JP6328360B1 - Pedestal - Google Patents

Abstract

The pedestal includes a base unit, a tip unit, and an intermediate unit. The base unit includes a base attachment that is attached to the inside of the main pillar material of the steel tower, and a base body that can rotate together with the base attachment about a rotation axis that passes through the base attachment along the horizontal direction. A support wire is attached to the tip unit. The intermediate unit is a member for connecting the base unit and the tip unit. The main pillar material is inclined so that the upper end portion is located inside the steel tower from the lower end portion. The rotation axis is located on the main column member side with respect to a center line passing through the center of gravity of the base body and extending along the longitudinal direction of the base body. In the intermediate unit adjacent to the base unit, the width in the direction perpendicular to both the rotation axis and the center line decreases toward the base unit.

Description

  The present invention relates to a pedestal used for assembling and dismantling a steel tower.

  Conventionally, when a steel tower is assembled and dismantled, a mobile crane, a climbing crane, a pedestal (boom), or the like is used. However, mobile cranes require a relatively large carry-in route that leads to the construction site of the tower. Climbing cranes require temporary construction to carry the members. For this reason, when the construction site of a steel tower exists in the place which is not suitable for use of a mobile crane and a climbing crane, the pole which is easy to carry in is used. For example, Patent Document 1 describes an example of a base bar. As described in Patent Document 1, the pedestal is attached to the main pillar material of the steel tower via an attachment fitting.

Japanese Patent Laid-Open No. 2004-3160

  A support wire is attached to the base bar. When the operator operates the support wire, the angle formed by the base bar with respect to the vertical line is adjusted. Thereby, the operator can move the to-be-conveyed member suspended by the base bar to a desired position. However, in the prior art, when the angle formed by the pedestal with respect to the vertical line is reduced, the pedestal may come into contact with the main pillar material of the steel tower supporting the pedestal. For this reason, there is a limit to increasing the range in which the transported member can move.

  This invention is made | formed in view of the above, Comprising: It aims at providing the base rod which can enlarge the range which a to-be-conveyed member can move.

  In order to solve the above-described problems and achieve the object, a base rod according to an aspect of the present invention includes a base attachment attached to the inside of a main pillar material of a steel tower, and a rotation axis along a horizontal direction passing through the base attachment. A base unit having a base body that can be rotated together with the base attachment, a tip unit to which a support wire is attached, and a plurality of intermediate units for connecting the base unit and the tip unit. The main pillar material is inclined such that the upper end portion is located inside the tower from the lower end portion, and the rotation axis passes through the center of gravity of the base body and is a center line along the longitudinal direction of the base body In the intermediate unit adjacent to the base unit and perpendicular to both the rotation axis and the center line Width is smaller toward the base unit side.

  Thereby, even if the angle which a pedestal makes with respect to a horizontal surface becomes large, a pedestal does not contact a main pillar material easily. In other words, even if the angle that the pedestal makes with the horizontal plane is the upper limit angle in the prior art (the angle at which the pedestal contacts the main column material), there is a gap between the pedestal and the main column material. A gap is created. Therefore, the base bar can increase the range in which the transported member can move.

  As a desirable mode of the base rod, it is preferable that the distance from the center line to the rotation axis is not more than half of the minimum width of the base body in a direction orthogonal to both the rotation axis and the center line.

  Thereby, the bending moment which arises in a base attachment when a base bar is attached to a steel tower is suppressed. Therefore, damage to the base attachment is further prevented.

  As a desirable mode of the base rod, it is preferable that the base body includes four main members, and the four main members are arranged at the vertices of squares as viewed from the longitudinal direction of the base body.

  Thereby, compared with the case where the base body is composed of three main members, the strength of the base unit is easily improved, while the center line is far from the main column member. For this reason, when a rotating shaft overlaps with a centerline like the prior art, a base bar tends to contact a main pillar material. On the other hand, the rotation axis is positioned on the main pillar side with respect to the center line, and the four main members are arranged at the apexes of the square, thereby improving the strength of the base unit and the range in which the transported member can move. The expansion of both.

  ADVANTAGE OF THE INVENTION According to this invention, the base bar which can enlarge the range which a to-be-conveyed member can move can be provided.

