JP2007146925A - Pipe coupling tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe coupling tool capable of easily determining the connection posture with respect to a first pipe, and capable of maintaining and fixing the connection posture without accidentally moving upon attachment of a second pipe in the pipe connection tool used for adjacently piping the second pipe to the first pipe which is an annular recessed and projecting wavy pipe wherein a large part having a rectangular cross section and a small part having a circular cross section are alternately arranged along a pipe axial direction. <P>SOLUTION: This pipe coupling tool for adjacently piping the second pipe P2 to the first pipe P1 wherein the large parts 51 having a rectangular cross section and the small parts 52 having a circular cross section are alternately arranged along the pipe axial direction is provided with connection parts 2 and 3 to the small part 52 of the first pipe P1 and the second pipe P2 on both sides opposed through an intermediate part 1, and the intermediate part 1 is provided with an abutting part 4 projecting to the width direction of the connection parts 2 and 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pipe connector used to pipe adjacent pipes when multiple pipes are laid, and more specifically, a large section having a square cross-sectional area and a small section having a circular cross-sectional area are pipes. The present invention relates to a pipe connector used to pipe another pipe close to an annular corrugated pipe arranged alternately in the axial direction.

  The pipe used for this multi-strand laying is not limited to a specific shape, but for example, a large section with a square cross-sectional area and a small section with a circular cross-sectional area are alternately arranged in the pipe axis direction. The annular corrugated pipe is installed in a compact state with good stability and few gaps by bringing the flat walls of the circumferential surface of the large part into contact with each other and making adjacent pipes in the vertical and horizontal directions. Therefore, it has been frequently used conventionally.

  And when laying such pipes in multiple lines, in order to prevent the pipes from being displaced from each other when the pipes are close to each other in the vertical direction or the side-by-side direction, the pipe posture is not disturbed. A pipe connector that prevents relative movement between adjacent pipes is used so that the laying state can be maintained.

  This pipe connector is not limited to a specific form, and various forms are conceivable. For example, in Japanese Patent Application Laid-Open No. 7-301216, a C-shaped holding member that detachably holds members such as electric wires is provided. The two combined clips having the same shape, each having a C-shaped holding part, with the C-shaped holding parts facing each other, and press-fitting members from the openings of the respective C-shaped holding parts The structure which can hold a member at a fixed interval by holding it is disclosed, and by applying the member as a pipe, it is applied to fix the position of adjacent pipes when laying multiple pipes. Is possible.

Japanese Utility Model Publication No. 3-52486 discloses a clip in which two gripping portions formed of a C-shaped elastic member for gripping cables and pipes are connected by a connecting portion. In addition, by pushing and holding the tube from the opening of the C-shaped gripping portion, it is possible to apply to fixing the positions of adjacent tubes when laying multiple tubes.
JP-A-7-301216 Japanese Utility Model Publication No. 3-52486

  However, all of these pipe couplers have a configuration in which the holding portion (gripping portion) is formed in a C shape and the circumferential surface having a circular cross section of the pipe (member) is elastically sandwiched and held. Is. Therefore, when these pipe couplers are applied to, for example, the annular concave and convex corrugated pipe and the holding part of the pipe coupler is fitted and held in the small part of the annular concave and convex corrugated pipe, in the pipe axis direction, The movement is restricted by the front and rear large parts adjacent to the small part, but in the circumferential direction of the tube, the rotation is restricted by the elastic pinching of the holding part to the circumferential surface of the pipe. It depends only on the applied force, and the positioning is not performed reliably.

  Therefore, in the state in which one holding part of the pipe connector is simply fitted to the first pipe, the direction of the other holding part varies, and the second pipe is appropriately connected to the first pipe. To close the pipe in the position and direction, after fitting one holding part of the pipe connector into the first pipe, before fitting the second pipe into the other holding part, It is necessary to rotate the attached pipe coupler in the circumferential direction of the first pipe and adjust the orientation of the other holding part.If the pipe length is long, or many pipes are arranged in the vertical and horizontal directions. When laying, a large number of pipe couplers must be attached to the first pipe, and the second pipe must be fitted while adjusting the orientation of each holding part, which requires extra time and labor. It was.

  Further, after fitting one holding part of the pipe connector into the first pipe and then fitting the second pipe into the other holding part, a certain pressing force is applied to the second pipe to It is necessary to fit the second pipe while expanding the opening of the holding part, and this causes the weight of the second pipe and the pressing force applied to the second pipe to be combined with the pipe connector. As a result, there is a risk that the pipe connector rotates and tilts in the left-right circumferential direction of the first pipe, and the operation of fitting the second pipe into the other holding portion is extremely difficult.

