JP2018155260A - Joint for pipe structural material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for a pipe structural material in which the connection, immobilization or the operation of disconnecting the connection of the pipe is easy and convenient.SOLUTION: An insertion part inserted to an end opening of a pipe 1 combines the joint segments divided in two by the plane comprising an axis line. In each joint segment, a bearing cylinder is provided inwardly in the central part on the axis line of each insertion part or in the crossing part of each axis line. A though-hole for making this bearing cylinder open to the external is provided as a tool insertion hole. In each bearing cylinder of the joint segment, a central axis of a disc-shaped revolution body is supported rotatably. A pushing bar connected with the disc-shaped revolution body is arranged along an axis line of each insertion part, and a tapered part of each pushing bar tip is installed in a forward/backward moveable manner while coming in contact with each taper receiving surface. A disc-shaped revolution body is rotated and operated by using a rotating tool such as a square shape wrench inserted from the though-hole, and thereby the pushing bar is operated. The tapered part of the pushing bar is made to come in each taper receiving surface, and the outer circumferential surface is pushed to a pipe inner circumferential surface and connected therewith.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe structure joint suitable for assembling a wide variety of pipe structures mainly by connecting structural cylindrical pipes or square pipes, and more specifically, It is a joint for pipe structure material that inserts the joint insertion part into the inner diameter part of the end part, and is substantially equivalent to at least two divisions by one plane including the axis of each insertion part of the joint A pipe that has a structure that can be connected or disconnected from the pipe by combining the split parts of the half-shaped joint and incorporating a diameter expansion mechanism that can be operated from outside with a tool such as a wrench. It belongs to the technical field of joints for structural materials.

Conventionally, various joints for pipe structure materials useful for assembling pipe structures having various shapes, structures, and functions by connecting pipe structure materials have been developed and put into practical use.
For example, the joint disclosed in Patent Document 1 below is a configuration in which a joint is fitted on a synthetic resin-coated pipe in an external fitting manner, and after a resin adhesive is injected into the gap, the joint is solidified to fix the connection state. It is.
However, since this joint is configured to fix the connection state with an adhesive solution, it is necessary to connect the pipe structure material when it is repaired or modified, or completely disassembled (disassembled) and discarded. Since the state is a structure solidified by bonding as described above, disassembly is not easy, and this point is considered inconvenient to use.

Next, the pipe joint disclosed in Patent Document 2 described below is a pipe joint of a type to be inserted into (inserted into) the hollow portion of the pipe end, and first, a push pin is inserted into the hollow portion of the pipe joint. Then, the pin hole of the push pin is aligned with the pin hole provided in the diameter line direction of the pipe joint. Thereafter, the pipe joint is inserted into the hollow portion of the pipe, and the pin hole of the pipe joint is made to coincide with the center of the operation hole (through hole) provided in the diameter line direction of the pipe. Then, an elliptical pin is driven into the pin hole of the pipe joint through the through hole of the pipe, and a tool such as a hexagon wrench is inserted into the hexagonal hole of the elliptical pin. A slit that is forcibly moved in the axial direction according to the amount of eccentricity, expands the outer diameter of the pipe joint using the reverse taper formed on the inner peripheral surface of the pipe joint, and forms a fixed length from the end in the axial direction Thus, the flexible portion is pushed and expanded to expand the diameter, and is strongly pressed against the inner peripheral surface of the pipe to achieve the purpose of connection and fixation.
Therefore, the operation of rotating the elliptical pin by about 90 degrees with a tool such as a hexagon wrench can eliminate the above-mentioned connection state of the pipe, and the above-described disadvantages of the joint disclosed in Patent Document 1 are temporarily solved. Yes.

Japanese Patent No. 2919832 Japanese Patent No. 4237029

The pipe joint disclosed in Patent Document 2 achieves a pipe connection state by rotating the push pin forward or backward from the outside of the joint with a tool such as a hexagon wrench, or the connection can be easily released. Have advantages.
However, in practice, the push pin is inserted into the hollow portion of the pipe joint, and then the assembly is performed so that the center positions of the pin hole of the push pin and the pin hole of the pipe joint coincide with each other. Insert the insertion part into the pipe from the end opening of the pipe and assemble the pin hole of the pipe with the pin hole of the pipe joint, and then add the pin hole of the pipe joint to the pin provided in the pipe The task of matching the holes is not easy. Rather, it is quite cumbersome and time-consuming, and requires a user's skill and a long working time.
In addition, since this operation has to be performed for each pipe insertion portion, it takes more time, and due to workability problems, a structure that can fix and release each joint pipe insertion portion with a single operation is required. It was.

  Therefore, an object or a problem to be solved by the present invention is an invention which is made for the purpose of solving the problems or problems of the prior art described above, and it is the operation of connecting and fixing a pipe by a pipe joint, or conversely, It is to provide a joint for a pipe structure material that is simpler to operate, has better workability and efficiency, and can be easily connected to or disconnected from a pipe in a short period of time, making it easy to use. .

