JP2003254308A - Positioning and fixing support structure for fitting tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning / fixing support structure of a fitting tube which has excellent workability, is easy to attach, and does not move or loosen. SOLUTION: This is a support structure for positioning and fixing a tubular body by inserting a bolt into a through hole provided so as to be orthogonal to and penetrating a fitting portion and fastening with a nut. A half-tubular sleeve member having an outer peripheral contact surface that closely matches with and having an inclined surface reduced in diameter from the inner peripheral edges at both ends is inserted and fitted so as to extend over the through-hole,
A frusto-conical tubular boss member provided on the outer peripheral surface with an inclined surface for expanding the sleeve member while slidingly contacting the inclined surface of the half-tubular sleeve member is inserted from both ends of the through-hole, facing each other, and a bolt is inserted. The outer peripheral contact surface of the sleeve member is pressed against the hole wall of the through-hole through the boss member and fixedly supported by the insertion nut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for positioning and supporting a fitting pipe body used for a pipe joint portion, a sleeve joint portion and the like.

[0002]

2. Description of the Related Art A structure for connecting pipes to each other includes a structure for connecting pipes facing each other by welding, and a flange joint is provided for pipes facing each other so that the flanges are screwed to each other by bolts, nuts or the like. There are a structure for connecting by means of, a structure for connecting by means of a screw member by cutting a screw for connecting the opposed pipes.

Further, regarding a structure in which inner and outer tubular bodies having different diameters are inserted and fixedly supported, a common through hole is provided so as to penetrate in a state orthogonal to the axial center of the inner and outer tubular bodies, and is screwed into the through hole. There is a structure in which a member is inserted to position and fix the inner tube. A conventional example of a fixed support structure in which a screw member is used for the pipe having the inner and outer pipe fitting structure will be described with reference to FIG. In the illustrated example, the through holes 103, 103 are provided at two locations located in parallel.
Is shown and is fixed by a screwing member. The fixed support structure for connecting the inner and outer pipes by providing a screwing member has a structure in which the inner pipe 102 is inserted into the outer pipe 101. The inner pipe 102 penetrates both the outer pipe 101 and the inner pipe 102 and has a through hole 103a of the same size. , 103b are provided. This through hole 103
a long bolt 104 with a loose fitting shape by matching a and 103b
Is inserted, the washer 105 is inserted, and the nut 106 tightens and fixes.

[0004]

The above-mentioned structure in which opposed pipes are connected by welding has high joint strength, but welding distortion occurs and twist occurs, and it is difficult to align the axial centers of the pipes, and product accuracy is improved. It was difficult to secure. Further, since welding is performed on site, a pedestal and jigs for welding are required, which is complicated, requires skill, and has restrictions and difficulties in workability. In the structure in which the flange joints provided on the opposed pipes are connected by the screw member, the flange member and the pipe material are connected by welding in advance, so the flange surface is accurately orthogonal to the pipe axis due to deformation due to welding distortion. It was difficult to do, required special skills, was laborious and costly. Also, the structure in which the above-mentioned pipe is threaded and screwed together is suitable only for thick pipes to some extent, and the process of threading the pipe is complicated, and it is applied to parts where high strength is required. I couldn't. In addition, since it requires a large amount of manufacturing and mounting, the structure is not suitable for a large diameter pipe.

Further, in the structure in which a through hole is provided in the inner-outer pipe fitting structure shown in FIG. 9 and fixed by a screw member, the inner pipe 102 is fixed because there is a gap between the outer pipe 101 and the inner pipe 102. It was easy to move. Also, the outer pipe 101 and the inner pipe 1
02 through holes 103a, 103b
Although the bolt 104 was inserted through the inner tube 102, a gap was created between the through hole and the bolt, and the inner tube 102 was not fixed and was in a moving state. Further, even if the bolt 104 is interposed with the washer 105 and tightened with the nut 106, the screw member and the outer pipe 101
There was a concern that it would loosen because the contact area with and the fixing strength was weak. When this fixed support structure by fitting the inner and outer pipes is used for a general-purpose pipe joint part, for example, a pillar, a pole, or a pipe stand, it becomes unstable due to the gap between the inner and outer pipes, or the screwing member is used. There were times when it became loose. Further, for example, the fixed portion of the deck post that supports the floating roof deck of the floating roof storage tank on the bottom plate has a fixed support structure by this fitting, that is, a sleeve pipe structure,
Since there is a gap between the outer tube and the inner tube, or between the through hole and the bolt, the inner tube is not fixed, but the connection part becomes loose due to the introduction and withdrawal of liquid or agitation, causing distortion. It sometimes became stable, or the inner tube vibrated, causing abnormal noise.

