JP2000290999A - Columnar body and connecting structure therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide columnar bodies which have high connectability such that the columnar bodies can be easily and securely connected together and to provide a connecting structure therefor. SOLUTION: An annular outer groove 12 is provided in at least one part of the outer peripheral surface of an inner column part 11 and an annular inner groove 22 is provided in at least one part of the inner peripheral surface of an outer pipe part 21. A ring-shaped member which is resiliently variable in diameter is formed in such a way as to be capable of being stored in a position where it is withdrawn into the depth from the entrance of the outer groove 21 or inward groove 22. With the inner column part 11 fitted into the outer pipe part 21 of a different columnar body, the ring-shaped member 3 is interposed between the outer groove 12 and the inner groove 22 of the different columnar body and is mounted in either the outer groove 12 or inner groove 22 which can accommodate it, in such a manner that the ring-shaped member 3 can be held engaged with both grooves. A tapered end 1a which can freely make contact with the ring-shaped member 3 is formed on at least either one of the outer end edge of the inner column portion or the inner end edge of the outer pipe portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a columnar body provided with a pair of inner columnar portions and an outer tube portion at both ends, and one end of a first columnar body and one end of a second columnar body. In addition, a pair of inner pillars and outer pipes are distributed and provided, and the connection structure of the pillars connecting the inner pillars and the outer pipes to each other, for example, a landslide prevention pile or the like to a number of pillars. The present invention relates to a technique used in a case where a plurality of columnar bodies are provided by being divided and connected at a place of use.

[0002]

2. Description of the Related Art Conventionally, as a columnar body of this kind and a connecting structure of the columnar bodies, a first columnar body and a second columnar body are connected by welding or the like. According to the report, it takes a long time to connect, depending on the weather, it is not available at the place of use, or because it requires advanced technology, there is a tendency for technicians to be short, so it is difficult to connect easily. There are situations where a pillar and a connection structure between the pillars are desired. Therefore, in recent years, a pair of inner pillars and an outer pipe are separately provided at one end of the first pillar and one end of the second pillar, and an outer groove is provided in the inner pillar, and the outer pipe is provided. 2. Description of the Related Art There is known a columnar body and a columnar body connection structure in which an inner groove portion is provided in a portion, formed so as to be screwably connected to each other, and connected by screwing each other.

[0003]

However, according to the above-mentioned conventional technique using screwing, the machining for forming the screwing grooves (the outer groove and the inner groove) belongs to a difficult class, and such machining is difficult. The processed columnar member is inevitably expensive, and especially when the columnar member is heavy, the screwing operation requires a great deal of labor, and the screwing operation is difficult. If the screw groove is damaged during operation or the like, the screwing operation becomes more difficult, and it is regarded as a problem that the workability at the place of use of the columnar body is greatly adversely affected.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a columnar body and a connection structure for the columnar body, which can easily and surely connect the columnar bodies in view of the above-mentioned drawbacks, and have high connection workability.

[0005]

Means for Solving the Problems [Structure 1] A columnar body according to the present invention for achieving the above object has an inner pillar portion and an outer tube portion distributed to both end portions as described in claim 1. The inner column portion and the outer tube portion are configured to be fittable and connectable between different columnar bodies, and at least one annular outer groove portion is provided on an outer peripheral surface of the inner column portion, At least one annular inner groove portion is provided on the inner peripheral surface of the outer tube portion, and a ring-shaped member elastically variable in diameter is provided.
The outer groove portion or the inner groove portion is formed so as to be able to be accommodated in a state of being retracted to the back from the entrance, and in a state where the inner column portion is fitted into the outer tube portion of a different columnar body, the ring-shaped member is connected to the outer groove portion and the outer groove portion. The inner column portion is interposed between the inner groove portion and the inner column portion of the different columnar body, and is attached to a side of the outer groove portion or the inner groove portion that can accommodate the ring-shaped member so that the inner column portion can be held in an engaged state. At least one of the outer edge of the outer tube or the inner edge of the outer tube,
A tapered end (1) which can freely contact the ring-shaped member (3)
The feature is that a) and (2a) are formed. [Operation and Effect] According to this configuration, when the adjacent columnar bodies are fitted and connected to each other, the ring-shaped members are fitted in a state where the ring-shaped members are housed in a state of being retracted deep from the entrance of the outer groove or the inner groove. When the joining operation is performed, the inner column portion and the outer tube portion can be easily fitted without the tapered end portion being caught by the ring-shaped member, and the ring-shaped member is formed by the outer groove portion and the inner groove portion. , It is possible to improve the operability at the time of performing the fitting operation, and to improve the on-site workability, reduce the labor, and reduce the labor cost according to the labor. It is possible to reduce the cost and to construct the columnar body at low cost.