  In view of this, the present invention provides an annular undulating corrugated pipe in which a large section having a square cross-sectional area and a small section having a circular cross-sectional area are alternately arranged in the tube axis direction as a first pipe. For the pipe connector used when pipes are close to each other, the connection posture with respect to the first pipe can be easily determined, and the connection posture can be obtained without spilling when the second pipe is attached. It is intended to provide a pipe connector capable of maintaining and fixing.

  The configuration of the present invention taken to solve this problem will be described with reference to the reference numerals used in the drawings showing the embodiments. The first embodiment of the present invention is a large section 51, 51 having a square sectional area. A pipe connector for connecting the second pipe P2 to the first pipe P1 in which the small sections 52, 52,... Having a circular cross-sectional area are alternately arranged in the pipe axis direction, There are connecting portions 2 and 3 to the small portion 52 of the first tube P1 and the second tube P2 on both sides facing each other through the intermediate portion 1, and the intermediate portion 1 protrudes in the width direction of the connecting portions 2 and 3 It is set as the structure provided with the contact part 4 to perform.

  Further, according to the second embodiment of the present invention, the large-sized portions 51, 51... Having a square cross-sectional area and the small-shaped portions 52, 52... Having a circular cross-sectional area are alternately arranged in the tube axis direction. In order to pipe the second pipe P2 close to the pipe P1, the pipe connector is composed of the first connector A and the second connector B, and the first connector A is one end of the intermediate portion 1a. A connecting portion 2 with the small portion 52 of the first tube P1 is formed on the side, and the connecting portion 3 with the second tube P2 is formed on one end side of the intermediate portion 1b of the second connector B, The other end side of the intermediate portion 1a, the other end side of the intermediate portion 1b, or both include a contact portion 4 protruding in the width direction of the connecting portions 2 and 3, and the other end side of the intermediate portion 1a and the intermediate portion In this configuration, the coupling portions 5 and 6 are coupled to the other end of the portion 1b.

  According to the first aspect of the present invention, the small portion of the first tube and the connecting portion with the second tube are provided on both sides facing each other through the intermediate portion, and the intermediate portion protrudes in the width direction of the connecting portion. When the connecting portion is connected to the small portion of the first pipe, the abutting portion is placed on the flat wall of the outer peripheral surface of the large portion adjacent to the small portion. Since the abutment prevents the tube connector from rotating in the circumferential direction of the first tube, the connection posture of the tube connector with respect to the first tube is reliably determined using the abutment portion as a guide. After the pipe connector is attached to the small portion of the first tube, the complicated operation of rotating the pipe connector in the circumferential direction of the first tube and adjusting the direction of the pipe connector may be omitted. it can. In addition, after attaching the tube connector to the small portion of the first tube, when the second tube is fitted into the connector and held there, the tube connector rotates and tilts in the circumferential direction of the tube. Therefore, the second pipe can be easily and quickly fitted into the pipe connector, and the pipe position of the second pipe with respect to the first pipe is also surely set. Can be determined on the street. Thus, while it is possible to easily and accurately pipe adjacent pipes, it is possible to significantly shorten the work time for pipes to be adjacently piped and to reduce work costs.

  Moreover, according to the 2nd form of this invention, since it was set as the structure which consists of a combination of a 1st connection tool and a 2nd connection tool, many kinds of pipe connection tools by the combination of a 1st connection tool and a 2nd connection tool. Therefore, it is possible to quickly cope with many types of adjacent piping patterns such as pipes of different types, sizes, and diameters. In addition, even in the production stage, when many types of adjacent piping patterns are required, one type of pipe connector is not produced for one adjacent piping pattern, but there are fewer types considering the combination. Since the production of the first connector and the second connector is sufficient, the production type of the tube connector can be greatly reduced, and the production cost can be reduced.

