JP6049486B2 - Support structure for connecting strut and beam - Google Patents

Description

  The present invention relates to a connecting structure of a support and a beam and a support structure.

  In the support structure of the gate type or the cantilever type that supports the railway power overhead line and the road guide plate, it is common to connect the steel beam to the concrete support, but for the purpose of weight reduction, The thing using the beam made from an aluminum alloy is disclosed by patent document 1. FIG.

  The connection structure of the support column and the beam in the support structure of Patent Document 1 includes a pair of holding pieces for holding the support column and a fixing flange portion provided at the end of the beam. Each member for connection is also formed of an aluminum alloy. The clamping piece is formed with a flange portion in surface contact with the flange portion of the beam end portion, and the flange portions of the beam and the clamping piece are fastened with bolts and nuts. A plurality of gusset plates are welded to the flange portion of the beam and the outer peripheral surface of the beam as reinforcing members.

JP 2001-311412 A

  In the connection structure of Patent Document 1, it is necessary to weld a plurality of reinforcing gusset plates in addition to welding a plate material serving as a flange portion to the beam end portion. Therefore, not only the construction cost is increased due to the number of parts and the welding process, but also the dimensional accuracy of the beam material itself is lowered due to thermal contraction during welding, and the structural strength may be lowered.

  The present invention has been made in view of such problems, and it is an object of the present invention to provide a support structure and a connecting structure between a support column and a beam that can reduce the number of parts and the welding process and can suppress a decrease in dimensional accuracy. And

  The invention according to claim 1 for solving such a problem includes a pair of clamping members fixed to a support column and a connecting member fixed to an end of a beam, and at least one of the clamping members Has a flange part joined to the connecting member, and the connecting member has a cylinder part surrounding the beam and a fixing part fixed to the flange part, and the fixing part is the cylinder It is the connection structure of a support | pillar and a beam characterized by being integrally formed in the outer peripheral part of the part.

  In the connection structure as described above, the sandwiching member and the beam are joined via the connection member. However, since the end of the beam is inserted into the cylindrical portion of the connection member, the strength is excellent. . Further, since the cylindrical portion and the fixing portion of the connecting member are integrally formed, the number of parts can be reduced as compared with a case where these are separated. Furthermore, since the fixing part integrally formed on the outer peripheral part of the cylinder part and the flange part of the clamping member can be fixed via, for example, bolts and nuts, the fixing work is facilitated. Moreover, since the fixing portion also serves as a reinforcing material for the cylindrical portion, the strength is further improved. Furthermore, since the necessary welding process is only the joint portion between the cylindrical portion and the beam end portion, not only cost reduction but also suppression of a decrease in dimensional accuracy and improvement in construction efficiency associated therewith can be expected.

  In the invention which concerns on Claim 2, the said flange part is formed in the front-end | tip part of the rib which protruded toward the said beam from the outer peripheral surface of the said clamping member, It is characterized by the above-mentioned. According to such a configuration, the rib serves as a reinforcing member for the clamping member, and the flange portion is formed away from the outer peripheral surface. Therefore, when fixing with bolts and nuts, the insertion space for the tool is reduced. Can be secured.

  In the invention which concerns on Claim 3, the said clamping member and the said connection member are comprised by the extruded shape member made from aluminum alloy, It is characterized by the above-mentioned. According to such a configuration, it is possible to easily form the holding member and the connecting member having excellent dimensional accuracy.

  The invention according to claim 4 includes a support, a beam, a pair of holding members fixed to the support, and a connecting member fixed to an end of the beam, and at least one of the holding members is And a flange portion joined to the connecting member, the connecting member having a cylindrical portion surrounding the beam, and a fixing portion fixed to the flange portion, the fixing portion being the cylindrical portion It is the support structure characterized by being integrally formed in the outer peripheral part.

