JP2011162949A - Blocking device for hollow column, and method of blocking hollow column using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an object from falling downward by receiving the object falling from the upper side in a hollow column. <P>SOLUTION: To further reinforce the near-earth portion of the hollow column 101 by a plurality of reinforcing rings 11, after a reinforcement assembly 98 comprising a plurality of reinforcement bar-like members formed of aramid rods 3 and PC steel wires 5 is lifted upward, a blocking device 1 is installed on the lower side of the reinforcement assembly 98 and on the upper side of a side opening 101a. The movements of the upwardly lifted reinforcement assembly 98 and the components of the reinforcement assembly are supported by the blocking device 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hollow column obturator for securing a working space in a hollow column, for example, in a hollow column such as a steel pipe column or a concrete electric column, the lower portion of which is buried in the ground and standing on the ground. The present invention relates to a hollow column closing method using the closing tool.

  Steel pipe columns, concrete electric poles, and the like are usually hollow hollow columns, that is, hollow cylindrical hollow columns, and a predetermined length portion of a base end portion thereof is buried in the ground and is erected on the ground. When such an existing hollow column is reinforced, for example, a side opening is formed on the side surface about 1 m above the boundary part between the underground part buried in the ground and the ground part standing on the ground. However, a plurality of reinforcing rod-like members are inserted into the hollow pillars from the side openings to reinforce (Patent Document 1).

  More specifically, in the hollow column, the guide rod is fixedly erected along the central axis of the hollow column. The evenly arranged jig is held so as to be movable in the vertical direction around the guide rod, and the plurality of evenly arranged jigs are arranged evenly at equal angles in the circumferential direction of the hollow column. A reinforcing assembly is provided, in which a plurality of reinforcing rod-shaped members and a uniform arrangement jig are integrally formed. And the ground part of a hollow pillar is reinforced by this reinforcement assembly.

JP 2007-77613 A

  In order to reinforce the relatively weak ground part of the hollow column in this way, in addition to the above-described reinforcement assembly, it is proposed to insert a reinforcing member such as a reinforcement ring inside the ground part of the hollow column. Has been. The work of reinforcing a reinforcing member such as a reinforcing ring by inserting it into the ground portion of the hollow column has been conventionally performed by a reinforcing assembly comprising a plurality of reinforcing rod-shaped members and a uniform arrangement jig on the ground portion of the hollow column. This is done after providing a solid. For this reason, when performing reinforcement work such as inserting a reinforcing member such as a reinforcement ring in the ground part, the reinforcement assembly is moved upward from the ground part of the hollow column to be temporarily reinforced. Reinforcing work is performed after the reinforcing assembly is temporarily fastened and fixed with a string or the like so that there is no obstacle to the reinforcing work at the ground part to be reinforced.

  However, in the reinforcement work, the reinforcement assembly or the like that is moved upward and temporarily fixed moves downward, and the reinforcement assembly interferes with the reinforcement work performed in the hollow column from the side opening. It was thought that troubles such as becoming would occur.

  The present invention has been made in view of the above, and an object of the present invention is to provide a hollow column obturator for receiving the movement of a reinforcing body such as a reinforcing assembly or a reinforcing bar-like member from above in the hollow column, and An object of the present invention is to provide a method for closing a hollow column using an obturator.

  In order to achieve the above object, the hollow column obturator according to claim 1 is provided in order to secure a working space provided in the hollow column with the lower part buried in the ground and standing on the ground. A hollow column obturator installed above the obstruction having an outer diameter smaller than the inner diameter of the hollow column and closing the upper portion of the work space; and the obturator in the hollow column above the work space. And a fixing means for temporarily fixing to the gist.

  According to the first aspect, since the closing means closes the inside of the hollow column above the work space, entry of a reinforcing body or the like into the work space is prevented.

  The obturator for a hollow column according to claim 2, wherein the closing means includes an annular member having an outer diameter smaller than the inner diameter of the hollow column, and a closing portion formed by disposing a rod-like member inside the annular member. It is summarized as having.

  According to a second aspect of the present invention, the closing means has an annular member having an outer diameter smaller than the inner diameter of the hollow column, and a closing portion formed by disposing a rod-like member inside the annular member.

