JP6701236B2 - Concrete formwork - Google Patents

Description

  The present invention relates to a concrete formwork in which concrete formwork material is left and integrated with a concrete structure in a concrete building such as a general house, a condominium or an office building.

  Generally, in the construction of concrete buildings, wooden formwork materials are held at intervals in the thickness direction with a separator, concrete is placed in the formwork, and the formwork is removed after the curing period has elapsed. ing.

  However, when using wooden formwork materials like this, it is necessary to dismantle the formwork and remove the formwork materials after the concrete has hardened, which complicates on-site work and also from the perspective of nature protection. There is a demand for a construction method that does not use the formwork material.

  Therefore, there is known a concrete formwork in which a concrete formwork material is used instead of a wooden formwork material, and the formwork material is left after the concrete is placed to be integrated with a concrete structure. (For example, refer to Patent Document 1.).

  According to this concrete formwork, since the formwork material is left after the concrete is placed, there is no need to remove it like a wooden formwork material, and labor saving on site work can be achieved, and Since wood is not used, there is an advantage that it is preferable in terms of nature protection.

Japanese Utility Model Publication No. 6-73202

  However, even when the concrete form material is used as described above, it is necessary to hold the form material by the separator at intervals and to support the whole formwork. For this reason, although the formwork is left after the concrete is hardened, it is necessary to dismantle and remove the support work, but since the support work consists of many complicated members such as joists, large pulls, columns, etc. Since the dismantling and removal work requires time and labor, there has been a problem that it is not possible to sufficiently save labor in the field work.

  The present invention has been made in view of the above problems, and an object thereof is to eliminate the need to remove the formwork material, and to disassemble and remove the member for supporting the formwork material. To provide concrete formwork.

In order to achieve the above-mentioned object, the present invention arranges a plurality of concrete plates so that their end faces are in contact with each other, and holds concrete plates facing each other in the thickness direction at intervals with a separator in the facing direction. By forming a mold part by forming a concrete structure by placing concrete in the mold part, in the concrete form mold so that each concrete plate is left to be integrated with the concrete structure, is disposed inside the mold portion, the separators between concrete plate adjacent to the arrangement direction a connecting member for connecting inside the molding part together, a plurality of holes for inserting the separator into the coupling member , A structure in which the separators are connected to each other by inserting separators of a plurality of concrete plates that are adjacent to each other in the arrangement direction into the holes of the connecting member, and the connecting member is formed at an arbitrary position in the axial direction of the separator. A pair of shafts, one end of each of which is fixed to concrete plates arranged to face each other in the thickness direction, and the other end of which is the other end of each shaft. And a space adjusting member that is respectively screwed into the shaft.

  As a result, a concrete structure is formed by placing concrete in the form part formed by each concrete plate, and each concrete plate is left and integrated with the concrete structure. It is not necessary to remove the form material after hardening the concrete, and it is not necessary to disassemble and remove a complicated member for supporting the form material. In this case, since the concrete plates are fixed by connecting the separators of the concrete plates adjacent to each other with the connecting member, it is not necessary to directly fix the concrete plates. Further, since the separators are connected to each other inside the mold part by the connecting member, each connecting member is not exposed to the outside of the mold part.

  According to the present invention, it is not necessary to remove the formwork material after hardening the concrete, and it is not necessary to disassemble and remove a complicated member for supporting the formwork material, which saves labor on site. It can be achieved enough. In this case, since it is not necessary to directly fix the concrete plates to each other, it is not necessary to perform processing for directly fixing the concrete plates to each other, and the structure of the concrete plates can be simplified. Further, since the connecting member that connects the separators to each other is not exposed to the outside of the mold part, there is an advantage that the appearance of the concrete structure is not damaged by the exposure of the connecting member.

The perspective view of the concrete formwork which shows the 1st Embodiment of this invention. Sectional plan view of the main part of concrete formwork Front view showing the inside of concrete formwork Side sectional view of the space adjusting member Perspective view of the first connecting member Perspective view of the second connecting member Exploded plan sectional view of the main part of concrete formwork Exploded perspective view of main parts of concrete formwork Exploded perspective view of essential parts of concrete formwork The principal part plane sectional view of the concrete formwork which shows the 2nd Embodiment of this invention.

  1 to 9 show a first embodiment of the present invention, and show a concrete formwork in which a concrete plate forming a formwork portion is left and integrated with a concrete structure.

  The concrete formwork shown in the figure is adjacent to each other with a plurality of concrete plates 1 arranged vertically and horizontally so that their end faces abut each other, a separator 2 holding the concrete plates 1 at intervals in the thickness direction. A first connecting member 3 that connects the four separators 2 of the four matching concrete plates 1 to each other, and a second connecting member 4 that connects the two separators 2 of the two concrete plates 1 that are adjacent to each other are provided. There is.

  The concrete plate 1 is made of plate-shaped concrete that has been molded in advance in a factory or the like, and is formed in, for example, a horizontally long rectangular shape. Embedded nuts 1a for fixing the separators 2 are provided at the four corners of the concrete plate 1, and each embedded nut 1a is embedded in the concrete plate 1 so that one end surface is exposed on one side in the thickness direction of the concrete plate 1. ing.

