JP6330081B1 - Square conduit fittings, connection structure for square conduits and square conduit fittings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a small-diameter portion of a rectangular conduit tube and a female fitting portion with a simple structure without using bolts or nuts and with one touch, Provided is a connection structure for a pipe joint for a rectangular conduit. A pipe joint 1 for a rectangular conduit mainly comprises a joint body 3 and a hook-shaped fixing member 5. The saddle-shaped fixing member 5 includes a top surface portion 7 and a pair of both foot portions 9. A small-diameter portion fixing portion 2 is formed on one side of the joint body 3. The small-diameter portion fixing portion 2 is a portion that fixes a tube small-diameter portion of a rectangular electric pipe described later. A male joint portion 4 is formed on the other side of the joint body 3. The male joint portion 4 functions as a fixing portion for a female fitting portion of a rectangular conduit described later. A connection wall 34 perpendicular to the pipe axis direction of the joint body 3 is formed between the small-diameter portion fixing part 2 and the male joint part 4 of the joint body 3. That is, the small-diameter portion fixing portion 2 and the male joint portion 4 are connected by the connection wall 34. [Selection] Figure 1

Description

  The present invention relates to a pipe joint for a rectangular electric pipe and a connection structure of the square electric pipe and a pipe joint for a square electric pipe for connecting the square electric pipes through which electric wires are inserted.

  For example, a round electric pipe having a circular cross section and a rectangular electric pipe having a rectangular cross section have been proposed as electric wire protection pipes for underground use. In the past, round electric conduits were used in many cases. However, as a conduit used in tunnels where the laying area of the conduit is narrow during construction, a rectangular conduit having a square cross section is used. It was used. The rectangular electric conduit is a corrugated electric conduit in which a square cross section and a circular cross section are alternately formed in order to impart flexibility.

  Also, when digging up the road and laying the conduit, using a rectangular conduit allows you to embed a plurality of adjacent conduits in contact with each other. Compared to laying, there is a feature that the amount of excavation of earth and sand is small and the construction is easy.

  For the connection between such square conduits, a pipe joint for a square conduit is used. For example, a pipe joint provided with a joint body made of a synthetic resin and a flange edge protruding in the outer circumferential direction from both end portions of a semicircular arc shape has been proposed (Patent Document 1).

  The joint main body of the pipe joint of Patent Document 1 has a concave groove that accepts a watertight packing at a portion between both side edges in the width direction. By tightening the bolt holes for fastening at both ends in the circumferential direction of the joint body, the joint body provided with the watertight packing can be fixed to the corrugated tubular body made of synthetic resin. According to the pipe joint of patent document 1, even if it is a case of a square-shaped electric pipe, it can connect.

  Further, a corrugated pipe end portion having a convex portion having a substantially square cross section in the pipe radial direction is inserted into a fitting cylinder portion having a substantially square cross section in the pipe radial direction in the pipe joint, and a pipe joint for connecting them is provided. It has been proposed (Patent Document 2).

  In the pipe joint of Patent Document 2, a latching piece made of a thin metal plate is provided on the inner wall surface of the fitting cylinder portion. By inserting the latching piece outwardly against the elastic force by the convex portion of the corrugated tube, the corrugated tube can be inserted into the fitting tube portion. At this time, the fitting tube of the corrugated tube is inserted into the gap between the adjacent convex portions of the corrugated tube inserted into the fitting tube portion by the elastic return force and engaged with the convex portion. It is possible to prevent the part from coming off. Therefore, it is possible to reliably prevent the corrugated tube from coming off, simplify the connection work, and suppress the outward protrusion of the corrugated tube from the convex portion as much as possible.

  In addition, a pipe joint using a retaining ring in which a plurality of retaining members are continuously provided in the circumferential direction and provided with hooking claws protruding on the outer peripheral surface of the ring has been proposed (for example, Patent Document 3). .

  In Patent Document 3, a retaining ring formed by connecting a plurality of retaining members in the circumferential direction is attached to a concave portion on the outer peripheral surface of the tube end portion of the corrugated synthetic resin tube. The pipe joint is provided with a socket portion made of a synthetic resin for receiving the pipe end portion of the corrugated synthetic resin pipe with the retaining ring attached. Further, a through hole is formed in the peripheral wall of the socket portion at a position corresponding to the latching claw of the retaining ring. When the pipe end of the corrugated synthetic resin pipe is inserted, the pipe joint of Patent Document 3 functions as a retaining stopper for the corrugated synthetic resin pipe by engaging the latching claw with the opening edge of the through hole.

  A half-shaped joint member having a substantially rectangular outer shape can also be used. In this case, the joint member is formed so as to integrally cover the large-diameter portion facing the small-diameter portion of the conduit tube. One of the fitting end portions of the half-shaped joint member is provided with a fitting foot portion, which can be fixed to each other by fitting the foot portion into a groove formed in the other end portion. Further, a water-expandable nonwoven fabric may be attached to the inner peripheral surface of the small diameter portion of the joint member.

In addition to this, a pipe joint in which a leaf spring is inclined upright on the inner surface on the opening side of the square tubular part of the pipe joint, or a pipe body is press-fitted into one end and a pipe is inserted into the other end. There is a pipe joint (Patent Document 4 ) that connects pipe bodies by spirally rotating the body and screwing. Furthermore, there is a pipe joint having a fixing part in which a locking member or a leaf spring is built inside the pipe joint on one side and a bell mouth on the other side (Patent Document 5 ).

JP 2000-337573 A JP 2005-172233 A JP 2010-270879 A JP 2004-007996 A JP 2007-037266 A

  However, in the method using a bolt as in Patent Document 1, the connection work is troublesome. For this reason, there is a demand for a pipe joint that can be fixed to a conduit tube with a single touch without using bolts or nuts and does not easily come off.

  In addition, the pipe joint of Patent Document 2 has a complicated retaining mechanism and cannot be easily fixed to a conduit tube with a single touch. When a pipe joint is manufactured, it is troublesome to fix a latching piece to the pipe joint. is there. Further, when a large pulling force is applied to the pipe joint, the connection part between the pipe joint and the latching piece may be buckled.

  Moreover, in patent document 3, although the latching claw is formed in the edge part of the corrugated pipe inserted, since the latching claw is used like patent document 2, when big extraction force was added to the pipe joint There is a possibility that the connecting portion between the pipe joint and the latching piece will buckle.

  In such a structure, it is necessary to provide a return part at the tip of the fitting foot, and since this return part protrudes outside the contour of the pipe joint, the pipe joint is subjected to external impacts, etc. In some cases, the joint may come off.

Further, the mechanism using the leaf spring as in Patent Document 5 has a complicated mechanism. Moreover, the pipe joint of patent document 4 can connect only the thing in which the unevenness | corrugation was formed helically.

  The present invention has been made in view of such a problem, and connects a small diameter portion of a rectangular conduit and a female fitting portion with a simple structure without using bolts and nuts and with a single touch. An object of the present invention is to provide a pipe joint for a rectangular conduit and a connection structure between the square conduit and the joint for a rectangular conduit.

In order to achieve the above-described object, the first invention has a male fitting portion and a female fitting portion at an end portion of a tubular body, and is provided between the male fitting portion and the female fitting portion. The tube of the rectangular electric pipe in which a tube large diameter portion as a plurality of substantially rectangular peaks and a tube small diameter portion as a circular trough are alternately formed on the outer peripheral surface of the tube A pipe joint that connects the small-diameter section of a rectangular conduit cut at a small-diameter section and the female fitting section of a rectangular conduit, and the pipe joint is formed by a joint body and a saddle-shaped fixing member. The hook-shaped fixing member is formed and has a top surface portion and both foot portions projecting downwardly connected so as to be substantially orthogonal to the top surface portion, and the bottom surface of the top surface portion includes the both foot portions and the Step portions projecting outward from the connection portion of the top surface portion are formed, respectively, and a small diameter portion fixing portion for fixing the small diameter portion of the tubular body is formed on one side of the joint body. The small-diameter portion fixing portion includes a tubular portion into which the tubular large-diameter portion disposed on both sides of the tubular small-diameter portion with the tubular small-diameter portion interposed therebetween, and further the tubular portion A cylindrical portion disposed on the back side of the cylindrical portion, and a part of the cylindrical portion is formed with a notch portion that opens above the side surface of the substantially rectangular portion and the top surface, and the saddle type fixing member when but that will be inserted from above into the notch parts, the upper side surface of the tubular portion, the stepped portion of the Π-type fixing member is mounted, the feet portions of the Π fixation member said joint body in Rukoto is inserted into an opening provided on both sides of the bottom portion of the tubular portion, said Π-type fixing member is fixed to the fitting body, on the other side of the joint body of the female fitting part A male joint portion is formed as a fixed portion, and the small-diameter portion fixed portion of the joint body and the male joint portion are arranged in the tube axis direction of the joint body. Straight connection wall is formed, which is the small-diameter portion fixing portion and the male coupling portion and the squareness conduit pipe fittings, characterized in Tei Rukoto connected by the connecting wall.