  The hollow column obturator according to claim 3 is a closing method using the hollow column obturator according to claim 1, wherein a reinforcing body reinforcing body for reinforcing the hollow column in the work space of the hollow column is provided from the work space. Is temporarily fixed after moving upward, and the obturator is inserted into the hollow column below the reinforcing body and above the work space, and the inserted obturator is set horizontally in the hollow column. Then, fix it temporarily.

  According to claim 3, the reinforcing body that obstructs the work is moved upward from the work space, and then the closing means is temporarily installed above the work space to close the inside of the hollow column. Intrusion into the work space is prevented.

  Thereby, in order to install the obturator made of an annular member horizontally above the work space in the hollow column, even if there is a fallen object from above the work space in the hollow column, the fallen object is received by the closing part, Prevent falling objects from falling into the work space.

  In addition, the closed portion is disposed at predetermined narrow intervals vertically and horizontally inside the annular member, and each end has a plurality of rod-like members fixedly attached to the inner peripheral portion of the annular member.

  As a result, the closed portion is composed of a plurality of rod-like members arranged at predetermined narrow intervals vertically and horizontally inside the annular member, so that the fallen objects from above the work space in the hollow column are arranged at narrow intervals. In addition, it is received by a plurality of bar-shaped members and prevents the fallout from descending into the work space.

  The fixing means ties a plurality of ropes to each portion of the rod-shaped member closest to a plurality of portions obtained by dividing the circumference of the annular member substantially equally at three or more equal angles, and the plurality of ropes are connected to the work space. From the opening formed in the hollow column above, the outside of the hollow column is taken out and fixed to the external fixing portion.

  As a result, a rope is tied to a rod-like member close to a portion where the periphery of the annular member is equally divided, and this rope is made of a rod-like member to be taken out of the hollow column above the work space and fixed to the external fixing portion. The blocking portion reliably receives the fallen object from above the hollow column.

  In addition, the end portion of the rope connected to each part of the rod-shaped member is made of a vinyl rope, and a stainless steel wire rope is tied to this vinyl rope, and this stainless steel wire rope is taken out from the opening formed in the hollow column to the outside. It is fixed to the fixed part.

  In this way, a stainless steel wire rope is tied to the vinyl rope tied to the rod-shaped member, and this stainless steel wire rope is taken out from the opening of the hollow column and fixed to the external fixing portion. Take out and pull up easily.

  Also, an object that hinders work in the work space of the hollow column, specifically, moves upward from the work space while lifting the reinforcing body upward, and temporarily fixes the moved object. The obturator is inserted into a hollow column below the work space, and the inserted obturator is set horizontally in the hollow column and then temporarily fixed.

  As a result, the object that hinders the work in the work space of the hollow pillar is moved upward while being lifted and removed, and the obturator is inserted above the work space on the lower side of the moved reinforcing body and the like. Even if there is a fallen object from above the work space in the hollow column, the fallen object is received by the closing part of the obturator to prevent the fallen object from descending to the work space.

  In addition, while lifting the reinforcing body or the like upward in the work space of the hollow column, the work moves upward from the work space, and is temporarily fixed above the moved, and the periphery of the annular member of the obturator is divided into three or more equal parts. A plurality of ropes are respectively tied to each part of the rod-shaped member closest to a plurality of points divided substantially equally at angles, and at least two of the tied ropes are left outside the side openings of the hollow columns. In this state, the remaining rope was inserted into the hollow column from the side opening of the hollow column, and then passed through a hole formed at a predetermined position above the side opening of the hollow column and was taken out to the outside. In this state, the obturator is inserted into the hollow column from the side opening of the hollow column, the obturator inserted from the side opening is set horizontally in the hollow column, and the rope penetrating the hole is pulled upward. And the small amount left outside the side opening Pulling the two ropes upward outside the side openings is performed equally for all ropes while maintaining the level of the obturator, and the obturator is installed horizontally in the hollow column above the work space. All the ropes pulled upward are tied and fixed to the fixing part outside the hollow column.

