JP2710012B2 - Construction formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction formwork used for constructing a building foundation, walls and the like with concrete.

[0002]

2. Description of the Related Art In building a foundation, walls and the like of a building with concrete, a frame member is assembled to form a mold, concrete is poured into the mold, and the concrete is hardened. . Conventionally, the above-mentioned frame members depended on Nanyo for the main raw material in terms of cost.
This is a problem as it leads to overforestation of tropical rainforests, and from the perspective of environmental protection on a global scale, it is necessary to reduce the logging of southern timber. The fact is that frame members must be made from raw materials other than South Sea materials.

[0003]

SUMMARY OF THE INVENTION The present invention has been made under the above-mentioned background, and can be constructed without using wood. The construction work is simple and excellent in handleability. It is an object of the present invention to provide a construction form from which members can be easily removed.

[0004]

In order to achieve the above object, a construction form of the present invention is a form used for constructing a building by pouring and hardening concrete. A frame member made of synthetic resin which is opposed to each other to form a space into which the concrete is poured, and which is engaged with each other on each side to form a side wall of the space where the concrete is poured; A metal plate-like connecting member for holding and connecting the frame members on both sides at a predetermined interval; and a through groove for penetrating a projecting piece formed at a side end of the connecting material in the one or both frame members. Wherein the tip of the protruding piece exposed to the outside through the through groove is fixed by twisting.

[0005] It is preferable that the connecting member is formed with contact pieces that contact the back surfaces of the frame members on both sides.

In addition, instead of forming a through groove directly in the frame member, a receiving member is fitted into a fitting hole formed in the frame member, and the projecting piece is passed through the receiving member. May be formed.

Further, instead of forming a protruding piece on the connecting member, a T-shaped insertion portion is formed on one or both sides of the connecting member, while a T-shaped insertion portion is formed vertically in the frame member and is formed on a lower surface. The open T-shaped insertion groove may be formed so that the side cross section becomes wedge-shaped, and the insertion portion of the connecting member inserted into this insertion groove may be fixed by a wedge member.

[0008]

According to the construction form of the present invention, when connecting the connecting member to the frame member on one or both sides, the projecting piece formed at the side end of the connecting member is connected to the frame. The frame member and the connecting member are connected by penetrating the through groove of the member and twisting and fixing the end of the protruding piece at the side end of the connecting member exposed to the outside. After the concrete is hardened, the projecting piece can be pulled out from the through groove by twisting the projecting piece in the opposite direction, so that the frame member can be removed from the concrete.

[0009] In this way, it is possible to assemble the mold without the use of wood from the frame member is made of a synthetic resin, in addition to lightweight transportation and handling becomes easy since attained, or twisting the protruding pieces Since the work of returning can be easily performed, the work of attaching and detaching the frame member can be easily performed, and the construction work is simple and the handleability is excellent.

Furthermore, since the connecting member is composed of a metal plate, it is possible to inexpensively manufacture, good bonding strength between the concrete, can be kept high strength of the whole concrete structure, durability .

According to construction formwork according to claim 2, wherein the contacting piece of the connecting member to fulfill its contact with angle brace features on the rear surface of each side of the frame member, the distortion of the frame member connecting member is valid Is prevented.

According to construction formwork according to claim 3, since a structure through which the protrusion of the coupling member into the through groove of the receiving member fitted to the frame member, without damaging the outer frame member, the outer Since the durability of the frame member is increased and the number of times of repeated use can be improved, the economic efficiency can be improved.

According to the construction formwork of the fourth aspect, since the frame member can be attached and detached by attaching and detaching the wedge member, construction of the formwork is easy.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a construction formwork of the first embodiment, and the construction formwork 1 is an outer frame member 2 opposed to a side wall for forming a space into which concrete (not shown) is poured. And an inner frame member 3, an outer frame member 2, and a connecting member 4 for connecting the inner frame member 3 to each other.

The outer frame member 2 is made of a synthetic resin foam such as polypropylene or waste plastic, and is formed in a substantially rectangular shape as shown in FIG. This outer frame member 2 is formed with a continuous engaging projection 5 at a central portion from the upper surface to one side surface,
A continuous engaging concave portion 6 is formed at a central portion from the bottom surface to the other side surface, and concave portions 7 are formed at predetermined intervals in a longitudinal direction near the upper and lower portions on the surface, and a handle is provided on both sides near the center. Recesses 8 are provided side by side. As shown in FIGS. 3A and 3B, the concave portion 7 is a cylindrical concave portion formed on the surface of the outer frame member 2, and has a vertically long through groove 7a extending from the bottom of the concave portion to the back surface of the outer frame member 2. Is formed.