That is, for example, a tapered end is formed at an outer edge of the inner column, and the inner column is connected to the outer tube while the ring-shaped member is engaged with the inner groove. When fitted into the portion, the tapered end abuts on the ring-shaped member protruding from the inner groove portion, pushes the ring-shaped member against the urging force, spreads over the tapered end portion, and passes through the outer groove portion. When the engagement state is reached, the inner pillar portion can be inserted into the outer tube portion. Therefore,
The pillars can be easily and reliably connected to each other, which can be used to improve the on-site workability of the pillars. In this case, an operation of fitting the inner column into the outer tube,
There is an advantage that the diameter changing operation of the ring-shaped member can be performed at the same time, and it can be said that the operability is excellent.

[0007] Further, a tapered end is formed at an inner edge of the outer tube portion, and the inner pillar portion is connected to the outer tube portion in a state where the ring-shaped member is engaged with the outer groove portion. When fitting, the tapered end abuts on the ring-shaped member protruding from the outer groove, pushes the ring-shaped member against the urging force, spreads over the tapered end, and engages with the inner groove. When the engagement state is reached, the inner pillar portion can be inserted into the outer tube portion. Therefore, the pillars can be easily and reliably connected to each other, which can be used to improve the on-site workability of the pillars. In this case, there is an advantage that the operation of fitting the inner column portion into the outer tube portion and the diameter changing operation of the ring-shaped member can be performed simultaneously,
It can be said that the operability is excellent.

[Structure 2] The connection structure of the columnar body of the present invention is as follows.
As described in claim 2, an inner column and an outer tube are separately provided at one end of the first column and one end of the second column, and the inner column and the outer tube are mutually connected. For connection, at least one annular outer groove portion is provided on the outer peripheral surface of the inner pillar portion, and at least one annular inner groove portion is provided on the inner peripheral surface of the outer tube portion, and the diameter can be elastically changed. A ring-shaped member that can be accommodated in a state of being retracted deep from the entrance of the outer groove or the inner groove is provided on at least one of an outer edge of the inner column and an inner edge of the outer tube. The ring-shaped member (3) is formed with tapered ends (1a) and (2a) that can freely contact with the ring-shaped member (3). Interposed between both the groove and the inner groove, Characterized in that held in the engaged state. [Operation and effect] With this configuration, an inner column and an outer tube are separately provided at one end of the first column and one end of the second column, and the inner column and the outer tube are mutually connected. For connecting, at least one annular outer groove portion is provided on the outer peripheral surface of the inner column portion, and at least one annular inner groove portion is provided on the inner peripheral surface of the outer tube portion. The outer groove and the inner groove can be arranged so as to face each other on the inner side where the inner column is fitted into the outer tube when the inner column is fitted into the inner tube. Therefore, if a ring-shaped member is interposed between the outer groove portion and the inner groove portion and held in an engaged state with both of the outer groove portion and the inner groove portion, the ring-shaped member has the outer tube portion and the inner column portion. Between the first columnar body and the second columnar body. Further, a ring-shaped member is provided in a state of being retreated to the back from the entrance of the outer groove or the inner groove, and at least one of the outer edge of the inner pillar or the inner edge of the outer tube, Since the tapered end portions (1a) and (2a) that can freely contact the ring-shaped member (3) are formed, it is necessary to hold the ring-shaped member between the outer tube portion and the inner pillar portion. The inner column portion and the outer tube portion may be fitted to each other in a state where the ring-shaped member is held in a state of being retracted from the entrance of the outer groove portion or the inner groove portion, and the fitting operation causes the tapered end portion. Can easily fit the inner column portion and the outer tube portion without being caught by the ring-shaped member, so that the reliable connection structure can be obtained by a simple operation.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] As shown in FIGS. 1 to 8, a columnar body of the present invention is formed by welding a steel tubular joint to one end of a steel tubular first columnar body 1 to form an inner pillar. 11 and a steel tubular joint portion is welded to one end of the steel tubular second columnar body 2 to provide an outer tube portion 21, and an annular outer groove portion is formed on the outer peripheral surface of the inner pillar portion 11. 12 and an annular inner groove 22 on the inner peripheral surface of the outer tube 21, and the inner column 11 is fitted into the outer tube 21 for connection.
A ring-shaped member 3 which can be changed in diameter and can be accommodated in a state of being retreated to the back from the entrance 22a of the inner groove portion 22 is mounted on the outer groove portion 12 with the inner column portion 11 fitted in the outer tube portion 21. It is interposed between the inner groove portion 22 and the inner groove portion 22 and is held in an engaged state with both.

The outer tube portion 21 is provided with a through hole 4 communicating with the inside and outside of the inner groove portion 22 to form an operation portion A for changing the diameter of the ring-shaped member 3.
Further, the steel forming the joint portion is configured to have higher strength than the steel forming the first and second columnar bodies 1 and 2.