  As a result, the reinforcing body is moved upward while being lifted upward in the work space of the hollow column, and a rope is tied to a rod-like member adjacent to a portion where the periphery of the annular member is equally divided, and the rope is connected to the side portion above the work space. The obturator is set horizontally above the work space in the hollow column and fixed to the outside while pulling out from the hole above the opening and the side opening to the outside of the hollow column. Even if there is a fallen object, the fallen object is received by the closing part of the obturator to prevent the fallen object from descending to the work space.

  According to the present invention, since the obturator made of an annular member having a closing portion is installed above the work space in the hollow column, even if there is a fall from above the work space in the hollow column, this fall object Can be received by the closed portion to secure a working space.

  According to the present invention, the reinforcement assembly, which is an object that hinders work in the work space of the hollow pillar, is moved upward while being lifted, and the obturator is inserted below the moved object and above the work space. Therefore, even if there is a fallen object from above the work space in the hollow column, the fallen object can be received by the closing part of the obturator and the work space can be secured.

It is explanatory drawing which shows the state which is applying the obstruction | occlusion tool of the hollow pillar concerning one Embodiment of this invention to hollow pillars, such as a steel pipe pillar and a concrete electric pole, and is reinforcing the ground part of a hollow pillar. It is the top view and side view which show the structure of the obturator 1 shown in FIG. It is a figure which shows the state which attached the stainless steel wire rope which has suspended the obturator to the iron pipe for scaffolds built in the circumference | surroundings of the hollow pillar. It is a figure which shows the state which is going to insert an obturator in a hollow pillar from side part opening. It is a figure which shows the state by which the obturator inserted from the side part opening of the hollow pillar was set horizontally below the reinforcement assembly like FIG. It is a figure which shows the state which attached the protection arm assembly to the guide rod below the hollow column in the state where the obturator is set horizontally on the lower side of the reinforcement assembly as shown in FIG. FIG. 7 is a perspective view showing a protective arm assembly attached to a guide rod below a hollow column as shown in FIG. 6 in a state where the retractable arm extends and expands. FIG. 7 is a perspective view showing the protective arm assembly attached to the guide rod below the hollow column as shown in FIG. 6 in a state where the retractable arm is retracted and deflated. It is a figure which shows the state by which six reinforcement rings were arrange | positioned in the ground part of the hollow pillar. It is explanatory drawing which shows the state which reinforced the ground part of the hollow column firmly with the reinforcement assembly and the some reinforcement ring.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  FIG. 1 shows a state in which a hollow column obturator according to an embodiment of the present invention is applied to a hollow column 101 such as a steel pipe column or a concrete electric pole, and a reinforcing work is being performed on the ground portion of the hollow column 101. It is explanatory drawing shown.

  In FIG. 1, in order to reinforce the ground portion of the hollow column 101, a reinforcing assembly 98 composed of a plurality of reinforcing rod-shaped members composed of an aramid rod 3 and a PC steel wire 5 is provided with a stainless wire rope 27. It shows a state in which it is pulled upward and is temporarily fixed.

  More specifically, the reinforcing assembly 98 includes a plurality of reinforcing rod-shaped members made of the aramid rod 3 and the PC steel wire 5 arranged along the longitudinal direction of the hollow column 101 and the central axis of the hollow column 101. A plurality of rod placement spacers 7 that are equally arranged jigs are fixedly fixed so as to be equally arranged at equal angles in the circumferential direction of the hollow column 101 around a guide rod 13 that will be fixedly set later. The whole of the plurality of reinforcing rod-shaped members thus held is surrounded by a plurality of vinyl bands 9 and fastened to be fixed together.

  Note that the reinforcing assembly 98 and the aramid rod 3, the PC steel wire 5, the rod arrangement spacer 7, the guide bar 13 and the like constituting the reinforcing assembly 98 each function as a reinforcing body.

  Thus, the reinforcement assembly 98 integrally assembled in the hollow column has two vinyl ropes 25 attached to the uppermost rod arrangement spacer 7 in a loop shape. Two stainless steel wires 27 are respectively connected to the upper ends, and the two stainless steel wires 27 are taken out from the inside of the hollow pillar 101 through the two wire passage holes 29 formed above the hollow pillar 101, The entire reinforcing assembly 98 is pulled upward by pulling the two stainless steel wires 27 taken out to the outside in the direction indicated by the arrow 100.

