JP2013139877A - Pipe connecting tool and pipe connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably connect corrugated pipes to a pipe connecting tool in response to the corrugated pipes different in a pipe diameter.SOLUTION: This pipe connecting tool 1 includes a first half-split body 21 and a second half-split body 31, and has connecting holes 7 to which corrugated protective pipe 62 are connected, and a divided surface 12 of a cylindrical body for forming half-split openings allowing the corrugated protective pipes 62 to be arranged in the connecting holes 7 by moving them from the radial direction, in the connecting holes 7. The connecting hole 7 is formed in an elliptic shape by closing a pair of half-split bodies to be connected with a corrugated protective pipe 62a of a small diameter without flattening or by flattening it, and to be connected with a corrugated protective pipe 62b of a large diameter by flattening it more than the corrugated protective pipe 62a of the small diameter, and the major axis of an elliptic is formed in the orthogonal direction to the divided surface 12.

Description

  The present invention relates to a pipe connection device and a pipe connection device in which corrugated pipes formed by a pair of halves or a pair of halves and having concavities and convexities continuous in the axial direction on the outer surface are connected.

  Conventionally, in detached houses and apartment houses, cables etc. are wired, and water pipes such as water supply pipes and hot water supply pipes are provided to supply water and hot water to the kitchen, bathroom, bathroom vanity, water heater, etc. ing. These cables, water pipes, and the like are generally inserted and protected in a corrugated sheath pipe over almost the entire area of the wiring and piping paths in order to prevent deterioration due to ultraviolet rays and damage from the outside. Moreover, in the peripheral location where a water pipe etc. are connected to a water heater etc., the exposed part of the water pipe pulled out from the edge part of a corrugated sheath pipe is also covered with another wave protection pipe. A pipe connector is generally attached to the end of these corrugated pipes. In many cases, a corrugated pipe connector is formed of a cylindrical body composed of a pair of halves in view of connection workability and the like. The pipe connector of this half structure has a connection hole formed by closing a pair of halves, and the peripheral flange fits into the recess on the outer surface of the end portion of the corrugated pipe. Connect the corrugated tube to the retaining state. As this type of pipe connector having a halved structure, for example, one disclosed in Japanese Patent Application Laid-Open No. 2003-176884 is known.

  In the pipe connector disclosed in the above publication, the cylindrical body constituting the pipe connector has a cylindrical shape and is composed of two divided cylindrical members. And the two division | segmentation cylinder members are connected with the one end side of the circumferential direction by the hinge, and the other end side of the circumferential direction is connected by the connection member. Further, the connecting member is configured to hold the circumferential end of the divided cylinder member in a closed state by tightening a nut to a bolt body that penetrates the divided cylinder member. This pipe connection tool connects pipes such as corrugated pipes by the cylindrical body.

JP 2003-176684 A

  However, the corrugated pipes connected to the pipe fittings and the like have various standard products and the standards are not standardized among manufacturers. ing. Even in the same standard product, due to the shape of the corrugated surface of the outer surface, the tube diameter tends to vary during manufacturing. For this reason, it was not possible to connect to corrugated pipes having various pipe diameters with only one type of pipe connector. Therefore, a plurality of types of pipe fittings must be prepared corresponding to the difference in the diameter of the corrugated pipe, which is uneconomical. Moreover, even if it can be connected to the pipe connector, the peripheral edge of the connection hole does not fully fit into the recess on the outer surface of the corrugated pipe due to variations in the pipe diameter due to manufacturing, etc. There was something I couldn't do.

  Then, this invention makes it a subject to provide the pipe connection tool and pipe connection apparatus which can connect these corrugated pipes stably corresponding to corrugated pipes from which a pipe diameter differs.

  The pipe connector according to claim 1 is formed of a pair of halves or a cylindrical body having a pair of halves, and connected to a corrugated pipe having an outer surface formed with continuous irregularities in the axial direction. A connection hole to which the corrugated pipe is connected, and a half-opening that allows the corrugated pipe to be moved from the radial direction and disposed in the connection hole, is formed in the connection hole. A split surface between the pair of halves or between the pair of halves. The connection hole can connect the small-diameter corrugated pipe without flattening or flattening the small-diameter corrugated pipe so as to correspond to corrugated pipes having two types of large and small diameters. In order to make the connection flatter than the corrugated tube, the pair of halves or the pair of halves are closed to form an elliptical shape or a substantially elliptical shape. And the said connection hole is formed in the direction where a long axis is orthogonal to the said split surface.

  With this configuration, when the corrugated tube has a small diameter, the corrugated tube is connected to the short axis portion of the connection hole having an elliptical shape or the like in a perfect circle or a shape close thereto. On the other hand, when the diameter of the corrugated tube is larger than the short axis of the connection hole, the corrugated tube can be connected to the connection hole by deforming the connection end of the corrugated tube into a flat shape. Therefore, it can be connected to the pipe connector corresponding to the corrugated pipe having a large or small pipe diameter.

