JP5596530B2 - Rebar suspension bar arrangement device - Google Patents

Description

  The present invention relates to a reinforcing bar hanging reinforcement used when a reinforcing reinforcing bar is suspended from above and placed in a longitudinal slit for reinforcing bar formed by extending in a vertical direction on a wall surface of an existing reinforced concrete structure. Relates to the device.

  For example, as a method of seismic reinforcement of underground structures with reinforced concrete formed in a box culvert shape, a number of reinforcing bars are placed on the wall surface of the existing reinforced concrete structure at a predetermined pitch vertically and horizontally. A seismic reinforcement method that is buried in the thickness direction may be adopted. When reinforcing reinforcing bars are embedded in the wall surface of an existing reinforced concrete structure, a core boring hole is formed at a depth that does not penetrate the wall surface portion, and after the reinforcing reinforcing bars are disposed in each formed core boring hole, for example, A method of filling and embedding non-shrink mortar is generally employed.

  Moreover, the work of individually drilling and forming a large number of core boring holes in a wide range of wall surfaces requires a lot of labor and breaks the existing reinforcing bars arranged in existing reinforced concrete structures. Since there is a risk of damage, a vertical slit for bar arrangement is cut and formed on the wall surface of the existing reinforced concrete structure using a water jet in the vertical direction without cutting the existing reinforcing bar. Reinforcing reinforcing bars are supported by the existing reinforcing bars using the vertical slits for reinforcing bars, and then the reinforcing vertical bars are filled with mortar and concrete, and the reinforcing reinforcing bars are installed in the existing reinforced concrete structure. A method of embedding in a wall surface of an object has also been developed (see, for example, Patent Document 1).

JP-A-9-67942

  On the other hand, existing reinforced concrete structures are used as, for example, common grooves, etc., and there are cases where power cable wiring and various types of piping are arranged inside, such wiring and piping are In order to facilitate maintenance and management, for example, it is often installed in a state of being supported by a support frame and arranged in a plurality of stages along the wall surface. In such a case, for example, in a method in which a number of core boring holes are formed at predetermined pitches in the vertical and horizontal directions on the above-described wall surface portion and reinforcing reinforcing bars are disposed, wirings installed along the wall surface portion, Piping is in the way, making it difficult to install.

  On the other hand, by applying the method of cutting the vertical slits for reinforcing bar arrangement using the water jet described above, for example, via the gaps between the multiple stages of support bases that support the wirings and piping Core boring holes for inserting water jet injection nozzles are drilled at predetermined positions on the wall surface on the back side of pipes and pipes, and the water jet injection nozzles are inserted into these core boring holes so that the wall surfaces are vertically oriented. After forming a vertical slit for reinforcing bars, reinforcing reinforcing bars are placed in the vertical slit for reinforcing bars, and then mortar and concrete are filled, and the reinforcing reinforcing bars are connected to wiring and piping. A method of embedding it in the wall surface on the back side of the can be considered.

  However, in the above-described method using the core boring hole and the water jet, it is not possible to form a reinforcing bar for arranging reinforcing bars on the wall surface on the back side of the obstacle such as wirings and pipes. Although it is easy, the vertical slits for bar arrangement on the back side of obstacles such as wires and pipes are formed in places where these obstacles obstruct the worker's hands, so they are used for bar arrangement. It becomes difficult to perform the work of reinforcing reinforcing bars in the vertical slit in the vertical direction at a predetermined pitch.

  In the present invention, reinforcing reinforcing bars are smoothly placed in a vertical direction at a predetermined pitch in a vertical slit for reinforcing bars formed on a wall surface on the back side of an obstacle such as wiring or piping of an existing reinforced concrete structure. An object of the present invention is to provide a reinforcing bar hanging bar arrangement device that can be arranged in a straight line.