Drawing 1 is a mimetic diagram showing the pedestal concerning this embodiment attached to the steel tower. FIG. 2 is a front view showing a pedestal according to the present embodiment. FIG. 3 is a front view showing the base unit according to the present embodiment. 4 is a cross-sectional view taken along the line DD in FIG. FIG. 5 is a front view showing the tip unit according to the present embodiment. FIG. 6 is a left side view showing the tip unit according to the present embodiment. 7 is a cross-sectional view taken along line EE in FIG. FIG. 8 is an enlarged view of a portion A in FIG. 9 is a cross-sectional view taken along line FF in FIG. FIG. 10 is an enlarged view of a portion B in FIG. FIG. 11 is a perspective view of a portion B in FIG. 12 is a plan view of a portion B in FIG. FIG. 13 is an enlarged view of a portion C in FIG. FIG. 14 is a front view showing the mounting bracket according to the present embodiment. FIG. 15 is a plan view showing a mounting bracket according to the present embodiment. FIG. 16 is a right side view showing the mounting bracket according to the present embodiment. FIG. 17 is an enlarged view showing a lower end portion of the bar according to the first comparative example attached to the steel tower. 18 is a cross-sectional view taken along the line GG in FIG. FIG. 19 is an enlarged view showing a lower end portion of the bar according to the present embodiment attached to the steel tower. 20 is a cross-sectional view taken along the line II in FIG. FIG. 21 is an enlarged view showing a part of the bar according to the second comparative example attached to the steel tower. 22 is a cross-sectional view taken along line JJ in FIG. FIG. 23 is an enlarged view showing a part of a pedestal according to the present embodiment attached to a steel tower. 24 is a cross-sectional view taken along the line KK in FIG. FIG. 25 is a flowchart showing a method of assembling the base bar according to the present embodiment. FIG. 26 is a diagram illustrating a support bar according to the present embodiment in the middle of assembly. FIG. 27 is a view showing a support bar according to the present embodiment in the middle of assembly. FIG. 28 is a diagram showing the base bar according to the present embodiment in the middle of assembly. FIG. 29 is a view showing a support bar according to the present embodiment in the middle of assembly. FIG. 30 is a view showing a support bar according to the present embodiment in the middle of assembly. FIG. 31 is a front view showing a base unit according to a modification.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the following modes for carrying out the invention (hereinafter referred to as embodiments). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the constituent elements disclosed in the following embodiments can be appropriately combined.

(Embodiment)
Drawing 1 is a mimetic diagram showing the pedestal concerning this embodiment attached to the steel tower. The pole 1 is used when the steel tower 10 is assembled or when the steel tower 10 is disassembled. That is, the pedestal 1 is used for the steel tower 10 under construction or the steel tower 10 to be dismantled. As shown in FIG. 1, the pedestal 1 is attached to the main pillar material 101 of the steel tower 10. The steel tower 10 has, for example, four main pillar materials 101. The main column 101 is angle steel. That is, the vertical cross section with respect to the longitudinal direction of the main pillar 101 is L-shaped. The four main pillar members 101 are arranged at positions corresponding to the vertices of the square in plan view. The longitudinal direction of the main column 101 is inclined with respect to the vertical line. Specifically, the main pillar material 101 is inclined so that the upper end portion is located inside the steel tower 10 from the lower end portion.

  The bar 1 is supported by the mounting bracket 5 and the support wire 72 shown in FIG. The pedestal 1 is attached to the main pillar material 101 via the mounting bracket 5. The mounting bracket 5 supports the pedestal 1 so that the pedestal 1 can rotate around the rotation axis Ax along the horizontal direction. One end of the support wire 72 is connected to the tip of the base bar 1, and the other end of the support wire 72 is connected to, for example, a winch installed on the ground. The support wire 72 is wound or unwound by the winch. Thereby, the angle which the base bar 1 makes with respect to a horizontal surface changes.

  As shown in FIG. 1, a lifting wire 71 is attached to the base bar 1. The lifting wire 71 is a wire for lifting the constituent material 102 of the tower 10. The lifting wire 71 is attached to the pulley 81, the pulley 82, and the pulley 83. The pulley 81 is fixed to the mounting bracket 5, for example. The pulley 82 is fixed to the tip attachment 32 provided at the tip of the base rod 1, for example. The pulley 83 is suspended from the pulley 82 and connected to the component 102. The lifting wire 71 is connected to, for example, a winch installed on the ground. The lifting wire 71 is wound up or drawn out by the winch. Thereby, the constituent material 102 is conveyed in the up-down direction.

  FIG. 2 is a front view showing a pedestal according to the present embodiment. As shown in FIG. 2, the base bar 1 includes a base unit 2, a tip unit 3, and an intermediate unit 4. Specifically, the base bar 1 includes ten intermediate units 4 and four intermediate unit pairs 40. The intermediate unit pair 40 is a pair of two intermediate units 4 assembled with bolts. In the following description, an XYZ orthogonal coordinate system is used. The X axis is an axis along the rotation axis Ax when the pedestal 1 is attached to the steel tower 10. The Z axis is an axis along the longitudinal direction of the base bar 1. The Y axis is an axis orthogonal to the X axis and the Z axis. Of the directions along the Z axis, the direction from the base unit 2 toward the tip unit 3 is described as + Z direction, and the direction opposite to the + Z direction is described as -Z direction. That is, the left direction in FIG. 2 is the + Z direction, and the right direction in FIG. 2 is the −Z direction.

  As shown in FIG. 2, the base unit 2, the intermediate unit 4, the four intermediate unit pairs 40 (eight intermediate units 4), the intermediate unit 4, and the tip unit 3 are arranged in this order from one end of the base 1. The base unit 2 is joined to the intermediate unit 4 with bolts. The intermediate unit 4 joined to the base unit 2 with a bolt is joined to the intermediate unit pair 40 with a pin. The intermediate unit pairs 40 are joined by pins. The tip unit 3 is joined to the intermediate unit 4 with a bolt. The intermediate unit 4 joined to the tip unit 3 with a bolt is joined to the intermediate unit pair 40 with a pin.

  In other words, the first joint J 1 that joins the base unit 2 and the intermediate unit 4 is the bolt joint 9. The second joint J2 that joins the tip unit 3 and the intermediate unit 4 is a bolt joint 9. The third joint J3 that joins the adjacent intermediate units 4 is the bolt joint 9 or the pin joint 6.