  Further, similarly to the effect obtained from the first embodiment, the coupling portion of the first coupling tool and the second coupling tool is coupled to integrate the first coupling tool and the second coupling tool, so that the coupling portion is When connected to the small portion of one pipe, the abutting portion comes into contact with the flat wall of the outer peripheral surface of the large portion adjacent to the small portion, and the pipe connector rotates in the circumferential direction of the first tube. Since it is a configuration that prevents movement, the connection posture of the tube connector to the first tube is definitely determined using the contact portion as a guide, and the tube connector is attached to the small portion of the first tube. Later, the complicated operation of rotating the tube connector in the circumferential direction of the first tube and adjusting the direction of the tube connector can be omitted. In addition, after attaching the tube connector to the small portion of the first tube, when the second tube is fitted into the connector and held there, the tube connector rotates and tilts in the circumferential direction of the tube. Therefore, the second pipe can be easily and quickly fitted into the pipe connector, and the pipe position of the second pipe with respect to the first pipe is also surely set. Can be determined on the street. Thus, while it is possible to easily and accurately pipe adjacent pipes, it is possible to significantly shorten the work time for pipes to be adjacently piped and to reduce work costs.

  In carrying out the first embodiment of the present invention, the configuration of the abutting portion 4 is arbitrary and is not limited, but the pipe connector attached to the first pipe P1 is the first pipe P1. As a minimum configuration for preventing rotation in the circumferential direction, for example, when the contact portion 4 connects the small portion 52 of the first pipe P <b> 1 to the connecting portion 2, the small portion 52. On the outer peripheral surface of the flat wall of the large-sized portion 51 adjacent to the at least the portion that is in the shortest distance from the tube axis center, or when the small portion 52 of the first tube P1 is connected to the connecting portion 2 The outer peripheral surface of the flat wall of the large portion 51 adjacent to the small portion 52 only needs to satisfy at least the configuration in which it abuts on both sides of the portion at the shortest distance from the tube axis center.

  The contact portion 4 is configured to be sandwiched between the first tube P1 and the second tube P2 when the first tube P1 and the second tube P2 are connected to the connecting portions 2 and 3. Then, when the second pipe P2 is piled up on the first pipe P1 and the adjacent pipe is placed, the weight of the second pipe P2 piled up at the contact portion 4 is received and a stable piled pipe is formed. The contact portion 4 is in contact with the large portion 51 of the first tube P1 while receiving the weight of the second tube P2, so that the connecting portion 2 and the first tube P1 are small. The incidental effect that the connection state with the part 52 can also be maintained stably is also obtained.

  In carrying out the second embodiment of the present invention, the configuration of the abutting portion 4 is arbitrary and is not limited, but the pipe connector attached to the first pipe P1 is the first pipe P1. As a minimum configuration for preventing rotation in the circumferential direction, for example, when the contact portion 4 connects the small portion 52 of the first pipe P1 to the connection portion 2, the small portion When the outer peripheral surface of the flat wall of the large portion 51 adjacent to 52 is in contact with at least a portion that is the shortest distance from the tube axis center, or when the small portion 52 of the first tube P1 is connected to the connecting portion 2 In addition, the outer peripheral surface of the flat wall of the large portion 51 adjacent to the small portion 52 only needs to satisfy a configuration in which it abuts on both sides of a portion at the shortest distance from the tube axis center.

  The contact portion 4 is configured to be sandwiched between the first tube P1 and the second tube P2 when the first tube P1 and the second tube P2 are connected to the connecting portions 2 and 3. Then, when the second pipe P2 is piled up on the first pipe P1 and the adjacent pipe is placed, the weight of the second pipe P2 piled up at the contact portion 4 is received and a stable piled pipe is formed. The contact portion 4 is in contact with the large portion 51 of the first tube P1 while receiving the weight of the second tube P2, so that the connecting portion 2 and the first tube P1 are small. The incidental effect that the connection state with the part 52 can also be maintained stably is also obtained.

  Embodiments of the present invention will be described below together with illustrated examples. FIGS. 1 to 7 are views for explaining a pipe connector of the first embodiment of the present invention. FIG. 1 is a perspective view, and FIG. 2 is a perspective view in which the pipe connector is attached to the first pipe P1. 3 is a perspective view of the second pipe P2 attached to the pipe connector, FIG. 4 is a sectional view taken along the line CC of FIG. 2, FIG. 5 is a side view of FIG. 3, and FIG. 7 is a perspective view showing a state where pipes P, P...

  In the pipe connector of the first embodiment, square large portions 51 and 61 whose cross-sectional areas are arc-shaped corners and small small portions 52 and 62 whose cross-sectional areas are circular are alternately arranged in the tube axis direction. When the same-shaped pipes P, P,... Arranged in a row are stacked or arranged side by side, the adjacent first pipe P1 (hereinafter referred to as pipe P1) and the second pipe The pipe P2 (hereinafter referred to as pipe P2) is used to fix the position to each other. In the present embodiment, the material is molded using a polyethylene resin, but it may be a synthetic resin material such as polypropylene or polyester, or other materials.