  In the present invention, when reinforcing reinforcing bars are suspended from above and vertically arranged at a predetermined pitch in a vertical slit for reinforcing bars formed by extending in the vertical direction on the wall surface of an existing reinforced concrete structure. Reinforcing bar suspension bar arrangement apparatus used in the present invention, a support column portion fixed in a vertically standing state, and attached to the support column portion so as to be slidable in the vertical direction. A clamp portion that can be fixed at a height position, a guide pipe portion that is gripped by the clamp portion and extends in a lateral direction toward the wall surface portion, and is guided by the guide pipe portion to a side surface toward the wall surface portion. A slide pipe portion having a double structure composed of an outer pipe and an inner pipe, which slides forward and backward in a direction. A guide pulley is provided at the outer pipe of the slide pipe portion and the tip of the inner pipe. Each installed Each of the guide pulleys is wound around each of the guide pulleys so that the pair of wire members extend from the work space in which the support pillar portion is fixed to the lower portion of the guide pulley through the hollow interior of the inner pipe. A reinforcing bar gripping portion that detachably grips the reinforcing reinforcing bar is provided at the distal end portion of the wire member on the lower portion side of the guide pulley. The above object is achieved by providing a reinforcing bar hanging bar arrangement device attached to each.

  In the reinforcing bar hanging bar arrangement apparatus according to the present invention, the support column portion includes a support column having a jack base attached to an upper end portion and a lower end portion, and the jack base is used as a bottom plate portion and a top plate portion of the work space. It is preferable that the support column is fixed to the work space in a state in which the support reaction force is obtained by pressing the support column.

  Further, in the reinforcing bar hanging bar arrangement apparatus of the present invention, the reinforcing bar gripping portion is configured to include an electromagnet and a reinforcing bar winding belt provided at a tip thereof with a metal plate that can be magnetically attached to the electromagnet. The electromagnet is wound after the reinforcing bar is suspended to a predetermined position from the state where the reinforcing bar is wound by a rebar winding belt, the metal plate is magnetically attached to the electromagnet and the reinforcing bar is gripped. It is preferable that the gripped state can be opened by turning off the power source and can be pulled up together with the wire member.

  According to the reinforcing bar hanging bar arrangement apparatus of the present invention, reinforcing reinforcing bars are placed in the vertical slits for reinforcing bars formed on the wall surface on the back side of an obstacle such as wires and pipes of an existing reinforced concrete structure. It is possible to arrange the bars smoothly in the vertical direction at a predetermined pitch.

It is a schematic sectional drawing explaining the situation where reinforcement reinforcing bars are arranged to the vertical slit for reinforcement arrangement using the reinforcing bar suspension reinforcement arrangement concerning one desirable embodiment of the present invention. 1 is a schematic cross-sectional view illustrating an existing concrete structure that is seismically reinforced by a reinforcing steel bar mounting structure according to a preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side cross-sectional view seen from a side for explaining the configuration of a reinforcing bar hanging bar arrangement according to a preferred embodiment of the present invention. (A), (b) is the schematic sectional drawing seen from the top explaining the condition which advances and retracts the guide pipe part and slide pipe part of a reinforcing bar hanging bar arrangement apparatus. (A), (b) is the schematic sectional drawing seen from the side explaining the condition which hangs down the reinforcing bar. It is the schematic top view of the clamp part which looked at Fig.7 (a) from upper direction. It is the simplified rear view of the clamp part which looked at Drawing 6 from the lower part. (A), (b) is a schematic perspective view explaining the structure of a reinforcing-bar grip part. The vertical slit for bar arrangement formed in the wall part of the back side of the obstacle by the wiring, piping, etc. of the existing reinforced concrete structure is demonstrated, (a) is the schematic front view along AA of (b) FIG. 4B is a schematic cross-sectional view taken along line BB in FIG. (A)-(d) is a schematic cross-sectional view explaining the situation where reinforcement reinforcing bars are arranged using the reinforcing bar suspension arrangement according to a preferred embodiment of the present invention.

