JPH0135147B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for easily forming concrete formwork and a formwork panel connector used therein.

When constructing a concrete wall, etc., conventionally it is necessary to construct a panel made of plywood 1800 mm long, 900 mm wide, and 12 mm thick, with crosspieces on both sides and holes for tightening rods placed at appropriate intervals. Depending on the height and width of the wall, etc., stand up in two rows facing each other with the crosspieces on the outside.
A separator is interposed between the panels, and a tightening rod made of a screw rod integrated with the separator is inserted into and projects through the tightening rod insertion hole of the panel. Arrange a restraining member, place a restraining member on top of the two panel restraining members with the tightening rod between them, orthogonal to the restraining member, and screw a nut onto the tightening rod to tighten the clamping member. A construction method is used in which a formwork is formed by tightening the concrete, and then concrete is poured into the formwork.

According to this construction method, concrete walls, etc. can be constructed successfully, but the panel restraining material used to form the formwork in this construction method is usually a long steel pipe, so it is long and quite heavy. Therefore, it is not only difficult to handle and takes time to carry in and out, but also transportation costs are high.In addition, many workers are required during the work, which leads to high labor costs, which combined with low work efficiency. However, the disadvantage is that the construction costs are inevitably high.

The present invention has been made in view of the above-mentioned drawbacks of the prior art.
He has previously invented a method for forming concrete forms that is simple, efficient, and comparable in strength to conventional formwork, and is currently applying for a patent.

This method of forming concrete formwork consists of two rows of facing panels made of plywood or the like of an appropriate thickness that are strong enough to maintain flatness without bending when formed into formwork and concrete is poured into the formwork. A rod-shaped spacer is interposed between the joints of adjacent panels in one row and the joints of adjacent panels in the other row, and the panels are placed vertically in relation to the spacers. A method of forming a formwork by tightly connecting adjacent panels using fasteners that simultaneously tighten them,
Formwork can be formed easily and efficiently, but
To connect adjacent panels, simply press them together and tighten them with fasteners, so after connecting,
There is a risk of gaps forming, and if a gap occurs, when concrete is poured, moisture containing cement components will enter the gap, and after the concrete dries, cement will adhere to the sides of the panel, causing problems in subsequent use. There is a risk of malfunction.

The present invention has been made for the purpose of improving the above-mentioned invention and providing a method for forming a formwork in which there is no possibility of creating gaps between the panels after the formwork is formed, and a formwork connector used therein. The structure of the formwork is made of plywood of appropriate thickness, which is flat with no irregularities on the front and back, and has the strength to maintain flatness without bending when concrete is poured into the formwork. Two rows of multiple panels each having semicircular cutouts or the like at regular intervals on the surface and one or more connecting holes at regular positions on the back surface at an appropriate distance from both sides. A connecting tool that is installed vertically facing the panel, has a substantially square shape in front, and is formed to be able to expand and contract in left and right length, in connecting recesses facing left and right on the back surfaces of adjacent panels in the same plane. By inserting the feet of the connector, reducing the left and right length of the connector and tightening it, adjacent panels in the same plane are firmly connected on their sides, while adjacent panels in each row facing each other are connected tightly. A bar-shaped spacer is interposed between the hole-shaped joint formed by the notch, and the spacer is connected to the spacer to simultaneously press and tighten adjacent panels in the thickness direction, so that the panels are flat. The panels are formed into a formwork by tightening the panels together using a fastening tool having a pressed surface, and the connecting tool has a configuration of a screw rod with a screw in the horizontal part. a first connecting member having a hook-shaped locking portion integrally connected to the lower end thereof; and a second connecting member having the same or substantially the same shape as the first connecting member and having or not having a screw opposite to the screw in the horizontal portion. It consists of a connecting member and a sleeve that connects these two members, and a screw that engages with the screw of the first connecting member is provided on the inner wall of one side of the sleeve to connect the members, and a second connecting member is installed on the other side. It is characterized in that it is connected in the same way as the first connecting member, or it is connected rotatably in a fixed position.

Next, embodiments of the present invention will be described with reference to the drawings.

1 is a formwork forming panel made of plywood, which is thicker than the plywood used for normal panels, and is thick enough to maintain its flatness without bending even if it is formed into a formwork and concrete is poured and pressure is applied to the inner wall. It has a strength of
A number of semicircular notches 2 are provided at a distance of 600 mm), and an appropriate number of connecting recesses 3 are provided at fixed positions at appropriate distances from both end faces, and the thickness thereof is 28 mm.
mm, the width is usually 400 mm, and the length is determined by the height of the wall, etc. to be constructed.