  As shown in FIG. 1, the structure is formed in a substantially C shape with sandwiching pieces 21 and 22 for sandwiching and holding the small portion 52 of the pipe P <b> 1 on one end side of the prismatic intermediate portion 1. The connecting part 2 is provided, and the other end side is provided with a connecting part 3 formed in a substantially C shape with sandwiching pieces 31 and 32 for sandwiching and holding the small part 62 of the pipe P2 in the same plane. The C-shaped openings 23 and 33 are formed so as to face each other. The inner peripheral surfaces of the connecting portions 2 and 3 are holding surfaces 24 and 34 for connecting and holding the tubes P1 and P2, and are substantially the same as the outer peripheral surfaces of the small portions 52 and 62 of the tubes P1 and P2, or slightly. As the shape contracted inward, the small portions 52 and 62 of the pipes P1 and P2 are formed so as to be elastically sandwiched and held.

  At the intermediate position in the axial direction of the intermediate portion 1, a rectangular thin plate-like contact portion 4 is provided, and at its center of gravity, a pair of opposing sides 41 and 42 are connected to each other at right angles to the intermediate portion 1. It extends in the width direction of the parts 2 and 3 and is formed so as to be parallel to the tube axes of the tubes P1 and P2 that are connected and held. As shown in FIG. 5, the opposing sides 41 and 42 of the abutting portion 4 are connected to the connecting portions 2 and 3 and the small portions 52 and 62 of the tubes P1 and P2 are connected and held. The front and rear large portions 51 and 51 adjacent to the portion 52 and the front and rear large portions 61 and 61 adjacent to the small portion 62 of the pipe P2 are formed to have a length. Another pair of facing sides 43 and 44 orthogonal to the facing sides 41 and 42 is formed with a shorter length than one side of the large-sized portion 51 and the large-shaped portion 61 having a square shape in cross section as seen in FIG. Has been.

  Further, as shown in FIG. 5, when the small portion 52 of the pipe P <b> 1 is connected and held to the connecting portion 2, the contact portion 4 is the outer peripheral surface of the large portions 51, 51 in the front-rear direction adjacent to the small portion 52. When the small portion 62 of the pipe P2 is connected to and held by the connecting portion 3, the abutting portion 4 becomes the outer peripheral surface of the large portions 61, 61 in the front-rear direction adjacent to the small portion 62. So as to be sandwiched between the flat wall of the outer peripheral surface of the large portions 51 and 51 of the pipe P1 and the flat wall of the outer peripheral surface of the large portions 61 and 61 of the tube P2. The length of the intermediate portion 1 is set to an appropriate length in advance.

  Next, as shown in FIG. 2 and FIG. 3, the use state of the pipe connector having the above-described configuration when the pipe P2 is stacked on the upper part of the pipe P1 and adjacent pipes will be described. First, the connecting portion 2 is pushed through the opening 23 from above the small portion 52 of the placed pipe P1. Then, the sandwiching pieces 21 and 22 are elastically expanded outward, and when further pushed in, the sandwiching pieces 21 and 22 are contracted by a restoring force to sandwich and hold the small portion 52, so that the small portion 52 cannot be detached from the small portion 52 with some force. At the same time, as shown in FIG. 2, the abutting portion 4 abuts against the flat wall of the circumferential surface of the large and small portions 51, 51 adjacent to the small portion 52 of the pipe P <b> 1.

  At this time, from the state shown in FIG. 4, even if a force that rotates to the left side in the circumferential direction of the pipe P1 acts on the pipe connector, the left part from the center part of the contact part 4 Since this moves to a flat wall with a greater distance from the center of the tube axis, the movement is hindered, and conversely, a force that rotates to the right in the circumferential direction of the tube P1 acts on the tube connector. Even so, the portion on the right side from the center of the contact portion 4 moves to the flat wall whose distance is further increased from the center of the tube axis. Therefore, in the state shown in FIG. 4, the pipe connector is fixed in a state where the opening 33 of the connecting part 3 is directed upward without rotating in the circumferential direction of the pipe P1 and causing a positional shift.

