Formwork for concrete casting and formwork installation method

Abstract

To enable use of a fork lift easy in utilization as compared to a crane, and improvement of working efficiency of formwork installation by improving use efficiency of a heavy machine.SOLUTION: Formwork 10 for concrete casting to form a rectangular column C comprises a first plate part 20 formed along one surface of the rectangular column C, a second plate part 30 mounted to a side along a height direction of the rectangular column C on the first plate part 20 and formed along an adjacent surface of the rectangular column C, and support tools 40, 70 provided at an opposite side surface as compared with the rectangular column C on the first plate part 20 and having a plurality of fixtures spaced apart in the height direction of the rectangular column C for inserting a pair of forks 207 of a rotary type fork lift 200.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a formwork for pouring concrete, which enables the use of a forklift, which is easier to operate than a crane, thereby improving the efficiency of heavy machinery usage and improving the work efficiency of formwork installation, and to a method of installing the formwork. [Background technology]

[0002] When constructing a concrete structure, various forms are used depending on the shape of the structure (see, for example, Patent Document 1). In addition, a method using a forklift is known as a method for transporting forms for pouring concrete (see, for example, Patent Documents 2 and 3).

[0003] A concrete pouring formwork is used to construct a rectangular column of a reinforced concrete structure. This type of concrete pouring formwork has an L-shaped cross section that runs along the two adjacent sides of the rectangular column. This type of concrete pouring formwork is formed so that the side that corresponds to the height of the column is longer. For this reason, the upper end of the concrete pouring formwork is suspended by a crane and transported to the position where the rectangular column is to be installed.

[0004] After pouring the concrete, the upper end of the concrete pouring formwork was similarly hoisted by a crane and transported to the next concrete pouring location. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-185321 A [Patent Document 2] Japanese Patent Application Publication No. 9-70808 [Patent Document 3] Japanese Unexamined Patent Publication No. 58-179605 Summary of the Invention [Problem to be solved by the invention]

[0006] The above-mentioned method for installing a concrete pouring form had the following problems. That is, when suspending a concrete pouring form with a crane, it is necessary to have sufficient space above it in order to suspend it. In addition, the crane must be sufficiently large compared to the concrete pouring form, and it is necessary to have an installation space. In addition, it is difficult to move the form to another concrete pouring position, which reduces the efficiency of the crane and, as a result, reduces the work efficiency of installing the form.

[0007] The present invention has been made in consideration of such problems, and its object is to provide a concrete pouring formwork that can be positioned and installed at the pouring position of a square column using a rotating forklift instead of a crane, and a formwork installation method using such a concrete pouring formwork. [Means for solving the problem]

[0008] The present invention relates to a formwork for pouring concrete for forming a rectangular pillar, the formwork comprising a first plate portion formed along one of the faces of the rectangular pillar, a second plate portion attached to an edge of the first plate portion along the height direction of the rectangular pillar and formed along another face of the rectangular pillar adjacent to the first face, and a support provided on the face of the first plate portion opposite the rectangular pillar, for inserting a pair of forks of a rotary forklift, the support having a plurality of jigs spaced apart along the height direction of the rectangular pillar.