The inner frame member 3 is made of a synthetic resin foam such as polypropylene or waste plastic, and is formed in a substantially rectangular shape as shown in FIG. The inner frame member 3 is formed with a continuous engaging projection 5 at a central portion from the upper surface to one side surface,
A continuous engaging recess 6 is formed at the center from the bottom surface to the other side surface, and an insertion groove 10 having a T-shaped cross section is formed at a predetermined interval from the bottom surface to substantially the upper center as shown in FIG. This insertion groove 10 is open on the lower surface and the rear surface.

As shown in FIG. 6, the connecting member 4 is a metal plate such as an iron plate or a tin plate, and is formed in a substantially rectangular shape. A rectangular opening 11 is formed in the center. Notches 12 are formed inward in the direction, and projecting pieces 13 extend outward from the upper and lower ends in the longitudinal direction.
The protrusion 13 has a substantially semicircular bulging portion 14 formed at the tip thereof. Further, right and left triangular contact pieces 15 are formed at the upper and lower ends of both sides of the connecting member, respectively. Inside the contact pieces 15, a support portion 16 and a support groove 17 for supporting a reinforcing bar are provided. It is formed in two places.

When the connecting member 4 is used, as shown in FIG. 7, it is bent right and left from the cut 12 to form a substantially T-shaped insertion portion 18 in plan view.
5 is bent at a right angle in the horizontal direction.

Since the construction form 1 is constructed as described above, in assembling it, a release agent is applied to the back surface of the outer frame member 2 and, as shown in FIG. The protruding piece 13 provided in the portion is made to pass through the through groove 7 a of the outer frame member 2, and the bulging portion 14 is protruded into the concave portion 7. afterwards,
A fitting hole 21 into which the bulging portion 14 is fitted as shown in FIG.
The jig 20 having a substantially T-shaped appearance formed at the end is inserted into the recess 7, and the fitting hole 21 is formed in the bulging portion 14 of the connecting member 4.
After being fitted to the cable, it is prevented from coming off by being twisted by about 45 degrees to 90 degrees and fixed (see FIG. 8). At this time, the contact piece 15 is engaged with the back surfaces of the frame members 2 and 3, and the outer frame member 2 is fixed in a state of being sandwiched between the bulging portion 14 of the connecting member 4 and the contact piece 15.

Meanwhile, the insertion portion 18 of the inner frame member 3 to the connecting member 4 by inserting the other side of the insertion portion 18 of the connecting member 4 from the opening on the bottom of the insertion groove 10 of the inner frame member 3 abutting piece 15 Fix with. As described above, the basic form can be formed by connecting and holding the outer frame member 2 and the inner frame member 3 with the connecting member 4.

Furthermore, the basic mold in the vertical or horizontal direction by engaging the engaging recess 6 engaging projection 5 formed on Ryowaku members 2 and 3 relative to the other of the frame members 2, 3 It can be connected to form a mold as shown in FIG.

[0022] Incidentally, each support groove of the upper and lower of the coupling member 4 17
Can be fixed by bending the support portion 16 in the vertical direction. Note that a vertical reinforcing bar (not shown) can be fixed by bending the supporting portion 16 in the horizontal direction.

Next, space is cured by pouring concrete between said outer frame member 2 and the inner frame member 3, then inserted into the jig 20 again recess 7, a fitting hole of the tip 2
1 is fitted into the bulging portion 14, and then the bulging portion 14 is returned to the vertical state by twisting in the direction opposite to the fixed direction, and then the outer frame member 2 is removed, thereby completing the concrete structure. Since the object is exposed, the protruding piece 13 of the connecting member 4 protruding from the concrete structure is cut from the root.

[0024] Incidentally, the protrusion 13 may be utilized as a bracket for fixing the external wall plate (not shown) without cutting. In addition, the inner frame member 3 can be used as a heat insulating material by leaving the inner frame member 3 without removing it. But,
A release agent may be applied to the back surface of the inner frame member 3 and removed by pulling it up. However, when the inner frame member 3 is also removed, the connection with the connecting member 4 is preferably configured in the same manner as the outer frame member 2.

[0025] As described above, according to the above construction formwork 1, connecting member 4 can be shaped by punching an iron plate and tin plate with a press, the contact piece 1 of the connecting member 4
Since it can be used by bending the insert 5 and the insertion portion 18, it is easy and inexpensive to manufacture, has good binding strength to concrete, and can maintain high strength and durability of the entire concrete structure. it can.