As a means for solving the above problems, a pipe structure joint 2 according to the invention described in claim 1 is:
A joint obtained by combining joint split pieces 2 'and 2' in which the insertion parts 21, 22, and 23 inserted into the hollow part from the end opening of the pipe 1 are at least divided into two by one plane including the respective axes. And
Each joint split piece 2 ′, 2 ′ has a bearing cylinder 24 that rotatably supports the disk-shaped rotating body 3 at a central portion on one axis passing through each insertion portion or at an intersection with each axis. A through hole 25 is provided as a tool insertion hole, such as a hexagon wrench, provided in a configuration projecting inward from the inner surface of each joint split piece 2 ′, 2 ′, and opening the bearing cylinder 24 to the outside. Inserting the bearing cylinders 24 of the joint split pieces 2 ′, 2 ′ combined and the central shaft 30 of the disk-shaped rotating body 3 so that the disk-shaped rotating body 3 is rotatably supported;
The disk-like rotating body 3 and the push rod 4 connected to the inner end thereof are arranged along the axis of each insertion portion 21, 22, 23, and a taper portion 42 formed at the tip of each push rod 4 is provided. , It is installed so as to be able to move back and forth in the axial direction while being in contact with the taper receiving surface 27 formed on the inner surface of each insertion portion 21, 22, 23,
By rotating the disk-like rotator 3 with a rotary tool 7 such as a square wrench inserted from the outside through the through hole 25 to push out or retract the push rod 4,
The taper portions 42 of the push rods 4 are advanced into the respective taper receiving surfaces 27 to widen the insertion portions 21, 22 and 23 to expand their diameters, and the outer peripheral surfaces of the insertion portions 21, 22 and 23 are made into the hollow portions of the pipes. The pipe is connected to the inner peripheral surface by pressing it, or the disk-like rotating body 3 is rotated in the reverse direction, the taper portion 42 is retracted from the taper receiving surface 27 to reduce the diameter, and the pressing force is eliminated. Thus, the connection with the joint is released.

  According to a second aspect of the present invention, in the pipe structure joint according to the first aspect, a central shaft 30 protruding from both sides of the central position of the disk-shaped rotating body 3 is provided upright. A square hole 32 into which a tool is inserted and rotated is formed on the inner surface, and along at least one disk surface along a spiral line that is sequentially opened spirally outward from the outer peripheral surface of the central shaft 30 in the radial direction. The disk-shaped rotating body 3 is formed with a plurality of spiral plates 31 protruding in a plate shape.

According to a third aspect of the present invention, in the pipe structure material joint according to the second aspect, the insertion portions 21, 22, and 23 of the pipe structure material joint 2 are arranged from the distal end portion of the insertion portion toward the center side. At least one or a plurality of slits 26 having a fixed length in the axial direction are formed so as to cause flexibility to elastically expand or restore each insertion portion radially in and out,
A groove 41 that fits with the spiral plate 31 of the disk-like rotator 3 is provided at the inner end of the push rod 4, and slides between the spiral plate 31 of the disk-like rotator 3 and the groove 41 of the push rod 4. Fitted and connected in a possible state,
The square hole 32 of the central shaft 30 of the disk-shaped rotating body 3 is a through hole, and the center of the through hole 25 of the joint for pipe structure material and the center of the square hole 25 are aligned in a straight line. And

The joint for a pipe structure material according to the invention described in claim 4 includes two insertion parts 21, 22, and 23 inserted into the hollow part from the end opening of the pipe in one plane including an axis passing through each insertion part. In addition to the structure of the split joint piece 2 ′ on one side and the joint split piece on the one side, in addition to the configuration of the insertion part of the joint split piece on the one side, A joint combining the other joint split piece 2 ″ having an axial insertion portion 29 standing vertically from the intersecting portion,
In the joint split piece on one side and the other side, a bearing cylinder 24 that rotatably supports the disk-like rotator 3 at a central part on one axis passing through each insertion part or at an intersection with each axis, A through hole 25 is provided as a tool insertion hole for the hexagon wrench 7 or the like provided so as to project inwardly from the inner surface of each joint split piece and open the bearing cylinder 24 of the joint split piece 2 'on one side to the outside. The disc-shaped rotating body 3 is set in a rotatable state by inserting the bearing cylinders 24 of the joint split pieces 2 ', 2 "and the central shafts 30 of the disc-shaped rotating body 3 into a combination. Being
A central shaft 30 protruding from both sides of the central position of the disk-shaped rotating body 3 is provided upright, and a square hole 25 through which a tool is inserted to rotate the disk-shaped rotating body 3 penetrates the inner surface of the central shaft 30. The center of the through hole 25 of the joint split piece 2 ′ on one side and the center of the square hole are aligned in a straight line,
On the other hand, the insertion portion 29 of the other joint split piece 2 ″ has a tapered portion with a reverse gradient on the outer peripheral surface, to a tapered surface 28 whose diameter increases toward the tip formed at the tip of the inner surface of the hollow portion. The taper ring 6 in which 6b is formed is fitted into the hollow portion from the distal end side of the insertion portion 29, and the bolt 8 with a square hole inserted from the opposite side with the head facing the through hole side is the taper. Screwed into the ring 6,
The bolt 8 with a square hole is rotated through the through-hole 25 and the square hole 32 of the disc-like rotator 3 with a rotary tool 7 such as a square wrench having a diameter smaller than that of the square hole 32 of the disc-like rotator 3, and tightened strongly. Then, the taper ring 6 is pulled in, the diameter of the outer peripheral surface of the insertion portion 29 is increased, and the outer diameter surface is pressed against the inner surface of the hollow portion of the pipe so that the pipe is connected.
Or, conversely, by rotating the rotating tool 7 such as a square wrench into the square hole 8b formed on the end face of the head 8a of the square hole bolt, the outer diameter surface of the insertion portion 29 is reversed. The structure is characterized in that the diameter is reduced and the connection state with the pipe is released.