  FIG. 3 is a front view showing the base unit according to the present embodiment. 4 is a cross-sectional view taken along the line DD in FIG. The base unit 2 is located at the lower end when the base 1 is attached to the steel tower 10 as shown in FIG. The length of the base unit 2 in the Z direction is, for example, 1.5 m. As shown in FIG. 3, the base unit 2 includes a base body 21 and a base attachment 22.

  The base body 21 includes four main members 211 and a plurality of diagonal members 212 that connect the main members 211 to each other. The main material 211 and the diagonal material 212 are cylindrical members made of, for example, steel. As shown in FIG. 4, the four main members 211 are arranged at the apexes of the square 29 when viewed from the Z direction. Further, as shown in FIG. 3, the main material 211 is inclined with respect to the Z axis. Specifically, when viewed from the X direction, the width D3 in the Y direction at the end in the −Z direction of the base body 21 is smaller than the width D2 in the Y direction at the end in the + Z direction of the base body 21.

  The base attachment 22 is attached to one end of the base body 21. The base attachment 22 is a plate-like member having an attachment hole 23 along the X axis. The base attachment 22 is attached to the inside of the main pillar member 101 via the attachment fitting 5. When the bar 1 is attached to the main pillar 101, a connecting member 545 described later is inserted into the attachment hole 23. The pedestal 1 attached to the main pillar 101 rotates about a rotation axis Ax along the axial direction of the connecting member 545. As shown in FIG. 3, the mounting hole 23 passes through the center of gravity GP2 of the base body 21 and is separated in the Y direction with respect to the center line L1 along the Z axis. That is, the rotation axis Ax is eccentric with respect to the center line L1. The distance D1 from the center line L1 to the mounting hole 23 is smaller than half of the width D2, for example. It can be said that the center line L1 is a bisector of a line segment connecting one end of one main member 211 and one end of another main member 211. Further, it can be said that the center line L1 is a straight line having the same distance from the two main members 211 when viewed from the X-axis direction. As shown in FIG. 3, when viewed from the X direction, the main material 211 makes an angle α with respect to the center line L1.

  When the pedestal 1 is attached to the steel tower 10, the weight of the pedestal 1 acts on the base attachment 22. At this time, it is desirable that the bending moment generated in the base attachment 22 is as small as possible. In the base unit 2, since the distance D1 is smaller than half of the width D2, the bending moment generated in the base attachment 22 when the base bar 1 is attached to the steel tower 10 is suppressed. For this reason, damage to the base attachment 22 is prevented. Furthermore, the distance D1 is preferably smaller than half of the width D3. Thereby, damage to base attachment 22 is prevented more.

  FIG. 5 is a front view showing the tip unit according to the present embodiment. FIG. 6 is a left side view showing the tip unit according to the present embodiment. 7 is a cross-sectional view taken along line EE in FIG. The tip unit 3 is located at the upper end when the base 1 is attached to the steel tower 10 as shown in FIG. The length of the tip unit 3 in the Z direction is, for example, 1.5 m. As shown in FIG. 5, the tip unit 3 includes a tip body 31 and a tip attachment 32.

  The tip body 31 includes four main members 311 and a plurality of diagonal members 312 connecting the main members 311. The main material 311 and the diagonal material 312 are cylindrical members made of steel, for example. The four main members 311 are arranged at the vertices of a square when viewed from the Z direction, similarly to the base body 21. As shown in FIG. 5, the main material 311 is inclined with respect to the Z axis. Specifically, the width D5 in the Y direction at the end in the + Z direction of the tip body 31 is smaller than the width D4 in the Y direction at the −Z direction end of the tip body 31. For example, the width D4 is the same as the width D2 (see FIG. 3), and the width D5 is the same as the width D3 (see FIG. 3). As shown in FIG. 5, when viewed from the X direction, the main material 311 forms an angle β with respect to the center line L1. The size of the angle β is equal to the size of the angle α shown in FIG.

  The tip attachment 32 is attached to one end of the tip body 31. As shown in FIGS. 6 and 7, the tip attachment 32 includes a fixed portion 321, a shaft 322, a nut 323, a sleeve 325, a bearing 326, and a rotating portion 324. The fixing portion 321 is fixed to the end portion of the distal end body 31. For example, the support wire 72 shown in FIG. 1 is attached to the fixing portion 321 through a hole provided in the fixing portion 321. The shaft 322 is a bolt fixed to the flange 329. The flange 329 is fixed to the end of the distal end body 31. The nut 323 is a member for positioning the rotating part 324. The sleeve 325 is a cylindrical member fitted to the shaft 322. The bearing 326 is fitted on the outer peripheral surface of the sleeve 325. The rotating part 324 is fitted on the outer ring of the bearing 326 and rotates around the shaft 322. The rotating unit 324 includes, for example, four wings 3241. A support wire 72 or a pulley 82 shown in FIG. 1 is attached to the wing 3241 through a hole provided in the wing 3241.

