JP5483169B2 - Concrete formwork - Google Patents

Description

The present invention relates to a structure of the concrete form to be used for pouring the concrete.

  Various structures have been proposed for concrete molds. For example, a reinforcing frame is reinforced on the back surface of a dam plate made of a flat plywood, etc., and the back of the reinforcing frame is reinforced with a butter material made of a steel pipe pipe, etc. It prevents the weir plate from being deformed by the weight.

  In addition, a recyclable concrete formwork has been proposed today as a globally friendly technology. For example, there has been proposed a concrete formwork that can be used repeatedly by using recyclable paperboard as a dam (Patent Document 1).

JP 2002-256699 A

However, in the conventional concrete formwork with such a configuration, when reversing the front and back of the dam plate, after removing a number of nails, removing the dam plate from the pier, and again using the many nails to the pier It was necessary to fix, and the work was complicated.
Also, in the concrete formwork that is repeatedly used with recyclable paperboard for the dam plate, it can be diverted multiple times, but it has lower bending strength than the plywood dam plate, and it is installed behind Compared to the case where plywood is used, the number of reinforcing materials to be made needs to be increased by about 1.5 to 2.0 times, and the assembling work of the concrete formwork is complicated.

  The present invention has been proposed in view of the above, and is a concrete formwork that can achieve weight reduction and cost reduction, and can reduce the overall distortion and distortion by integration, thereby improving workability. And it aims at providing the construction method using the same.

In order to achieve the above object, the concrete formwork of the present invention comprises a long plastic pipe, a width stop member, and a flat plate-like dam plate, and the plastic pipes are arranged in one or more longitudinal directions. And a concrete mold in which the plastic pipes adjacent to each other are connected with bolts and nuts via the width stop member to reinforce the back surface of the weir plate, and an angled extension member is extended to the end of the plastic pipe. The extending plastic pipe is attached to the angled extension member, and the back surface of the weir plate having a predetermined angle with respect to the weir plate attached to the plastic pipe is reinforced by the extending plastic pipe .

Moreover, in this invention, it consists of a long plastic pipe, a width | variety stop member, and a flat plate-shaped dam plate, and arranges the said plastic pipe 1 or several in the vertical direction, and adjoins via the said width | variety stop member. A concrete mold in which plastic pipes are connected to each other with bolts and nuts and the back surface of the dam plate is reinforced, and the width stop member has a short rectangular tube shape with upper and lower ends and one side surface opened, It is characterized by comprising a partition wall that partitions the opened upper and lower ends .

  In the present invention, the partition wall is formed in a tapered shape having an increased thickness from the open side surface toward the back.

  In the present invention, the plastic pipe has a rectangular tube shape, and a plurality of bolt holes are formed at predetermined intervals along the longitudinal direction.

  Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.

The present invention comprises a long plastic pipe, a width-stopping member, and a flat plate-like dam plate, in which one or a plurality of the plastic pipes are arranged in the vertical direction and adjacent to each other via the width-stopping member. A concrete form in which pipes are connected to each other with bolts and nuts and the back surface of the weir plate is reinforced. An angled extension member is extended to the end of the plastic pipe, and an extension plastic pipe is attached to the angled extension member. Since the back surface of the dam plate having a predetermined angle with respect to the dam plate attached to the plastic pipe is reinforced with the extension plastic pipe, quantification can be achieved as compared with the conventional concrete formwork. In addition, it is a concrete formwork that can be reused many times and is environmentally friendly. Further, since the plastic pipe and the width stop member are connected and integrated by bolts and nuts, distortion and twisting of the entire mold can be minimized. Moreover, by integrating, the formwork main body can be lifted as it is, and work efficiency can be improved. Also applicable when the concrete is heavy.
Can cope with the minute.

Further, in the present invention, it is composed of a long plastic pipe, a width-stopping member, and a flat plate-like dam plate, and one or a plurality of the plastic pipes are arranged in the vertical direction and are adjacent to each other via the width-stopping member. It is a concrete form that connects plastic pipes with bolts and nuts and reinforces the back of the weir plate, and the width stop member has a short rectangular tube shape with the upper and lower ends and one side open, and the open Since the partition wall that partitions the upper and lower ends is provided, the cross-sectional secondary moment of the width stop member can be increased to counter torsional stress, compressive stress, and tensile stress.