[0011] Such a columnar body is formed as follows. The “width” of the ring-shaped member 3 according to the present invention is the length in the radial direction when the ring-shaped member 3 is cut in the radial direction, and the “thickness” is the ring-shaped member 3. Refers to the length in the axial direction of. The “width” of each of the grooves 12 and 22 is defined as the entrance 1 as viewed in the axial direction of each of the columns 1 and 2.
2a and 22a are open distances, and "depth" refers to the distance to retreat in the radial direction with respect to each of the columnar bodies 1 and 2.

[Embodiment 1-1] An example of the embodiment will be described below with reference to the procedures shown in FIGS. (1) As shown in FIG. 1A, a steel tubular joint is welded to one end of a steel tubular first columnar body 1 to provide an inner pillar 11 in advance, and the steel tubular joint is provided. A steel tubular joint is welded to one end of the tubular second columnar body 2 to provide an outer tube 21, and an annular outer groove 12 is provided on the outer peripheral surface of the inner column 11, An annular inner groove 22 is provided on the inner peripheral surface of the tube 21, and the outer tube 21 has
The inner groove 22 having a through hole 4 communicating with the inside and the outside, and an inner diameter smaller than the diameter of the entrance 12a of the outer groove 12 in a natural state, and an outer diameter of the inner groove 22
A C-ring 31 made of a spring material, which is larger than the diameter of the entrance 22a of the C-ring, and is longer than the opening 31a of the C-ring 31, and when fitted into the opening 31a of the C-ring 31, A spacer 51 made of a thermoplastic resin having such a size as to push the inner diameter of the inner groove 22 larger than the diameter of the entrance of the inner groove 22 is prepared. In addition, the depth of the inner groove 22 is formed larger than the width of the C ring 31, and the depth of the outer groove 12 is formed smaller than the width of the C ring 31. . (2) Insert the C-ring 31 into the inner groove 22,
The spacer 51 is inserted into the opening 31a of the C-ring 31.
The C ring 31 is expanded to have a large diameter state by being fitted thereinto, and the C ring 31 is accommodated deeply from the entrance of the inner groove 22. At this time, the spacer 51 is arranged at a position facing the through hole 4. (3) The inner column portion 11 is fitted into the outer tube portion 21, and the inner groove portion 22 and the outer groove portion 12 are arranged so as to face each other. (See FIGS. 1 (b) and 2 (a).) (4) By heating and melting the spacer 51 from the through hole 4 and reducing the diameter of the C ring 31,
The outer groove portion 12 and the inner groove portion 22 are interposed between both of them, and both of them are held in an engaged state. (5) The space between the inner groove 22 and the C-ring 31 is filled with a curable filler a to fix the C-ring 31 and prevent rattling (FIG. 1 (c), FIG. 2 (b)). Thereby, the first columnar body 1 and the second columnar body 2
Is in a state of being connected to each other via the C-ring 31 in an engaged state.

[Embodiment 1-2] An example of the embodiment will be described below in accordance with the procedures shown in FIGS. (1) As shown in FIG. 3, a steel tubular joint is welded to one end of a steel tubular first columnar body 1 to provide an inner pillar 11 in advance, and a steel tubular tubular body is provided. A steel tubular joint is welded to one end of the second columnar body to provide an outer tube portion 21, and an outer peripheral surface of the inner column portion 11 is provided with an annular outer groove portion 12. An annular inner groove portion 22 is provided on the inner peripheral surface, and the outer tube portion 21 is provided with a through hole 4 communicating with the inside and outside of the inner groove portion 22. A C-ring 31 made of a spring material, which is larger than the diameter of the entrance and whose outer diameter is smaller than the diameter of the groove bottom of the inner groove 22, is prepared. A mating portion 31a is provided, and the engaging portions 31a are engaged with the engaging portions 31a. The person 31a is held closer to the C-ring 31 than in the natural state,
A connection member 61 for changing the diameter of the connection member to a reduced diameter state is prepared. (2) The C-ring 31 is provided in the inner groove 22 and the opening 3 of the C-ring 31 is formed in the through hole 4.
It is arranged in a large diameter state so that 1a faces. (3) The inner column portion 11 is fitted into the outer tube portion 21, and the inner groove portion 22 and the outer groove portion 12 are arranged in a posture facing each other (see FIGS. 3 (b) and 4 (a)). (4) The diameter of the C-ring 31 is reduced from the through hole 4 to attach the connecting member 61 between the two engaging recesses, and the diameter of the C-ring 31 is reduced.
And the outer tube portion 21 is held in an engaged state. (FIG. 3
(C), FIG. 4 (B)) As a result, the first columnar body 1 and the second columnar body 2 are in a state of being connected to each other via the C ring 31 in an engaged state.