  Further, when the small portion 62 of the other pipe P2 is pushed from the opening 33 of the connecting portion 3 and the small portion 62 of the pipe P2 is clamped and held by the same action, the pipe P1 as shown in FIG. The pipe P2 is piled up on the upper side of the tube and brought into a close state. As shown in FIG. 5, the abutting portion 4 also abuts on the circumferential surfaces of the large and small portions 61 and 61 adjacent to the small portion 62 of the tube P <b> 2, and the tube connector is another tube. A tube that is pivoted in the circumferential direction of P2 and fixed without causing displacement, and is sandwiched between the large portions 51, 51 of the tube P1 and the large portions 61, 61 of the tube P2, and stacked on top. The adjacent piping state can be stably maintained under the load of P2.

  When the pipes are close to each other in the horizontal direction, the same method can be used. As shown in FIG. 7, the pipes P, P... The single pipes P, P,... Can be connected to multiple adjacent pipes without causing a positional shift, and the piping posture can be maintained without causing a positional shift even after piping.

  FIG. 8 and FIG. 9 are views for explaining a pipe connector according to the second embodiment of the present invention, and show another example of the contact portion 4. The abutment portion 4 of the present embodiment is a tube that is formed so as to protrude straight in the shape of a prismatic bar from the intermediate position in the axial direction of the intermediate portion 1 toward both sides in the width direction of the connecting portions 2 and 3, and is connected and held. It is formed in a posture that is parallel to the pipe axes of P1 and P2. As in the first embodiment, the abutting portion 4 is located in the front and rear adjacent to the small portion 52 of the pipe P1 in a state where the small portions 52 and 62 of the tubes P1 and P2 are connected and held by the connecting portions 2 and 3. It is formed with a length straddling the large-sized portions 51, 51 in the direction and the large-sized portions 61, 61 in the front-rear direction adjacent to the small-sized portion 62 of the pipe P2.

  In use, as shown in FIG. 9, when the connecting portion 2 is connected to and held by the small portion 52 of the pipe P <b> 1, the abutting portion 4 becomes a large portion 51 in the front-rear direction adjacent to the small portion 52, Of the 51 flat walls, it abuts on the shortest distance from the center of the tube axis. From this state, even if a force that rotates in the circumferential direction of the pipe P1 acts on the pipe connector, the contact portion 4 is prevented from moving to a location where the distance from the center of the pipe axis on both the left and right sides increases. The pipe connector is fixed without causing a positional shift in the circumferential direction of the pipe P1. Other configurations and operations are the same as those in the first embodiment.

  10 and 11 are views for explaining a pipe connector according to the third embodiment of the present invention, and show another example of the configuration of the abutting portion 4. The abutting portion 4 of this embodiment is formed in an H-shaped thin plate shape, and is orthogonal to the intermediate portion 1 at the center of gravity of the H-shape at an intermediate position in the axial direction of the intermediate portion 1. A set of vertical sides 45 and 46 of the H-shape of the contact portion 4 extend in the width direction of the connecting portions 2 and 3 and are parallel to the tube axes of the tubes P1 and P2 to be connected and held. In the state where the small portion 52 of the pipe P1 is connected and held to the connecting portion 2 and the small portion 62 of the tube P2 is connected and held to the connecting portion 3, the small portion 52 of the tube P1 is adjacent to the small portion 52 of the pipe P1. The front and rear large portions 51 and 51 and the front and rear large portions 61 and 61 adjacent to the small portion 62 of the pipe P2 are formed to have a length.

  In use, as shown in FIG. 11, when the connecting portion 2 is connected and held to the small portion 52 of the pipe P <b> 1, the H-shaped vertical sides 45 and 46 of the contact portion 4 are adjacent to the small portion 52. Of the flat walls on the peripheral surfaces of the large and small portions 51, 51 in the front-rear direction, the two abutting on the left and right are centered on the portion at the shortest distance from the tube axis center. From this state, even if a force that rotates counterclockwise toward the pipe P1 in the circumferential direction of the pipe P1 acts on the pipe connector, the vertical side 45 is located on the left side where the distance from the pipe axis center becomes larger. Therefore, the pipe connector is prevented from rotating counterclockwise in the circumferential direction, and conversely, the pipe connector has a force to rotate clockwise in the circumferential direction of the pipe P1. Even if it acts, since the vertical side 46 is prevented from moving to the right adjacent place where the distance from the tube axis center becomes larger, the tube connector is prevented from rotating clockwise in the circumferential direction, Therefore, the pipe connector is fixed without causing a positional shift in the circumferential direction of the pipe P1. Other configurations and operations are the same as those of the first embodiment.