  Further, in the present invention, the partition wall is formed in a taper shape having an increased thickness from one open side to the back, so that the concrete that has dropped when the concrete is placed stays in the partition wall portion and is hardened. Can be blocked. Therefore, the process at the time of reusing a formwork becomes easy, and work efficiency can be improved.

  In the present invention, the plastic pipe has a rectangular tube shape, and a plurality of bolt holes are formed at predetermined intervals along the longitudinal direction, so that the weight of the concrete mold can be reduced.

FIG. 1 is a perspective view showing a construction state using a concrete formwork according to the present invention. FIG. 2 is a plan view showing a construction state using the concrete formwork. FIG. 3 is a side view showing a construction state using the concrete formwork. FIG. 4 is a perspective view showing a state in which the plastic pipe and the width stop member constituting the concrete formwork are combined. FIG. 5 is an enlarged perspective view showing a width stop member used for the concrete formwork. FIG. 6 is an enlarged perspective view showing an angled extension member used for the concrete formwork. FIG. 7 is a perspective view showing a construction state using the extension member with the same angle. FIG. 8 is a side view showing a construction state using the concrete formwork.

  In a concrete formwork, it consists of a long plastic pipe, a width stop member, and a flat plate-like dam plate. The plastic pipe and the width stop member are connected together by bolts and nuts to reinforce the back of the dam plate. Therefore, weight reduction can be achieved compared with the conventional concrete formwork.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment. FIG. 1 is a perspective view showing a construction state using the concrete formwork according to the present invention, FIG. 2 is a plan view showing the construction state using the concrete formwork of the present invention, and FIG. 3 uses the concrete formwork of the present invention. It is a side view which shows the constructed construction state. Here, the concrete formwork 10 is composed of a long plastic pipe 11, a width stop member 12, and a flat plate-like dam plate 13, and the plastic pipe 11 and the width stop member 12 are connected by bolts and nuts 14. It is integrated and the back surface of the weir plate 13 is reinforced.

  The plastic pipe 11 has a rectangular tube shape as shown in an enlarged view in FIG. 4 and the like, and a plurality of bolt holes 15 are drilled in the horizontal direction at a predetermined interval along the longitudinal direction, for example, 10 cm pitch. . The bolt hole 15 is formed so as to penetrate in the width direction of the plastic pipe 11. Plastic, which is a thermoplastic resin, is discharged in large quantities as industrial waste and can be collected for each type of material. For example, materials such as polyethylene (PE) and polypropylene (PP) can be used. Moreover, the plastic pipe 11 can also be used by connecting three types of lengths, for example, 0.5 m, 1 m, and 2 m, as appropriate, depending on the required length.

  The plastic pipe 11 can be manufactured by injection molding molten plastic into a mold or the like.

  As shown in FIGS. 4 and 5, etc., the width stop member 12 has a short rectangular tube shape with the upper end 12a, the lower end 12b, and the front side 12c surface opened. Moreover, the partition 16 which divides | segments the open upper end 12a and the lower end 12b is provided, and the partition 16 is formed in the taper shape which increased thickness toward the back from the open front side 12c. That is, the partition 16 has a substantially isosceles triangular cross section. The left and right side walls 17 and 18 are respectively provided with bolt holes 19 penetrating left and right on the upper side and the lower side of the partition wall 16. Further, the side walls 17 and 18 are arranged in parallel. The width stop member 12 also uses waste plastic, and can be manufactured by injection molding molten plastic into a mold or the like.

  As the weir plate 13, a wooden veneer plate, cardboard, a synthetic resin plate, or the like can be used as appropriate. Moreover, the barrier plate 13 may stick a resin film etc. on the surface.

