JP2006312869A - Form support mechanism and placing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form support mechanism which can extremely easily adjust the installation location and the shape of a floor slab, and enables floor slab placement in a short time and at a low cost, and to provide a placing method. <P>SOLUTION: According to the structure of the form support mechanism, support members 10, 11 are arranged on both sides of a main girder, and beam members 14, 15 extending in a direction that crosses the main girder have one-side ends thereof connected to the main girder and the other-side ends thereof supported by the support member 10, 11. Then a beam holding means 50 for holding the beam member to the main girder is formed of a hanger 51 attached to a web plate of the main girder, a holding portion 56 supported by the hanger 51 rotatably in a direction perpendicular to the hanger, and holding the beam member, and an angle adjusting means 70 maintaining the holding portion 56 in a manner inclining at a desired angle with respect to the hanger. The hanger 51 has a plurality of support portions formed therein each of which functions to support the holding portion 56 at a vertically desired location, and then one of the support members is alternatively selected to support the holding portion 56. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a support mechanism for a fixed mold frame used when placing a floor slab on a main girder, a beam material support jig used to hold a beam material on a main member constituting a skeleton of a structure, and a main The present invention relates to a placing method for placing a floor slab on a girder.

A fixed formwork is used when placing a concrete slab on a main girder extending in parallel. Conventionally, various methods have been adopted to support the fixed formwork on the main beam. In recent years, in the field of bridges, it is demanded to construct a floor slab with high accuracy as well as to perform construction at a low cost and in a short period of time. The present applicant has tackled such a problem and has already disclosed various means for solving this problem (for example, see Patent Document 1).

The support mechanism for the fixed mold frame disclosed in Patent Document 1 relates to a support mechanism installed on a minority main girder bridge having a main girder extending in parallel and a plurality of horizontal girders connecting the main girder. For the side, the first pipe support supported at one end at the base of the lower flange of the main girder and the web, the turn buckle supported at one end at the base of the upper flange of the main girder and the web, and the top of the main girder A girder outer support beam that extends outward from the flange, and one or two second pipe supports, one end of which is supported by the outer girder support beam, and the one or two second pipe supports. The other end of the first pipe support, the other end of the first pipe support, and the other end of the turnbuckle are configured to be coupled at one place.

On the other hand, regarding the structure between the main girders, support mechanisms similar to the support mechanisms installed on the outside are installed in each main girder and alternately arranged in a staggered manner in the axial direction of the main girder. ing.
JP 2002-167716 A

The support mechanism for the fixed mold frame disclosed in Patent Document 1 can obtain high rigidity, prevents displacement due to deformation of the support mechanism until the floor slab is finished, and has high precision floor slab. It is excellent in that it can be obtained.

However, in order to finely adjust the position of the installed floor slab with respect to the main girder, the length of the support itself can be adjusted, or a square member for gap adjustment etc. can be mounted on the beam material. Was. For this reason, much labor and time are required for fine adjustment.

After placing the floor slab, wall rails will be installed on both sides of the floor slab. When installing wall railings, scaffolding is required on both sides of the floor slab. The scaffold has been newly provided after placing the floor slab, or has utilized both side portions of the beam material, that is, a portion projecting outward from both sides of the floor slab. In the case where a new scaffold is provided, this work requires a great deal of labor and is expensive. In addition, when using the beam overhang as a scaffold, the support mechanism for the fixed formwork is installed in the main girder as it is until the wall rail is installed even after the floor slab has been placed. It was necessary to keep it. For this reason, an extra addition is given to the main girder.

The present invention has been made in view of such problems, and further develops the invention described in Patent Document 1 to provide a support mechanism for a fixed mold that can adjust the installation position of the floor slab and the shape of the floor slab very easily, and In addition to providing jigs for holding beam materials, there is provided a method for placing a floor slab that can be used from a floor slab placement to a wall rail installation in a short period of time using these jigs. It is to provide.

  In the present invention, in order to solve such a problem, firstly, a fixed mold frame that is used when a floor slab is placed on a parallel main girder is supported by the main girder. It is a mechanism, arranged on both the left and right sides of each main girder, respectively, and arranged to extend in the direction intersecting with this main girder on both the left and right sides of each main girder, One end of the main girder is connected to the belly plate of the main girder and the other end is supported by the support member, and each main girder has beam material holding means for holding the beam material on the main girder. The beam member holding means is attached to the abdominal plate of the main girder, the suspension member is attached to the abdomen plate of the main girder, and is supported so as to be rotatable in the vertical direction with respect to the suspension member. The holding part to be held, and the holding part is maintained at a desired angle with respect to the hanging bracket. And a plurality of support portions for supporting the holding portions at predetermined positions in the vertical direction. The holding portions are selected from these supporting portions. A support mechanism for the fixed mold supported by a uniquely selected support portion was adopted.

  According to the present invention, a plurality of support portions for supporting the holding portion at a predetermined position in the vertical direction are formed on the hanging metal fitting, and the holding portion is selectively selected from these support portions. It is supported by the supported part. For this reason, the beam material which supports the lower surface of the floor slab can be easily installed at a desired height. In addition to this, since the holding portion for holding the beam material is configured to be rotatable with respect to the hanging metal fitting, the inclination of the beam material can be changed to a desired inclination angle. Thereby, the lower surface shape of a floor slab can be adjusted correctly. Further, by rotating the holding portion with respect to the hanging metal fitting, the holding position where the holding portion holds the beam material relatively moves up and down. Using this, the installation position of the beam material can be moved up and down.

  Further, in the present invention, in the support mechanism for the fixed mold, the holding portion of the beam material holding means is provided with a plurality of holding positions to which one end of the beam material is attached in the vertical direction, and one end of the beam material is provided. Is attached to a holding position selected alternatively from these holding positions. For this reason, while being able to take the height adjustment width large, fine adjustment can be performed by the combination of the adjustment mechanism of the hanging metal fitting and the holding portion.

  In the present invention, in the support mechanism for the fixed mold, the outer side of the main girder extending in parallel is arranged on the outer side of the beam material arranged on the outer side of the main girder, coaxially with the beam material. An extending auxiliary beam is detachably provided to the beam material, and the auxiliary beam is provided with auxiliary beam attaching means for detachably attaching the auxiliary beam to the floor slab to be placed. It is characterized by that.