  According to such a support structure, as in the invention according to claim 1, the clamping member and the beam are joined via the connecting member, but the end of the beam is inserted into the cylindrical portion of the connecting member. Therefore, the strength is excellent. Further, since the cylindrical portion and the fixing portion of the connecting member are integrally formed, the number of parts can be reduced as compared with a case where these are separated. Furthermore, since the fixing part integrally formed on the outer peripheral part of the cylinder part and the flange part of the clamping member can be fixed via, for example, bolts and nuts, the fixing work is facilitated. Moreover, since the fixing portion also serves as a reinforcing material for the cylindrical portion, the strength is further improved. Furthermore, since the necessary welding process is only the joint portion between the cylindrical portion and the beam end portion, not only cost reduction but also suppression of a decrease in dimensional accuracy and improvement in construction efficiency associated therewith can be expected.

  In the invention which concerns on Claim 5, the said beam is provided with two intervals at the up-down direction, and a plane part is formed in the surface facing the said other beam among the outer peripheral surfaces of each said beam. A connecting material for connecting the beams is bridged between the flat portions of the pair of beams. According to such a configuration, since a ladder-like or truss-like structure composed of upper and lower beams and a connecting material is formed, bending rigidity is improved. Further, since the connecting material is bridged between the flat portions, the joining work is facilitated.

  According to the support structure of the support column and the beam and the support structure according to the present invention, it is possible to reduce the number of parts and the welding process, and it is possible to suppress a decrease in dimensional accuracy.

It is the perspective view which showed the connection structure of the support | pillar and beam which concern on embodiment of this invention. It is the front view which showed the support structure which concerns on embodiment of this invention, and the elements on larger scale which showed the connection structure. It is the perspective view which showed the clamping member. It is the end view which showed the clamping member. It is the perspective view which showed the fixed state of the connection member and the beam. (A) is the end view which showed the connection member, (b) is the end view which showed the beam. It is the perspective view which showed the connection structure of the support | pillar and beam which concern on other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, a gate-type support structure that supports a power overhead line of a railway will be described as an example.

  As shown in FIG. 2, the support structure 1 according to the present embodiment includes a pair of support columns 2 and 2 and a beam 10 spanned between the support columns 2 and 2. The support column 2 is made of concrete, for example, and a beam 10 is connected to the upper end portion thereof. In addition, the support | pillar 2 is not limited to the products made of concrete, and may be made of steel (steel pipe) or wooden. The beam 10 is made of an extruded shape made of an aluminum alloy, and is connected to the support column 2 by a connection structure 3. Two beams 10 are provided at intervals in the vertical direction. Between the pair of upper and lower beams 10, 10, a connecting material 11 is bridged to form a truss structure. The connecting material 11 is made of an oblique material and a vertical material made of an aluminum alloy, and is composed of, for example, a square pipe having a rectangular cross section. In addition, in FIG. 2, the shape which abbreviate | omitted one flange part 23 among the pair of clamping members 20 mentioned later is shown in figure.

  As shown in FIG. 1, the connection structure 3 is a structure for connecting the beam 10 to the column 2, and a pair of clamping members 20, 20 fixed to the column 2 and a connection fixed to the end of the beam 10. A member 50 is provided.

  As shown in FIGS. 1 and 3, the holding member 20 is combined with the other holding member 20 to hold the column 2. The clamping member 20 is formed by joining a pair of component parts 30 and 30 (see FIG. 4) made of an extruded shape made of an aluminum alloy, and the extrusion direction is the longitudinal direction (vertical direction) of the support column 2. Is arranged. The clamping member 20 includes a band portion 21, a rib 22, and a flange portion 23.

  The band portion 21 has a substantially semicircular arc shape (an arc shape slightly shorter than the semicircle) and is in contact with the outer peripheral surface of the column 2. At both ends in the circumferential direction of the band portion 21, flange portions 24 extending outward in the radial direction are formed. The flange portion 24 is formed with the same height as the band portion 21, and the upper end surface of the flange portion 24 and the upper end surface of the band portion 21 are flush with each other. The lower end surface of the flange portion 24 and the lower end surface of the band portion 21 are Is the same. A plurality of bolt insertion holes 25 (see FIG. 4) are formed in the flange portion 24 at predetermined intervals in the vertical direction. The flange portion 24 faces the flange portion 24 of the other holding member 20 with a gap, and a bolt B1 (see FIG. 1) for fixing the holding members 20 and 20 to each other is inserted into the bolt insertion hole 25. The The clamping members 20 and 20 are fixed together by screwing and tightening a nut N1 (see FIG. 2) to the tip of the bolt B1.

