JP5438394B2 - Metal formwork panels - Google Patents

Description

  The present invention relates to a metal formwork panel used for a dam plate of a concrete formwork in civil engineering construction work.

  In recent years, from the viewpoint of global environmental protection, instead of a plywood formwork panel using wood, metal formwork panels have become widespread. For example, a technique described in Patent Document 1 is provided. The “discarded formwork panel” described in Document 1 is a metal plate so that metal fittings such as separators and fasteners used in conventional wood plywood formwork can be used in metal formwork. A plurality of ribs are formed, the rib width is set narrower than the outer diameter of the flange of the fastener, and the depth of the rib is set to be equal to the thickness of the wood plywood formwork panel. Thereby, since a flange is hooked on a rib surface, the metal fitting for conventional plywood molds can be used as it is for a metal mold panel.

Japanese Patent No. 3560767

  However, since the prior art using this type of metal formwork panel is focused on diverting the conventional assembly method and metal fittings for the wood plywood formwork panel 1 ′, The separator 2 detent projection 203 (see FIG. 10) that contacts the inner peripheral surface of the insertion hole for the separator 2 provided in the plywood form panel 1 ′ and prevents the separator 2 from spinning idle (see FIG. 10) is made of metal. If it is intended to be used for assembling the formwork as it is, the rib width is narrower than the outer diameter of the flange 301 of the fastener 3, so that the rotation-preventing protruding piece 203 of the separator 2 for the wood plywood formwork panel 1 ′ In this case, it becomes idle in the recess of the rib provided on the metal formwork panel 1 ″ (see FIG. 11), and the effect of the non-rotating projection piece 203 that prevents the separator 2 from spinning idle can be exhibited. Na Therefore, a total of two workers are required: a worker who screws the fastener 3 into the male thread portion 201 at one end of the separator 2 and a worker who holds the other end of the separator 2 to prevent idle rotation. Met.

  Further, since the separator's round washer 202 is larger than the outer diameter of the insertion hole for the separator 2, the separator 2 cannot be inserted from the outside of the metal formwork panel 1 ", and the separator 2 is inserted and fixed. Was very troublesome.

  Then, this invention makes it a subject to provide the metal formwork panel for concrete formwork which one person can install easily.

  In order to solve the above-described problems, the present invention is configured as follows. That is, in the metal formwork panel according to claim 1 of the present invention, the ribs are formed at predetermined intervals by bending the metal plate, and the C-shaped slits are provided at the predetermined intervals on the bottom surface of the ribs. In the metal formwork panel used as the dam plate of the formwork constituting the vertical surface of the concrete for civil engineering and construction, the width dimension of the C-shaped slit is set so as to contact the inner surface of the panel when the separator is tightened. The width of the separator is a width that allows the separator to be inserted, and the rib has a groove shape that can be fitted with a spacer that fills the gap of the rib when the separator is fixed.

  According to the metal formwork panel according to the present invention, the protrusion of the separator contacts the inner side of the repetitive spacer to prevent idle rotation, so that an operator for gripping on the facing side becomes unnecessary, Since the separator can be inserted from the outside of one of the pair of metal formwork panels, it can be assembled by one person. Thereby, the number of workers can be halved compared with the conventional metal formwork panel, and the construction period can be dramatically shortened and the construction cost can be reduced.

It is a perspective view which shows the concrete formwork using the metal formwork panel which concerns on this invention. It is sectional drawing and front view which show this metal mold panel. It is a perspective view which shows a mode that a separator is fixed to this metal mold panel. It is a sectional view in plan view showing a state in which a separator is fixed to the metal mold panel. It is a perspective view which shows a mode that a separator is fixed to this metal formwork panel using a hexagon washer. It is a perspective view which shows a hexagon washer. It is a perspective view which shows the separator at the time of assembling a concrete formwork using a hexagonal washer. It is a cross-sectional view in plan view showing a state in which a separator is fixed to the metal mold panel using a hexagonal washer. It is a figure which shows the state which installed the concrete formwork. It is a planar view sectional view which shows the state which fixed the separator to the conventional wooden formwork panel. It is a top view sectional view showing the state where the separator was fixed to the conventional metal formwork panel.

  Hereinafter, the form of this invention is demonstrated in detail based on the Example shown below.