  By providing such a configuration, after placing the floor slab, members other than the auxiliary beam can be removed from the main beam, and only the auxiliary beam can be left. Thereby, the auxiliary beam can be used as a scaffold. Moreover, since parts other than the auxiliary beam can be removed from the main beam, it is possible to prevent an extra force from acting on the main beam.

  On the other hand, in the support mechanism for the fixed formwork, in the present invention, the beam members held by the main beams are communicated to the other ends of the beam members arranged between the main beams. Second beam connecting means for connecting the second beam material is provided, and the second beam connecting means connects the second beam to the beam material so as to be rotatable in a horizontal direction with respect to each beam material. It is characterized by that.

  In this way, the rigidity of the support mechanism for the fixed mold can be improved by connecting the beams provided between the main beams with the second beam material. At this time, as in the configuration adopted by the present invention, since the second beam material can be rotated in the horizontal direction with respect to the beam material, the beam attached to one main beam and the other main beam respectively. Even if the materials are installed at alternate locations in the direction in which the main beam extends, the beam materials can be easily communicated with each other by rotating the second beam material relative to the beam material.

  Further, in the present invention, secondly, in order to solve the above-mentioned problem, a holding jig for holding a beam material to a main member constituting a skeleton of a structure, and a hanging metal fitting attached to the main member; A holding portion that is supported so as to be rotatable in a vertical direction with respect to the hanging bracket and that holds the beam material, and a rotation angle of the holding portion with respect to the hanging bracket is adjusted to a predetermined angle, and the adjusted predetermined angle Angle adjusting means for maintaining the holding portion with respect to the suspension fitting, and the suspension fitting is provided with a plurality of support portions for supporting the holding portion in the vertical direction. A beam holding jig configured to be supported by a support portion that is alternatively selected from the support portions is employed.

  The beam material provided in the support mechanism of the fixed formwork used when placing the slab on the main girder of the bridge, and the beam material attached to the column and beam of the building structure have a height and inclination. Many adjustments are made. According to the beam holding jig according to the present invention, the holding portion can be supported by selecting the support position of the holding portion with respect to the hanging bracket at a desired height. Thereby, the height of a beam material can be adjusted. In addition, the height adjustment can be performed very easily because only a desired support portion is selected from the support portions provided on the hanging bracket. Moreover, since the holding | maintenance part is comprised rotatably with respect to a hanging metal fitting and the angle adjustment mechanism which adjusts the angle of both is provided, height can be adjusted, adjusting inclination.

  Further, in this beam material holding jig, a plurality of holding positions to which the beam material is attached are formed in the holding portion in the vertical direction, and the beam material is alternatively selected from these holding positions. It is configured to be attached to the holding position.

  Since such a configuration is provided, not only the height adjustment width can be increased, but also a finer adjustment can be made by a combination of the adjustment mechanism of the hanging bracket and the holding portion.

  The angle adjusting means includes a rod attached to the holding portion so as to reciprocate with respect to the suspension fitting, and a fitting portion coupled to the tip of the rod and fitted into the edge of the suspension fitting. The head portion is formed, and the tip end of the rod and the head portion are coupled to each other with a universal joint structure.

  By providing the fitting portion on the head, it is possible to effectively prevent the head from being detached from the hanging bracket. In addition, since the rod tip and the head are coupled to each other with a universal joint structure, this angle adjusting means can freely correspond to the angle of the holding portion with respect to the hanging bracket. In addition, it is good to employ | adopt the structure which forms a screw hole in a hanging metal fitting, and forms a screw in the outer peripheral surface of a rod, and screws a rod in the screw hole of a hanging metal fitting as attachment of a rod to a hanging metal fitting. At this time, by forming the rear end portion of the rod in a hexagonal shape, the rod can be reciprocated by a generally used ratchet wrench.

  And in the present invention, in order to solve the above-mentioned problem, thirdly, a method of placing a floor slab on a main girder extending in parallel, wherein support materials are respectively attached to the left and right sides of each main girder, The beam material is arranged in the direction intersecting the main girder on both the left and right sides of the main beam, and one end of the beam material is held on the stomach plate of the main girder using a beam material holding jig, and the other end is A support mechanism installation process in which the support mechanism of the fixed mold is supported on the main girder and supported by the support material, and the beam material main girder held by the beam material holding jig in the beam material holding jig. An adjustment step of adjusting the relative height and inclination with respect to the horizontal, and a placement step of placing a floor slab on the main girder using the fixed mold after adjustment, in the support mechanism installation step, An auxiliary beam extends coaxially with the beam material on the outer side of the beam material arranged outside the main beam. In the placing step, the auxiliary beam is attached to the floor slab via the auxiliary beam attaching means, and after the placing step, only the auxiliary beam is attached. A floor slab placing method was adopted in which the support material and the beam material were attached to the floor slab and removed from the main girder.

  According to this placing method, the floor slab is first placed by adjusting the height and inclination of the beam material, so that a highly accurate floor slab can be placed on the main girder. Further, by providing an auxiliary beam and attaching it to the floor slab, this auxiliary beam can be used as a scaffold when installing a wall rail on the side of the floor slab. At this time, since only the auxiliary beam is left and other members are removed from the main beam, it is possible to prevent an excessive force from acting on the main beam. Moreover, since the support mechanism can be removed from the main girder before the wall rail is installed, the construction period can be shortened.

  As described above, according to the present invention, when the floor slab is placed on the main girder, the height and inclination of the beam members constituting the support mechanism can be freely set, so that a highly accurate floor slab can be placed. At this time, the height can be adjusted only by selecting the support portion formed on the beam holding jig, and therefore, the adjustment can be made in a short time without any effort. Furthermore, since the tilt of the beam can be tilted to a desired angle simply by operating the angle adjusting means provided on the beam holding jig, the angle can be adjusted in a short time without any effort. .

  Moreover, since the beam holding jig has versatility, it can be used not only for a bridge but also for a building structure.