  A reinforcing bar suspension bar arrangement apparatus 10 according to a preferred embodiment of the present invention shown in FIG. 1 is based on an existing reinforced concrete structure 20 constructed as a box culvert-shaped underground structure, for example, as shown in FIG. When performing seismic reinforcement, reinforcing reinforcing bars 11 are arranged at a predetermined pitch in the vertical direction on the wall surface portion 22 facing the ground of the upper tunnel portion 21 used as a joint groove in the reinforced concrete structure 20. It is used as a device for In the present embodiment, in the upper tunnel portion 21 used as a common groove, various wirings such as cable wiring for electric power and piping 23 are supported inside by the support frame 24 to try to strengthen the earthquake resistance. The vertical slits 25 for reinforcing bars formed in the wall surface portion 22 on the back side (FIG. 9A). , (B)), it is difficult to perform the reinforcement work of the reinforcing reinforcing bars 11 manually by the worker. The reinforcing bar hanging bar arrangement device 10 of this embodiment is reinforced smoothly in a vertical direction at a predetermined pitch in the vertical slits 25 for bar arrangement formed on the wall surface portion 22 on the back side of such wires and pipes 23. It has a function that enables reinforcing bars 11 to be arranged.

  In the present embodiment, the lower tunnel portion 26 of the existing reinforced concrete structure 20 constructed as an underground structure is, for example, a subway tunnel.

  Further, the reinforcing bar suspension reinforcing bar arrangement 10 of the present embodiment is provided for reinforcing the vertical bar 25 for reinforcing bar formed by extending in the vertical direction on the wall surface portion 22 of the existing reinforced concrete structure 20. A bar arrangement device that is used when a reinforcing bar 11 is suspended from above and arranged in a vertical direction at a predetermined pitch. A clamp portion 33 that is slidably mounted in the vertical direction and can be fixed to a predetermined height position of the support column portion 30, and a guide pipe that is gripped by the clamp portion 33 and extends laterally toward the wall surface portion 22. And a double-structured slide pipe portion 37 composed of an outer pipe 35 and an inner pipe 36 that are guided by the guide pipe portion 34 and slide back and forth in the lateral direction toward the wall surface portion 22. Yes. Guide pulleys 38 are respectively attached to the distal end portions of the outer pipe 35 and the inner pipe 36 of the slide pipe portion 37, and each of the guide pulleys 38 is wound around each of the guide pulleys 38, so that the pair of wire members 39 are connected to the inner pipe 36. From the work space 45 to which the support column 30 is fixed to the lower part of the guide pulley 38, it extends so as to be able to advance and retreat by operation from the work space 41, and the wire member 39 Reinforcing bar gripping portions 40 for detachably holding the reinforcing reinforcing bars 11 are respectively attached to the distal end portions of the guide pulley 38 on the lower portion side.

  In this embodiment, as shown in FIG. 3, the support column portion 30 constituting the reinforcing bar hanging bar arrangement device 10 includes a support column 32 having a jack base 31 attached to an upper end portion and a lower end portion. The support pillar 32 is fixed to the work space 45 in a state in which the support reaction force is obtained by pressing 31 to the bottom plate portion 21 a and the top plate portion 21 b of the upper tunnel portion 21 that forms the work space 45. As the support column 32, for example, a scaffold pipe having a diameter of about 48.6 mm can be used.

  As shown in FIGS. 6 and 7 (a) and 7 (b), the clamp part 33 constituting the reinforcing bar hanging bar arrangement apparatus 10 is, for example, a pair of pipes having vertically intersecting axes arranged in a three-dimensional intersection. The support pillar 32 is supported by the first pipe clamp portion 33a having a longitudinal axis that is formed by a known clamp member including the clamp portions 33a and 33b and that can be opened and closed by an operation from the first clamp lever 33c. The clamp portion 33 can be fixed at a predetermined height position of the column portion 30. In addition, the guide pipe portion 34 is horizontally directed toward the wall surface portion 22 by gripping the guide pipe portion 34 by the second pipe clamp portion 33b having a lateral axis that can be opened and closed by operation from the second clamp lever 33d. It can be fixed to the support pillar 30 in a state extending in the direction.