  First, the assembly of a concrete formwork using the metal formwork panel 1 according to the present invention will be briefly described with reference to FIG. 1 which is a perspective view thereof. Runner β is installed in line with the ink line drawn on the discarded concrete α or floor slab concrete, and fixed with concrete nails. Then, a pair of metal formwork panels 1 are installed facing each other on the runner, and the separator 2 is fixed to the metal formwork panel 1 using the fasteners 3 and the spacers 4. A steel pipe γ for reinforcement is attached to the outer surface of the frame panel 1 to assemble a concrete formwork. Hereinafter, Example 1 of the metal formwork panel 1 will be described in detail with reference to FIGS. 2 to 4.

  Fig.2 (a) is sectional drawing which shows the metal formwork panel 1 of this invention, FIG.2 (b) is the front view. The metal mold panel 1 is formed by processing a high corrosion-resistant hot-dip galvanized steel sheet, and a plurality of vertical ribs 101 having a U-shaped cross section are provided at regular intervals. In addition, a plurality of circular C-shaped slits 102 having a diameter substantially the same as the width direction of the concave bottom surface of the rib 101 are formed at regular intervals on the concave bottom surface of each rib 101. When a portion surrounded by the circular C-shaped slit 102 is pressed, a hole for inserting the separator 2 can be opened. What is necessary is just to close the part which does not insert the separator 2 as it is.

  FIG. 3 is an enlarged perspective view of the C-shaped slit 102 portion formed in the rib 101, and shows a state in which the separator 2 and the fastener 3 are fixed to the metal mold panel 1. In FIG. 3, the back side of the metal mold panel 1, that is, the separator 2 side is the inside filled with concrete, and the near side of the metal mold panel 1, that is, the fastener 3 side is the outside. The separator 2 is a metal rod-like body, and is formed with a male screw portion 201, a round washer 202, and a protruding piece 203 for screwing with the fastener 3 at both ends (only one end is shown in the figure). .) The fastener 3 is a metal rod-like body, and is screwed into the male thread portion 201 of the separator 2 inside a flange 301 formed so as to be in contact with the outer surface of the metal mold panel 1. A female screw portion (not shown) is provided.

  In addition, the flared spacer 4 is formed with a bottom portion at the lower end of the synthetic resin block, and the surface in contact with the metal mold panel 1 is formed to have the same width dimension as the bottom portion of the rib 101 or slightly wider. Yes. By configuring the spacer 4 in such a width dimension, the horizontal spacer 4 can be prevented from being displaced in the horizontal direction when contacting the bottom surface of the rib 101. If the spacer 4 is formed in the same shape as the groove shape of the rib 101, it can be fitted to the rib 101 along the shape, so that the spacer 4 can be fixed more firmly.

  In order to fix the separator 2 and the fastener 3 to the metal formwork panel 1, first, a female screw part inside the flange 301 of the fastener 3 is lightly screwed into the screw part 201 of the separator 2, and the screw part 201 and the temporary part 3 are temporarily attached. Fix it. By pushing the C-shaped slit 102 having an outer diameter larger than that of the round washer 202, a hole for inserting the separator 2 is opened in the metal mold panel 1, so that the separator 2 is inserted from the outside, and the round washer 202 on the front side is As soon as it passes through the hole of the metal mold panel 1, the spacer 4 is inserted from above so as to sandwich the separator 2. When the fastener 3 is rotated, the projecting piece 203 comes into contact with the inner surface of the spacer 4 and the idle rotation of the separator 2 is fixed. Further, since the separator 2 falls and contacts the lower end of the hole due to gravity, the lower part of the round washer 202 comes into contact with the metal formwork panel 1, and when the fastener 3 is continuously turned, the spacer 4 is sandwiched between them. The metal washer panel 1 and the round washer 202 of the separator 2 are fixed, and the separator 2 is fixed perpendicularly to the surface of the metal mold panel 1 as shown in FIG.

  As described above, by making the C-shaped slit 102 wider than the circular washer 202, the separator 2 can be inserted from one side, and the bottom surface of the rib 101 can be fitted with the spacer 4 in the width. By having the dimensions, it is possible to prevent idle rotation when the separator 2 and the fastener 3 are screwed together. Therefore, a concrete formwork can be easily assembled by one person.

  FIG. 5 is a perspective view of a mold assembled using the hexagonal washer 5. A C-shaped slit 102 is formed on the bottom surface of the rib 101 of the metal mold panel 1 as in the first embodiment. The concrete formwork of Example 2 is assembled using the metal formwork panel 1, the hexagonal washer 5 shown in FIG. 6, and the separator 2 shown in FIG.

