the connecting body. That is, if the type of the independent ring type corrugated pipe material is different, it is necessary to prepare an engaging body and a connecting body suitable for the type of the corrugated pipe material. Therefore, it has been difficult to connect and fix a plurality of types of independent ring-type corrugated pipe materials while maintaining high waterproofness by the conventional technique.

A typical object of the present disclosure is to provide a pipe material connector capable of easily connecting and fixing a plurality of types of independent ring type corrugated pipe materials to through holes while maintaining high waterproofness.

The pipe material connector provided by the typical embodiment in the present disclosure is a corrugated pipe material in which regular irregularities are formed on the inner peripheral surface and the outer peripheral surface by a plurality of independent ring-shaped convex portions. It is a pipe material connector that is connected and fixed to the through hole formed in the above, and is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the corrugated pipe material. A socket having a locking piece that is locked to the unevenness of the outer peripheral surface of the pipe material, and a rotary lock formed in a cylindrical shape having an inner diameter larger than the outer diameter of the socket and screwed onto the outer circumference of the socket. It is provided with a body, a tubular insertion portion having an outer diameter smaller than the inner diameter of the corrugated pipe material, and a flange portion extending outward from the outer peripheral surface of the insertion portion, and the insertion portion is inside the pipe of the corrugated pipe material. A bell mouth having a locking claw that is locked to the unevenness of the inner peripheral surface of the corrugated tube material when inserted, and the socket is mounted on the outer periphery of the corrugated tube material. As a result, the movement in the axial direction is restricted by locking the locking piece to the outer peripheral unevenness, and the insertion portion of the bell mouth is inserted into the tube of the corrugated tube material from the tip side. By locking the locking claw to the inner peripheral unevenness, the bell mouth is restricted from coming out of the corrugated tube material, and the axial length of the socket is larger than the axial length of the rotary lock body. Is also designed to be long, and a plurality of non-slip pieces extending in the axial direction are provided on the outer peripheral surface of the rotary lock body, and the rotary lock body is directed toward the tip end side of the corrugated pipe material to be the outer circumference of the socket. The corrugated pipe material is connected and fixed to the through hole by sandwiching the wall around the through hole between the rotary lock body and the flange portion of the bell mouth.

According to the pipe material connector according to the present disclosure, a plurality of types of independent ring-type corrugated pipe materials are easily connected and fixed to through holes while maintaining high waterproofness.

It is a perspective view of the pipe material connector 1 in the state where each member is assembled. It is a perspective view of the tip side of the corrugated pipe material 3. It is a perspective view of the inner peripheral surface side of a socket 10 in a state where the 1st partial cylindrical portion 11 and the 2nd partial cylindrical portion 12 are open. It is a perspective view of the outer peripheral surface side of a socket 10 in a state where the 1st partial cylindrical portion 11 and the 2nd partial cylindrical portion 12 are open. It is a perspective view of the rotary lock body 30 seen from diagonally above the tip side. It is a perspective view which looked at the rotary lock body 30 from diagonally above on the rear end side. It is a perspective view of the bell mouth 40 seen from diagonally above the tip side. It is sectional drawing when the state which the corrugated pipe material 3 is connected and fixed is seen in the vertical cross section including the axis O.

<Overview>
The pipe material connector illustrated in the present disclosure is used when connecting and fixing an independent ring type corrugated pipe material to a through hole formed in a wall. Regular irregularities are formed on the inner peripheral surface and the outer peripheral surface of the independent ring type corrugated tube material by a plurality of independent ring-shaped convex portions. The tube material connector in the present disclosure includes a socket, a rotary lock body, and a bell mouth. The socket is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the corrugated pipe material. Further, the socket has a locking piece that is locked to the outer peripheral unevenness of the corrugated pipe material when it is mounted on the outer peripheral surface of the corrugated pipe material. The rotary lock body is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the socket, and is screwed onto the outer circumference of the socket. The bell mouth includes an insertion part, a flange part, and a locking claw. The insertion portion is a tubular (for example, cylindrical) member having an outer diameter smaller than the inner diameter of the corrugated pipe material. The flange portion extends outward from the outer peripheral surface of the insertion portion. The locking claw is locked to the inner peripheral unevenness of the corrugated tube material when the insertion portion is inserted into the tube of the corrugated tube material.