  As the guide pipe portion 34, as shown in FIGS. 3 to 5A and 5B, for example, a steel pipe pipe having a diameter of about 43 mm and a length of about 733 mm can be used. On the side surface of the guide pipe portion 34, slide handles 35 a and 36 a integrally joined to the side surfaces of an outer pipe 35 and an inner pipe 36 described later are projected along the extending direction of the guide pipe portion 34 to guide the slide movement thereof. A guide rail groove 34 a (see FIGS. 7A and 7B) is cut and formed over substantially the entire length excluding both ends of the guide pipe portion 34. The guide pipe portion 34 can appropriately adjust the separation distance from the wall surface portion 22 by adjusting the position held by the second pipe clamp portion 33 b of the clamp portion 33. A double-structured slide pipe portion 37 is mounted in the hollow interior of the guide pipe portion 34 so as to be capable of moving back and forth.

  As shown in FIGS. 3 to 5 (a) and 5 (b), the slide pipe portion 37 has a double structure including an outer pipe 35 and an inner pipe 36. As the outer pipe 35, for example, a steel pipe pipe having a diameter of about 34 mm and a length of about 753 mm can be used. The outer pipe 35 is provided with a slide handle 35a that is integrally joined so as to protrude from the side surface of the rear end portion thereof. A guide rail groove 35b (FIGS. 7A and 7B) that projects a slide handle 36a integrally joined to the inner pipe 36 on the side surface of the front portion of the slide handle 35a and guides its sliding movement. (See) is cut. As the inner pipe 36, for example, a steel pipe pipe having a diameter of about 22 mm and a length of about 930 mm can be used. The inner pipe 36 is provided with a slide handle 36a which is integrally joined so as to protrude from the side surface of the rear end portion thereof.

  Moreover, in this embodiment, the guide pulley 38 is each attached to the front-end | tip part of the outer side pipe 35 or the inner side pipe 36 via a support bracket, for example. A wire member 39 is wound around each of these guide pulleys 38. Reinforcing bar gripping portions 40 are respectively attached to the tip portions of the portions extending downward from the guide pulley 38 to the wire members 39, and the other portions of the wire members 39 are supported via the hollow interior of the inner pipe 36. It extends to the work space 45 to which the column part 30 is fixed. In the work space 45, by performing the advance / retreat operation of each wire member 39, the reinforcing rebar 11 suspended through the rebar holding portion 40 can be hung, lifted, or tilted. Yes.

  In the present embodiment, as shown in FIGS. 8A and 8B, the reinforcing bar gripping portion 40 is preferably for winding a reinforcing bar having an electromagnet 41 and a metal plate 42 that can be magnetically attached to the electromagnet 41 at the tip. And a belt 43. The reinforcing bar gripping part 40 winds the reinforcing reinforcing bar 11 with the reinforcing bar winding belt 43, magnetically attaches the metal plate 42 to the electromagnet 41, and holds the reinforcing reinforcing bar 11 to a predetermined position. After the suspension, the gripping state is released by turning off the power supply of the electromagnet 41 and the wire member 39 can be pulled up. The wiring for energizing the electromagnet 41 also extends to the work space 45 through the hollow interior of the inner pipe 36, and the rebar gripping portion 40 can be opened by an operation in the work space 45. ing. Further, a monitoring camera is appropriately attached to the distal end portion of the inner pipe 36 and the reinforcing bar gripping portion 40, and the reinforcing bar 11 is arranged while checking the internal situation of the reinforcing bar vertical slit 25. It is preferable to do.

