JP2018183002A - Pipe material connecting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe material connecting tool capable of easily connecting and fixing a plurality of types of independent ring type corrugated pipe material to a through hole while maintaining high waterproofness.SOLUTION: A pipe material connecting tool 1 connects and fixes an independent ring type corrugated pipe material 3 to a through hole 61 formed in a wall 60. The pipe material connecting tool 1 includes a socket 10, a rotary lock body 30, and a bell mouth 40. The socket 10 is attached to the outer periphery of the corrugated pipe material 3, such that the movement in the direction of the axis O is restricted by the engagement of an engagement piece 19. When an insertion portion 42 of the bell mouth 40 is inserted into the pipe of the corrugated pipe material 3 from the distal end side, detachment of the bell mouth 40 from the corrugated pipe material 3 is regulated by the engagement of an engagement claw 44. When the rotary lock body 30 is screwed onto the outer periphery of the socket 10, the wall 60 around the through hole 61 is pinched by the rotary lock body 30 and a flange portion 46 of the bell mouth 40. As a result, the corrugated pipe material 3 is connected and fixed to the through hole 61.SELECTED DRAWING: Figure 8

Description

  The present disclosure relates to a tube fitting for connecting and securing a tube to a through hole formed in a wall.

  Tubular fittings are known for connecting and securing tubing to through holes formed in the wall. Various cables (for example, a communication cable, a feeding cable, etc.) are inserted into the inside of the tube. Cables are embedded in the ground by using tubing and tubing fittings.

  As a pipe material, a corrugated pipe (for example, a corrugated hard synthetic resin pipe (FEP) or the like) 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 tube materials: helical and independent ring. In the helical corrugated pipe, the irregularities on the inner and outer peripheral surfaces are formed in a helical shape. In the independent ring type corrugated tube material, a plurality of ring-shaped convex portions independent of each other are regularly formed on the inner circumferential surface and the outer circumferential surface.

  When the cables are embedded in the ground using pipes and pipe connectors, higher waterproofness is required. For example, in the connection structure of the pipe described in Patent Document 1, the cylindrical sandwiching body is screwed to the outer peripheral surface of the helical corrugated pipe, whereby the wall surface around the through hole is clamped from the pipe side. The body is pressed. Furthermore, the inner cylindrical body is screwed with the inner peripheral surface of the helical corrugated pipe, whereby the flange portion of the inner cylindrical body is pressed from the opposite side of the pipe against the wall surface around the through hole. The waterproof property is improved by sandwiching the peripheral wall of the through hole by the clamping body and the flange portion.

  Moreover, in the pipe connector described in Patent Document 2, the cylindrical portion of the pipe 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 cylindrical portion. As a result, the peripheral wall of the through hole is pinched by the narrowing member and the flange portion formed at one end of the pipe connector body. After that, the independent ring-shaped corrugated tube is pushed into the socket of the connector mounted on the other end of the tube connector body. As a result, the locking claws of the engaging body provided on the connection body are engaged with the unevenness of the outer peripheral surface of the corrugated tube, and the corrugated pipe is attached to the corrugated member.

JP, 2015-6042, A JP, 2016-5335, A

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

  A typical object of the present disclosure is to provide a tube fitting capable of easily connecting and fixing a plurality of independent ring corrugated tubes to a through hole while maintaining high waterproofness.