  FIG. 8 is an enlarged view of a portion A in FIG. 9 is a cross-sectional view taken along line FF in FIG. FIG. 10 is an enlarged view of a portion B in FIG. FIG. 11 is a perspective view of a portion B in FIG. 12 is a plan view of a portion B in FIG. The intermediate unit 4 is a member for connecting the base unit 2 and the tip unit 3. FIG. 13 is an enlarged view of a portion C in FIG. The length of the intermediate unit 4 in the Z direction is, for example, 1.5 m. As shown in FIG. 8, the intermediate unit 4 includes an intermediate body 41.

  The intermediate body 41 includes four main members 411 and a plurality of diagonal members 412 that connect the main members 411 to each other. The main material 411 and the diagonal material 412 are cylindrical members made of, for example, steel. The four main members 411 are arranged at the vertices of a square when viewed from the Z direction, similarly to the base body 21. The four main members 411 are parallel to each other. The center of gravity GP4 of the intermediate body 41 shown in FIG. 9 is collinear with the center of gravity GP2 of the base body 21 (see FIG. 3) and the center of gravity GP3 of the tip body 31 (see FIG. 5). For example, in one intermediate unit 4, diagonal members 412 adjacent in the Z direction are arranged in opposite directions. That is, the plurality of diagonal members 412 are arranged in a zigzag manner. Thereby, the torsional strength of the base bar 1 is improved.

  As shown in FIG. 8, the bolt joint 9 includes a flange 93, a bolt 91, and a nut 92. The flange 93 is fixed to one end of the intermediate body 41. The adjacent intermediate units 4 are arranged so that the flanges 93 face each other. Adjacent intermediate units 4 are joined by bolts 91 and nuts 92 attached to holes provided in the flange 93. As shown in FIG. 9, bolts 91 and nuts 92 are arranged, for example, at eight locations. The nut 92 is preferably tightened with a predetermined torque. Therefore, the nut 92 is tightened in a state where the two intermediate units 4 are placed sideways on the ground or the jig. The bolt joint 9 between the base unit 2 and the intermediate unit 4 and the bolt joint 9 between the tip unit 3 and the intermediate unit 4 are the same as the bolt joint 9 between the two intermediate units 4. is there.

  As shown in FIG. 10, the pin joint 6 is provided at one end of the intermediate body 41. As shown in FIGS. 11 and 12, the pin joint 6 includes a female member 62, a male member 61, a pin 64, and a lock pin 65. The female member 62 is a member having a substantially U shape when viewed from the Y direction. The female member 62 includes two holes 62h that overlap when viewed from the X direction. The male member 61 fits into the female member 62. The male member 61 includes a hole 61h that overlaps the two holes 62h. The pin 64 is disposed at a position straddling the hole 62h and the hole 61h. The pin 64 includes a base portion 641, a retaining portion 642, a tapered portion 643, and a hole 644. The outer periphery of the retaining portion 642 is larger than the outer periphery of the base portion 641. The outer periphery of the tapered portion 643 is smaller than the outer periphery of the base portion 641. The outer periphery of the taper portion 643 decreases toward the tip. Thereby, the pin 64 is easily inserted into the hole 62h and the hole 61h. The lock pin 65 is a so-called snap pin. The lock pin 65 is inserted into the hole 644 after the pin 64 passes through the hole 62h and the hole 61h. The pin 64 is positioned by the retaining portion 642 and the lock pin 65. As a result, the two intermediate units 4 are joined by the pins 64. For example, in a state where one intermediate unit 44 is lifted, the two intermediate units 4 are joined by the pins 64. For this reason, the connection work by the pin 64 can be performed even in a narrow place.

  As shown in FIG. 13, in the intermediate unit 4 adjacent to the base unit 2 (hereinafter referred to as the intermediate unit 4a), the main material 411 is inclined with respect to the Z axis. Specifically, the width D7 in the Y direction at the end in the −Z direction of the intermediate unit 4a is smaller than the width D6 in the Y direction at the end in the + Z direction of the intermediate unit 4a. For example, the width D7 is the same as the width D2 (see FIG. 3). When viewed from the X direction, the main material 411 of the intermediate unit 4a forms an angle γ with respect to the center line L1. The size of the angle γ is equal to the size of the angle α shown in FIG.

  As shown in FIG. 13, in the intermediate unit 4 adjacent to the intermediate unit 4a (hereinafter referred to as the intermediate unit 4b), the main material 411 is inclined with respect to the Z axis. Specifically, the width D9 in the Y direction at the end in the −Z direction of the intermediate unit 4b is smaller than the width D8 in the Y direction at the end in the + Z direction of the intermediate unit 4b. For example, the width D9 is the same as the width D6. When viewed from the X direction, the main material 411 of the intermediate unit 4b forms an angle δ with respect to the center line L1. The magnitude of the angle δ is equal to the magnitude of the angle γ.

  As shown in FIG. 13, the third joint J3 between the intermediate unit 4a and the intermediate unit 4b is a pin joint 6. The male member 61 and the female member 62 of the pin joint 6 located between the intermediate unit 4a and the intermediate unit 4b are not inclined with respect to the Z axis. That is, as shown in FIG. 13, the straight line L2 forms an angle with the main material 411 and is parallel to the center line L1. The straight line L2 is a straight line parallel to the outer edges of the male member 61 and the female member 62 when viewed from the X direction. If the straight line L2 is inclined with respect to the center line L1, the positions of the holes 61h and the holes 62h are likely to be shifted between the pin joints 6 adjacent in the X direction. On the other hand, since the straight line L2 is parallel to the center line L1, alignment of the hole 61h and the hole 62h between the pin joints 6 adjacent to each other in the X direction becomes easy. Further, as shown in FIG. 13, the female member 62 is attached to the intermediate unit 4a in one of the two pin joints 6 arranged in the Y direction, and the male member 61 is attached to the intermediate unit 4b on the other side. That is, in the two pin joints 6 arranged in the Y direction, the arrangement of the male member 61 and the female member 62 is reversed.

  Further, as shown in FIG. 2, an intermediate unit 4a is attached to the tip unit 3, and an intermediate unit 4b is attached to the intermediate unit 4a. The intermediate unit 4 a and the intermediate unit 4 b arranged on the tip unit 3 side are also joined by the pin joint 6.

  FIG. 14 is a front view showing the mounting bracket according to the present embodiment. FIG. 15 is a plan view showing a mounting bracket according to the present embodiment. FIG. 16 is a right side view showing the mounting bracket according to the present embodiment. The mounting bracket 5 is a device arranged between the base bar 1 and the main pillar 101 of the steel tower 10. The mounting bracket 5 supports the pedestal 1 so that the pedestal 1 can rotate around a rotation axis Ax parallel to the horizontal plane. The mounting bracket 5 includes an inner plate 51, an outer plate 52, a base bar connecting portion 54, and a pulley connecting portion 55.

  Inner plate 51 is arranged inside main pillar 101 which is angle steel. The outer plate 52 is disposed outside the main pillar material 101. Bolts 511 are attached to the inner plate 51 with nuts 512. An eyebolt 521 is attached to the outer plate 52 with a nut 522. The bolt 511 passes through the ring of the eyebolt 521. When the nut 522 is tightened, the main pillar material 101 is sandwiched between the inner plate 51 and the outer plate 52. Thereby, the mounting bracket 5 is fixed to the main pillar material 101.

  The pedestal coupling portion 54 is a member that supports the pedestal 1. As shown in FIGS. 14 to 16, the base bar connecting portion 54 includes a bolt 541, a nut 542, a pair of hold plates 543, a connecting member 545, and a nut 546. The bolt 541 passes through the inner plate 51 and is fixed to the inner plate 51 with a nut 542. The pair of hold plates 543 are plate-like members that are parallel to each other. The pair of hold plates 543 protrude from the ends of the bolts 541. The base attachment 22 (see FIG. 3) of the base unit 2 is disposed between a pair of hold plates 543. The connecting member 545 passes through the holding plate 543 and the attachment hole 23 of the base attachment 22, and is fixed to the hold plate 543 with a nut 546. Thereby, the base bar 1 is connected to the base bar connecting portion 54. The pedestal 1 can rotate around a rotation axis Ax along the axial direction of the connecting member 545.

  The pulley connecting portion 55 is a member that supports the pulley 81 (see FIG. 1). As shown in FIGS. 14 and 15, the pulley coupling portion 55 includes a pair of hold plates 553, bolts 555, and nuts 556. The pair of hold plates 553 are plate-like members that are parallel to each other. The pair of hold plates 553 are fixed to the inner plate 51. For example, the support fitting provided on the pulley 81 is disposed between the pair of hold plates 553. The bolt 555 passes through the hold plate 553 and the support fitting of the pulley 81 and is fixed to the hold plate 553 with a nut 556. As a result, the pulley 81 is connected to the pulley connecting portion 55.

  FIG. 17 is an enlarged view showing a lower end portion of the bar according to the first comparative example attached to the steel tower. 18 is a cross-sectional view taken along the line GG in FIG. FIG. 19 is an enlarged view showing a lower end portion of the bar according to the present embodiment attached to the steel tower. 20 is a cross-sectional view taken along the line II in FIG. The base unit 2Z according to the first comparative example includes a base attachment 22Z different from the base attachment 22 according to the present embodiment. The attachment hole 23Z provided in the base attachment 22Z is on the center line L1 when viewed in the X direction.

  The base unit 2Z according to the first comparative example and the base unit 2 according to the present embodiment are attached to the main column member 101 via the same mounting bracket 5. For this reason, the distance G1Z from the mounting hole 23Z to the corner portion 101a of the main column member 101 is the same as the distance G1 from the mounting hole 23 to the corner portion 101a of the main column member 101. As shown in FIG. 17, when the angle θZ formed by the center line L <b> 1 and the horizontal line H increases, the base unit 2 </ b> Z contacts the main pillar material 101. When the angle θZ when the base unit 2Z is in contact with the main column member 101 is Z °, the upper limit of the angle θZ is Z °.

  On the other hand, in the base unit 2 according to the present embodiment, the mounting hole 23 is separated in the Y direction with respect to the center line L1. Therefore, even if the angle θ1 (see FIG. 19) formed by the center line L1 shown with respect to the horizontal line H reaches Z ° of the first comparative example, the base unit 2 does not contact the main column member 101. That is, as shown in FIG. 20, a gap is generated between the base unit 2 and the main pillar material 101. For this reason, the upper limit of the angle θ1 is larger than the upper limit (Z °) of the angle θZ. According to the pedestal 1 according to the present embodiment, the movable range of the tip unit 3 is increased as compared with the first comparative example.

