JP3890118B2 - Scaffolding plate support device for concrete placement - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a concrete scaffolding plate support for supporting a scaffolding plate used in constructing a concrete structure formed by driving concrete such as a foundation structure, a bridge pier, a wall structure building, an underground wall, a retaining wall, etc. Relates to the device.
[0002]
[Prior art]
Underground structures such as subways, basements, and underground passages are formed by building concrete wall structures and foundation structures that have reinforcing bars and steel frames inside, and high-rise buildings such as hotels and apartments Similarly, it is constructed by building concrete wall structures and foundation structures. In addition, retaining walls and piers for earth retaining such as cliffs are also made of concrete.
[0003]
The various concrete structures described above include a reinforced concrete structure in which reinforcing bars are arranged inside, and a steel reinforced concrete structure in which reinforcing bars are arranged around a steel frame and integrated with concrete. When constructing such a concrete structure, formwork for constructing rebar construction for constructing steel frames, reinforcing bars, etc. embedded in the structure, and formwork for forming the outer surface of the structure Construction work, concrete work that puts concrete into the formwork, etc. will be performed.
[0004]
When performing the formwork, vertical support bars are attached to the base for fixing the formwork, and horizontal fixing bars extending in the horizontal direction are arranged at predetermined intervals in the vertical direction outside the vertical support bars. It will be attached every time. In concrete construction, since concrete is driven from above the formwork, it is necessary to arrange a scaffolding plate outside the formwork material in order to perform the work. In order to support the scaffold plate, a concrete placement scaffold plate support device, also referred to as a scaffold bracket or a formwork bracket, is attached to the outside of the formwork material.
[0005]
[Problems to be solved by the invention]
Conventionally, an L-shaped scaffold bracket is formed by a horizontal beam member and a vertical column member, and the leading end side of the horizontal beam member and the lower end side of the vertical column member are connected by an inclined beam member for reinforcement. . The upper end of the vertical support member is provided with a hook that engages with the upper horizontal fixing bar provided on the outer side of the formwork member, and the lower horizontal fixing bar is provided on the lower end of the vertical support member. An engaging bracket is provided, and the bracket can be fixed at a predetermined pitch in the vertical direction by a toggle pin.
[0006]
However, in such a conventional structure, if the vertical spacing of a plurality of horizontally fixed bars arranged extending in the horizontal direction on the outside of the mold material is not set with high accuracy, the hook and the bracket are surely secured. Each of these cannot transmit a desired load to the horizontal fixed bar. Therefore, in the formwork for constructing a concrete structure, it is necessary to make the vertical interval, that is, the pitch, of the horizontal fixed bars highly accurate, and it is difficult to improve the efficiency of the construction. there were.
[0007]
An object of the present invention is to enable a concrete structure to be constructed quickly and efficiently.
[0008]
The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.
[0009]
[Means for Solving the Problems]
Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
[0010]
That is, the concrete placement scaffolding plate support device of the present invention is configured such that when a concrete structure is constructed, it extends in the horizontal direction to the outside of the formwork material that forms the space into which the concrete is poured, and is vertically spaced at predetermined intervals. A concrete placement scaffolding plate support device that is disposed on a plurality of horizontal fixed bar members fixed to and supports the scaffolding plate, wherein the upper engagement portion that engages with the horizontal fixed bar member on the upper side is one end portion. And a horizontal beam member provided at the other end of the column support member to which the column for supporting the handrail is mounted, and the horizontal beam member is movably attached to the horizontal beam member, and can be attached to the horizontal beam member at an arbitrary position. A moving member to be fixed, and an inclined beam member having an upper end pin-coupled to the moving member and a lower engaging portion that engages with the lower horizontal fixing bar provided at the lower end portion. A scaffold on the horizontal beam member It characterized by being adapted to construct the concrete structure by working in on the arrangement to the scaffolding plate.
[0011]
In addition, the concrete placement scaffolding plate support device of the present invention has a clamp member that fastens the horizontal beam member to the upper horizontal fixing bar and prevents the horizontal beam member from coming off the horizontal fixing bar. To do.