  The pipe material connector provided by the typical embodiment of the present disclosure has a wall with corrugated pipe material in which regular asperities are formed on the inner circumferential surface and the outer circumferential surface by a plurality of independent ring-shaped convex portions. A tubular material connector connected and fixed to the through hole formed in the cylindrical shape, the cylindrical shape having an inner diameter larger than the outer diameter of the corrugated tube, and mounted on the outer periphery of the corrugated tube; A socket having a locking piece to be engaged with an outer peripheral unevenness which is an unevenness of an outer peripheral surface of a pipe material, and a cylindrical lock having an inner diameter larger than the outer diameter of the socket and screwed to the outer periphery of the socket A body, a tubular insertion portion having an outer diameter smaller than the inner diameter of the corrugated tube, and a flange portion extending outward from an outer peripheral surface of the insertion portion, the insertion portion being in the pipe of the corrugated tube Concave portion of the inner circumferential surface of the corrugated tube when inserted A bell mouth having a locking claw that is locked to the inner circumferential unevenness, and the socket is mounted on the outer circumference of the corrugated tube, thereby engaging the locking piece to the outer circumferential unevenness The movement in the axial direction is restricted by the stop, and the insertion portion of the bell mouth is inserted from the distal end side into the pipe of the corrugated tube, whereby the locking claw is engaged with the inner circumferential unevenness. Withdrawal of the bell mouth from the corrugated tube is regulated, and the rotational lock body is screwed to the outer periphery of the socket toward the tip end side of the corrugated tube, and the rotational lock body and the flange of the bell mouth The corrugated tube is connected and fixed to the through hole by sandwiching the peripheral wall of the through hole with the portion.

  According to the tube fitting according to the present disclosure, a plurality of types of independent ring wave tubes can be easily connected and fixed to the through holes in a state in which high waterproofness is maintained.

It is a perspective view of the tube fitting 1 in the state where each member was attached. It is a perspective view of the tip side of the corrugated tube 3. It is a perspective view by the side of the inner skin of socket 10 in the state where the 1st partial cylinder part 11 and the 2nd partial cylinder part 12 were opened. It is a perspective view by the side of the peripheral face of socket 10 in the state where the 1st partial cylinder part 11 and the 2nd partial cylinder part 12 were opened. It is the perspective view which looked at the rotation lock body 30 from the tip end side slanting upper part. It is the perspective view which looked at the rotation lock body 30 from the back end side diagonally upward. It is the perspective view which looked at bell mouth 40 from the tip side slanting upper part. It is sectional drawing at the time of seeing the state by which the pipe 3 with a wave was connected fixed by the longitudinal cross-section containing the axis | shaft O. As shown in FIG.

<Overview>
The tube fitting illustrated in the present disclosure is used when connecting and fixing the independent ring type corrugated tube to the through hole formed in the wall. Regular irregularities are formed on the inner circumferential surface and the outer circumferential surface of the independent ring-shaped corrugated tube by a plurality of ring-shaped convex portions which are independent of each other. The tube fitting in the present disclosure comprises a socket, a rotating lock and a bellmouth. The socket is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the corrugated tube. Moreover, the socket has a locking piece that is locked to the outer peripheral unevenness of the corrugated tube when mounted on the outer periphery of the corrugated pipe. The rotation lock body is formed in a cylindrical shape whose inner diameter is larger than the outer diameter of the socket, and is screwed on the outer periphery of the socket. The bellmouth has an insertion portion, a flange portion, and a locking claw. The insertion portion is a cylindrical (for example, cylindrical) member having an outer diameter smaller than the inner diameter of the corrugated tube. The flange portion extends outward from the outer peripheral surface of the insertion portion. The locking claw is locked to the inner circumferential unevenness of the corrugated tube when the insertion portion is inserted into the corrugated pipe.

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

  According to the pipe connector in the present disclosure, the corrugated pipe is connected and fixed to the through hole by tightening the rotation lock body in the socket attached to the corrugated pipe. The locking piece provided in the socket only needs to be able to restrict the axial movement of the socket with respect to the corrugated tube, so it is not necessary to have a shape that closely matches the shape of the outer peripheral unevenness of the corrugated tube. Therefore, according to the pipe material connector in the present disclosure, the plural types of independent ring-type corrugated pipe materials maintain high waterproofness without preparing plural kinds of sockets according to the kinds of corrugated pipe materials. It is easily connected and fixed. Moreover, in the pipe connector etc. which were disclosed by patent document 2, the thickness of the wall in which the through-hole was formed needs to be thinner than the cylindrical part of a pipe connector main body. On the other hand, according to the tube connector of the present embodiment, the corrugated tube is properly connected and fixed to the through hole regardless of the thickness of the wall in which the through hole is formed.