By mounting the socket on the outer circumference of the corrugated pipe material, the movement of the corrugated pipe material in the axial direction is restricted by locking the locking piece to the outer peripheral unevenness. When the insertion portion of the bell mouth is inserted into the tube of the corrugated tube material from the tip side, the bell mouth is restricted from coming out of the corrugated tube material by locking the locking claw to the inner peripheral unevenness. Further, when the rotary lock body is screwed onto the outer circumference of the socket, the wall around the through hole is sandwiched between the rotary lock body and the flange portion of the bell mouth. As a result, the corrugated pipe material is connected and fixed to the through hole.

According to the pipe material connector in the present disclosure, the corrugated pipe material is connected and fixed to the through hole by tightening the rotary lock body to the socket attached to the corrugated pipe material. Since the locking piece provided in the socket only needs to be able to regulate the axial movement of the socket with respect to the corrugated pipe material, it is not necessary to have a shape that exactly matches the shape of the outer peripheral unevenness of the corrugated pipe material. Therefore, according to the pipe material connector in the present disclosure, a plurality of types of independent ring-type corrugated pipe materials are maintained in a state of high waterproofness without preparing a plurality of types of sockets depending on the type of the corrugated pipe material. Easy to connect and fix. Further, in the pipe connecting tool and the like disclosed in Patent Document 2, the thickness of the wall on which the through hole is formed needs to be thinner than the tubular portion of the pipe connecting tool main body. On the other hand, according to the pipe material connector of the present embodiment, the corrugated pipe material is appropriately connected and fixed to the through hole regardless of the thickness of the wall on which the through hole is formed.

The body of the socket may include a plurality of partial cylinders, each of which constitutes a portion of the cylinder. In this case, the socket is mounted on the outer circumference of the corrugated pipe material by fitting the plurality of partial cylindrical portions to each other. Therefore, the operator can easily mount the socket at an appropriate position as compared with the case where the socket is integrally formed in a cylindrical shape in advance. In addition, it is easier to manufacture than when the socket is integrally formed in a cylindrical shape in advance.

As an example, the partial cylindrical portion of the embodiment shown below is two semi-cylindrical portions. However, the number and shape of the partial cylindrical portions can be set as appropriate. For example, the body of the socket may include three or more partial cylinders.

The socket may include an engaging portion and an engaged portion. The engaging portion and the engaged portion engage with each other when the plurality of partial cylindrical portions are fitted, thereby connecting the plurality of partial cylindrical portions in a cylindrical shape. In this case, the operator can screw the rotary lock body to the outer circumference of the socket in a state where the plurality of partial cylindrical portions are connected in a cylindrical shape by the engaging portion and the engaged portion. Therefore, the work efficiency is further improved.

The socket may include a hinge portion. The hinge portion connects one end portions of the plurality of partial cylindrical portions, and rotates one partial cylindrical portion with respect to the other partial cylindrical portion about a rotation axis parallel to the axial direction of the socket. In this case, the operator can easily attach the socket to the corrugated pipe material only by rotating (opening and closing) the partial cylindrical portion around the hinge portion. In addition, it is easier to manage the members as compared with the case where the plurality of partial cylindrical portions are completely separated.

However, it is also possible to separate a plurality of partial cylindrical portions without providing a hinge portion. In this case, the operator may fit the partial cylindrical portions together while aligning the plurality of partial cylindrical portions so as to form a cylindrical shape.

The locking piece may be a rib protruding inward from the inner peripheral surface of the partial cylindrical portion. In this case, the contact area between the outer peripheral unevenness of the corrugated pipe material and the locking piece becomes wider than when a protrusion or the like is used as the locking piece. Therefore, when the rotary lock body is tightened, a force is applied to each part more appropriately, and the stability of connection fixing is improved.