The joint 2 for pipe structure material by this invention is comprised as an aggregate | assembly which combined the joint division | segmentation piece 2 ', 2' (refer FIG. 2, FIG. 3) equal to dividing into two by the common plane as an example. The both ends of the central shaft 30 of the disk-like rotating body 3 are inserted into the hollow part of the bearing cylinder 24 provided on the two divided joint pieces 2 ′ and 2 ′ so as to be rotatably supported. When the rotating body 3 is rotated by a tool 7 such as a hexagonal wrench inserted from the outside through a through hole 25 that opens the bearing cylinder 24 to the outside, each of the insertion portions 21 to 23 of the pipe structure joint 2 is respectively operated. The push rods 4 installed (incorporated) in the direction along the axis are pushed out in the axial direction of the respective insertion portions 21 to 23 and the pair of joint split pieces 2 ′ and 2 ′ forming a pair by the taper portion 42 of the push rod 4. The inner surface of the pipe 1 fitted to each of the insertion portions 21 to 23 by expanding the insertion portions 21 to 23 of the joint split pieces 2 ′ and 2 ′ to be paired by pushing up the tapered surfaces 27 and 27. The connection state of the pipe 1 is fixed. Possible reduction.
Or, conversely, when the disk-like rotator 3 is reversely rotated by the tool 7 such as the hexagonal wrench, the push bar 4 is retracted, and the approach of the tapered surfaces 27 and 27 is eliminated. Can be canceled.
Therefore, the operation of connecting and fixing the pipe 1 in the pipe joint, which is conventionally inconvenient, or the operation of releasing the connection of the pipe on the contrary can be performed mechanically easily and reliably, and the workability and efficiency are good. Moreover, each of the above operations is performed by inserting a tool 7 such as a hexagon wrench into the inside through a through-hole 25 provided in the outer surface of the pipe joint, and by rotating the tool 7 only. Since it is possible to connect and fix multiple plugs at a time, to fix, or to reverse the connection easily and reliably in a short time, no one can assemble or disassemble, modify, or modify pipe structures. However, it is easy and reliable without any skill and is very convenient to use.
Moreover, since the joint 2 for pipe structure materials of this invention is an internal fitting type structure which inserts and connects the insertion parts 21-23 or 29, such as the joint 2, etc. in the internal diameter surface of the edge part of the pipe 1, temporarily. As illustrated in FIG. 14 to FIG. 16 described above in Patent Document 1 (Patent No. 2919832), two sandwiching ribs 100 that support a panel or the like 101 such as a plate shape or a net shape are formed over the entire length in the axial direction. Even when the ribbed pipe 1 ′ is used, there is an advantage that a structure with a clean appearance can be produced simply by cutting the end of the holding rib 100 in a 45 ° direction, for example, as shown in FIG. 15.

The perspective view which showed Example 1 of the coupling for pipe structure materials by this invention. The perspective view which decomposed | disassembled and showed the structure of the coupling for pipe structure materials of the said FIG. The perspective view which showed the structure of the coupling for pipe structure materials of the said FIG. 1 in the middle of an assembly. A, B, and C are perspective views showing different angles of the disk-shaped rotating body. A and B are perspective views showing the push rod from different angles. The front view which showed Example 2 of the joint for pipe structure materials by this invention in the half-section state. The disassembled perspective view which showed Example 3 of the coupling for pipe structure materials by this invention. The disassembled perspective view which showed Example 4 of the joint for pipe structure materials by this invention. It is the perspective view which showed the structure of the joint for pipe structure materials in the decomposition | disassembly state. The perspective view which showed the use condition of Example 5 of the joint for pipe structure materials by this invention. The disassembled perspective view of Example 5 of the joint for pipe structure materials by this invention. The arrow directional cross-sectional view cut | disconnected by the aa line. A and B are perspective views showing the tapering from different angles. A and B are perspective views showing a ribbed pipe to which a pipe structure joint can be easily applied. FIG. 9A is a perspective view showing a use state of the elbow joint of FIG. 8 applied to a pipe structure material. The front view of the product example which connected and assembled the pipe with a rib with the coupling of this invention.