  The body of the socket may comprise a plurality of partial cylindrical portions, each of which constitutes a portion of a cylinder. In this case, the socket is mounted on the outer periphery of the corrugated tube 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. Moreover, manufacture is also easy compared with the case where a socket is integrally formed previously in cylindrical shape.

  As an example, the partial cylindrical portion of the embodiment shown below is two half cylindrical portions. However, the number and shape of the partial cylindrical portion can be set as appropriate. For example, the body of the socket may comprise more than two partial cylindrical parts.

  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 to connect the plurality of partial cylindrical portions in a cylindrical shape. In this case, the worker can screw the rotation lock body to the outer periphery of the socket in a state where the plurality of partial cylindrical portions are cylindrically connected by the engaging portion and the engaged portion. Therefore, the working efficiency is further improved.

  The socket may have a hinge. The hinge portion connects one ends of the plurality of partial cylindrical portions to one another, and rotates one partial cylindrical portion with respect to the other partial cylindrical portion around 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 simply by rotating (opening and closing) the partial cylindrical portion around the hinge portion. Further, management of members is easier than when the plurality of partial cylindrical portions are completely separated.

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

  The locking piece may be a rib projecting inward from the inner circumferential surface of the partial cylindrical portion. In this case, as compared with the case of using a protrusion or the like as the locking piece, the contact area of the outer circumferential asperity of the corrugated tube and the locking piece becomes wider. Therefore, when the rotation lock body is tightened, a force is applied to each part more appropriately, and the stability of connection fixation is improved.

  As an example, the locking piece of the embodiment shown below is an annular rib extended without a gap in the circumferential direction. Therefore, the stability of connection fixation is further improved. However, a substantially annular rib which is partially open may be used as the locking piece. Moreover, it is also possible to employ | adopt a protrusion as a latching piece. Also, for example, the locking piece is not locked in a state where the socket is assembled to the corrugated tube, and the locking piece is locked for the first time when the rotation lock body is attached to the socket. The configuration of may be devised.

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

  Moreover, in the embodiment shown below, a plurality of reinforcing portions are provided on the most distal locking piece and the middle locking piece among the three locking pieces. The reinforcing portion is provided between the surface on the tip side of the rib-like locking piece and the inner peripheral surface of the partial cylindrical portion, thereby increasing the strength of the locking piece. By providing the reinforcing portion, even when the rotation lock body is tightened and a large force in the distal direction is applied to the locking piece, the possibility of breakage or the like of the locking piece is reduced.

  In addition, it is also possible to integrally form the socket in a cylindrical shape in advance. In this case, the worker may attach the socket to the outer periphery of the corrugated tube by inserting the corrugated tube inside the socket.

  The socket may have a thread on the outer peripheral surface on which the rotation lock body is screwed. In this case, the worker can properly screw the rotation lock body to the outer periphery of the socket.

  A thread may be formed on the inner circumferential surface of the rotation lock body. In this case, the outer peripheral surface of the socket may be formed not with a thread but with a claw that engages with the thread of the rotation lock body.

  The locking claw of the bell mouth may include a first locking claw and a second locking claw. The first locking claw is locked to the inner circumferential unevenness when the insertion portion is inserted into the corrugated pipe having the first shape of the inner circumferential unevenness. On the other hand, the second locking claw is locked to the inner circumferential unevenness when the insertion portion is inserted into the corrugated pipe having the second shape of the inner circumferential unevenness. In this case, the locking claws are locked more appropriately to each of the plurality of independent ring-shaped corrugated tubes. Therefore, the stability of connection fixation is further improved.

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

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

(Waved tube)
With reference to FIG. 2, the corrugated tube 3 connected and fixed by the tube fitting 1 of the present embodiment will be described. As the corrugated tube 3, it is possible to use an FEP pipe or the like that can be bent appropriately. For example, various materials such as polyethylene, polycarbonate, ABS, and polypropylene can be adopted as the material of the corrugated tube 3. Regular corrugated irregularities are formed on each of the outer peripheral surface and the inner peripheral surface of the corrugated tube 3.

