JP4236256B2 - Hoop muscle dropping method and rope support tool when using the rope support tool - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a safety rope used at a construction site and a mooring technique for a parent rope. More specifically, the tubular body constituting the rope support tool is externally fitted to the exposed portion of the column main reinforcing bar, and the latching portion installed on the outer periphery of the tubular body is used as a safety rope or parent rope mooring means. When using the rope support tool to improve, the hoop muscles arranged on the outer periphery of the column main reinforcing bar group can be more easily dropped below the hooking portion, and the continuity as the rope mooring means, The present invention relates to a hoop muscle drop-in method and a rope support tool at the time of use of a rope support tool that has improved workability of hoop reinforcement.

Regarding this type of rope mooring technology, an exposed portion of a reinforcing bar under construction is used, and a cylindrical body with its upper end closed is fitted over the exposed portion of the reinforcing bar, and the cylindrical body A rope support tool for mooring a safety rope or a master rope via a latching portion installed on the rope is known (see Patent Document 1). Further, a rope support tool that employs a tubular body having upper and lower ends opened is also known (see Patent Document 2). In these prior arts, there are also known ones in which hooking portions are provided symmetrically on both sides of a rope support tool or are provided at intervals in the longitudinal direction so that a plurality of ropes can be moored. By the way, conventional rope support tools have been developed only from the viewpoint of mooring safety ropes and parent ropes, and the direction of the hooks of the rope support tools is naturally determined from the position of the fixing means for the reinforcing bars, etc. Since it is not assumed that the direction of the latching part will be changed later, it is not assumed that it will be used later. Was limited. Therefore, when the rope support tool is applied to the column main reinforcement, when the hoop reinforcement is arranged on the outer periphery of the column main reinforcement group, the rope is once removed from the latching portion, and the fixing means is loosened and latched. Rotate to a position where it does not interfere with the drop of the hoop, or remove the rope support tool itself from the column main rebar and drop the hoop, and then set the rope support tool to its original state again. Needed to be done. Further, since the rope cannot be moored by the rope support tool during the hoop muscle dropping operation, the continuity as the rope mooring means is interrupted, and there is a problem in terms of work safety.
JP-A-6-71773 JP-A-6-98945

  The present invention has been developed in view of the above-described state of the art, and a rope support tool to be attached by fitting a tubular body to an exposed portion of a column main reinforcing bar is attached to a safety rope or a main rope. As a means for mooring the leash, the hoop rebar arranged on the outer periphery of the column main reinforcing bar group can be more easily dropped below the hook of the leash installed on the tubular body. It aims at improving the workability of the bar arrangement work concerning the continuity of the hoop and the hoop.

  In the present invention, in order to solve the above-described problem, at least two latching portions are provided on the outer peripheral surface of the cylindrical body so that the central angle between them falls within a range of approximately 90 to 180 degrees and the longitudinal direction is spaced apart. The steel rope support tool is placed on the exposed part of the main column reinforcement, and the upper support part is inside the outer surface of the column main reinforcement group. And the lower latching portion is fixed in a state of projecting outward from the outer peripheral surface of the column main reinforcing bar group, and the lower latching portion is appropriately used as a rope latching means. When arranging the hoop muscles on the outer periphery of the group, temporarily support the required number of hoop muscles by the lower hooking portion, and then rotate the rope support tool relative to the column main rebar at an appropriate time. The upper latching part protrudes outside the outer peripheral surface of the column main reinforcing bar group, and the lower latching part is the outer peripheral surface of the column main reinforcing bar group By retracting inwardly, and adopt a method called On drop the hoop downward retainers.