Example 1 of the present invention will be described below.
First, the joint 2 for pipe structure shown in FIGS. 1 to 3 shows an embodiment of a T-shaped joint that connects three pipes 1 in a T-shaped arrangement in three directions at right angles as shown in FIG. Yes.
The pipe structure material joint 2 has an internal fitting type structure in which the insertion portions 21, 22, and 23 of the joint 2 are inserted into and connected to the hollow portion from the end opening of the pipe 1. The applicable pipe 1 can be used regardless of the material such as various metal pipes or synthetic resin pipes. Moreover, although the example of illustration has shown circular tube as object, it can implement similarly as a joint which makes an elliptical tube, a square tube, a polygonal tube, etc. object.
The T-shaped joint for pipe structure material 2 shown in FIG. 1 is configured as a set of components shown in FIGS. 2 and 3. That is, in the case of the first embodiment, the three insertion portions 21, 22, and 23 to be inserted into the hollow portion from the end opening of the pipe 1 are divided into two equal parts by one plane that includes each axis in common. The two right and left joint split pieces 2 ′ and 2 ′ are combined (FIG. 2).
In each of the joint split pieces 2 ′ and 2 ′, the bearing is located at a position corresponding to the intersection where the axis common to the two insertion portions 21 and 22 arranged in the left and right sides and the axis of the downward insertion portion 23 intersect. A cylinder 24 is provided so as to protrude inward from the inner surface of each joint split piece 2 ′, 2 ′.
In the two joint split pieces 2 ′ and 2 ′, a through hole 25 for opening the hollow portion of the bearing cylinder 24 (see FIG. 2) to the outside serves as an insertion hole for the rotary tool 7 such as a hexagon wrench. It is provided in the split pieces 2 ′, 2 ′. Then, the joint split pieces 2 ′, 2 ′ are arranged so that the center of the through hole 25 of the joint for pipe structure material 2 and the center of the square hole 32 of the disk-like rotating body 3 to be described later are aligned. The center shaft 30 of the disk-shaped rotating body 3 is inserted in a rotatable state in the cylinder of the bearing cylinder 24 that is disposed opposite to each other, and the outer peripheral surface of the center shaft 30 and the inner peripheral surface of the bearing cylinder slide. It is installed as possible. The inner surface of the central shaft 30 of the disk-shaped rotating body 3 is formed with a square hole or a hexagonal square hole 32 as a through hole so that a rotating tool 7 such as a hexagonal wrench can be used. Yes. However, the square hole 32 is. Since the rotary tool only needs to enter the hole and rotate the disk-shaped rotating body 3, it may not be a through-hole, but since a force is applied, a through-hole capable of receiving a force over a long distance is preferable.
A tool 7 such as a hexagon wrench inserted through the through hole 25 communicating with the bearing cylinder 24 of the joint split piece 2 ′ is inserted into a square hole 32 formed in the central shaft 30 of the disk-shaped rotating body 3 and rotated. The disk-shaped rotating body 3 can be freely rotated in both forward and reverse directions from the outside of the joint split piece 2 ′, and the connection and release of the pipe 1 can be easily and reliably performed by a mechanical method as will be described later. Can be done.

  As described above, when the pipe structure joint 2 according to the first embodiment is used, it can be applied to various types of pipes 1 to connect and fix or release the connection of the rotary tool 7 such as the hexagon wrench. By using it, it is extremely easy and reliable. Therefore, not only the assembly (construction) of pipe structures of various forms, but also the modification, or dismantling and disposal when they become useless, can be easily performed by releasing the connection of each pipe. it can. Of course, the pipe structure can be constructed again and freely by using the pipe structure joint 2.

In addition, about the structure of the said disk shaped rotary body 3, as shown in detail in FIG. 4A, B, C, the center axis | shaft 30 protruding from there is standingly arranged on both surfaces of the center position of the disk shaped rotary body 3 The inner surface of the central shaft 30 is formed with a square hole 32 into which a tool can be inserted and rotated, and one side (or both surfaces) of the disk formed on the outer periphery of the central shaft 30 on at least one of the disk surfaces. In addition, as shown in FIG. 4B, a spiral plate that protrudes from the outer peripheral surface of the central shaft 30 along a spiral that sequentially expands outward in the radial direction into a spiral shape and projects in a strip shape in the axial direction. A plurality of 31 are formed.
When the above-described joint split piece 2 ′ is combined, the outer peripheral surface of the central shaft 30 of the disk-like rotating body 3 is supported by the bearing cylinders 24 so that both ends can rotate. 5A and 5B, the push rod 4 has a tapered portion 42 formed at the tip portion, and a groove portion 41 that fits with the spiral plate 31 of the disk-shaped rotating body 3 is formed at the other end. It is provided and is arranged with the groove 41 at the inner end along the center line of each of the pipe insertion portions 21 to 23 of the joint split piece 2 ′, and can be freely moved back and forth in the axial direction. Is done. And the taper taper part 42 formed in the front-end | tip part of each push rod 4 closely contacts with the taper receiving surface 27 of the same inclination formed in the front-end | tip inner peripheral surface in each said joint division | segmentation piece 2 '. It is arranged and installed in a state that allows movement in the axial direction.