  FIG. 12 is a view for explaining the pipe connector of the fourth embodiment of the present invention, and shows still another example of the configuration of the abutting portion 4. The difference from the first embodiment is that the contact portion 4 is adjacent to the small portion 52 of the pipe P1 in a state where the small portions 52 and 62 of the tubes P1 and P2 are connected and held by the connecting portions 2 and 3. Length in the tube axis direction so as to contact only one of the large-sized portions 51, 51 in the direction and one of the large-sized portions 61, 61 in the front-rear direction adjacent to the small-sized portion 62 of the pipe P2. It is a point that is formed with approximately half the thickness. Other configurations and operations are the same as those in the first embodiment.

  FIGS. 13 to 15 are views for explaining a pipe connector according to a fifth embodiment of the present invention, which is a joint-type pipe connector divided into a first connector A and a second connector B. FIG. . In the present embodiment, the large section 51 having a square cross-sectional area, the small section 52 having a regular circular cross section, and the large section 61 having a square cross section are separated from the pipe P1 having a square cross section. About a joint-type pipe connector in which the small circular parts 62 having a regular circular area are arranged in the pipe axis direction at the same pitch as the pipe P1, and the pipe P2 smaller than the pipe P1 is fixed by close piping. This will be described below.

  As shown in FIG. 13, the 1st connection tool A has formed the connection part 2 formed in the substantially C shape by the clamping pieces 21 and 22 at the one end side of the intermediate part 1a of prismatic bar shape. The inner peripheral surface side of the connecting portion 2 is a holding surface 24 for connecting and holding the tube P1, and is formed to be substantially the same shape as the outer peripheral surface of the small portion 52 of the tube P1 or slightly contracted to the inside. And the small portion 52 is formed so as to be elastically clamped and held.

  On the other end side of the intermediate portion 1a, a rectangular thin plate-like contact portion 4a is directly connected at the center of gravity, and one set of opposing sides 47a and 48a out of the four sides of the square are connected to the connecting portion 2. In a state where the pipe P1 extends in the width direction and is parallel to the pipe axis of the pipe P1 to be connected and held, and the small part 52 of the pipe P1 is connected to and held by the connecting part 2, the pipe P1 It is formed with a length straddling the two large portions 51, 51, 51, 51 respectively in the front-rear direction adjacent to the small portion 52. Further, as connecting portions 5 and 6 with the abutting portion 4b described later, a connecting projection 5 having a tapered tip with a large diameter is provided in the middle portion near the opposing side 47a from the center of gravity of the abutting portion 4a. A circular connecting hole 6 penetrating the contact portion 4a is formed near the opposite side 48a from the center of gravity of the contact portion 4a. ing.

  Similarly to the first connector A, the second connector B also has a connecting portion 3 formed in a substantially C-shape with sandwiching pieces 31 and 32 at one end of a prismatic intermediate portion 1b. Since the connecting portion 3 sandwiches and holds the small portion 62 of the pipe P2 having a smaller diameter than the small portion 52 of the pipe P1, the connecting portion 3 is naturally smaller than the connecting portion 2, and the holding surface 34 of the pipe P2 It is formed to be substantially the same shape as the outer peripheral surface or slightly shrunk inward.

  The other end of the intermediate portion 1b is a rectangular thin plate having the same shape as the contact portion 4a, and a contact portion 4b coupled to the contact portion 4a is directly connected and formed at the center of gravity. A pair of opposing sides 47b and 48b out of the four sides are formed in a posture extending in the width direction of the connecting portion 3 and parallel to the tube axis of the tube P2 to be connected and held. In a state where the small portion 62 of the tube P2 is connected and held, the tube P2 is formed in such a length as to abut on the two large portions 61, 61, 61, 61 adjacent to the small portion 62 of the tube P2. The contact portion 4b is formed with a connection projection 5 and a connection hole 6 having the same shape as the contact portion 4a. When the contact portion 4b is opposed to the contact portion 4a, the contact portion 4b is connected to the connection projection 5 of the contact portion 4a. A connecting hole 6 into which the connecting protrusion 5 is fitted is formed at an opposing position, and the connecting protrusion 5 to be fitted into the connecting hole 6 at a position facing the connecting hole 6 of the contact portion 4a. Is formed.