  The ribs 22 are provided at the intermediate portion in the circumferential direction of the band portion 21 and are provided in two rows at intervals in the circumferential direction. The pair of ribs 22, 22 both project from the outer peripheral surface of the intermediate portion in the circumferential direction of the band portion 21 toward the beam 10 and are parallel to each other. The rib 22 serves to support the flange portion 23. The rib 22 is formed with the same height as the band portion 21. The upper end surface of the rib 22 and the upper end surface of the band portion 21 are flush with each other, and the lower end surface of the rib 22 and the lower end surface of the band portion 21 are flush with each other.

  The flange portion 23 is a plate-like portion for fixing the connecting member 50 (see FIG. 1). The flange portion 23 is provided at the tip portion of the rib 22 and is formed so as to expand in the orthogonal direction with respect to the rib 22. The flange portion 23 is formed with the same height as the band portion 21 and the rib 22. The upper end surface of the flange portion 23 and the upper end surface of the rib 22 are flush with each other, and the lower end surface of the flange portion 23 and the lower end surface of the rib 22 are flush with each other. A plurality of bolt insertion holes 26 (see FIG. 3) are formed in the flange portion 23. The bolt insertion hole 26 is formed closer to the end of the flange portion 23 than the rib 22. A bolt B <b> 2 (see FIG. 1) for fixing the connecting member 50 to the flange portion 23 is inserted into the bolt insertion hole 26. Note that the flange 23 located on the side to which the beam 10 is not connected (the left back side in FIG. 1) does not need to form the bolt insertion hole 26.

  In the present embodiment, as shown in FIG. 1, the pair of sandwiching members 20, 20 have the same shape, but as shown in FIG. 2, the sandwiching member 20 on the side where the beam 10 is not connected has the flange portion 23. The shape may be omitted.

  As shown in FIG. 4, the clamping member 20 is configured by a pair of component parts 30, 30 that are divided at a circumferential intermediate portion of the band portion 21. The components 30 and 30 are made of extruded sections having the same cross-sectional shape. The component parts 30 and 30 are integrated by welding. The component 30 includes an arc portion 31 having a central angle of approximately 90 degrees (slightly smaller than 90 degrees), an overhang portion 32 (corresponding to the rib 22), a flat plate portion 33, and a bent portion 34 (on the flange portion 24). Equivalent). The component 30 is made of an extruded profile and is integrally formed. When the two component parts 30, 30 are connected, the arc portions 31, 31 become the band portion 21, and the flat plate portions 33, 33 become the flange portion 23. In the present embodiment, the sandwiching member 20 is formed by the two component parts 30 and 30 in consideration of the dimensions capable of forming the extruded profile. However, the sandwiching member can be formed by one extruded profile. If it is a size, it does not need to be divided.

  An inclined portion 35 that is inclined outward in the radial direction is formed at the joining side end of the arc portion 31. When the end portions of the inclined portion 35 are brought into contact with each other, a groove 36 is formed between the arc portions 31 and 31. A weld metal is poured into the groove 36 during welding, and the surface of the weld metal is processed so as to be a curved surface having the same curvature as the inner peripheral surface of the arc portion 31. An inclined portion 37 that is inclined inward in the radial direction is formed at the joining side end of the flat plate portion 33. When the end portions of the inclined portion 37 are brought into contact with each other, a groove 38 is formed between the flat plate portions 33 and 33. A weld metal is poured into the groove 38 during welding, and the surface of the weld metal is processed so as to be flush with the surface of the flat plate portion 33.

  As shown in FIGS. 1 and 5, the connecting member 50 includes a cylindrical portion 51 and a fixing portion 61. The connecting member 50 is made of an extruded shape made of aluminum alloy. The end surface of the connecting member 50 is cut so as to be orthogonal to the extrusion direction. The connecting member 50 is disposed such that its pushing direction (extending direction) is a direction (horizontal direction) orthogonal to the surface of the flange portion 23 (see FIG. 1) of the clamping member 20. The extending direction of the connecting member 50 is not limited to the direction orthogonal to the surface of the flange portion 23. If the cutting angle of the extruded profile is changed, the end face of the connecting member 50 is inclined with respect to the axial direction, and the fixing angle of the connecting member 50 with respect to the surface of the flange portion 23 can be changed.

  As shown in FIG. 5, the cylindrical portion 51 is a portion surrounding the beam 10. The end of the beam 10 is inserted into the cylindrical portion 51. One end of the tube portion 51 (the end on the side joined to the flange portion 23) protrudes from the end surface of the beam 10, and the end portion of the beam 10 and the inner peripheral surface of the tube portion 51 are welded all around. It is fixed by. The other end surface of the cylindrical portion 51 and the outer peripheral surface of the beam 10 are fixed by full circumference welding.

  As shown to (a) of FIG. 5 and FIG. 6, in this embodiment, the cylinder part 51 is exhibiting the cylindrical shape according to the shape of the extrusion shape material which comprises the beam 10 (refer FIG. 5). The inner peripheral surface of the cylindrical part 51 has the same shape as the outer peripheral surface of the beam 10. A flat portion 52 is formed on a part of the outer peripheral surface of the cylindrical portion 51 in the circumferential direction. The plane part 52 is formed along a plane orthogonal to the radial direction. The end surface of the joining material 11 is abutted against the flat surface portion 52, and the joining material 11 is fixed to the tube portion 51 by welding the entire abutting surface. Of the truss structure, a cylindrical portion 51 (the cylindrical portion of the connecting member 50 disposed on the upper side) 51 into which the beam 10 serving as the upper chord material is inserted is disposed such that the flat surface portion 52 faces downward, The cylindrical portion 51 (the cylindrical portion of the connecting member 50 disposed on the lower side) 51 into which the beam 10 is inserted is disposed such that the planar portion 52 faces upward.

  A thin portion 53 is formed on a portion of the outer peripheral surface of the cylindrical portion 51 that faces the flat portion 52 (an upper portion when the flat portion 52 faces downward). Moreover, the thin part 53 is formed in the right-and-left both sides among the outer peripheral parts of the cylinder part 51, and the weight reduction of the connection member 50 is achieved. The thin portion 53 is formed by denting the outer peripheral surface of the cylindrical portion 51 to the inside with a predetermined thickness.

  The fixing portion 61 is a portion fixed to the flange portion 23 and is integrally formed on the outer peripheral portion of the cylindrical portion 51. The fixing portion 61 has a cylindrical shape, and a bolt B <b> 2 for fixing the connecting member 50 to the flange portion 23 is inserted into the fixing portion 61. The fixed portion 61 has the same axial length as the cylindrical portion 51 (see FIG. 5). One end surface of the cylinder portion 51 and one end surface of the fixing portion 61 are flush with each other, and the other end surface of the cylinder portion 51 and the other end surface of the fixing portion 61 are flush with each other. The fixing portion 61 is disposed between the adjacent thin portions 53 and 53, or between the thin portion 53 and the flat portion 52, and is provided at four positions at a pitch of 90 degrees. The fixing portion 61 is formed at a position corresponding to the bolt insertion hole 26 (see FIG. 3) of the flange portion 23. Note that the axial length of the fixing portion 61 is not necessarily the same as that of the cylindrical portion 51, but also in this case, one end surface (end surface on the flange portion 23 side) of the fixing portion 61 contacts the flange portion 23. The one end surface of the fixing portion 61 and the one end surface of the cylindrical portion 51 are flush with each other so as to come into contact with each other. Further, the cross-sectional shape and size of the fixing portion 61 are not limited to the present embodiment, and can be appropriately changed according to the required bonding strength.

  As shown in FIG. 6B, the planar portion 12 is formed on a part of the outer peripheral surface of the beam 10 in the circumferential direction. The plane part 12 is formed along a plane orthogonal to the radial direction, and the connecting material 11 is fixed. The end surface of the connecting material 11 is abutted against the flat surface portion 12, and the joining material 11 is fixed to the beam 10 by welding the entire abutting surface. Of the truss structure, a beam (being arranged on the upper side) 10 serving as the upper chord member is arranged such that the plane portion 12 faces downward, and a beam (being arranged on the lower side) 10 serving as the lower chord member. Are arranged so that the plane portion 12 faces upward.

  Thick portions 13 are formed on portions of the outer peripheral surface of the beam 10 on both sides of the plane portion 12 (right and left side portions when the plane portion 12 is directed downward or upward). Is reinforced. This is because the upper and lower parts of the beam 10 are reinforced by the connecting material 11 while the left and right parts of the beam 10 are not reinforced, so that part is reinforced. The thick portion 13 swells inward and is formed thick.

Next, the construction method of the support structure 1 having the above-described configuration and the effects of the present invention will be described. When constructing the support structure 1, first, in a factory or the like, a pair of beams 10, 10 and a plurality of connecting members 11, 11.
Thereafter, the end of the beam 10 is inserted into the connecting member 50 and welded. The insertion depth at the end of the beam 10 is adjusted based on the measured value of the distance between the upper ends of the columns 2 and 2 installed on the site. Thus, since the connection member 50 is fixed according to the actual measurement value between the support | pillars 2 and 2, the dimensional accuracy of the beam 10 length containing the connection member 50 can be improved. Moreover, since the welding operation of the beam 10 and the connecting member 50 can be performed on the ground, accurate welding can be performed, and a reduction in dimensional accuracy due to thermal deformation can be minimized. After the fixing of the connecting member 50 is completed, the connecting member 11 (vertical member) is bridged and joined between the connecting members 50 and 50 provided at the end on the same side.

  The clamping member 20 is installed on the upper end of the support 2 in parallel with the above process. Note that the clamping member 20 is transported to the site after it is created by welding the component parts 30 and 30 in advance in a factory or the like. A pair of clamping members 20 and 20 are installed at a predetermined height of the support column 2, and a bolt B1 is inserted into the bolt insertion holes 25 and 25 of the adjacent flange portions 24 and 24, and a nut N1 is screwed to the tip portion thereof. The clamping member 20 is fixed to the support column 2 by tightening. At this time, since there is a gap between the adjacent flange portions 24, 24, the sandwiching members 20, 20 are attracted to each other, and the sandwiching members 20, 20 can firmly clamp and fix the support column 2.

  When the installation of the clamping member 20 is completed, the truss structure body to which the connecting member 50 is attached is lifted between the columns 2 and 2 so that the connecting member 50 is adjacent to the flange portion 23. Then, the bolt B2 is inserted from the beam 10 side into the bolt insertion hole 26 of the fixing portion 61 and the flange portion 23, and the nut N2 is screwed to the tip portion and tightened. As described above, the work at the upper end of the support column 2 can be performed only by tightening the bolts and nuts. Therefore, the work can be easily performed, and improvement in construction efficiency can be achieved. Furthermore, since it is not necessary to perform welding at a high place, it is not affected by the skill level of the worker and the dimensional accuracy is not lowered.

  Moreover, according to the support structure 1 and the connection structure 3 of the said structure, the following effects can also be show | played.

  In the connecting member 50, since the fixing portion 61 is integrally formed with the outer peripheral portion of the cylindrical portion 51, the fixing portion 61 serves as a reinforcing member for the cylindrical portion 51, and the strength can be further increased. Furthermore, since the formation of the connecting member 50 only needs to create and cut an extruded profile as compared with the conventional case, the number of parts can be reduced and the manufacturing process and the construction process can be reduced.