  Furthermore, as a rope support tool used in the method of dropping the hoop muscle, at least two latching portions on the outer peripheral surface of the cylindrical body enter a range of the central angle between them in the range of approximately 90 to 180 degrees, In addition, the fixing means for fixing the rope support tool to the column main rebar is installed at a position substantially below the vertical line corresponding to each of the latching portions, or provided in a state spaced apart in the longitudinal direction. The rope support tool is provided with fixing means for fixing the rope support tool to the column main rebar at substantially the center of the central angle between the hooks of the rope. By changing the fixing position to the reinforcing bar, the upper latching part is located inside the outer peripheral surface of the column main reinforcing bar group, and the lower latching part protrudes outward from the outer peripheral surface of the column main reinforcing bar group, Temporary support for the hook and the hoop muscle From the usage state used as a step, the lower latching part is located inside the outer peripheral surface of the column main reinforcing bar group, and the upper latching part protrudes outward from the outer peripheral surface of the column main reinforcing bar group, The stopping part can be easily changed to a use state in which it is used as a means for hanging the rope. Incidentally, as the fixing means for fixing the rope support tool to the column main reinforcing bar, for example, a fixing bolt for fixing the tip main unit by pressing the tip portion against the column main reinforcing bar is suitable. Further, by forming at least the upper part of the lower latching part flat, it is possible to provide a more stable temporary support of the hoop muscle.

  In the case of the rope mooring technique according to the present invention, when the hoop reinforcement of the column main reinforcing bar group is arranged when the rope support tool is used, the required number of hoop reinforcements are temporarily supported on the lower latching portion. In addition, by rotating the rope support tool with respect to the column main reinforcing bar and retracting the lower latching portion to the inside of the outer peripheral surface of the column main reinforcing bar group, the hoop bar can be easily dropped below the latching portion. Can be included. Further, when the hoop bar is dropped, before the rope support tool is rotated with respect to the column main bar, the hoop bar is dropped from the lower hook part to the upper hook part, thereby dropping the hoop bar. It is possible to maintain continuity as a mooring means of the rope through the bar arrangement work to the position. Therefore, the workability of the work of dropping the hoop muscles downward of the hooking portion can be improved, and the safety of the work can be ensured through the dropping of the hoop muscles and the work of arranging the bars to a predetermined position.

  The rope support tool according to the present invention is generally made of metal, but may be formed of another material having sufficient strength. At least two latching portions installed on the outer peripheral surface of the rope support tool are in a state in which the central angle between them falls within a range of approximately 90 to 180 degrees and at an appropriate interval in the longitudinal direction. Provide. For example, the fixing means for fixing the rope support tool to the column main reinforcing bars is installed at substantially lower positions on the vertical line corresponding to the upper and lower hooking portions. If comprised in this way, a rope support tool can always be simply fixed easily by using the fixing means below the latching | locking part of the side which protrudes outside from the outer peripheral surface of a column main reinforcement group. Moreover, you may make it install a fixing means in the approximate center part of the center angle between the latching parts of a leash support tool. When configured in this manner, the fixing means can be positioned beside or in front of the column main rebar in any use state, so that simple fixing work can always be performed with a small number of fixing means. . In addition, even when the installation position of the fixing means at the central part of the central angle between the hooks is moved symmetrically to the opposite side with respect to any of the hooks, the rope support tool when the hoop is dropped Although the rotation direction is reversed, a similar effect is possible. As a specific shape of the cylindrical body constituting the rope support tool, a cylindrical shape is the most common and preferable, but it may be a cylindrical shape and does not exclude other cross-sectional shapes. Furthermore, as a specific fixing means, for example, a fixing bolt for fixing by pressing the tip portion against the column main reinforcing bar is suitable, but other fixing means can also be used. Moreover, if at least the upper part of the latching part below is formed flat, more stable temporary support of the hoop is possible, but the present invention is not limited to this.