  FIG. 21 is an enlarged view showing a part of the bar according to the second comparative example attached to the steel tower. 22 is a cross-sectional view taken along line JJ in FIG. FIG. 23 is an enlarged view showing a part of a pedestal according to the present embodiment attached to a steel tower. 24 is a cross-sectional view taken along the line KK in FIG. The base bar 1Y according to the second comparative example is different from the present embodiment in that the main material 411 is parallel to the center line L1 in all the intermediate units 4. That is, the base bar 1Y does not include the intermediate unit 4 (the intermediate unit 4a and the intermediate unit 4b shown in FIG. 13) in which the main material 411 is inclined with respect to the center line L1. Unlike the first comparative example, the bar 1Y has a base unit 2 similar to the present embodiment.

  As shown in FIGS. 21 and 22, in the second comparative example, when the angle θY between the center line L1 and the horizontal line H increases, the upper end of the base unit 2 (the boundary between the base unit 2 and the intermediate unit 4). Part) is in contact with the main pillar 101. Since the mounting hole 23 is located on the main column member 101 side with respect to the center line L 1, the upper end portion of the base unit 2 comes into contact with the main column member 101 before the lower end portion of the base unit 2. When the angle θY when the bar 1Y is in contact with the main pillar 101 is Y °, the upper limit of the angle θY is Y °. Y ° is larger than Z ° of the first comparative example.

  Further, when the angle θY is increased, the pulley 82 and the lifting wire 71 are in contact with the lower end portion of the tip unit 3 (the boundary portion between the tip unit 3 and the intermediate unit 4). The angle θY at this time is X °. When the pulley 82 and the lifting wire 71 are in contact with the tip unit 3, the movement of the lifting wire 71 is inhibited. For this reason, it is desirable that the pulley 82 and the lifting wire 71 do not contact the tip unit 3.

  On the other hand, in the base rod 1 according to the present embodiment, the intermediate unit 4a and the intermediate unit 4b shown in FIG. For this reason, even if the angle θ2 (see FIG. 23) formed by the center line L1 with respect to the horizontal line H reaches Y ° in the second comparative example, the base bar 1 does not contact the main pillar material 101. That is, as shown in FIG. 24, a gap is generated between the base bar 1 and the main pillar material 101. For this reason, the upper limit of the angle θ2 is larger than the upper limit (Y °) of the angle θY. According to the pedestal 1 according to the present embodiment, the movable range of the tip unit 3 is increased as compared with the second comparative example.

  Further, in the present embodiment, the intermediate unit 4a and the intermediate unit 4b shown in FIG. For this reason, even if the angle θ2 reaches X ° in the second comparative example, the pulley 82 and the lifting wire 71 do not contact the lower end portion of the tip unit 3. According to the pedestal 1 according to the present embodiment, the pulley 82 and the lifting wire 71 are less likely to contact the tip unit 3 as compared to the second comparative example.

  FIG. 25 is a flowchart showing a method of assembling the base bar according to the present embodiment. FIG. 26 is a diagram illustrating a support bar according to the present embodiment in the middle of assembly. FIG. 27 is a view showing a support bar according to the present embodiment in the middle of assembly. FIG. 28 is a diagram showing the base bar according to the present embodiment in the middle of assembly. FIG. 29 is a view showing a support bar according to the present embodiment in the middle of assembly. FIG. 30 is a view showing a support bar according to the present embodiment in the middle of assembly.

  The bar 1 is assembled at the construction site of the steel tower 10. Specifically, the base unit 2, the tip unit 3, and the plurality of intermediate units 4 assembled in advance in a factory or the like are transported to the construction site of the steel tower 10. The weight of the base unit 2, the tip unit 3, and the intermediate unit 4 is, for example, 45 kg or less. For this reason, the base unit 2, the tip unit 3, and the intermediate unit 4 can be transported manually. The base unit 2, the tip unit 3, and the plurality of intermediate units 4 are joined to each other by bolts or pins after being transported to the construction site of the steel tower 10.

  First, the base unit 2 is joined to the intermediate unit 4a with a bolt (step ST1 in FIG. 25). Specifically, as shown in FIG. 26, the base unit 2 and the intermediate unit 4 a are joined by a plurality of bolts 91 and nuts 92 that pass through the flange 93 of the intermediate unit 4 a and the flange 93 of the base unit 2.

  Next, the tip unit 3 is joined to the intermediate unit 4a with a bolt (step ST2 in FIG. 25). Specifically, as shown in FIG. 27, the tip unit 3 and the intermediate unit 4a are joined by a plurality of bolts 91 and nuts 92 that pass through the flange 93 of the intermediate unit 4a and the flange 93 of the tip unit 3.

  Next, the two intermediate units 4 are joined with bolts to form an intermediate unit pair 40 (step ST3 in FIG. 25). Specifically, as shown in FIG. 28, the two intermediate units 4 are joined by a plurality of bolts 91 and nuts 92 that pass through the flanges 93 of the two intermediate units 4. In step ST3, four pairs of intermediate units 4 are joined. That is, four intermediate unit pairs 40 are formed.

  Next, the tip unit 3 is lifted (step ST4 in FIG. 25). For example, as shown in FIG. 29, the tip unit 3 is lifted by a wire 75 attached to the tip attachment 32 and a winch connected to the wire 75. When the tip unit 3 is lifted, the intermediate unit 4a joined to the tip unit 3 is also lifted. For this reason, the front end unit 3 and the intermediate unit 4a are along the vertical direction.