As an example, the locking piece of the embodiment shown below is an annular rib extending without a gap in the circumferential direction. Therefore, the stability of connection fixing is further improved. However, a substantially annular rib with a partially opened portion may be used as the locking piece. It is also possible to use the protrusion as a locking piece. Further, for example, the locking piece is not locked when the socket is simply assembled to the corrugated pipe material, and the locking piece is locked for the first time when the rotary lock body is attached to the socket. The configuration of may be devised.

Further, in the embodiment shown below, a plurality of (three in the embodiment) rib-shaped locking pieces are provided at different positions in the axial direction. As a result, the stability of connection fixing is further improved. However, it goes without saying that the number of locking pieces can be changed.

Further, in the embodiment shown below, a plurality of reinforcing portions are provided on the locking piece on the most tip side and the locking piece in the middle of the three locking pieces. The reinforcing portion is provided between the surface on the tip end side of the rib-shaped locking piece and the inner peripheral surface of the partial cylindrical portion to increase the strength of the locking piece. By providing the reinforcing portion, even when the rotary lock body is tightened and a large force is applied to the locking piece in the tip direction, the possibility of damage to the locking piece is reduced.

It is also possible to integrally form the socket in a cylindrical shape in advance. In this case, the operator may mount the socket on the outer circumference of the corrugated pipe material by inserting the corrugated pipe material inside the socket.

The socket may be provided with a thread on the outer peripheral surface into which the rotary lock body is screwed. In this case, the operator can appropriately screw the rotary lock body to the outer circumference of the socket.

A screw thread may be formed on the inner peripheral surface of the rotary lock body. In this case, the outer peripheral surface of the socket may be formed with a claw portion that meshes with the screw thread of the rotary lock body instead of the screw thread.

The locking claws of the bell mouth may include a first locking claw and a second locking claw. The first locking claw is locked to the inner peripheral unevenness when the insertion portion is inserted into the corrugated tube material having the first shape of the inner peripheral unevenness. On the other hand, the second locking claw is locked to the inner peripheral concavo-convex when the insertion portion is inserted into the corrugated pipe material having the inner peripheral concavo-convex shape of the second shape. In this case, the locking claws are more appropriately locked to each of the plurality of types of independent ring type corrugated tube materials. Therefore, the stability of connection fixing is further improved.

<Embodiment>
Hereinafter, typical embodiments in the present disclosure will be described with reference to the drawings. In the following description, of the two open ends of the corrugated pipe material 3 (see FIG. 2), the side connected and fixed to the through hole is set as the tip.

(Outline of each member)
With reference to FIG. 1, each member included in the pipe material connector 1 of the present embodiment will be schematically described. The pipe material connector 1 of the present embodiment includes a socket 10, a rotary lock body 30, and a bell mouth 40. The socket 10 is mounted on the outer circumference of the corrugated pipe material 3 (see FIG. 2). The shape of the socket 10 attached to the corrugated pipe material 3 is cylindrical. When the mounting is completed, the movement of the socket 10 in the direction along the axis O is restricted. The rotary lock body 30 is a cylindrical member and is screwed onto the outer circumference of the socket 10 mounted on the corrugated pipe member 3. That is, when the rotary lock body 30 is rotated by the operator, the rotary lock body 30 moves in the direction along the axis O with respect to the corrugated pipe member 3 and the socket 10. The bell mouth 40 is inserted into the tube of the corrugated tube material 3 from the tip side. As a result, the bell mouth 40 is restricted from coming out of the tube. The corrugated tube material 3 is connected and fixed to the through hole by sandwiching the wall around the through hole between the rotary lock body 30 and the flange portion 46 of the bell mouth 40 (see FIG. 7, details will be described later).

(Corrugated pipe material)
With reference to FIG. 2, the corrugated pipe material 3 connected and fixed by the pipe material connector 1 of the present embodiment will be described. As the corrugated pipe material 3, an FEP pipe or the like capable of being appropriately bent can be used. As the material of the corrugated pipe material 3, various materials such as polyethylene, polycarbonate, ABS, polypropylene and the like can be adopted. Regular corrugated irregularities are formed on each of the outer peripheral surface and the inner peripheral surface of the corrugated pipe material 3.