  1-3 is explanatory drawing which showed the application state of the rope support tool which concerns on this invention. In the figure, 1 is a precast column and 2 is a precast beam. In this embodiment, the exposed portion of the column main reinforcing bars 3 and 4 projecting from the upper surface of the precast column 1 is connected to the rope support tool 5 from above. The case where it was configured to be fitted and used so as to cover 6 was shown. The rope support tools 5 and 6 have the same configuration, and are provided with an upper latching portion 7 and a lower latching portion 8 provided at intervals in the longitudinal direction as will be described later. By hooking the hook portion 9 and the like, the appropriate ropes 10 and 11 such as the master rope can be easily and reliably moored. Incidentally, the column main reinforcing bars 3 and 4 are selected from a group of column main reinforcing bars composed of a plurality of reinforcing bars, and can be appropriately selected in consideration of the installation state of the ropes 10 and 11. Further, it is needless to say that the rope support tools 5 and 6 according to the present invention may be applied without being limited to the specific form on the column side as long as the exposed portion of the column main reinforcing bar is sufficient.

  Next, the procedure for using the rope support tools 5 and 6 according to the present invention will be described with reference to FIGS. FIG. 1 shows a state in which the exposed portions of the column main reinforcing bars 3 and 4 are externally fitted so as to cover the rope support tools 5 and 6 and set in the first use state. In this first use state, the rope support tools 5 and 6 have the column main rebars 3 and 4 with the upper hooking portions 7 constituting the column main rebar groups, ie, the column main rebar groups. It is located inside the surface obtained by connecting the outer peripheral surfaces of the reinforcing bars such as the reinforcing bars 3 and 4, and the lower latching portion 8 is fixed in a state of protruding outward from the outer peripheral surface of the column main reinforcing bar group. In this state of use, the lower latching portion 8 is used as a latching means for the ropes 10 and 11 and is latched via the hook portion 9 as shown in the figure.

  Therefore, when the hoop bars 12 are arranged on the outer peripheral portion of the column main reinforcing bar group, the required number of hoop bars 12 are temporarily supported on the upper portion of the lower hooking portion 8 as shown in FIG. . In this case, since the upper latching part 7 is located inside the outer peripheral surface of the column main reinforcing bar group, there is no obstacle when temporarily supporting the upper part of the latching part 8 below the hoop bar 12. . Thereafter, at an appropriate time, the ropes 10 and 11 are exchanged from the lower latching portion 8 to the upper latching portion 7, and the rope support tools 5 and 6 are rotated with respect to the column main reinforcing bars 3 and 4 as shown in FIG. Transitions to the indicated usage state. By the rotation of the rope support tools 5 and 6, the upper latching portion 7 protrudes outside the outer peripheral surface of the column main reinforcing bar group, and the lower latching portion 8 is drawn inside the outer peripheral surface of the column main reinforcing bar group. Therefore, the hoop bar 12 temporarily supported on the lower latching part 8 is dropped into the gap 13 between the column main reinforcing bar group below the latching part 8 and the precast beam 2 by its own weight. Thereafter, the hoop bars 12 dropped into the gaps 13 are sequentially lifted and fixed at predetermined positions on the column main reinforcing bar group side, so that they are installed at the predetermined positions.

  Next, the Example regarding a rope support tool is described with reference to FIGS. 4 to 9 show a first embodiment relating to a rope support tool, FIG. 4 is a front view, FIG. 5 is a longitudinal sectional view, FIG. 6 is a left side view, FIG. 7 is a right side view, and FIG. Is a plan view, and FIG. 9 is a bottom view. The rope support tool according to the present embodiment shows the rope support tools 5 and 6 used in FIGS. Since the rope support tools 5 and 6 have the same configuration, the rope support tool 5 will be described below. As shown in the figure, in the rope support tool 5 according to the present embodiment, the upper hooking portion 7 and the lower hooking portion 8 are arranged on the outer peripheral surface of the cylindrical body 14 with a central angle between them. The angle is set to 180 degrees with an interval in the longitudinal direction. The upper latching portion 7 includes an L-shaped member 15 in which the lower horizontal portion is welded to the outer peripheral surface of the cylindrical body 14, and the upper end portion of the cylindrical body 14 and the L portion so as to close the upper end surface of the cylindrical body 14. It comprised from the flat plate 16 welded so that it might become flat between the upper end parts of the perpendicular | vertical part of the character-shaped member 15. FIG. The lower latching portion 8 includes an L-shaped member 17 in which a lower horizontal portion is welded to the outer peripheral surface of the cylindrical body 14, and an upper end of the outer peripheral surface of the cylindrical body 14 and the vertical portion of the L-shaped member 17. It comprised from the flat plate 18 welded so that it might become flat between parts.