Further, the fixed support structure shown in FIG.
Since the bolts 104 and the nuts 106 project outward from the outer tube 101, the bolts 104 and the nuts 106 are caught, and the structure is inferior in appearance, so that a flat structure without protrusions may be required in some cases. Then, when the connection structure of the flange joint or the fixed support structure by fitting of the inner and outer pipes is used for a general-purpose pipe connection part such as a handrail, a fence or a fence, it is caught or hindered. In addition, for example, when it is used for a camera mount of a cosmic ray telescope, there is a case where diffuse projection of cosmic rays is caused by projections of the camera mount connection portion, which may hinder observation.

The object of the present invention has been made in view of the above-mentioned problems of the prior art. It has excellent workability on site, is easy to install, and does not move or loosen. The present invention provides a positioning and fixing support structure.

[0008]

In the positioning and fixing support structure for a fitting pipe body according to the present invention, an end portion of a small-diameter pipe body is loosely fitted into an end portion of a large-diameter pipe body, and With a support structure that inserts a bolt into a through hole provided so as to penetrate through the pipe body of the fitting portion at right angles to the fitting portion of the pipe body and tightens it with a nut to position and fix the small diameter pipe body. There is an outer peripheral contact surface that closely matches the hole wall of the through hole when expanding outward,
Also, a half-tubular sleeve member having an inclined surface whose diameter decreases from the inner peripheral edges of both ends is inserted into the through hole so as to extend over the through hole, and slidably contacts the inclined surface of the half-tubular sleeve member. Meanwhile, a truncated conical tubular boss member having an inclined surface for expanding the sleeve member on the outer peripheral surface is made to face each other, and the tip portions thereof are inserted from both end sides of the through hole, and the bolt is attached to the facing boss member. It is inserted and tightened with a nut, and the outer peripheral abutting surface of the sleeve member is pressed against the hole wall of the through hole via the boss member, so that the tubular body of the small diameter is positioned at the position of the through hole. It is fixedly supported on the tubular body.

Further, the opposing truncated-cone tubular boss members are formed such that one of them is a tapered bolt having a head member of a bolt having an inclination, and the other is a tapered nut having an inclination of a nut member, and The maximum diameter of the taper bolt and the taper nut is set to be equal to or smaller than the size of the through hole.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a positioning and fixing support structure for a fitting pipe body according to the present invention will be described with reference to FIGS. FIG. 1 is an example of a fixed support portion for mutual tubular bodies, (a) is a front sectional view in which a part is cut away, (b) is a side view, and FIG. 2 shows a part of FIG. 1 (a). It is sectional drawing which expands and shows. FIG. 3 is an explanatory view of a sleeve member used for the fixed support portion, (a) is a side view in a half-divided state, and (b) is a front view. FIG. 4 is an explanatory view of a boss member used for the fixed support portion, and FIG. 4A is a side view and FIG. 4B is a front cross-sectional view of two opposed boss members.

1 (a) and 1 (b) are formed in a fitting structure in which the pipes 1 and 2 are fitted in a loose fit, and the pipes 1 and 1 of the fitting portion are formed.
2 shows through holes 3 and 3 facing each other so as to penetrate through 2 and fixing using two screw fastening members. FIG. 2 shows an enlarged cross section of this screw fastening portion at one place. ing. Reference numeral 1 is an outer tube body made of a large-diameter tube body, 2 is an inner tube body made of a small-diameter tube body, and 3 is a through hole having the same diameter dimension common to the outer tube body 1 and the inner tube body 2. Reference numeral 4 denotes a bolt which is inserted into the through hole 3, 5, 5a and 5b are two half-split tubular sleeve members provided inside the through hole 3, 6 is a nut for tightening the bolt 3, and 7 and 7a and 7b are the bolt 4 and the nut. 6 is a boss member that is interposed between the two.

The end portion of the inner pipe body 2 is inserted into the end portion of the outer pipe body 1 in a loosely fitting manner, and the pipe bodies 1 and 2 are formed so as to penetrate through the pipe body 1 and 2 at right angles to the both fitting portions. Two half sleeve-shaped sleeve members 5a and 5b are fitted so that the holes 3 are aligned and the common through holes 3 are provided. Then, the boss members 7a and 7b are opposed to each other from both ends of the sleeve members 5a and 5b, the slanted surfaces 9 and 10 are slidably contacted with each other, and then the bolt 4 is inserted into the boss members 7a and 7b. When tightened with the nut 6, the sleeve members 5a and 5b expand outwardly via the boss members 7a and 7b and press-contact with the hole walls of the inner tube and the outer tube, respectively, and the inner tube body 2 and the outer tube are located at the positions of the through holes 3. The body 1 is connected and fixed so as not to move.

