JPH0571172A - Permanent formwork frame - Google Patents

Abstract

PURPOSE:To save labor for assembling work of a formwork of light weight and excellent mechanical strength by supporting a permanent formwork with a frame provided with a flat plate part supporting shedthing boards, a sheathing board holding part. and flat plate reinforcing parts. CONSTITUTION:A frame 5 for-a permanent formwork provided with a flat plate part 1 supporting sheathing boards such as cement plates, a sheathing board holding part 2 formed around the former and composed of pr-projections and linear projections and the like, and flat plate reinforcing parts 4a, 4b composed of ribs and the like formed on the back of the flat plate part 1, is formed. Next, the sheathing boards are received with the sheathing board holding part 2 of the permanent formwork frame 5 so as to contact the front side of the sheathing board with the flat plate part 1 in the formed frame, pinchedly held with sheathing board fixing tools, and oppositely arranged putting a concrete placing part between. Next, separators are arranged on respective recessed parts 3, longitudinal and lateral batters are provided, the frame 5 is fixed with form ties, and the sheathing board fixing tools are removed. After temporarily fixing them to frame positioning parts 21 with bolts, fresh concrete is placed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent formwork supporting a permanent formwork made of clapboard or the like used in the construction of reinforced concrete buildings such as buildings and condominiums and in the construction of concrete structures such as road slope protection. The present invention relates to a formwork frame.

[0002]

2. Description of the Related Art Conventionally, when building slopes such as buildings and roads having a reinforced concrete structure on site, the foundation of the buildings,
The columns, beams, walls, floor slabs, slopes, etc. are constructed by placing concrete in the formwork. Although concrete is a structural material that has a very strong compressive force when it hardens, fresh concrete is a fluid. In order to make this fluid into the shape and dimensions specified in the blueprint, such as columns and beams, form a mold, place concrete in it, and remove the form when the specified concrete strength is reached. Is done by. The formwork is a temporary structure, but since concrete with a high specific gravity of 2.4 enters the formwork, it is required that the formwork has a solid structure that is easy to assemble and disassemble. Therefore, concrete panels reinforced with various mechanical strengths such as a wooden plywood with a thickness of 12 mm to 24 mm, which is nailed with a splint, a wooden standard length panel, a metal panel, etc. are used as a formwork.

The conventional formwork will be described below. Figure 5
[Fig. 3] is a perspective view of a conventional formwork in which a splint is cast and formed on a concrete panel. 31 is a concrete panel made of lauan plywood with a front plate and a back plate bonded and fixed via a core plate, 3
Reference numeral 2 is a horizontal peg, 33 is a vertical peg, and 34 is a formwork.

The method of using the conventional formwork constructed as described above will be described below. FIG. 6 is a perspective view of a main part at the time of construction using a mold made of a concrete panel. Reference numeral 35 is a horizontal end thick material made of a round pipe supporting the form 34 to form a concrete wall having a thickness as designed against the back pressure of concrete, 36 is a vertical end thick material made of a round pipe, and 37 is a foam Ties, 38 is a separator, and 39 is a bar arrangement. Arrange the front and rear molds 34 according to the wall thickness according to the wall thickness, and while assembling the molds 34 with the horizontal end thick material 35 and the vertical end thick material 36, line up the molds 34 closely and tighten them at the required points. After fixing with metal fittings or foam ties 37 and separators 38 and performing construction so as to sufficiently withstand the lateral pressure of concrete, etc., concrete is placed in the form 34, then cured, dried, and then demolded to finish. It was in.

[0005]

However, the conventional formwork has the following problems. First, in the case of connecting the pier to the concrete panel, there is a problem that the work of fixing the pier to the concrete panel with a nail or the like requires skill, and the work amount is large, resulting in poor workability. Next, when assembling the formwork at a predetermined place, it is necessary to punch holes at the positions where the tightening metal fittings such as the separator are located. In addition, it is necessary to have sufficient strength so that the formwork will not collapse due to the lateral pressure of concrete when pouring concrete. In addition, there is a problem in that it depends on the arrangement of thick materials in the vertical and horizontal edges, requires a high degree of skill based on experience and skill, has poor workability, and requires man-hours.