[0009] The present invention relates to a method of installing forms for forming a rectangular pillar, the method comprising the steps of: a first plate portion formed along one of the faces of the rectangular pillar; and a second plate portion attached to a side of the first plate portion along the height direction of the rectangular pillar and formed along another face of the rectangular pillar adjacent to the one face; a first concrete pouring formwork placed with the first plate portion horizontally is inserted into a first support provided on the first plate portion so that a pair of forks of a rotary forklift are horizontal to each other, the pair of forks are rotated so that they are above and below each other, the first plate portion and the second plate portion are positioned along a portion that will become the rectangular pillar, the pair of forks are removed from the first support, a third plate portion formed along one of the faces of the rectangular pillar; and a fourth plate portion attached to a side of the third plate portion along the height direction of the rectangular pillar and formed along the other face of the rectangular pillar adjacent to the one face; A second concrete pouring formwork is placed with the third plate portion horizontal, and a pair of forks of a rotary forklift are inserted into a second support provided on the fourth plate portion so that they are horizontal to each other, the pair of forks are rotated so that they are above and below each other, the third plate portion and the fourth plate portion are positioned along the portion that will become the square pillar, the pair of forks are removed from the second support, the outer periphery of the first to fourth plate portions is fixed, pre-solidified concrete is poured into the space surrounded by the first to fourth plate portions, after the concrete has solidified, the fixation of the first to fourth plate portions is released, the pair of forks are inserted into the first support and moved away from the square pillar, the pair of forks are rotated so that they are horizontal to each other and removed from the first support, the pair of forks are inserted into the second support and moved away from the square pillar, the pair of forks are rotated so that they are horizontal to each other and removed from the second support. Effect of the Invention

[0010] According to the concrete pouring formwork and formwork installation method of the present invention, a forklift, which is easier to operate than a crane, can be used, improving the efficiency of use of heavy machinery and improving the work efficiency of formwork installation. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a concrete pouring formwork according to one embodiment of the present invention; [Diagram 2] 2 is an enlarged perspective view showing a main part of the concrete pouring formwork. FIG. [Diagram 3] FIG. 2 is a perspective view showing a reinforcing bar structure using the same concrete pouring formwork. [Figure 4] FIG. 2 is a perspective view showing a concrete pouring method using the concrete pouring formwork. [Diagram 5] FIG. 2 is a perspective view showing a concrete pouring method using the concrete pouring formwork. [Figure 6] FIG. 2 is a perspective view showing a concrete pouring method using the concrete pouring formwork. [Figure 7] FIG. 2 is a perspective view showing a concrete pouring method using the concrete pouring formwork. [Figure 8] FIG. 2 is a perspective view showing a concrete pouring method using the concrete pouring formwork. [Figure 9] FIG. 2 is a perspective view showing a concrete pouring method using the concrete pouring formwork. [Figure 10] FIG. 2 is a perspective view showing a concrete pouring method using the concrete pouring formwork. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing a concrete pouring formwork 10 according to one embodiment of the present invention, Fig. 2 is an enlarged perspective view showing a main part of the concrete pouring formwork 10, and Fig. 3 is a perspective view showing a reinforcing bar structure using the concrete pouring formwork 10. In addition, each part in this embodiment is made of metal material in principle unless otherwise specified.

[0013] The concrete pouring formwork 10 shown in FIG. 1 is a concrete pouring formwork for forming a rectangular column C (see FIG. 10) described later. The concrete pouring formwork 10 includes a first plate portion 20 and a second plate portion 30 arranged at right angles to each other and connected at ends along the height direction of the rectangular column C. The first plate portion 20 and the second plate portion 30 may be joined by welding or the like, or may be connected by bolts or the like. The first plate portion 20 corresponds to one surface of the rectangular column C, and the second plate portion 30 is formed to correspond to an adjacent surface of the rectangular column C. A pair of supports 40 are detachably attached to the first plate portion 20, spaced apart in the width direction of the rectangular column C. In addition, a pair of supports 70 are detachably attached to the pair of supports 40, spaced apart in the height direction of the rectangular column C. In addition, 100 in FIG. 1 is a fixing jig used when pouring concrete, described later.

[0014] The first plate portion 20 includes an edge plate 21 corresponding to the height direction of the rectangular column C, and an edge plate 22 corresponding to the width direction of the rectangular column C. Inside the edge plate 21 and the edge plate 22, a partition plate 23 is provided parallel to the edge plate 22, and a partition plate 24 is provided parallel to the edge plate 21. The edge plate 21 is formed with a hole 21a for passing the bolt 25 through. The edge plate 22 is formed with a hole 22a for passing the bolt 25 through. The partition plate 23 is formed with a hole 23a for passing the bolt 25 through. The partition plate 24 is formed with a hole 24a for passing the bolt 25 through. The holes 21a to 24a are circular or elliptical holes.