[Embodiment 1-3] An example of an embodiment will be described below in accordance with the procedures shown in FIGS. (1) As shown in FIG. 5 (a), a steel tubular joint is welded to one end of a steel tubular first columnar body 1 to provide an inner pillar 11 in advance, and a steel tubular joint is provided. And a steel tubular joint is welded to one end of the tubular second columnar body to form an outer tubular portion 2.
1 is provided on the outer peripheral surface of the inner pillar 11.
2 and an annular inner groove 22 provided on the inner peripheral surface of the outer tube 21, and the inner diameter is smaller than the diameter of the entrance of the outer groove 12 in a natural state, and the outer diameter is A C-ring 31 made of a spring material and having a diameter larger than the diameter of the entrance of the inner groove 22 is prepared. The inner groove 2
2 is formed to be larger than the width of the C-ring 31, and the depth of the outer groove 12 is formed to be smaller than the width of the C-ring 31. Further, a tapered end 1a is formed at an outer edge of the inner column 11, and the inner column 11 is connected to the outer tube while the C-ring 31 is engaged with the inner groove 22. The C-ring 31 is formed so as to be able to come into contact with the tapered end 1a when fitted into the portion 21. (2) Insert the C-ring 31 into the inner groove 22,
The C ring 31 is arranged so that its diameter can be changed. (See FIG. 6) (3) The inner column 11 is fitted into the outer tube 21. At this time, the diameter of the C ring 31 is increased by the tapered end 1a of the outer edge of the inner column 11 so that the C ring 31 is expanded. The ring 31 can be overcome. (FIG. 5
(Refer to (b) to (c).) (4) When the C-ring 31 is passed over the outer edge of the inner pillar 11, the inner pillar 11 is further slidably fitted to the inner groove 22 and the inner groove 22. The outer groove portion 12 is disposed in a posture facing the outer groove portion 12. At this time, the C ring 3
1 is released from the diameter-increasing action received from the tapered end 1a of the front inner column portion 11, so that the diameter is reduced and the natural state is restored, and the space between the outer groove portion 12 and the inner groove portion 22 is extended. The state is interposed (see FIG. 5C).
Thereby, the first columnar body 1 and the second columnar body 2 are brought into a state of being connected to each other via the C-ring 31.

[Embodiment 1-4] An example of an embodiment will be described below in accordance with the procedures shown in FIGS. (1) As shown in FIG. 7A, a steel tubular joint is welded to one end of a steel tubular first columnar body 1 to provide an inner pillar 11 in advance, and the steel tubular joint is provided. And a steel tubular joint is welded to one end of the tubular second columnar body to form an outer tubular portion 2.
1 is provided on the outer peripheral surface of the inner pillar 11.
2 and an annular inner groove portion 22 is provided on the inner peripheral surface of the outer tube portion 21, and the outer tube portion 21 is formed with a through hole 4 communicating with the inside and outside of the inner groove portion 22 at 90 degrees in the circumferential direction. The inner diameter is smaller than the diameter of the entrance of the inner groove part 22 in the natural state, and the outer diameter is larger than the diameter of the entrance of the inner groove part 22 in the circumferential direction. A split ring 32 having a split shape is prepared. The depth of the inner groove portion 22 is formed larger than the width of the split ring 32, and the depth of the outer groove portion 12 is formed smaller than the width of the C ring 31. . 7 and 8, the inner column portion 11 and the outer tube portion 21 have a tapered two-stage fitting surface.
Outer and inner grooves 12 and 22 are provided at each step of the fitting surface. Further, the through hole 4 is provided with a screw groove into which the bolt 52 can be screwed. (2) The split ring 32 is inserted into the inner groove 22, and the split ring 32 is arranged in a large-diameter state where the diameter can be changed. (3) The inner column portion 11 is fitted into the outer tube portion 21, and the inner groove portion 22 and the outer groove portion 12 are arranged in a facing position (see FIGS. 7 (b) and 8 (a)). (4) By screwing the bolt 52 through the through hole 4, the tip of the bolt 52 is brought into contact with the split ring 32, and further penetrates into the outer groove 12, and the split ring 32 is reduced in diameter. The split ring 32 is held in the engaged state. (See FIG. 7 (C) and FIG. 8 (B).) As a result, the first columnar body 1 and the second columnar body 2 are connected to each other via the C ring 31 in an engaged state.

[Embodiment 2] As shown in FIGS. 9 to 15, the connecting structure of a columnar body of the present invention is a steel tubular joint at one end of a tubular first columnar body 1. The inner pillar portion 11 is provided by welding, and the outer tubular portion 21 is provided by welding a steel tubular joint portion to one end of a steel tubular second pillar body, and the outer peripheral surface of the inner pillar portion 11 is provided. In addition to providing an annular outer groove portion 12 at the same time, an annular inner groove portion 22 is provided on the inner peripheral surface of the outer tube portion 21, and the inner column portion 11 is fitted into the outer tube portion 21 to be connected, and the diameter can be freely changed. The outer groove 12
A ring-shaped member 3 that can be accommodated in a state of being retracted to the back from the entrance is inserted between both the outer groove 12 and the inner groove 22 in a state where the inner column 11 is fitted into the outer tube 21. And both are held in an engaged state.