  More specifically, the reinforcing assembly 98 includes a hollow column on a side surface approximately 1 m above the working space around the ground portion where the hollow column 101 is reinforced, specifically, the ground portion of the hollow column 101. For example, a side opening 101a having a width of about 55 mm and a length of about 400 mm formed along the longitudinal direction of the base 101 is pulled upward from the work space below. Since the place below the side opening 101a that has been evacuated by pulling up the reinforcing assembly 98 in this manner is a working space centering on the ground part where the hollow column 101 is reinforced, the reinforcement work is hindered. When the reinforcement work is performed, it is required that there is no reinforcement body such as the reinforcement assembly 98.

  In FIG. 1, a guide bar 13 is disposed so as to extend on the central axis of the hollow column 101 from the lowest end of the bottom of the hollow column 101 to the side of the side opening 101 a. A guide bar fixing jig 15 is attached to the lower end of the guide bar 13. The guide bar fixing jig 15 is for fixing the guide bar 13 to the central axis of the hollow column 101 and is attached to the lower end of the guide bar 13. The guide rod 13 is fixed to the central axis of the hollow column 101 at the bottom of the hollow column 101 by being inserted into the hollow column 101 later.

  Further, a stopper 17 composed of a high nut or a short pipe is fixedly attached above the guide rod fixing jig 15 of the guide rod 3, and this stopper 17 will be described later. As shown in FIG. 10, the lowermost rod arrangement spacer 7 among the plurality of rod arrangement spacers 7 holding the plurality of reinforcing rod-shaped members of the reinforcement assembly 98 is received and fixed at this position. And the entire reinforcement assembly 98 is supported at this position.

  As described above, after the reinforcing assembly 98 or the like that hinders the reinforcing work is moved upward to provide a working space centered on the ground portion, the guide working for fixing the guide rod is provided in the empty working space. Only the guide bar 13 whose lower end is fixed to the central axis of the hollow column 101 with the tool 15 remains.

  In order to reinforce the ground portion of the hollow column 101 after moving the reinforcing assembly 98 or the like that hinders the reinforcement work upward to make the work space including the periphery of the ground portion empty except for the guide rod 13. As shown in FIG. 1, a plurality (six in this embodiment) of reinforcing rings 11 are inserted into the hollow pillar 101 from the side opening 101a. In FIG. 1, among the six reinforcing rings 11, the first reinforcing ring 11 has already been inserted into the ground portion, and the second reinforcing ring 11 is being inserted from the side opening 101a, and the remaining The four reinforcing rings 11 are still outside.

  FIG. 10 shows that the six reinforcing rings 11 described above are inserted into the ground portion of the hollow column 101 for reinforcement, and then the reinforcing assembly 98 that has been lifted upward as shown in FIG. FIG. 6 is a view showing a state in which the ground portion of the hollow column 101 is firmly reinforced by the reinforcing assembly 98 and the plurality of reinforcing rings 11.

  In FIG. 10, six reinforcing rings 11 are arranged along the inner peripheral surface of the hollow column so as to surround the periphery of the reinforcing assembly 98 made of a plurality of reinforcing rod-shaped members at the ground portion of the hollow column 101. These are arranged in close contact with each other so as to cover a predetermined region centered on the ground portion to be reinforced. The reinforcing assembly 98 that has been lifted upward is lowered downward so as to penetrate the inside of the six reinforcing rings 11 in the ground portion, and the rod placement spacer 7 at the lowermost end contacts the stopper 17. 10, the ground portion of the hollow column 101 is firmly reinforced by the reinforcing assembly 98 and the six reinforcing rings 11.

  In FIG. 10, a guide bar fixing jig 19 is provided at the upper part of the reinforcing assembly 98. The guide bar fixing jig 19 has a guide bar 13 inserted in the center thereof. Thus, the guide bar 13 is aligned with the central axis of the hollow column 1 even in the vicinity of the side opening 1a.