  The support mechanism of the present invention is provided with an auxiliary beam in addition to the beam material. Since this auxiliary beam can be attached to the floor slab, this auxiliary beam can be used as a scaffold when a wall rail is provided on the side of the floor slab. That is, in the step of installing the wall rail, it is possible to effectively prevent an extra force from acting on the main girder by leaving only the auxiliary beam and removing other members of the support mechanism from the main girder.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a support mechanism for a fixed mold according to the first embodiment of the present invention.

  First, a brief description will be given of a bridge to which the support mechanism for the fixed formwork is applied. The bridge is disposed between a pair of main girders 1 and 1 supported by columns (not shown) and the main girders 1 and 1, The main girder 1 and 1 have a horizontal girder 5 connecting them. The concrete floor slab 6 is placed on top of these main girders 1 and 1.

  The pair of main girders 1 and 1 are supported by struts or the like so as to extend in parallel with each other, and each main girder 1 and 1 has a belt-like belly plate 2 and 2 having a predetermined height, and a belly plate The upper flanges 3, 3 project in the thickness direction of the abdominal plates 2, 2 at the upper ends of 2, 2, and the lower flanges 4, 4 project in the thickness direction at the lower ends of the abdominal plates 2, 2. Yes. The horizontal girder 5 is configured to connect the belly plates 2 and 2 of the main girders 1 and 1, and the basic configuration is the same as the main girders 1 and 1, the belly plate 5 a having a predetermined height. And an upper flange 5b projecting in the thickness direction from the upper end of the abdominal plate 5a, and a lower flange 5c projecting in the thickness direction from the lower end.

  The concrete slab 6 is placed so as to be supported on the upper surface of the upper flange 3 of the main girders 1 and 1. The concrete floor slab 6 to be placed is placed so that both side portions thereof project outward from the main girders 1 and 1. This concrete floor slab 6 is formed so that the portion between the main girders 1 and 1 is formed with a constant thickness, and the portion supported by the main girders 1 and 1 where the greatest moment is generated has the thickest thickness. The The outer portions of the main girders 1 and 1 are formed such that the lower surfaces thereof are inclined so that the thickness thereof becomes thinner toward the outside. Further, wall height columns 7, 7 extending upward from the concrete floor slab 6 are installed on both sides of the concrete floor slab 6. These wall height columns 7 and 7 form the side wall of the bridge, and are installed along the side wall of the concrete floor slab 6 that has been placed.

  A mechanism for supporting the fixed formwork used when the concrete slab 6 is placed and when installing the wall height columns 7 and 7 on the side of the concrete slab 6 on the main girders 1 and 1 is implemented. It is a support mechanism of the fixed formwork concerning a form.

  The support mechanism for the fixed mold is composed of support pipes 10 and 11 as a pair of support members disposed on the left and right sides of the abdominal plates 2 and 2 of the main girders 1 and 1, and the support pipes 10 and 11 Large pulling members 14 and 15 as beam members to be supported are provided. As shown in FIG. 2, the support pipes 10 and 11 and the large pulling members 14 and 15 include those attached to one main beam 1 and those attached to the other main beam 1. With respect to the extending direction of the girders 1 and 1, they are alternately shifted.

  As shown in FIG. 3, the support pipes 10, 11 arranged with the abdominal plates 2, 2 sandwiched therebetween are connected to the base portions of the abdominal plate 2 of the main girder 1 and the lower flange 4, respectively. Has been. The support pipe 11 arranged between the main girders 1 extends obliquely upward from the base of the abdomen plate 2 and the lower flange 4 toward the center of the main girders 1 and 1, while the main girder A support pipe 10 disposed on the outside of the main body 1 extends outwardly from the base of the abdomen 2 and the lower flange 4 toward the outer side of the main girder 1 and extends outwardly obliquely upward. Is arranged to draw a “V” shape.

  A lug 12 having a pin hole is provided at the lower end of each support pipe 10, 11, and this lug 12 is pin-coupled to a mounting bracket provided at the base of the abdominal plate 2 and the lower flange 4. Are attached to each. On the other hand, lugs 13 having pin holes are also provided at the upper ends of the support pipes 10 and 11, and the support fittings 20 and 20 that support the large pulling members 14 and 15 from below are the upper ends of the support pipes 10 and 11. It is pin-coupled to.

  The large pulling members 14 and 15 are arranged so as to extend left and right from the belly plate 2 of each main girder 1, and one end of each large pulling member 14 and 15 is placed on the upper part of the belly plate 2 and a beam holding jig 50. The other end is supported on the upper ends of the support pipes 10 and 11 by support brackets 20 and 20.

  First, the large pulling material 14 arranged on the outer side of each main beam 1 will be described. As shown in FIG. 3, the large pulling material 14 is held at one end by a beam holding jig 50 attached to the outer surface of the abdominal plate 2, while the other end of the outer side of the support pipe 10. It is supported by the upper end and is inclined obliquely so that the other end on the outer side is located above the one end. Since the details of the beam holding jig 50 will be described later, the configuration of the other end side located outside will be described in detail here.

  A support fitting 20 for supporting the large pulling material 14 is attached to the upper end of the support pipe 10. A lug 13 having a pin hole is provided at the upper end of the support pipe 10, and the support fitting 20 is pin-coupled to the lug 13. The support fitting 20 is formed in a U shape in cross section, receives the large pulling material 14 on its lower surface, sandwiches the side surfaces of the large pulling material 14 on both side surfaces 21, and tightens the side surfaces of the large pulling material 14 with bolts. It is tightened.

  Further, an auxiliary beam 17 arranged coaxially with the large pulling material 14 is provided on the outer side of the other end of the large pulling material 14. One end of the auxiliary beam 17 is attached to a support bracket 20 that supports the other end of the large pulling material 14, and the tip of the auxiliary beam 17 is located outside by a predetermined distance from the side edge of the concrete slab 6 on which the tip is placed. It extends. Protrusions 22 extending toward the outer side of the main girders 1, 1 are formed on both side surfaces 21 of the support bracket 20, and the auxiliary beam 17 is sandwiched between the projections 22 to support the bracket. It is attached to 20 by bolting. Thus, the auxiliary beam 17 is configured to be detachable from the other end of the large pulling material 14.