As described above, the hollow inner surface of the central shaft 30 is formed in the square hole 32 in the disc-like rotating body 3 installed on the inner surface of the pair of joint split pieces 2 ′ and 2 ′. Therefore, the disk-like shape can be obtained by inserting a rotating tool 7 such as a hexagonal wrench from the outside through the through hole 25 of the joint split piece 2 ′, and inserting it into the square hole 32 and rotating it from the outside of the joint. The rotating body 3 can be rotated by a predetermined rotation angle in the forward or reverse direction.
Then, the spiral plate 31 of the disk-shaped rotating body 3 and the groove portion 41 of the push rod 4 are engaged with each other in a slidable state and connected to each other, and the disk-shaped rotating body 3 is rotated according to the rotation of the disk-shaped rotating body 3. The push rod 4 connected to the spiral piece 31 formed in 3 is pushed out in the axial direction or pulled back. Thus, when the tapered taper portion 42 of the push bar 4 is inserted between the taper receiving surfaces 27 and 27 of the joint split pieces 2 'and 2', the joint split pieces 2 'and 2' are mutually connected by the pressing action. The outer diameter surface of the insertion portions 21 ′ to 23 ′ can be pressed against the inner surface of the hollow portion of the pipe 1 to fix the connection state with the pipe 1.
When the disk-shaped rotating body 3 is reversed, the push rod 4 is pulled back along with the reverse rotation of the spiral piece 31 formed on the disk-shaped rotating body 3, and the taper portion 42 of the push rod 4 is paired with a pair. The joint split pieces 2 ′ and 2 ′ are pulled out from between the taper receiving surfaces 27 and 27 and retracted. Therefore, the action force that the outer peripheral surface of the insertion portion of the joint split pieces 2 ′, 2 ′ forming a pair presses the inner peripheral surface of the pipe 1 is eliminated, and the connection state between the joint 2 and the pipe 1 is released.
Therefore, unless the pipe for which the structure is to be made is a relatively flexible synthetic resin pipe, in the case of a hard pipe such as a steel pipe, it is easy to push the inner surface of the pipe hollow part to achieve a strong connection state. In addition, a slit 26 having a fixed length in the axial direction from the distal end portion of the insertion portion to the center side is elastically expanded in each radial direction inward and outward at each insertion portion of the joint for a pipe structure material. Alternatively, it is preferable that at least one or a plurality are formed so as to provide flexibility to restore.

Next, the second embodiment shown in FIG. 6 is also an embodiment related to claim 1, and the three insertion portions 21, 22, 23 to be inserted into the hollow portion from the end opening of the pipe 1 are: Each joint line is composed of a combination of two joint divided pieces 2-1, which are equivalently divided into two equal parts by a single plane including each axis. (See Figure 6)
The joint split piece 2-1 has a bearing cylinder 24 that rotatably supports the disc-like rotating body 3 ′ at a central portion on one axis passing through each insertion portion 21, 22 or at an intersection with each axis. The through-holes that open inwardly from the inner surface of each joint split piece 2-1 and that open the bearing cylinder 24 to the outside are provided as tool insertion holes such as a hexagon wrench. The configuration similar to that of the first embodiment is that the central axis of the disk-shaped rotating body 3 ′ is inserted into the bearing cylinder 24 of the joint split piece 2-1 in a rotatable state.
However, in the second embodiment, the pin 33 is provided at a position spaced apart from the rotation center of the disk-shaped rotating body 3 ′ by a certain rotation radius. Three folding links 44 that are foldably connected are arranged at a rotation angle of 90 degrees, and the inner end portions of the respective folding links 44 are pivotally connected to the corresponding pins 33. In the case of the present embodiment, a taper taper-shaped portion 43 is attached to the distal end portion of each half-broken link 44, and the taper taper-shaped portion 43 is respectively connected to the joint divided pieces 2-1, 2-1. It is configured so as to approach between the taper receiving surfaces 27 ′ and 27 ′ formed with the same gradient on the inner periphery of the tip. This pipe structure material joint 2 is of a type in which the joint link 44 is fixed by retracting the center link 44 by the forward rotation of the disk-shaped rotating body 3 ', and the taper inclination direction of the joint is opposite to that of the first embodiment. The movement of the broken link in the direction of fixing the joint insertion part is also reversed.

Next, the pipe structure material joint 2 shown in FIG. 7 is a type useful for connecting pipes long in a straight line, and left and right insertion portions 21 and 22 to be inserted into the hollow portion from the open end face of the pipe 1 are provided. This is a pipe structure joint 2 having a configuration having a straight common axis and composed of a combination of divided pieces 2 'and 2' divided into two planes along the common axis.
The basic configuration is the same as that of the first embodiment, and when the pipe 1 is connected, each push-in portion of the pipe 1 can be fixed by expanding the diameter, or can be released by reducing the diameter by moving the push rod 4 back and forth. The above-described mechanism is that the disk-shaped rotating body 3 is rotated in the forward and reverse directions with a rotating tool 7 such as a square wrench inserted through the through-hole 25 of the divided piece 2 ′ or 2 ′. The same as Example 1.