  In particular, since the long axis of the connection hole is formed in a direction orthogonal to the split surface that forms a half-opening in the connection hole, when a large-diameter corrugated pipe is connected, It is possible to avoid the occurrence of a gap in the split surface between the split bodies or between the pair of halves. That is, when the connecting end of a large-diameter corrugated tube is deformed flat and connected to the connection hole, the corrugated tube attempts to return to its original circular tube shape due to its elastic force. An expanding force is generated to push and spread the connecting holes in opposite directions on the short axis side of the connecting hole. Therefore, if the long axis of the connection hole is formed in the same direction as the split surface of the cylindrical body, the elastic return force of the corrugated tube is generated in the opposite direction on the short axis side. A gap may occur. However, as described above, since the long axis of the connection hole is formed in a direction orthogonal to the split surface, the direction in which the elastic return force of the corrugated tube is applied and the direction in which the split surface is expanded have a phase of 90 degrees. Unlikely, since the elastic restoring force of the corrugated tube has nothing to do with the expansion of the split surface, the generation of a gap in the split surface is avoided.

Specifically, the corrugated pipe covers and protects piping materials such as water pipes and wirings such as cables from the outside. The corrugated tube is connected to the connection hole in a retaining state by inserting and engaging the peripheral edge of the connection hole of the connection tool in the concave portion on the outer surface thereof.
The connection hole of the connector is not limited to an elliptical shape, but has a substantially elliptical shape, that is, a shape similar to an ellipse, for example, a track shape or an oval shape in which semicircles on both sides are connected by two parallel lines. It is good.

The pipe connector according to claim 2 is a corrugated pipe in which the corrugated pipes of two kinds of large and small diameters have different diameters due to differences in manufacturers and standards.
According to a third aspect of the present invention, a wall surface for closing the opening is provided at the end of the tubular body of the tube connection tool, and a connection hole is provided in the wall surface.
In the pipe connector according to claim 4, a plurality of connection holes are provided so as to connect a plurality of corrugated pipes to at least one wall surface.

  The pipe connection device according to claim 5 is a corrugated pipe having two types of diameters according to claim 1 or claim 2, wherein the outer surface is formed with irregularities that are continuous in the axial direction, and The pipe connector according to any one of the above.

  In the present invention, since the connection hole of the pipe connector is formed in an elliptical shape or a substantially elliptical shape, it is possible to connect corrugated pipes of different sizes of large and small diameters, which is economical, Management becomes easy. In particular, since the long axis of the connection hole is formed in a direction perpendicular to the split surface of the cylindrical body, even when a large-diameter corrugated tube is connected, the corrugated tube is elastic to a perfect circle shape. It is possible to prevent a gap from being generated in the split surface between the pair of halves or between the pair of halves due to the return force. Thereby, it can prevent that a foreign material penetrate | invades from the clearance gap which generate | occur | produced in the split surface, or an external appearance falls. Moreover, when the contact part which consists of a half hole which contacts the outer surface of a water flow pipe and stops water is provided in the inside of a connection tool, it prevents that a water stop falls by the clearance gap generating in a split surface. be able to.

It is a perspective view which shows the pipe connector of 1st embodiment of this invention. It is a top view of the pipe connector of FIG. It is a perspective view of the state which developed the pipe connector of Drawing 1. The expanded pipe connector of FIG. 3 is shown, (a) is a top view, (b) is a front view. It is a front view which shows the connection location of the pipe connector of FIG. It is a schematic diagram which shows the direction of the elastic return force in the state which connected the large diameter corrugated protective tube to the connection hole of FIG. 1, (a) is the case where the long axis of the connection hole and the split surface are orthogonal, (b) shows the case where the long axis and the split surface of the connection hole are on the same line. It is a top view which shows the pipe connector in the state of FIG.6 (b). It is a perspective view which shows the pipe connector of 2nd embodiment of this invention.

<First embodiment>
First, a pipe connector according to a first embodiment of the present invention will be described with reference to FIGS. Here, FIGS. 1 and 2 show the pipe connector, and FIGS. 3 and 4 show a state where the pipe connector is developed. In addition, in 1st and 2nd embodiment, the pipe connection tool illustrates what connects the corrugated pipe | tube which protects the water flow pipe connected to the pipe joint of a water heater.

  In FIG.1 and FIG.5, the two pipe joints 65 for the water flow of going and returning are provided in the bottom face of the water heater 64 with a home cooking function. Each of these pipe joints 65 has a water pipe 61 for sending hot water from a water heater 64 to a water tap such as a kitchen, a bathroom, a toilet, and a washbasin (not shown), and a water heater for additionally cooking from the bathroom or floor heating. A water pipe 61 returning to 64 is connected. These two water pipes 61 are inserted into a corrugated sheath pipe 63 formed of a corrugated pipe made of synthetic resin to protect this, and one corrugated pipe with two pipes in parallel as a pair pipe. It is stored in the sheath tube 63. The two water pipes 61 are drawn out from the end portion of the corrugated sheath pipe 63 and then branched in two directions, and are respectively connected to the pipe joint 65 of the water heater 64. And the pipe connector 1 is attached to the edge part of the corrugated sheath pipe 63 ranging over the water flow pipe 61 pulled out from here. Further, between the pipe joint 65 and the pipe connector 1 in the water pipe 61, the exposed water pipe 61 drawn out from the corrugated sheath pipe 63 through the pipe connector 1 to the outside is protected and kept warm. A corrugated protective tube 62 such as a heat shield tube is attached to cover the outside of the water flow tube 61. The tube connector 1 and the corrugated protective tube 62 constitute a tube connection device. Hereinafter, each component will be specifically described.