  Square members 25 and 26 are mounted on the upper surfaces of the large pulling member 14 and the auxiliary beam 17 in the same direction as these axes. Further, a plurality of receiving members 27... 27 extending in parallel with the main beam 1 are arranged on the square members 25 and 26 at predetermined intervals in the axial direction of the large pulling member 14 and the auxiliary beam 17. ing. The fixed form forming the concrete floor slab 6 is supported by the large pulling member 14 and the auxiliary beam 17 through the square members 25 and 26 and the receiving members 27.

  As shown in FIG. 4, the auxiliary beam 17 is provided with an auxiliary beam attachment 30 that can be freely attached to and detached from the lower surface of the concrete floor slab 6 to be placed. The auxiliary beam fixture 30 is attached to the insert 31 embedded in the lower surface of the concrete floor slab 6 to be placed, the rod-like suspension bar 32 screwed into the insert 31, and the suspension bar 32. And a receiving plate 33 to be supported from the outside. The insert 31 is a cylindrical member having a screw hole formed therein, and is embedded in the concrete floor slab 6 so that the lower end thereof is flush with the lower surface of the concrete floor slab 6. The hanging rod 32 has a screw formed on the outer periphery thereof. The upper end of the suspension bar 32 is screwed into an insert 31 embedded in the concrete floor slab 6, and an intermediate position in the axial direction is passed through the auxiliary beam 17. The center of the receiving plate 33 is penetrated from the lower part of the suspension bar 32, and the position is stopped by a nut 35 from below and attached to the suspension bar 32. Further, two square members 34, 34 are provided on the upper surface of the receiving plate 33 with the suspension rod 32 interposed therebetween, and the receiving plate 33 supports the auxiliary beam 17 from below through these square members 34, 34. ing.

  As described above, the auxiliary beam 17 attached to the concrete slab 6 by the auxiliary beam fixture 30 is the same as the concrete slab after the support mechanism of the fixed formwork is removed from the main girders 1 and 1. 6 can be left. 5 and 6 show a mode in which the auxiliary beam 17 is used as a scaffold when the wall column 7 is installed on the side portion of the placed concrete floor slab 6 while leaving the auxiliary beam 17. . As apparent from FIGS. 5 and 6, the auxiliary beam 17 is attached to the side of the concrete slab 6 even after the other members of the support mechanism of the fixed formwork are removed from the main girders 1 and 1. It is kept attached by the tool 30. And this auxiliary beam is used as it is as a scaffold for wall rail installation. On the upper surface of the auxiliary beam, a seat 40 that supports the lower surface of the wall height columns 7 and 7 is disposed at a position corresponding to the installation portion of the wall height column 7. Further, plate members 41 and 41 for an operator to walk are provided on the outer side of the pedestal 40 so as to be parallel to the side edges of the concrete floor slab 6. Using these, the wall height column 7 is installed along the side edge of the concrete slab 6. 5 and 6, the outer wall portion is supported by the support 45 until the lower portion and the side edge of the concrete floor slab 6 are fixed, so that the occurrence of displacement or the like is prevented. ing. The support 45 has a panel 46 that comes into contact with the outer surface of the wall rail, and three mounting bars 47 for fixing the panel 46 to the outer surface of the wall rail are provided in the vertical direction. Two guide rods 48, 48 extending along the outer surface of the wall height column 7 are provided at each mounting rod 47 so as to be pressed against the outer surface of the panel 46 by a clamp 49.

  Next, with reference to FIGS. 1 to 3 again, the large pulling material 15 disposed between the main girders 1 and 1 will be described. One end of the large pulling material 15 is held by a beam holding jig 50 attached to the inner surface of the abdominal plate 2, and the other end arranged on the center side of the main girders 1, 1 is the support pipe 11. Supported at the top. The beam holding jig 50 holding one end of the large pulling material 15 sandwiches the beam plate 2 and the beam holding jig 50 holding the large pulling material 14 arranged on the outer side of the main girders 1 and 1. At the same position. The other end of the main girders 1 and 1 on the center side is supported by a support metal fitting 20 coupled to the upper end of the support pipe 11. The support fitting 20 is formed in a U shape in cross section, receives the large pulling material 15 on its lower surface, sandwiches the side surface of the large pulling material 15 on both side surfaces 21, and the side surface of the large pulling material 15 Bolts are tightened. The large pulling material 15 is arranged substantially horizontally without being inclined.

  Further, an auxiliary beam 16 having a predetermined length is disposed on the other end of the large pulling material 15 coaxially with the large pulling material 15. One end of the auxiliary beam 16 is attached to a support bracket 20 that supports the other end of the large pulling material 15, and the other main girder 1 opposite to the main girder 1 to which each auxiliary beam 16 is attached. It extends towards the side. Protrusions 22 extending toward the outer side of the main girders 1 and 1 are formed on both side surfaces of the support bracket 20, and the auxiliary beam 16 is sandwiched between the projections 22 to the support bracket 20. It is attached with bolts.

  As described above, the large pulling members 15 and the support pipes 11 provided in the main girders 1 and 1 are alternately arranged with a predetermined distance from each other in the extending direction of the main girders 1 and 1. For this reason, the auxiliary beams 16 attached to the other end side of the large pulling material 15 are wrapped with each other. Since the auxiliary beam 16 is wrapped in this way, the concrete floor slab 6 to be placed can be supported with high rigidity and strength at the center of the main girders 1 and 1.

  Next, the beam holding jig 50 in which the large pulling material is attached to the main girders 1 and 1 will be described.

  7 to 9 show details of the beam holding jig 50 for holding the large pulling members 14 and 15 on the main beam 1. The beam holding jig 50 is supported by a hanging bracket 51 screwed to the belly plate 2 of the main girder 1 and rotatably supported by the hanging bracket 51, and one end of the large pulling members 14, 15 is provided. The holding portion 56 to be held and the angle adjustment mechanism 70 for adjusting the inclination angle of the holding portion 56 with respect to the suspension fitting 51 and maintaining the holding portion 56 with respect to the suspension fitting 51 at the adjusted desired inclination angle position. It consists of and.