  In detail, 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 tube 3, a plurality of ring-shaped convex portions 6 independent of each other are regularly formed on the outer peripheral surface and the inner peripheral surface. That is, as shown in FIG. 2, on the outer peripheral surface of the independent ring-shaped corrugated tube material 3, the outer peripheral unevenness 5A is formed by arranging a plurality of ring-shaped outer peripheral convex portions 6A at equal intervals. . An outer peripheral recess 7A is formed between two adjacent outer peripheral projections 6A. Further, on the inner peripheral surface of the independent ring-shaped corrugated tube member 3, the inner peripheral unevenness 5B is formed by arranging a plurality of ring-shaped inner peripheral convex portions 6B at equal intervals. An inner peripheral recess 7B is formed between the two inner peripheral protrusions 5B. In addition, the pipe material connector 1 of this embodiment is shape | molded so that thickness may become substantially constant. Accordingly, the back side of the outer peripheral convex portion 6A is the inner peripheral concave portion 7B, and the rear side of the outer peripheral concave portion 7A is the inner peripheral convex portion 6B.

  There are various types of the independent ring type corrugated tube 3. When the type of the corrugated tube 3 is different, the distance between the independent rings (that is, the distance between the two adjacent protrusions 6), the height of the protrusions 6 (the depth of the recess 7), and the height of each protrusion 6 The width, the maximum outside diameter, and / or the minimum inside diameter are different. According to the pipe material connector 1 of the present embodiment, a plurality of types of independent ring type corrugated pipe members 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, a resin or the like). The socket 10 of the present embodiment includes a plurality of partial cylindrical portions 11 and 12. Each of the plurality of partial cylindrical portions 11 and 12 is a member which constitutes a part of a cylinder and whose shape when assembled is a cylindrical shape. As an example, in the present embodiment, the first partial cylindrical portion 11 and the second partial cylindrical portion 12 each having a semi-cylindrical shape are fitted to each other, whereby the main body of the socket 10 has a cylindrical shape. The inner diameter of the cylindrical socket 10 is larger than the outer diameter (maximum outer diameter) of the corrugated tube 3. Specifically, the inner diameter of the socket 10 according to the present embodiment matches the outer diameter of the corrugated tube 3 when connecting and fixing the corrugated tube 3 having the largest outer diameter among the plural types of corrugated tube 3. It is designed.

  The socket 10 is provided with a hinge portion 17. The hinge part 17 of this embodiment connects the edge parts of the direction which cross | intersects the axial direction among two partial cylindrical parts 11 and 12. In addition, the hinge portion 17 rotates one partial cylindrical portion with respect to the other partial cylindrical portion around a rotation axis parallel to the axial direction of the socket 10. Therefore, the worker can easily fit the socket 10 in a cylindrical shape simply 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 in a cylindrical shape, thereby making the two partial cylindrical portions 11 and 12 cylindrical. Connecting. As an example, in the present embodiment, claw-shaped engaging portions 14 are provided at each of the end in the circumferential direction on the tip end side and the end in the circumferential direction on the rear end side in the partial cylindrical portion 11. Further, an engaged portion 15 which is a rectangular hole is provided at each of the end in the circumferential direction on the front end side and the end in the circumferential direction 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, positions, shapes, and the like of the engaging portions 14 and the engaged portions 15 can be changed as appropriate. For example, the engaging portion 14 and the 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. May be

  As shown in FIG. 3, the socket 10 is provided with a locking piece 19. When the socket 10 is mounted on the outer periphery of the corrugated tube 3, the locking pieces 19 are locked on the outer peripheral unevenness 5 A (see FIG. 2) of the corrugated tube 3. As an example, the locking piece 19 of this embodiment is a rib which protrudes inward from the inner peripheral surface of the partial cylindrical parts 11 and 12. Specifically, the locking piece 19 of the present embodiment is an annular rib extending without a gap in the circumferential direction around 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 in the form of a rib, the contact area of the outer peripheral asperity 5A of the corrugated tube 3 and the locking piece 19 is wider than in the case of using a protrusion or the like, and the stability of connection fixation is improved. Do.

  Further, in the present embodiment, the plurality of locking pieces 19 are provided at different positions in the axial direction of the socket 10. In detail, 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 fixation is further improved.