After projecting pieces 13 provided on the upper and lower portions on both sides of the connecting member 4 penetrate through the through groove 7a of the outer frame member 2 and project the projecting projection 14 into the concave portion 7, the jig 20 The outer frame member 2 is fixed by fitting the fitting hole 21 at the distal end into the bulging portion 14 and twisting, and then the inner frame member 3 is inserted into the insertion portion 18 from the lower surface opening of the insertion groove 10. Since the mold can be formed, the assembling work can be easily performed.

Furthermore, the frame member to each other can be easily performed connection to vertical or horizontal directions by engaging an engaging concave portion 6 and the engaging portion 5 provided on the frame member. Since the frame members 2 and 3 are made of synthetic resin foam material and are not made of wood, they contribute to the protection of the global environment, and can be lightened so that they can be easily transported and handled. Economic effect can be obtained.

Further , since the contact piece 15 of the connecting member 4 comes into contact with the back surfaces of the frame members 2 and 3 on both sides to perform the function of firing, the distortion between the frame members 2 and 3 and the connecting member 4 is effectively prevented. Is done.

Furthermore, since the connecting member 4 is composed of a metal plate, it is possible to inexpensively manufacture, good bonding strength between the concrete strength of the whole concrete structure, to be kept high durability it can.

The projecting pieces 13 may be formed at both ends of the connecting member 4 and the inner frame member 3 may be replaced with the outer frame member 2 so that both side surfaces of the concrete structure can be exposed. Further, the bulging portion 14 may be directly exposed on the surface of the outer frame member 3 without forming the concave portion 7.

Next, in FIG. 10 (a) second embodiment, to form a fitting hole 26 for fitting the receiving member 25 in the outer frame member 2.

As shown in FIG. 10 (b), the receiving member 25 is formed of a synthetic resin or metal into a cylindrical shape, and the length of the cylindrical member is the same as the thickness of the outer frame member 2, and one end is entirely formed. At the opening,
A flange 25a is formed on the periphery, the other end has the same thickness as the interval between the protruding portion 14 of the connecting member 4 and the contact piece 15, and a vertically long through groove 25b is formed in the center of the bottom surface. I have. The through groove 25b is formed in a size that allows the bulging portion 14 of the connecting member 4 to penetrate.

When assembling the formwork, the receiving member 2
After the receiving member 25 is fitted into the fitting hole 26 of the outer frame member 2 until the flange 25a of the fifth member 5 hits the surface of the outer frame member 2, the projecting piece 13 of the connecting member 4 passes through the through groove 25b of the receiving member 25. After the protrusion 14 is made to protrude into the receiving member 25, the protrusion 14 is twisted by the jig 20 so that the outer frame member 2 is connected to the connecting member 4, and the protrusion 14 and the contact piece 15 are Can be fixed.

The inner frame member 3 may be fixed in the same manner as in the first embodiment, or may be configured in the same manner as the outer frame member 2.

The concrete is poured into the space between the frame members of the formwork having the above-described structure and hardened, and then the protrusion 14 is returned to remove the receiving member 25 and the outer frame member 2 and dismantled, as shown in FIG. ), The concrete structure 27 is exposed.
The protruding piece 13 of the connecting member 4 protruding from the connecting member 4 may be cut or left for attaching an exterior material.

Furthermore, Figure 11 the receiving member 25 (b)
As shown in FIG. 11, by making the length of the cylinder larger than the thickness of the outer frame member 2, after assembling as shown in FIG. 11A, concrete is poured and hardened, and then the outer frame member 2 is removed. Fig. 11
As shown in (c), the projecting piece 13 of the connecting member 4 is buried below the surface of the concrete structure, so that the cement 27
By backfilling with a, the projection 13 does not need to be cut, and the projection 13 is not exposed on the surface of the concrete structure, so that the appearance is improved and oxidation is difficult.

[0037] According to construction formwork 1 of the second embodiment described above, connecting the protruding piece 13 by selecting the receiving member 25 on whether or not to protrude from the concrete structure, a common outer frame member 2 Since the material 4 can be used, the operation efficiency is good.
In addition, since the bulging portion 14 of the connecting member 4 is twisted inside the receiving member 25, the outer frame member 2 is not damaged and the outer frame member 2 is not damaged.
The durability can be increased, and the number of times of repeated use can be improved, so that the economy can be improved.