  Fixing bolts 19 and 20 as fixing means for fixing the rope support tool 5 to the column main rebar 3 are provided at positions substantially below the vertical line corresponding to the latching portions 7 and 8 of the cylindrical body 14. installed. These fixing bolts 19, 20 are screwed into nuts 21, 22 welded to the outer peripheral surface of the cylindrical body 14, and their tip portions are connected to the column main reinforcing bars 3 inserted into the cylindrical body 14. By pressing, the rope support tool 5 is configured to be fixed to the column main rebar 3. In the figure, reference numerals 23 and 24 are processing holes formed on the opposite side when the insertion holes for the fixing bolts 19 and 20 are formed in the cylindrical body 14, and are not particularly necessary in terms of function. . As described above, in the rope support tool 5 according to the present embodiment, the fixing bolts 19 and 20 are disposed at substantially lower positions on the vertical line corresponding to the respective latching portions 7 and 8, and thus the upper latching portion. 7 or in any use state where the lower latching portion 8 is used, the fixing bolts 19 and 20 below the latching portions 7 and 8 on the side protruding outward from the outer peripheral surface of the column main reinforcing bar group are used. Accordingly, it is possible to always simply perform the tightening operation of the fixing bolts 19 and 20 from the outside of the column main reinforcing bar group.

  10 and 11 show a second embodiment relating to a rope support tool, in which FIG. 10 is a front view and FIG. 11 is a longitudinal sectional view thereof. As shown in the drawing, the rope support tool 25 according to the present embodiment is a modification of the first embodiment, and adopts plate-like members 26 and 27 instead of the L-shaped members 15 and 17 as latching portions. The hooks 9 and the like are hooked on the openings 28 to 31 formed in the plate-like members 26 and 27 so that appropriate ropes 10 and 11 can be moored. The other configuration is the same as that of the first embodiment and has the same function.

  12 and 13 show bottom views of the third and fourth embodiments relating to the rope support tool. The rope support tools 32 and 33 according to these embodiments are modified examples of the first embodiment or the second embodiment, and the center angle between the respective latching portions 34 and 35 or between the latching portions 36 and 37 is set. , The case where the angle is set to 90 degrees and the case where the angle is set to 135 degrees are illustrated. In this case, the central angle between the hooks may be the smaller inner angle. 14 and 15 show plan views of the fifth embodiment and the sixth embodiment. The center portion of the central angle between the latching portions 34 and 35 or between the latching portions 36 and 37 is 1. The case where the fixing bolts 38 and 39 are provided is shown.

It is explanatory drawing which showed the application state of the rope support tool which concerns on this invention. It is explanatory drawing which showed the application state of the rope support tool. It is explanatory drawing which showed the application state of the rope support tool. It is the front view which showed 1st Example regarding the rope support tool. It is the longitudinal cross-sectional view which showed the Example. It is the left view which showed the Example. It is the right view which showed the same Example. It is the top view which showed the same Example. It is the bottom view which showed the same Example. It is the front view which showed 2nd Example regarding the rope support tool. It is the longitudinal cross-sectional view which showed the Example. It is the bottom view which showed the 3rd Example regarding the rope support tool. It is the bottom view which showed the 4th Example regarding the rope support tool. It is the top view which showed 5th Example regarding the rope support tool. It is the top view which showed 6th Example regarding the rope support tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Precast pillar, 2 ... Precast beam, 3, 4 ... Column main reinforcement, 5, 6 ... Leash support tool, 7 ... Upper latch part, 8 ... Lower latch part, 9 ... Hook part, 10, 11 ... rope, 12 ... hoop, 13 ... gap, 14 ... cylindrical body, 15 ... L-shaped member, 16 ... flat plate, 17 ... L-shaped member, 18 ... flat plate, 19, 20 ... fixing bolt, 21, 22 ... Nuts, 23,24 ... Processing holes, 25 ... Left support tools, 26,27 ... Plate-like members, 28-31 ... Hook openings, 32,33 ... Left support tools, 34-37 ... Latch part, 38, 39 ... Fixing bolt