The outer tube portion 21 is provided with a through hole 4 communicating with the inside and outside of the inner groove portion 22 to form an operation portion for changing the diameter of the ring-shaped member 3. Further, the steel forming the joint portion is configured to have higher strength than the steel forming the first and second columnar bodies 1 and 2.

The connection structure of such a columnar body is formed as follows. [Embodiment 2-1] An example of an embodiment will be described below in accordance with the procedures shown in FIGS. (1) As shown in FIG. 9A, a steel tubular joint is welded to one end of a steel tubular first columnar body 1 in advance to provide an inner pillar 11 and a steel tubular joint is provided. And a steel tubular joint is welded to one end of the tubular second columnar body to form an outer tubular portion 2.
1 is provided on the outer peripheral surface of the inner pillar 11.
2, an annular inner groove portion 22 is provided on the inner peripheral surface of the outer tube portion 21, and the outer tube portion 21 is provided with a through hole 4 communicating with the inside and the outside of the inner groove portion 22, and A C-ring 31 made of a spring material having an inner diameter that is larger than the diameter of the groove bottom of the outer groove 12 in its natural state and smaller than the diameter of the entrance of the outer groove 12, and the C-ring 31. Is longer than the opening 31a of
When fitted into the opening 31a of the ring 31, the C
A spacer 51 large enough to push the inner diameter of the ring 31 larger than the diameter of the entrance of the inner groove 22 is prepared. In addition, the depth of the outer groove 12 is formed to be larger than the width of the C-ring 31, and the depth of the inner groove 22 is formed to be smaller than the width of the C-ring 31. . (2) Insert the C-ring 31 into the outer groove 12 to reduce the diameter. (3) The inner column portion 11 is fitted into the outer tube portion 21, and the inner groove portion 22 and the outer groove portion 12 are arranged so as to face each other. The through hole 4 is disposed at a position facing the opening 31a of the C-ring 31 (FIG. 9B).
FIG. 10 (a)). (4) The diameter of the C ring 31 is expanded from the through hole 4 and the spacer 51 is inserted into the opening 31a.
Is interposed between both the outer groove 12 and the inner groove 22 and both are held in an engaged state. (See FIG. 9 (C) and FIG. 10 (B)). Thereby, the first columnar body 1 and the second columnar body 2 are brought into a state of being connected to each other via the C-ring 31.

[Embodiment 2-2] Hereinafter, FIGS.
An example of the embodiment will be described according to the procedure shown in FIG. (1) As shown in FIG. 11A, a steel tubular joint is welded to one end of a steel tubular first columnar body 1 to provide an inner pillar 11 in advance, and the steel tubular joint is provided. A tubular joint made of steel is welded to one end of the tubular second columnar body to provide an outer tube portion 21, an outer peripheral surface of the inner column portion 11 is provided with an annular outer groove portion 12, and An annular inner groove portion 22 is provided on the inner peripheral surface of the portion 21, and the outer tube portion 21 has
The inner groove 22 having a through hole 4 communicating with the inside and the outside, and the inner diameter is smaller than the diameter of the entrance of the outer groove 12 in the natural state, and the outer diameter is larger than the diameter of the entrance of the inner groove 22. A large C-ring 31 made of a spring material, and engaging recesses 31 at both ends of the C-ring 31, respectively.
b, the two engagement recesses 31b are engaged with each other to hold the engagement recesses 31b closer to each other than when the C ring 31 is in a natural state, and the C ring 31 is reduced in diameter to a reduced diameter state. A connecting member 61 made of a thermoplastic resin to be changed is prepared. (2) The C-ring 31 is housed in the outer groove 12 and the engaging recesses 31 b at both ends of the C-ring 31.
The connecting member 61 is attached to the first member and is arranged in a small diameter state. (3) The inner column portion 11 is fitted into the outer tube portion 21, and the inner groove portion 22 and the outer groove portion 12 are arranged so as to face each other. Further, the through-hole 4 is disposed at a position facing the opening 31a of the C-ring 31 (FIG. 11).
(B) and FIG. 12 (a)). (4) The connection member 61 is heated and melted from the through hole 4 to release the small diameter state of the C ring 31 to bring the C ring 31 into a natural state, and the inner column portion 11 and the outer tube portion 21 are released. 11 is held in an engaged state (see FIG. 11).
(C), see FIG. 12 (b)). Thereby, the first columnar body 1 and the second columnar body 2 are brought into a state of being connected to each other via the C-ring 31.

