JPS6311506B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use This invention relates to the assembly of concrete formwork necessary for forming buildings, structures, etc. by pouring ready-mixed concrete into a space formed by concrete formwork, and It is used to conclude this.

BACKGROUND OF THE INVENTION Methods for assembling and fastening concrete formwork using cross beams, crosspieces, supports, holding fittings, etc. made of iron pipe materials have been generally known. A known method is to frame a large number of formworks, apply cross beams or crosspieces to the outside of the formwork, connect them using home ties, connecting rods, holding fittings, etc., and then tension the supports or support rods. Because it was intended to be fixed in place, it required a large number of iron pipes, and they were assembled vertically and horizontally so that they filled the space, much like a gymnasium. It takes a great deal of labor and time to assemble and disassemble the materials, which increases construction costs and makes it difficult to manage materials.

Purpose of the Invention This invention addresses these conventional problems, and its purpose is to easily and reliably assemble and tighten concrete formwork panels without using any cross beams, crosspieces, supports, etc. of iron pipes, etc. Another object of the invention is to provide a device that can perform such operations such as assembly and disassembly of formwork panels easily, quickly and efficiently, thereby significantly improving work efficiency. It is in the point of increasing it. Another purpose is to reduce material costs and facilitate the management of materials, since materials such as iron pipes are not used.

Structure Therefore, in the present invention, a patch plate is applied from the outside across both sides of the joint between left and right formwork panels, and a home tie insertion penetrating through both the inside and outside surfaces is provided in the center of the plate. In addition to providing holes, engagement grooves consisting of concave vertical grooves that can be fitted with locking flanges protruding from the left and right formwork panels are provided on the inner surface of the backing plate, facing each other on the left and right sides, and the engagement grooves are The groove width is tapered upward and is formed as a dovetail fitting wall, and the home tie insertion hole has a constricted part in the middle so that the small diameter hole and the large diameter hole are connected to the upper and lower parts. That's what happens.

Embodiment The patch plate 1 is formed into a square or disc shape with one side or diameter of about 300 mm, and the inner surface 1a is formed to be flat so that it can be applied to the joint 4 of the left and right formwork panels 2 and 3 across both sides. Central boss portion 1b and outer ring portion 1
It is formed into an integral structure with ribs 1d arranged radially on the c and 1d to reduce mass and have a shape that is easy to hold with one hand. The material is light metal alloy or plastic.
Alternatively, it may be made of wood, etc. A home tie insertion hole 5 penetrating both the inside and outside surfaces is provided at the center of the boss portion 1b. The engaging hole 5 has a constricted portion 5c in the middle, and has a small diameter hole 5a in the upper part and a large diameter hole 5b in the lower part, so that the whole has a daruma shape. Further, on the inner surface 1a side of the backing plate 1, engaging grooves 6 and 7, which are concave vertical grooves, are provided oppositely on the left and right sides of the engaging hole 5. The engaging grooves 6, 7 are fitted with the engaging flanges 8, 9, which have an inverted conical shape and are protruded from the outer surfaces of the left and right panels 2, 3, and are engaged when inserted from the bottom of the vertical groove and pushed upward. It's starting to stop. Therefore, the engaging grooves 6 and 7 have groove widths that taper upwardly and form dovetail fitting walls 6a and 7a.

The locking flanges 8 and 9 to be attached to the formwork panels 2 and 3 are made by combining a pair of male and female conical countersunk bolts as shown in Fig. 5, or by ordinary single conical countersunk bolts. Outer surface 2 of panels 2, 3 in a conical shape
Any material may be used as long as it is fixed and protrudes from the sides a and 3a.

Such locking flanges 8 and 9 are installed in advance in the engagement grooves 6 and 9 of the backing plate 1 in the vicinity of the joint between the formworks 2 and 3.
Install it so that it corresponds to 7.

Operation To assemble and fasten concrete forms, proceed as follows.

First, a large number of panels 2, 3, etc. are laid out in the left and right direction at intervals from front to back, and the formwork panels corresponding to the front and back are held by connect rods 11 formed by connecting metal fittings 10 at both ends. let Bracket 10
The shaft portion 10a is connected to the joint portion 4 of the left and right formwork panels 2 and 3.
It protrudes further outward and faces the middle of the locking collars 8 and 9.