  The suspension fitting 51 includes a plate-like base plate 52 that is in close contact with the abdominal plate 2 and a plate-like support plate 53 that is provided so as to be orthogonal to the base plate 52 and supports the holding portion 56. It is configured. An attachment hole penetrating the abdominal plate 2 is formed in the abdominal plate 2 of the main girder 1, and the hanging bracket 51 is bolted to the attachment hole so as to sandwich the abdominal plate 2 from the left and right. Yes. The support plate 53 is formed with two support holes 54 and 55 arranged in the vertical direction.

  The suspension fitting 51 is provided with an auxiliary hole 53 a having a large diameter below the support hole 55. The auxiliary hole 53a is a hole for attaching a turnbuckle, a chain, or the like that supports the scaffold when the main scaffolds 1 and 1 are assembled with the middle scaffold or the lower scaffold.

  On the other hand, the holding portion 56 is joined to the holding plate 57 so as to be arranged in parallel with the holding plate 57 at a right angle to the plate-like holding plate 57 arranged in parallel to the support plate 53 of the hanging metal fitting 51. Mounting plates 63 and 65. The holding plate 57 is a member for rotatably holding the holding portion 56 with respect to the hanging bracket 51 and holding the large pulling members 14 and 15. The holding plate 57 has one half half 57a formed in a substantially triangular shape, and its top is formed in an arc shape. A support hole 58 having the same dimensions as the support holes 54 and 55 formed in the support plate 53 of the hanging bracket 51 is formed near the tip of the half half 57a. On the other hand, the other half half 57b is formed in a quadrilateral shape. In the vicinity of the side edge of the other half half 57b, a plurality of holding holes 60, 61, 62 are formed so as to be lined up and down.

  In this holding portion 56, the support hole 58 formed in the holding plate 57 is pinned to the support hole selected alternatively from the two support holes 54 and 55 formed in the support plate 53 of the hanging bracket 51. It couple | bonds and is supported with respect to the suspension metal fitting 51 so that rotation is possible. The plurality of holding holes 60, 61, 62 formed in the holding plate 57 hold one end of the large pulling members 14, 15 in a holding hole that is alternatively selected from these holding holes.

  The two attachment plates 63 and 65 that form a right angle with the holding plate 57 are members to which an angle adjusting mechanism 70 that adjusts the holding portion 56 to a predetermined inclination angle with respect to the suspension fitting 51 is attached. Of the two mounting plates 63, 65, one mounting plate 63 is arranged so as to extend up and down substantially at the center of the holding plate 57 so as to divide the holding plate 57 into left and right. The other mounting plate 65 is arranged so as to be parallel to the mounting plate 63 at a lower portion of the holding plate 57 with a predetermined distance from the mounting plate 63. A through hole 64 penetrating the mounting plate 63 is formed in the lower portion of the mounting plate 63, while a screw hole 66 is formed in the mounting plate 65 at substantially the center thereof.

  An angle adjusting mechanism 70 is attached to the through hole 64 and the screw hole 66. The angle adjusting mechanism 70 includes a rod 71 inserted into the through hole 64 and the screw hole 66, and a cylindrical head 77 coupled to the tip of the rod 71. In the rod 71, a portion 72 from the central portion in the axial direction to the front end side is formed in a rod shape, while a portion from the central portion to the rear end portion is formed as a screw portion 73. Further, the rear end portion 76 of the rod 71 is formed in a hexagonal shape like a bolt head. On the other hand, the tip 74 of the rod 71 is formed in a spherical shape. The base portion 75 of the tip portion 74 formed in a spherical shape is formed with a constricted portion whose diameter is reduced.

  The head 77 is formed in a cylindrical shape, and its inside 78 is hollow. A hole 79 into which the rod 71 is inserted is formed in the rear end surface of the head 77, while the front end side is closed (see FIG. 8). Further, a fitting groove 80 extending in the diameter direction of the head 77 is formed on the tip surface of the head 77 (see FIG. 9). The tip portion 74 of the rod 71 formed in a spherical shape is inserted into a hollow portion formed in the interior 78 of the head 77. The cavity formed in the interior 78 of the head 77 is formed on the rear end face of the head 77 while the inner diameter is slightly larger than the outer diameter of the tip 74 of the rod 71 having a spherical shape. The hole 79 has a diameter smaller than the outer diameter of the tip 74 of the rod 71. In this way, the tip 74 of the rod 71 is coupled to the head 77 by the structure of the universal joint, and the rod 71 can be freely rotated with respect to the head 77 without coming out of the head 77. The rod 71 and the head 77 are coupled so as to bend freely with respect to the axis of the head 77.

  In this angle adjusting mechanism 70, a threaded portion 73 hung from the central portion of the rod 71 to the rear end side is screwed into a screw hole 66 formed in the mounting plate 65, while a rod shape extending from the central portion to the distal end side. This part 72 is inserted into the through hole 64 of the mounting plate 63. Then, the head 77 coupled to the tip of the rod 71 is set in association with the support plate 53 of the hanging bracket 51. The head 77 is engaged with the support plate 53 by fitting the fitting groove 80 formed on the front end surface of the head 77 into the edge of the support plate 53.

  As described above, the suspension metal fitting 51, the holding portion 56, and the angle adjusting mechanism 70 are configured, and if the rod 71 of the angle adjusting mechanism 70 is screwed in, the amount of the rod 71 protruding from the mounting plate 63 is increased and held. The angle of the portion 56 with respect to the hanging bracket 51 is widened. If the rod 71 is rotated in the opposite direction with respect to the mounting plate 65, the protruding amount of the rod 71 from the mounting plate 63 is shortened, and the angle of the holding portion 56 with respect to the hanging bracket 51 is decreased. Since the head 77 and the rod 71 constituting the angle adjusting mechanism 70 are coupled by the structure of a universal joint, even if the angle of the holding portion 56 with respect to the hanging bracket 51 changes, the angle adjusting mechanism 70 does not change this angle. Smoothly follow changes.

  10 to 12 show modes in which the beam material holding jig 50 having such a configuration is operated to change the height and inclination of the beam material relative to the main beam 1 in various ways. 10 to 12 show an example in which the holding portion 56 is supported by the support hole 55 formed on the lower side of the two support holes 54 and 55 formed on the support plate 53 of the hanging metal fitting 51. It shows.