  Next, the intermediate unit pair 40 is joined with the pin 64 to the intermediate unit 4a joined to the tip unit 3 (step ST5 in FIG. 25). Specifically, as shown in FIG. 29, the male member 61 of the intermediate unit 4 a joined to the tip unit 3 is fitted into the female member 62 of the intermediate unit pair 40. At the same time, the female member 62 of the intermediate unit 4a is fitted into the male member 61 of the intermediate unit pair 40. Then, the pin 64 is inserted into the male member 61 and the female member 62, and the lock pin 65 is inserted into the pin 64. Thereby, the pin joint 6 is formed between the intermediate unit 4 a and the intermediate unit pair 40 joined to the tip unit 3.

  Next, the intermediate unit pairs 40 are joined with pins (step ST6 in FIG. 25). Specifically, as shown in FIG. 30, the male member 61 of the intermediate unit pair 40 is fitted into the female member 62 of the intermediate unit pair 40. Then, the pin 64 is inserted into the male member 61 and the female member 62, and the lock pin 65 is inserted into the pin 64. Thereby, the four intermediate unit pairs 40 are joined. That is, the pin joint 6 is formed between adjacent intermediate unit pairs 40. For example, after the joining of the pair of intermediate unit 40 is finished, the wire 75 is wound up, and the height of the base bar 1 during the assembly is adjusted. Specifically, the wire 75 corresponding to the length (3 m) of the intermediate unit pair 40 is wound up. Thereby, since the joining by the pin 64 is performed with a fixed height, working efficiency improves.

  Next, the intermediate unit 4a joined to the base unit 2 is joined to the intermediate unit pair 40 with the pin 64 (step ST7 in FIG. 25). Specifically, as shown in FIG. 30, the male member 61 of the intermediate unit 4 a joined to the base unit 2 is fitted into the female member 62 of the intermediate unit pair 40. At the same time, the female member 62 of the intermediate unit 4a is fitted into the male member 61 of the intermediate unit pair 40. Then, the pin 64 is inserted into the male member 61 and the female member 62, and the lock pin 65 is inserted into the pin 64. Thereby, the pin joint 6 is formed between the intermediate unit 4 a and the intermediate unit pair 40 joined to the base unit 2.

  The pedestal 1 is completed by the above steps ST1 to ST7. The steps performed in a state where the member is placed on the ground or the like are from step ST1 to step ST3. The sum of the length of the base unit 2 and the length of the intermediate unit 4a, the sum of the length of the tip unit 3 and the length of the intermediate unit 4a, and the length of the intermediate unit pair 40 are all 3 m. For this reason, the horizontal length of the site required for assembling the base rod 1 is about 3 m. According to the method for assembling the pedestal 1 according to the present embodiment, the space required for assembling the pedestal 1 can be reduced.

  In addition, the order of step ST1 to step ST7 is not restricted to the order mentioned above, It can replace suitably. However, step ST2 is before step ST4. Step ST3 is before step ST6. Step ST1 is before step ST7. For example, step ST2, step ST4, step ST3, step ST5, step ST6, step ST1, and step ST7 may be performed in this order. In addition, the target to be lifted in step ST4 is not necessarily the tip unit 3, but may be the base unit 2.

  In addition, arrangement | positioning of the bolt joint 9 and the pin joint 6 may be changed suitably. For example, the arrangement of the bolt joint 9 and the pin joint 6 is changed according to the length of the base bar 1 and the weight of the constituent material 102 of the tower 10. For example, the first joint J1, the second joint J2, and all the third joints J3 may be bolt joints 9, and the first joint J1, the second joint J2, and all the third joints J3 are pin joints 6. There may be.

  Note that the base attachment 22 does not necessarily include the attachment hole 23. For example, the base attachment 22 may include a connecting member protruding in the X direction instead of the attachment hole 23. In such a case, the connection member provided in the base attachment 22 may be inserted into the attachment hole provided in the attachment fitting 5. However, the position of the connecting member provided in place of the mounting hole 23 is a position away from the center line L1 in the same manner as the position of the mounting hole 23.

  As described above, the base bar 1 includes the base unit 2, the tip unit 3, and the plurality of intermediate units 4. The base unit 2 includes a base attachment 22 attached to the inside of the main pillar 101 of the steel tower 10, and a base body 21 that can rotate with the base attachment 22 around a rotation axis Ax passing through the base attachment 22 along the horizontal direction. Have. A support wire 72 is attached to the tip unit 3. The intermediate unit 4 is a member for connecting the base unit 2 and the tip unit 3. The main pillar material 101 is inclined such that the upper end portion is located inside the steel tower 10 from the lower end portion. The rotation axis Ax is located on the main column member 101 side with respect to the center line L1 that passes through the center of gravity GP2 of the base body 21 and extends in the longitudinal direction of the base body 21. In the intermediate unit 4 adjacent to the base unit 2, the width in the direction perpendicular to both the rotation axis Ax and the center line L1 (Y direction) decreases toward the base unit 2 side.