  In this embodiment, using the reinforcing bar hanging bar arrangement apparatus 10 having the above-described configuration, for example, the vertical slit for bar arrangement formed on the wall surface portion 22 on the back side of the wires and pipes 23 as follows. 25, reinforcing reinforcing bars 11 are arranged at a predetermined pitch in the vertical direction.

  Here, a vertical slit 25 for reinforcing bars is formed in the wall surface portion 22 on the back side of the wires and pipes 23 installed in the upper tunnel portion 21 used as a joint groove of the existing reinforced concrete structure 20. For example, as shown in FIGS. 9A and 9B, a core boring hole 29 is formed in the wall surface portion 22 by using, for example, a known core boring device (not shown). The operation of forming the core boring hole 29 includes, for example, space portions 26a and 26b between the support bases 24 that support the wires and pipes 23 and are attached to the wall surface portion 22 in a plurality of stages, and above or For example, it can be easily performed by press-fitting the perforated portion of the core boring device while rotating it from the lower space portions 27a and 27b in a direction perpendicular to the wall surface portion 22, for example. Further, by this, for example, at a position avoiding the existing reinforcing bar 28a arranged on the inner surface side of the wall surface part 22, preferably near the existing reinforcing bar 28b arranged on the ground side outside the wall surface part 22. A plurality of core boring holes 29 can be easily formed in a state where they are arranged in a line in the vertical direction.

  When the plurality of core boring holes 29 are formed, the core boring holes 29 are connected in the vertical direction to form the vertical bar 25 for bar arrangement. The work of connecting the core boring holes 29 in the vertical direction includes, for example, the space portions 26a and 26b between the support bases 24 attached to the core boring holes 29, or the core boring holes 29 appropriately selected, in a plurality of stages, Through these upper or lower space portions 27a and 27b, for example, an injection nozzle portion of a water jet device (not shown) similar to the device used in Patent Document 1 described above is inserted, and water is directed upward or downward. Cutting concrete by jetting a jet. In this way, with the existing rebar 28a exposed without being cut, the upper and lower core boring holes 29 are connected to each other so that the vertical bar 25 for reinforcing bar extending continuously in the vertical direction is formed into the core boring hole. For example, it can be easily formed so as to have a depth of about 500 mm corresponding to the depth of 29 and a width of about 70 mm, for example.

  If such vertical slits 25 for reinforcing bars are formed in a plurality of rows on the wall surface portion 22 on the back side of the wires and pipes 23 at predetermined intervals in the tunnel axis direction of the upper tunnel portion 21, Using the reinforcing bar hanging bar arrangement apparatus 10, the reinforcing bar 11 is placed in each vertical bar 25 for reinforcing bars, and the working space 45 is not directly arranged in the vertical slit 25 for bar arrangement by an operator's hand. The reinforcing reinforcing bar 11 is suspended from above by a remote operation from the top and arranged in a vertical direction at a predetermined pitch.

Here, the reinforcing reinforcing bars 11 are deformed reinforcing bars having a diameter of, for example, about 29 mm in the present embodiment. Further, the reinforcing reinforcing bar 11 is between the reinforcing bar 28a of the existing reinforcing bars 28a arranged on the inner surface side of the wall surface part 22 of the reinforced concrete structure 20 and the deepest part of the reinforcing vertical slit 25. As a length that can be suspended in a state of being suspended obliquely at a distance of 480 mm, for example, a length of about 480 mm is provided. Further, the reinforcing reinforcing bars 11 are arranged in the vertical bar slits 25 for bar arrangement as a predetermined vertical pitch, for example, at a pitch of about 200 mm, and correspond to the pitch between the adjacent vertical bar slits 25 for bar arrangement. As the horizontal pitch, for example, the wall portion 22 is arranged with a pitch of about 500 mm.