  Next, an assembling procedure of the concrete mold 10 configured as described above will be described. First, as shown in FIGS. 1 to 3, a flat dam plate 13 made of plywood, cardboard, synthetic resin plate or the like is prepared according to the width and height of the concrete to be placed. A reinforcing frame 20 made of wood or the like is fixed to a side end portion of the dam plate 13 and an appropriate position. The reinforcing frame 20 can be made of square material or the like. A nail or the like is used for fixing the reinforcing frame 20 and the barrier plate 13.

  A plastic pipe 11 and a width stop member 12 connected by bolts and nuts 14 are fixed to the back surface of the weir plate 13. In the example shown in FIG. 1, the plastic pipes 11 arranged in the vertical direction are connected to each other in the horizontal direction by bolts and nuts 14 via the width stop members 12.

  Since the concrete mold 10 thus configured is integrated, distortion and twist of the entire mold can be minimized. Moreover, since it was integrated, the whole formwork can be lifted up with a crane etc. as it is, installation in a placement site becomes easy, and work efficiency can be improved. Further, by realizing a light weight, it is possible to carry it in an integrated state, and it is possible to quickly and collectively perform assembly work that has been conventionally performed at the site.

  The concrete mold 10 configured as described above is arranged in a pair at a predetermined interval with the surfaces of the barrier plates 13 facing each other, and then both the concrete molds 10 are fixed by the mold separator 21. The mold separator 21 is fixed to the barrier plate 13, and a mold fastening member 22 is screwed into a screw portion protruding from the back surface of the barrier plate 13, and the pressing member 23 is attached to the mold fastening member 22. The outer butter material 24 made of a steel pipe or the like is fixed by a nut 25 via the. After the reinforcing bars are arranged between the concrete molds thus assembled, the concrete is placed. The placed concrete pressure is received by the outer butter material 24 via the dam plate 13, the plastic pipe 11, and the width stopper member 12. At this time, since the barrier plate 13, the plastic pipe 11, and the width stop member 12 are integrated by the bolts and nuts 14, there is no possibility that the mold is bent. Moreover, it can reduce in weight compared with the past.

  Next, the concrete construction method using the above concrete formwork 10 is demonstrated. The concrete construction method of the present invention is a concrete formwork assembly in which a concrete formwork composed of a long plastic pipe 11, a width stop member 12, and a flat dam plate 13 is connected and integrated by bolts and nuts 14. A process, a mold reinforcement step for connecting the left and right concrete molds 10 with a mold separator 21 and reinforcing them using the outer flap material 24, and a bar arrangement process for arranging reinforcing bars between the left and right concrete molds A concrete placing process for placing concrete in the concrete mold, a mold releasing process for dismantling the concrete mold 10 after the concrete is hardened, a plastic pipe 11 and the width-retaining member. 12 and a disassembling step for disassembling each of the barrier plates 13 and preparing for reuse.

  In the concrete mold assembling step, the concrete mold 10 composed of the long plastic pipe 11, the width stop member 12, and the flat plate-like dam plate 13 is connected and integrated with bolts and nuts 14. The width and height of the concrete mold 10 are determined according to the concrete structure to be constructed. When the concrete structure is thick and the concrete pressure is high, a plurality of plastic pipes 11 are connected together by bolts and nuts 14 and the width stoppers 12 are connected in the lateral direction. By doing in this way, the yield strength with respect to a concrete pressure can be increased. A reinforcing frame 20 made of square material or the like is fixed to the end portion of the barrier plate 13 at a right angle.

  In the mold reinforcement step, the left and right concrete molds 10 assembled in this way are connected by a mold separator 21, and a mold fastening metal fitting 22 is screwed into a screw portion protruding from the back surface of the barrier plate 13. Further, an outer butter material 24 made of a steel pipe or the like is fixed to the mold fastening metal fitting 22 by a nut 25 via a pressing member 23, and the entire mold is reinforced.

  In the bar arrangement process, reinforcing bars (not shown) are arranged between the left and right concrete molds 10.

  In the concrete placing step, concrete is placed in the arranged concrete mold 10 to produce a concrete structure.

  In the mold releasing step, the concrete mold 10 is removed and removed after the concrete is hardened.

  In the dismantling process, the disassembled concrete form 10 is removed from the plastic pipe 11, the width stop member 12, and the weir plate 13 by removing bolts, nuts 14 and nails, and then disassembled to prepare for reuse.