  FIG. 10 shows a mode in which the large pulling material 15 is held at the highest position by the holding portion 56 when the holding portion 56 is supported by the support hole 55 formed on the lower side of the support plate 53. Of the three holding holes 60, 61, 62 formed in the holding plate 57 of the holding portion 56, the large pulling material 15 is held in the holding hole 60 formed in the uppermost stage. Further, the angle adjusting mechanism 70 attached to the holding portion 56 opens the angle of the holding portion 56 with respect to the hanging bracket 51 so that the large pulling material 15 is moved upward. The head 77 of the angle adjusting mechanism 70 is fitted with a fitting groove 80 formed on the tip end surface thereof in the lower part of the support plate 53 of the suspension fitting 51. The rod 71 is screwed toward the hanging bracket 51 so that the amount of protrusion from the mounting plate 63 increases. When the rod 71 is screwed in, the holding portion 56 is rotated around the support hole 55 of the support plate 53 and the support hole 58 of the holding plate 57 that are connected to each other, and is in a position that is greatly rotated with respect to the hanging bracket 51. Fixed. As a result, the position of the holding hole 60, which is the connection point between the large pulling material 15 and the holding portion 56, is moved upward to hold the large pulling material 15 at a high position, and the upper pulling material 15 and the upper flange of the main girder 1 3 can be set small.

  FIG. 11 shows a state in which the large pulling material is held with the holding portion 56 closed with respect to the hanging metal fitting 51. Also in FIG. 11, the large pulling material 15 is held in the holding hole 60 formed at the top of the holding holes 60, 61, 62 formed in the holding plate 57 of the holding part 56. In the embodiment shown in FIG. 11, the rod 71 of the angle adjusting mechanism 70 is retracted backward so that the amount of protrusion from the mounting plate 63 is small. Thereby, the holding part 56 is closed with respect to the hanging metal fitting 51, and the position of the holding hole 60 holding the large pulling material 15 is moved downward.

  FIG. 12 shows a mode in which the large pulling material 15 is held at a position further lower than the state shown in FIG. 11. The large pulling material 15 is held in the lowermost holding hole 62 formed in the holding plate 57 of the holding portion 56. Also in this case, the rod 71 of the angle adjustment mechanism 70 is retracted backward so that the amount of protrusion from the mounting plate 63 is small, and the holding portion 56 is closed with respect to the hanging metal fitting 51. Thereby, the position of the holding hole 62 holding the large pulling material 15 is moved downward, and the large pulling material 15 is held at a low position. By holding the large pulling material 15 at a low position, the gap between the large pulling material 15 and the upper flange 3 of the main girder 1 can be set large.

  10 to 12, the angle of the holding portion 56 with respect to the hanging bracket 51 is changed while keeping the large pulling material 15 horizontal. However, the inclination of the large pulling material 15 corresponds to the rotation angle of the holding portion 56. Can be set to a desired inclination.

Thus, by changing the angle of the holding portion 56 with respect to the hanging bracket 51 and appropriately selecting the holding holes 60, 61, 62 to the holding portion 56 of the large pulling material 15, the height of the large pulling material 15 is increased. Can be held at a desired position, and the inclination of the large pulling material 15 can be set freely. 10 to 12, the support hole 55 formed on the lower side of the support holes 54 and 55 formed on the support plate 53 of the hanging bracket 51 is selected to support the holding portion 56. The support hole 54 formed on the upper side can also be selected. When this upper support hole 54 is selected, the upper support hole 54 is oversized in a range that is shifted upward by the size of the support hole 54 and the support hole 55 as compared to the height adjustment range shown in FIGS. The height of the material 15 can be adjusted.

  As described above, the case where the two support holes 54 and 55 are provided in the hanging metal fitting 51 and the case where the three holding holes 60, 61 and 62 are provided in the holding plate 57 of the holding portion 56 have been described as an example. However, it is only necessary to provide an appropriate number of support holes and holding holes according to the object.

  If the support mechanism of the fixed form frame provided with the above structure is utilized, the concrete floor slab 6 can be driven on the main girders 1 and 1 and the wall height columns 7 and 7 can be installed by the following procedure.

  First, the beam holding jig 50 is attached to the belly plates 2 and 2 of the main girders 1 and 1 at predetermined intervals in the extending direction of the main girders 1 and 1. At this time, in one main girder 1 and the other main girder 1, beam material holding jigs 50 are attached in a staggered manner in the extending direction of the main girders 1 and 1. The beam holding jig 50 is attached to the outer surface and the inner surface of the belly plates 2 and 2 at the same position with the belly plates 2 and 2 in between. In addition, the support holes 54 and 55 which support the holding part 56 to the hanging metal fitting 51 are selected in advance according to the shape and the placement position of the concrete floor slab 6 to be placed.

  Next, the lower ends of the support pipes 10 and 11 are supported by the bases of the belly plates 2 and 2 of the main girders 1 and 1 and the bottom flanges 4 and 4 at positions corresponding to the mounting portions of the jigs 50 for holding these beam members. Let The support pipes 10 and 11 are supported on both the outside and the inside of the main girders 1 and 1, respectively. Further, each beam member holding jig 50 attached to the inner and outer surfaces of the abdominal plates 2 and 2 holds one end of the large pulling members 14 and 15 and supports the other end to the upper ends of the support pipes 10 and 11. Let When holding the ends of the large pull members 14 and 15 to the beam holding jig 50, the holding holes 60, 61 and 62 of the holding portion 56 are appropriately set according to the shape and height of the concrete floor slab 6 corresponding to the part. Select and hold. Further, the angle of the held large pulling members 14 and 15 is appropriately adjusted using the angle adjusting mechanism 70. While adjusting these, the support pipes 10 and 11 that support the other ends of the large pulling members 14 and 15 are expanded and contracted so that the large pulling members 14 and 15 are held at an appropriate height and inclination. To do.