The pipe structure joint 2 shown in FIG. 8 has an elbow-type configuration in which two insertion portions 21 and 23 inserted into the hollow portion from the opening end face of the pipe are bent in two directions at right angles. And 23 are constituted by a combination of divided pieces 2 'divided in two along a plane along each common axis.
The two insertion portions 21 and 23 are provided with an inward bearing cylinder 24 rotatably supporting the central axis 30 of the disc-like rotating body 3 at the intersection of the two axes. The through-hole 25 that communicates with the outside is provided in each of the divided pieces 2 ′ and 2 ′.

  The push rod 4 is moved by rotating a rotating tool 7 such as a hexagonal wrench inserted into the disk-shaped rotating body 3 through the through holes 25 of the divided pieces 2 'and 2' in the forward and reverse directions. The configuration in which the connection or release with the pipe 1 can be achieved by the forward and backward movement of the push rod 4 is the same as in the above embodiments.

15 and 16 show a preferred use example of the elbow type pipe structure joint 2 shown in FIG.
That is, as illustrated in FIG. 14, the two ribs 100 and 100 suitable for sandwiching the panel plate and the like are protruded (upright) with an arrangement extending over the entire length of the outer peripheral surface in the axial direction of the pipe. When the pipe 1 ′ is used in a configuration in which the ribs 100 protrude toward the inner surfaces of the four corners of the frame as shown in FIG. 16 and sandwich the periphery of the panel, the open ends (cut end surfaces) of the pipes 1 ′ with ribs are used. When the ends of the ribs 100 appearing in Fig. 15 are cut in a 45 degree direction as shown in Fig. 15 and abutted, the corners where the ribs fit together have a clean and clean appearance, and on top of that, for elbow-type pipe structure materials If the joint 2 is used, the two ribbed pipes 1 ′ and 1 ′ can be connected in exactly two directions at right angles, and a product such as a partition panel to which the panel 101 is attached can be easily assembled.

Next, Example 5 shown in FIGS. 9 to 12 will be described.
The fifth embodiment basically has many common points with the first embodiment which has already been described with reference to FIGS.
Extremely speaking, as apparent from the comparison between FIG. 1, FIG. 3, FIG. 9 and FIG. 10, the T-shaped joint connects three pipes 1 in a T-shaped arrangement in three directions at right angles. The shape of the joint split piece 2 ′ on one side located on the other side (or the left side) in FIG. 10 is common to the joint split piece 2 ′ of the T-shaped joint shown in FIGS. The major difference lies in the configuration of the joint split piece 2 ″ located on the other side, that is, the front side in FIG. 10. That is, the pipes arranged to connect the three pipes 1 in a substantially T shape when viewed in the front direction. In addition to the insertion portions 21, 22 and 23, the joint split piece 2 ″ located on the near side in FIG. 10 is further provided with a fourth pipe insertion portion 29 in a direction perpendicular to the split plane. It has the characteristics.
More specifically, in the pipe structure joint 2 according to the fifth embodiment, the insertion portions 21, 22 and 23 in three directions to be inserted into the hollow portion from the end opening of the pipe 1 are arranged in a T shape in three directions. In addition, a fourth insertion portion 29 is provided in an arrangement along the axis perpendicular to the dividing plane from the position of the intersection where the axes of the insertion portions 21, 22 and 23 in the three directions intersect. It has a feature in configuration. That is, the pipe structure joint 2 according to the fifth embodiment is characterized in that it is a joint that can connect a total of four pipes 1 together.

  The presence of the joint split piece 2 ″ is such that two pipes 1 in a straight line direction and one pipe 1 in total in a vertical direction can be connected in a T-shaped arrangement, and further, a direction perpendicular to the split plane. It is possible to connect another pipe 1 to a fourth insertion portion 29 provided along the axis of the second insertion portion 29.

A bearing cylinder 24 (see FIG. 12) for supporting one end of the central shaft 30 of the disk-like rotating body 3 on the inner wall equivalent portion in the vicinity of the rise of the fourth insertion portion 29 is also provided on the inner surface portion of the joint split piece 2 ″. Also, it is provided symmetrically with a configuration that protrudes inward.
Further, the central shafts 30 at both ends of the disk-shaped rotating body 3 can be rotated into the cylinders of the bearing cylinders 24 provided to face the inner surface portions of the joint split pieces 2 ′ and 2 ″ on both sides. A through hole 25 for opening the hollow portion of the bearing cylinder 24 to the outside as an insertion hole for a rotary tool such as a hexagon wrench 7 is also provided in the joint split piece 2 ′ on one side. Common to the first embodiment.
Also, the pipe insertion portions 21 to 23 and 29 in the respective directions also have a slit 26 having a certain length in the axial direction from the respective distal end portions toward the central portion, so that the insertion portions 21 to 23 and 29 are arranged in the radial direction. At least one or a plurality are formed so as to have the flexibility of elastically expanding or restoring (reducing diameter) in the inner and outer directions.