In addition, in the case of finishing, the mold is removed after the hardening of the concrete is completed, and after the surface is dried, the finishing process is started, but it takes several days to harden and dry the concrete.
It was the biggest obstacle to rationalization in construction work. Further, finishing work requires a high degree of skill for smoothing the surface, and its goodness or badness greatly affects the aesthetics and durability of the building. Furthermore, if the finishing process is inadequate, it may cause an accident such as peeling of tiles.

Therefore, Japanese Patent Laid-Open No. 62-236959 has been proposed as a solution to these conventional problems.
Japanese Unexamined Patent Publication No. 62-236959 discloses a side wall plate for a permanent formwork, which is provided with a cement biting means such as a honeycomb structure on the back surface of a fiber reinforced cement plate. This is because there is no need to dismantle the formwork plate, the workability is remarkably improved, and the anchor effect of the permanent formwork to the concrete wall is high, so that there is no fear of stripping of the side plate.

However, in the above-mentioned conventional construction, when a claw plate for a permanent formwork is installed on site, nailing cannot be done because nailing with this claw plate will break or scratch the decorative part. In order to hold and fix, the vertical and horizontal end thick materials are arranged more densely than in the past, and it is difficult to dispose the tightening metal fittings such as the separator, so that there is a problem that complicated work is required for the bar arrangement and the like. Also, since the front surface forms a design surface, when arranging the vertical end thick material, a cushioning material for protecting the design surface must be provided, and the work is complicated and requires a lot of man-hours. There are problems, and the cushioning material must be treated after the mold is dismantled, which requires various problems.

The present invention solves the above-mentioned problems of the prior art, is lightweight, has excellent mechanical strength, and saves the work of formwork.
The workability is improved and the construction period can be greatly shortened.Furthermore, by holding the periphery of the baffle plate and supporting the front side as a whole, the thickness of the baffle plate is made thin and the weight is significantly reduced during transportation and construction. It is an object of the present invention to provide an excellent permanent formwork frame capable of improving the workability of

[0010]

In order to achieve this object, a frame for permanent formwork according to claim 1 of the present invention is formed around a flat plate portion supporting a cement plate or the like, and around the flat plate portion. 3. A permanent plate according to claim 2, which has a structure including a claw plate holding portion formed by a raised protrusion or a ridge and a flat plate reinforcing portion formed by a rib formed on the back surface of the flat plate portion as necessary. The frame for formwork has a configuration including a flat plate portion having a reinforcing core material such as a honeycomb core material, and a clad plate holding portion formed of protrusions and ridges formed around the flat plate portion, Three
The permanent mold frame according to claim 1 or 2 has a structure in which a spill-out prevention part made of a hard rubber material or the like is formed on the upper surface of the baffle plate holding part of the frame according to claim 1, The frame has a structure in which a frame positioning hole formed so as to be substantially orthogonal to the holding portion is provided on the back side of the skid board holding portion.

The flat plate portion need only have high rigidity, and may be made of wood such as plywood or metal such as iron or aluminum, FRP, PC or ABS reinforced with glass fiber or carbon fiber. , Polyamide, polyester, FRTP such as PPO, or a flat plate made of a single plate of these synthetic resins, a laminated plate obtained by laminating a honeycomb core material or a core material formed in a lattice shape on these flat plates, and further on the surface of the core material separately. A sandwich plate in which the flat plates are laminated is preferably used. The safety board holding part is a ridge-shaped or projecting part made of the same material as the flat plate part entirely or partially, or of a different high impact material made of a composite material such as a metal such as aluminum or other synthetic resin. It may be provided upright on the plate, or may be formed by projecting a plate-like object on the side wall of the flat plate. A recess for arranging the separator is formed in a predetermined portion of the side wall of the baffle plate or the side wall of the flat plate. When the baffle holding portions are partially disposed on the peripheral side portion or the side wall portion of the flat plate portion, the baffle holding portions may be used as separator attachment portions. The height of the baffle holding portion may be high enough to form a joint when the baffle is supported by the flat plate portion. By forming an elastic part to prevent slag on the upper surface of the skid board holding part (the side where the skid board is mounted) or by separately fixing a hard rubber packing etc., the front design part can be protected securely and the mold can be easily removed from the mold. Can be

The flat plate reinforcing portion is provided when the thickness of the flat plate portion is thin. The flat plate reinforcing portion is provided with a plurality of vertical and / or horizontal ribs or lattice-like ribs on the back surface of the flat plate portion, or when the skid board holding portion is provided. In the case of a plate-shaped object arranged on the side wall of the flat plate part, reinforcing members are arranged vertically and horizontally between the back surfaces of the plate-shaped object to form a cage,
A flat plate portion may be housed and fixed in the basket. As for the shape of the frame for permanent formwork, those used for beams, wall surfaces, floor slabs, slopes, etc. should be square or rectangular, and those used for the corners of a building should have a cross section other than these. May have a substantially semi-circular shape or a substantially L shape. The holes and recesses in the frame positioning part are bolts and thick wire (wire).
It is sufficient if the diameter is enough to insert and remove. In addition, as a clad board, a cement board or a wood wool cement board reinforced with fibers such as glass fiber and carbon fiber, a wood chip cement board, a flexible board, a calcium silicate board, a gypsum board, a seeding gypsum board, a gypsum sound absorbing board, a gypsum lath board, a makeup board. Gypsum board or the like is used.

[0013]

With this construction, the periphery and corners of the baffle plate are held and protected by the baffle plate holding portion, and the entire surface of the baffle plate is supported by the entire flat plate portion, so that it is not affected by impact during transportation or formwork. Since it is possible to prevent damage to the baffle plate and to reduce the rigidity of the baffle plate, it is possible to reduce the thickness and weight of the baffle plate accordingly. Further, since the claw plate can be made thin, it is possible to effectively form a bite into concrete on the back surface thereof. In addition, the buffer material used for protecting the surface of the claw plate when assembling the conventional mold is not required, so that the man-hour can be reduced and the workability of the mold work can be improved. When the frame for permanent formwork is made of synthetic resin, etc., it is lighter in weight and has better mechanical strength than conventional formwork boards, and its durability can be improved several tens of times. Possible to mass produce high quality products at low cost. In addition, it is not necessary to have skill because the permanent formwork frame can be installed and supported on the site, or the one with the support installed and supported at the factory can be brought into the site and assembled, and the workability of the construction can be significantly reduced. The construction period can be shortened. Since the permanent formwork frame does not come into direct contact with the concrete, no post-treatment is required and the work load can be reduced. Since the attachment position of the separator or the like is determined on the predetermined outer peripheral portion of the permanent mold frame, the installation work can be simplified. A spillage prevention part on the top of the siding board holding part of the framework prevents spillage during pouring of concrete, prevents dirt on the design surface of the siding board, and easily removes the frame when dismantling the formwork. be able to. The frame positioning part keeps the permanent formwork frames arranged vertically and horizontally at the time of assembling the formwork according to the design drawing, and prevents unevenness from being formed on the concrete wall, and facilitates the work of installing thick timber. can do.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a front perspective view of a permanent mold frame according to the present invention, FIG. 2 is a rear perspective view of the frame, and FIG. It is a front side perspective view showing the state where it was made. 1 is a flat plate part made of FRP with a smooth surface to uniformly support the front part of the baffle plate, and 2 is protruded by a height for holding the side part of the front face of the baffle plate and fixed to the side wall of the flat plate part by adhesion. A baffle holding portion made of a plate-shaped object, 21 a frame positioning portion made of a hole formed in a lower portion of the baffle holding portion in a substantially orthogonal shape, and 3 a concave portion formed for disposing a separator or the like. 4a, 4b
Is a flat plate reinforcing portion having a lattice-like rib structure integrally formed on the back surface of the flat plate portion 1 at the same height as the rear surface side of the baffle plate holding portion 5, 5 is a frame for permanent formwork, and 6 is a front surface. A side wall having a design portion formed on the side, and a protruding ridge 7 formed on the back surface of the side wall 6 embedded in concrete. The projection height H of the front surface side of the flat plate portion 1 of the baffle holding portion 2 is set to the depth of the joint portion and the width W is set to be approximately 1/2 of the joint portion width. A hard rubber plate, a hard foam plate, or the like is provided on the upper surface of the baffle plate holding portion 2 as a spill-out preventing portion. It is preferable for durability that the flat plate portion 1 and the side wall holding portion 2 are subjected to alkali resistance treatment, for example, coated with a strong alkali resistance resin such as fluororesin or laminated to prevent corrosion even if a strong alkali slag leaks. Since the skid plate 6 is integrated with the flat plate portion 1 and resists the lateral pressure at the time of placing concrete, the second moment of area of the skid plate 6 can be reduced and the thickness of the wall thickness is reduced to 45% of the conventional thickness. Since the ridge 7 is formed on the back surface, the weight of the baffle plate can be reduced to about half of the conventional one, and the anchor effect can be remarkably enhanced.

The operation of the permanent formwork frame of the present embodiment constructed as described above will be described below with reference to FIG. FIG. 4 is a plan view of an essential part showing a state at the time of placing concrete after the formwork is assembled. Reference numeral 2 is a baffle holding portion, 22 is a bolt inserted in the baffle holding portion, 6 is a baffle plate, 8 is a spill-out preventing material made of hard rubber packing arranged around the baffle plate, and 9 is a round steel pipe. The vertical edge thick material, 10 is the horizontal edge thick material, 11 is a separator, 12 is a foam tie screwed to the separator, and 13 is fresh concrete. The permanent molding frame is housed so that the front side of the baffle plate 6 having a hard rubber packing 8 on the outer periphery abuts against the flat plate portion 1 inside the frame formed by the baffle plate holding portion 2, and then the back face and the flat plate portion. It is sandwiched by a claw plate fixture having a sandwiching means for sandwiching between the back faces of the 1 and the concrete placing section is sandwiched and arranged at a predetermined position of the formwork installation section at the construction site. Then
The separators 11 are arranged in the respective recesses 3 and the separators 1
1, the vertical end thick material 9 and the lateral end thick material 10 are installed, the frame for the permanent formwork is fixed by the foam tie 12, and the claw plate fixing tool is removed. Then, after temporarily fixing the frame positioning portion 21 with the bolts 22, the fresh concrete 13 is placed. After curing the concrete, the horizontal edge thick material 10 and the vertical edge thick material 9 were removed and the frame for the permanent formwork was removed from the mold, whereby the concrete wall having the design surface on the surface could be constructed.

(Example 2) A permanent formwork was carried out in the same manner as in Example 1 except that a lattice-shaped honeycomb was used as a core material and a laminated plate laminated by a flat plate portion 1 made of a FRTP plate of high molecular weight polyolefin was sandwiched. The frame was manufactured and the concrete wall was constructed. (Comparative Example 1) As a conventional example, a slab having a thickness of 10 mm was prepared in the same manner as in JP-A-62-236959, and a concrete wall was constructed without using a permanent formwork frame.

In Examples 1 and 2, it is possible to construct a concrete wall similar to that of the comparative example by installing a thick material in which the thickness of the baffle plate 6 is approximately half or less as compared with the comparative example and approximately half or less. As a result, the weight of the planks was reduced, the workability during transportation and formwork assembly was greatly improved, and the concrete wall could be constructed in about half the construction period. This is a comparative example
This is because it is necessary to increase the wall thickness because it is necessary to counter the lateral pressure of the fresh concrete only with the clapboard, and it is necessary to assemble the thick pieces densely to prevent cracking and warpage of the clapboard. This is because it hinders transportation and formwork assembly at high places and significantly reduces workability. In addition, in the comparative example, in order to protect the surface of the baffle plate, a cushioning material such as a hard rubber plate must be interposed in the contact portion with the vertical end thick material, which requires time, and the thickness of the baffle plate is Since there is only 10 mm, corners and the like are dropped due to dropping and impact when stacking, which requires a large amount of work and requires a long construction period. On the other hand, in Examples 1 and 2, the vertical end thick material can be arranged directly on the back surface of the frame for the permanent formwork without using the cushioning material, and the width of the plate-like material forming the skid board holding portion 2 is 15 mm. The workability was extremely high because it was easy to stack because of its wide width. Further, the surface of the concrete wall of the comparative example was chipped or warped, and it took time to post-process such as dirt and washing due to the outflow of slag. Since it is protected by a slag prevention unit, there is almost no chipping or warping, and no spillage occurs, and no post-treatment is required.

[0018]

As described above, the present invention is a frame for a permanent formwork having a flat plate portion and a blanking plate holding portion around the flat plate portion. Therefore, since the front face of the blanket plate is protected and supported on the entire surface,
Even if the wall thickness is thin, it can withstand the lateral pressure of fresh concrete, so the weight of the concrete board can be significantly reduced, and even if the concrete board is attached to the frame for permanent formwork, it can be significantly reduced compared to the past. As a result, the workability of formwork construction can be significantly improved and the construction period can be shortened significantly. Further, since the front surface of the baffle plate is protected, the front design surface is prevented from being contaminated with slag, and no post-treatment is required, so that workability can be remarkably improved. Furthermore, since the frame for the permanent formwork has an appropriate thickness even when the formwork is assembled, it is possible to prevent accidents such as dropping accidents and chipping of corners during stacking work. Further, since the frame positioning portion is provided, the permanent form frame can be held accurately along with the marking. Further, since the permanent formwork frame is manufactured in a factory from a synthetic resin or the like, it is possible to realize an excellent permanent formwork frame which is easy to control in quality, high in quality, low in cost, and suitable for mass production.

[Brief description of drawings]

FIG. 1 is a front perspective view of a permanent formwork frame according to a first embodiment of the present invention.

FIG. 2 is a rear side perspective view of the frame for permanent formwork according to the first embodiment of the present invention.

FIG. 3 is a front side perspective view showing a state where a baffle plate is mounted and supported.

FIG. 4 is a plan view of an essential part showing a state at the time of placing concrete after assembling the formwork.

[Fig. 5] A formwork formed by placing a splint on a conventional concrete panel

FIG. 6 is a perspective view of a main part during construction using a conventional formwork.

[Explanation of symbols] 1 flat plate portion 2 claw plate holding portion 21 frame positioning portion 22 frame positioning bolt 3 recesses 4a, 4b flat plate reinforcing portion 5 permanent form frame 6 claw plate 7 claws on the back of the claw plate 8 spillage prevention Material 9,36 Vertical edge thick material 10,35 Horizontal edge thick material 11,38 Separator 12,37 Foam tie 13 Fresh concrete 31 Concrete panel 32 Horizontal stile 33 Vertical stile 34 Formwork 39 Bar arrangement

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunimoto Kume 1-21-40, Moto-gun, Kagoshima City, Kagoshima Prefecture Kagoshima University (72) Kuji Tokutomi 21-21-40, Motogen, Kagoshima City, Kagoshima Prefecture Kagoshima University

Claims (4)

[Claims] 1. A flat plate portion for supporting a clad plate such as a cement plate, a claw plate holding part formed of protrusions and ridges formed around the flat plate part, and, if necessary, on the back surface of the flat plate part. A frame for permanent formwork, comprising: a flat plate reinforcing portion including a formed rib or the like. 2. A permanent formwork, comprising: a flat plate portion having a reinforcing core material such as a honeycomb core material; and a flat plate holding portion formed of a protrusion or a ridge formed around the flat plate portion. For frame. 3. The frame for permanent formwork according to claim 1, wherein a spill-out preventing portion made of a hard rubber material or the like is formed on the upper surface of the baffle holding portion. 4. A frame positioning portion formed of a hole or a recess formed so as to be substantially orthogonal to the baffle holding portion is provided on the back side of the baffle holding portion.
The frame for permanent formwork according to any one of 1 to 3.