  The male joint portion includes a pair of locking walls that are spaced apart from each other in the tube axis direction, and a ring member that is disposed in a region sandwiched between the locking walls. The ring member is substantially C-shaped with a part cut in the circumferential direction, and the ring member has a reduced diameter part on one end side of the ring member and a slit in the circumferential direction with respect to the reduced diameter part. A plurality of claw portions that are spaced apart from each other via the ring, and the claw portions are gradually expanded in diameter so that the outer diameter gradually increases from the reduced diameter portion to the tip, and the ring The member is arranged such that the tip of the claw is located on the back side of the tube, and the reduced diameter portion is located on the tip of the tube, and the region sandwiched between the locking walls, A large-diameter portion of the male joint portion is formed at the distal end side of the tubular body, and the male mold is disposed on the base side of the tubular body in a region sandwiched by the locking walls. A small-diameter portion of the hand portion is formed, a slope portion is formed between the large-diameter portion of the male joint portion and the small-diameter portion of the male joint portion, and the ring member includes at least one of the locking walls. It is desirable that a clearance be provided between the ring member and the ring member is slidable in the tube axis direction in a region sandwiched between the locking walls.

  An engagement step portion is formed on the side of the tubular portion on the small diameter portion fixing portion side of the joint main body at a position corresponding to the notch portion, and the step portion of the saddle type fixing member An engagement portion may be formed at a lower position toward the outside of the both foot portions, and the engagement step portion and the engagement portion may be engaged with each other in the vertical direction.

  When the both foot portions of the hook-shaped fixing member are inserted into the opening of the small diameter portion fixing portion of the joint body, it is preferable that the both foot portions do not protrude from the outer surface of the bottom portion.

  The inner peripheral surface of the top surface portion of the saddle type fixing member may have a substantially arc shape or an arch shape.

  In the small diameter portion fixing portion of the joint body on the back side from the notch portion, a water stop member is disposed so as to surround the entire inner peripheral surface of the tubular portion, or the male joint portion A water stop member may be arranged further on the back side than the locking wall.

  The water stop member may be a water-expanded nonwoven fabric containing polyester fiber, sodium polyacrylate fiber, and a binder resin, or a rubber packing.

  The joint main body and the saddle-shaped fixing member may be made of any one of high-density polyethylene, polypropylene, ABS resin, PC resin, ABS resin, or PC resin polymer alloy.

  The length of the ring member in the tube axis direction is shorter than the sum of the lengths of the large-diameter portion of the male joint portion, the slope portion, and the small-diameter portion of the male joint portion, and the male joint portion. It is desirable that it is longer than both the sum of the lengths of the small diameter portion and the slope portion and the length of the large diameter portion of the male joint portion.

  According to the first invention, the rectangular electric pipe and the pipe joint can be fixed simply by inserting the saddle-shaped fixing member in a state where the rectangular electric pipe is inserted into one small-diameter portion fixing portion of the joint body. In addition, the other male joint portion of the joint body can be easily connected to a female fitting portion of a rectangular conduit having a female fitting portion at the end of the tube body. For this reason, a pipe joint can be fixed to a rectangular electric pipe with a single touch without using bolts or nuts.

  Moreover, since a ring member is arrange | positioned on the outer surface of a male type | mold joint part, a ring member can be visually recognized easily. Also, when inserting the male joint into the female fitting part of the square conduit, the diameter of the ring member is increased by the elastic repulsive force of the ring member, and the claw portion in the cross section in the tube axis direction. The ring member can be efficiently deformed by the effect of both of the diameter expansion due to the recovery of the bending deformation. For this reason, the insertability of the male joint is good.

  In particular, when the female fitting part and the male joint part are fitted, the ring member can move on the large diameter part of the two-stage structure of the male joint part. Furthermore, when the male joint part is pushed into the female fitting part, the end part of the female fitting part finally comes into contact with the claw part of the ring member, so that the female fitting part has a male type. The joint portion is restrained by the ring member, and the male joint portion effectively acts on the connection of the rectangular conduit.

  Moreover, it is a position corresponding to the notch part of a small diameter part fixing | fixed part, Comprising: By forming an engagement step part inside the side surface of a cylindrical part, it can be functioned as an engaging part with a saddle type fixing member. . For example, if the engaging portion is formed toward the outside of both feet at a predetermined position below the step portion of the saddle-shaped fixing member, the aforementioned engaging step portion and the engaging portion are engaged with each other in the vertical direction. Can be combined. For this reason, it can function as a retaining of the hook-shaped fixing member.

  Further, when the saddle-shaped fixing member is inserted into the opening of the small-diameter portion fixing portion, the both-foot portions of the saddle-shaped fixing member are prevented from projecting to the outer surface of the bottom portion of the small-diameter portion fixing portion. There is no contact with other members. For this reason, the hook-shaped fixing member does not come off even when the pipe joint is hit against another member.

  Moreover, it can be set as the shape corresponding to the circular small diameter part of a square-shaped electric pipe by making the internal peripheral surface of the top | upper surface part of a saddle type fixing member into a substantially circular arc shape or an arch shape.

  In addition, by arranging a water-stopping member so as to surround the entire inner peripheral surface of the cylindrical portion of the joint body on the back side from the notch part or further on the back side than the locking wall of the male joint part, It is possible to ensure the water stoppage of the gap between the conduit and the pipe joint.

  Further, if a water expansion member or rubber packing is used as the water stop member, water stoppage can be reliably ensured.

  In addition, by selecting the material of the joint body and the saddle-shaped fixing member so as to be either high-density polyethylene, polypropylene, ABS resin, PC resin, ABS resin, or PC resin polymer alloy, sufficient rigidity can be obtained. Can be secured.

  Further, the length of the ring member in the tube axis direction is shorter than the sum of the lengths of the large-diameter portion, the slope portion, and the small-diameter portion of the male joint portion, and the sum of the lengths of the small-diameter portion and the slope portion and By making it longer than any length of the large diameter portion, the ring member 6 can be slidable in the tube axis direction at the ring member arrangement portion. Moreover, since the dimension of a ring member is larger than the sum of the length of a small diameter part and a slope part, a ring member does not enter into a small diameter part and a slope part as a whole.

  According to a second aspect of the present invention, there is provided a large-diameter portion of the tubular body as a plurality of substantially rectangular ridges on the outer peripheral surface of the tubular body at one end portion of the pipe joint for a rectangular conduit according to the first aspect of the invention. A rectangular electric pipe formed by alternately forming the tubular small-diameter parts as circular valleys, and connecting the square electric pipes cut at the small-diameter tubular parts, and connecting the other of the pipe joints for the square electric pipes On the male joint portion at the end, formed on the inner peripheral portion of the tubular body, from the distal end side, a female side tubular portion, and a female side inclined portion that gradually decreases in diameter from the female side tubular portion, A connecting structure for a square conduit and a joint for a rectangular conduit, wherein the female fitting is provided with a ring fitting that is expanded from a minimum inner diameter portion of the female slope portion. It is.

  Fixing the rectangular electric wire pipe cut at the small diameter portion of the tubular body to one end of the pipe joint is performed by fitting the saddle-shaped fixing member and the joint body, and the female fitting section The pipe joint may be fixed to the male joint part by fitting the ring fitting part and the ring member.

  The ring member has a taper portion that decreases in diameter from the tip of the claw portion toward the reduced diameter portion in a cross section in the tube axis direction, and the wall thickness decreases from the tip of the claw portion toward the reduced diameter portion. It may be a wedge-shaped shape.

  A slide guide that protrudes in parallel with the pipe axis direction from the reduced diameter portion along the outer periphery of the large diameter portion of the male joint portion is provided in a portion of the ring member where the claw portion is not provided. Alternatively, a ring member connection portion may be formed on both ends of the ring member in the circumferential direction so as to overlap and connect the ends.

  You may form the thickness inside the said outer edge part thinly with respect to the thickness of the outer edge part of the nail | claw surface of the nail | claw part of the said ring member.

  According to the second invention, it is possible to connect the small-diameter portion of the rectangular electric pipe and the pipe joint simply by inserting the saddle-shaped fixing member in a state where the rectangular electric pipe is inserted into the small-diameter portion fixing portion. In addition, the square conduit and the pipe joint can be connected by simply inserting the male joint into the female fitting portion of the square conduit. For this reason, the connection structure of a rectangular electric pipe and a pipe joint can be obtained easily.

  In this case, the rectangular electric pipe cut | disconnected by the small diameter part of the pipe body can be fixed to one end part of the pipe joint by fitting the saddle type fixing member and the small diameter part fixing part. Further, the female fitting portion and the male joint portion are fixed by fitting the ring fitting portion of the female fitting portion and the ring member of the male fitting portion at one end of the rectangular conduit. be able to.

  Further, when the ring member is reduced in diameter by making the ring member into an acute wedge shape whose thickness decreases from the tip of the claw portion toward the reduced diameter portion, the inner diameter side of the reduced diameter portion of the ring member and Using the contact portion with the large diameter portion as a fulcrum, the ring member can be rotated so as to fall down, and the ring member can be elastically deformed to reduce the diameter.