  In use, the abutting portion 4a and the abutting portion 4b are opposed to each other, and the respective coupling protrusions 5 are pressed and fitted into the coupling holes 6 at the opposed positions until the tapered tip portion penetrates. As shown in FIG. 14, the contact portion 4a and the contact portion 4b are combined to form a two-layer flat plate, and the first connector A and the second connector B are integrated. The subsequent steps are substantially the same as in the first embodiment, but when the connecting portion 2 is connected and held to the small portion 52 of the pipe P1, the combined and abutting portion 4 becomes the small portion 52 of the pipe P1. And the two large portions 51, 51, 51, 51 adjacent to each other in the front-rear direction, and the pipe connector is prevented from rotating in the circumferential direction and is fixed. Next, by fitting the small portion 62 of the tube P2 into the connection portion 3 of the second connector B and connecting and holding the tube P2, the combined contact portion 4 becomes the small portion of the tube P2. 62 also contacts the circumferential surfaces of the two large portions 61, 61, 61, 61 respectively in the front-rear direction adjacent to 62, and the pipe connector rotates in the circumferential direction of the other pipe P2 to cause a positional deviation. The pipes that are fixed without being sandwiched between the four large parts 51, 51, 51, 51 of the pipe P1 and the four large parts 61, 61, 61, 61 of the pipe P2 and stacked on the upper part The adjacent piping state can be stably maintained under the load of P2.

  At this time, as shown in FIG. 15, the tapered tip portion of the connecting projection 5 protruding from the contact portion 4b is between the large portions 61 and 61 of the pipe P2, and the connecting portion 3 is connected and held. The tapered tip portion of the connecting projection 5 that fits in the space where the small portion 62 of the pipe P2 is formed and protrudes from the contact portion 4a is between the large portions 51 and 51 of the pipe P1, and is connected to the connecting portion 2. Fits within the space where the small portion 52 of the pipe P1 to be connected and held is formed, the tapered tips of the two connecting projections 5 are connected to the large portion 51 of the pipe P1 to be connected and the large size of the pipe P2. The adjacent piping state of the pipes P1 and P2 is not disturbed by colliding with the part 61.

  FIGS. 16 to 18 are views for explaining a pipe connector according to a sixth embodiment of the present invention, which shows another configuration example of the contact portion 4 and the coupling portions 5 and 6 of the fifth embodiment. It is. In this embodiment, as shown in FIG. 16, the contact portion 4 is formed only at the other end of the intermediate portion 1a of the first connector A, and at the other end of the intermediate portion 1b of the second connector B. The two connecting projections 5 and 5 are formed so that the front end portion protrudes in a substantially U-shape, and two connecting projections 5 and 5 are fitted in the center of the contact portion 4. Connection holes 6 and 6 are formed. In use, the connecting protrusions 5 and 5 are fitted into the connecting holes 6 and 6 and integrated as shown in FIGS. 17 and 18. The other points are the same as in the fifth embodiment.

  By changing the combination of the first connector A and the second connector B, the pipe P1 in which the large-sized portion 51 having a square cross-sectional area and the small-sized portion 52 having a circular cross-sectional area are arranged in the tube axis direction. The pipe P2 that is adjacent to the pipe is not limited to the same type of pipe as the pipe P1, but is a pipe in which a large-sized part 61 having a square cross-sectional area and a small-sized part 62 having a square cross-sectional area are arranged in the pipe axis direction, or a cross-sectional area. A tube having a large circular portion 61 and a small small portion 62 having a circular cross-sectional area arranged in the tube axis direction, a circular smooth tube, and the like, or tubes of various types or sizes and diameters. Can be connected and fixed in position. Further, the contact portion 4 and the connecting portions 5 and 6 can take various forms and connecting means other than the fifth and sixth embodiments.

  Although the embodiment considered to be a representative example of the present invention has been described above, the present invention is not limited to the above-described embodiment. For example, the connection part 2 and the connection part 3 have the same shape regardless of whether it is a single-piece pipe connector that is the first form of the present invention or a joint-type pipe connector that is the second form. May be irregular. In addition, the present invention has the above-described constituent requirements, can achieve the object of the present invention, and can be implemented with appropriate modifications within the scope of the effects of the present invention.

  The present invention is positioned by placing various other types of pipes in close proximity to a pipe in which a large section having a square cross-sectional area and a small section having a circular cross-sectional area are alternately arranged in the pipe axis direction. It is used in the case of fixing, and it is expected that the working efficiency will be greatly improved compared with the conventional pipe connector.