[0012]
In the present invention, there is a deviation in the vertical interval between the horizontal fixed bar with which the upper engaging part is engaged and the other horizontal fixed bar with which the lower engaging part is formed. However, the displacement is absorbed, and the respective engaging portions are in close contact with the respective horizontal fixing rods.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 is a diagram showing an example of an underground structure for constructing a basement. This underground structure is constructed in a recess 11 formed by excavating the ground surface 10. The side wall part 12, the slab floor part 13, and the foundation part or partition wall part 14 etc. which are constructed | assembled along the perpendicular | vertical ground surface are included.
[0015]
FIG. 2 is a view showing a state in which a formwork for constructing any of the partition wall portions 14 shown in FIG. 1 is being performed, and is a concrete structure that is a reinforcing bar embedded in the partition wall portion 14. A state in which 20 bars are arranged is shown. The illustrated reinforcing bar 20 has a vertical reinforcing bar 20a extending in the vertical direction and a horizontal reinforcing bar 20b extending in the horizontal direction.
[0016]
Corresponding to both side surfaces of the partition wall portion as a concrete structure, a dam plate, that is, a formwork material 21 for partitioning a space into which concrete is driven is arranged, and the formwork material 21 is located outside this. It is supported by a plurality of vertical fixing rods 22. A plurality of horizontal fixing rods 23 extending in the horizontal direction and having a predetermined interval in the vertical direction are attached to the outside of the vertical fixing rods 22. As shown in FIG. 2, a plurality of horizontal fixing rods 23 are attached in accordance with the height dimension of the formwork member 21, and the horizontal fixing rods 23 of each pair are left and right. The positions in the vertical direction correspond to each other on the outside of the mold material 21. In the illustrated case, the vertical fixed bar 22 and the horizontal fixed bar 23 are each formed by a hollow round pipe. However, each of the bars 22 and 23 may be formed by a hollow square pipe having a square cross section.
[0017]
In FIG. 2, tie bolts 24 are provided on the outside of the mold material 21 so as to penetrate between a pair of horizontal fixing rods 23 corresponding to the vertical positions in order to maintain a constant space between the left and right mold material 21. A rib washer 25 is attached to both ends of each tie bolt 24, and each rib washer 25 is fastened by a nut 26 that is screwed to a threaded portion of the tie bolt 24.
[0018]
As shown in FIG. 2, by fixing the formwork material 21, a formwork for partitioning the space 14 a into which concrete is poured is formed. As shown in FIG. 3, a scaffolding plate 27 for an operator to drive concrete, that is, to place a concrete, is attached to the outside of the left and right formwork members 21.
[0019]
FIG. 4 is a view showing a concrete placement scaffolding plate support device 30 according to an embodiment of the present invention for supporting the scaffolding plate 27, and FIG. 5 is shown on both left and right sides of the formwork shown in FIG. The state which attached the scaffold board | substrate support apparatus 30 of FIG. 4 is shown. The scaffold board support device 30 is also referred to as a formwork bracket or a scaffold bracket. In FIG. 3, the scaffold board support device 30 is attached to each of the left and right formwork materials 21. The scaffold plate 27 is attached only to the outside of the left mold member 21, and the right mold member 21 is shown with no scaffold plate 27 attached yet.
[0020]
This scaffolding plate support device 30 has a horizontal beam member 31 formed by a hollow metal square pipe having a square shape in cross section, and an upper side engaged with a horizontal fixing rod 23 at one end thereof. The engagement portion 32 is provided, and the other end portion is provided with a sheath tube 33 to which the handrail support 28 is attached as a support member. The sheath tube 33 is formed of a metal round pipe having a circular cross-sectional shape. However, the sheath tube 33 may be formed of a metal square pipe having a square cross-sectional shape. Further, as the support column support member, a clamp member may be used instead of the sheath tube 33.