  Returning to FIG. 1, in a state where the reinforcing assembly 98 is pulled upward, the reinforcing ring 11 or the like is inserted from the side opening 101 a into the ground portion of the hollow column 101 below the reinforcing assembly 98 to perform the reinforcing work. Prior to this, the obturator 1 is installed directly below the reinforcing assembly 98 and above the side opening 101a, that is, above the working space in the hollow column 101 where the reinforcing work is performed. The obturator 1 is suspended from three vinyl ropes 103 from above and temporarily fixed. In FIG. 1, the three vinyl ropes 103 are shown with only a part of the tip tied to the obturator 1, and the others are omitted for simplification of the drawing.

  Specifically, as shown in FIGS. 2 (a) and 2 (b), the obturator 1 includes an annular member 1a and a plurality of rod-like members that constitute an obstructing portion disposed vertically and horizontally inside the annular member 1a. 1b. The annular member 1 a has an outer diameter smaller than the inner diameter of the hollow column 101, and when inserted into the hollow column 101, the annular member 1 a is horizontal in the hollow column 101 so that its outer peripheral portion is along the inner periphery of the hollow column 101. Is provided. In addition, the plurality of rod-shaped members 1b arranged vertically and horizontally are fixedly attached to both inner ends of the annular member 1a.

  The annular member 1a and the rod-like member 1b constituting the obturator 1 are preferably metallic, and in this case, both ends of each rod-like member 1b are preferably welded to the inner peripheral surface of the annular member 1a. However, the present invention is not limited to this. Further, in the present embodiment, the closing portion is composed of the rod-shaped member 1b, but is not limited to this, and is only required to receive the fallen object, and is, for example, stretched inside the annular member 1a. A plate-like member such as an iron plate may be used.

  The vinyl rope 103 is attached in three loops to the bar-shaped member 1b of the obturator 1 and the vinyl rope 103 constituting the loop-shaped portion is covered with a vinyl tape 105 and the vinyl rope 103 is covered with the vinyl rope 103. The tape 105 is connected to the stainless wire rope 107. The three vinyl ropes 103 are respectively connected to the respective portions of the rod-like member 1b closest to the three portions obtained by dividing the circumference of the annular member 1a into three equal parts at almost equal angles. When the obturator 1 is suspended by the vinyl rope 103, the obturator 1 is horizontal. The number of vinyl ropes 103 is not limited to three, and may be four or six as long as it is one or more, and three are preferable for stable holding.

  As described above, the three vinyl ropes 103 attached to the obturator 1 in a loop shape and the three stainless steel wire ropes 107 connected to the vinyl rope 103 are pulled upward. As shown in FIG. 3, the scaffold 1 is attached to the scaffolding iron pipe 111 assembled for the work of the hollow column around the hollow column 101, whereby the obturator 1 is attached as shown in FIG. 1. It is temporarily fixed horizontally to the upper part of the side opening 101a directly below the reinforcing assembly 98 pulled upward, that is, above the working space for reinforcement. By providing the obturator 1 above the work space in this way, even if the reinforcing assembly 98 pulled up upward or a part of the members of the reinforcing assembly 98 is lowered, the lowered object is not obstructed by the obstructing portion of the obturator 1. Is received by the rod-shaped member 1b that constitutes, and does not descend into the work space. The vinyl rope 103, the stainless wire rope 107, and the iron pipe 111 for scaffolding constitute the fixing means of the present invention.

  Further, as can be seen from FIG. 3, two of the three stainless wire ropes 107 attached to the obturator 1 via the three vinyl ropes 103 are drawn upward from the side opening 101a, and the scaffold The remaining one stainless steel wire rope 107 passes through a drain hole 113 formed slightly above the side opening 101a of the hollow column and comes out to the outside. After that, it is attached and fixed to the iron pipe 111 for scaffolding.

  Further, in FIG. 1, a protective arm assembly 31 is attached to the guide bar 13 provided below the hollow column 101. This protective arm assembly 31 is enlarged in FIGS. As shown in FIG. 7, the two center portions 31a and 31b through which the guide rod 13 is inserted and the center portions 31a and 31b extend toward the inner peripheral surface of the hollow column 101 as shown in FIG. It is composed of three retractable arms 33 that are spaced apart from the inner peripheral surface of the pillar 1 and are substantially parallel to the guide rod 13 and retract and contract as shown in FIG.