[0015] These structures provided on the first plate portion 20 may also be provided on the second plate portion 30, but since they have the same structure, detailed explanations will be omitted.

[0016] As shown in FIG. 2, the support 40 includes a rectangular base portion 50 and a rectangular holding portion 60 stacked on the base portion 50. The base portion 50 includes a flange portion 51 provided on an opposing side and formed by bending toward the first plate portion 20, and a flange portion 52 provided in a direction perpendicular to the flange portion 51. A long hole 53 long in the height direction of the rectangular column C is formed at the four corners of the base portion 50. The flange portion 51 includes a slit 51a that fits with the partition plate 24 and a hole portion 51b into which the bolt 25 is inserted. The flange portion 52 includes a slit 52a that fits with the partition plate 23 and a hole portion 52b into which the bolt 25 is inserted.

[0017] The holding part 60 includes a flat plate 61, a flange part 62 provided on the opposing sides of the flat plate 61 and formed by bending toward the first plate part 20, and a cylindrical body 63 arranged at the four corners of the flat plate 61. A screw hole 61a is provided in the center of the flat plate 61, and a bolt 64 is inserted into the screw hole 61a. A fork 207, which will be described later, is inserted into a space (hollow part) partitioned by the flat plate 61, the flange part 62, and the base part 50. With the fork 207 inserted, the bolt 64 is tightened to fix the fork 207 to the base part 50. A bolt 65 is inserted into the cylindrical body 63, and the tip side of the bolt 65 is inserted into the long hole 53 and screwed into a nut (not shown), thereby joining the base part 50 and the holding part 60.

[0018] The support 70 includes a rectangular base portion 80 and a rectangular holding portion 90 stacked on the base portion 80. The base portion 50 includes a flange portion 81 provided on an opposing side and formed by bending toward the first plate portion 20, and a flange portion 82 provided in a direction perpendicular to the flange portion 81. The flange portion 81 is provided with a slit 81a that fits with the partition plate 24 and a hole portion 81b into which the bolt 25 is inserted. The flange portion 82 is provided with a slit 82a that fits with the partition plate 23 and a hole portion 82b into which the bolt 25 is inserted.

[0019] The holding portion 90 includes a flat plate 91 and a flange portion 92 provided on an opposing side of the flat plate 91 and formed by bending towards the first plate portion 20. The lower edge of the flange portion 92 of the holding portion 90 is joined to the base portion 80 by welding or the like, thereby connecting the base portion 80 and the holding portion 90. A screw hole 91a is provided in the center of the flat plate 91, and a bolt 93 is inserted into it.

[0020] A fork 207, which will be described later, is inserted into a space (hollow portion) defined by the flat plate 91, the flange portion 92, and the base portion 80. With the fork 207 inserted, the bolt 93 is tightened to fix the fork 207 to the base portion 80.

[0021] The fixing jig 100 includes an arm 110 arranged along the outer periphery of the first plate portion 20, an arm 120 arranged along the outer periphery of the second plate portion 30, and a metal fitting 130 for connecting these arms 110, 120 at a right angle. Also, a connecting metal fitting 140 for connecting to another fixing jig 100 is detachably attached (see FIG. 9).

[0022] Figure 3 shows the reinforcing bar structure that is the core of the rectangular column C, where B is the foundation, RV is the vertical reinforcing bar, and RH is the horizontal reinforcing bar. There are various reinforcing bar structures, so they are not limited to the structure shown in Figure 3.

[0023] By using the concrete pouring formwork 10 configured in this manner, concrete is poured as shown in Figures 4 to 10. In these figures, reference numeral 200 denotes a rotary forklift. The rotary forklift 200 includes a chassis 201, tires 202 attached to the four corners of the chassis 201, a cabin 203 attached to the upper part of the chassis 201, a lift mechanism 204 attached to the front of the chassis 201, a rotation mechanism 205 that is moved up and down by the lift mechanism 204 and rotates a bracket 206 (described later) around a horizontal axis, a bracket 206 attached to the rotation mechanism 205, and a pair of forks 207 attached to the bracket 206.