First, the water flow pipe 61 is formed of a circular hard resin pipe such as a flexible cross-linked polyethylene pipe or polybutene pipe, and a fluid such as tap water or hot water flows through the inside.
Next, the corrugated sheath pipe 63 that integrally accommodates the two water pipes 61 in a parallel state is formed of a hard resin such as polyethylene, and the outer surface is an uneven surface of a convex portion and a concave portion. It has flexibility and bendability, and has a substantially oval cross section. The corrugated sheath pipe 63 reaches the entire piping path of the water pipe 61 excluding the periphery of the connection end portion with the pipe joint 65 of the water heater 64 and is externally attached to the outer side of the water pipe 61. 61 is prevented from being damaged or damaged, and is also prevented from being deteriorated by ultraviolet rays.
The corrugated protective pipe 62 attached between the pipe joint 65 of the water heater 64 and the pipe connector 1 is made of a hard resin, has flexibility and flexibility, and has a pipe shape with a perfect cross section. It has a certain circular pipe shape. The corrugated protective tube 62 is connected to the connection hole 7 by inserting and engaging a peripheral edge 7a of a connection hole 7 of the tube connector 1 described later in a concave portion on the outer surface of the end portion. The corrugated protective tube 62 corresponds to the corrugated tube of the claims.

  Next, as shown in FIGS. 1 to 4, the pipe connector 1 is formed in a half-cut cylindrical body having a split surface 12, and the shape of the cross section perpendicular to the pipe axis of the outer wall 2 is substantially oval. It has a shape. One end of the tube connector 1 in the tube axis direction is provided with a sheath tube mounting portion 3 to which an end portion of the corrugated sheath tube 63 is coupled, and an end portion of the corrugated sheath tube 63 is inserted therein. A substantially oval shaped sheath tube mounting hole 4 is provided. The sheath tube mounting hole 4 is formed in a substantially oval shape so as to match the cross-sectional shape of the corrugated sheath tube 63, and is smaller than the outer diameter of the outer surface of the convex portion of the corrugated sheath tube 63. The corrugated sheath tube 63 is connected in a retaining state by being formed larger than the outer diameter of the bottom surface, which is the outer surface of the bottom portion of the concave portion, and the peripheral edge 4a is fitted and locked into the concave portion of the corrugated sheath tube 63. It has become.

  On the other hand, at the other end in the tube axis direction of the pipe connector 1, there is provided a lead-out portion 5 through which the water pipe 61 passing through the corrugated sheath pipe 63 and the pipe connector 1 is drawn. Two elliptical connection holes 7 are independently arranged in parallel on the drawer wall 6. The connection hole 7 can connect a corrugated protective tube 62 having a large and small diameter. Specifically, the short axis length L1 of the elliptical connection hole 7 shown in FIG. 2 is smaller than the outer diameter of the convex portion of the small diameter corrugated protective tube 62a in the circular tube state, and the outer diameter of the bottom surface of the concave portion. It is formed larger. As a result, the small diameter corrugated protective tube 62a is connected to the connection hole 7 in a state in which the peripheral edge 7a of the connection hole 7 is fitted and locked in the concave portion on the outer surface thereof. Here, the two-dot chain line in the two connection holes 7 of the pipe connector 1 in FIG. 2 shows the engagement state of the two large and small corrugated protection pipes 62 to the connection hole 7 side by side for comparison. The small-diameter wavy protective tube 62a is in the engaged state indicated by the two-dot chain line of the right connection hole 7, and the outer two-dot chain line indicates the outer surface of the convex portion of the small-diameter wavy protective tube 62a. The two-dot chain line indicates the outer surface of the bottom surface of the concave portion of the small diameter corrugated protective tube 62a. For comparison, FIG. 2 shows a pair of right and left connecting holes 7 and 7 connected with a corrugated protective tube 62 having different large and small diameters as shown by two-dot chain lines. Actually, the left and right connection holes 7 may be connected to a small diameter corrugated protection tube 62a, the left and right connection holes 7 may be connected to a large diameter corrugated protection tube 62b, or as described above. Needless to say, the corrugated protective tube 62 having a large and small diameter may be connected.