  A hexagonal high nut 35 is inserted through the guide bar 13 below the lower central portion 31b of the protective arm assembly 31, and a hexagonal high nut is mounted on the upper central portion 31a. A weight 37 made of is inserted through the guide bar 13 and attached, and a hexagonal high nut 39 is inserted through the guide bar 13 and attached a little above the weight 37.

  The high nut 39 can be screwed with a worm screw 41, and the high nut 39 can be fixed to the guide rod 13 by screwing and tightening the worm screw 41. Yes. The weight 37 is used to extend and expand the retractable arm 33 toward the inner peripheral surface of the hollow column 1 by applying the weight of the weight 37 to the upper center portion 31a as shown in FIG. is there.

  The lower end of the wire 43 is attached to the high nut 35 below the central portion 31 b of the protective arm assembly 31, and the upper end of the wire 43 is attached to the upper high nut 39. The lower end of another wire 45 is also attached to the central portion 31 a of the protective arm assembly 31, and the upper end of the wire 45 is formed in a loop shape and hooked on the guide rod 13 protruding above the high nut 39. It has been.

  By pulling the wire 45 upward, the upper center portion 31a is pulled upward against the weight of the weight 37, and the retractable arm 33 can be retracted and squeezed as shown in FIG.

  The protective arm assembly 31 configured as described above and extending and expanding in the hollow column 101 as shown in FIG. 1 or FIG. 7 has a side opening 101a of the hollow column 101 as shown in FIG. The reinforcing ring 11 is attached to the guide rod 13 in order to prevent the reinforcing ring 11 from descending to the bottom below the hollow column 101 in the operation of inserting the reinforcing ring 11 into the hollow column 101.

  That is, as shown in FIG. 1, in a state where the protection arm assembly 31 is attached to the guide rod 13 and set at a position slightly below the ground portion of the hollow column, the reinforcing ring 11 is placed on the side of the hollow column. If the reinforcing ring 11 is inadvertently lowered during the operation of being inserted into the hollow column from the opening 101a, the lowered reinforcing ring 11 is caused by the expansion of the protective arm assembly 31 that is expanded. It will be received by the free arm 33 and can be prevented from descending to the bottom of the hollow column.

  The reinforcing ring 11 that has been lowered to the bottom of the hollow column cannot be easily picked up. However, when the reinforcing ring 11 is received by the retractable arm 33 of the protective arm assembly 31, for example, from the side opening 101a to the tip Inserts a hook-like long rod and hooks it on the hook portion, or pulls up the wire 43 attached to the high nut 35 of the protective arm assembly 31 to recover the lowered reinforcing ring 11. Can do.

  In order to attach the protective arm assembly 31 for receiving the lowered reinforcing ring 11 to the guide rod 13 below the hollow column 101 as shown in FIG. 1, the retractable arm 33 of the protective arm assembly 31 is shown in FIG. As shown in the figure, it is retracted and squeezed, and in this squeezed state, it is inserted into the hollow column 101 from the side opening 101a, and the high nut 35 of the protective arm assembly 31 is located in the vicinity of the side opening in the hollow column. The guide bar 13 is inserted sequentially into each part such as the parts 31a and 31b, the weight 37, and the high nut 39. When the guide rod 13 is inserted into the protective arm assembly 31, the protective arm assembly 31 is lowered downward in the hollow column along the guide rod 13 while being in its deflated state, as shown in FIG. When the position of the hollow column reaches a position slightly lower than the ground portion, the retractable arm 33 is set in an open state as shown in FIG. 7, and in this state, the upper high nut 39 is screwed. At 41, it is temporarily fixed by being attached to the guide bar 13.

  4, as described above, the reinforcing assembly 98 is pulled upward with the guide rod 13 left below the hollow column 101, so that the work space centering on the ground portion is empty except for the guide rod 13. This shows a state in which the obturator 1 is about to be inserted into the hollow column 101 from the side opening 101a after being in place.