  The separator 2 is composed of a pair of shafts 2a each having one end fixed to the concrete plates 1 arranged to face each other, and a space adjusting member 2b for adjusting an axial space between the shafts 2a, and a space adjusting member 2b. By rotating the shafts 2a with respect to the shafts 2a, the shafts 2a approach or separate in the axial direction. The shaft 2a is formed of a ball screw having a threaded portion on the outer peripheral surface, and one end of the shaft 2a is screwed into the embedded nut 1a of the concrete board 1. In this case, each shaft 2a is fixed to the concrete plate 1 by abutting and tightening the first fixing nut 2c screwed onto each shaft 2a to the embedded nut 1a. The space adjusting member 2b is a cylindrical member having a threaded portion on its inner peripheral surface, and both ends thereof are respectively screwed into the other ends of the shafts 2a. In this case, as shown in FIG. 4, the screw portion 2b-1 on the one end side in the axial direction and the screw portion 2b-2 on the other end side in the axial direction of the interval adjusting member 2b have opposite spiral directions. When the member 2b is rotated, the shafts 2a move in mutually opposite axial directions.

  The first connecting member 3 is formed in a square plate shape and has four holes 3a through which the shafts 2a of the four separators 2 are inserted.

  The second connecting member 4 is formed in a rectangular plate shape and has two holes 4a through which the shafts 2a of the two separators 2 are inserted.

  When constructing a building wall using the concrete formwork having the above-described configuration, first, the shaft 2a of the separator 2 is screwed into the embedding nut 1a of the concrete plate 1 and the first fixing nut 2c is embedded. The shaft 2a is fixed to the concrete board 1 by bringing it into contact with 1a and tightening it. Next, the separators 2 of the concrete plates 1 that are adjacent to each other in the vertical and horizontal arrangement directions are connected to each other by the first connecting member 3 or the second connecting member 4. In this case, at the location where the four concrete plates 1 are adjacent to each other, the shafts 2a of the four separators 2 are inserted into the respective holes 3a of the first connecting member 3, and at the location where the two concrete plates 1 are adjacent to each other, The shafts 2a of the two separators 2 are inserted into the holes 4a of the second connecting member 4, respectively. Further, second fixing nuts 2d screwed onto the shaft 2a are arranged on both sides in the thickness direction of the first connecting member 3 or the second connecting member 4, respectively, and each second fixing nut 2d is attached to the first connecting member 2d. The first connecting member 3 or the second connecting member 4 is fixed to the shaft 2a by tightening the connecting member 3 or the second connecting member 4 so as to sandwich it. At that time, the first connecting member 3 or the second connecting member 4 is fixed to any position in the axial direction of the shaft 2a by the tightening position of each second fixing nut 2d.

  As described above, the concrete plates 1 arranged vertically and horizontally are connected by the connecting plates 3 and 4, and the space adjusting members 2b are screwed to the shafts 2a of the concrete plates 1 facing each other in the thickness direction. , The shafts 2a are connected to each other via the space adjusting member 2b. As a result, the concrete plates 1 arranged vertically and horizontally are fixed to each other, and the concrete plates 1 facing each other in the thickness direction are held by the separator 2 at intervals in the facing direction. The mold part 5 is formed. In this case, the gap between the concrete plates 1 facing each other is adjusted to be a predetermined gap by rotating the gap adjusting member 2b to change the overall length of the separator 2 in the axial direction.

  Concrete in which the reinforcing bars (not shown) are placed inside the formwork portion 5 formed as described above, concrete is placed, and the concrete board 1 is left after the concrete is hardened, the concrete board 1 is integrated. A structure (wall) is formed. In this case, since the connecting plates 3 and 4 are arranged inside the mold part 5, the connecting plates 3 and 4 are not exposed to the outside.

  As described above, according to the present embodiment, the concrete plates 1 are arranged vertically and horizontally so that the end faces of the concrete plates 1 contact each other, and the concrete plates 1 facing each other in the thickness direction are moved in the facing direction by the separator 2. Molds formed by the concrete plates 1 by holding the separators at intervals and connecting the separators 2 of the concrete plates 1 adjacent to each other inside the form frame portion 5 by the first connecting member 3 or the second connecting member 4. Since the concrete structure is formed by forming the frame portion 5 and placing concrete in the form frame portion 5, each concrete plate 1 is left and integrated with the concrete structure. It is not necessary to remove the formwork material after hardening the concrete, and it is not necessary to dismantle and remove the complicated members that support the formwork material, and it is possible to achieve sufficient labor saving on site work. it can.

  In this case, since the separators 2 of the concrete plates 1 adjacent to each other are connected by the connecting members 3 and 4, the concrete plates 1 arranged vertically and horizontally are fixed, so that the concrete plates 1 are connected to each other. There is no need to fix it directly. That is, when the concrete plates 1 are directly fixed to each other, for example, it is necessary to perform a process for connecting the fixing members to the concrete plates 1. However, in the present embodiment, such a process is not required. The structure of the plate 1 can be simplified.