4 is a screw rod 4 with a right-hand thread 41 in the horizontal part.
A first connecting member 5 is formed by integrally connecting a hook-shaped locking part 43 at the lower end of 2, and 5 is ¬-shaped and has a left-hand thread 5 in the horizontal part.
A hook-shaped locking portion 53 is attached to the lower end of the screw rod 52 provided with
A second connecting member 6 is provided with a screw 61 screwed into the right-hand screw 41 on one side inner wall, a screw 62 screwed into the left-hand screw 51 on the other side inner wall, and a second connecting member 6 formed by integrally connecting the two. A sleeve is formed into a rectangular shape 63, and the above 4 to 62 constitute a connector A, and the screws 41 and 51 of the first connecting member 4 and the second connecting member 5 are screwed into the screws 61 and 62 of the sleeve 6, A plurality of the panels 1 are lined up and a concave hole 3 for connecting adjacent panels is formed.
By inserting the locking portions 43, 53 into the sleeve 6, inserting a wrench into the rectangular portion 63 of the sleeve 6, rotating the sleeve 6, and screwing the screws 41, 51 into the square portions 61, 62, the two screws can be attached in a so-called turnbuckle manner. The panels are tightly tightened and connected. For this purpose, the bent parts of the locking parts 43, 53 of the connecting members 4, 5 are formed at acute angles, so that when tightened, the legs of these locking parts touch the upper part of the connecting recess 3 of the panel on the connected side. This prevents the screw rods 42, 52 from being pressed and deformed, and also prevents the horizontal portions of the screw rods 42, 52 from warping due to the connecting ends of the locking portions coming into contact with the surface of the panel. In the above embodiment, the first connecting member 4 and the second connecting member 5 have the same shape and are both provided with a screw, but both connecting members may not have the same shape, and one may have a screw and the other may have a screw. may be attached to the sleeve 6 such that it can rotate at a fixed position and cannot be removed.

7 has a flange 71 on one side and a screw rod 72 on the other side.
is fixed in the axial direction, and a synthetic resin catch seat 74 is fitted and locked to a hexagonal nut 73 into which the end of a rod-shaped spacer 8 is screwed from the flange 71 side, The seat 74 has a truncated conical cylindrical shape, and its head side is fitted and locked to the flange 71 and is fitted into the nut 73.

Reference numeral 9 designates a flange-like pressing plate 92 on the front surface of a hexagonal cylinder-shaped screw cylinder 91 into which the screw rod 72 of the seat member 7 is screwed.
The pressing plate 92 has a shape with three arcuate notches 93 spaced apart by 120 degrees on the circumferential side of a circle. This is for rotating the tightening member 9 by hitting it with a hammer or the like.

In order to form the panel 1 into a formwork, first, the seat members 7 are connected to both ends of the spacer 8, and a plurality of panels 1 are connected to each other by the connecting tool A as described above. They are firmly connected horizontally and are erected in two rows with an interval corresponding to the length of the spacer 8 and the receiving seat member 7, and are placed in the circular hole formed by the cutout 2 of the adjacent panel. The screw rod 72 of the seat member 7 is inserted into the screw rod 72 so that its tip protrudes outward from the panel 1, and the tightening member 9 is inserted into the screw rod 72.
If the screw tubes 91 are screwed together and tightened by rotating the screws 91 with a wrench or by hitting the notches 93 with a hammer or the like and rotating them, the back side of the joint between two adjacent panels can be tightened. The receiving member 7 is also pressed against the surface by the pressure of the clamping member 9, and the panels arranged in two rows are firmly connected, forming a formwork for obtaining a wall of a desired thickness, etc. It is.