Specifically, the pipe material connector 1 of the present embodiment is used to connect and fix the independent ring type corrugated pipe material 3. In the independent ring type corrugated pipe material 3, a plurality of ring-shaped convex portions 6 independently of each other are regularly formed on the outer peripheral surface and the inner peripheral surface. That is, as shown in FIG. 2, a plurality of ring-shaped outer peripheral convex portions 6A are arranged at equal intervals on the outer peripheral surface of the independent ring type corrugated pipe material 3, so that the outer peripheral unevenness 5A is formed. .. An outer peripheral recess 7A is formed between the two outer peripheral convex portions 6A adjacent to each other. Further, on the inner peripheral surface of the independent ring type corrugated pipe material 3, a plurality of ring-shaped inner peripheral convex portions 6B are arranged at equal intervals to form an inner peripheral unevenness 5B. Between the two inner peripheral convex portions 5B, there is an inner peripheral concave portion 7B. The pipe material connector 1 of the present embodiment is formed so that the thickness is substantially constant. Therefore, the back side of the outer peripheral convex portion 6A becomes the inner peripheral concave portion 7B, and the back side of the outer peripheral concave portion 7A becomes the inner peripheral convex portion 6B.

There are various types of independent ring type corrugated pipe material 3. When the type of the corrugated pipe material 3 is different, the distance between the independent rings (that is, the distance between the two adjacent convex portions 6), the height of the convex portion 6 (the depth of the concave portion 7), and the distance between the convex portions 6 are different. At least one of the width, maximum outer diameter, and minimum inner diameter is different. According to the pipe material connecting tool 1 of the present embodiment, a plurality of types of independent ring type corrugated pipe materials 3 are connected and fixed. Hereinafter, the configuration of each member will be described in detail.

(socket)
The socket 10 will be described with reference to FIGS. 3 and 4. The socket 10 is formed of a hard material (for example, resin or the like). The socket 10 of the present embodiment includes a plurality of partial cylindrical portions 11 and 12. The plurality of partial cylindrical portions 11 and 12 are members that each form a part of a cylinder and have a cylindrical shape when assembled. As an example, in the present embodiment, the main body of the socket 10 becomes cylindrical by fitting the first partial cylindrical portion 11 and the second partial cylindrical portion 12, which are semi-cylindrical, to each other. The inner diameter of the socket 10 in the cylindrical state is larger than the outer diameter (maximum outer diameter) of the corrugated pipe material 3. Specifically, the inner diameter of the socket 10 of the present embodiment matches the outer diameter of the corrugated pipe material 3 when connecting and fixing the corrugated pipe material 3 having the largest outer diameter among the plurality of types of corrugated pipe materials 3. Is designed for.

The socket 10 includes a hinge portion 17. The hinge portion 17 of the present embodiment connects the ends of the two partial cylindrical portions 11 and 12 in the axially intersecting directions. Further, the hinge portion 17 rotates one partial cylindrical portion with respect to the other partial cylindrical portion about a rotation axis parallel to the axial direction of the socket 10. Therefore, the operator can easily fit the socket 10 into a cylindrical shape only by rotating the partial cylindrical portions 11 and 12 around the hinge portion 17.

The socket 10 includes an engaging portion 14 and an engaged portion 15. The engaging portion 14 and the engaged portion 15 engage with each other when the two partial cylindrical portions 11 and 12 are fitted into a cylindrical shape, so that the two partial cylindrical portions 11 and 12 are in a cylindrical state. Connecting. As an example, in the present embodiment, a claw-shaped engaging portion 14 is provided at each of the peripheral end portion on the distal end side and the circumferential end portion on the rear end side of the partial cylindrical portion 11. Further, an engaged portion 15 which is a rectangular hole is provided at each of the peripheral end portion on the front end side and the circumferential direction end portion on the rear end side of the partial cylindrical portion 12. When the partial cylindrical portions 11 and 12 are rotated around the hinge portion 17, the engaging portion 14 engages with the engaged portion 15. Needless to say, the number, position, shape and the like of the engaging portion 14 and the engaged portion 15 can be changed as appropriate. For example, an engaging portion 14 and an engaged portion 15 are further provided between the engaging portion 14 and the engaged portion 15 on the front end side and the engaging portion 14 and the engaged portion 15 on the rear end side. You may.