[0021]
On the outside of the horizontal beam member 31, a moving member 34 having a regular square cross section is attached along the horizontal beam member 31 so as to be movable in the longitudinal direction. The moving member 34 is provided with a screw member 35. When the screw member 35 is loosened, the moving member 34 can be moved. When the screw member 35 is tightened, the moving member 34 can be fixed at the position.
[0022]
A connecting fitting 36 is attached to the moving member 34, and an upper end portion of the inclined beam member 37 is pin-coupled to the moving member 34 by a pin 38 so as to be swingable around the connecting fitting 36. Similar to the horizontal beam member 31, the inclined beam member 37 is formed of a hollow metal square pipe. At the lower end of the inclined beam member 37, a lower engaging portion 39 that engages with another horizontal fixing rod 23 positioned below the horizontal fixing rod 23 with which the upper engaging portion 32 engages. Is provided. The lower engaging portion 39 is formed by bending a metal plate material into a U shape. The horizontal beam member 31 and the inclined beam member 37 may be formed by a hollow round pipe having a circular cross section.
[0023]
As shown in FIG. 3, the scaffolding plate support device 30 having such a structure is attached to a horizontal fixed bar 23 having the same height at predetermined intervals corresponding to the length of the scaffolding plate 27. A plurality of the frame materials 21 are arranged outside. When the respective scaffolding plate support devices 30 are engaged with the respective upper and lower horizontal fixing rods 23, even if an error or deviation occurs in the distance between the respective horizontal fixing rods 23, As shown in FIG. 6, by setting the position of the moving member 34 to an arbitrary position such as a position indicated by a solid line or a position indicated by a two-dot chain line, the horizontal beam member 31 can be set to a predetermined level. it can. In addition, since each of the engaging portions 32 and 39 is surely in contact with the horizontal fixed bar 23 without a gap, the load of the scaffolding plate support device 30 is distributed to the two horizontal fixed bars. Is transmitted.
[0024]
As shown in FIG. 4, the upper engaging portion 32 is formed by two clamp members 32 a and 32 b that are fixed to both side surfaces of the horizontal beam member 31.
[0025]
FIG. 7 is an enlarged view of a part of one clamp member 32a forming the upper engaging portion 32. The clamp member 32a has a concave portion 41 into which the horizontal fixing rod 23 enters, and the clamp member 32a includes A clamp piece 42 for preventing the upper engaging portion 32 from being detached from the horizontal fixed bar 23 entering the recess 41 is movably attached. Thus, by providing the upper engagement portion 32 with a clamping function, it is possible to reliably prevent the scaffold plate support device 30 from being inadvertently detached from the horizontal fixing member 23 due to vibration or the like.
[0026]
Two support pins 43 and 44 are fixed to the clamp member 32a, and cam grooves 45 and 46 with which the support pins 43 and 44 engage are formed in the clamp piece 42, respectively. When the clamp piece 42 is set at the clamp position shown by the solid line in FIG. 7, the clamp piece 42 is in the recess 41 and the entrance 41 a is narrower than the outer diameter of the horizontal fixed bar 23, and the upper engaging portion 32 is in the horizontal fixed bar 23. It is prevented from coming off. On the other hand, when the clamp piece 42 is set at a position indicated by a two-dot chain line, the width of the entrance / exit 41a is widened, and the upper engaging portion 32 can be detached from the horizontal fixed bar 23. Each of the support pins 43 and 44 has a head that is larger than the width of each of the cam grooves 45 and 46 so that the clamp piece 42 does not come off from the clamp member 32a. The other clamp members 32b have the same structure. Further, the lower engaging portion 39 may have the same structure as the upper engaging portion 32.
[0027]
Next, a procedure for attaching the scaffold plate 27 to the outside of the formwork member 21 using the above-described scaffold plate support device will be described.
[0028]
In order to construct the concrete structure under the state where the rebar construction of the concrete structure is completed, a formwork material 21 that forms a space into which concrete is driven is attached. As shown in FIG. 2, when the concrete structure is the partition wall or the base portion 14 shown in FIG. 1, the formwork material 21 is attached so as to correspond to both surfaces thereof. The mold material 21 has a predetermined height and width, a plurality of sheets are arranged in a predetermined posture such as a straight line, and each mold material 21 includes a plurality of vertical fixing rods 22 and a plurality of horizontal. It is fixed by a fixed bar 23. The mold materials 21 facing each other are held at a predetermined interval by a plurality of tie bolts 24.