[Embodiment 2-3] An example of the embodiment will be described below according to the procedure shown in FIG. (1) As shown in FIG. 13A, a steel tubular joint is welded to one end of a steel tubular first columnar body 1 to provide an inner pillar 11 in advance, and the steel tubular joint is provided. A tubular joint made of steel is welded to one end of the tubular second columnar body to provide an outer tube portion 21, an outer peripheral surface of the inner column portion 11 is provided with an annular outer groove portion 12, and An annular inner groove 22 provided on the inner peripheral surface of the portion 21; and an inner diameter smaller than the diameter of the entrance of the outer groove 12 in a natural state, and the outer diameter is smaller than the diameter of the entrance of the inner groove 22. A large C-ring 31 made of a spring material is prepared. In addition, the depth of the outer groove 12 is formed to be larger than the width of the C-ring 31, and the depth of the inner groove 22 is formed to be smaller than the width of the C-ring 31. . Further, a tapered end 2a is formed at the inner edge of the outer tube 21. (2) Insert the C-ring 31 into the outer groove 12,
The C ring 31 is arranged so that its diameter can be changed. (3) The inner column 11 is fitted into the outer tube 21. At this time, the diameter of the C-ring 31 is reduced by the tapered end 2a of the inner edge of the outer tube 21 so that the inner edge of the outer tube 21 can ride over the C-ring 31. Can be (See FIGS. 13B to 13C.) (4) When the C-ring 31 is passed over the inner edge of the outer tube 21, the outer tube 21 is further slidably fitted to the inner groove. 22 and the outer groove portion 12 are arranged in a posture facing each other. At this time, the C ring 3
1 is released from the diameter-reducing action received from the tapered end portion 2a of the front outer tube portion 21, so that the diameter of the outer groove portion 12 is restored to a natural state, and the space between the outer groove portion 12 and the inner groove portion 22 is extended. Become intervening. Thereby, the first columnar body 1 and the second columnar body 2 are brought into a state of being connected to each other via the C-ring 31.

[Embodiment 2-4] FIGS.
An example of the embodiment will be described according to the procedure shown in FIG. (1) As shown in FIG. 14A, a steel tubular joint is welded to one end of a steel tubular first columnar body 1 to provide an inner pillar 11 in advance, and the steel tubular joint is provided. A tubular joint made of steel is welded to one end of the tubular second columnar body to provide an outer tube portion 21, an outer peripheral surface of the inner column portion 11 is provided with an annular outer groove portion 12, and An annular inner groove portion 22 is provided on the inner peripheral surface of the portion 21, and the outer tube portion 21 has
A structure in which four through holes 4 communicating with the inside and outside in the inner groove portion 22 are provided at four positions shifted by 90 degrees in the circumferential direction, and
A split ring 32 having a shape in which the inner diameter is smaller than the diameter of the entrance of the outer groove portion 12 in the natural state and the outer diameter is larger than the diameter of the entrance of the inner groove portion 22 in the circumferential direction and is divided into four in a natural state is prepared. The depth of the outer groove portion 12 is formed larger than the width of the split ring 32, and the depth of the inner groove portion 22 is formed smaller than the width of the C ring 31. . The through-hole 4 is provided with a screw-in groove into which a bolt 62 can be screwed, and the split ring 32 is arranged in the outer groove portion 12 so that the inner column portion 11 and the outer tube portion 21 are fitted. A threaded groove into which the bolt can be screwed is also provided at a position of the split ring 32 facing the through hole 4 when the split ring 32 is made. (2) The split ring 32 is inserted into the outer groove 12, and the split ring 32 is arranged in a small diameter state where the diameter can be changed. (3) The inner column portion 11 is fitted into the outer tube portion 21, and the inner groove portion 22 and the outer groove portion 12 are arranged so as to face each other. (See FIG. 14B.) (4) By screwing the bolt 62 through the through hole 4, the tip end of the bolt comes into contact with the split ring 32 and further enters the threaded groove of the split ring 32 ( FIG.
(See (a)), when the split ring 32 is pulled toward the inner groove portion 22 by a screwing operation and is operated to increase the diameter, the split ring 32 is held in an engaged state between the inner groove portion and the outer groove portion ( FIG. 15 (b)). As a result, the first columnar body 1 and the second columnar body are brought into a state of being connected to each other via the C-ring 31 (see FIGS. 14C and 15B).