  Thereby, even if the angle which the base 1 makes with respect to a horizontal surface becomes large, the base 1 is hard to contact the main pillar material 101. FIG. In other words, even if the angle formed by the pedestal 1 with respect to the horizontal plane is the upper limit angle in the prior art (the angle when the pedestal contacts the main column material), the pedestal 1 and the main column material 101 There is a gap between them. Therefore, the base 1 can increase the range in which the transported member can move.

  Further, since the rotation axis Ax is positioned on the main column member 101 side with respect to the center line L1, the boundary portion between the base unit 2 and the intermediate unit 4 is located at the main column member prior to the lower end of the base unit 2. There is a possibility of touching 101. In contrast, in the present embodiment, the width of the intermediate unit 4 adjacent to the base unit 2 is reduced toward the base unit 2. Thereby, even if the angle which the base bar 1 makes with respect to a horizontal surface becomes large, the boundary part between the base unit 2 and the intermediate unit 4 does not contact the main pillar material 101 easily. Therefore, the base 1 can increase the range in which the transported member can move.

  Further, in the bar 1, the distance D1 from the center line L1 to the rotation axis Ax is the minimum width (width D3) of the base body 21 in the direction (Y direction) orthogonal to both the rotation axis Ax and the center line L1. Less than half.

  Thereby, the bending moment which arises in the base attachment 22 when the base 1 is attached to the steel tower 10 is suppressed. Therefore, damage to the base attachment 22 is further prevented.

  Further, in the base rod 1, the base body 21 includes four main members 211. The four main members 211 are arranged at the apexes of the squares 29 as viewed from the longitudinal direction (Z direction) of the base body 21.

  Thereby, compared with the case where the base body 21 is composed of the three main members 211, the strength of the base unit 2 is easily improved, while the center line L1 is far from the main column member 101. For this reason, when the rotation axis Ax overlaps the center line L1 as in the prior art, the base bar 1 is likely to come into contact with the main pillar material 101. On the other hand, the rotation axis Ax is located on the main column member 101 side with respect to the center line L1 and the four main members 211 are arranged at the apex of the square 29, so that the strength of the base unit 2 can be improved. The expansion of the range in which the transport member can move is compatible.

(Modification)
FIG. 31 is a front view showing a base unit according to a modification. The base unit 2A of the base rod 1A according to the modification includes a base attachment 22A different from the base attachment 22 of the above-described embodiment. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The base attachment 22A is a plate-like member having a mounting hole 23A along the X axis. As shown in FIG. 31, the mounting hole 23A is separated from the center line L1 in the Y direction. The distance D1A from the center line L1 to the mounting hole 23A is larger than half of the width D3 and smaller than half of the width D2. Thereby, compared with embodiment mentioned above, it becomes easy to produce a clearance gap between 2 A of base units and the main pillar material 101. FIG. For this reason, the movable range of the tip unit 3 is increased.

DESCRIPTION OF SYMBOLS 1, 1A Pole 10 Steel tower 101 Main pillar material 101a Corner part 102 Constituent material 2, 2A Base unit 21 Base body 211 Main material 212 Diagonal material 22, 22A Base attachment 23, 23A Mounting hole 3 Tip unit 31 Tip body 311 Main Material 312 Diagonal material 32 Tip attachment 321 Fixed portion 322 Shaft 323 Nut 324 Rotating portion 3241 Wing 325 Sleeve 326 Bearing 329 Flange 4, 4a, 4b Intermediate unit 40 Intermediate unit pair 41 Intermediate body 411 Main material 412 Oblique material 5 Mounting bracket 51 Inner Plate 511 Bolt 512 Nut 52 Outer plate 521 Eye bolt 522 Nut 54 Base bar connecting portion 541 Bolt 542 Nut 543 Hold plate 545 Connecting member 546 Nut 55 Pulley connecting portion 553 Hold plate 55 Bolt 556 Nut 6 Pin joint 61 Male member 61h Hole 62 Female member 62h Hole 64 Pin 641 Base 642 Detent 643 Taper 644 Hole 65 Lock pin 71 Lift wire 72 Support wire 75 Wire 81, 82, 83 Pulley 9 Bolt joint 91 Bolt 92 Nut Ax Rotating shaft GP2, GP3, GP4 Center of gravity J1 First joint J2 Second joint J3 Third joint L1 Center line L2 Straight line

Claims (3)

A base unit attached to the inside of the main pillar material of the steel tower, and a base unit having a base body that can rotate with the base attachment around a rotation axis along a horizontal direction passing through the base attachment;
A tip unit to which a support wire is attached;
A plurality of intermediate units for connecting the base unit and the tip unit;
With
The main pillar material is inclined so that the upper end portion is located inside the steel tower from the lower end portion,
The rotation axis is located on the main column member side with respect to a center line passing through the center of gravity of the base body and along the longitudinal direction of the base body,
In the intermediate unit adjacent to the base unit, a width in a direction perpendicular to both the rotation shaft and the center line is reduced toward the base unit side. The pedestal according to claim 1, wherein a distance from the center line to the rotation axis is equal to or less than a half of a minimum width of the base body in a direction orthogonal to both the rotation axis and the center line. The base fuselage comprises four main materials,
The pedestal according to claim 1 or 2, wherein the four main members are respectively arranged at the apexes of a square when viewed from the longitudinal direction of the base body.

Images