  As described above, according to the concrete construction method using the concrete formwork of the present invention, the efficiency of the concrete placing work can be achieved. In addition, by reusing the concrete formwork, construction that is friendly to the global environment can be realized.

  6 is an enlarged perspective view showing an angled extension member used in the concrete formwork of the present invention, FIG. 7 is a perspective view showing a construction state using the angled extension member of the present invention, and FIG. 8 is the present invention. It is a side view which shows the construction state using the concrete formwork of. The angled extension member 26 has a plate shape made of metal or synthetic resin, and has a predetermined angle θ. The angled extension member 26 has a plurality of bolt holes 27 at the center in the width direction, and the bolt hole row 27a and the bolt hole row 27b also have a predetermined angle θ. The predetermined angle θ can take a value of 30 to 90 degrees, for example. The pitch of the bolt holes 27 is equal to that of the bolt holes 15 formed in the plastic pipe 11. Therefore, it can be easily attached to the plastic pipe 11 with bolts and nuts.

  In FIG. 6, the angled extension member 26 is attached to the end of the plastic pipe 11 with bolts and nuts, and the other plastic pipe 11 can be connected with a predetermined angle. FIG. 7 is a perspective view showing a construction state using the angled extension member 26 according to the present invention. In the present embodiment, an angled extension member 26 is used below the concrete form consisting of the plastic pipe 11 formed in the first embodiment, the width-stopping member 12 and the flat plate-like dam plate 13 to form a plastic. A bolt / nut 29 is connected to the extension plastic pipe 28 under the pipe 11. The connection angle of the extending plastic pipe 28 is the angle of the angled extending member 26. Further, the dam plate 30 is attached along the extending plastic pipe 28. The lower end of the weir plate 30 is bent vertically.

  When comprised as mentioned above, the concrete formwork corresponding to the part from which the thickness changed from the middle of the concrete structure can be comprised. The degree of change in the thickness of the concrete structure can be dealt with by changing the angle of the angled extension member 26. In this way, it is possible to deal with a structure whose thickness is changed with a single concrete formwork.

  In addition, although the above-mentioned plastic pipe demonstrated the case where it was a rectangular tube shape, another cross-sectional shape may be sufficient.

10 Concrete Form 11 Plastic Pipe 12 Width Stopping Member 13 Dam Plate 14 Bolt / Nut 15 Bolt Hole 16 Partitions 17 and 18 Side Wall
19 Bolt hole 20 Reinforcement frame 21 Formwork separator 22 Formwork clamp 23 Holding member 24 Outer material 25 Nut 26 Angled extension member 27 Bolt hole 28 Plastic pipe for extension 29 Bolt / nut 30 Dam plate

Claims (4)

A long plastic pipe,
A width stop member;
Consisting of a flat plate weir,
A concrete mold in which one or a plurality of the plastic pipes are arranged in the vertical direction, and the plastic pipes adjacent to each other are connected with bolts and nuts via the width stop member to reinforce the back surface of the weir plate ,
Extending an angled extension member to the end of the plastic pipe, attaching the extension plastic pipe to the angled extension member,
A concrete formwork characterized in that a back surface of a weir plate having a predetermined angle with respect to a weir plate attached to the plastic pipe is reinforced with an extending plastic pipe . A long plastic pipe,
A width stop member;
Consisting of a flat plate weir,
A concrete mold in which one or a plurality of the plastic pipes are arranged in the vertical direction, and the plastic pipes adjacent to each other are connected with bolts and nuts via the width stop member to reinforce the back surface of the weir plate,
The width stop member has a short rectangular tube shape with upper and lower ends and one side surface opened,
A concrete formwork comprising a partition wall for partitioning the opened upper and lower ends . 3. The concrete formwork according to claim 2 , wherein the partition wall is formed in a taper shape having an increased thickness from one open side surface toward the back . The concrete mold according to any one of claims 1 to 3, wherein the plastic pipe has a rectangular tube shape, and a plurality of bolt holes are formed at predetermined intervals along the longitudinal direction. .

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