JP3752677B2 - Formwork panel and auxiliary metal fittings - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal formwork panel used for a dam plate of a concrete formwork in civil engineering construction work.
[0002]
[Prior art]
From the viewpoint of forest protection, metal formwork panels are being used instead of plywood formwork panels. Since this metal formwork panel is placed on the surface of the hardened concrete frame after placing the concrete, it is not necessary to dismantle and remove the formwork panel and prevent deterioration of the quality of the concrete. It has the following advantages.
[0003]
[Problems to be solved by the invention]
On the other hand, the fact that the surface of the concrete frame is covered with a metal formwork panel makes it difficult to apply cosmetic and waterproof mortar and to attach interior and exterior materials. For this reason, the conventional formwork panel was used exclusively for the formwork of the foundation part of the structure. It is an object of the present invention to provide a metal form panel that can be used suitably for formwork other than the base portion of the structure by solving the disadvantages of the conventional metal formwork panel. In addition, another object is to provide an auxiliary metal fitting that facilitates assembly of a mold using the mold panel.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is configured as follows. That is, a formwork panel according to the present invention is a formwork panel in which a metal plate is bent along a plurality of fold lines parallel to each other, and a cross section intersecting with the fold lines is formed into a concavo-convex shape. A throttle portion that is located on the concrete placement space side, and has two portions facing each other at a position close to each other, and is formed on the opposite side of the concrete placement space continuously to the throttle portion, It is characterized by having a bag shape composed of a bag-shaped portion having a maximum maximum distance in the same direction as the interval between the two portions in FIG.
[0005]
The formwork panel is erected so that the drawing portion side, which is the opening of the bag-like portion, faces the concrete placing side, and the folding line is in the vertical direction. The gap formed between the narrowed portions is narrow, and the concrete placement space and the internal space of the bag-like portion are merely connected via the gap. Concrete does not enter into the bag-shaped portion composed of the bag-shaped portion. After placing concrete, attach interior and exterior materials to the outer surface of the formwork panel (opposite to the concrete placement side) with a fastener such as a screw. Insert the fixture into the bag. Since there is no concrete in the bag-like location, the fixture can be easily inserted. At this time, if the distal end portion of the fixture is sandwiched between the throttle portions, the fixture is fixed at two locations, the base portion and the distal end portion, so that the mounting strength is improved.
[0006]
Moreover, it is preferable to provide the said formwork panel other than the said bag-shaped part in the surplus water discharge hole for discharging surplus water at the time of concrete placement. As the excess water discharge hole, the inner part and the outer part of the contour are connected via a part of the contour left without being cut, and the inner portion of the contour is placed in the concrete when no external pressure is applied. It is preferable that the inner portion of the contour bends when the concrete placement side is pressed and is located on the same plane as the outer portion of the contour. According to this configuration, since there is a gap between the inner side and the outer side of the contour in a normal state, excess water is discharged well, and when the concrete placement side is pressurized by applying a vibrator, the hole is closed and the concrete is closed. Acts to prevent leakage.
[0007]
Next, the first auxiliary metal fitting according to the present invention is combined with a formwork panel formed by bending a metal plate along a plurality of fold lines parallel to each other and forming a cross section intersecting with the fold lines to be uneven. An auxiliary metal fitting to be used, which has a U-shaped cross section composed of a straight bottom surface portion with a predetermined width and a pair of upright portions rising upward from both widthwise ends of the bottom surface portion, and at least one of the standing portions A pair of cuts are formed such that the distance from the upper end toward the lower side becomes narrower toward the lower side.
[0008]
The first auxiliary metal fitting is fixed to the upper surface of the discarded concrete with a fixing tool, for example, a concrete nail, in order to hold the lower end portion of the formwork panel built in the straight part of the formwork. When fixing, the small piece portion sandwiched between the pair of cuts is bent outward, and the concrete nail inserted through the small piece portion is discarded and driven into the concrete. A small piece bent outwardly serves as a support, and the auxiliary bracket can maintain the posture during use alone.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The formwork panel 1 shown in FIGS. 1 to 3 is formed by bending a metal plate (thickness 0.2 to 1.0 mm) into a predetermined shape along a vertical fold line and plating it with zinc or the like. The rib portion 2, the corrugated portion 3, and the flat plate portion 4 are arranged in parallel in the horizontal direction.
[0012]
As shown in FIG. 2, the rib portion 2 is composed of a narrowed portion 2a following the flat plate portions 4 and 4, and a bag-like portion 2b having an isosceles triangle section formed at the tip thereof, and an internal space of the bag-like portion 2b. And the external space are connected via a gap between the throttle portions 2a. The diaphragm portion 2a faces two portions bent at right angles to the flat plate portion 4 at positions close to each other so that almost no gap is generated between them. By forming such a cross-sectional bag shape, the rib portion as a whole has a columnar shape, which is strong against compression and bending. Further, by providing the throttle portion 2a, the concrete does not flow into the bag-like portion 2b when the concrete is placed.
[0013]
The corrugated portion 3 is formed in a cross-sectional waveform by alternately arranging convex portions 3a and concave portions 3b on the surface side (the side where the bag-like portion 2b of the rib portion 2 is present). A plurality of longitudinal slits 5 are formed at equal intervals in the concave portion 3b, and the concave portion 3b can be easily bent by hand. The bending angle of the convex portion 3a can also be changed. For this reason, the corrugated part 3 is bent into a desired shape by appropriately changing the angles of the respective parts 3a and 3b. Further, the angle of each of the portions 3a and 3b can be increased to expand the horizontal width of the waveform portion 3, and the angle of each of the portions 3a and 3b can be decreased to reduce the horizontal width of the waveform portion 3. In addition, the slit 5 also has a role which discharges surplus water at the time of concrete placement.
[0014]
In the flat plate portion 4, a plurality of excess water discharge holes 6 are formed at equal intervals on the same straight line in the vertical direction. As shown in FIG. 3, the surplus water discharge hole 6 is left without being cut at the upper part of the circular outline, and the inner part 6b of the outline is connected to the outer part via the non-cut part 6a. It has a form. Therefore, the surplus water discharge hole 6 is not a completely open hole but is in a partially closed state in the initial state, and when the separator is inserted, the non-cut portion 6a of the contour is cut or bent as necessary. By removing the inner portion 6b, the hole is completely opened. The shape of the excess water discharge hole 6 is not limited to a circle, and may be selected as appropriate in consideration of ease of processing such as an ellipse or a rectangle.
[0015]
Further, the non-cut portion 6a is bent in a crank shape on the back surface side, and the inner portion 6b of the contour is positioned slightly on the back surface side with respect to the panel surface in the initial state. Since the crank-shaped non-cutting portion 6a has a flexible structure, when pressure is applied to the back side, the non-cutting portion 6a rotates to the front side as shown by a chain line in FIG. It has become.
[0016]
Next, a procedure for assembling the mold shown in FIG. 4 using the mold panel 1 will be described.
[0017]
First, a liner 11, which is an auxiliary metal fitting for the straight portion, is laid on the discarded concrete 10 in accordance with the planar shape of the mold and fixed with concrete nails. As shown in FIG. 5 (a), the liner 11 has a cross-section that includes a straight bottom surface portion 11a having a predetermined width and a pair of upright portions 11b and 11c that rise upward from both ends of the bottom surface portion. It is a long metal material with a U-shape. The upper end portions of the upright portions 11b and 11c are folded outward for reinforcement and safety during handling. A pair of cuts 11d are formed in the lower upright portion 11c at appropriate intervals so that the distance from the upper end to the lower side becomes narrower toward the lower side. A small hole 11f is formed in two upper and lower stages in a small piece portion 11e sandwiched between a pair of cuts 11d.
[0018]
At the time of use, as shown in FIG. 5 (b), the small piece portion 11e is bent outward, the concrete nail 12 inserted into the small hole 11f on either the upper or lower sides is thrown into the concrete 10, and the liner 11 is fixed. By bending the small piece portion 11e outward, the small piece portion 11e is supported and the liner 11 can maintain the posture in use alone, so that assistance by hand becomes unnecessary and the operation can be performed smoothly. Since the distance between the pair of cuts 11d is narrower toward the lower side, the small piece portion 11e can be easily bent at the base portion. Further, because of the above shape, as shown in FIG. 5C, the head H of the nail driver is inserted between the upright portions 11b and 11c, and the small piece portion 11e is bent using the head. Work efficiently.
[0019]
A corner fitting 13 shown in FIG. 6 is used at the corner of the mold as an auxiliary fitting for the corner. The corner metal 13 is a metal material having a U-shaped cross section including a bottom surface portion 13a having a predetermined width and a middle portion bent at a right angle, and a pair of upright portions 13b and 13c rising upward from both ends of the bottom surface portion. A long hole 13d for concrete nails is formed in the bottom surface portion 13a, and small holes 13e for screws are formed in the standing portions 13b and 13c. The concrete nail inserted through the long hole 13d is discarded and driven into the concrete, and the corner fitting 13 is fixed. Since the concrete nail is inserted through the long hole 13d, the insertion position of the concrete nail is flexible and the operation is easy.
[0020]
And the formwork panel 1 is built on the fixed liner 11 and the corner metal fitting 13 so that the surface side may face outward. The lower end or the upper end of the formwork panel 1 is fixed to the liner 11 and the corner fitting 13 with screws. Thereby, the lower end of the formwork panel 1 is held horizontally. Moreover, by using the corner metal fitting 13, the angle of the corner portion can be accurately obtained, and the accuracy of the formwork can be improved.
[0021]
When the formwork panels are built in this way, the formwork panels 1 and 1 facing each other are connected using the separator 14. As shown in FIG. 7, the connecting method is such that the separator 14 is inserted into the opened excess water discharge hole 6, and the foam tie 15 is screwed onto the male screw portion 14 a protruding to the outside of the form panel 1. Then, for example, a steel pipe 16 is placed on the foam tie 15 as a lateral reinforcing material, and a fastener 17 is attached to the outside of the steel pipe, and then a wedge 18 is inserted into the groove 15a of the foam tie 15 to attach the steel pipe 16 Fix it. The connection by the separator is not necessarily performed for all the excess water discharge holes 6, and may be performed by selecting an appropriate excess water discharge hole 6. Therefore, the surplus water discharge hole 6 that is not connected by the separator is kept in a semi-closed state. When inserting the separator 14 into the surplus water discharge hole 6 in a semi-closed state, the non-cut portion of the contour can be easily cut by simply pressing the tip of the separator 14 against the inner portion 6b of the surplus water discharge hole 6. Or it bends and opens.
[0022]
Finally, the liner 11 and the corner metal fitting 13 which are turned upside down are put on the upper end part of the formwork panel 1 for safety at the time of placing concrete.
[0023]
Since the form frame assembled in this way has the rib portions 2 in the vertical direction of the form panel 1 and the horizontal steel pipes 15 attached to the outside of the form panel 1 assembled in a lattice shape, Despite the fact that the panel 1 is an ultra-thin plate, it has a robust structure that is strong against both vertical and horizontal bending.
[0024]
When the formwork is completed, ready concrete is placed in the formwork. The excess water of the concrete is discharged from the slit 5 and the excess water discharge hole 6 in the semi-closed state, and the concrete is hardened in an ideal state. When vibration is applied with a vibrator during concrete placement, the back surface side (concrete placement side) of the formwork panel 1 is pressurized, and as shown by a chain line in FIG. The inner portion 6b rotates to the front surface side and is positioned on the same plane as the panel body. As a result, the surplus water discharge hole 6 is almost completely closed, and the concrete is prevented from leaking.
[0025]
Since the rib part 2 and the corrugated part 3 are uneven | corrugated shape, the mesh panel 1 has favorable mesh | engagement with concrete, and a solid concrete structure with high adhesiveness between a mold and concrete is obtained. After the concrete is hardened, the wedge 18, the fastener 17, the steel pipe 16, and the foam tie 15 are removed in this order. The formwork panel 1 and the separator 14 are left without being disassembled.
[0026]
Then, an interior material and an exterior material are attached to the outside of the concrete structure as necessary. As shown in FIG. 8, (a) an interior material (or exterior material) 20 is applied to the formwork panel 1, and (b) a countersunk screw 21 is attached to the interior material 20 in accordance with the position of the rib portion 2. Screw in. Since the concrete does not enter the bag-like portion 2b of the rib portion 2, the countersunk screw 21 can be screwed in without difficulty. (C) When the countersunk screw 21 is further screwed in, the tip end portion is inserted into the throttle portion 2a and sandwiched. Thereby, the countersunk | screw 21 is fixed to the formwork panel 1 in the two places, the base part and the front-end | tip part, and fixing strength improves. The tip of the countersunk screw 21 is not easily corroded because it comes into contact with alkaline concrete.
[0027]
In the state where the interior material 20 is attached, an air layer is formed between the concrete structure 22 and the interior material 20, so that the heat insulation effect is high. In addition, since the condensation of the concrete is prevented, the generation of mold and the deterioration and breakage of the interior material can be prevented. When the bag-like portion 2b has an isosceles triangle cross section as in the present embodiment, the interior material 20 comes into surface contact with the formwork panel 1 and the attachment is stabilized, and the tip of the flat screw 21 is screwed in when the countersunk screw 21 is screwed in. Has the advantage of being easily guided to the aperture portion 2a.
[0031]
【The invention's effect】
As described above, the formwork panel according to the present invention is a diaphragm in which a part of a panel having an uneven cross section is positioned on the concrete placement space side and the two parts face each other at positions close to each other. Formed in a bag shape comprising a portion and a bag-like portion formed on the opposite side of the concrete placement space in succession to the drawn portion and having a maximum interval in the same direction as the gap between the two portions in the drawn portion. Therefore, the squeezed part and the bag-like part become a space where the concrete does not enter when the concrete is placed, and a fixing tool such as a screw, a nail, or a screw is inserted into this space to dispose the interior material or the exterior material. It can be easily attached, and at that time, by fixing the distal end portion of the fixture to the throttle portion, the fixture is fixed at two locations of the base portion and the distal end portion. With strength is improved. For this reason, it became very suitable also for formwork other than the foundation part of the structure where an interior material and an exterior material are attached after concrete hardening.
[0032]
By using the auxiliary metal fittings for the straight part, it is possible to discard the lower end part of the form panel and accurately hold it at a predetermined position on the concrete when constructing the straight part of the form, which improves the precision of the form. effective. The auxiliary metal fitting for the straight portion can maintain the posture at the time of use independently by bending the small piece portion sandwiched between the pair of cuts outward, so that the auxiliary metal fitting can be fixed efficiently. The small piece is easily bent.
[0033]
In addition, the use of the auxiliary metal fittings for the corner portion allows the lower end portion of the formwork panel to be discarded and accurately held on the concrete when constructing the corner portion of the formwork, thereby improving the accuracy of the formwork. There is. Since the hole for inserting the fixing tool for fixing the auxiliary metal fitting is a long hole, the auxiliary metal fitting for the corner portion has flexibility in the insertion position of the fixing tool, and the fixing work is easy.
[Brief description of the drawings]
FIG. 1 is a perspective view of a formwork panel.
FIG. 2 is a plan sectional view of a rib portion.
3A is a front view of a surplus water discharge hole, and FIG. 3B is a side cross-sectional view thereof.
FIG. 4 is a perspective view of a formwork.
5A is a perspective view of a liner, FIG. 5B is a perspective view in a different state, and FIG.
FIG. 6 is a perspective view of a corner fitting.
FIG. 7 is a cross-sectional view of the main part of the mold.
FIGS. 8A, 8B, and 8C are cross-sectional views showing respective steps of attaching the interior material.

Claims (3)

In a formwork panel formed by bending a metal plate along a plurality of fold lines parallel to each other and forming a cross section that intersects the fold line to be uneven, a part of the unevenness is located on the concrete placement space side. A throttle part formed by two parts facing each other at a position close to each other, and formed on the opposite side of the concrete placing space continuously to the throttle part, and is equal to the distance between the two parts in the throttle part. A formwork panel characterized in that it is formed into a bag shape having a bag-like portion with a wide maximum interval in the direction .   The inner part and outer part of the contour are connected via a part of the contour that is left uncut, and the inner portion of the contour projects slightly to the concrete placement side when no external pressure is applied. The mold according to claim 1, wherein an excess water discharge hole configured to be located on the same plane as the outer side portion of the contour when the installation side is pressed is provided at a location other than the bag-like portion. Frame panel.   An auxiliary metal fitting that is used in combination with a formwork panel that is formed by bending a metal plate along a plurality of fold lines parallel to each other and forming a cross section that intersects the fold line to be uneven. And has a U-shaped cross section consisting of a pair of upstanding portions that rise upward from both ends in the width direction of the bottom surface portion, and at least one of the standing portions is spaced apart from the upper end toward the lower side. A pair of incisions that are narrowed to form an auxiliary metal fitting.

Images