  As shown in FIG. 6, the width of the w portion of the hexagonal washer 5 is about 20.8 mm, for example, and separators with different screw diameters are distributed depending on applications such as civil engineering and architectural use. Even if it is a use, the w part width dimension of the hexagonal washer 5 has the same outer diameter in consideration of unification of work tools. Therefore, even a separator having different screw diameters for civil engineering and construction can be used in the metal mold panel 1. The width dimension of the bottom surface of the rib 101 of the metal mold panel 1 is formed to be approximately the same as or slightly narrower than the width of the w section, and the hexagonal washer 5 can be fitted therein.

  Further, the separator 2 shown in FIG. 7 has a male screw portion 201 for screwing with the hexagonal washer 5 and the metal mold panel 1 sandwiched between the metal mold frame panel 1 when screwed. A round washer 202 that sandwiches the hexagonal washer 5 and the metal mold panel 1 is formed on the surface.

  Next, the method for assembling the concrete form using the metal form panel 1, the separator 2 and the hexagonal washer 5 will be described in detail with reference to FIG. (A) thru | or (d) of FIG. 8 are planar view sectional drawings which show the mode. First, the C-shaped slit 102 of the metal mold panel 1 is pressed to open a hole through which the male screw portion 201 of the separator 2 can be inserted, and the hexagonal washer 5 is inserted into the hole from the outside of the metal mold panel 1. Are brought into contact with each other (FIG. 8A). Next, from the inside of the metal mold panel 1, the male screw portion 201 of the separator 2 is inserted into the hole and the screw hole of the hexagonal washer 5 (FIG. 8B), and turned so as to pull the separator 2 inward. Then, the separator 2 is screwed together (FIG. 8C).

  Thereby, since the outer hexagon washer 5 is fixed to the bottom surface of the rib 101, the separator 2 can be easily fixed alone from the inside without causing the separator 2 to idle (FIG. 8D). . The hexagonal washer 5 may be fixed to the outside of the metal mold panel 1 and the bottom surface of the rib 101 with an adhesive or the like.

  As shown in Fig. 9, in order to make effective use of land, the neighboring walls are approaching where the work space width s should be secured on both sides of the formwork due to the influence of narrow land, boundary lines, and adjacent structures. There may be cases where sufficient work space cannot be secured. In such a case, after the metal formwork panel 1 is discarded and built in the runner β installed on the concrete 11, the hexagonal washer 5 is previously set on the separator 2 from the work space s side. The C-shaped slit 102 is inserted into the hole opened and screwed into the hexagonal washer 5 on the t side. Even if the space t is small as a work space, if the hexagon washer 5 is set on the outside (t side) of the metal formwork panel, the separator 2 can be easily fixed by turning the separator 2 from the inside. .

  On the s side where the working space is sufficient, the steel pipe is built in and supported by the pipe support 6 as usual, and is supported against the adjustment of the formwork and the deformation of the formwork when placing concrete. On the t side where there is not enough space, an angle rope or the like may be used as a discarded material, and earth and sand 12 may be backfilled before placing concrete in the space t, and finally the concrete 11 is placed.

  INDUSTRIAL APPLICABILITY The present invention can be used not only for civil engineering construction but also for formwork for concrete structures in general.

DESCRIPTION OF SYMBOLS 1 Metal formwork panel 1 'Wooden formwork panel 1 "Conventional metal formwork panel 101 Rib 102 C-type slit 2 Separator 201 Screw part 202 Round washer 203 Projection piece 3 Fastener 301 Flange 4 Recessed spacer 5 Hex washer 6 Pipe support 11 Concrete 12 Earth and sand α Waste concrete β Runner γ Steel pipe A Gap s Work space t Space

Claims (1)

A metal used as a dam plate for a frame constituting a standing surface of a concrete for civil engineering and construction, in which ribs are formed at predetermined intervals by bending a metal plate, and C-shaped slits are provided at predetermined intervals on the bottom surface of the ribs In the formwork panel,
The width dimension of the C-shaped slit is a width dimension through which a separator round washer that contacts the inner surface of the panel and fixes the separator when the separator is tightened can be inserted,
The metal mold panel according to claim 1, wherein the rib has a groove shape that can be fitted with a spacer that fills a gap of the rib when the separator is fixed.

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