  As shown in the figure, the obturator 1 is inserted into the hollow column from the side opening 101a of the hollow column 101 while standing upright. In this case, the stainless steel connected to the three vinyl ropes 103 is inserted into the hollow column. One of the wire ropes 107 passes through the drain hole 113 formed slightly above the side opening 101a of the hollow column and is taken out to the outside, and then attached to the scaffolding iron pipe 111 as described above. The remaining two stainless wire ropes 107 are outside the side opening 101a and are attached to the scaffolding iron pipe 111 as described above outside the side opening 101a.

  As shown in FIG. 4, the obturator 1 is inserted into the hollow column 101 from the side opening 101 a and then pulled up by the three stainless wire ropes 107, and the side opening 101 a directly below the reinforcing assembly 98. As shown in FIG. 5, it is fixed horizontally at the top of the upper portion, that is, above the working space for reinforcement.

  As shown in FIG. 5, the reinforcing assembly 98 is lifted upward with the guide rod 13 left below the hollow column 101, and the obturator is placed above the work space centered on the empty space. After 1 is set to be horizontal, as shown in FIG. 6, the protective arm assembly 31 is inserted into the lower guide bar 13 as described above. Thus, after the obturator 1 is put above the work space and the protective arm assembly 31 is inserted into the lower guide rod 13, a plurality of, that is, six reinforcements in this embodiment, as shown in FIG. The ring 11 is inserted into the hollow column 101 from the side opening 101a.

  As shown in FIG. 1, the reinforcing ring 11 is inserted from the side opening 101a while standing the reinforcing ring 11 and is returned to the horizontal after entering the hollow column 101. While hanging, it is set at the ground part of the hollow column. In this way, the six reinforcing rings 11 inserted into the hollow column 101 from the side openings 101a are arranged along the inner peripheral surface of the hollow column 101 at the ground portion of the hollow column 101, as shown in FIG. As described above, they are arranged in close contact with each other so as to cover a predetermined area centered on the ground portion to be reinforced.

  In addition, after the six reinforcing rings 11 are arranged in close contact with the ground portion in this way, the protective arm assembly 31 is pulled upward from the guide bar 13 and taken out from the side opening 101a, Although removed from the portion, FIG. 9 shows a state in which the protective arm assembly 31 has been removed.

  After the six reinforcing rings 11 are closely arranged on the ground part in this way, the reinforcing assembly 98 is lowered downward so as to penetrate the inside of the six reinforcing rings 11 on the ground part, As shown in FIG. 10, the lowermost rod arrangement spacer 7 is fixed to the position of FIG. 10 by abutting against the stopper 17, whereby the reinforcing assembly 98 and the six reinforcing rings 11 are used to fix the hollow column 101. Reinforce the ground part firmly.

  Next, the series of operations described above will be described in order. First, a plurality of reinforcing rod-shaped members composed of an aramid rod 3 and a PC steel wire 5, a plurality of rod arrangement spacers 7 that uniformly hold the plurality of reinforcing rod-shaped members, and a plurality of reinforcing rod-shaped members are surrounded. It is assumed that the reinforcing assembly 98 composed of a plurality of vinyl bands 9 that are fastened and fixed is already incorporated in the ground portion.

  Since the reinforcement assembly 98 incorporated in the ground portion in this way is an obstacle to the reinforcement work performed on the ground portion, as shown in FIG. Is also moved upward and removed, and temporarily fixed above the moved position.

  After the reinforcing assembly 98 is moved upward in this way and the working space centering on the ground portion to be reinforced becomes a void except for the guide rod 13, the obturator 1 is shown in FIG. 3 is inserted into the hollow column 101 through the side opening 101a and attached to the scaffolding iron pipe 111 while being suspended horizontally by the stainless wire rope 107 as shown in FIG. As shown in FIG. 5, the obturator 1 is horizontally installed above the side opening 101a, that is, above the working space in the hollow column 101 where the reinforcing work is performed.

  As shown in FIG. 5, after the obturator 1 is horizontally installed above the work space, the protective arm assembly 31 is inserted into the guide rod 13 below the hollow column 101 as shown in FIG. 6. After the protection arm assembly 31 is inserted into the guide bar 13, as shown in FIG. 1, six reinforcing rings 11 are inserted into the hollow column 101 from the side openings 101a one by one in order.