  Further, in the present embodiment, as shown in FIG. 1, the reinforcing reinforcing bars 11 suspended from the upper part of the longitudinal bar 25 for reinforcing bars are formed of spacer rods 13 having a length corresponding to a predetermined pitch to be arranged. At least two spacer jigs 12 each having an upper connecting table 14 and a lower receiving table 15 attached to both ends are suspended in a state of being connected via the upper connecting table 14. And a concave receiving portion with the open side facing downward, and the concave reinforcing portion 11 is placed on the upper portion of the lower reinforcing reinforcing rod 11 ′ arranged in advance. The reinforcing reinforcing bar 11 is supported by the reinforcing reinforcing bar 11 ′, and the reinforcing reinforcing bar 11 can be arranged in the vertical direction at a predetermined pitch in the vertical slit 25 for reinforcing bar.

  In order to arrange the reinforcing reinforcing bars 11 in the longitudinal slits 25 for reinforcing bars, for example, after fixing the supporting column 30 and setting the reinforcing bar hanging reinforcing bar device 10 in the work space 45, FIGS. As shown in d), the reinforcing reinforcing bar 11 arranged at the lowermost part of the vertical slit 25 for reinforcing the bar is placed in the space portion 27b below the lower support frame 24 by using the lowermost spacer jig 50. After the reinforcing bars are manually arranged (see FIG. 10 (a)), the lower reinforcing bar 11 is used as the lower reinforcing bar 11 'arranged in advance. Using the bar arrangement device 10, the second reinforcing reinforcing bar 11 is preferably recessed from the lower pedestal 15 in a state where two spacer jigs 12 are connected from the space portion 27 a above the support frame 24. Until the receiving part 16 is placed on the upper part of the lower reinforcing bar 11 ′ Unloading Ri (see Figure 10 (b)).

  Here, when the reinforcing reinforcing bar 11 is suspended, the reinforcing reinforcing bar 11 is moved forward and backward toward the wall surface part 22 of the slide pipe part 37 guided by the guide pipe part 34 and the inner pipe 36 with respect to the outer pipe 35. By appropriately adjusting the advance / retreat length or the advance / retreat length of the pair of wire members 39 wound around the guide pulley 38, the existing rebar 28 a arranged on the inner surface side of the wall surface portion 22 is particularly used as a belt-like rebar. In order not to be caught, for example, in an inclined state or a horizontal state, it can be hung while appropriately changing its posture. In addition, each of the two spacer jigs 12 attached to the upper and lower adjacent reinforcing reinforcing bars 11 includes an upper connection base 14 of the lower spacer jig 12 and a lower base 15 of the upper spacer jig 12. It is preferable that these are attached to the reinforcing reinforcing bars 11 in a state where they are shifted laterally so that they do not overlap with each other.

  After the concave receiving portion of the lower pedestal 15 is placed on the upper part of the lower reinforcing bar 11 ′ and the second reinforcing bar 11 is arranged, subsequently, the reinforcing reinforcing bar 11 that has been arranged is preceded. As the lower reinforcing bar 11 ′, the upper reinforcing bar 11 is connected to the two spacer jigs 12 and the concave receiving portion 16 of the lower receiving base 15 is used for the lower reinforcing bar 11 ′. The suspension is sequentially suspended until it is placed on the upper part of the reinforcing bar 11 ′ (see FIG. 10C).

  In this way, the reinforcing reinforcing bars 11 of a plurality of stages are arranged in the vertical direction by using the reinforcing bar hanging bar arrangement apparatus 10 of the present embodiment inside the bar arrangement vertical slit 25 on the back side of the wires and pipes 23. It is possible to arrange the bars smoothly at a predetermined pitch (see FIG. 10D).