[0029]
The distance between vertical fixed bars 22, that is, the pitch, the distance between horizontal fixed bars 23, and the distance between tie bolts 24 are set according to conditions such as the thickness of the concrete structure. After the mold member 21 is installed in this way, as shown in FIG. 3, the scaffolding plate support device 30 shown in FIG. 4 is placed at a predetermined interval on the horizontal fixing rod 23 having a predetermined height. Can be attached.
[0030]
At the time of attachment, the screw member 35 is loosened so that the moving member 34 can move along the horizontal beam member 31, and the upper engaging portion 32 is placed on the predetermined horizontal fixing bar 23 and the horizontal fixing bar The lower engagement portions 39 are engaged with the horizontal fixing rods 23 positioned below the lower portions 23, respectively. When the upper engaging portion 32 is engaged with the upper horizontal fixing rod 23, the clamp piece 42 is shifted to the position indicated by the two-dot chain line as shown in FIG. The upper engaging portion 32 is shifted from the position so that it does not come off from the horizontal fixing rod 23.
[0031]
In FIG. 6, reference numeral 23 a indicates an upper horizontal fixed bar with which the upper engaging part 32 is engaged, and reference numeral 23 b indicates a lower horizontal fixed bar with which the lower engaging part 39 is engaged. These vertical intervals are indicated by the symbol L. The horizontal fixing rods 23 are attached so that the distance L is constant. However, attaching the distance L with high accuracy reduces the workability, and considering workability, It will have a certain amount of error.
[0032]
Therefore, considering the workability of attaching the horizontal fixing bar 23, it is inevitable that an error occurs in the interval L. However, in the scaffolding plate support device of the present invention, the upper horizontal fixing bar 23a and the lower Even if there is an error in the distance L between the horizontal fixing rod 23 b on the side, the moving member 34 is moved along the horizontal beam member 31 to move the upper engaging portion 32 and the lower engaging portion 39. Can be adjusted steplessly. Thus, when the upper engaging portion 32 and the lower engaging portion 39 are engaged, the horizontal beam member 31 is swung around the upper engaging portion 32 so as to have a predetermined level, The moving member 34 moves along the horizontal beam member 31, and the horizontal beam member 31 is easily set to a predetermined level even if there is an error in the distance between the upper and lower horizontal fixed bars. Can do. When the predetermined level is reached, the moving member 34 is fastened and fixed to the horizontal beam member 31 by tightening the screw member 35.
[0033]
According to such a procedure, as shown in FIG. 3, after a predetermined number of scaffolding plate support devices 30 are attached to the outside of the formwork member 21, the scaffolding plate 27 is disposed thereon, A handrail support 28 is attached. The handrail support 28 is fixed to the sheath tube 33 by fastening a screw member 33a, and a handrail 29 is attached to the handrail support 28 as shown in FIG. 3 to ensure the safety of the operator. The
[0034]
The state in which the scaffolding plate 27 is arranged in this manner is as shown in FIG. 5, where an operator rides on the scaffolding plate 27 and puts the concrete in the space 14 a defined by the formwork material 21. Driving or placing work is performed.
[0035]
After the concrete driving operation is completed, other mold materials (not shown) are stacked on the respective mold materials 21 shown in FIG. 5, and a plurality of horizontal fixing rods are placed outside the mold materials. In addition, a scaffolding plate support device is attached at a predetermined height, and the same concrete is driven. In this way, a concrete structure having a predetermined height is constructed.
[0036]
FIG. 8 is a view showing a scaffolding board support device 30 according to another embodiment of the present invention. In this figure, members common to the members constituting the scaffolding board support device 30 shown in FIG. Is attached.