[Another Embodiment] Another embodiment will be described below. As the ring-shaped member 3 interposed between the first columnar body 1 and the second columnar body, a C ring 31 or a split ring 3
Not limited to the shape 2, the C-ring 31 may be provided with engaging portions at both ends thereof that are freely engageable with each other, and formed into an O-ring shape whose diameter can be changed (see FIG. 16A). And these are collectively referred to as a ring-shaped member 3. Further, the through-hole 4 for performing the diameter changing operation of the C-ring 31 and the retracting operation of the split ring 32 is not always necessary. For example, the spacer 51 is heated and melted as in Embodiment 1-1. In such a case, in particular, the through hole 4
Since there is no need to heat from the outside, the outer tube 21 may be heated together, or the inner column 11 and the outer tube 2 may be heated.
From the fitting margin with 1, a heating wire for heating and melting the spacer 51 is drawn out and connected, the heating and melting operation is performed from the heating wire, and the diameter change operation of the C ring 31 is performed. good. When the diameter changing operation is performed separately from the fitting of the inner column portion 11 and the outer tube portion 21 as described above, the through hole 4 and the heating wire are collectively referred to as an operation portion A. Also, instead of the spacer 51, when the C-ring 31 is inserted into the opening 31a of the C-ring 31, the C-ring 31 is expanded, and a bolt is provided so that the interposition can be released from the operation section A. (See FIG. 22), and the collectively referred to as the enlarged-diameter state holding portion 5 including the engaging portion and the like exemplified in the O-ring shape. Conversely, the diameter of the connection member 61 and the diameter-reduced state holding portion 6 including the engagement portion illustrated in the O-ring shape are collectively referred to. As shown in FIGS. 16 (b) and 16 (c), the expanded-diameter state holding section 5 and the reduced-diameter state holding section 6 are formed from connecting members or spacers of various shapes which can freely connect both ends of the ring-shaped member 3. You may employ what is comprised. Further, a plurality of the inner groove portions 22 and the outer groove portions 12 may be provided in a single columnar connection structure. At this time,
In order to consider a mode corresponding to the above-mentioned Embodiments 1-3 and 2-3, for example, the outer groove 12 is formed by the inner column 11.
The inner groove 22 is formed to be narrower toward the distal end of the outer tube 21, and the inner groove 22 is formed to be wider toward the distal end of the outer tube 21.
2 are formed so as to be opposed to each other, and each of the inner groove portions 22 is formed into a ring-shaped member 3 corresponding to its groove width.
It is only necessary to be formed to a depth that can accommodate the. In such a case, the ring-shaped member 3 housed in the wide inner groove portion 22
Moves over the narrow outer groove portion 12 and widen the outer groove portion 12.
And the narrow outer groove 12 reaches the narrow inner groove 22 without engagement of the ring-shaped member 33 accommodated in the wide inner groove 22, and the corresponding inner groove 22 and Each of the outer grooves 12 holds the corresponding ring-shaped member 33 in the engaged state, so that a strong and reliable engagement structure can be provided. Such a configuration can be applied to the case where the roles of the inner groove 11 and the outer groove 12 are reversed. Furthermore, the inner pillar 11
The method of forming the outer tube portion 21 and the outer tube portion 21 is not limited to welding.
And the outer tube 21 may be formed directly. If there is a problem in strength, that portion may be quenched and strengthened. As shown in FIG. 17, a configuration may be adopted in which the intermediate pipes 7 each having a pair of inner pillars 11 that can be inserted into both of the pair of outer pipes 21 are provided and connected to each other. It is also possible to adopt a configuration in which a joint pipe that can be fitted is provided on both of the pair of inner pillars 11 and connected to each other.
It is preferable that the outer surface after the connection structure of the columnar body is formed to be a flat surface. However, the present invention prevents the outer surface after the formation of the connection structure of the columnar body from becoming uneven. is not. Further, of the contact surfaces between the inner column portion 11 and the outer tube portion 21 in the columnar body connection structure, the inner column portion 1
1 and the inner peripheral surface of the outer tube 21 are respectively
It may be formed on the tapered surface 11a which becomes thinner toward the distal end (see FIG. 19), and increases the watertightness on the contact surface between the distal end of the outer tube 21 and the proximal end of the inner column 11. A spacer may be interposed to prevent rattling or rattling (see FIG. 18). This spacer has
Rubber, resin, metal plate and the like can be adopted. Also,
As shown in FIG. 19, such a contact surface may be formed in a shape that fits into and out of concave and convex portions, so that a stronger engagement structure can be exhibited. The thickness of the ring-shaped member 3 may be formed slightly smaller than the width of the outer groove 12 (see FIG. 20), and the connection structure of the columnar members as a whole is easily bent and deformed. The inner groove 22
May be formed in a tapered corner portion 12d that becomes wider toward the entrance (see FIG. 21), and the inner groove portion 22d may be formed. And the outer groove 12 are opposed to each other,
By press-fitting the ring-shaped member 3 into the groove while pressing the ring-shaped member 3 against the tapered corner portion, the press-fit of the ring-shaped member 3 can be converted into a pressure contact force between the columnar members, They can be connected in a state where they are pressed against each other. Therefore, the columnar bodies can be connected to each other in a state in which the columnar bodies are hard to rattle.