  Furthermore, in the present embodiment, a reinforcing portion 20 is provided on each of the first locking piece 19A and the second locking piece 19B. The reinforcing portion 20 is provided between the end surface of the rib-like locking piece 19 and the inner peripheral surface of the partial cylindrical portions 11 and 12. As an example, the reinforcement part 20 of this embodiment is a plurality of small ribs. In addition, when providing the reinforcement part 20, it can not be overemphasized that the specific structure of the reinforcement part 20, the number of the locking pieces 19 which provide the reinforcement part 20, etc. may be changed. For example, the reinforcing portion 20 may be provided also on the third locking piece 19C.

  As shown in FIG. 4, a thread 22 is provided on the outer peripheral surface of the socket 10. The thread 22 of the present embodiment is formed on the outer peripheral surface of the two partial cylindrical portions 11 and 12. When the two partial cylindrical parts 11 and 12 are assembled in a cylindrical shape, the thread 22 becomes helical. The rotation lock body 30 is screwed into the screw thread 22. Further, the axial length of the socket 10 is designed to be longer than the axial length of the rotation lock body 30. Therefore, the operator can screw the rotation lock body 30 to the outer periphery of the socket 10 while restraining 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 circumferential length of the socket 10 is designed to be about 150 mm, and the circumferential length of the rotation lock body 30 is designed to be about 100 mm.

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

  In order to screw the rotation lock body 30 to the outer periphery of the socket 10, the rotation lock body 30 is provided with a screwing claw 32. As shown in FIG. 6, in the present embodiment, a plurality of pairs of screwing claws 32 project inward at mutually opposing positions on the inner circumferential surface of the main body of the rotation lock body 30. As a result, screwing of the rotation lock body 30 to the socket 10 is stably performed.

  A lock side flange portion 34 is provided at the tip of the rotation 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. In addition, although illustration is abbreviate | omitted in FIG. 5, the annular packing 35 (refer FIG. 8) whose internal diameter is still smaller than the internal diameter of the rotation lock body 30 is provided in the front end side of the lock side flange part 34. There is. The packing 35 is flexible and prevents the penetration of water between the rotary lock body 30 and the wall 60.

  Furthermore, a plurality of reinforcing pieces 36 extending in the axial direction are provided on the outer peripheral surface of the rotation lock body 30. The tip of each reinforcing piece 36 is connected to the lock side flange portion 34. Accordingly, the strength of the main body of the rotation 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 slip stopper when the operator rotates (screws) the rotation lock body 30.

(Bellmouth)
The bell mouse 40 will be described with reference to FIG. Bell mouth 40 is formed of a hard material (for example, resin etc.) which 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 cylindrical shape having an outer diameter smaller than the inner diameter of the corrugated tube 3. Although the insertion part 42 of this embodiment is cylindrical, it may be rectangular or the like. The insertion portion 42 is inserted into the pipe of the corrugated tube 3 from the distal end side.

  When the insertion portion 42 is inserted into the pipe of the corrugated tube 3, the locking claw 44 is locked to the inner circumferential unevenness 5 B (see FIG. 2) of the corrugated pipe 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 protrudes outward from the portion surrounded by the hole. The portion surrounded by the U-shaped hole is slightly flexible. In addition, when the portion surrounded by the U-shaped hole is flexible, 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 toward the outside as it approaches the front end side. When the insertion portion 42 is gradually pushed into the corrugated tube 3, the locking claws 44 are pushed by the inner circumferential convex portions 6 </ b> B and bend inward. Thereafter, when the slope on the rear end side of the locking claw 44 separates from the inner circumferential convex portion 6B, the locking claw 44 is fitted into the inner circumferential concave portion 7B by stress. As a result, the surface on the tip end side of the locking claw 44 contacts the inner circumferential convex portion 6B, and the insertion portion 42 is locked. Needless to say, the specific configuration of the locking claw 44 can be changed. The bell mouth 40 may be fixed to the tip of the corrugated tube 3 by an adhesive member such as a bond.