  Then, as shown in FIG. 10 (d), if the reinforcing reinforcing bars 11 in a plurality of stages are arranged at a predetermined pitch in the longitudinal direction inside the longitudinal slits 25 for reinforcing bars on the back side of the wirings and pipes 23, After the opening on the inner side surface of the wall surface portion 22 of the vertical bar for slitting 25 is closed with a formwork, for example, non-shrink mortar is injected into the vertical slit for bar arrangement 25 from the lower part thereof and solidified. Thus, the seismic reinforcement work for the wall surface portion 22 of the existing reinforced concrete structure 20 is completed.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, an existing reinforced concrete structure reinforced by reinforcing reinforcing bars using the reinforcing bar hanging bar arrangement apparatus of the present invention does not necessarily need to be a wall surface portion of a box culvert-shaped underground structure. The present invention can be employed as an apparatus for reinforcing various existing reinforced concrete structures with reinforcing bars. Further, the obstacle that obstructs the bar arrangement work may be an obstacle other than wirings and piping. Furthermore, the reinforcing reinforcing bars arranged using the reinforcing bar hanging bar arrangement apparatus of the present invention do not necessarily have to be suspended with the spacer jig connected, and the reinforcing reinforcing bars are suspended alone. The reinforcing bar hanging bar arrangement device of the present invention can also be used when arranging bars.

DESCRIPTION OF SYMBOLS 10 Rebar suspension reinforcement bar 11 Reinforcing bar 12 Spacer jig 20 Existing reinforced concrete structure 22 Wall surface part 23 Wiring and piping 24 Support frame 25 Vertical slits 28a and 28b for bar arrangement Existing bar 29 Core boring hole 30 Support column portion 31 Jack base 32 Support column 33 Clamp portion 34 Guide pipe portion 35 Outer pipe 36 Inner pipe 37 Slide pipe portion 38 Guide pulley 39 Wire member 40 Reinforcing bar gripping portion 41 Electromagnet 42 Metal plate 43 Reinforcing rod winding belt 45 Work space

Claims (3)

Reinforcing bar suspension used when a reinforcing bar is suspended from above and placed at a predetermined pitch in the vertical direction in a vertical slit for reinforcing bar formed by extending in the vertical direction on the wall surface of an existing reinforced concrete structure A down bar arrangement device,
A support column that is fixed in a state of being erected in a vertical direction, a clamp unit that is slidably attached to the support column in a vertical direction and can be fixed at a predetermined height position of the support column, and A guide pipe portion that is gripped by the clamp portion and extends laterally toward the wall surface portion, and an outer pipe and an inner pipe that are guided by the guide pipe portion and slide forward and backward toward the wall surface portion. A double-structured slide pipe portion made of
Guide pulleys are respectively attached to the outer pipe and the inner pipe tip of the slide pipe portion, and a pair of wire members are wound around the guide pulleys so that a pair of wire members are hollow inside the inner pipe. Through the work space where the support column is fixed, and extending from the work space to the lower part of the guide pulley so as to be able to advance and retreat by operation from the work space,
In addition, the reinforcing bar hanging bar arrangement apparatus, wherein a reinforcing bar gripping part for detachably holding the reinforcing reinforcing bar is attached to a tip part of the wire member on the lower part side of the guide pulley.   The support column part is composed of a support column having a jack base attached to an upper end part and a lower end part, and the jack base is pressed against a bottom board part and a top board part of the work space to obtain a support reaction force, The reinforcing bar hanging bar arrangement apparatus according to claim 1, wherein a support column is fixed to the work space.   The reinforcing bar gripping portion is configured to include an electromagnet and a reinforcing bar winding belt provided at a tip thereof with a metal plate that can be magnetically attached to the electromagnet, and the reinforcing bar is wound by the reinforcing bar winding belt, From the state in which the metal plate is magnetically attached to the electromagnet and the reinforcing reinforcing bar is gripped, the state in which the reinforcing bar is gripped by hanging the reinforcing reinforcing bar to a predetermined position and then turning off the electromagnet is released. Then, the reinforcing bar hanging bar arrangement apparatus according to claim 1 or 2, which can be pulled up together with the wire member.

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