The inner surface of the central shaft 30 of the disk-shaped rotating body 3 is traversed so that it can be rotated by the rotary tool 7 such as a hexagonal wrench inserted through the aforementioned through-hole 25 provided in the joint split piece 2 ′. Spiral lines whose surfaces are formed in square holes 32 such as quadrangular or hexagonal shapes and are sequentially opened in a spiral shape outwardly in the radial direction from the outer peripheral surface of the central shaft 30 to at least one disk surface of the disk-shaped rotating body 3. In addition, the configuration in which a plurality of spiral plates 31 protruding in a plate shape along the axial direction is formed in parallel in the circumferential direction is also as described above.
A push rod 4 having a groove portion 41 or a pin-like convex portion that can be linked to any one spiral plate 31 of the disk-like rotating body 3 at the inner end portion is combined with the joint split pieces 2 ′ and 2 ″. It is arranged along each axis of each insertion part 21 to 23 and installed so as to be capable of moving back and forth in the axial direction.
Further, a tapered tapered portion 42 formed at the distal end portion of each push rod 4 is a taper formed on the inner surface of the distal end portion of each insertion portion 21 to 23 of each of the joint split pieces 2 ′ and 2 ″ in the T-shaped arrangement. It can be moved back and forth in the axial direction while being in contact with the receiving surface 27, and is formed in the hollow portion of the central shaft 30 of the disk-shaped rotating body 3 installed inside the split joint split pieces 2 ′ and 2 ″. A rotating tool 7 such as a hexagonal wrench inserted from the outside through the through hole 25 of one joint split piece 2 ′ is inserted into the square hole 32 of the disk-shaped rotating body 3 and rotated. About the method of operating and fixing to the pipe 1 of each insertion part 21-23 on a division | segmentation plane, it has the same form as said each Example.

The configuration characterized by the fifth embodiment is the fourth pipe extending along the axis in the direction perpendicular to the dividing plane in the state where the joint dividing piece 2 ″ shown on the front side in FIG. The taper ring 6 is attached to the distal end portion of the insertion portion 29.
As shown in FIGS. 13A and 13B, the taper ring 6 has a square hole bolt 8 screwed into the center of an outer diameter barrel portion 6c that can be fitted into the inside from the tip opening of the fourth pipe insertion portion 29. The nut 6a is insert-molded. Further, at the rear edge portion of the outer peripheral surface of the body portion 6c of the taper ring 6, a divergent taper surface 6b having a gradient matching the divergent taper surface 28 formed on the inner peripheral surface of the tip end of the fourth pipe insertion portion 29 is provided. Is formed.
Therefore, the taper ring 6 fits into the inner peripheral part of the mouth from the tip side of the fourth pipe insertion part 29. At that time, the concave portion indicated by reference numeral 6d in FIG. 11 is fitted into a rotation-preventing protrusion 29a formed on the inner peripheral surface of the distal end portion of the fourth pipe insertion portion 29, so that the taper ring 6 is held in the rotation-preventing state.
When the joint split piece 2 ″ is still in the separated state shown in FIG. 10, the bolt 8 with a square hole is inserted from the end surface of the bearing cylinder 24 on the split surface side as shown in FIG. It is inserted toward the hole side and lightly screwed into the insert nut 6a (so as not to hinder the insertion of the pipe 1 into the fourth pipe insertion portion 29) and temporarily fixed.
After that, the joint split piece 2 ′ and the joint split piece 2 ″ are combined into the shape of the pipe structure joint 2 by combining the concave and convex portions (10, 11) of the joint split pieces on the split surface. .
The end surface of one central shaft 30 of the disc-shaped rotating body 3 placed between the bearing cylinder 24 of the joint segment 2 ′ and the bearing cylinder 24 of the joint segment 2 ″ is in contact with the end surface of the bolt head 8a. The pipe insertion portion 29 is fixed in such a manner that the rotating tool 7 inserted through the through hole 25 passes through the square hole 32 of the central shaft 30 of the disk-shaped rotating body 3 and the square hole bolt 8 is fixed. This is done by inserting it into the square hole 8b of the head 8a and rotating it. As can be understood from FIG. 12, the hexagon wrench or the like used for the square hole 8b of the head 8a of the bolt 8 with square holes is a disk-shaped rotation. Although the inner diameter of the square hole 32 of the body 3 is smaller than the inner diameter of the square hole 32 and applicable to the rotation of the square hole 8b of the head 8a of the bolt 8 with a square hole, In order to rotate the piece or the disk-shaped rotating body 3 A wrench having a size larger than that of the wrench and adapted to the inner diameter of the square hole 32 is used.
In this way, the fixing or releasing of the pipe 1 fitted to the fourth pipe inserting portion 29 can be mechanically ensured, and the inserting portions 21 to 23 can also be fixed or released mechanically reliably. In addition to the example 1, the fourth insertion portion, that is, the pipes 1 in four directions can be connected together.

  Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will mention that just in case.