  On the other hand, the corrugated protective tube 62b having a large diameter presses the outer surface of the connection end portion from both sides, deforms it into a flat shape and inserts it into the connection hole 7, and then releases the pressure along the inner periphery of the connection hole 7. It is connected by elastic return. The length L2 of the major axis of the elliptical connection hole 7 is such that the large-diameter wavy protective tube 62b is connected to the connection hole 7 at both ends on the long-axis side of the large-diameter wavy protective tube 62b. It is smaller than the interval between the convex portions and larger than the interval between the bottom surfaces of the concave portions at both ends on the long axis side. And the circumference which is the length of the perimeter of the connection hole 7 is smaller than the circumference in the convex part of the large diameter corrugated protective tube 62b, and larger than the circumference in the bottom face of the concave part. Thus, the large-diameter corrugated protective tube 62b reaches the entire circumference, and the peripheral edge 7a of the connection hole 7 is fitted and locked in the concave portion on the outer surface thereof, and is connected to the connection hole 7 in a retaining state. Here, in FIG. 2, the large-diameter wavy protective tube 62 b is in the engaged state indicated by the two-dot chain line of the left connection hole 7.

  The connection hole 7 is formed by a pair of half-split holes that are divided into two vertically on the short axis line. In the divided state, the connection hole 7 has a semi-elliptical shape, and the short axis and the split surface 12 of the cylindrical body are the same. It is on a straight line. The connection hole 7 is formed into an elliptical hole by closing a first half 21 and a second half 31 which will be described later constituting the pipe connector 1.

  Further, an abutting portion 8 that abuts the entire outer periphery of the water flow pipe 61 is provided in the pipe connector 1 at a position near the drawer portion 5 between the sheath tube attachment portion 3 and the drawer portion 5. It has been. The abutting portion 8 is formed by independently forming two circular insertion holes 10 through which the water pipe 61 is inserted into an elliptical plate-like partition wall 9 having a constant thickness provided perpendicular to the tube axis. Yes. The insertion hole 10 of the contact portion 8 is formed in such a size that the peripheral edge 10a is in contact with the entire outer surface of the water pipe 61, that is, water enters through the gap between the water pipe 61 and the insertion hole 10 due to the contact. It is formed in a size that prevents this. The insertion hole 10 of the contact portion 8 is formed into a circular hole by closing the first half 21 and the second half 31 constituting the pipe connector 1.

  A total of four drain holes 11 penetrating into and out of the pipe connector 1 are provided at positions adjacent to the corresponding contact portion 8 between the drawing portion 5 and the contact portion 8. The drain hole 11 is formed as a small square hole, and is formed in a size that allows water to be discharged to the outside when water leaks from the pipe joint 65 between the drawing portion 5 and the contact portion 8. It is formed at a position where it can be easily discharged.

  The pipe connector 1 according to the present embodiment includes two halves, a first half 21 and a second half 31, which are substantially right and left divided at the split surface 12, and this first half. A first hinge 13 is formed between the body 21 and the second half 31 so as to be thin in the tube axis direction, and the first half 21 and the second half are centered on the first hinge 13. By rotating and closing 31 relatively, it is formed in a cylindrical body. The pipe connector 1 is formed of a hard resin such as polypropylene, and can be formed by integral molding of the resin in a form in which the first half 21 and the second half 31 are developed. Therefore, it can be manufactured at low cost.

  In the first half 21 of the pipe connector 1, the abutment portion 8 is integrally provided with a rib 8 a formed of a small protrusion that abuts along the outer surface of the water passage 61. The rib 8a, together with the rib 8b of the second half 31 described later, enhances the close contact with the outer surface of the water conduit 61, and increases the water stoppage of the abutting portion 8 due to contact with the outer surface of the water conduit 61. It is provided. However, these ribs are not necessarily required to be installed.

  Further, the first half 21 has a pair of left and right locking projections 24 on both sides in the tube axis direction of the side wall 22 on one side so as to form a cylindrical body by closing the first hinge 13 as an axis. , 24 are integrally provided. The to-be-latched projection 24 has an L-shaped cross section, and the bent tip portion is to be latched with a locking hole 36 of a second half-divided body 31 described later. At the two positions near the center of the locked projection 24 in the tube axis direction, there are formed first notch holes 25 that are notched in a U shape and open on the side end face 23 side that is the split surface 12 on one side. Further, a window frame 26 slightly projecting from the surface of the outer wall 2 is integrally formed on the two peripheral edges of the first cutout hole 25. Furthermore, a space between the pair of left and right window frames 26 forms a fitted portion 27.

  On the other hand, in the second half 31 of the pipe connector 1, the abutment surface of the abutment 8 is contacted along the outer surface of the water pipe 61 like the rib 8 a of the first half 21. A rib 8b made of a small ridge that comes into contact with the ridge protrudes integrally. The tip contact portions of the ribs 8a and 8b can be formed on a flat surface or a curved surface.

  Further, the second half 31 of the pipe connector 1 is a rectangular plate at a position corresponding to the locked protrusion 24 of the first half 21 on both sides in the tube axis direction of the side wall 32 on one side. A pair of left and right engaging pieces 34, 34 are integrally projected in the horizontal direction with the joint portion with the outer wall 2 as a base end. The locking piece 34 can be rotated about a second hinge 35 provided at its base end by forming a thin wall. Each locking piece 34 is provided with a locking hole 36 formed of a square hole, and further, the tip side of the locking hole 36 is an inclined surface. A knob portion 37 for rotating is formed. Further, the side of each locking piece 34 is made of a rectangular plate material, and a closing lid 38 that closes a signal line lead-out hole 14 to be described later is integrally extended toward the center side in the tube axis direction. Therefore, if the locking piece 34 is rotated about the second hinge 35 and the locking hole 36 is locked to the locked projection 24 of the first half 21, the closing lid is interlocked with the rotation. 38 is configured to individually block the signal line lead-out hole 14. Further, the closing lid 38 can be folded along a breakage groove 39 provided between the locking piece 34 and a thin wall. By breaking the closing lid 38, the signal line lead hole is formed. 14 can be opened.

