JPS6335785B2 - - Google Patents

Description

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

BACKGROUND ART A method of assembling and fastening a concrete form using horizontal beams, supports, holding fittings, etc. made of iron pipe materials has been generally known. A known method is to frame a large number of formwork panels, apply horizontal beams to the outside of the formwork from the outside, connect them using connecting rods, holding fittings, etc., and then use the supports or support rods as tension rods. Moreover, since it was fixed with nails, it required a large number of iron pipes, and they were assembled vertically and horizontally so that they filled up the space, much like a gymnasium. Therefore, it takes a great deal of labor and time to assemble the panels and materials, and it also takes time to disassemble them, which increases construction costs and makes it difficult to manage materials.

Purpose of the Invention The present invention addresses these conventional problems, and its purpose is to easily and reliably form concrete formwork panels without using horizontal beams or supports such as iron pipes or nailing. The object of the present invention is to provide a device that can be assembled and tightened at a cross joint.
Another purpose is to significantly improve work efficiency by making it possible to perform operations such as assembly and disassembly of such formwork panels easily, quickly and efficiently. Another purpose is to reduce material costs and facilitate the management of materials because materials such as iron pipes and nails are not used.

Means for Solving the Problem In order to achieve the above object, the present invention includes a metal plate that is applied across the criss-cross joints of four formwork panels, and an inner surface that is the contact surface side. A tightening slide hardware consisting of a rectangular plate body that is slidably fitted vertically and horizontally into a rectangular slide hardware fitting recess formed in the center of the stopper, the center part of the pad. A home tie insertion hole is provided which penetrates both the inner and outer surfaces of the sliding hardware and communicates with the engaging slot in the center of the sliding hardware, and the sliding hardware is fitted with an engaging protrusion protruding from the upper and lower formwork panels. In order to tighten the upper and lower formwork panels, tapered horizontal grooves are provided with the opening side wide and the gap narrowing toward the back. The cam surface is formed with an inclined cam surface that comes into contact with the inclined angle portion of the slide member and pushes the slide hardware laterally.

The tapered lateral groove is formed as a dovetail groove wall that is dovetail-fitted with the engagement protrusion and does not come out.

The slide hardware fitting recess has an upper wall, an inclined cam surface, and a pushing side surface formed as a dovetail groove wall that is dovetail-fitted with the slide hardware and cannot be removed.

Embodiment The pad 1 is formed into a square or disc shape with one side or diameter of about 300 mm, and is attached to the outside at the criss-cross joint 4 of four formwork panels 2, 3, 2', and 3' that are joined vertically and horizontally. The inner surface 1a is formed flat so that it can be applied from the inside, but the central boss portion 1b and the outer ring portion 1c are formed into an integral structure with radially arranged ribs 1d to reduce mass and have a shape that is easy to hold with one hand. has been done. The material may be metal such as light metal alloy, plastic, or wood. This boss portion 1b is provided with a recess 5 for fitting a slide metal fitting, which will be described later. As shown in FIGS. 3 and 4, the slide hardware 6 has a rectangular plate body with two tapered lateral grooves 7 and 8 that are open on one side, and an engaging groove hole 9 in the middle thereof. The interval between the tapered lateral grooves 7 and 8 is wide on the side openings 7a and 8a, and becomes narrower toward the back. Also, these tapered horizontal grooves 7 and 8 are provided with engagement protrusions 1 protruding from the formwork panel.
0, 11, 12, and 13 fit together,
Dovetail groove walls 7b and 8b are formed so that once they are fitted from the side opening side, they will not come off. The recess 5 on the inner surface of the pad 1 has a similar shape to the slide hardware 6, but is made slightly larger so that the slide hardware fitted in the recess can slide vertically and horizontally. Further, this recess 5 is formed with an inclined cam surface 14 that pushes the slide hardware 6 laterally when the stopper 1 is pulled down, and the corresponding slide hardware 6 also has an inclination angle 6a.
form. Further, the upper wall of the recess 5, the inclined cam surface, and the side surface on the pushing side form dovetail groove walls 5a, 5b, and 5c that are dovetail-fitted with the slide metal fitting 6 and do not come off.

The engaging protrusions 10, 11, 12, 13 attached to the formwork panels 2, 3, 2', 3' are either a combination of a male and a female conical countersunk bolt as shown in Fig. 2, or a normal single conical bolt. A countersunk bolt is used, but any bolt with a conical countersunk head that is fixed and protrudes from the outside surface of the panel may be used.

These engaging protrusions 10, 11, 12, 13 are placed in advance at positions corresponding to the tapered lateral grooves 7, 8 of the sliding hardware 6 in the vicinity of the cross-shaped joints 4 of the formworks 2, 3, 2', 3'. Attach and secure it.

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

First, a large number of panels 2, 3, 2', 3', etc. are laid out side by side in the left and right and up and down directions at intervals from front to back, and the formwork panels corresponding to the front and rear are connected to each other by mounting metal fittings 15 on both ends.
It is held by a connecting rod 16 formed by connecting the two. The threaded shaft part 15a of the receiving fitting 15 is projected outward from the cross joint part 4 of the upper and lower and left and right formwork panels 2, 3, 2', 3', and the home tie 17 is connected thereto.

Next, place the slide hardware 6 on it,
The engaging protrusions 10 and 12 are fitted into the upper tapered lateral groove 7, and the engaging protrusions 11 and 13 are fitted into the lower tapered lateral groove 8 through the side openings 7a and 8a. A metal fitting 1 is placed on top of the metal fitting 1, and the sliding hardware 6 is fitted into the recessed part 5, so that both 1 and 6 are connected.