[0037]
In the scaffold board support device 30 of FIG. 8, the structure of the upper engaging portion 32 is different from that described above, but the other structures are the same. The upper engagement portion 32 in this case has an engagement piece 47 obtained by bending a metal plate material into a U-shaped cross section, and the engagement piece 47 extends from the horizontal fixing rod 23 that has entered the engagement piece 47. In order to prevent detachment, the clamp pin 48 is detachably fitted to the engagement piece 47. The clamp pin 48 is connected to the horizontal beam member 31 by a chain or a wire 49.
[0038]
FIG. 9 is a view showing another specific example of the upper engaging portion 32. The upper engaging portion 32 has a first engaging arm 51 fixed to one end portion of the horizontal beam member 31, and a pin for the first engaging arm 51. A clamp bolt 55 is provided at the tip of the first engagement arm 51 so as to be swingable around a pin 54. A groove 56 into which the clamp bolt 55 enters is formed at the distal end of the second engagement arm 52, and clamped in the groove 56 with the horizontal fixing rod 23 being inserted into both arms 51, 52. The upper engaging portion 32 can be clamped to the horizontal fixing bar 23 by inserting the bolt 55 and tightening the nut 57. The first engagement arm 51 may be attached to the horizontal beam member 31 such that the first engagement arm 51 is positioned below the second engagement arm 52 as shown in the figure, and conversely The combined arm 51 may be on the upper side.
[0039]
Even in the scaffolding plate support apparatus having the upper engaging portion 32 of the type shown in FIGS. 8 and 9, the scaffolding plate is attached by the same procedure as described above. 8 can be used as the lower engaging portion 39 shown in FIG. 4, and the upper engaging portion of the type shown in FIG. 9 is used as the lower engaging portion. It may be used as a support member.
[0040]
FIG. 10 is a diagram showing a conventional scaffold board support device as a comparative example, and this scaffold board support device has a scaffold bracket 63 formed in an L shape by a horizontal beam member 61 and a vertical support member 62, The front end side of the horizontal beam member 61 and the lower end side of the vertical column member 62 are connected by an inclined beam member 64 for reinforcement. A hook 65 that is engaged with an upper horizontal fixing bar provided outside the formwork material is provided at the upper end of the vertical column member 62, and a lower horizontal fixing bar is provided at the lower end of the vertical column member 62. A receiving metal fitting 66 that engages with the material is provided. The receiving metal fitting 66 can be moved up and down along the vertical column member 62 and fixed by a toggle pin 67 at a predetermined pitch.
[0041]
In the structure as shown in FIG. 10, the vertical distance between the hook 65 and the metal fitting 66 can be changed only at a predetermined pitch. If there is an error in this distance, a gap will be generated between the metal fitting 66 and the horizontal fixing bar. Therefore, the upper horizontal fixed bar receives most of the load of the scaffolding plate support device. Moreover, in order to change the vertical position of the metal fitting 66 at a predetermined pitch, the toggle pin 67 must be inserted and removed, and the workability is not good.
[0042]
On the other hand, in the scaffolding plate support apparatus 30 of the present invention, the horizontal fixing bar on both the upper and lower sides is obtained by loosening the screw member 35 and swinging the horizontal beam member 31 around the upper engaging portion 32. Since errors between each other can be absorbed, a load applied from the scaffold plate 27 to the respective scaffold plate support devices 30 is applied to the respective horizontal fixing rods 23 via the upper engagement portion 32 and the lower engagement portion 39. Can be reliably distributed and transmitted. Therefore, deformation of the horizontal fixed bar can be prevented, and a member having a small diameter can be used. Further, in the form work, since it is not necessary to make the vertical interval, that is, the pitch of the horizontal fixed bar, highly accurate, the work efficiency of the work can be improved.