[0024] When pouring concrete, as preparation, supports 40, 70 of concrete pouring formwork 10 are fixed to first plate 20 with bolts 25 as shown in Figures 4 and 5. At this time, the position of holding portion 60 of support 40 is adjusted along long hole 53 to match the dimension between the pair of forks 207, and bolt 65 is tightened to fix.

[0025] Next, the concrete pouring formwork 10 is placed on an appropriate table so that the first plate portion 20 is horizontal. The rotation mechanism 205 is operated so that the pair of forks 207 of the forklift 200 are horizontal to each other. Then, the rotary forklift 200 is brought close to the concrete pouring formwork 10.

[0026] 6, the forklift 200 is moved forward and the tip 207a of the fork 207 is inserted into the support 40, 70. Then, the bolts 64, 93 are tightened to fix the fork 207 in the hollow portion of the support 40, 70.

[0027] After fixing, the rotation mechanism 205 is operated as shown in Fig. 7 to rotate the pair of forks 207 in the direction of arrow R in Fig. 7, and rotate the pair of forks 207 by 90 degrees until they are one above the other. As a result, the concrete pouring formwork 10 is oriented vertically.

[0028] Next, while holding the concrete pouring formwork 10 with the pair of forks 207 of the forklift 200, it is brought closer to the reinforcing bar structure of the rectangular column C as shown in Fig. 8. Then, the first plate portion 20 and the second plate portion 30 are positioned so as to face the adjacent wall surface of the rectangular column C. After positioning, the bolts 64, 93 are loosened and the forklift 200 is moved backward to remove the pair of forks 207 from the supports 40, 70.

[0029] Similarly, the remaining surfaces of the rectangular column C are positioned using the concrete pouring formwork 10. As a result, a rectangular formwork is formed around the portion corresponding to the wall surface of the rectangular column C.

[0030] Next, the fixing jig 100 is used to fix the outer periphery of the two concrete pouring forms 10 so that the rectangular form is maintained. Then, unhardened concrete is poured into the form from the nozzle 150. Once the concrete has hardened, the forklift 200 is moved forward and the tip 207a of the fork 207 is inserted into the support 40, 70. Then, the bolts 64, 93 are tightened to fix the fork 207 in the hollow portion of the support 40, 70.

[0031] After fixing, the rotation mechanism 205 is operated in the opposite direction to that in Fig. 7 to rotate the pair of forks 207 in the opposite direction to the direction of arrow R in Fig. 7, and the pair of forks 207 are rotated 90° until they are horizontal to each other. As a result, the concrete pouring formwork 10 is oriented horizontally.

[0032] Next, the forklift 200 is returned to the aforementioned platform while holding the concrete pouring formwork 10 with the pair of forks 207. After returning it onto the platform, the bolts 64, 93 are loosened, and the forklift 200 is moved backward to remove the pair of forks 207 from the supports 40, 70.

[0033] By repeating the above operations, concrete is poured into multiple square columns C.

[0034] Such a concrete pouring formwork 10 can be easily arranged around the square column C by using a rotary forklift 200, so there is no need to use heavy machinery such as a crane. Therefore, the formwork can be transported and arranged in a narrow space compared to a crane. In addition, the efficiency of use of the forklift 200 can be improved, so the efficiency of concrete pouring work can be improved.