As shown in FIGS. 2 and 3, the half-split tubular sleeve members 5a and 5b are formed in the outer pipe through hole 3a hole wall and the inner pipe through hole 3b hole wall of the through hole 3 which is orthogonal to and common to each other. An abutting surface 8 having an outer peripheral diameter dimension that closely matches when expanding outward is provided, and inclined surfaces 9 and 9 having a reduced diameter toward the center of the pipe are provided near the inner peripheral edges of both ends.

The boss members 7a and 7b, which are provided to face each other, are
As shown in FIGS. 2 and 4, an inclined surface 10 is provided on the outer periphery so as to be in surface contact with the inclined angle of the inclined surface 9 so as to expand the sleeve members 5a, 5b in the form of a half. Is formed as a frustoconical tubular member having a pushing contact surface 11 with which a bolt or nut contacts.

The half-tubular sleeve members 5a, 5b.
Is manufactured by cutting the outer peripheral contact surface 8 and the inner peripheral inclined surface 9 using a steel pipe material, round bar material, or the like, and further dividing the surface into two parts. The truncated conical tubular boss members 7a and 7b are made of a round rod or the like, and are used to machine the inner diameter into which the bolt 4 is inserted and the outer peripheral inclined surface 10 to be machined. Alternatively, it is possible to use a pipe material having a thick wall diameter and perform cutting. Further, when a large number of members of the same size are manufactured, a casting product can reduce the manufacturing cost.

The fitting pipes 1 and 2 are sized so that the clearance is loosely fitted on one side of about 0.2 to 5 mm.
The thickness of the tube wall is set to about 2 to 10 millimeters corresponding to the diameter of the tubes 1 and 2. Further, the size of the through hole 3 is determined in consideration of the strength of the fixed support portion without causing the strength of the tubular bodies 1 and 2 to decrease. The sleeve member 5 and the boss member 7 are formed to have a length and a thickness that match the diameter of the pipe through hole 3 and the degree of inclination of the inclined surface 9 of the sleeve member 5 and the inclined surface 10 of the boss member 7. Can be smoothly slid at an inclination angle of 5 to 30 degrees, and in the embodiment, the inclination angle 11 is about 2 in the direction orthogonal to the length 10 in the axial direction of the through hole 3. Formed 3 times.

As shown in FIG. 2 and described above, the sleeve members 5a and 5b in the form of half-tubes are inserted and fitted into the through holes 3 of the pipes 1 and 2 which are inserted and matched with each other. The tip end of each of the conical tubular boss members 7a and 7b is connected to the sleeve member 5.
The bolts 4 are inserted into the boss members 7a and 7b so that the bolts 4 are inserted into the boss members 7a and 7b so as to face each other. Then nut 6
And tighten the boss members 7a and 7b with the sleeve member 5
The sleeves 5a, 5b are pushed inward from both ends, and the slanted surfaces 10 of the boss members 7a, 7b are brought into contact with the slanted surfaces 9 of the sleeve members 5a, 5b in the form of half-tubes so that the sleeves are slidably contacted with each other. The members 5a and 5b are expanded outwardly, and the sleeve member 5 is attached to the hole walls of the through holes 3a and 3b of the tubular bodies 1 and 2.
The contact surfaces 8 of a and 5b are brought into close contact with each other. As described above, the sleeve members 5a, 5b and the boss members 7a, 7b are matched with the through holes 3a, 3b without any play, the axial center alignment and the positioning are facilitated, the assembling work can be performed with high accuracy, and the displacement may occur. Can be fixed without sagging.

An embodiment of the positioning and fixing support structure for the fitting pipe body according to the second invention will be described with reference to FIGS. 5 and 6. As shown in FIG. 5, the inner tubular body 2 is inserted into the outer tubular body 1, the sleeve members 5 and 5 are inserted into the common through holes 3 of the same size, and the taper bolt 12 having a screwing structure is inserted and tapered. Tighten the nut 13 so that both tips do not protrude outside the surface of the tube.

As shown in FIGS. 5 and 6, one of the opposing truncated conical tubular boss members 7a, 7b is formed in a tapered bolt 12 having an inclined surface on the outer surface of the bolt head 12a. On the other hand, the outer surface of the nut member is formed as a taper nut 13, and the taper bolt 12 and the taper nut 13 are manufactured in a screwed structure. Further, the maximum diameter dimension of the taper bolt 12 and the taper nut 13 is made smaller than the inner diameter dimension of the through hole 3. A hexagonal bolt holding groove 14 is provided on the bolt head 12a of the taper bolt 12, and a hexagonal nut tightening groove 15 is provided on the outer side of the taper nut 13 so that both can be tightened. . The taper bolt 12 and the taper nut 13 are manufactured by cutting using a ready-made bolt / nut member or by cutting a round bar.
In this way, the taper bolt 12 and the taper nut 13
The fixed support structure in which the maximum diameter is less than or equal to the dimension of the through hole 3 does not project outside from the outer surfaces of the tubular bodies 1 and 2 and thus does not get caught and has an excellent appearance. Becomes

The positioning and fixing support structure of the fitting pipe body according to the first aspect of the present invention shown in FIG. 2 is easy to assemble, such as columns, poles, pipe mounts, etc., and is securely connected without slipping or loosening. The structure is suitable for fixing. An example in which the fixed support structure of the pipe body is applied to the fixed portion 20 of the sleeve structure of the deck post 24 supporting the floating roof deck 23 of the floating roof storage tank will be described with reference to FIG. 7. Note that FIG. 7 shows a state in which the floating roof deck 23 is lowered and is supported on the bottom plate 21 by the deck post 24. Reference numeral 21 is a flat bottom plate, 22 is a cylindrical side plate, and 23 is a floating roof deck. 24 is a deck post that supports the floating roof deck 23.
It is fixed to the sleeve tube 25 provided at the fixing portion 20.

As described above, by applying the positioning and fixing support structure of the fitting pipe body according to the first invention to the fixing portion 20 of the sleeve structure of the deck post 24 which supports the floating roof deck of the floating roof type storage tank. When the floating roof floats, the deck post 24 is firmly fixed to the fixed portion 20 so as not to move. Therefore, the fixed portion 20 does not loosen and become unstable due to the inflow and outflow of the liquid or the agitation of the liquid, and the deck post 24 does not vibrate due to the flow or the shaking of the liquid to generate an abnormal sound.

In addition, the positioning and fixing support structure of the fitting pipe body according to the second aspect of the present invention shown in FIG. 5 has a structure in which the fixing portion has no protrusions, is safe from catching, and has an excellent appearance. It is suitable for connections such as handrails, fences, fences, and special pedestals where projections interfere. Regarding the case where this fixed support structure without protrusions is applied to the connecting portions 30 of the mount 33 supporting the camera 32 of the cosmic ray telescope, for example,
Description will be made with reference to FIG. Reference numeral 31 is an upper and lower mirror that reflects the incident cosmic ray 35, and 32 is an upper and lower camera that captures the cosmic ray 35 reflected and focused by the mirror 31. 33 is a camera mount and 34 is a mirror mount. This camera stand 3
The fixed support structure having no protrusion described in FIGS. 5 and 6 is applied to the connecting portions 30 and 30 of the tubular body that forms the reference numeral 3, the fixing portion (not shown) of the camera, and the like.

Thus, the camera mount 3 of the cosmic ray telescope
When the fixed support structure formed in the threaded structure of the taper bolt and the taper nut according to the second aspect of the present invention is applied to the connecting portion 30 of the fitting pipe forming the third structure, the connecting structure 30 projects from the outer surface of the pipe to the outside. Since the projections of the connecting portion 30 become an obstacle and are not diffusely reflected in the incident region of the cosmic rays 35, the observation can be performed with less disturbance. When the positioning fixing support structure of the fitting pipe body according to the first aspect of the present invention is adopted for the camera mount 33 of the cosmic ray telescope, the position of the protrusion of the connecting portion such as the bolt and nut is set to the cosmic ray 35. It is also possible to minimize the diffused reflection of cosmic rays 35 by arranging so as to be hidden by the shadow of the tubular body in accordance with the incident direction of.

[0024]

As is apparent from the above description, the fitting and fixing structure for a fitting pipe body according to the present invention has a penetrating hole of the same diameter provided orthogonally to the inner and outer pipe bodies inserted in a loose fit shape. A half-divided tubular sleeve member that closely matches the hole wall of the through-hole is inserted into the hole so as to extend, and a truncated cone-shaped boss member that expands the half-divided tubular sleeve member outwardly faces the hole. Insert the bolt into the opposing truncated conical tubular boss member, tighten it with a nut and press it into the through hole, and press it from the inclined surface of the boss member that makes surface contact with the inclined surface of the sleeve member. Since the sleeve member is expanded outwardly and brought into close contact with the inner tube of the through hole and the hole wall of the outer tube, the inner and outer tube bodies can be connected and fixed without play, and vibration, distortion, and eccentric load do not occur, and structural safety is ensured. Is improved. The sleeve and boss members, which have a simple structure, can be attached and fixed, the axis of the tube can be easily aligned and the assembly can be performed with high precision, and the fixed portion does not move or loosen and is firmly fixed. A support structure can be provided.

Further, one of the opposing truncated conical tubular boss members is formed into a taper bolt in which a head member of the bolt is inclined, and the other is formed into a taper nut in which a nut member is inclined. In the case of the positioning and fixing support structure of the fitting pipe where the maximum diameter of the taper bolt and the taper nut is equal to or smaller than the size of the through hole, the bolt head member and the nut member do not project from the surface of the pipe, so things may get caught. Instead, it is a fixed support structure that is safe and aesthetically pleasing. Then, it becomes a fixed support structure suitable for a connecting portion of a structure such as a handrail, a fence, a cosmic ray telescope stand, or the like, in which projections interfere.

[Brief description of drawings]

FIG. 1 is an embodiment example of a positioning and fixing support structure for a fitting pipe body according to a first invention, (a) is a partially cutaway front sectional view, and (b) is a side view.

FIG. 2 is a cross-sectional explanatory view showing a part of the fixed support portion of FIG. 1 in an enlarged manner.

FIG. 3 is an explanatory view of a sleeve member, (a) is a side view and (b) is a front view.

FIG. 4 is an explanatory view of a boss member, in which (a) is a side view (b).
Is a front sectional view.

FIG. 5 is an explanatory longitudinal cross-sectional view seen from the front showing an embodiment of a positioning and fixing support structure for a fitting pipe body according to a second invention.

6 is a perspective explanatory view of the taper bolt and the taper nut shown in FIG. 5. FIG.

FIG. 7 is an explanatory view showing an example in which the positioning and fixing support structure for a fitting pipe body according to the first invention is applied to a deck post of a floating roof of a floating roof type storage tank.

FIG. 8 is an explanatory diagram showing an example in which the positioning and fixing support structure for a fitting pipe body according to the second invention is applied to a camera mount of a cosmic ray telescope.

FIG. 9 is an explanatory view showing a conventional example of a fixed support structure for a tubular body.

[Explanation of symbols]

1 Outer Tube 2 Inner Tube 3, 3a, 3b Through Hole 4 Bolts 5, 5a, 5b Sleeve Member 6 Nuts 7, 7a, 7b Boss Member 8 Contact Surface 9 Inclined Surface 10 Inclined Surface 11 Pushing Contact Surface 12 Tapered Bolt 12a Bolt head 13 Tapered nut 14 Bolt holding groove 15 Nut tightening groove 20 Fixing part 21 Bottom plate 22 Side plate 23 Floating roof deck 24 Deck post 25 Sleeve 30 connection part 31 Mirror 32 Camera 33 Camera mount 34 Mirror mount 35 Cosmic ray 101 Outer tube 102 Inner tube 103, 103a, 103b Through hole 104 Bolt 105 Washer 106 Nut

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Claims (2)

[Claims] 1. An end portion of a small-diameter pipe body is loosely inserted into an end portion of a large-diameter pipe body, and penetrates the pipe body of the fitting portion at right angles to the fitting portion of the pipe body. A positioning and fixing support structure for a fitting pipe body for positioning and fixing the small diameter pipe body by inserting a bolt into the through hole thus provided and tightening it with a nut. A sleeve member in the form of a half tube having an outer peripheral abutting surface closely matching with the outer peripheral abutting surface, and an inclined surface having a diameter reduced from the inner peripheral edges of both ends toward the through hole, While facing the inclined surface of the half-tubular sleeve member, the truncated conical tubular boss member having an inclined surface for expanding the sleeve member outwardly on the outer peripheral surface is made to face each other, and the tip portion from both end sides of the through hole is Insert it, insert the bolt into the opposing boss member, tighten with a nut, and insert it through the boss member. A fitting characterized in that the outer peripheral abutting surface of the sleeve member is pressed against the hole wall of the through hole to fix and support the small diameter pipe body in the large diameter pipe body in a state of being positioned at the through hole position. Positioning and fixing support structure for pipe body. 2. The opposing truncated conical tubular boss members are formed such that one of them is a tapered bolt whose head member is inclined and the other is a tapered nut which is inclined to a nut member, and 2. The positioning fixing support structure for a fitting pipe body according to claim 1, wherein the maximum diameters of the taper bolt and the taper nut are set to be equal to or smaller than the size of the through hole.