  In the present embodiment, a first locking claw 44A and a second locking claw 44B are provided. The first locking claw 44A is locked to the inner circumferential unevenness 5B when the insertion portion 42 is inserted into the corrugated tube 3 in which the inner circumferential unevenness 5B has a first shape. On the other hand, the second locking claw 44B is locked to the inner circumferential unevenness 5B when the insertion portion 42 is inserted into the corrugated tube 3 in which the inner circumferential unevenness 5B has a second shape. Therefore, in the present embodiment, the same bellmouth 40 can be used for a plurality of types (at least two types) of corrugated tube materials 3 having different shapes of the inner circumferential unevenness 5B. Although not shown in FIG. 7, a pair of first locking claws 44 </ b> A is provided at positions symmetrical with respect to the axis. Similarly, the second locking claws 44B are also provided in a pair around the shaft. Therefore, the bell mouth 40 is more firmly locked to the inner circumferential unevenness 5 B of the corrugated tube 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 distal end portion of the insertion portion 42). The flange portion 46 of the present embodiment has an annular shape extending without a gap around the entire axis of the cylindrical insertion portion 42. 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. In detail, the diameter of the flange portion 46 in the present 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 of the through hole 61 can not be blocked by the flange portion 61 and watertightness can not be secured increases. On the other hand, when the diameter of the flange portion 46 is too large, the flange portions 46 of the plurality of pipe material connectors 1 are fixed when connecting the corrugated tube 3 to each of the plurality of through holes 61 formed in the same wall. The two interfere with each other, and the possibility of the formation of a gap between the wall and the flange 46 increases. 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 close the entire through hole 61 even when the eccentricity of the axis of the corrugated tube 3 with respect to the axis of the through hole 61 formed by the core bit is maximum. The diameter of the smallest diameter has a margin by a small amount.

  Although not shown in FIG. 7, packing 47 and filling plasticizer 48 (see FIG. 8) are provided on the rear end side face of the flange portion 46 (that is, the side facing the wall 60). It is done. The shape of the packing 47 is annular (in the present embodiment, annular), 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 the penetration of water between the flange portion 46 and the wall 60. In addition, the filling plasticizer 48 is filled inside the packing 47 (that is, the space between the annular packing 47 and the insertion portion 42). The filling plasticizer 48 has plasticity and is easily deformed, so it is easily filled inside the packing 47. Also, the filled plasticizer 48 has the property of not absorbing and permeating water and oxygen. As an example, as the filling plasticizer 48, a 2100 Aquastop manufactured by STPACK can be used. When the corrugated tube 3 is connected and fixed by the pipe connector 1, the tip of the corrugated tube 3 bites into the filling plasticizer 48. As a result, the waterproofness is further improved.

(Connection fixing method)
A method of connecting and fixing the corrugated tube 3 by the tube fitting 1 of the present embodiment will be described with reference to FIG. 8. The operator inserts the corrugated tube 3 into the cylindrical rotation lock body 30 in advance. Next, the worker mounts the socket 10 on the tip end side of the rotation lock body 30 in the outer periphery of the corrugated tube 3. When the socket 10 is mounted on the outer periphery of the corrugated tube 3, the movement of the socket 10 in the direction of the axis O is restricted by the locking of the locking piece 19 on the outer peripheral unevenness 5 A (see FIG. 2). The locking piece 19 only needs to restrict movement of the socket 10 at least in the direction of the axis O. Therefore, the locking piece 19 does not have to have a shape that closely matches the shape of the outer peripheral unevenness 5A. Therefore, the worker can attach and use the socket 10 on a plurality of types of corrugated tubes 3 having different shapes of the outer peripheral unevenness 5A.

  Next, the operator inserts the insertion portion 42 of the bell mouth 40 into the pipe of the corrugated tube 3 from the distal end side, with the distal end of the corrugated tube 3 inserted in the through hole 61 formed in the wall 60. The bell mouth 40 is pushed until the tip of the corrugated tube 3 comes in contact with the filling plasticizer 48. In this state, the plurality of inner circumferential recessed portions 7B in which the locking claws 44 of the bell mouth 40 (in the present embodiment, at least one of the first locking claws 44A and the second locking claws 44B) are regularly arranged. Get into one of the. As a result, removal of the bell mouth 40 from the corrugated tube 3 is restricted.