[0035] Although the embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to this embodiment and various improvements and modifications can be made without departing from the spirit and scope of the present invention. [Industrial Applicability]

[0036] The present invention can use a forklift, which is easier to operate than a crane, and can improve the efficiency of heavy machinery use and the efficiency of concrete pouring work. It is effective as a formwork for pouring concrete and as a formwork installation method. [Explanation of symbols]

[0037] 10... formwork for pouring concrete, 20... first plate portion, 21... edge plate, 21a... hole portion, 22... edge plate, 22a... hole portion, 23... partition plate, 23a... hole portion, 24... partition plate, 24a... hole portion, 25... bolt, 30... second plate portion, 40... support, 50... base portion, 51... flange portion, 51a... slit, 51b... hole portion, 52... flange portion, 52a... slit, 52b... hole portion, 53... long hole, 60... holding portion, 61... flat plate, 61a... screw hole, 62... flange portion, 63... cylinder, 64... bolt, 65... bolt, 70... support, 80... base part, 81... flange part, 81a... slit, 81b... hole part, 82... flange part, 82a... slit, 82b... hole part, 90... retaining part, 91... flat plate, 91a... screw hole, 92... flange part, 93... bolt, 100... fixing jig, 110... arm, 120... arm, 130... metal fitting, 140... connecting metal fitting, 150... nozzle, 200... forklift, 201... chassis, 202... tire, 203... cabin, 204... lift mechanism, 205... rotation mechanism, 206... bracket, 207... fork, 207a... tip, C... square column.

Claims

1. In a concrete pouring form for forming a square column, A first plate portion formed along any one surface of the rectangular column; A second plate portion is attached to a side of the first plate portion along the height direction of the rectangular column, and is formed along another surface of the rectangular column, the other surface being adjacent to the first surface; A formwork for pouring concrete, characterized in that it is provided on the surface of the first plate portion opposite the square pillar, for inserting a pair of forks of a rotary forklift, and has a support having a plurality of jigs spaced apart along the height direction of the square pillar.

2. The formwork for pouring concrete according to claim 1, characterized in that a plurality of the supports are arranged along the width direction of the square pillar.

3. The first plate portion has a partition plate provided on a surface opposite to the rectangular column, the partition plate being perpendicular to the surface of the first plate portion. The support includes a base portion that is inserted into the partition plate; 2. The formwork for pouring concrete according to claim 1, further comprising a holding portion attached to the base portion and having a hollow portion into which the fork is inserted.

4. The formwork for pouring concrete according to claim 3, characterized in that the position of the holding portion relative to the base portion is formed so as to be adjustable along a direction corresponding to the height direction of the rectangular column.

5. A method for installing a form for forming a rectangular column, comprising the steps of: a first plate portion formed along one of the faces of the rectangular pillar, and a second plate portion attached to the side of the first plate portion along the height direction of the rectangular pillar and formed along the other face of the rectangular pillar adjacent to the first plate portion, the first concrete pouring formwork being placed with the first plate portion horizontal, and a pair of forks of a rotary forklift are inserted into a first support provided on the first plate portion so that they are horizontal to each other; Rotate these pair of forks so that they are above and below each other, The first plate portion and the second plate portion are positioned along the portion that becomes the rectangular pillar, The pair of forks is removed from the first support tool, a second concrete pouring formwork having a third plate portion formed along one of the faces of the rectangular pillar, and a fourth plate portion attached to the side of the third plate portion along the height direction of the rectangular pillar and formed along the other face of the rectangular pillar adjacent to the said face, the second concrete pouring formwork being placed with the third plate portion horizontal, and a pair of forks of a rotary forklift are inserted into a second support provided on the fourth plate portion in a state where they are horizontal to each other; Rotate these pair of forks so that they are above and below each other, The third plate portion and the fourth plate portion are positioned along the portion that becomes the rectangular pillar, The pair of forks is removed from the second support tool, The outer circumferential sides of the first to fourth plate portions are fixed, pouring unsolidified concrete into the space surrounded by the first to fourth plate portions; After the concrete has solidified, the first to fourth plate portions are released from their fixed positions; The pair of forks are inserted into the first support and separated from the rectangular pillar, and then the pair of forks are rotated so that they are horizontal to each other and removed from the first support. A formwork installation method in which the pair of forks are inserted into the second support and moved away from the square pillar, and then the pair of forks are rotated so that they are horizontal to each other and removed from the second support.

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