  Furthermore, since the separators 2 are connected to each other inside the mold part 5 by the connecting members 3 and 4, the connecting members 3 and 4 are not exposed to the outside of the mold part 5, and the connecting members 3 and 4 are not exposed. There is also an advantage that the appearance of the concrete structure is not damaged by the exposure of No. 4.

  In addition, the separators 2 are provided at the four corners of the quadrangular concrete plate 1 so that the nearest separators 2 of the concrete plates 1 adjacent in the arrangement direction are connected by the first connecting member 3 or the second connecting member 4. Therefore, the connecting plates 3 and 4 can be downsized, and the structure can be simplified.

  In this case, a plurality of holes 3a and 4a through which the shaft 2a of the separator 2 is inserted are provided in each connecting member 3 and 4, and the shafts 2a of the separator 2 are inserted into the holes 3a or the holes 4a to connect the separators 2 to each other. Therefore, the separators 2 can be easily connected to each other, and the connecting work of the separators 2 by the connecting members 3 and 4 can be efficiently performed.

  Moreover, since the connecting members 3 and 4 are configured to be fixed at arbitrary positions in the axial direction of the shaft 2a, the thickness of the concrete plates 1 adjacent to each other can be adjusted by shifting the connecting members 3 and 4 in the axial direction of the shaft 2a. It is possible to perform directional alignment, and the concrete plates 1 can be arranged so as not to cause a step on the surface of the concrete structure.

  Further, the separator 2 has a pair of shafts 2a each having one end fixed to the concrete plates 1 arranged to face each other in the thickness direction, and a gap adjusting member whose both ends are screwed to the other end of each shaft 2a. 2b, each of the shafts 2a is configured to approach or separate in the axial direction by rotating the space adjusting member 2b around the axis of each shaft 2a. The distance between the concrete plates 1 in the facing direction can be changed, and the adjustment work by the distance adjusting member 2b can be efficiently performed.

  FIG. 10 shows a second embodiment of the present invention, and the same components as those of the first embodiment are designated by the same reference numerals.

  The concrete formwork of this embodiment includes an anchor member 6 integrated with the cast concrete in the formwork portion 5. The anchor member 6 is made of a metal mesh, a reinforcing bar, a metal fiber, or the like, a part of which is embedded in the concrete plate 1, and the other part is one surface of the concrete board 1 (the inner surface of the mold part 5). Exposed to the side. The anchor member 6 has substantially the same vertical dimension as one surface of the concrete board 1, and in the process of manufacturing the concrete board 1, about half of the thickness direction is arranged in the concrete board 1 before hardening, It is integrated with the concrete board 1 after hardening.

  In this embodiment, when concrete is poured into the mold part 5 formed by the concrete plate 1, the exposed portion of the anchor member 6 of the concrete plate 1 is placed in the concrete in the mold part 5 and hardened. It is integrated with the cast concrete.

  As described above, according to this embodiment, the concrete plate 1 is provided with the anchor member 6 partially embedded in the concrete plate 1, and the other part of the anchor member 6 is arranged in the cast concrete in the form part 5 and hardened. Since the subsequent casting concrete and the anchor member 6 are integrated, each concrete plate 1 and the casting concrete in the form part 5 can be firmly connected, and the strength of the entire concrete structure can be improved. Can be increased.

  DESCRIPTION OF SYMBOLS 1... Concrete board, 2... Separator, 2a... Shaft, 2b... Space|interval adjusting member, 3... 1st connection member, 3a... Hole, 4... 2nd connection member, 4a... Hole, 5... Form part, 6 ...Anchor member.

Claims (3)

Forming a mold part by arranging a plurality of concrete plates so that their end faces abut each other, and holding concrete plates facing each other in the thickness direction with a separator in a facing direction at intervals. In a concrete formwork that forms a concrete structure by placing concrete in the section and leaves each concrete plate to integrate with the concrete structure,
Is disposed inside the molding part comprises a connecting member for connecting inside the molding part of the separators between concrete plate adjacent to the array directions,
The connecting member is provided with a plurality of holes through which the separators are inserted, and the separators are connected to each other by inserting the separators of a plurality of concrete plates adjacent to each other in the arrangement direction into the holes of the connecting member. The member is configured to be fixed at an arbitrary position in the axial direction of the separator at a distance from the inner surface of the mold part,
The separator is formed of a pair of shafts each having one end fixed to concrete plates arranged to face each other in the thickness direction, and a gap adjusting member in which both end sides are respectively screwed into the other end side of each shaft,
A concrete formwork characterized in that each shaft is configured to approach or separate in the axial direction by rotating the space adjusting member with respect to each shaft. Providing the separator at the four corners of a rectangular concrete plate,
The concrete formwork according to claim 1, wherein the connecting member is formed so as to connect the closest separators of the concrete plates adjacent to each other in the arrangement direction. The concrete formwork according to claim 1 or 2 , further comprising an anchor member, a part of which is embedded in the concrete plate and the other part of which is placed in the cast concrete in the formwork part.

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