In the embodiment 1-1, the grooves 12,
Although a filler a is filled between the ring member 22 and the ring-shaped member 3 to prevent rattling, it is not particularly essential if the ring-shaped member 3 has sufficient reliability. 1
-2 The following configuration may be used. If the curable filler a is used, it is possible to prevent rattling of the ring-shaped member 3, and if the strength after curing is sufficient, the ring-shaped member 3 may be used for reinforcing the connection structure of the columnar body. Can be done. Further, it is also possible to improve the airtightness and corrosion resistance and improve the durability by filling a rust inhibitor or a water tightness retaining agent as the filler a.

Also, in the embodiments 1-3 and 2-3, the through holes 4 are not necessarily required, but may be any case in which the above-mentioned filler a is filled. In the case where the filler a is not required, it is preferable not to provide the through-hole from the viewpoint of the strength of the columnar body.

Incidentally, what is called the inner column portion and the outer tube portion according to the present invention may be connected to the first columnar member, as long as the other is connected to the second columnar member. Is referred to as “distributed and provided”.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is a process chart showing a method of connecting a columnar body.

FIG. 2 is an explanatory view of a state of a ring-shaped member in a connection structure of a columnar body.

FIG. 3 is a process chart showing a method of connecting a columnar body.

FIG. 4 is an explanatory diagram of a state of a ring-shaped member in a connection structure of a columnar body.

FIG. 5 is a process chart showing a method of connecting a columnar body.

FIG. 6 is an explanatory view of a state of a ring-shaped member in a connection structure of a columnar body.

FIG. 7 is a process chart showing a method of connecting a columnar body.

FIG. 8 is an explanatory view of a state of a ring-shaped member in a connection structure of a columnar body.

FIG. 9 is a process chart showing a method of connecting a columnar body.

FIG. 10 is an explanatory view of a state of a ring-shaped member in a connection structure of a columnar body.

FIG. 11 is a process chart showing a method of connecting a columnar body.

FIG. 12 is an explanatory diagram of a state of a ring-shaped member in a connection structure of a columnar body.

FIG. 13 is a process chart showing a method of connecting a columnar body.

FIG. 14 is a process chart showing a method of connecting columnar bodies.

FIG. 15 is an explanatory diagram of a state of a ring-shaped member in a connection structure of a columnar body.

FIG. 16 is an explanatory view of a main part of another embodiment.

FIG. 17 is an explanatory view of a main part of another embodiment.

FIG. 18 is an explanatory view of a main part of another embodiment.

FIG. 19 is an explanatory view of a main part of another embodiment.

FIG. 20 is an explanatory view of a main part of another embodiment.

FIG. 21 is an explanatory view of a main part of another embodiment.

FIG. 22 is an explanatory view of a main part of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st pillar-shaped body 2 2nd pillar-shaped body 11 inner pillar part 21 outer tube part 12 outer groove part 22 inner groove part 3 ring-shaped member

Claims (2)

[Claims] 1. A columnar body provided with an inner column (11) and an outer tube (21) distributed at both ends, wherein the inner column (11) and the outer tube (21) are provided. The inner column (11) is provided with at least one annular outer groove (12) on the outer peripheral surface of the inner column (11) and the outer tube (2).
At least one annular inner groove portion (22) is provided on the inner peripheral surface of the outer groove portion (1).
2) Alternatively, the inner column (11) is formed so as to be accommodated in a state of being retreated to the back from the entrance of the inner groove (22), and the inner column (11) is formed of a different column-shaped outer tube (2).
When the ring-shaped member (3) is fitted in 1), the outer groove portion (12) and the inner groove portion (22) of the columnar body different from the outer groove portion (12).
The outer groove (12) or the inner groove (22) so as to be interposed between them and to be held in an engaged state.
And attaching the ring-shaped member (3) to a side capable of accommodating the ring-shaped member (3), and attaching the ring-shaped member (3) to at least one of an outer edge of the inner pillar portion and an inner edge of the outer tube portion. ) That can be freely contacted with the tapered ends (1a), (2)
Columns forming a). 2. An inner column (11) and an outer tube (2) are provided at one end of the first column (1) and one end of the second column (2).
1), and the inner pillar (11) and the outer pipe (21) are connected to each other in a columnar structure, wherein the inner pillar (11) has an annular outer surface. Groove (12)
And at least one of the outer tube portions
At least one annular inner groove portion (22) is provided on the inner peripheral surface of (21) so that the diameter thereof can be elastically changed, and the inner groove portion (22) is retracted deep from the entrance of the outer groove portion (12) or the inner groove portion (22). A ring-shaped member (3) that can be accommodated is provided, and at least one of an outer edge of the inner pillar portion and an inner edge of the outer tube portion can be brought into contact with the ring-shaped member (3). With the tapered ends (1a) and (2a) formed, and the inner pillar (11) fitted into the outer tube (21), the ring-shaped member (3) is inserted into the outer groove.
A connection structure of a columnar body interposed between both (12) and the inner groove portion (22) and held in an engaged state therebetween.