  Also, the outer wall 2 around the split surface 12 of the second half 31 is cut out in a U-shape at positions facing the two first notches 25 of the first half 21, respectively. A second cutout hole 40 is formed in the side end face 33, which is the split face 12 on the side. Further, the second cutout hole 40 has a slightly peripheral edge from the surface of the outer wall 2 of the second half split body 31. A protruding window frame 41 is integrally formed along the periphery. When the two second cutout holes 40 of the second half 31 are formed into a cylindrical body by relatively rotating and closing the first half 21 and the second half 31. , Communicating with the two first cutout holes 25 of the opposed first half body 21, and being integrated with the first cutout hole 25, a rectangular signal line lead is formed on the split face 12 of the pipe connector 1. Hole 14 is formed. The signal line lead-out hole 14 is a hole for drawing out a signal line (not shown) that is inserted into the corrugated sheath pipe 63 in parallel with the water pipe 61 and sends an electric signal to the water heater 64 and the like. When the signal line is not drawn, the signal line drawing hole 14 is always closed by the closing lid 38, so that foreign matter is prevented from entering the tube connector 1 from here. Further, a plate-like fitting protrusion 42 is provided at the center of the side end surface 33 in the tube axis direction, and the fitting protrusion 42 connects the first half 21 and the second half 31. When relatively rotating and closing, it is fitted into the fitted portion 27 of the first half 21 and the side end face 23 of the first half 21 and the side end face 33 of the second half 31 are Position to match and abut.

Next, the pipe connector 1 configured as described above is attached across the end portion of the corrugated sheath pipe 63 and the water pipe 61 drawn therefrom, and the wave as a corrugated pipe is attached to the pipe connector 1. A method of connecting the attached protective tube 62 will be described.
Prior to the attachment of the pipe connector 1 and the connection of the corrugated protective pipe 62, the end of the water flow pipe 61 is drawn from the end of the corrugated sheath pipe 63 and connected to the pipe joint 65. For this purpose, two outgoing and return water pipes 61 inserted in parallel in the corrugated sheath pipe 63 are pulled out from the end of the corrugated sheath pipe 63 for a predetermined length, and then the exposed portion is corrugated protected. The tube 62 is externally fitted. Then, the corrugated protective pipe 62 is compressed in the direction of the pipe axis so that the end of the water conduit 61 is exposed by the connection allowance, or by using the corrugated protective pipe 62 shorter than the drawing length of the water conduit 61. 61 is exposed as much as the connection allowance, and the fastening ring 66 of the pipe joint 65 is externally fitted to the water pipe 61, and then the water pipe 61 is externally fitted to a connection cylinder (not shown) of the pipe joint 65 using a tool. Press fit. Next, although not shown, a clamping tool such as a slider is used to push up the tightening ring 66 of the pipe joint 65 so that the end portion of the water pipe 61 is strongly clamped between the connection tube portion. Thereafter, the end of the corrugated protective pipe 62 is pushed back to the pipe joint 65 side.

  Thus, when the end of the water pipe 61 is connected to the pipe joint 65 in this way, the pipe connector 1 is attached across the end of the corrugated sheath pipe 63 and the water pipe 61. For this purpose, the tube connector 1 is set in the unfolded state shown in FIGS. 3 and 4, and first, as shown by a two-dot chain line in FIG. The two water pipes 61 that are placed on the peripheral edge 4 a of the sheath pipe mounting hole 4 of 31 and drawn out from the end of the corrugated sheath pipe 63 are inserted into the contact part 8 of the second half 31. It is placed on the peripheral edge 10 a of the hole 10 and the peripheral edge 7 a of the connection hole 7 of the drawer portion 5. Next, the first half 21 is rotated about the first hinge 13, and the fitting projection 42 at the center of the second half 31 is fitted to the fitted portion 27 at the center so as to be positioned. However, the side end face 23 of the first half 21 that is the split surface 12 and the side end face 33 of the second half 31 are brought into contact with each other and closed. When both halves are closed, the pair of left and right engaging pieces 34, 34 of the second half 31 is rotated about the second hinge 35, and the pair of engaging holes 36, 36 are respectively connected to the first half. The pair of locked protrusions 24 and 24 of the split body 21 are locked.

  Thereby, the peripheral edge 4a of the sheath tube mounting hole 4 of the tube connector 1 is locked to the recess on the outer surface of the corrugated sheath tube 63, and the corrugated sheath tube 63 is connected to the sheath tube mounting portion 3 in a retaining state. . Further, the peripheral edge 7 a of the connection hole 7 of the pipe connector 1 is engaged with the concave portion on the outer surface of the wave protection tube 62, and the wave protection tube 62 is coupled to the connection hole 7 in a retaining state. The peripheral edge 10 a of the insertion hole 10 of the contact portion 8 of the pipe connector 1 is in contact with the outer surface of the water pipe 61. Thus, as shown in FIG. 5, the attachment of the pipe connector 1 and the connection of the corrugated protective pipe 62 to the pipe connector 1 are completed.

Next, the connection state of the corrugated protective tube 62 having a large and small diameter to the tube connector 1 will be described with reference to FIG.
First, the small diameter corrugated protective tube 62a is formed such that the outer diameter at the convex portion on the outer surface is larger than the length L1 of the short axis of the connection hole 7, and the outer diameter at the bottom surface of the concave portion is smaller than the length L1 of the short axis. By closing the pair of the first half 21 and the second half 31, the connection hole 7 is connected in a circular tube shape or a tube shape close thereto.

  On the other hand, the large diameter corrugated protective tube 62b is connected not only in the outer diameter of the convex portion on the outer surface but also in the bottom surface of the concave portion in the shape of the circular tube itself because the outer diameter at the bottom surface of the concave portion is larger than the short axis length L1. It cannot fit in the hole 7 and cannot be connected. However, since the connection hole 7 is formed larger in circumference than the recess of the corrugated protective tube 62b having a large diameter, the corrugated protective tube 62b presses the outer surface from both sides in the vertical direction of FIG. It can be accommodated in the connection hole 7 in a state of being deformed into a long and flat shape. Therefore, the connection end portion of the corrugated protective tube 62 b can be connected to the connection hole 7 by closing the pair of the first half 21 and the second half 31. As a matter of course, the corrugated protective tube 62 has an elliptical shape only at the connection end portion, and substantially the entire length except for that is maintained in a circular tube shape. The small diameter corrugated protective tube 62a may also be connected to the connection hole 7 in a deformed state depending on the size of the diameter.

Next, the state after the corrugated protective tube 62 is connected to the connection hole 7 of the connector 1 will be described with reference to FIGS. 2, 6, and 7.
Since the corrugated protective tube 62 is formed in a circular tube shape with a synthetic resin, even if the outer surface is pressed from both sides to be deformed into a flat shape and inserted into the connection hole 7, if the pressure is released, the elastic force Trying to return to the original tube shape. Now, when the small diameter corrugated protective tube 62a is connected to the elliptical connection hole 7, the corrugated protective tube 62 hardly deforms as shown in the right connection hole 7 in FIG. It is connected in a tube shape close to it. Therefore, almost no elastic restoring force is generated in the small diameter corrugated protective tube 62a, so that no force acts on the split surface 12 around the connection hole 7.

  On the other hand, when the large-diameter wave protection tube 62b is connected to the elliptical connection hole 7, the wave protection tube 62 is deformed into a flat state along the connection hole 7, as shown in FIG. Therefore, a force is generated to elastically return to the original circular tube shape indicated by a two-dot chain line. This elastic restoring force is generated in the direction along the short axis of the connection hole 7 because it tries to return to the original circular tube shape.

  Therefore, assuming that the long axis of the connection hole 7 is formed in the same direction as the split surface 12 of the pipe connector 1 as shown in FIG. 6B, it occurs in the large diameter corrugated protective pipe 62b. Since the elastic restoring force is generated on the short axis side of the connection hole 7, depending on the magnitude of the elastic restoring force of the large-diameter wavy protective tube 62 b, the connector 1 is divided into the first half 21 by the split surface 12. And the second halved body 31 may be spread on opposite sides, and a gap S may be generated on the split surface 12. Even if the gap S is provided with hinges or engaging means at the left and right ends of the split surface 12 or is fixed by bolting or the like, the gap S is expanded at the intermediate portion in the length direction of the split surface 12. Since there is nothing to prevent, it occurs most particularly in the middle portion of the split surface 12 in the length direction, as shown in FIG. For this reason, a foreign substance may enter from the gap S, and the appearance is unsightly.

  However, as shown in FIG. 6A, the connecting tool 1 of the present embodiment is formed such that the long axis of the connecting hole 7 is perpendicular to the split surface 12 of the pipe connecting tool 1. Therefore, as described above, the elastic restoring force of the corrugated protective tube 62b acts in the short axis direction of the connection hole 7 as indicated by the arrow. However, since the short axis of the connection hole 7 is on the same line as the split surface 12, no force is generated on the split surface 12 to expand it. For this reason, a gap does not occur in the split surface 12.

Next, the operation of the pipe connector 1 will be described.
Since the connection hole 7 is formed in an elliptical shape, the tube connector 1 can be connected to the corrugated protective tube 62 having a large and small diameter by one kind.
In particular, the major axis of the elliptical connection hole 7 is formed in a direction perpendicular to the split surface 12 of the cylindrical body that forms a half opening in the connection hole 7. Here, when the connecting end portion of the corrugated protective tube 62 is deformed flat and connected to the connection hole 7, an elastic return force to the original circular tube shape is generated in the corrugated protective tube 62 as described above. Then, an expanding force is generated to push the connecting holes 7 in the opposite directions on the short axis side. However, since the phase in which the elastic restoring force acts and the direction in which the split surface 12 is to be expanded are different by 90 degrees, the occurrence of a gap in the split surface 12 is avoided. As a result, foreign matter can be prevented from entering through the gap generated on the split surface 12 and the appearance can be prevented from deteriorating.

Further, the pipe connector 1 is provided with an abutting portion 8 between the sheath tube attaching portion 3 and the lead-out portion 5, and the peripheral edge 10 a of the insertion hole 10 of the abutting portion 8 contacts the entire outer periphery of the water conduit 61. Therefore, water leakage occurs in the pipe joint 65, and the water passes through the outer surface of the water flow pipe 61 and passes through the gap with the corrugated protective pipe 62 and enters the inside of the pipe connector 1 from the connection hole 7. In addition, the water is stopped by the abutting portion 8 and further intrusion into the corrugated sheath 63 is prevented.
Here, as described above, since the major axis of the connection hole 7 is formed in a direction orthogonal to the split surface 12, the split surface 12 of the cylindrical body is formed even when the large-diameter corrugated protective tube 62b is connected. Since the gap S is prevented from being generated in the contact portion 8, the contact portion 8 is also composed of a half hole of the contact portion 8 in the connection tool 1 by connecting the large diameter corrugated protective tube 62 b. It is prevented that the insertion hole 10 expands at the split surface 12 and the closeness between the insertion hole 10 and the outer surface of the water pipe 61 is lost and the water stoppage is lowered.
Moreover, since the rib which press-contacts along the outer surface of the water flow pipe 61 is formed in the contact part 8, the close_contact | adherence between the insertion hole 10 of the contact part 8 and the water flow pipe 61 increases, and a water stop effect Is further increased.

By the way, the pipe connector 1 of the above embodiment is provided with the abutting portion 8 formed by forming the insertion hole 10 of the water pipe 61 in the partition wall 9 inside. The abutting portion 8 may not be provided.
In addition, in the said embodiment, the pipe connector 1 and the corrugated protection pipe | tube 62 comprise the pipe connection apparatus, The part of the drawer | drawing-out part 5 of the pipe connector 1 of these corresponds to the connection part of a claim. It is also a thing.

<Second embodiment>
Next, the pipe connector of the second embodiment of the present invention will be described with reference to FIG. In this pipe connector, a part of the pipe connector 1 has a half structure.
In FIG. 8, the pipe connector 51 is formed in a cylindrical body, and the shape of the cross section orthogonal to the pipe axis of the outer wall 2 is formed in a substantially oval shape. The tube connector 51 is provided with a sheath tube attachment portion 3 to which an end portion of the corrugated sheath tube 63 is connected at one end portion in the tube axis direction, and the wave is inserted into the sheath tube attachment hole 4 of the sheath tube attachment portion 3. The end portion of the sheathed tube 63 is inserted, and the concave portion on the outer surface is locked to the peripheral edge 4a of the sheath tube mounting hole 4 so that the corrugated sheath tube 63 is connected in a retaining state. Here, the connector main body 52 that constitutes most of the pipe connector 51 including the sheath tube attachment portion 3 is not a halved structure, but is a cylindrical body having no split surface 12.

  On the other hand, a drawer portion 5 and a contact portion 8 having a halved structure similar to those of the pipe connector 1 of the above-described embodiment are integrally provided near the other end portion of the pipe connector 51 and the other end portion inside. Yes. The portion having the drawing portion 5 and the abutting portion 8 constitutes a connecting portion 53 including an upper half portion 54 and a lower half portion 55. The connecting portion 53 opens and closes via the first hinge 13 at the left end. In addition, the right end portion of the connection portion 53 is maintained in a state where the locked protrusion 24 and the locking piece 34 are locked and closed. The lower half portion 55 is integrally connected to the connector main body 52.

  That is, the pipe connector 51 includes a connector main body 52 on the side of the sheath tube attachment portion 3 that is not a half structure, and a connection portion 53 on the side of the drawer part 5 and the contact part 8 that has a half structure. And the pipe connector 51 is the same structure as the above-mentioned pipe connector 1 about structures other than the above. In addition, the upper half part 54 and the lower half part 55 that are divided vertically in the drawing part 5 and the contact part 8 in FIG. 8 correspond to a pair of half parts in the claims.

  The pipe connector 51 basically operates in the same manner as the pipe connector 1 of the first embodiment, and the connection hole 7 is formed in an elliptical shape. A protective tube 62 can be connected. Further, since the major axis of the elliptical connection hole 7 is formed in a direction perpendicular to the split surface 12, when the end of the corrugated protective tube 62 is deformed flat and connected to the connection hole, the original circle It is possible to avoid the generation of a gap in the split surface 12 due to the elastic return force to the tube shape.

  In FIG. 8, the pipe connector 51 has a halved structure of the connection portion 53 that is a portion of the drawer portion 5 and the contact portion 8, but only the portion of the drawer portion 5 can also be a halved structure. .

<Others>
By the way, although the connection hole 7 of each said embodiment is formed in elliptical shape, it is substantially elliptical shape similar to an ellipse, such as a track shape and an oval shape which connected the semicircle of both sides with two parallel lines. It may be formed into a thing. Further, since the connection hole 7 basically needs to be longer than the circumference of the bottom surface of the recess in the corrugated protective tube 62b having a large diameter, the connection hole 7 may be formed in a substantially horizontally long rectangular shape having arcuate surfaces at four corners. It is also possible to form holes that are asymmetrical on the left and right or top and bottom.

  Moreover, although the two connection holes 7 are independently formed in the drawer | drawing-out wall 6, you may form one piece or three or more regardless of the number. In addition, only a part of the plurality of connection holes may be formed in an elliptical shape and the other connection holes may be formed in a normal circular shape.

  Furthermore, in each said embodiment, although the connection hole 7 which can connect a corrugated pipe | tube of large and small diameter is provided only in the connection hole 7 which connects the corrugated protection pipe | tube 62 of the drawer part 5, it is a corrugated sheath. As for the sheath tube mounting hole 4 of the sheath tube mounting portion 3 to which the tube 63 is attached, an elliptical hole or a substantially elliptical hole having a half-axis structure in which a long axis is formed in a direction orthogonal to the split surface 12 is formed. You may enable it to connect the corrugated sheath pipe | tube 63 of a large and small diameter formed in the pipe | tube shape of a cross-sectional circle at the hole. Alternatively, in the tube connector, only the sheath tube mounting hole 4 of the sheath tube mounting portion 3 may be formed in the half-structured elliptical or substantially elliptical connection hole.

  In each of the above embodiments, the corrugated tube connected to the connection hole 7 having an elliptical shape or the like is connected to the connection hole 7 without or flattening the circular tube-shaped corrugated protection tube 62. As shown, when the corrugated tube has an elliptical shape or a substantially elliptical cross section that matches the elliptical or substantially elliptical connection hole 7, the connection hole 7 is left as it is without being deformed into a flat shape. Needless to say, it can also be connected.

  And although the corrugated pipe of the said embodiment is applied to the corrugated protective pipe 62 or the corrugated sheath pipe 63 which protects the water flow pipe 61, it is not restricted to these, Pipings, such as another resin pipe The same can be applied to corrugated pipes that protect wiring such as materials and cables. In addition, examples of instruments to which wiring such as a cable is connected include a wiring box, a switch box, and a hand hole buried in the ground.

In addition, the pipe connector 1 and the pipe connector 51 of the above embodiment rotate the first half 21 and the second half 31 about the first hinge 13, and the second half 31 The locking piece 34 is locked to the locked protrusion 24 of the first half 21 and formed into a cylindrical body, but is not limited to this locking structure. In addition, the pipe connector may be one in which two halves are separated from each other and formed into a cylindrical body by providing locking means at both end portions of each half.
Furthermore, although the pipe connector is formed in a cylindrical body having a substantially oval cross section, the present invention is not limited to this and may be formed in a square cylindrical body or the like.

1, 51 Pipe connector 53 Connection part
3 Shell tube mounting part 54 Upper half part 5 Drawer part 55 Lower half part 7 Connection hole 61 Water pipe
8 abutment portion 62 corrugated protective tube 8a, 8b rib 62a small diameter corrugated protective tube 12 split surface 62b large diameter corrugated protective tube 21 first half split 63 corrugated sheath tube
31 Second half L2 Length of long axis

Claims (5)

A pipe connector that is composed of a pair of halves or is formed of a cylindrical body having a pair of halves, and is connected to a corrugated pipe formed with irregularities that are continuous in the axial direction on the outer surface,
The pair of halves forming a connection hole to which the corrugated pipe is connected and a half opening that allows the corrugated pipe to be moved from the radial direction and disposed in the connection hole. A split surface between or a pair of halves,
The connection hole corresponds to the corrugated pipe of two types of large and small diameters,
In order to make the small diameter corrugated tube flat and connectable without flattening, and to make the large diameter corrugated tube flatter than the small diameter corrugated tube and connectable,
The pipe connection characterized in that the pair of halves or the pair of halves are closed to form an elliptical shape or a substantially elliptical shape, and the long axis is formed in a direction perpendicular to the split surface. Ingredients.   2. The pipe connector according to claim 1, wherein the corrugated pipes having two different sizes are corrugated pipes having different diameters due to differences in manufacturers and standards. The tubular body of the pipe connector is provided with a wall surface closing the opening at the end,
The pipe connector according to claim 1, wherein the connection hole is provided in the wall surface.   The pipe connector according to claim 3, wherein a plurality of the connection holes are provided to connect the plurality of corrugated pipes to at least one of the wall surfaces. The corrugated pipe having two kinds of large and small diameters according to claim 1 or 2, wherein irregularities that are continuous in the axial direction are formed on an outer surface;
A pipe connection device comprising the pipe connection device according to any one of claims 1 to 4.

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