  Next, the operator causes the rotation lock body 30 to be screwed onto the outer periphery of the socket 10, and moves the rotation lock body 30 toward the tip end side. When the distal end (the packing 35 in the present embodiment) of the rotary lock body 30 contacts 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 rotation lock body 30 and the flange portion 46 of the bell mouth 40. By the above operation, the corrugated tube material 3 is connected and fixed to the through hole 61 in a state where high waterproofness is maintained. The type of the corrugated tube 3 that can be connected and fixed is not limited to one.

DESCRIPTION OF SYMBOLS 1 Pipe material connector 3 Waved pipe material 5A Outer peripheral unevenness 5B Inner peripheral unevenness 10 Socket 11 1st partial cylindrical part 12 2nd partial cylindrical part 14 Engagement part 15 Engaged part 17 Hinge part 19A 1st locking piece 19B 2nd Locking piece 19C Third locking piece 22 Thread 30 Rotation lock body 32 Screwing claw 40 Bell mouth 42 Insertion portion 44A First locking claw 44B Second locking claw 46 Flange portion 60 Wall 61 Through hole

Claims (7)

A tube connector for connecting and fixing a corrugated tube having regular irregularities on the inner and outer peripheral surfaces by a plurality of ring-shaped convex portions which are independent of each other, to a through hole formed in a wall, ,
Locking is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the corrugated tube, and is engaged with the outer peripheral unevenness which is the unevenness of the outer peripheral surface of the corrugated tube when mounted on the outer periphery of the corrugated tube A socket with a piece,
A rotary lock body formed in a cylindrical shape having an inner diameter larger than the outer diameter of the socket, and screwed to the outer periphery of the socket;
A tubular insertion portion having an outer diameter smaller than the inner diameter of the corrugated tube, and a flange portion expanding outward from the outer peripheral surface of the insertion portion, and the insertion portion is inserted into the corrugated tube A bell mouth having a locking claw which is engaged with the inner circumferential surface asperity of the inner circumferential surface of the corrugated tube,
Equipped with
By mounting the socket on the outer periphery of the corrugated tube, the movement of the socket in the axial direction is restricted by the locking of the locking piece to the outer peripheral unevenness,
The insertion portion of the bellmouth is inserted from the distal end side into the pipe of the corrugated tube, and the locking claw is locked to the inner circumferential unevenness, so that the bellmouth is detached from the corrugated pipe Is regulated,
The rotation lock body is screwed on the outer periphery of the socket toward the tip end side of the corrugated tube, and the wall around the through hole is sandwiched by the rotation lock body and the flange portion of the bell mouth. A tube connector, wherein the corrugated tube is connected and fixed to the through hole. A tubing connector according to claim 1, wherein
A tube connector, wherein the main body of the socket comprises a plurality of partial cylindrical portions, each of which constitutes a portion of a cylinder. The tube fitting according to claim 2, wherein
The socket is
A pipe material connecting tool including 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. . The pipe connector according to claim 2 or 3, wherein
The socket is
A hinge for connecting one ends of the plurality of partial cylindrical portions together and rotating 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 The pipe connector characterized in that it further comprises. It is a pipe material connector according to any one of claims 2 to 4,
The tubular connector according to claim 1, wherein the locking piece is a rib projecting inward from an inner circumferential surface of the partial cylindrical portion. It is a pipe material connector according to any one of claims 1 to 5,
The socket is
A pipe material connector including a thread on the outer peripheral surface on which the rotation lock body is screwed. 7. A tube fitting according to any one of the preceding claims, wherein
The locking claw of the bell mouth is
A first locking claw that is locked to the inner circumferential unevenness when the insertion portion is inserted into the corrugated tube having a first inner circumferential unevenness;
A second locking claw that is engaged with the inner circumferential unevenness when the insertion portion is inserted into the corrugated pipe having a second shape whose inner circumferential unevenness has a second shape different from the first shape;
A pipe material connector characterized in that it comprises:

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