At this time, the home tie 17 protruding outward from the cross-shaped joint 4 is passed through the center engagement slot 9 of the slide hardware 6 into the home tie engagement hole 18 that communicates with the inner and outer surfaces of the center part of the backing metal 1. put.

Next, push the entire pad 1 to the left in FIG. 1 (arrow A, arrow B in FIG. 3). Then, the slide hardware 6 is pressed against the right side wall 5d of the recess 5 and is pushed in the same direction as the pad 1. Therefore, the engaging protrusion 1 fitted into the tapered lateral grooves 7 and 8
0, 12, 11, and 13 move relatively to the inner part of the horizontal grooves 7 and 8 while maintaining their respective intervals, so that the upper and lower intervals are narrowed by the taper, resulting in the upper and lower panels 2 and 3
and 2' and 3' are attracted to each other from above and below. Furthermore, when the stopper 1 is pulled down in this state, the slide hardware 6 is pressed against the upper dovetail wall 5a of the recess by the inclined cam surface 14 of the recess 5, and this causes a force to be applied to the right side (the upper dovetail wall 5a). It is slid to arrow A in Figure 1 and arrow B in Figure 3). Therefore, the right engaging protrusions 12 and 13 located at the innermost ends 7c and 8c of the tapered lateral grooves 7 and 8 are pushed closer to the left engaging protrusions 10 and 11.
Therefore, the left and right panels 2, 2' and 3, 3' are attracted to each other, so that in the end, the four panels are joined together by a strong force so that they approach each other around the criss-cross joint 4.

And finally, the wedge fitting hole 1 of the home tie 17
The series of operations is completed by driving a wedge 20 into 7a. In addition, in this fastened state, the slide hardware 6 fitted into the recess 5 of the pad 1 is pressed against the upper part of the recess 5, the inclined cam surface, and the left side, so each surface is in the dovetail groove walls 5a, 5b, and 5c. This prevents both 1 and 6 from becoming uncoupled.

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

When disassembling, first remove the wedge 20, move the stopper upwards, and then push it to the right (in the opposite direction of arrow A) in Figure 1 to remove the slide hardware 6.
moves in the direction of loosening, so it comes out of the recess 5.

Effects of the Invention This invention has the above-mentioned configuration, in which a sliding metal fitting is fitted into a recess provided in the center of the inner surface of the pad, and an engaging protrusion protruding from the outer surface of the panel is fitted into a tapered lateral groove of the sliding metal fitting. By simply pulling the stopper down and pushing it to the left at the same time, you can firmly join four panels together in the direction of the cross joint with one touch. It is possible to easily and securely connect the frame to the frame on all sides without the need for horizontal beams, supports, nails, etc., and the outside of the formwork can be left with a large space, making the work easier. It is easy to use, there is no danger, safety is increased, and materials such as iron pipes are no longer required.
Troublesome issues such as material storage, securing, and material management can be solved all at once, and assembly and disassembly are easy, greatly increasing efficiency. Moreover, 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; FIG. 1 is a front view thereof, FIG. 2 is a vertical side view taken from line A-A in FIG. 1, and FIG. 3 is a front view seen from the back side of the pad. FIG. 4 is a front view of the sliding metal fitting, and FIG. 5 is a side view of the fastening metal fitting. 1... Brace, 2, 3, 2', 3'... Form panel, 4... Cross joint, 5... Recess, 6... Slide hardware, 7, 8... Tapered lateral groove, 9... Engagement slot, 10, 11, 12, 13...Engagement protrusion, 1
4... Inclined cam surface, 18... Home tie insertion hole.

Claims (1)

[Scope of Claims] 1. A pad 1 applied so as to straddle the criss-cross joints 4 of the four formwork panels 2, 2', 3, 3';
Connection with a tightening slide hardware 6 made of a rectangular plate that is slidably fitted in the rectangular slide hardware fitting recess 5 formed in the center of the inner surface that is the contact surface side in the vertical and horizontal directions. A home tie engagement hole 18 is provided which penetrates both the inner and outer surfaces of the central portion of the pad 1 and communicates with the engagement slot 9 at the center of the slide hardware 6, and the slide hardware 6 has an upper and lower mold. The openings 7a, 8 are arranged so as to fit with the engagement protrusions 10, 11, 12, 13 protruding from the frame panels 2, 3, 2', 3' to tighten the upper and lower formwork panels.
Tapered horizontal grooves 7 and 8 are provided with an inclination such that the a side is wide and the interval becomes narrower toward the back, and when the pad 1 is pulled downward, the sloped angle portion of the slide hardware 6 is formed in the recess 5 for fitting the slide hardware on the inner surface 1a of the pad. A concrete formwork four-way pulling and fastening device characterized by forming an inclined cam surface 14 that abuts against the slide hardware 6a and pushes the slide hardware 6 laterally. 2 The tapered lateral grooves 7, 8 are engaged with the protrusions 10, 1
1, 12, 13, and is formed as dovetail groove walls 7b, 8b which are dovetail-fitted and do not come off. 3 The sliding hardware fitting recess 5 has an upper wall, an inclined cam surface 14, and a side surface on the pushing side for fitting the sliding hardware 6.
Dovetail groove walls 5a, 5b, 5 that are dovetail-fitted and do not come off
Claim 1 formed as c.
Concrete formwork four-way pulling fastening device as described in section.