As shown in FIG. 3, the socket 10 includes a locking piece 19. When the socket 10 is mounted on the outer circumference of the corrugated pipe material 3, the locking piece 19 is locked to the outer peripheral unevenness 5A (see FIG. 2) of the corrugated pipe material 3. As an example, the locking piece 19 of the present embodiment is a rib protruding inward from the inner peripheral surface of the partial cylindrical portions 11 and 12. Specifically, the locking piece 19 of the present embodiment is an annular rib that extends without a gap in the circumferential direction about the axis of the socket 10 when the two partial cylindrical portions 11 and 12 are assembled in a cylindrical shape. .. When the locking piece 19 is ribbed, the contact area between the outer peripheral unevenness 5A of the corrugated pipe material 3 and the locking piece 19 is wider than when a protrusion or the like is used, and the stability of connection fixing is improved. do.

Further, in the present embodiment, a plurality of locking pieces 19 are provided at different positions in the axial direction of the socket 10. Specifically, in the present embodiment, the first locking piece 19A, the second locking piece 19B, and the third locking piece 19C are arranged at a predetermined distance in order from the tip end side. As a result, the stability of connection fixing is further improved.

Further, in the present embodiment, each of the first locking piece 19A and the second locking piece 19B is provided with a reinforcing portion 20. The reinforcing portion 20 is provided between the surface on the tip end side of the rib-shaped locking piece 19 and the inner peripheral surface of the partial cylindrical portions 11 and 12. As an example, the reinforcing portion 20 of the present embodiment is a plurality of small ribs. Needless to say, when the reinforcing portion 20 is provided, the specific configuration of the reinforcing portion 20 and the number of locking pieces 19 on which the reinforcing portion 20 is provided may be changed. For example, the third locking piece 19C may also be provided with the reinforcing portion 20.

As shown in FIG. 4, a screw thread 22 is provided on the outer peripheral surface of the socket 10. The screw thread 22 of the present embodiment is formed on the outer peripheral surfaces of the two partial cylindrical portions 11 and 12. When the two partial cylindrical portions 11 and 12 are assembled in a cylindrical shape, the screw thread 22 becomes spiral. A rotary lock body 30 is screwed onto the screw thread 22. Further, the axial length of the socket 10 is designed to be longer than the axial length of the rotary lock body 30. Therefore, the operator can screw the rotary lock body 30 to the outer periphery of the socket 10 while holding a part of the socket 10 so that the socket 10 does not rotate in the circumferential direction. As an example, in the present embodiment, the length of the socket 10 in the circumferential direction is designed to be about 150 mm, and the length of the rotary lock body 30 in the circumferential direction is designed to be about 100 mm.

(Rotating lock body)
The rotary lock body 30 will be described with reference to FIGS. 5 and 6. The rotary lock body 30 is formed of a hard material (for example, resin or the like). The shape of the rotary lock body 30 is a cylindrical shape having an inner diameter larger than the outer diameter of the socket 10 in a cylindrical state.

In order to screw the rotary lock body 30 to the outer circumference of the socket 10, the rotary lock body 30 is provided with a screw claw 32. As shown in FIG. 6, in the present embodiment, a plurality of pairs of screw claws 32 project inward at positions facing each other on the inner peripheral surface of the main body of the rotary lock body 30. As a result, the rotary lock body 30 is stably screwed into the socket 10.

A lock-side flange portion 34 is provided at the tip portion of the rotary lock body 30. The lock side flange portion 34 is an annular member extending outward from the entire circumference of the tip of the rotary lock body 30. Although not shown in FIG. 5, an annular packing 35 (see FIG. 8) having an inner diameter smaller than the inner diameter of the rotary lock body 30 is provided on the tip side of the lock side flange portion 34. There is. The packing 35 is flexible and prevents water from penetrating between the rotary lock body 30 and the wall 60.

Further, a plurality of reinforcing pieces 36 extending in the axial direction are provided on the outer peripheral surface of the rotary lock body 30. The tip of each reinforcing piece 36 is connected to the lock side flange portion 34. Therefore, the strength of the main body of the rotary lock body 30 and the lock side flange portion 34 is increased by the reinforcing piece 36. The reinforcing piece 36 also functions as a non-slip when the operator rotates (screws) the rotary lock body 30.

(Bellmouth)
The bell mouth 40 will be described with reference to FIG. 7. The bell mouth 40 is made of a hard material (eg, resin, etc.) that has slight flexibility. The bell mouth 40 includes an insertion portion 42, a locking claw 44, and a flange portion 46.

The shape of the insertion portion 42 is a tubular shape having an outer diameter smaller than the inner diameter of the corrugated pipe material 3. The insertion portion 42 of the present embodiment has a cylindrical shape, but may have a square tubular shape or the like. The insertion portion 42 is inserted into the pipe of the corrugated pipe material 3 from the tip side.

The locking claw 44 is locked to the inner peripheral unevenness 5B (see FIG. 2) of the corrugated pipe material 3 when the insertion portion 42 is inserted into the pipe of the corrugated pipe material 3. As an example, in the present embodiment, a U-shaped hole is formed in the central portion of the insertion portion 42, and the locking claw 44 projects outward from the portion surrounded by the hole. The portion surrounded by the U-shaped hole is slightly flexible. Further, when the portion surrounded by the U-shaped hole is flexed, stress is generated in the direction of returning to the original shape. The surface on the rear end side of the locking claw 44 is a slope that goes outward as it approaches the tip side. When the insertion portion 42 is gradually pushed into the pipe of the corrugated pipe material 3, the locking claw 44 is pushed by the inner peripheral convex portion 6B and bends inward. After that, when the slope on the rear end side of the locking claw 44 separates from the inner peripheral convex portion 6B, the locking claw 44 fits into the inner peripheral concave portion 7B due to stress. As a result, the surface on the tip end side of the locking claw 44 comes into contact with the inner peripheral convex portion 6B, and the insertion portion 42 is locked. Needless to say, the specific configuration of the locking claw 44 can be changed. Further, the bell mouth 40 may be fixed to the tip of the corrugated tube material 3 by an adhesive member such as a bond.

In the present embodiment, the first locking claw 44A and the second locking claw 44B are provided. The first locking claw 44A is locked to the inner peripheral unevenness 5B when the insertion portion 42 is inserted into the corrugated pipe material 3 having the inner peripheral unevenness 5B having the first shape. On the other hand, the second locking claw 44B is locked to the inner peripheral concavo-convex 5B when the insertion portion 42 is inserted into the corrugated pipe material 3 whose inner peripheral concavo-convex 5B has the second shape. Therefore, in the present embodiment, the same bell mouth 40 can be used for a plurality of types (at least two types) of corrugated pipe materials 3 having different shapes of the inner peripheral unevenness 5B. Although not shown in FIG. 7, a pair of first locking claws 44A are provided at symmetrical positions about the axis. Similarly, a pair of second locking claws 44B are also provided about the shaft. Therefore, the bell mouth 40 is more firmly locked to the inner peripheral unevenness 5B of the corrugated tube material 3. Needless to say, three or more types of locking claws 44 may be provided.