  Further, according to the support structure 1 and the connection structure 3, since the welding process can be reduced, a reduction in dimensional accuracy due to thermal deformation can be minimized, and the dimensional accuracy can be improved. Furthermore, the high dimensional accuracy of the members increases the assemblability and improves the construction efficiency.

  In the clamping member 20, the band portion 21 is reinforced by providing the rib 22 on the band portion 21. Furthermore, since the flange part 23 is formed via the rib 22, it is possible to secure an installation space for the nut N2 and a tool insertion space between the band part 21 and the flange part 23.

  By forming the holding member 20 with an extruded shape made of an aluminum alloy as a configuration in which the cross-sectional shape does not change in the axial direction, the holding member 20 having excellent dimensional accuracy can be easily formed. The same applies to the connecting member 50.

  Furthermore, since the flat portion 52 is formed on the cylindrical portion 51 of the connecting member 50 and the flat portion 12 is formed on the beam 10, the connecting material 11 can be easily and firmly fixed.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in this embodiment, the rib 22 and the flange part 23 are provided in the circumferential direction intermediate part of the clamping member 20, but it is not limited to this. As shown in FIG. 7, a flange portion 123 may be provided at a joint portion between the holding members 120 and 120. In this case, the flange portion 123 is divided into half-width flat plate portions 133 and 133 and provided on the respective holding members 120. The flat plate portion 133 is formed at each end of the rib 122 provided at both ends of the band portion 121. A bolt insertion hole (not shown) is formed in the rib 122. Adjacent ribs 122, 122 are in contact with each other and are fixed by tightening with bolts and nuts (not shown).

  Moreover, in the said embodiment, although the beam 10 is comprised with the aluminum alloy extruded profile with a circular cross section, it is not limited to this. You may comprise a beam by the cross-sectional rectangle or the extrusion shape member of various cross sections. In this case, the inner peripheral shape of the cylindrical portion of the connecting member is set to a shape that matches the outer peripheral shape of the beam.

  Furthermore, in the said embodiment, although an overhead wire is supported by the truss structure formed by connecting a pair of beams 10 and 10 with the some connecting material 11, 11, ..., it is not limited to this. The overhead wire may be supported by a single beam, or the overhead wire may be supported by a ladder-like structure or a three-dimensional truss-shaped structure.

DESCRIPTION OF SYMBOLS 1 Support structure 2 Support | pillar 3 Connection structure 10 Beam 11 Connecting material 12 Plane part 20 Holding member 21 Band part 22 Rib 23 Flange part 50 Connection member 51 Cylindrical part 52 Plane part 61 Fixing part B1 Bolt B2 Bolt N1 Nut N2 Nut

Claims (5)

A pair of clamping members fixed to the column and a connecting member fixed to the end of the beam;
At least one of the clamping members has a flange portion joined to the connection member,
The connecting member has a cylindrical portion surrounding the beam and a fixing portion fixed to the flange portion, and the fixing portion is integrally formed on an outer peripheral portion of the cylindrical portion. Connecting structure of struts and beams. The strut-beam connection structure according to claim 1, wherein the flange portion is formed at a tip portion of a rib projecting from the outer peripheral surface of the clamping member toward the beam.   The strut-beam connection structure according to claim 1, wherein the sandwiching member and the connecting member are made of an extruded shape made of an aluminum alloy. A column, a beam, a pair of clamping members fixed to the column, and a connecting member fixed to an end of the beam;
At least one of the clamping members has a flange portion joined to the connection member,
The connecting member has a cylindrical portion surrounding the beam and a fixing portion fixed to the flange portion, and the fixing portion is integrally formed on an outer peripheral portion of the cylindrical portion. Support structure. Two beams are provided at intervals in the vertical direction,
Of the outer circumferential surface of each beam, a plane portion is formed on the surface facing the other beam,
The support structure according to claim 4, wherein a connecting material that connects the beams is bridged between the flat portions of the pair of beams.

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