1, 1 'pipe 2 pipe structure joint 2', 2 ", 2-1 joint split piece 3, 3 'disk-like rotating body 4 push rod 6 taper ring 6a insert nut 7 hexagon wrench (rotary tool)
8 Bolt with square hole 8b Square hole 21, 22, 23 Insertion part 24 Bearing cylinder 25 Through hole 26 Slit 27, 27 'Tapered receiving surface 29 Fourth insertion part 30 Central shaft 31 Spiral plate 32 Square hole 33, 40 Pin 41 Groove part 42 Taper part 43 Tapered taper part 44 Middle broken link

Claims (4)

The insertion part inserted into the hollow part from the end opening of the pipe is a joint obtained by combining joint split pieces equal to at least two splits by one plane including each axis, and each joint split piece includes A bearing cylinder is provided at a central portion on one axis passing through each insertion portion or at an intersection with each axis so as to protrude inward from the inner surface of each joint split piece, and opens the bearing cylinder to the outside. A through hole is provided as a tool insertion hole such as a hexagon wrench, and the disk-like rotating body is rotatably supported by each bearing cylinder of the combined joint split piece,
A push rod connecting the disk-shaped rotating body and its inner end is disposed along the axis of each insertion portion, and a tapered portion formed at the tip of each push rod is formed on the inner surface of each insertion portion. Installed in such a way that it can move back and forth in the axial direction while being in contact with the taper receiving surface.
With a rotating tool such as a rectangular wrench inserted from the outside through the through-hole, by rotating the disk-shaped rotating body to push out or retract the push rod,
The taper portion of the push rod is advanced into each taper receiving surface to expand and widen the insertion portion, and the outer peripheral surface of the insertion portion is pressed against the inner peripheral surface of the pipe to connect the pipe, or the disk A pipe having a configuration in which a rotating member is rotated in a reverse direction, the taper portion is retracted from the taper receiving surface to reduce the diameter, the pressing force is released, and the connection with the joint is released. Joint for structural materials.   A central axis protruding from both sides of the central position of the disk-shaped rotating body is erected, and an inner surface of the central axis is formed with a square hole that can be rotated by inserting a tool, on at least one disk surface, The disk-shaped rotating body is formed with a plurality of spiral plates protruding in a plate shape along spiral lines that are sequentially opened spirally outward from the outer peripheral surface of the central axis in a radial direction. The joint for pipe structure materials according to 1. A slit having a fixed length in the axial direction from the distal end of the insertion portion to the center side is elastically expanded or restored to each insertion portion radially in and out of the insertion portion of the pipe structure joint. At least one or more are formed so as to be flexible;
The inner end portion of the push rod is provided with a groove portion that fits with the spiral plate of the disk-shaped rotating body, and the swirl plate of the disk-shaped rotating body and the groove portion of the push rod are slidably engaged and connected. Was it,
The square hole provided in the central axis of the disk-shaped rotating body is a through hole, and the center of the through hole of the joint for pipe structure material and the center of the square hole are aligned on a straight line,
The joint for pipe structure materials according to claim 2 characterized by each. One side of the joint split piece divided into two on one plane including the axis passing through the insertion part into the hollow part from the end opening of the pipe, and the insertion part of the one side joint split piece In addition to the above-mentioned configuration, a combination of a central portion on one axis passing through each insertion portion with respect to the one plane or a joint split piece on the other side having an insertion portion in the axial direction standing perpendicularly from the intersection of each axis. Couplings,
The joint split piece on the one side and the other side includes a bearing cylinder that supports a disk-like rotating body at a central portion on one axis passing through each insertion portion or an intersection with each axis. Provided in a configuration projecting inwardly from the inner surface, and a through hole for opening the bearing cylinder to the outside as a tool insertion hole such as a hexagon wrench is provided in the joint split piece on one side. The disk-like rotating body is rotatably supported by each bearing cylinder of the split piece;
A central axis protruding from both sides of the central position of the disk-shaped rotating body is erected, and a square hole through which a tool is inserted to rotate the disk-shaped rotating body is formed as a through hole on the inner surface of the central axis. The center of the through hole of the joint split piece on one side and the center of the square hole are aligned in a straight line, while the insertion part of the joint split piece on the other side is at the tip of the inner surface of the hollow part. The taper ring with the tapered portion with the reverse slope formed on the outer peripheral surface is fitted into the hollow portion from the distal end side of the insertion portion into the hollow portion. A bolt with a square hole inserted with the head facing the through hole side is screwed into the taper ring;
With a rotating tool such as a square wrench having a smaller diameter than the square hole of the disk-shaped rotating body, the taper ring is drawn by rotating the bolt with the square hole through the through hole and the square hole of the disk-shaped rotating body. Expanding the outer peripheral surface of the pipe, pressing the outer peripheral surface of the insertion portion against the inner peripheral surface of the pipe, and connecting the pipe
Or, conversely, a rotating tool such as a square wrench is inserted into the square hole formed on the end face of the head of the square hole bolt and reversed to reduce the outer diameter surface of the insertion portion. A joint for a pipe structure material, characterized in that the connection state with the pipe is released.

Images