  In such an insertion operation of the reinforcing ring 11, even if the reinforcing assembly 98 temporarily lifted upward or some of the components are temporarily lowered, the lowered object is blocked by the obstruction provided above the work space. It is received by the tool 1 and does not descend into the work space, and the insertion work of the reinforcing ring 11 can be performed safely.

  After the six reinforcing rings 11 are inserted into the hollow column from the side opening 101a, the protective arm assembly 31 inserted into the guide rod 13 below the hollow column 101 is lifted upward, and the side opening 101a Remove to the outside. The protection arm assembly 31 is pulled up by removing the screw 41 and pulling the wire 43 upward from the side opening 101a. When the protective arm assembly 31 is removed from the hollow column, as shown in FIG. 9, six reinforcing rings 11 are attached to the ground portion of the hollow column, thereby further strengthening the ground portion of the hollow column. Reinforced.

  Six reinforcing rings 11 are provided on the ground portion, and after the protective arm assembly 31 is removed, the obturator 1 remaining in the hollow column 101 is removed from the hollow column 101 as shown in FIG. . The removal of the obturator 1 is achieved by performing the operation described in FIG. 4 in reverse.

  That is, after loosening the stainless wire rope 107 of the obturator 1 set horizontally as shown in FIG. 9, the side opening 101a is pierced from the inside while standing upright as shown in FIG. What is necessary is just to pull out the stainless steel wire rope 107 from the drain hole 113 finally at the outside.

  When the obturator 1 is removed from the hollow column 101 as described above, the six reinforcing rings provided on the ground portion as described above are provided in the work space centered on the ground portion below the side opening 101a. 11 and the guide rod 13 remain, and the reinforcement assembly 98 is suspended by the stainless steel wire 27 above the work space. Next, the stainless steel wire 27 is loosened and the reinforcement assembly 98 is gradually moved downward. 10, while further penetrating the inside of the six reinforcing rings 11, the rod assembly spacer 98 is lowered further downward, and the rod arrangement spacer 7 at the lowermost end of the reinforcing assembly 98 abuts against the stopper 17, so that the reinforcing assembly 98 is shown in FIG. 10. Thus, the ground portion of the hollow column 101 is reinforced by the reinforcing assembly 98 and the six reinforcing rings 11. Then, the stainless steel wire 27 and the vinyl rope 25 that finally suspended the reinforcing assembly 98 are unwound and removed, thereby completing all operations.

  In the above embodiment, the reinforcing assembly 98 is moved upward, and the obturator 1 is set below the reinforcing assembly 98 moved upward. When the component member or the like is lowered, the reinforcement assembly 98 or a fallen object such as the component member is received to prevent the lowering downward, but the present invention is not limited to this, and the obturator is not limited thereto. Reference numeral 1 can receive an arbitrary fallen object and prevent the downward fall thereof.

DESCRIPTION OF SYMBOLS 1 Obturator 1a Annular member 1b Rod-shaped member 3 Aramid rod 5 PC steel wire 7 Rod arrangement spacer 9 Vinyl band 11 Reinforcement ring 13 Guide rod 15, 19 Guide rod fixing jig 27 Stainless wire 31 Protective arm assembly 33 Retractable Arm 98 Reinforcement assembly 101 Hollow column 101a Side opening 103 Vinyl rope 107 Stainless wire rope 111 Iron pipe 113 for scaffolding Drainage hole

Claims (3)

A hollow column closing tool installed above the work space in order to secure a work space provided inside the hollow column that is embedded in the ground with the lower part embedded in the ground,
A closing means having an outer diameter smaller than the inner diameter of the hollow column and closing the upper part of the working space;
A hollow column obturator comprising: a fixing means for temporarily fixing the obturator in the hollow column above the work space.   2. The hollow according to claim 1, wherein the closing means includes an annular member having an outer diameter smaller than an inner diameter of the hollow column, and a closing portion formed by disposing a rod-like member inside the annular member. Pillar obturator. A closure method using the hollow column obturator according to claim 1,
After temporarily moving the reinforcing body that reinforces the hollow column in the work space of the hollow column above the work space,
Insert the obturator into the hollow column below the reinforcement and above the working space,
A method of closing a hollow column, characterized in that the inserted obturator is set horizontally in the hollow column and then temporarily fixed.

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