[0043]
The formwork shown in FIG. 2 shows a case where the partition wall part 14 is constructed in the underground structure shown in FIG. 1, but this is an example of the formwork and the side wall part on the premises shown in FIG. 1. The scaffolding plate support device 30 of the present invention can also be used when building 12. In that case, since the outer side of the campus side wall portion 12 faces the ground surface, the scaffolding plate is not disposed outside the campus side wall portion 12 and corresponds to the inner side surface of the campus side wall portion 12. In order to arrange the scaffolding plate 27 outside the formwork material 21 to be attached, the scaffolding plate support device 30 is attached. In this case, unlike the tie bolt 24 shown in FIG. 2, a tie bolt of a type in which the base end portion is fixed to the mold material disposed on the ground surface side and the thread portion is provided only at the tip portion is used. The
[0044]
As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.
[0045]
For example, FIG. 1 shows an underground structure, but other than that, using a formwork material such as a wall in building a medium-rise building or a high-rise building such as an apartment built on the ground, If it is a concrete structure formed by forming a predetermined space and driving concrete into it, the scaffold board support device of the present invention can be used when constructing various structures such as piers and retaining walls. it can. In the illustrated case, the upper engaging portion 32 has a clamping function, but only the lower engaging portion 39 or both engaging portions 32 and 39 have a clamping function. Anyway.
[0046]
【The invention's effect】
Of the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.
[0047]
(1) Even if there is an error in the vertical spacing between the horizontal fixed bars attached to the outside of the formwork, the error is easily absorbed and the upper and lower engagement parts Can be securely attached to the horizontal fixing rod.
[0048]
(2) Since the error in the vertical spacing between the horizontal fixed bars can be increased, the installation can be done quickly without high accuracy, and the construction of the concrete structure can be done quickly and efficiently. Can be done automatically.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an underground structure as an example of a concrete structure.
FIG. 2 is a cross-sectional view showing a state where a formwork material is attached to construct a concrete structure.
FIG. 3 is a perspective view showing a state in which the scaffolding plate support device of the present invention is attached to the outside of the formwork shown in FIG. 2;
4A is a perspective view showing a scaffold board support device according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along line 4B-4B in FIG.
FIG. 5 is a cross-sectional view showing a state in which the scaffold board support device is attached to the outside of the formwork member.
6 is a front view of FIG. 4;
FIG. 7 is an enlarged front view showing a clamp member of the upper engagement portion shown in FIG.
FIG. 8 is a perspective view showing a scaffold board support device according to another embodiment of the present invention.
FIG. 9 is a perspective view showing another specific example of the upper engaging portion.
FIG. 10 is a front view showing a conventional scaffold board support device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Ground surface 12 Side wall part 14 Partition wall part 14a Space 20 Reinforcement 21 Formwork material 22 Vertical fixed bar 23 Horizontal fixed bar 24 Tie bolt 25 Rib washer 27 Scaffold plate 28 Handrail support 29 Handrail 31 Horizontal beam member 32 Upper engagement portion 32a Clamp member 33 Saya tube 34 Moving member 35 Screw member 37 Inclined beam member 38 Pin 39 Lower engagement portion 42 Clamp piece 43 Support pin

Claims (2)

When constructing a concrete structure, it is arranged on a plurality of horizontally fixed bars that extend in the horizontal direction and are fixed at predetermined intervals in the vertical direction on the outside of the formwork material that forms the space into which the concrete is driven, and A concrete placement scaffolding plate support device for supporting a scaffolding plate,
A horizontal beam member in which an upper engagement portion that engages with the upper horizontal fixing bar is provided at one end portion, and a column support member to which a handrail support column is mounted is provided at the other end portion;
A movable member that is movably attached to the horizontal beam member and is fixed to the horizontal beam member at an arbitrary position;
An upper end portion is pin-coupled to the moving member, and a lower engaging portion that engages with the lower horizontal fixing rod has an inclined beam member provided at the lower end portion,
A concrete placement platform support apparatus, wherein a concrete plate can be constructed by placing a scaffold board on the horizontal beam member and working on the scaffold board. 2. The concrete placing scaffolding plate support device according to claim 1, wherein the upper engaging portion prevents the horizontal beam member from being detached from the horizontal fixed bar by fastening the horizontal beam member to the upper horizontal fixed bar. A scaffolding plate support device for placing concrete, comprising a clamp member.

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