The flange portion 46 extends outward from the outer peripheral surface of the insertion portion 42 (specifically, in the present embodiment, the outer peripheral surface of the tip end side end portion of the insertion portion 42). The flange portion 46 of the present embodiment is an annular shape extending around the entire circumference of the cylindrical insertion portion 42 without a gap. The outer diameter of the flange portion 46 is larger than the diameter of the through hole 61 (see FIG. 8) formed in the wall. Specifically, the diameter of the flange portion 46 in this embodiment is predetermined based on the diameter of the through hole 61 formed in the wall by a general core bit. If the diameter of the flange portion 46 is too small, the possibility that the entire through hole 61 cannot be closed by the flange portion 61 and water stopping cannot be ensured increases. On the other hand, if the diameter of the flange portion 46 is too large, the flange portions 46 of the plurality of pipe material connectors 1 are connected and fixed to each of the plurality of through holes 61 formed side by side on the same wall. There is a high possibility that they will interfere with each other and a gap will be created between the wall and the flange portion 46. Here, the diameter of the through hole 61 formed by a general core bit is predetermined. Therefore, the diameter of the flange portion 46 in the present embodiment can block the entire through hole 61 even when the eccentricity of the shaft of the corrugated pipe material 3 with respect to the shaft of the through hole 61 formed by the core bit is maximized. The minimum diameter is a small amount with a margin.

Although not shown in FIG. 7, a packing 47 and a packing plasticizer 48 (see FIG. 8) are provided on the surface on the rear end side of the flange portion 46 (that is, the surface on the side facing the wall 60). Has been done. The shape of the packing 47 is an annular shape (annular in the present embodiment), and the inner diameter of the packing 47 is larger than the outer diameter of the insertion portion 42. The packing 47 is flexible and prevents water from penetrating between the flange portion 46 and the wall 60. Further, the packing plasticizer 48 is filled inside the packing 47 (that is, the space between the annular packing 47 and the insertion portion 42). Since the packing plasticizer 48 has plasticity and is easily deformed, it is easily filled inside the packing 47. In addition, the packing plasticizer 48 has a property of not absorbing and permeating water and oxygen. As an example, as the packing plasticizer 48, 2100 Aquastop manufactured by Stopak Co., Ltd. or the like can be used. When the corrugated pipe material 3 is connected and fixed by the pipe material connector 1, the tip portion of the corrugated pipe material 3 bites into the filling plasticizer 48. As a result, the waterproof property is further improved.

(How to fix the connection)
With reference to FIG. 8, a method of connecting and fixing the corrugated pipe material 3 by the pipe material connector 1 of the present embodiment will be described. The operator inserts the corrugated pipe material 3 into the cylindrical rotary lock body 30 in advance. Next, the operator attaches the socket 10 to a portion of the outer circumference of the corrugated pipe material 3 on the tip side of the rotary lock body 30. When the socket 10 is mounted on the outer circumference of the corrugated pipe material 3, the movement of the socket 10 in the direction of the axis O is restricted by locking the locking piece 19 to the outer peripheral unevenness 5A (see FIG. 2). Since the locking piece 19 only needs to be able to regulate the movement of the socket 10 in the direction of at least the axis O, it is not necessary to have a shape that exactly matches the shape of the outer peripheral unevenness 5A. Therefore, the operator can attach the socket 10 to a plurality of types of corrugated pipe materials 3 having different shapes of the outer peripheral unevenness 5A and use the socket 10.

Next, the operator pushes the insertion portion 42 of the bell mouth 40 into the pipe of the corrugated pipe material 3 from the tip side in a state where the tip portion of the corrugated pipe material 3 is inserted into the through hole 61 formed in the wall 60. The bell mouth 40 is pushed in until the tip of the corrugated tube member 3 comes into contact with the packing plasticizer 48. In this state, the locking claws 44 of the bell mouth 40 (at least one of the first locking claws 44A and the second locking claws 44B in the present embodiment) are regularly arranged in a plurality of inner peripheral recesses 7B. Get into one of the. As a result, the bell mouth 40 is restricted from coming out of the corrugated tube material 3.

Next, the operator screwes the rotary lock body 30 around the outer circumference of the socket 10 and moves the rotary lock body 30 toward the tip end side. When the tip end portion (packing 35 in this embodiment) of the rotary lock body 30 comes into contact with the wall 60 around the through hole 61, the operator further tightens the rotary lock body 30. As a result, the wall 60 around the through hole 61 is sandwiched between the rotary lock body 30 and the flange portion 46 of the bell mouth 40. By the above work, the corrugated pipe material 3 is connected and fixed to the through hole 61 in a state where high waterproofness is maintained. The type of corrugated pipe material 3 that can be connected and fixed is not limited to one type.