Claims (5)

  A column support tool provided with at least two latching portions on the outer peripheral surface of the tubular body and having a central angle between them within a range of approximately 90 to 180 degrees and spaced in the longitudinal direction. The main hook is externally fitted to the exposed part of the main reinforcing bar, and the upper hooking part is positioned inside the outer peripheral surface of the column main reinforcing bar group, and the lower hooking part is the pillar. When fixing to a state of projecting outward from the outer peripheral surface of the main reinforcing bar group, using the lower hooking part as a rope hanging means as appropriate, and arranging a hoop bar on the outer peripheral part of the column main reinforcing bar group Temporarily support the required number of hoop bars by the lower hooks, and then rotate the rope support tool with respect to the column main rebar at an appropriate time, so that the upper hooks are connected to the outer circumference of the column main bar group. The hoop bar by projecting to the outside of the surface and retracting the lower latching part to the inner side of the outer peripheral surface of the column main reinforcing bar group. Hoop dropped inclusive method in use of the rope supporting tool, characterized in that as On drop down retainers.   In a rope support tool configured to support an appropriate rope via a hook provided on a cylindrical body that can be externally fitted to an exposed portion of a column main reinforcing bar, at least two pieces are provided on an outer peripheral surface of the cylindrical body. Are provided in a state in which the central angle between them is in the range of approximately 90 to 180 degrees and spaced apart in the longitudinal direction, and the lower portion on the substantially vertical line corresponding to each of the latching portions. Fixing means for fixing the rope support tool to the column main rebar at each position and changing the fixing position of the rope support tool with respect to the column main rebar, the upper latching part is the outer peripheral surface of the column main reinforcement group From the state of use in which the lower latching portion protrudes outward from the outer peripheral surface of the column main reinforcing bar group and the lower latching portion is used as the leash latching means and the hoop muscle temporary support means. The lower latching part is located inside the outer peripheral surface of the column main reinforcing bar group, and the upper part Hooking portion protrudes outward from the outer peripheral surface of the pillar main reinforcing bar group, the upper rope support tool characterized by being capable of changing to a use state of using hook portion as locking means rope.   In a rope support tool configured to support an appropriate rope via a hook provided on a cylindrical body that can be externally fitted to an exposed portion of a column main reinforcing bar, at least two pieces are provided on an outer peripheral surface of the cylindrical body. Are provided in a state in which the central angle between them is in the range of approximately 90 to 180 degrees and spaced in the longitudinal direction, and at the central portion of the central angle between the engaging portions. By installing a fixing means for fixing the rope support tool to the column main rebar and changing the fixing position of the rope support tool with respect to the column main rebar, the upper latching part is located inside the outer peripheral surface of the column main reinforcement group. From the state of use where the lower latching portion protrudes outward from the outer peripheral surface of the column main reinforcing bar group and the lower latching portion is used as the rope latching means and the hoop muscle temporary support means. The latching part is located inside the outer peripheral surface of the column main reinforcing bar group, and the upper latching part is the column main reinforcing bar group From the outer circumferential surface protrudes outward, the upper rope support tool characterized by being capable of changing to a use state of using hook portion as locking means rope.   The rope support tool according to claim 2 or 3, wherein the fixing means for fixing the rope support tool to the column main reinforcing bar comprises a fixing bolt for fixing the column main reinforcing bar by pressing a tip portion thereof. The rope support tool according to claim 2 or 3, wherein at least an upper portion of the hooking portion below is formed flat.

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