[0038] Further, FIG. 12 (a) (b) the third in the embodiment, the outer frame member 2 formed of synthetic resin foam material such as polypropylene or plastics the frame body 30 and the wedge member 3
The frame main body 30 is formed with an insertion groove 32 having a substantially T-shaped cross section at a predetermined interval from the bottom surface to the upper surface. The side section is formed in a wedge shape so as to spread toward the upper surface.

As shown in FIG. 13, the wedge member 31 is formed of a synthetic resin such as plastic in a wedge shape, and has an engagement groove 33 formed from the lower surface to the vicinity of the upper surface.

The connecting member 4 has an insertion portion 18 having a substantially T-shape in plan view at both ends. This insertion portion 18 is the same as the insertion portion 18 of the connecting member 4 described in the first embodiment.

When assembling the formwork, FIG.
As shown in (a), after inserting one insertion portion 18 of the connecting member 4 from above the insertion groove 32 of the frame body 30, the wedge member 31 is inserted.
Is inserted between the inclined surface 32 a of the insertion groove 32 and the insertion portion 18 of the connecting member 4 to fix the connecting member 4.

The inner frame member 3 may be fixed in the same manner as in the first embodiment, or may be configured in the same manner as the outer frame member 2.

In this state, concrete is poured into the space of the frame member and hardened, and then the wedge member 31 is pulled out upward as shown in FIG.
Can be dismantled by pulling it upward while tilting it toward you. Since the concrete structure is exposed by dismantling, the insertion portion 18 of the connecting member 4 protruding from the concrete structure is cut from the root.

[0044] According to the third embodiment described above, by attaching and detaching the wedge member 31, since it is assembly and disassembly of the mold, without the need for special tools, it is possible to improve work efficiency. In addition, since the user once tilts it forward and pulls it upward, it is much easier than the effort of pulling it up.

Further, since the frame main body 30 is not damaged, the durability of the frame main body 30 is increased, and the number of times of repeated use can be improved, so that the economic efficiency can be improved .

[Brief description of the drawings]

FIG. 1 is a perspective view of a construction formwork of the present invention.

FIG. 2 is a perspective view of an outer frame member.

FIGS. 3A and 3B are a front view and a cross-sectional view of the outer frame member.

FIG. 4 is a perspective view of an inner frame member.

FIG. 5 is a sectional view of the inner frame member.

FIG. 6 is a side view of the connecting member.

FIG. 7 is a perspective view showing a state after molding of the connecting member.

FIG. 8 is a side view showing a state where the outer frame member and the inner frame member are connected by a connecting member.

FIG. 9 is a perspective view of a detachable tool.

FIGS. 10A, 10B, and 10C are explanatory views of a receiving member and use of the receiving member.

11 (a), (b) and (c) are explanatory views of another receiving member and the use of the receiving member.

12A and 12B are side views showing another embodiment of the outer frame member.

FIG. 13 is a perspective view of a wedge member inserted into the outer frame member.

FIGS. 14A and 14B are explanatory views of use of the above embodiment.

[Description of Signs] 1 Construction formwork 2 Outer frame member 3 Inner frame member 4 Connecting material 5 Engagement convex part 6 Engagement concave part 7a Through groove 10 Insertion groove 13 Protrusion piece 15 Contact piece

Claims (4)

(57) [Claims] 1. A formwork used in pouring and hardening concrete to construct a building, said forms facing each other to form a space for pouring concrete and engaging with each other on each side. A synthetic resin frame member forming the side wall of the concrete pouring space, and a metal plate-like connecting member disposed between the frame members and holding and connecting the frame members on both sides of the space at a predetermined interval. The frame member on one side or both sides has a through groove through which a protruding piece formed at a side end of the connecting member is penetrated, and a tip of the protruding piece exposed to the outside through the through groove is provided. A construction formwork characterized by being twisted and fastened. 2. The construction formwork according to claim 1, wherein the connecting member is formed with contact pieces that contact the back surfaces of the frame members on both sides. 3. A through-groove in which a receiving member is fitted in a fitting hole formed in the frame member instead of directly forming a through-groove in the frame member, and the projecting piece is passed through the receiving member. The construction formwork according to claim 1, wherein the construction formwork is formed. 4. A T-shaped insertion portion is formed on one or both sides of the connecting member instead of forming a protruding piece on the connecting member, and is formed vertically in the frame member and formed on a lower surface. The T-shaped insertion groove that opens is formed so that the side cross section becomes wedge-shaped, and the insertion portion of the connecting member inserted into the insertion groove is fixed by a wedge member. The construction formwork according to any one of the above.