The perspective view of 1st Example. The perspective view which attached the pipe connector to the pipe P1. The perspective view which attached the pipe P2 to the pipe connector. The CC sectional view taken on the line of FIG. The side view of the same FIG. The DD sectional view taken on the line of FIG. The perspective view which shows the state which piped the pipes P, P ... in proximity to multiple lines. The perspective view of 2nd Example. Sectional drawing of the state which attached the pipe connector to the pipe P1. The perspective view of 3rd Example. Sectional drawing of the state which attached the pipe connector to the pipe P1. The perspective view of 4th Example. The disassembled perspective view of 5th Example. The perspective view of the combined state. Sectional drawing of the state which attached the pipe connector to the pipe P1 and the pipe P2. The disassembled perspective view of 6th Example. The perspective view of the combined state. EE sectional view taken on the line of FIG.

Explanation of symbols

1, 1a, 1b Intermediate portion 2, 3 Connecting portion 4, 4a, 4b Abutting portion 5 Connecting portion (connecting protrusion)
6 joints (connection holes)
51 Large-diameter portion 52 Small-diameter portion A First connector B Second connector P tube P1 First tube P2 Second tube Q Tube connector

Claims (8)

  A first pipe (51), (51), which has a square cross-sectional area, and small parts (52), (52), which have a circular cross-sectional area, are alternately arranged in the pipe axis direction. P1) is a pipe connector for connecting the second pipe (P2) in close proximity to each other with the small section (52) and the first pipe (P1) on both sides facing each other through the intermediate section (1). It has connecting parts (2) and (3) with the second pipe (P2), and the intermediate part (1) has a contact part (4) protruding in the width direction of the connecting parts (2) and (3). Pipe coupler.   The contact portion (4) is a large portion (51) adjacent to the small portion (52) when the small portion (52) of the first pipe (P1) is connected to the connecting portion (2). 2. The pipe connector according to claim 1, wherein at least an outermost surface of the flat wall is in contact with at least a portion at a shortest distance from the center of the pipe axis.   The contact portion (4) is a large portion (51) adjacent to the small portion (52) when the small portion (52) of the first pipe (P1) is connected to the connecting portion (2). 2. The pipe connector according to claim 1, wherein, on the outer peripheral surface of the flat wall, the pipe connector contacts at least both sides of a portion that is at the shortest distance from the center of the pipe axis.   The contact portion (4) is connected to the first tube (P1) and the second tube (P2) when the first tube (P1) and the second tube (P2) are connected to the connecting portions (2) and (3). The pipe connector according to any one of claims 1 to 3, wherein the pipe coupler is sandwiched between two pipes (P2). A first pipe (51), (51), which has a square cross-sectional area, and small parts (52), (52), which have a circular cross-sectional area, are alternately arranged in the pipe axis direction. A pipe connector composed of a first connector (A) and a second connector (B) in order to connect the second tube (P2) close to P1),
The first connector (A) is formed with a connecting portion (2) with the small portion (52) of the first pipe (P1) on one end side of the intermediate portion (1a),
The second connector (B) is formed with a connection part (3) with the second pipe (P2) on one end side of the intermediate part (1b),
The other end side of the intermediate portion (1a), the other end side of the intermediate portion (1b), or both have contact portions (4) protruding in the width direction of the connecting portions (2), (3). Prepared,
A pipe connector comprising coupling portions (5) and (6) in which the other end side of the intermediate portion (1a) and the other end side of the intermediate portion (1b) are coupled to each other.   The contact portion (4) is a large portion (51) adjacent to the small portion (52) when the small portion (52) of the first pipe (P1) is connected to the connecting portion (2). The pipe connector according to claim 5, wherein at least an outermost surface of the flat wall abuts on a portion at a shortest distance from the center of the pipe axis.   The contact portion (4) is a large portion (51) adjacent to the small portion (52) when the small portion (52) of the first pipe (P1) is connected to the connecting portion (2). 6. The pipe connector according to claim 5, wherein, on the outer peripheral surface of the flat wall, the pipe connector is in contact with at least both sides of a portion at the shortest distance from the pipe axis center.   The contact portion (4) is connected to the first tube (P1) and the second tube (P2) when the first tube (P1) and the second tube (P2) are connected to the connecting portions (2) and (3). The pipe connector according to any one of claims 5 to 7, wherein the pipe coupler is sandwiched between two pipes (P2).

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