Next, the backing plate 1 is placed thereon, and the locking flanges 8 and 9 are fitted into the left and right engaging grooves 6 and 7. This locking collar is fitted into the wide portion 6b below the engagement grooves 6, 7.
Start from the 7b side and pull down the backing plate 1 after fitting. Then, the locking flanges 8 and 9 at the wide width portions slide toward the upper narrow width portions 6c and 7c, so that the left and right formwork panels 2 and 3 are pulled towards the center by a wedge action due to the inclination, and the dovetail fitting wall Since it is engaged with the locking flanges 8, 9 by means of 6a, 7a, the backing plate 1 is fixed as if stuck to the outer surface of the formwork panels 2, 3, and will not come off accidentally thereafter.

In the position where the backing plate 1 is pulled down, the shaft end threaded portion 10b of the bracket 10 faces the upper small diameter hole 5a of the home tie insertion hole 5, so the home tie 1
3 is inserted, and is screwed and connected to the threaded portion 10b using the screw hole 13a at the end. Finally, when the wedge 14 is driven into the wedge hole 13b at the tip of the home tie, the formwork panel is completely fixed both front and back.

Fresh concrete is poured into the space between the front and rear formwork panels thus formed.

It is also possible to connect the home tie 13 to the receiving metal fitting 10 before attaching the backing plate 1 to the joining portion of the left and right formwork. In this case, when applying the patch plate 1, the home tie 13 should be inserted into the large diameter hole 5b at the bottom of the insertion hole 5.
is inserted and guided from the constricted part 5c to the small diameter part 5a by pulling down. Home tie 1 in small section 5a
If the plate 3 is rotated 90 degrees, it will become flat and sideways and will not be able to pass through the constriction, thereby preventing the upward movement of the backing plate 1.

Effects of the Invention This invention has the above-mentioned configuration, and the home tie insertion hole provided in the center and the engagement grooves provided on the left and right sides of the hole are aligned with the corresponding positions and engaged with the engagement flange. By simply pulling the formwork downwards, the left and right formwork panels can be set in a state where they are pulled toward the center by the slope of the engagement groove and the dovetail wall, and the horizontal bars, supports, and support rods can be set in a state where they are pulled toward the center with a single touch. It is possible to easily and securely connect the frame to the frame without the need for any tools, and since the outside of the formwork can be left with a large space, it is easier to work, there is no danger, and safety is improved. Moreover, since materials such as iron pipes are no longer required, troublesome drawbacks such as securing a material storage area and material management can be solved at once, and assembly and disassembly are easy, greatly increasing efficiency. Furthermore, the structure is simple and can be implemented at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view thereof, FIG. 2 is a front view seen from the back side of the backing plate, FIG. 3 is a vertical side view of the same, and FIG. 5 is a side view of the locking collar, and FIG. 6 is a side view of the fastening fitting. 1...Packing board, 2, 3...Formwork panel, 4...
Joint part, 5... Home tie insertion hole, 6, 7... Engagement groove, 8, 9... Locking collar, 6a, 7a... Dovetail fitting wall, 5a... Small diameter hole, 5b... Large Diameter hole, 5c...
Waist part.

Claims (1)

[Scope of Claims] 1. A backing plate applied from the outside across both sides of the joint between left and right formwork panels, which is provided with a home tie insertion hole penetrating both the inner and outer surfaces in the center of the plate, and , Engagement grooves consisting of concave longitudinal grooves that can fit with the locking flanges drilled in the left and right formwork panels are provided on the inner circumferential side of the backing plate, facing each other on the left and right sides, and the engagement grooves are tapered at the top. 1. A concrete formwork fastening device characterized by having a groove width that is inclined at a slope and formed as a dovetail wall. 2. The concrete mold according to claim 1, wherein the home tie insertion hole has a constricted part in the middle and is formed by connecting a small diameter hole and a large diameter hole in a vertically connected manner. Frame fastening device. 3. The concrete form fastening device according to claim 1, wherein the patch plate is formed in a square or disc shape.