That is, the method of the present invention uses panels that form the formwork that are thicker and narrower than conventional panels, does not have conventional crosspieces or tightening rod insertion holes, and has appropriate holes on both left and right end surfaces of the panel. Semicircular notches are provided at intervals, and a plurality of panels are connected horizontally using a kneading tool, and the panels are stood upright facing each other in two rows, and the joints of adjacent panels in one row are A bar-shaped spacer is interposed between the formed circular hole and the circular hole formed at the joint of the adjacent panels of the other row facing each other, and the adjacent panels of both rows are connected to each other in relation to the spacer. This is a method of forming a formwork by simultaneously tightening with a tightening tool, and the connecting tool adopts a so-called turnbuckle method, in which two connecting members each having a hook-shaped locking part are connected by a sleeve. The locking portions are inserted into the connecting recesses facing each other in adjacent panels, and the sleeve is rotated to connect the adjacent panels by firmly pressing their opposing end surfaces together. Therefore, not only during formwork formation work but also during formwork dismantling work after concrete has been poured into the formwork and the concrete has hardened and walls etc. have been formed, there is no risk of each panel separating, so the work can be done easily. Not only is it safe, but it also has the following advantages:

(1) In the conventional method, many steel pipes are used as panel holding materials, but these steel pipes are long and heavy, so they are not only difficult to handle and take time to transport to and from the construction site. In addition to high transportation costs, workers are required to support the steel pipe during formwork formation, so labor costs are unavoidably high.
There are various disadvantages due to the use of long steel pipes as panel holding materials, such as difficulty in assembling and disassembling the formwork, but since the present invention does not use steel pipes at all, the above-mentioned difficulties arise. There are none.

(2) In the conventional method, the panel had to be provided with a crosspiece, which increased the cost of manufacturing the panel and required a large space for storage.However, since the panel of the present invention does not have a crosspiece, the panel There is no production cost, and there is no need for a large space to store the panels. Further, since conventional panels are relatively thin, they cannot be used repeatedly many times, but the panels of the present invention are relatively thick, so they can be used repeatedly many times.

As described above, according to the method of the present invention,
Formwork for concrete can be formed more simply, efficiently, and at lower cost than conventional forms, and the connectors and fasteners used to carry out the method of the present invention are simple in structure, easy to use, and It can be manufactured and provided at low cost.

Additional Relationships In the original invention, no particular consideration was given to the connection of adjacent panels other than by using fasteners, so not only was there a lack of stability during the formwork forming work, making it difficult to perform the work, but the panels also The present invention uses so-called turnbuckle type connectors to firmly connect adjacent panels, so that work can be carried out safely at all times. I made it.

[Brief explanation of drawings]

Figure 1 is a front view of an example of a panel used in the present invention, Figure 2 is a front view of an example of a concrete form formed by the method of the present invention, and Figure 3 is an enlarged sectional view of a connecting part using a connector. , FIG. 4 is an enlarged front view of the tightened part using a tightening tool, FIG. 5 is a partially enlarged side view of the concrete formwork, and FIG. 6 is an enlarged longitudinal side view of the main part of FIG. 5. It is. 1...Panel, 2...Semicircular notch, 3...
Recessed hole for connection, A...Connection tool, 4...First connection member, 5...Second connection member, 41, 51...Screw,
42, 52... Screw rod, 43, 53... Locking part, 6
... Sleeve, 61, 62 ... Screw, 7 ... Seat member, 8 ... Spacer, 9 ... Tightening member.

Claims (1)

[Scope of Claims] 1. It has the strength to maintain flatness without bending when it is formed into a formwork and concrete is poured into it, and is made of plywood of a suitable thickness, which is flat with no unevenness on the front and back sides, and has both left and right sides. A plurality of panels are arranged in two rows facing each other, each having semicircular notches at regular intervals and one or more connecting holes at fixed positions on the back surface at an appropriate distance from both sides. At the same time, the feet of the connecting tool are installed in the connecting recesses facing left and right on the back side of adjacent panels in the same plane, and are formed to have a substantially square shape from the front and to be able to expand and contract in the left and right length. By inserting the connector, reducing the left and right length of the connector and tightening it, adjacent panels in the same plane are firmly connected on their sides, while the A bar-shaped spacer is interposed between the hole-shaped joint formed by the notch, and the spacer is connected to the spacer to simultaneously press and tighten adjacent panels in the thickness direction. A method for forming a formwork for concrete, comprising tightening the panels together using a fastener having a pressing surface to form a formwork. 2. A first connecting member in which a hook-shaped locking part is integrally connected to the lower end of a screw rod having a screw in the horizontal part;
It consists of a second connecting member that has the same or substantially the same shape as the first connecting member and has or does not have a screw opposite to the screw in the horizontal part, and a sleeve that connects these two members. A screw is provided to engage the screw of the first connecting member to connect the members, and a second connecting member is connected to the other side in the same manner as the first connecting member, or is connected rotatably in a fixed position. A connecting tool used in a method for forming a formwork for concrete, characterized in that: