JP2014051781A - Reinforcement structure for metallic pipe column with opening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement structure for a metallic pipe column with an opening, in which cracks do not occur in the opening even when a flexural load and a torsional load are repeatedly added to the metallic pipe column due to wind, earthquake, traffic vibration, or the like.SOLUTION: A reinforcement structure for a metallic pipe column with an opening 2 penetrating through a peripheral wall 1a of a support body 1 and communicating with indoor and outdoor sides thereof has a window hole 3a connected to the opening 2 in the peripheral wall 1a. A frame body 3 for reinforcement integrally welded with a periphery of the opening 2 in an overlapping condition by fillet welding or the like is provided along the periphery of the opening 2. A material having a larger thickness than that of the peripheral wall 1a is applied as the frame body 3.

Description

  The present invention relates to a reinforcing structure in an opening of a metal pipe column used for a road lighting pole, a traffic signal pole, an electric road sign pole, or the like.

  Metal pipe columns used for road lighting poles, etc. are provided with an opening that penetrates the peripheral wall near the base of the column main body and communicates with the inside and outside of the column, through which electrical equipment such as switchboards and control panels are installed. Stored.

  After storing electrical devices such as switchboards and control panels, the opening can be prevented from entering rainwater, etc., and a lid with high sealing performance designed to be easily opened and closed for inspection etc. It is covered by the body.

  By the way, in recent years, in this type of metal tube strut, there are many cases where cracks occur in the opening due to repeated action of bending load or torsional load on the main body due to wind, earthquake, traffic vibration, etc. There is a problem that this crack can become a starting point of destruction and lead to breakage of the pole.

  As a prior art related to a reinforcing structure that solves the above-described conventional problems, Patent Document 1 includes a packing having a substantially U-shaped cross-section in which a groove is fitted in the periphery of the opening. The cover that closes the opening is provided with a protrusion having a shape substantially corresponding to the shape of the opening at the substantially center, and the opening is covered by fitting and inserting the protrusion into the opening. Things have been proposed.

  Further, in Patent Document 2, a longitudinal reinforcing material having a cross-sectional area equal to or larger than the cross-sectional defect of the cylinder by the opening along the left and right axial peripheral edges of the opening provided in the cylinder is disclosed in the opening. Patent Document 3 discloses that the upper and lower ends of each vertical reinforcing member are connected to a reinforcing ring provided on an outer peripheral surface of a cylinder with an opening interposed therebetween. Is a member in which a reinforcing member is arranged and welded around the opening, and in Patent Document 4, a frame-like reinforcing member is joined to the inner periphery of the notched end surface of the opening by butt welding, Each has a structure in which a lid is fitted into the inner periphery of the reinforcing member.

Japanese Utility Model Publication No. 57-53505 Japanese Utility Model Publication No. 60-35854 JP 2004-92254 A Japanese Patent No. 4052464

  However, in the structure in which the protrusion of the cover is reinforced by fitting it into the opening as in the above-mentioned Patent Document 1, it occurs due to bending load or torsion load that repeatedly acts due to recent wind, earthquake, traffic vibration, etc. The cracks that occur were not sufficient to prevent them.

  Further, in the reinforcing structure disclosed in Patent Document 2, stress concentrates on the welded portion of the longitudinal reinforcing member, and on the contrary, cracks are easily generated. Even when the reinforcing member is simply arranged and welded, when a bending load or a torsional load repeatedly acts, it has not yet been possible to reliably prevent the occurrence of a crack in the opening.

  In the one disclosed in Patent Document 4, a frame-shaped reinforcing member is joined to the inner periphery of the notch end surface of the opening by butt welding over the entire periphery, and a lid is fitted into the inner periphery of the reinforcing member. Although the improvement of strength can be expected to some extent, the processing is difficult and the cost is unavoidable.

  The subject of the present invention is that a metal tube strut having an opening is not easily cracked even if a bending load or a torsional load is repeatedly applied to the metal tube strut, and It is a place to propose an inexpensive, reinforcing structure.

  The present invention is a reinforcing structure of a metal tube column provided with an opening that penetrates the peripheral wall of the column main body and communicates with the inside and outside of the column main body, and has a window hole connected to the opening in the peripheral wall. A reinforcing frame that is integrally fixed in a superposed state along the periphery of the portion is provided, and the reinforcing frame has a thickness that is thicker than the peripheral wall. Reinforcement structure.

In the reinforcing structure of the metal tube strut having the opening portion configured as described above,
1) The window hole of the reinforcing frame has an opening size that exposes the edge of the opening with the fixing posture of the reinforcing frame, or is equal to or equal to the opening size of the opening. Having a smaller opening size,
2) The reinforcing frame is disposed on the outer surface of the peripheral wall,
3) The reinforcing frame is disposed on the inner surface of the peripheral wall,
4) The reinforcing frame is fixed to the peripheral wall by welding its entire circumference,
5) The opening and the window hole of the reinforcing frame have a circular, oval or square contour shape, and of those having a contour shape in which a corner portion is formed, R) is attached, and
The reinforcing frame has a seating surface that fits a lid that seals the opening, and that fixes and holds the lid via fastening means;
However, it is preferable as a specific means for solving the problems of the present invention.

  According to the reinforcing structure of the metal tube strut having the opening of the present invention, the reinforcing frame having a thicker thickness than the peripheral wall and having a window hole connected to the opening is formed on the peripheral wall. The strength of the opening is improved because it is integrally fixed along the circumference of the opening, and the opening is improved even if bending load or torsional load is repeatedly applied to the metal pipe column due to wind, earthquake, traffic vibration, etc. It is possible to avoid the occurrence of cracks in the part easily.

  Further, according to the reinforcing structure of the metal tube strut having the opening according to the present invention, the opening size of the window hole of the reinforcing frame exposing the edge of the opening with the fixing posture of the reinforcing frame. In this case, the edge of the opening exposed from the window hole can be used as the seating surface of the lid that closes the opening, and the reinforcement structure can be simplified.

  Further, when the window hole of the reinforcing frame has an opening size smaller than the opening size of the opening, the edge of the reinforcing frame exposed (projected) from the opening is It can be used as a seating surface of the lid that closes the opening, and the reinforcement structure can be simplified.

  Further, according to the reinforcing structure of the metal tube strut having the opening of the present invention having the above-described configuration, the reinforcing frame is disposed on the outer surface of the peripheral wall and fixed integrally, or is disposed on the inner surface of the peripheral wall. Therefore, the opening can be reinforced with a simple structure.

  In addition, according to the reinforcing structure of the metal tube strut having an opening according to the present invention, the entire circumference of the reinforcing frame is fixed to the peripheral wall by welding (fillet welding), so that the welded portion functions as a reinforcing bar. Strength is improved.

  Further, according to the reinforcing structure of the metal tube strut having the opening according to the present invention, the opening and the window hole of the reinforcing frame have a corner when the circular, oval or square outline shape is formed. For those having a contoured shape, since a round (R) is imparted to the corner portion, stress concentration that causes cracks in the corner portion does not occur.

  Furthermore, according to the reinforcing structure of the metal tube strut having the opening according to the present invention, the reinforcing frame is fitted to the lid that seals the opening, and the seat that fixes and holds the lid via the fastening means. Since it has a surface, it is possible to easily attach and remove the lid. In this case, since the lid is supported by the reinforcing frame, the lid itself does not affect the strength of the opening.

It is the figure which showed embodiment of the reinforcement structure according to this invention, (a) is the figure which showed the cross section (AA) of a metal pipe support | pillar, (b) is the figure which showed the side surface. is there. It is the perspective view which showed the external appearance in the base of the metal pipe support | pillar shown to Fig.1 (a) (b) in the decomposition | disassembly state. It is the figure which showed the state before attachment of the reinforcement frame, (a) is the figure which showed the cross section (BB) in the base part of a metal pipe support | pillar, (b) is the figure which showed the side surface. is there. It is the figure which showed the state after attachment of the reinforcement frame, (a) is the figure which showed the cross section (CC) in the base part of a metal pipe support | pillar, (b) is the figure which showed the side surface. is there. It is the figure which showed other embodiment of the reinforcement structure according to this invention, (a) is the figure which showed the cross section (DD) of a metal pipe support | pillar, (b) is the figure which showed the side surface. is there. It is explanatory drawing in the case of welding a frame for reinforcement to a surrounding wall. It is the figure which showed the state which attached the cover body in the reinforcement structure shown to Fig.5 (a) (b), (a) is the figure which showed the cross section (EE) in the base part of a metal pipe support | pillar, (b) ) Is a diagram showing the side. It is the figure which showed other embodiment of the reinforcement structure according to this invention, (a) is the figure which showed the cross section (FF) in the base part of a metal pipe support | pillar, (b) was the figure which showed the side surface It is. It is the figure which showed the state which attached the cover body in the reinforcement structure shown to Fig.8 (a) (b), (a) is the figure which showed the cross section (GG) in the base part of a metal pipe support | pillar, b) is a diagram showing the side surface. It is explanatory drawing in the case of welding a frame for reinforcement to a surrounding wall. It is the figure which showed other embodiment of the reinforcement structure according to this invention, (a) is the figure which showed the cross section (HH) in the base part of a metal pipe support | pillar, (b) shows the side surface. It is a figure. It is the figure which showed the state which attached the cover body in the reinforcement structure shown to Fig.11 (a) (b), (a) is the figure which showed the cross section (II) in the base part of a metal pipe support | pillar, b) is a cross-sectional view thereof.

  Unlike general construction structural members, metal tube columns used for road lighting poles, traffic signal poles, lightning-type road sign poles, etc. are not subject to large loads from above, so for example, road lighting equipment specifications As defined in the standards of documents (Construction Electrical Engineering Institute), etc., those having a wall thickness of about 3 to 6 mm are used.

  In general, metal pipe columns are used in locations exposed to wind and rain, so that when a lateral load is applied due to wind force or traffic vibration, the metal tube columns break at the base and collapse. Designed to ensure sufficient strength to prevent

  As the metal tube column, a taper tube having a taper shape with a taper of about 1/100 to 1/75 and a height (length) of about 10 m is usually used, and the ground side of the metal tube column is used. (Base) is provided with an opening communicating with the inside and outside, and after installing electrical equipment such as an electric control panel and a distribution board through the opening, a lid is applied to the opening to seal the opening. In general, the conventional reinforcement in the opening mainly includes reinforcement at the end face of the opening. Therefore, the reinforcement is provided in a metal tube column having a thickness of about 3 to 6 mm. In the opening, even if a process for reinforcement is added to the end face, the improvement effect is small.

  According to the present invention, a reinforcing frame having a thickness thicker than that of the peripheral wall is arranged around the opening provided in the peripheral wall, and the opening is reinforced by integrating the frame with the peripheral wall by welding. Is the main focus.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIGS. 1A and 1B are diagrams schematically showing an embodiment of a reinforcing structure according to the present invention, and FIG. 1A is a diagram showing a cross section at the base portion of a metal tube support, ) Is a diagram showing the side. 2 is a perspective view showing the outer appearance of the base portion of the metal tube strut shown in FIGS. 1A and 1B in an exploded state, and FIGS. 3A and 3B are reinforcing frames. FIG. 4A is a view showing a cross section of the base portion of the metal tube column, and FIGS. 4A and 4B are views showing the state after the reinforcing frame is attached. FIG.

  Reference numeral 1 in the figure denotes a column body of a metal tube column. The column main body 1 is constituted by a cylindrical peripheral wall 1a having a thickness of about 3 to 6 mm, and an inner space M in which an electric device such as an electric control panel or a distribution board can be arranged is formed inside. Yes.

  Reference numeral 2 denotes an opening that passes through the peripheral wall 1a and communicates with the inside and outside of the wall 1a. Although the opening 2 has been illustrated as an example having a long oval contour shape along the longitudinal direction (vertical direction) of the column main body 1, the shape is not particularly limited.

  Reference numeral 3 denotes a reinforcing frame that is integrally fixed in an overlapped manner along the periphery of the opening 2 on the outer surface of the peripheral wall 1a. The reinforcing frame 3 reinforces the column main body 1 from the outside with respect to the opening 2 and is thicker than the peripheral wall 1a (for example, about 9 mm with respect to the peripheral wall thickness of 3 to 6 mm). And is formed of a curved plate that fits the outer surface of the peripheral wall 1a, and is formed with a window hole 3a that is connected to the opening 2 in an overlapping state with the peripheral wall 1a. That is, since the reinforcing frame 3 can be formed of a curved plate that fits the outer surface of the peripheral wall 1a, it can be manufactured from a metal plate such as a steel plate having a thickness greater than that of the peripheral wall 1a, and the manufacturing cost is low. It will be something.

  Basically, the window hole 3a preferably has a contour shape equivalent to the shape of the opening 2, but the opening size can be changed as appropriate. The illustrated example shows a case where the edge size 2a of the opening 2 is exposed from the window hole 3a with the fixed posture of the reinforcing frame 3 as an example.

  Reference numeral 4 denotes a lid for sealing the opening 2, and 5 denotes a screw hole for fixing the lid 4 by screwing a screw N into the peripheral wall 1 a of the column body 1 above and below the lid 4.

  The lid 4 is processed to a size that fits inside the window hole 3a of the reinforcing frame 3, and is disposed on the edge 2a of the opening 2 via a member such as packing for preventing rainwater intrusion. The

  When the opening size of the window hole 3a of the reinforcing frame 3 is set such that the edge end 2a of the opening 2 can be exposed from the window hole 3a, the edge 2a attaches the lid 4 The lid 4 can be securely attached.

  In this case, the height of the outer surface of the reinforcing frame 3 and the height of the outer surface of the lid 4 are fixed to be the same (level) by appropriately adjusting the thickness of the lid 4 and the thickness of a member such as packing. Can look good. When the thickness of the reinforcing frame 3 is set to 9 mm, the thickness of the lid 4 is set to about 4.5 mm, and members such as packing are set to about 5 mm.

  In order to integrally fix the reinforcing frame 3 to the peripheral wall 1a, fillet welding may be performed over the entire periphery of the edge (inner peripheral edge) and the outer edge 3b of the window hole 3a of the reinforcing frame 3 (see FIG. Thereby, the reinforcing frame 3 is integrated with the column main body 1.

  In the reinforcing structure as described above, even if a crack occurs in the vicinity of the opening 2, the propagation is stopped in the reinforcing frame 3 (including the welded portion) having a thickness thicker than the peripheral wall 1 a. As a result, no further cracks develop. Moreover, since the welding site | part formed by fillet welding acts as a reinforcing bar, the intensity | strength of the opening part 2 improves.

  The opening 2 is shown as an example of an oblong shape that is long along the longitudinal direction of the column main body 1, and the window hole 3 a of the reinforcing frame 3 is shown as an example of the same shape. 2. As the shape of the window hole 3a, a shape having a circular or square contour shape in addition to an oval shape can be applied.

  In the case of applying, for example, a quadrangular shape in which a corner portion is formed as a contour shape, it is preferable to attach a round (R) (curve) so as not to cause stress concentration in the corner portion, Thereby, it becomes possible to suppress generation | occurrence | production of a crack.

  FIGS. 5A and 5B are diagrams showing another embodiment of the reinforcing structure according to the present invention. This example is the same as that shown in FIGS. 1 to 3 above in that the reinforcing frame 3 is provided on the outer surface of the peripheral wall 1a of the column main body 1 for reinforcement. The opening size of the window hole 3a is made substantially the same as the opening size of the opening 2, and fillet welding is performed over the entire periphery of the window hole 3a so as to be integrated with the peripheral wall 1a.

  Even in the reinforcing structure having the above-described structure, the strength at the opening 2 is improved, so that cracks are prevented from occurring in the opening 2 even when a bending load or a torsional load repeatedly acts due to wind force or traffic vibration. can do. Moreover, in this reinforcement structure, the stress which arises with opening / closing (attachment, removal) of the cover body 4 bears the reinforcement frame 3.

  In the case where the opening size of the window hole 3a of the reinforcing frame 3 is substantially equal to the opening size of the opening 2, as shown in FIG. 6, in order to secure a welding allowance when performing fillet welding. It is desirable to increase the opening size of the window hole 3a of the reinforcing frame 3 by the amount d.

  7 (a) and 7 (b) are views showing a state in which the lid 2 is attached and the opening 2 is sealed in the reinforcing structure shown in FIGS. 5 (a) and 5 (b). In the case where the opening size of the window hole 3 a of the reinforcing frame 3 is substantially equal to the opening size of the opening 2, the outer surface 3 c of the reinforcing frame 3 serves as a seating surface in contact with the lid 4. . In this case, a screw hole 5 is provided in the seat surface, and a screw is screwed into the screw hole 5 to fix and hold the lid 4 to the reinforcing frame 3.

  In attaching the lid 4, a member such as packing is disposed between the reinforcing frame 3 and the lid 4 as necessary in order to reliably prevent rainwater from entering.

  8 (a) and 8 (b) are examples in which the reinforcing frame 3 is fixed and held on the inner surface of the peripheral wall 1a of the support body 1 to reinforce the opening 2, and FIG. FIG. 8B is a view showing a state in which the opening 4 is sealed by disposing the lid body 4 in the support pipe shown in FIGS. 8A and 8B. The reinforcing frame 3 in this example is thicker than the peripheral wall 1a (for example, about 9 mm with respect to the thickness of the peripheral wall 3 to 6 mm), and is made of a curved plate that fits the inner surface of the peripheral wall 1a. A window hole 3a connected to the opening 2 is formed in an overlapped state with the peripheral wall 1a. That is, since the reinforcing frame 3 can be configured by a curved plate that fits the inner surface of the peripheral wall 1a, it can be manufactured from a metal plate such as a steel plate having a thickness greater than that of the peripheral wall 1a, and the manufacturing cost is low. It will be something.

  In this example, the opening size of the window hole 3a of the reinforcing frame 3 is made substantially the same as the opening size of the opening portion 2, and fillet welding is performed over the entire circumference (inner edge portion, outer edge portion). It is intended to be integrated with 1a. Also in this reinforcing structure, since the strength in the opening 2 is improved, it is possible to suppress the occurrence of cracks in the opening 2 even when a bending load or a torsional load repeatedly acts due to wind force or traffic vibration. . Moreover, since the welded part acts as a reinforcing bar by welding for fillet over the entire circumference of the reinforcing frame 3, the strength of the opening 2 is increased.

  In the case where the reinforcing frame 3 is disposed on the inner surface of the peripheral wall 1a and is integrally fixed, the welding allowance d is ensured when performing fillet welding, as shown in FIG. From the viewpoint, it is preferable to increase the size of the opening 2 in advance by the amount of welding allowance.

11 (a) and 11 (b), when the reinforcing frame 3 is arranged on the inner surface of the peripheral wall 1a of the support body 1 to reinforce the opening 2, the window hole 3a of the reinforcing frame 3 is formed. , and smaller than the opening size of the opening 2, there is shown an example of exposing the edge portion 3a ₁ of the window hole 3a of the reinforcing for frame 3 through the opening 2.

In this structure, as shown in FIGS. 12A and 12B, the edge 3a ₁ in the window hole 3a of the reinforcing frame 3 exposed from the opening 2 is a seating surface when the lid 4 is attached. Therefore, the lid 4 can be securely attached.

Edge end portion 3a ₁ of the particular, the exposure margin e in the vertical, by set larger than the other sites, may have been provided with a threaded hole 5 in this site.

  The outer surface of the lid body 4 and the outer surface of the peripheral wall 1a of the column main body 1 are flush with each other by appropriately setting the thickness of the lid body 4 and the thickness of a member such as packing disposed therebetween. Therefore, it is possible to maintain the aesthetic appearance, and since there is no protrusion, it is possible to improve safety by eliminating inadvertent catching at the site.

  In the present invention, since the thickness of the reinforcing frame 3 can be set to a relatively free thickness, the contour shape of the window hole 3a can be freely changed. In what is formed, a round (R) is attached so as not to cause stress concentration in the corner portion.

  According to the present invention, even when a bending load or a torsional load is repeatedly applied to a metal tube strut having an opening, the opening does not easily crack and is inexpensive and has a reinforcing structure. Can be provided.

DESCRIPTION OF SYMBOLS 1 Support | pillar main body 1a Peripheral wall 2 Opening part 2a Edge edge part 3 Reinforcing frame 3a Window hole 3b Outer edge part 3c Outer surface 4 Lid body 5 Screw hole M Internal space N Screw

Claims (7)

A reinforcing structure of a metal tube strut provided with an opening that penetrates the peripheral wall of the strut body and communicates with the inside and outside of the strut body,
Provided on the peripheral wall is a reinforcing frame that has a window hole connected to the opening, and is integrally fixed around the opening in an overlapping state.
The reinforcing structure of a metal pipe column having an opening, wherein the reinforcing frame has a thickness thicker than that of the peripheral wall.   The window hole of the reinforcing frame has an opening size that exposes the edge of the opening with the fixed posture of the reinforcing frame, or is equal to or larger than the opening size of the opening. The reinforcing structure of a metal pipe column having an opening according to claim 1, wherein the opening has a small opening size.   The reinforcing structure for a metal pipe column having an opening according to claim 1 or 2, wherein the reinforcing frame is disposed on an outer surface of the peripheral wall.   The reinforcing structure of a metal pipe column having an opening according to claim 1 or 2, wherein the reinforcing frame is disposed on an inner surface of the peripheral wall.   The reinforcement of the metal pipe column with an opening according to any one of claims 1 to 4, wherein the reinforcing frame is fixed to the peripheral wall by welding the entire circumference thereof. Construction.   The opening and the window hole of the reinforcing frame have a circular, oval or square contour shape, and of those having a contour shape in which a corner portion is formed, The reinforcement structure of the metal pipe | tube support | pillar provided with the opening part of any one of Claims 1-5 characterized by the above-mentioned.   7. The reinforcing frame according to claim 1, further comprising a seating surface that fits a lid that seals the opening, and that fixes and holds the lid via fastening means. Metal tube strut reinforcement structure with the described opening.

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