1 Pipe material connector 3 Waved pipe material 5A Outer circumference unevenness 5B Inner circumference unevenness 10 Socket 11 1st part Cylindrical part 12 2nd part Cylindrical part 14 Engagement part 15 Engagement part 17 Hing part 19A 1st locking piece 19B 2nd Locking piece 19C 3rd locking piece 22 Thread 30 Rotating lock body 32 Screwing claw 40 Bellmouth 42 Insertion part 44A 1st locking claw 44B 2nd locking claw 46 Flange part 60 Wall 61 Through hole

Claims (7)

It is a pipe material connector that connects and fixes a corrugated pipe material in which regular irregularities are formed on the inner peripheral surface and the outer peripheral surface by a plurality of independent ring-shaped convex portions, and connects and fixes them to through holes formed in the wall. ,
It is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the corrugated pipe material, and when it is mounted on the outer circumference of the corrugated pipe material, it is locked to the outer peripheral unevenness which is the unevenness of the outer peripheral surface of the corrugated pipe material. A socket with a piece and
A rotary lock body formed in a cylindrical shape having an inner diameter larger than the outer diameter of the socket and screwed onto the outer circumference of the socket.
A tubular insertion portion having an outer diameter smaller than the inner diameter of the corrugated pipe material and a flange portion extending outward from the outer peripheral surface of the insertion portion are provided, and the insertion portion is inserted into the pipe of the corrugated pipe material. A bell mouth having a locking claw that is locked to the unevenness of the inner peripheral surface of the corrugated tube material.
With
By mounting the socket on the outer circumference of the corrugated pipe material, axial movement is restricted by locking the locking piece on the outer peripheral unevenness.
By inserting the insertion portion of the bell mouth into the tube of the corrugated tube material from the tip side, the bell mouth can be pulled out from the corrugated tube material by locking the locking claw to the inner peripheral unevenness. Is regulated,
The axial length of the socket is designed to be longer than the axial length of the rotary lock body.
A plurality of non-slip pieces extending in the axial direction are provided on the outer peripheral surface of the rotary lock body.
The rotary lock body is screwed onto the outer periphery of the socket toward the tip end side of the corrugated tube material, and the wall around the through hole is sandwiched between the rotary lock body and the flange portion of the bell mouth. , A pipe material connecting tool, characterized in that the corrugated pipe material is connected and fixed to the through hole. The pipe material connector according to claim 1.
The main body of the socket is a pipe material connector characterized by including a plurality of partial cylindrical portions, each of which constitutes a part of a cylinder. The pipe material connector according to claim 2.
The socket
A pipe material connecting tool provided with an engaging portion and an engaged portion for connecting the plurality of partial cylindrical portions in a cylindrical shape by engaging with each other when the plurality of partial cylindrical portions are fitted together. .. The pipe material connector according to claim 2 or 3.
The socket
A hinge portion that connects one end portions of the plurality of partial cylindrical portions and rotates one of the partial cylindrical portions with respect to the other partial cylindrical portion about a rotation axis parallel to the axial direction of the socket. A pipe material connector that is further equipped. The pipe material connector according to any one of claims 2 to 4.
The locking piece is a pipe material connector characterized by being a rib protruding inward from the inner peripheral surface of the partial cylindrical portion. The pipe material connector according to any one of claims 1 to 5.
The socket
A pipe material connector characterized in that the outer peripheral surface is provided with a screw thread into which the rotary lock body is screwed. The pipe material connector according to any one of claims 1 to 6.
The locking claw of the bell mouth is
When the insertion portion is inserted into the corrugated pipe material having the first shape of the inner peripheral unevenness, the first locking claw that is locked to the inner peripheral unevenness and
When the insertion portion is inserted into the corrugated tube material having a second shape in which the shape of the inner peripheral unevenness is different from the first shape, the second locking claw that is locked to the inner peripheral unevenness
A pipe material connector characterized by containing.

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