  Further, since the slide guide is formed on the ring member or the ring member connecting portion is formed, the large diameter portion of the male joint portion can be stably held and the ring member can be slid. Further, by adjusting the connection position of the ring member connecting portion, it is possible to adjust the circumference of the reduced diameter portion of the ring member.

  In addition, by forming the inner thickness of the outer edge portion thinner than the thickness of the outer edge portion of the claw surface, it is possible to reduce the insertion resistance when inserting the male joint portion into the female fitting portion. it can. Even when a pulling force is applied to the joint portion, the thickness of the outer edge portion of the nail surface is formed to be thicker than the thickness inside the outer edge portion, so that the nail portion does not buckle.

  According to the present invention, it is possible to connect a small-diameter portion of a rectangular conduit tube and a female fitting portion with a simple structure without using bolts or nuts and with one touch, It is possible to provide a connection structure for a pipe joint for a rectangular conduit and a square conduit.

FIG. 2 is an exploded perspective view of the pipe joint 1. (A) is a side view of the joint body 3, and (b) is a bottom view of the joint body 3. (A) is a side view of the pipe joint 1, (b) is sectional drawing of (a). The expanded sectional view of the male type | mold joint part 4. FIG. FIG. 6 is a partially enlarged cross-sectional view of the ring member 6. The perspective view which shows the ring member 6a. The figure which shows the square-shaped electric conduit 40. FIG. (A) is the MM sectional view taken on the line of FIG. 7, (b) is the NN sectional view taken on the line of FIG. FIG. 8 is an enlarged cross-sectional view of a portion O in FIG. The figure which shows the connection method of the male type joint part 4 and the female type fitting part 43. FIG. (A), (b) is a figure which shows the connection method of the male type joint part 4 and the female type fitting part 43. FIG. (A), (b) is the H section enlarged view of Drawing 11 (b), and is a figure showing the connection method of male type joint part 4 and female type fitting part 43. (A) is a figure which shows the connection method of the male type joint part 4 and the female type fitting part 43, (b) is a figure which shows the connection structure 10 of the male type fitting part 4 and the female type fitting part 43. (A) is a figure which shows the cutting method of the square-shaped electric conduit 40, (b) is an enlarged view of the tubular body small diameter part 45 of (a). (A) is the figure which shows the cut | disconnected square-shaped electric conduit 40, (b) is an enlarged view of the tubular body small diameter part 45 of (a). (A), (b) is a figure which shows the connection method of the cut | disconnected square-shaped electric conduit 40 and the small diameter part fixing | fixed part 2. FIG. (A), (b) is a figure which shows the connection method of the cut | disconnected square-shaped electric conduit 40 and the small diameter part fixing | fixed part 2. FIG. (A) is the KK sectional view taken on the line of Fig.17 (a), (b) is the LL sectional view taken on the line of Fig.17 (a).

  Hereinafter, a pipe joint 1 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing the pipe joint 1. In the perspective view, configurations of a ring member and the like which will be described later are omitted. A pipe joint 1 for a rectangular electric pipe mainly includes a joint body 3 and a hook-shaped fixing member 5.

  The saddle-shaped fixing member 5 includes a top surface portion 7 and a pair of both foot portions 9. The both foot portions 9 are connected in the vicinity of both end portions of the top surface portion 7 so as to be substantially orthogonal to the top surface portion 7 and project downward. Steps 11 are provided on both sides of the saddle-shaped fixing member 5. The step portion 11 is formed downward so that the upper portion protrudes in both directions. That is, on the lower surface (downward) of the top surface portion 7, step portions 11 are formed that protrude outward from the connecting portions of the both foot portions 9 and the top surface portion 7. The step portion 11 is formed substantially parallel to the pipe axis direction of the joint body 3.

  An engaging portion 27 is formed at a predetermined position below the step portion 11 of the saddle-shaped fixing member 5 toward the outside of both feet 9. The engaging part 27 is formed so that the lower part projects in both directions. Note that the engaging portion 27 and the stepped portion 11 are formed substantially parallel to each other.

  The inner peripheral surface of the top surface portion 7 of the saddle-shaped fixing member 5 has a substantially arc shape or an arch shape. The shape of the inner peripheral surface of the top surface portion 7 is a shape corresponding to the outer shape of the small-diameter portion of the rectangular conduit described later.

  FIG. 2A is a side view of the joint body 3 and FIG. 2B is a bottom view of the joint body 3. A small-diameter portion fixing portion 2 is formed on one side of the joint body 3. The small-diameter portion fixing portion 2 is a portion that fixes a tube small-diameter portion of a rectangular electric pipe described later. A male joint portion 4 is formed on the other side of the joint body 3. The male joint portion 4 functions as a fixing portion for a female fitting portion of a rectangular conduit described later. A connection wall 34 perpendicular to the pipe axis direction of the joint body 3 is formed between the small-diameter portion fixing part 2 and the male joint part 4 of the joint body 3. That is, the small-diameter portion fixing portion 2 and the male joint portion 4 are connected by the connection wall 34.

  First, the small diameter portion fixing portion 2 will be described in detail. The small-diameter portion fixing portion 2 includes a substantially rectangular tubular portion 15 and a cylindrical portion 13 disposed on the inner side (the male joint portion 4 side) of the tubular portion 15. The cylindrical portion 13 is a portion into which a tubular small diameter portion of a rectangular electric tube described later is inserted, and the cylindrical portion 15 is a large tubular body disposed on both sides of the small tubular portion with the small tubular portion interposed therebetween. This is a portion into which a diameter portion or the like is inserted. In addition, since the two ribs formed in the outer peripheral part by the side of the male joint part 4 (between the cylindrical part 13 and the notch part 17) of the cylindrical part 15 are not necessarily required, the said rib may be provided. However, it may not be provided.

  A part of the cylindrical portion 15 is formed with a notch 17 above the side surface 19 of the substantially rectangular portion and the top surface 21 is opened. In addition, openings 23 are provided on both sides of a substantially rectangular bottom 29 of the cylindrical portion 15 of the small diameter portion fixing portion 2. The opening 23 is formed at a position corresponding to the notch 17 with respect to the pipe axis direction of the joint body 3.

  FIG. 3A is a side view of the pipe joint 1, and FIG. 3B is a cross-sectional view of the pipe joint 1. The saddle type fixing member 5 is inserted into the notch 17 from above the joint body 3. At this time, the step portion 11 of the saddle type fixing member 5 is placed on the upper portion of the side surface 19 of the cylindrical portion 15. Further, the distal ends of both foot portions 9 of the hook-shaped fixing member 5 are inserted into the openings 23 provided on both sides of the bottom portion 29 of the tubular portion 15 of the joint body 3, and the hook-shaped fixing member 5 is fixed to the joint body 3. Is done.

  An engagement step portion 25 is formed inside the side surface 19 of the cylindrical portion 15 at the position corresponding to the notch portion 17 on the small diameter portion fixing portion 2 side of the joint body 3. The engagement step portion 25 is formed by a protrusion that protrudes inward substantially parallel to the pipe axis direction of the joint body 3. The engaging step portion 25 engages with the engaging portion 27 of the vertical fixing member 5 in the vertical direction.

  Here, when the both foot portions 9 of the saddle-shaped fixing member 5 are inserted into the notch portions 17, the engaging portions 27 projecting outward from the side surfaces of the both foot portions 9 and formed upward, and the small-diameter portion fixing portion 2. The engaging step portion 25 formed downward is in contact with the inner surface of the portion corresponding to the notch portion 17. At this time, since the saddle-shaped fixing member 5 is made of resin, the distance between the both foot portions 9 is reduced by elastic deformation. Further, when the scissor-type fixing member 5 is inserted deeply into the notch part 17 and the engaging part 27 gets over the engaging step part 25, both legs 9 are expanded in diameter by the elastic force, and the scissor-type fixing member 5 is It is inserted into the opening 23. At this time, the engaging step portion 25 and the engaging portion 27 engage with each other in the vertical direction.

  It should be noted that when the both foot portions 9 of the saddle-shaped fixing member 5 are inserted into the openings 23 formed in the small diameter portion fixing portion 2, the tips of the both foot portions 9 do not protrude to the outer surface of the bottom portion 29. That is, the length from the step portion 11 of the saddle-shaped fixing member 5 to the tips of the both foot portions 9 is equal to or less than the distance from the upper edge portion of the cutout portion 17 of the side surface 19 in contact with the step portion 11 to the lower surface of the bottom portion 29. is there. By doing in this way, it can prevent that the front-end | tip of both the leg parts 9 protrudes from the bottom part 29, and contacts with another member etc. Therefore, even when the rectangular electric pipes are stacked, the tip of both legs 9 of the saddle-shaped fixing member 5 comes into contact with the lower rectangular electric pipe or the like, and the saddle-type fixing member 5 comes off due to the reaction caused by the contact. There is no.

  Further, as shown in FIG. 3B, the small-diameter portion fixing portion 2 on the back side (the male joint portion 4 side) from the notch portion 17 surrounds the entire inner peripheral surface of the cylindrical portion 15. A water stop member 31 is disposed. In addition, the water stop member 31 may be arrange | positioned in the back | inner side (small diameter part fixing | fixed part 2 side) further than the locking wall 8 of the male coupling part 4. FIG.

  The water stop member 31 is, for example, a water expansion member, and in this case, a nonwoven fabric including polyester fiber, sodium polyacrylate fiber, and binder resin can be applied. Further, the water stop member 31 may be a rubber packing.

  The pipe joint 1 including the small-diameter portion fixing portion 2 and the saddle-shaped fixing member 5 are preferably made of either high density polyethylene, polypropylene, ABS resin, PC resin, ABS resin, or a polymer alloy of PC resin. Other resins can be used as long as they have a predetermined strength.

  Next, the male joint portion 4 will be described in detail. FIG. 4 is a partially enlarged cross-sectional view of FIG. The male joint portion 4 includes a ring member 6 and a water stop member 32. The male joint portion 4 is formed on the outer peripheral portion near the end portion of the pipe joint 1.

  As shown in FIG. 4, a locking wall 8, a ring member disposing portion 12, a locking wall 8, and a water stop member accommodating portion 26 are formed at the end of the male joint portion 4 in order from the tip. In the following description, the opening side (in the direction of arrow B in the figure) of the male joint part 4 is defined as the tip side of the male joint part 4, and the opposite side (in the direction of arrow A in the figure) is the male joint. It is defined as the base side of the part 4. The locking wall 8 is a site having a larger outer diameter than the surroundings. The pair of locking walls 8 are spaced apart from each other in the tube axis direction and regulate the operating range of the ring member 6.

  A region sandwiched between the pair of locking walls 8 is a ring member placement portion 12 in which the ring member 6 is placed. That is, the male joint portion 4 includes a pair of locking walls 8 that are spaced apart in the tube axis direction, and a ring member 6 that is disposed in a region sandwiched between the locking walls 8. The ring member arrangement portion 12 includes a large diameter portion 14, a slope portion 16, and a small diameter portion 18 in order from the distal end side of the male joint portion 4. That is, a large-diameter portion 14 is formed on the distal end side of the male joint portion 4 in the region sandwiched between the pair of locking walls 8, and the male joint portion 4 in the region sandwiched between the pair of locking walls 8. A small diameter portion 18 is formed on the base side, and a slope portion 16 is formed between the large diameter portion 14 and the small diameter portion 18. The outer diameter of the large diameter portion 14 is smaller than the locking wall 8 and larger than the small diameter portion 18.

  A water stop member accommodating portion 26 is provided on the base side of the ring member arrangement portion 12. As shown in FIG. 3, the water stop member accommodating portion 26 is a groove having a substantially rectangular cross section, and the water stop member 32 is accommodated in the water stop member accommodating portion 26. That is, the water stop member 32 is provided on the base side further than the locking wall 8 on the base side of the male joint part 4. The water stop member 32 is an annular member, and the inner diameter of the water stop member 32 is smaller than the outer diameter of the water stop member accommodation portion 26, and the inner surface of the water stop member 32 is the outer surface of the water stop member accommodation portion 26. In close contact.

  The water-stop member 32 has a shape in which the inner peripheral portion of the cross-sectional shape is linear (substantially the same diameter in the tube axis direction), and the outer peripheral portion has a sloped portion from one end in the tube axis direction to the other. . As shown in FIG. 4, the maximum outer diameter portion of the water stop member 32 is arranged toward the base side of the tube body 49, and the outer diameter of the portion is the maximum of the tube body 49 in the male joint portion 4. The water stop member 32 is larger than the outer diameter and protrudes outward in the radial direction.

  The water stop member 32 is made of, for example, rubber or a water expansion member. When the water stop member 32 is made of rubber, for example, ethylene propylene rubber (Ethylene Propylene Rubber) is applicable. Ethylene propylene rubber is a kind of synthetic rubber obtained by copolymerization of ethylene and propylene. In order to enable vulcanization with a sulfur compound, it is often used as an EPDM rubber obtained by copolymerizing a small amount of a diene monomer with ethylene propylene rubber. In addition, SBR, CR, NBR, ACM rubber, EPDM / PP dynamic cross-linked elastomer, and the like can also be used.

  When the water stop member 32 is formed of a water expansion member, the water stop member 32 is provided with a water expansion member on the outer periphery of the water stop member accommodating portion 26 in parallel with the tube axis direction. For example, a nonwoven fabric made of polyester fibers and sodium polyacrylate fibers can be used. In this case, the proportion of the polyester fiber and sodium polyacrylate is 30% to 70%, preferably 50 to 70% by mass when the total of both is 100% by mass. .

  Here, for the water-expandable nonwoven fabric, it is desirable to use a binder resin that is a low-melting resin in a range of 1 to 10%, more desirably, based on the total of both polyester fibers and sodium polyacrylate fibers. Is 1-5%. For example, as the binder resin, low melting point polyester can be used, and the nonwoven fabric can be formed by a needle punch method.

  The ring member 6 is arranged in the ring member arrangement portion 12. The ring member 6 has a substantially annular shape, and has a substantially C shape in which a part in the circumferential direction is cut by a cutting portion 36 (see FIG. 3A).

  FIG. 5 is a diagram showing details of the cross-sectional shape of the ring member 6. One end portion side of the ring member 6 is a reduced diameter portion 22 having an outer diameter smaller than that of other portions. A plurality of claw portions 24 are provided toward the other end portion side of the ring member 6. The plurality of claw portions 24 are provided separately from each other with respect to the reduced diameter portion 22 in the circumferential direction through slits 38 (see FIG. 3A).

  Further, the claw portion 24 is expanded in diameter so that the outer diameter gradually increases from the reduced diameter portion 22 toward the tip. That is, the ring member 6 has a taper portion 33 that decreases in diameter from the tip of the claw portion 24 toward the reduced diameter portion 22 in the cross section in the tube axis direction. The ring member 6 has an acute wedge shape in which the inner peripheral portion is bent and formed in two stages, and the thickness decreases from the tip of the claw portion 24 toward the reduced diameter portion 22.

  As shown in FIG. 3A, the ring member 6 is arranged such that the tip of the claw portion 24 is located on the base side of the tube body 49 and the reduced diameter portion 22 faces the tip side of the tube body 49. . The ring member 6 is held between the locking walls 8 because the inner diameter of the ring member 6 is smaller than the outer diameter of the locking walls 8.

  For the ring member 6, for example, ABS resin (acrylonitrile butadiene styrene copolymer), PP resin, hard vinyl chloride, or any of these and PC resin mixed resin or polymer alloy can be applied, and ABS resin is applied. It is desirable to do.

  As shown in FIG. 4, the length of the ring member 6 in the tube axis direction (C in the figure) is the length of the ring member arrangement part 12 (D in the figure, including the large diameter part 14, the slope part 16, and the small diameter). Shorter than the sum of the lengths of the portions 18). Further, the length of the ring member 6 in the tube axis direction (C in the drawing) is longer than the sum of the lengths of the small diameter portion 18 and the slope portion 16 (E in the drawing), and the length of the large diameter portion 14 (in the drawing). Longer than DE). Therefore, the ring member 6 has a clearance 28 between at least one of the locking walls 8 in a state where the ring member 6 is arranged in the ring member arrangement portion 12. For this reason, the ring member 6 is slidable in the tube axis direction at the ring member arrangement portion 12.

  Thus, the reduced diameter portion 22 which is a side end portion of the ring member 6 is attached so as to be positioned on the large diameter portion 14 and slides on the large diameter portion 14. However, since the dimension of the ring member 6 is larger than the sum of the lengths of the small diameter portion 18 and the slope portion 16, the ring member 6 does not enter the small diameter portion 18 and the slope portion 16 as a whole.

  Instead of the ring member 6, a ring member 6a shown in FIG. 6 may be used. The ring member 6 a has substantially the same configuration as the ring member 6, but differs in that a slide guide 61 and a ring member connection portion 63 are formed. A slide guide 61 is formed from the reduced diameter portion 22 toward the other end portion of the ring member 6a where the claw portion 24 is not provided.

  The slide guide 61 is not formed so as to increase in diameter from the reduced diameter portion 22 toward the other end as in the claw portion 24, but is formed substantially parallel to the axial direction of the ring member 6a. Therefore, when the ring member 6 a is mounted on the male joint portion 4 of the pipe joint 1, the slide guide 61 projects from the reduced diameter portion 22 in parallel to the pipe axis direction on the outer periphery of the large diameter portion 14.

  In addition, the ring member 6a is formed with ring member connection portions 63 that are connected to each other with both ends overlapped with each other at both ends in the circumferential direction of the substantially C-shaped member. To each ring member connecting portion 63 at both ends, teeth are formed on the mutually opposing surfaces, and the circumferential ends of the ring member 6a are connected by meshing the teeth. At this time, the opening diameter of the reduced diameter portion of the ring member 6a is adjusted to the outer peripheral size of the large diameter portion 14 of the male joint portion 4 by adjusting the position where the teeth on the opposing surfaces of the ring member connecting portion 63 mesh with each other. Can be adjusted to fit. When the ring member 6a slides and moves the large-diameter portion 14 of the male joint portion 4 by providing the slide guide 61 on the ring member 6a or connecting the ends of the ring member 6a to each other, the ring member 6a does not tilt with respect to the large-diameter portion 14, and can be slid in a state where the large-diameter portion 14 is stably held.

  Further, on the outer surface side of the claw portion 24, the thin portion 65 may be formed inside the outer edge portion with respect to the outer edge portion of the claw portion 24. Thus, by forming the inner thickness of the outer edge portion thinner than the outer edge portion of the nail surface of the nail portion 24, the insertion resistance when inserting the male joint portion 4 into the female fitting portion is reduced. Can be reduced. Even when a pulling force is applied to the joint portion of the rectangular conduit, the claw portion 24 does not buckle because the outer edge portion of the claw surface is thicker than the inside.

  In addition, the ring member connection part 63 may affix the opposing surface of a mutual overlapping part with a double-sided tape instead of the tooth | gear mentioned above. Or you may provide the unevenness | corrugation of the periodic structure for an engagement in the circumferential direction on the opposing surface of a superposition part, and an unevenness | corrugation may mutually be engaged. For example, an engagement portion having a periodic structure having a triangular wave shape may be formed in the circumferential direction. The ring member connection portion 63 may be connected by any other known method.

  Next, the square electric conduit 40 connected by the pipe joint 1 will be described. In the following description, an example in which the ring member 6 is applied will be described unless otherwise specified. FIG. 7 is a side view showing the square conduit 40. Moreover, Fig.8 (a) is radial direction sectional drawing of the square-shaped electric conduit 40, Comprising: It is the MM sectional view taken on the line of FIG. Moreover, FIG.8 (b) is radial direction sectional drawing of the square conduit 40, Comprising: It is the NN sectional view taken on the line of FIG.

  The rectangular conduit 40 is mainly composed of a tube body 49, a male fitting portion 41, a female fitting portion 43, and the like. In the rectangular electric conduit 40, a male fitting portion 41 is provided at one end of a tube body 49, and a female fitting portion 43 is provided at the other end. The male fitting portion 41 and the female fitting portion 43 serve as a connection portion with another rectangular conduit 40. That is, a female fitting portion 43 and a male fitting portion 41 are formed at both ends of the rectangular conduit 40 as connecting portions.

  The tube body 49 is sandwiched between the male fitting portion 41 and the female fitting portion 43. The tube body 49 is a resin tube having flexibility. Although the material of the pipe body 49 is not ask | required, it is desirable that it is made from a high density polyethylene, for example.

  A plurality of large tube diameter portions 44 and small tube diameter portions 45 are alternately formed on the outer peripheral surface of the tube body 49 in the tube axis direction. As shown in FIG. 8A, the tubular large diameter portion 44 has a substantially square cross section. Moreover, as shown in FIG.8 (b), the cross-sectional shape of the tubular body small diameter part 45 is formed in circular shape. That is, between the male fitting part 41 and the female fitting part 43, a tubular large-diameter part 44 as a plurality of substantially rectangular peaks on the outer peripheral surface of the tubular body 49, and a circular trough part The tube small diameter portions 45 are alternately formed.

  In addition, the diameter (the length of one side of the square) of the large tube diameter portion 44 is larger than the outer diameter of the small tube diameter portion 45. Thus, by providing the substantially square tubular body large-diameter portion 44, the square electric conduits 40 can be stably arranged when the rectangular electric conduits 40 are stacked. Note that the maximum outer diameter of the female fitting portion 43 is smaller than the diameter (length of one side) of the large tube diameter portion 44. Therefore, when viewed from the end on the female fitting portion 43 side, the female fitting portion 43 does not protrude from the outer periphery of the tubular body large diameter portion 44. Therefore, when the rectangular electric pipes 40 are stacked by bringing the large tube diameter parts 44 into contact with each other, the female fitting part 43 does not interfere with the adjacent rectangular electric pipes 40.

  FIG. 9 is a cross-sectional view in the tube axis direction at portion O in FIG. As shown in FIG. 9, a pair of protrusions 51 are formed at a substantially central portion of the tube body small diameter portion 45 with respect to the tube axis direction of the tube body 49. A groove 53 is formed between the protrusions 51 in the axial cross section of the tube body 49. That is, two projecting portions 51 projecting in the outer peripheral direction at approximately the center in the tube axis direction of each tubular small diameter portion 45 of the square electric conduit 40 and symmetrically formed opposite to each other, A groove 53 is formed at the center between them.

  Due to the material movement at the time of forming the tube body 49, a dent is formed on the inner surface of the tube body 49 so that the inner surface corresponding to the position of the protrusion 51 is slightly larger in diameter. Further, since the surface of the groove 53 is formed in substantially the same manner as the small tube diameter portion 45, the back surface of the groove 53 is formed in the same shape as the normal small tube diameter portion 45 in which the protrusion 51 is not formed. That is, no projections or the like are formed on the inner surface side of the tube body 49 (tubular small diameter portion 45) at the portions corresponding to the protrusions 51 and the grooves 53. As described above, since no projections are formed on the inner surface side of the tube body 49, the insertion of the electric wire or the like into the rectangular electric conduit 40 is not hindered.

  Moreover, the square-shaped electric conduit 40 is formed by blow molding, for example. At this time, when the thickness distribution of the material at the time of blow molding is taken into consideration, the back surface of the protrusion 51 is formed to be depressed due to the movement of the material at the time of blow molding.

  The male fitting portion 41 has substantially the same configuration as the male fitting portion 4 of the pipe joint 1 described above, and is formed on the outer peripheral portion in the vicinity of one end portion of the pipe body 49. The male fitting portion 41 is provided with a ring member 47 and a water stop member 48 in order from the tip of the tube body 49. The ring member 47 is a member having a substantially C-shaped cross section, for example, and can be reduced in diameter by elastic deformation. In addition, a plurality of claws are formed on the outer periphery of the ring member 47 and can be engaged with an inner surface protrusion of a female fitting portion 43 described later.

  The water stop member 48 is an annular member, and the inner diameter of the water stop member 48 is smaller than the outer diameter of the mounting portion of the water stop member 48 in the male fitting portion 41. For this reason, the inner surface of the water stop member 48 is in close contact with the outer surface of the male fitting portion 41. Further, the water stop member 48 is formed in the male fitting portion 41 so as to protrude outward in the radial direction with a predetermined dimension. When the male fitting part 41 is inserted into the female fitting part 43, the outer surface of the water-stopping member 48 comes into contact with the inner surface of the female fitting part 43, thereby ensuring water stoppage. The water stop member 48 is made of, for example, rubber or a water expansion member.

  The female fitting portion 43 has a protrusion that can engage with the ring member 47 on the inner surface. The male fitting portion 41 and the female fitting portion 43 of the pair of rectangular conduits 40 are opposed to each other, and the male fitting portion 41 is inserted into the female fitting portion 43 to connect them. Can do. The structure of the female fitting part 43 will be described later.

  In the present invention, the structures of the male fitting part 41 and the female fitting part 43 are not particularly limited. Any known structure is applicable as long as the male fitting part 41 can be inserted into and connected to the female fitting part 43.

  Next, a method for connecting the male joint portion 4 of the pipe joint 1 and the female fitting portion 43 will be described. FIG. 10 is a view showing a state in which the male joint portion 4 and the female fitting portion 43 are arranged to face each other and the male fitting portion 4 is inserted into the female fitting portion 43. First, as shown in FIG. 10, the distal end of the male joint portion 4 is inserted into the female fitting portion 43.

  The female fitting portion 43 is formed on the inner peripheral portion of the distal end portion (opening portion) of the tube body 49. The female fitting portion 43 includes, in order from the tip side, a female side tubular portion 35, a female side slope portion 37 that gradually decreases in diameter from the female side tubular portion 35, and a minimum inner diameter portion of the female side slope portion 37. A ring fitting portion 39 having a diameter increased from

  As shown in FIG. 11A, when the male joint portion 4 is pushed into the female fitting portion 43 from this state (arrow F in the figure), a ring is formed on the female slope portion 37 of the female fitting portion 43. The taper portion 33 on the outer periphery of the ring member 6 arranged in the member arrangement portion 12 comes into contact. Further, when the male joint portion 4 is pushed into the female fitting portion 43, the vicinity of the reduced diameter portion 22 of the ring member 6 slides to the vicinity of the slope portion 16 of the male joint portion 4 as shown in FIG. It can be moved (arrow G in the figure).

  Fig.12 (a) is an enlarged view of the ring member 6 vicinity in this state, and is the H section enlarged view of FIG.11 (b). The ring member 6 can slide in the ring member placement portion 12 until the tip of the claw portion 24 comes into contact with the locking wall 8. At this time, since the length of the ring member 6 is longer than the length of the small diameter portion 18, the end portion on the reduced diameter portion 22 side of the ring member 6 is located on the large diameter portion 14.

  As shown in FIG. 12B, when the male joint portion 4 is pushed into the female fitting portion 43 from this state (arrow F in the figure), the slope portion 16 of the male joint portion 4 and the ring member 6 are large. Using the contact portion with the diameter portion 14 as a fulcrum, the claw portion 24 rotates so as to fall in the tube axis direction, and can be elastically deformed to reduce the diameter (arrow I in the figure). That is, the claw portion 24 of the ring member 6 is rotated so as to fall in the tube axis direction with the contact portion between the inner peripheral side of the reduced diameter portion 22 of the ring member 6 and the large diameter portion 14 of the male joint portion 4 as a fulcrum. Can be made. Therefore, a part of the claw portion 24 in the vicinity of the distal end portion can be stored in the small diameter portion 18 of the male joint portion 4.

  As shown in FIG. 13A, when the male joint portion 4 is further pushed into the female fitting portion 43 from this state (arrow F in the figure), the end portion of the claw portion 24 is the female fitting portion 43. It passes through the female slope portion 37. At this time, the claw portion 24 that has been elastically deformed is released from the pressure from the female-side inclined surface portion 37 and is restored to its original diameter and expanded in diameter (arrow J in the figure). Thereby, the claw portion 24 is accommodated in the ring fitting portion 39 formed on the base side of the female slope portion 37 of the female fitting portion 43.

  FIG. 13B is a view showing the connection structure 10 obtained by connecting the male joint portion 4 and the female fitting portion 43, thus obtained. In this state, the tip of the claw portion 24 is fitted with the ring fitting portion 39 of the female fitting portion 43. For this reason, even if it is going to pull out the female fitting part 43 (arrow K in the figure), the movement of the ring member 6 is restricted by the locking wall 8, and the male joint part 4 is pulled out from the female fitting part 43. It will not be.

  In this state, the outer peripheral surface of the water stop member 32 is in close contact with the inner surface of the female cylindrical portion 35 of the female fitting portion 43. That is, the gap between the male joint portion 4 and the female fitting portion 43 can be filled with the water stop member 32. For this reason, it is possible to prevent moisture from entering the connection structure 10 from the outside.

  Further, since the water stop member 32 is arranged on the base side from the ring member 6, the female fitting portion 43 and the water stop member 32 are pushed when the male joint portion 4 is pushed into the female fitting portion 43. Until contact is made, resistance by the water stop member 32 is not received. For this reason, the pushing resistance to the female type fitting part 43 of the male type joint part 4 can be made small. Although details are omitted, the connection between the male fitting portion 41 and the female fitting portion 43 is also performed according to the same principle.

  Next, a method for cutting the rectangular conduit 40 will be described. As shown to Fig.14 (a), the square-shaped electric conduit 40 can be cut | disconnected by predetermined length with the blades 55, such as a saw. At this time, the tube body small-diameter portion 45 is provided with two protruding portions 51 facing each other, and a groove 53 is formed between the protruding portions 51, so that the blade 55 can be used along the groove 53.

  FIG. 14B is an enlarged cross-sectional view of the small tube diameter portion 45 of FIG. As shown in FIG. 14B, when cutting the rectangular conduit 40, the tip of the blade 55 is aligned with the groove 53. Therefore, the cutting position can be accurately grasped. Thus, the rectangular electric conduit 40 can easily grasp the cutting position and can prevent the blade 55 from sliding. For this reason, the tip position of the blade 55 does not deviate from the groove 53, and the shift of the cutting position or the oblique cutting is not caused.

  Fig.15 (a) is a figure which shows the square-shaped electric conduit 40 after a cutting | disconnection. By cutting the rectangular electric pipe 40 at the small-diameter portion 45 of the tubular body, it is separated into two rectangular electric pipes. One rectangular electric pipe has a female fitting portion 43 at one end and a cut tube small diameter portion 45 at the other end. The other rectangular electric pipe has a male fitting portion 41 at one end portion and a cut tube small diameter portion 45 at the other end portion.

  FIG.15 (b) is an expanded sectional view of the cutting part vicinity of Fig.15 (a). As described above, the rectangular electric conduit 40 has the groove 53 in the center between the protrusions 51 and the two protrusions 51 protruding in the outer peripheral direction at the approximate center in the tube axis direction of each small tube diameter portion 45. Is formed, and the rectangular conduit 40 is cut at the groove 53.

  Next, a method for connecting the cut rectangular electric pipe 40 and the pipe joint 1 will be described. As described above, the length of the rectangular electric pipe 40 cut at the approximate center of the small tube diameter portion 45 of the rectangular electric pipe 40 is adjusted, for example, and connected to the pipe joint 1.

  First, as shown in FIG. 16 (a), the rectangular electric conduit 40 is cut to a predetermined length, and the cut end portion (tubular small diameter portion 45) is opposed to the small diameter portion fixing portion 2 of the pipe joint 1. Deploy. Next, the tubular body small diameter portion 45 is inserted into the small diameter portion fixing portion 2 of the pipe joint 1 (in the direction of arrow P in the figure).

  FIG. 16B is a view showing a state in which the rectangular electric pipe 40 is inserted into the small diameter portion fixing portion 2. The opening diameter of the cylindrical portion 15 is formed to a size that can accommodate the large tube diameter portion 44. Furthermore, the length of the cylindrical portion 15 is formed so as to substantially match the entire length of the pair of large-diameter portions 44 sandwiching the small-diameter portion 45 of the rectangular electric pipe inserted into the cylindrical portion 15. The Further, the cylindrical portion 13 is formed to be larger than the diameter of the tubular small diameter portion 45 of the rectangular electric conduit 40 and smaller than the diameter of the tubular large diameter portion 44. Further, the length of the circular cross section of the cylindrical portion 13 is formed to be equal to or longer than the length of the tubular small diameter portion 45 of the rectangular conduit 40.

  By setting the length of the circular cross section of the cylindrical portion in this manner, the tubular small diameter portion 45 is not formed with the projection 51 or the groove 53, and is cut at an arbitrary position of the tubular small diameter portion 45. A conduit can also be connected.

  In this manner, the cylindrical portion 13 of the small-diameter portion fixing portion 2 is arranged with the cut portion of the tubular small-diameter portion 45 of the rectangular electric conduit 40 being inserted toward the back side in the tube axis direction. The tubular portion 15 of the small-diameter portion fixing portion 2 is disposed in the order of at least the tube large-diameter portion 44, the tube small-diameter portion 45, and the tube large-diameter portion 44 of the rectangular electric conduit 40. At the position of the notch portion 17, the small tube diameter portion 45 of the rectangular conduit 40 is disposed.

  Further, as described above, the water stop member 31 is disposed in the cylindrical portion 15 of the small-diameter portion fixing portion 2 on the back side of the notch portion 17 so as to surround the entire inner peripheral surface of the cylindrical portion 15. . Therefore, the inner surface of the small-diameter portion fixing portion 2 and the outer surface of the tubular large-diameter portion 44 of the rectangular conduit 40 are brought into close contact with each other through the water-stop member 31 to ensure water-stop.

  Next, the saddle type fixing member 5 is inserted into the notch portion 17 from above the small diameter portion fixing portion 2. FIG. 17A is a diagram illustrating a state before the saddle-shaped fixing member 5 is inserted, and FIG. 17B is a diagram illustrating a state after the saddle-shaped fixing member 5 is inserted. 18A is a sectional view taken along the line KK in FIG. 17A, and FIG. 18B is a sectional view taken along the line LL in FIG. 17B.

  As shown in FIGS. 17 (b) and 18 (b), the saddle type fixing member 5 is inserted into the cutout portion 17 from above, and the step portion 11 of the saddle type fixing member 5 is formed on the upper side of the cylindrical portion 15. Is placed. That is, the step part 11 formed on the upper part of the both foot parts 9 of the saddle type fixing member 5 is brought into contact with the upper part of the side surface of the notch part 17 so that the side surface of the top surface part 7 is a rectangular electric wire. The tube 40 is placed on the upper portion of the side surface of the tubular portion 15 so as to be in contact with the side surface of the large-diameter portion 44 of the tube body. In this state, the distal ends of both feet 9 of the saddle-shaped fixing member 5 are inserted into the openings 23 provided on both sides of the bottom portion 29 of the cylindrical portion 15 of the small-diameter portion fixing portion 2, and the saddle-shaped fixing member 5 has a small diameter. It is fixed to the part fixing part 2.

  At this time, the inner peripheral surface of the top surface portion 7 of the saddle-shaped fixing member 5 is shaped to match the circular tubular small diameter portion 45 or smaller than the tubular large diameter portion 44 and does not interfere with the tubular small diameter portion 45. Is formed. For this reason, the inner peripheral surface of the top surface portion 7 of the saddle-shaped fixing member 5 is in contact with at least a part of the upper portion of the circular cross section of the tubular small-diameter portion 45 of the rectangular electric conduit 40, or the tubular small-diameter portion 45 It is possible to contact so as to cover the small-diameter portion 45 of the tubular body with a substantially arc shape that matches.

  When the saddle-shaped fixing member 5 is placed on the upper part of the side surface of the notch 17, the inner peripheral surface of the top surface portion 7 of the saddle-shaped fixing member 5 has a large diameter of the tube body of the internal rectangular conduit 40. It may be smaller than the portion 44 and larger than the small tube diameter portion 45 of the rectangular electric conduit 40. In this case, the saddle-shaped fixing member 5 is separated by a predetermined distance so as not to interfere with the tube small-diameter portion 45 of the rectangular conduit 40 and surrounds the upper part of the circular cross section of the tube small-diameter portion 45 of the square conduit 40. It becomes a shape to cover. That is, the saddle-shaped fixing member 5 inserted into the notch 17 may or may not come into contact with the small tube diameter portion 45 of the rectangular conduit 40.

  When the saddle-type fixing member 5 is pushed in until the step portion 11 comes into contact with the edge of the notch portion 17, the engaging portion 27 of the saddle-type fixing member 5 engages with the engaging step portion 25. For this reason, the saddle type fixing member 5 is fixed to the small diameter part fixing part 2, and the saddle type fixing member 5 does not fall out of the small diameter part fixing part 2. In addition, as described above, in this state, the tips of both feet 9 of the saddle-type fixing member 5 do not protrude to the outer surface of the bottom 29 of the small-diameter portion fixing unit 2. For this reason, it can suppress that both the leg parts 9 contact with an external other member.

  In this state, when the vertical fixing member 5 is fixed to the small-diameter portion fixing portion 2, when the rectangular electric pipe 40 is to be pulled out from the pipe joint 1, the upper portion of the inner surface of the top surface portion 7 of the vertical fixing member 5 is reduced. And the both foot portions 9 abut on and engage with the side surface of the substantially square tubular body large-diameter portion 44 of the square conduit 40. Thus, since the square electric pipe 40 and the pipe joint 1 are engaged in the pipe axis direction, the square electric pipe 40 does not come out of the pipe joint 1.

  As described above, the small tube diameter portion 45 of the rectangular conduit 40 cut by the small tube diameter portion 45 and the female fitting portion 43 of the rectangular conduit 40 can be connected. That is, a rectangular shape in which the tube small diameter portion 45 on the side cut by the tube small diameter portion 45 of the square electric conduit 40 and the female fitting portion 43 of the square electric conduit 40 are connected by the pipe joint 1. A connection structure 10a between the conduit 40 and the pipe joint 1 can be obtained.

  As described above, according to the present embodiment, at one end of the pipe joint 1, the pipe large-diameter part 44 as a plurality of substantially rectangular peaks on the outer peripheral surface of the pipe body 49, and the circular valley part The rectangular electric pipe 40 cut | disconnected by the small tube diameter part 45 of the square electric pipe 40 in which the small tube diameter part 45 as follows is formed can be connected. Further, the male joint portion 4 at the other end of the pipe joint 1 is formed on the inner peripheral portion of the tube body 49, and gradually from the female side tubular portion 35 and the female side tubular portion 35 from the distal end side. It is possible to connect a female fitting portion 43 having a female slope portion 37 that is reduced in diameter and a ring fitting portion 39 that is expanded from the minimum inner diameter portion of the female slope portion 37.

  At this time, the rectangular electric conduit 40 cut by the small tube diameter portion 45 is fixed to one end of the pipe joint 1 by fitting the saddle-shaped fixing member 5 and the joint main body 3 so that the female fitting is fitted. The joint portion 43 is fixed to the male joint portion 4 by fitting the ring fitting portion 39 and the ring member 6 together. For this reason, the cutting part in the tubular body small diameter part 45 of the rectangular conduit 40 and the female fitting part 43 can be easily connected. At this time, the connection work is completed with a single touch without using bolts or nuts, so the connection work is easy.

  Further, at the connection portion of the rectangular conduit 40 with the tube small diameter portion 45, the step portion 11 is formed at the lower portion of the top surface portion 7 of the saddle-shaped fixing member 5, and the step portion 11 is brought into contact with the upper portion of the notch portion 17 Therefore, the insertion allowance of the saddle type fixing member 5 can be easily grasped. For this reason, the saddle-shaped fixing member 5 is not excessively inserted into the small-diameter portion fixing portion 2 and the square electric conduit 40 is not pressed. Moreover, since the step part 11 is formed in both the leg parts 9 and the cross section of both the leg parts 9 is reinforced, the saddle type fixing member 5 is stable and does not buckle in the axial direction.

  Moreover, since the front-end | tip of both the leg parts 9 of the saddle type fixing member 5 does not protrude from the small diameter part fixing | fixed part 2 to an outer surface, it is suppressed that both the leg parts 9 contact with an external other member. For this reason, it can suppress that both the leg parts 9 are pushed in into the small diameter part fixing | fixed part 2, and the saddle type fixing member 5 falls out or is damaged. Therefore, even when the pipe joint 1 is collided with another member, the rectangular electric pipe 40 is not detached from the small diameter portion fixing portion 2.

  Further, the saddle-shaped fixing member 5 and the small diameter portion fixing portion 2 can be reliably fixed by engaging the engaging step portion 25 and the engaging portion 27. For this reason, the saddle type fixing member 5 does not come out of the small diameter portion fixing portion 2.

  In addition, by disposing the water stop member 31 on the back side (cylindrical portion 13 side) of the tubular portion 15, the outer peripheral surface of the tubular large-diameter portion 44 of the connected rectangular conduit 40 and the tubular portion 15. Between, the water-stopping property can be ensured. For this reason, it is possible to prevent water from entering the cylindrical portion 13.

  In addition, when the side surface of the tubular large-diameter portion 44 disposed on the back side of the tubular portion 15 is in contact with the side surface of the saddle-shaped fixing member 5, the rectangular electric pipe 40 is removed from the small-diameter portion fixing portion 2. There is no. At this time, since both feet 9 are inserted into the opening 23, deformation of both feet 9 is suppressed even when a tensile force is applied to the square conduit 40.

  Moreover, since the ring member 6 is arrange | positioned in the outer surface of the male coupling | joint part 4 in the connection part with the female type fitting part 43 of the square-shaped conduit 40, the ring member 6 can be visually recognized easily.

  Further, when the male joint portion 4 is inserted into the female fitting portion 43, the diameter of the ring member 6 is increased due to the elastic repulsive force, and the claw portion 24 has a section in the tube axis direction. The ring member 6 can be efficiently deformed by the effect of both of the diameter expansion due to the recovery of the bending deformation. For this reason, even if the thickness of the claw part 24 of the ring member 6 to which the pulling force is applied is increased, the diameter of the ring member 6 can be easily reduced. As a result, the male joint portion 4 and the female fitting portion 43 can be easily connected, and the male joint portion 4 can be reliably prevented from coming off from the connected state.

  Further, since the ring member 6 is slidable within the ring member arrangement portion 12, when the male joint portion 4 is pushed into the female fitting portion 43, the vicinity of the end portion of the ring member 6 is a large diameter portion. 14 and the slope portion 16 can be positioned in the vicinity of the boundary portion. For this reason, at the time of connection, the ring member 6 can be easily deformed with the vicinity of the boundary between the large diameter portion 14 and the slope portion 16 and the vicinity of the contact portion between the ring member 6 as fulcrums. Further, when a force is applied in a direction in which the male joint portion 4 is pulled out, the ring member 6 moves and is positioned on the outer peripheral portion of the large-diameter portion 14 of the ring member 6. For this reason, the diameter reduction of the ring member 6 can be suppressed.

  In particular, since the ring member 6 has an acute wedge shape in which the thickness is reduced from the tip of the claw portion 24 toward the reduced diameter portion 22, when the diameter of the ring member 6 is reduced, the slope in the ring member arrangement portion 12 The ring member 6 can be easily deformed with the contact portion with the portion 16 as a fulcrum.

  Further, if the ring member 6a is used, the ring member 6a is formed with the slide guide 61 and the ring member connecting portion 63, so that the ring member 6a can be stably slid and moved without tilting the ring member 6a. can do. Moreover, the opening diameter of the reduced diameter part of a ring member can be adjusted by adjusting the fitting position of the tooth | gear formed in the opposing surface of each ring member connection part 63. FIG. Therefore, even when the large-diameter rectangular electric conduit 40 having a large dimensional variation during molding is connected to the pipe joint 1, the ring member 6a can be stably slid.

  Further, the male joint portion 4 is inserted into the female fitting portion 43 by forming the inner thickness of the outer edge portion of the claw surface thinner than the thickness of the outer edge portion of the claw surface of the claw portion 24. The insertion resistance at the time can be reduced. Further, even when a pulling force is applied to the male joint portion 4 of the rectangular conduit 40, the claw portion 24 buckles because the outer peripheral portion of the claw portion 24 is formed thicker than the inside thereof. There is no.

  Further, since the water stop member 32 is arranged on the base side with respect to the ring member 6, when the male joint portion 4 is inserted into the female fitting portion 43, it is difficult to receive insertion resistance due to the water stop member 32. Can do. Even if a lubricant is applied to the water stop member 32, the lubricant does not adhere to the ring member 6.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1 ......... Pipe joint 2 ......... Small diameter part fixing | fixed part 3 ......... Joint main body 4 ......... Male type | mold joint part 5 ......... Vertical type fixing member 6, 6a ......... Ring member 7 ......... Top surface part 8 ......... Locking wall 9 ......... Both feet 10, 10a ......... Connection structure 11 ......... Step part 12 ......... Ring member arrangement part 13 ......... Cylindrical part 14 ......... Large diameter part 15 ... …… Cylindrical part 16 …… Slope part 17 ...... Notch part 18 ...... Small-diameter part 19 ...... Side surface 21 …… Top face 22 …… Reduced-diameter part 23 ...... Opening part 24 ...... Claw part 25 ...... Engagement step part 26 ...... Water stop member accommodating part 27 ...... Engagement part 28 ... Clearance 29 ......... Bottom parts 31 and 32 ... Water stop member 33 ... ... Taper part 34 .... Connection wall 35 ......... Female side tubular part 36 ......... Cut part 37 ......... Female side slope part 38 ......... Slit 39 ......... Ring fitting part 40 ......... Angle Type conduit 41 ... ... male fitting part 43 ... ... female fitting part 44 ... ... pipe large diameter part 45 ... ... pipe small diameter part 47 ... ... ring member 48 ... ... water stop member 49 ... ... pipe Body 51... Projection 53... Groove 55... Blade 61... Slide guide 63.

Claims (14)

There are a male fitting portion and a female fitting portion at the end of the tubular body, and a plurality of substantially rectangular shapes are formed on the outer peripheral surface of the tubular body between the male fitting portion and the female fitting portion. The tube of the rectangular electric wire tube cut at the tube small diameter portion of the rectangular electric wire tube in which the tube large diameter portion as the peak portion and the tube small diameter portion as the circular valley portion are alternately formed. A pipe joint that connects the small-diameter part and the female fitting part of the rectangular electric pipe,
The pipe joint is formed by a joint body and a hook-shaped fixing member,
The saddle-type fixing member has a top surface portion and both foot portions projecting downwardly connected so as to be substantially orthogonal to the top surface portion, and the bottom surface of the top surface portion includes the both foot portions and the top surface portion. A stepped portion is formed from the connecting portion to protrude outward,
A small-diameter portion fixing portion for fixing the small-diameter portion of the tubular body is formed on one side of the joint body, and the small-diameter portion fixing portion is provided on both sides of the small-diameter portion of the tubular body with the small-diameter portion of the tubular body interposed therebetween. A tubular portion into which the large-diameter portion of the tubular body to be disposed is inserted, and a cylindrical portion disposed on the back side of the tubular portion;
A part of the cylindrical part is formed with a notch that opens above the side surface of the substantially rectangular part and the top surface,
When the Π fixation member is to be inserted from above into the notch parts, the upper side surface of the tubular portion, the stepped portion of the Π-type fixing member is mounted, said legs of said Π fixation member parts in the Rukoto is inserted in an opening provided on both sides of the bottom portion of the tubular portion of the joint body, wherein the Π fixation member is fixed to the fitting body,
A male joint part is formed on the other side of the joint body as a fixing part of the female fitting part, and the joint body is between the small diameter part fixing part and the male joint part of the joint body. A connecting wall perpendicular to the tube axis direction is formed,
The small diameter portion fixing portion and the male coupling portion and the squareness conduit pipe fittings, characterized in Tei Rukoto connected by the connecting wall. The male joint portion includes a pair of locking walls that are spaced apart in the tube axis direction,
A ring member disposed in a region sandwiched between the locking walls,
The ring member is substantially C-shaped in which a part in the circumferential direction is cut,
The ring member has a reduced diameter portion on one end side of the ring member, and the reduced diameter portion,
A plurality of claw portions that are spaced apart from each other via slits in the circumferential direction, and the claw portions expand so that the outer diameter gradually increases from the reduced diameter portion toward the tip. Diameter,
The ring member is disposed such that a tip of the claw portion is located on the back side of the tubular body, and the reduced diameter portion is located on a distal end side of the tubular body,
A large-diameter portion of the male joint portion is formed on the distal end side of the tube body in the region sandwiched between the locking walls, and on the base side of the tube body in the region sandwiched between the locking walls. A small-diameter portion of the male joint portion is formed, and a slope portion is formed between the large-diameter portion of the male joint portion and the small-diameter portion of the male joint portion,
The ring member has a clearance between at least one of the locking walls, and is slidable in the tube axis direction in a region where the ring member is sandwiched between the locking walls. Item 2. A fitting for a rectangular electric conduit according to Item 1.   An engagement step portion is formed on the side of the tubular portion on the small diameter portion fixing portion side of the joint main body at a position corresponding to the notch portion, and the step portion of the saddle type fixing member An engagement portion is formed at a predetermined position below the outside of the both foot portions, and the engagement step portion and the engagement portion engage with each other in the vertical direction. 2. A pipe joint for a rectangular conduit according to 2.   The both feet do not protrude from the outer surface of the bottom when the both feet of the hook-shaped fixing member are inserted into the opening of the small diameter fixing portion of the joint body. The pipe joint for square electric pipes according to claim 3.   5. The pipe joint for a rectangular conduit according to claim 2, wherein an inner peripheral surface of the top surface portion of the saddle-shaped fixing member has a substantially arc shape or an arch shape.   In the small diameter portion fixing portion of the joint body on the back side from the notch portion, a water stop member is disposed so as to surround the entire inner peripheral surface of the tubular portion, or the male joint portion The square electric pipe pipe joint according to any one of claims 2 to 5, wherein a water-stopping member is disposed further on the back side than the locking wall.   The square water tube pipe joint according to claim 6, wherein the water-stop member is a water-expandable nonwoven fabric containing polyester fiber, sodium polyacrylate fiber, and a binder resin, or a rubber packing.   The joint body and the saddle-shaped fixing member are each made of high-density polyethylene, polypropylene, ABS resin, PC resin, ABS resin, or a polymer alloy of PC resin, respectively. The pipe joint for square type electric pipes in any one.   The length of the ring member in the tube axis direction is shorter than the sum of the lengths of the large-diameter portion of the male joint portion, the slope portion, and the small-diameter portion of the male joint portion, and the male joint portion. The square shape according to any one of claims 2 to 8, wherein the square shape is longer than any of a sum of lengths of the small diameter portion and the slope portion and a length of the large diameter portion of the male joint portion. Pipe fittings for conduits. The pipe large-diameter portion as a plurality of substantially rectangular ridges on the outer peripheral surface of the tubular body at one end of the pipe joint for a rectangular conduit according to any one of claims 2 to 9. A rectangular electric pipe formed by alternately forming the tubular small-diameter portions as circular valleys, and connecting the rectangular electric pipes cut at the small-diameter tubular portions;
Formed on the inner peripheral part of the tubular body at the male joint part at the other end of the rectangular pipe joint, and gradually from the female cylindrical part and the female cylindrical part from the tip side A square conduit characterized by connecting the female fitting portion comprising: a female slope portion having a reduced diameter; and a ring fitting portion having a diameter increased from a minimum inner diameter portion of the female slope portion; Connection structure for pipe joints for rectangular conduits.   Fixing the rectangular electric wire pipe cut at the small diameter portion of the tubular body to one end of the pipe joint is performed by fitting the saddle-shaped fixing member and the joint body, and the female fitting section 11. The rectangular electric pipe and the pipe fitting for a rectangular electric pipe according to claim 10, wherein the fixing of the pipe joint to the male joint portion is performed by fitting the ring fitting portion and the ring member. Connection structure.   The ring member has a taper portion that decreases in diameter from the tip of the claw portion toward the reduced diameter portion in a cross section in the tube axis direction, and the wall thickness decreases from the tip of the claw portion toward the reduced diameter portion. The connection structure of a rectangular electric pipe and a pipe joint for a rectangular electric pipe according to claim 10 or 11, which has a wedge shape.   A slide guide that protrudes in parallel with the pipe axis direction from the reduced diameter portion along the outer periphery of the large diameter portion of the male joint portion is provided in a portion of the ring member where the claw portion is not provided. The ring member connection part which is formed or is formed in the both ends of the circumferential direction of the said ring member, and the both ends are mutually overlap | superposed and connected is formed. Connection structure of a square conduit and a joint for a rectangular conduit.   14. The rectangular electric wire according to claim 12, wherein an inner thickness of the outer edge portion is formed thinner than a thickness of an outer edge portion of the nail surface of the claw portion of the ring member. Connection structure for pipes and pipe joints for rectangular conduits.

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