  Next, the auxiliary beam 16 is attached to the distal end portion of the large pulling material 15 disposed on the inside so as to extend coaxially with the large pulling material 15. On the other hand, the auxiliary beam 17 is attached to the tip of the large pulling material 14 arranged on the outside so as to extend coaxially with the large pulling material 14. The auxiliary beams 16 and 17 are attached to the end portions of the large pulling members 14 and 15 on the support fitting 20 that supports the large pulling members 14 and 15. At this time, the auxiliary beam fixture 30 is attached to the auxiliary beam 17 arranged on the outside.

  Thereafter, the fixed formwork is installed on the upper portions of the main girders 1 and 1 while being supported by the support mechanism, and the concrete floor slab 6 is placed. When the concrete hardens, the insert 31 of the auxiliary beam fixture 30 attached to the auxiliary beam 17 is embedded in the concrete floor slab 6.

  Then, the other members of the support mechanism are removed leaving the auxiliary beam 17. Wall height columns 7 and 7 are installed on the side edges of the concrete floor slab 6 using the auxiliary beam 17 left on the side of the concrete floor slab 6 as a scaffold. Thereafter, the auxiliary beam 17 is removed from the lower surface of the concrete floor slab 6 and the placing work of the concrete floor slab 6 with the wall height columns 7 and 7 provided on the side edges is finished.

  In addition, when removing a support mechanism, it is good to attach the suspension metal fitting 51 of the jig | tool 50 for beam material holding | maintenance to the abdominal plates 2 and 2 as it is. If the hanging bracket 51 is left on the abdominal plates 2 and 2, it can be used for the installation of the scaffold. For example, when it is necessary to perform maintenance after several years have passed since the completion of the bridge, the scaffolding can be installed by using the hanging bracket 51 by leaving the hanging bracket 51. In addition, the scaffold can be installed by using the insert 31 embedded in the concrete floor slab 6.

  Next, a second embodiment will be described.

  As shown in FIGS. 13 and 14, the support mechanism for the fixed mold is also a support pipe 10 as a pair of support members disposed on the left and right sides of the belly plates 2 and 2 of the main girders 1 and 1. 11 and large pulling members 14 and 15 as beam members supported by the support pipes 10 and 11, respectively. As shown in FIG. 14, the support pipes 10, 11 and the large pulling members 14, 15 according to this embodiment are attached to one main girder 1 and attached to the other main girder 1. Are arranged at the same position with respect to the direction in which the main girders 1 and 1 extend, and are arranged in a straight line in the left-right direction. In this second embodiment as well, the basic structure formed by the support pipes 10 and 11 and the large pulling members 14 and 15 is the same as that of the first embodiment. Are given the same reference numerals, and detailed description thereof is omitted.

  In this embodiment, the ends of the large pulling material 15 arranged inside the main girders 1 and 1 are connected to each other by a bite beam 90 as a second beam material. As shown in FIG. 1515, the both ends of the bite beam 90 are supported by the support fitting 20 that supports the end portions of the large pulling members 15. The bite beam 90 has a strip-shaped vertical plate 91 having a predetermined height, an upper flange 92 protruding in the thickness direction at the upper end of the vertical plate 91, and extends in the thickness direction at the lower end portion of the vertical plate 91. The lower flange 93 is comprised. The connection bracket 95 is joined to the end portion of the bite beam 90 in the axial direction so as to protrude from the end surface of the upper flange 92 toward each support fitting 20. The bite beam 90 is connected to the large pulling material 15 by attaching the connection bracket 95 to the support fitting 20.

  FIG. 16 shows details of the connection state between the support fitting 20 and the connection bracket 95. The bite beam 90 is arranged slightly below the support fitting 20 and is connected so that the connection bracket 95 is suspended from the support fitting 20 by the suspension bolt 100.

  A through-hole 96 is formed in the central portion of the connection bracket 95 joined to the end of the bite beam 90. On the other hand, as shown in FIGS. 17 and 18, the support fitting 20 is formed with projecting portions 22 so as to protrude from both side surfaces 21 of the support fitting 20 to the center side of the main girders 1 and 1. A rectangular plate 23 is attached to the leading end portions of the protruding portions 21 so as to communicate with the protruding portions 22. A through hole 24 is formed at the center of the plate 23.

  The suspension bolt 100 is inserted into the through hole 96 of the connection bracket 95 and the through hole 24 of the rectangular plate 23 attached to the tip of the protruding portion 22. The nut 101 is screwed from the upper end of the suspension bolt 100 toward the upper surface of the plate 23, and the nut 102 is screwed from the lower end of the suspension bolt 100 toward the lower surface of the connection bracket 95. Thus, since the bite beam 90 and the support fitting 20 are connected using the suspension bolt 100 and the nuts 101 and 102, the height of the bity beam 90 can be freely adjusted by moving the nuts 101 and 102 up and down. Can be adjusted. Further, the connecting bracket 95 is supported from below by the nut 102, and the plate 23 has only the nut 101 in contact with the upper surface thereof, and the suspension bolt 100 and the connection bracket 95, as well as the suspension bolt 100 and the plate. 23 are not mutually bound. Accordingly, the bite beam 90 can rotate in the horizontal direction with this connecting portion as a fulcrum. For this reason, for example, the large pulling material 15 held by one main girder 1 and the large pulling material 15 held by the other main girder 1 are arranged at positions shifted in the extending direction of the main girders 1 and 1. Even if it is, both large pulling materials 15 can be communicated.

  In the second embodiment, the bite beam 90 has been described as an example of the second beam material. However, the present invention is not limited to this, and other beam materials such as I-shaped steel, channel material, angle material, square pipe, hori beam, May be used.

  The beam material holding jig 50 has been described as an example in which the beam material holding jig 50 is applied to a main girder constituting a bridge. However, the beam material holding jig 50 can be applied to a building structure other than a bridge. For example, when a beam material is attached to a column or beam of a building structure, a beam holding jig is attached to the column. Then, one end of the beam material is held through the beam material holding jig. As a result, the height of the beam material can be set at a desired height, and the beam material can be installed at a desired angle as well as simply installed horizontally.

The figure which shows the support mechanism of the fixed formwork concerning one Embodiment of this invention. The figure which looked at the support mechanism of the fixed mold shown in FIG. 1 from the top. The figure which shows the detail about the one main girder side of the support mechanism of the fixed formwork shown in FIG. The figure which shows the attachment state of the auxiliary beam distribute | arranged to the outer side of the main beam in detail. The figure which shows the state in which only the auxiliary beam was attached to the floor slab. The figure which expands the site | part of the auxiliary beam of FIG. 5, and shows the detail. The figure which shows the detail of the jig for beam material holding | maintenance which holds the large pulling material as a beam material to a main girder. The figure which shows the angle adjustment mechanism which comprises the jig | tool for beam material holding | maintenance. The figure which shows the head of the angle adjustment mechanism shown in FIG. The figure which shows the one aspect | mode which adjusted the height and angle of the large pulling material as a beam material using the beam material holding jig. The figure which shows the jig for beam material holding | maintenance and the large pulling material which were adjusted to the aspect shown in FIG. Furthermore, the figure which shows the jig for beam material holding | maintenance adjusted to another state, and a large pulling material. The figure which shows the support mechanism of the fixed mold frame concerning 2nd embodiment of this invention. The figure which looked at the support mechanism of the fixed mold shown in FIG. 13 from the top. The figure which shows the 2nd beam material which has connected the large drawing materials as a beam material. The figure which shows the detail of the connection part of the large drawing material as a beam material, and a 2nd beam material. The side view of the support metal fitting which supports the edge part of a large draw material. The front view of the support metal fitting shown in FIG.

Explanation of symbols

1 Main girder 2 Abdomen 6 Concrete floor slab 7 Wall rail 10, 11 Support pipe (support material)
14,15 Large pulling material (beam material)
16, 17 Auxiliary beam 20 Support bracket 22 Projection portion 23 Plate 30 Auxiliary beam fixture 31 Insert 32 Suspension bar 33 Receiving plate 50 Beam material holding jig (beam material holding means)
51 Suspension metal fittings 54, 55 Support hole (support part)
56 Holding part 60, 61, 62 Holding hole (holding position)
70 Angle adjusting mechanism 71 Rod 77 Head 80 Fitting groove 90 Bitity beam (second beam material)
95 Connecting bracket 96 Through hole 100 Suspension bolt 101, 102 Nut

Claims (8)

A fixed formwork support mechanism for supporting a fixed formwork used when placing a floor slab on a main girder extending in parallel with the main girder,
A support material disposed on each of the left and right sides of each main girder and attached to each main girder so as to extend in a direction intersecting with the main girder on each of the left and right sides of each main girder. A beam member connected to the abdominal plate and supported at the other end by the support member,
In each main girder, beam material holding means for holding the beam material in this main girder is attached to the belly plate of the main girder,
The beam member holding means is a suspension fitting attached to the belly plate of the main girder, a holding portion that is supported so as to be rotatable in the vertical direction with respect to the suspension fitting, and holds the one end of the beam member, and this holding And an angle adjusting means for inclining and maintaining a portion at a desired angle with respect to the suspension fitting, and the suspension fitting has a plurality of support portions for supporting the holding portion at predetermined positions in the vertical direction. A support mechanism for a fixed mold, wherein the holding part is formed and supported by a support part that is alternatively selected from these support parts. The holding portion of the beam material holding means is provided with a plurality of holding positions to which one end of the beam material is attached in the vertical direction, and one end of the beam material is alternatively selected from these holding positions. The support mechanism for a fixed mold according to claim 1, wherein the support mechanism is attached to a holding position. On the outer side of the main girder extending in parallel, an auxiliary beam extending coaxially with the beam material is detachably provided on the outer side of the beam material arranged on the outer side of the main girder. And
Furthermore, the auxiliary beam is provided with auxiliary beam attachment means for detachably attaching the auxiliary beam to the floor slab to be placed. Formwork support mechanism. At the other end of each beam member arranged between the main beams, second beam connecting means for connecting a second beam member for connecting the beam members held by each main beam is provided. And
4. The fixing according to claim 1, wherein the second beam connecting means connects the second beam to the beam material so as to be rotatable in a horizontal direction with respect to the beam materials. Formwork support mechanism. A holding jig for holding a beam material to a main member constituting a skeleton of a structure,
A suspension fitting attached to the main member, a holding portion that is supported so as to be vertically rotatable with respect to the suspension fitting, and that holds the beam material, and a rotation angle of the holding portion with respect to the suspension fitting is set to a predetermined angle. Adjusting and maintaining an angle adjusting means for maintaining the holding portion with respect to the suspension bracket at the adjusted predetermined angle,
The suspension bracket is provided with a plurality of support portions for supporting the holding portion in the vertical direction, and the holding portion is configured to be supported by a support portion that is alternatively selected from these support portions. A jig for holding beam material. In the holding portion, a plurality of holding positions for attaching the beam material are formed side by side in the vertical direction, and the beam material is configured to be attached to a holding position that is alternatively selected from these holding positions. 6. The beam holding jig according to claim 5, wherein the beam holding jig is provided. The angle adjusting means includes a rod attached to the holding portion so as to reciprocate with respect to the suspension fitting, and a fitting portion that is coupled to the tip of the rod and is fitted to the edge of the suspension fitting. And a head portion
The beam holding jig according to claim 5 or 6, wherein a joint between the tip of the rod and the head portion is configured as a universal joint. A method of placing a floor slab on a main girder extending in parallel,
Support members are attached to the left and right sides of each main girder, and beam members are arranged on the left and right sides of each main girder in a direction crossing the main girder. A support mechanism installation step of holding the material holding jig, supporting the other end with the support material, and installing the support mechanism of the fixed mold on the main girder;
In the beam material holding jig, an adjustment step of adjusting the relative height and inclination with respect to the horizontal of the main beam of the beam material held in the beam material holding jig,
A placing step of placing a floor slab on the main girder using the fixed formwork after adjustment;
With
In the support mechanism installation step, the auxiliary beam is detachably installed on the beam member so as to extend coaxially with the beam member on the outer side of the beam member arranged outside the main beam,
In the placing step, the auxiliary beam is attached to the floor slab via auxiliary beam attaching means,
After the placing step, only the auxiliary beam is attached to the floor slab, and the support member and the beam member are removed from the main girder.

Images